Digital currency cre
Publish: 2021-04-20 02:51:04
1.
The concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, open source software was designed and released, and P2P network was built on it
bitcoin is a kind of universal encrypted electronic currency in the world, and it is completely autonomous by users. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
bitcoin can be cashed and converted into the currency of most countries. Users can use bitcoin to buy some virtual items, such as clothes, hats and equipment in online games. As long as someone accepts it, they can also use bitcoin to buy real-life items
2.
< P > Network Express
1、 Ordinary mail means ordinary mail, that is, ordinary mail. Or ordinary package, it has no strict time limit, that is, which bus to catch and which bus to take, generally takes 7-20 days. Surface mail is a general term for the postal business of sending letters and parcels
extended data:
I. difference
1. Surface mail: it is a relatively common and slow delivery service of post office, which usually takes half a month (depending on the situation)
EMS: an express delivery service of the post office, which has a wide range and can be delivered as long as there is a post office Second, express delivery instry in China, express delivery operators can operate in different scales, ranging from serving specific towns to regional, transnational and even global services. At present, the major global express companies include DHL international express, UPS express, FedEx and TNT expressthe main express delivery agencies in China are: trans express, SF express, postal express, high-speed rail express, home express, Zhongtong express, Yuantong express, Shentong express, Baishi express, Yunda express, Guotong express, Tiantian express, express express, express, Quanfeng express, Quanyi express, Dayi express, rufengda express, Nengda express, Debang logistics Express express, Jingdong express and other express operations
3. EMS common problems
1. EMS customer service call. Customer service hotline: 11183
2. Log in to the website for inquiry. When you inquire about international EMS mail, you can also go to the postal websites of relevant countries and regions to inquire through the inquiry link
3. Log in to the EMS website to enter the user's message, and provide the mail number and the specific address of the recipient in the message. We will help you to inquire and inform you of the inquiry results when you reply to the message
4. In case of unsuccessful inquiry, the sender should go to the post office where you send the EMS mail for inquiry with the EMS mail details sheet (sender's deposit sheet) and receipt
5, EMS mail number
there are 13 digits in EMS mail number, of which the first two are English letters, e is the first letter of the English abbreviation of postal express, the second letter is the serial number (such as ea, EB, ED, etc.), the last two English letters CN represent the meaning of China, and the middle nine are Arabic numerals. Only when the mail number is complete and correct, can the mail information be queried
source of reference:
Network surface mail
< P > Network Express
3. create table test
(
id int not null identity(0,1),
name varchar(200) not null,
salary float(11),
sex varchar(2),
age int
);
(
id int not null identity(0,1),
name varchar(200) not null,
salary float(11),
sex varchar(2),
age int
);
4. Data type
in Microsoft & reg; SQL Server™ In, each column, local variable, expression, and parameter has an associated data type, which is a property of the data type (integer, character, money, etc.) that the specified object can hold. SQL server provides system data type set, which defines all data types that can be used with SQL server. The data type set provided by the system is listed below
user defined data types can be defined, which are aliases of data types provided by the system. For more information about user-defined data types, see sp_ AddType and create a user-defined data type
when two expressions with different data types, sorting rules, precision, decimal places or length are combined by operators:
the data type of the resulting value is determined by applying the priority rules of the data type to the data type of the input expression. For more information, see data type precedence
if the result data type is char, varchar, text, nchar, nvarchar or ntext, the ranking rule of the result value is determined by the priority rule of the ranking rule. For more information, see precedence of collations
the precision, decimal places and length of the result depend on the precision, decimal places and length of the input expression. For more information, see precision, decimal places, and length
sql server provides data type synonyms for SQL-92 compatibility. For more information, see data type synonyms
exact number
integer
bigint
integer data (all numbers) from - 2 ^ 63 (- 9223372036854775808) to 2 ^ 63-1 (9223372036854775807)
int
integer data (all numbers) from - 2 ^ 31 (- 2147483648) to 2 ^ 31 - 1 (2147483647)
smallint
integer data from - 2 ^ 15 (- 32768) to 2 ^ 15 - 1 (32767)
tinyint
integer data from 0 to 255
bit
bit
1 or 0
decimal and numeric
decimal
digital data with fixed precision and decimal places from - 10 ^ 38 + 1 to 10 ^ 38 – 1
numeric
is equivalent to decimal in function
money and smallmoney
money
the monetary data value is between - 2 ^ 63 (- 922337203685477.5808) and 2 ^ 63 - 1 (+ 922337203685477.5807), accurate to ten thousandths of the monetary unit
smallmoney
the monetary data value is between -214748.3648 and + 214748.3647, which is accurate to ten thousandths of the monetary unit
approximate numbers
float
floating point precision numbers from -1.79e + 308 to 1.79e + 308
Real
floating point precision numbers from - 3.40e + 38 to 3.40e + 38
datetime and smalldatetime
datetime
date and time data from January 1, 1753 to December 31, 9999, accurate to 3% of a second (or 3.33 MS)
smalldatetime
date and time data from January 1, 1900 to June 6, 2079, accurate to minutes
string
char
fixed length non Unicode character data with a maximum length of 8000 characters
varchar
variable length non Unicode data, up to 8000 characters
text
variable length non Unicode data with a maximum length of 2 ^ 31 - 1 (2147483647) characters
Unicode string
nchar
fixed length Unicode data with a maximum length of 4000 characters
nvarchar
variable length Unicode data with a maximum length of 4000 characters. Sysname is a user-defined data type provided by the system, which is equivalent to nvarchar (128) in function and is used to refer to the database object name< The maximum length of variable length Unicode data is 2 ^ 30 - 1 (1073741823) characters
binary string
binary
fixed length binary data, its maximum length is 8000 bytes< The maximum length of variable length binary data is 8000 bytes< The maximum length of variable length binary data is 2 ^ 31 - 1 (2147483647) bytes
other data types
cursor
cursor reference< br />
sql_ Variant
a way to store various data types (text, ntext, timestamp and SQL) supported by SQL server_ The data type of the (except variant) value
Table
a special data type, which stores the result set for later processing
timestamp
the unique number of the database range, which is updated every time the row is updated
uniqueidentifier
global unique identifier (GUID).
in Microsoft & reg; SQL Server™ In, each column, local variable, expression, and parameter has an associated data type, which is a property of the data type (integer, character, money, etc.) that the specified object can hold. SQL server provides system data type set, which defines all data types that can be used with SQL server. The data type set provided by the system is listed below
user defined data types can be defined, which are aliases of data types provided by the system. For more information about user-defined data types, see sp_ AddType and create a user-defined data type
when two expressions with different data types, sorting rules, precision, decimal places or length are combined by operators:
the data type of the resulting value is determined by applying the priority rules of the data type to the data type of the input expression. For more information, see data type precedence
if the result data type is char, varchar, text, nchar, nvarchar or ntext, the ranking rule of the result value is determined by the priority rule of the ranking rule. For more information, see precedence of collations
the precision, decimal places and length of the result depend on the precision, decimal places and length of the input expression. For more information, see precision, decimal places, and length
sql server provides data type synonyms for SQL-92 compatibility. For more information, see data type synonyms
exact number
integer
bigint
integer data (all numbers) from - 2 ^ 63 (- 9223372036854775808) to 2 ^ 63-1 (9223372036854775807)
int
integer data (all numbers) from - 2 ^ 31 (- 2147483648) to 2 ^ 31 - 1 (2147483647)
smallint
integer data from - 2 ^ 15 (- 32768) to 2 ^ 15 - 1 (32767)
tinyint
integer data from 0 to 255
bit
bit
1 or 0
decimal and numeric
decimal
digital data with fixed precision and decimal places from - 10 ^ 38 + 1 to 10 ^ 38 – 1
numeric
is equivalent to decimal in function
money and smallmoney
money
the monetary data value is between - 2 ^ 63 (- 922337203685477.5808) and 2 ^ 63 - 1 (+ 922337203685477.5807), accurate to ten thousandths of the monetary unit
smallmoney
the monetary data value is between -214748.3648 and + 214748.3647, which is accurate to ten thousandths of the monetary unit
approximate numbers
float
floating point precision numbers from -1.79e + 308 to 1.79e + 308
Real
floating point precision numbers from - 3.40e + 38 to 3.40e + 38
datetime and smalldatetime
datetime
date and time data from January 1, 1753 to December 31, 9999, accurate to 3% of a second (or 3.33 MS)
smalldatetime
date and time data from January 1, 1900 to June 6, 2079, accurate to minutes
string
char
fixed length non Unicode character data with a maximum length of 8000 characters
varchar
variable length non Unicode data, up to 8000 characters
text
variable length non Unicode data with a maximum length of 2 ^ 31 - 1 (2147483647) characters
Unicode string
nchar
fixed length Unicode data with a maximum length of 4000 characters
nvarchar
variable length Unicode data with a maximum length of 4000 characters. Sysname is a user-defined data type provided by the system, which is equivalent to nvarchar (128) in function and is used to refer to the database object name< The maximum length of variable length Unicode data is 2 ^ 30 - 1 (1073741823) characters
binary string
binary
fixed length binary data, its maximum length is 8000 bytes< The maximum length of variable length binary data is 8000 bytes< The maximum length of variable length binary data is 2 ^ 31 - 1 (2147483647) bytes
other data types
cursor
cursor reference< br />
sql_ Variant
a way to store various data types (text, ntext, timestamp and SQL) supported by SQL server_ The data type of the (except variant) value
Table
a special data type, which stores the result set for later processing
timestamp
the unique number of the database range, which is updated every time the row is updated
uniqueidentifier
global unique identifier (GUID).
5. Common sense of commercial real estate
1. Commercial real estate
commercial real estate includes shopping malls, hypermarkets, shopping malls, theme shopping malls, specialized markets, wholesale markets, discount stores, factory direct stores, entertainment commercial real estate, bottom floor shops of residential and office buildings, which are very different from residential real estate procts. In real life, we are most exposed to community commerce, hypermarkets and now emerging shopping mall
2. Business circle
business circle is a term used in retailing, which is also used in commercial property development. It means business circle or business potential circle. It refers to a series of circular or square areas demarcated by customers who reach a certain shopping or consumption frequency within a certain period of time, with the farthest distance as the radius, That is to say, the distribution area of customers who prefer to consume in a certain store or commercial gathering center. Business circles are generally divided into core business circle (the nearest to the consumption place, absorbing 50-80% of the total customers), secondary business circle (absorbing 15-25% of the customers), edge or radiation business circle (absorbing 5-25% of the customers)
business circle refers to the geographical range of customers who preferentially choose to consume in the store, which is centered on the location of the store and expands along a certain direction and distance. In other words, it is the geographical range of customers in the store< What is CBD?
the full name of CBD is central business district. Its concept first appeared in the United States in 1923, which was defined as "commercial convergence". Subsequently, CBD has become the economic development center of a city, a region and even a country. Generally speaking, CBD should have the following characteristics: it is the core function of the city, and the economy, science and technology, culture and Commerce of the city are highly concentrated; It has convenient transportation and huge flow of people, vehicles and logistics; It has the highest population density in the daytime and the largest population change in the daytime and night; It is located in the golden area of the city, with the highest land price; It has many tall buildings and the highest land use rate< Shopping center
4. Shopping center
the World Association of shopping centers defines shopping center as "a combination of retail and other commercial facilities designed, developed, owned and managed as an independent real estate." Including regional shopping centers, medium-sized shopping centers, retail parks, professional shopping centers and other forms
generally speaking, shopping mall, transliterated "Moore" or "sales trade", means large shopping center, which is a new type of complex business. Moore (shopping center) refers to a super business center with huge scale, integrating shopping, leisure, entertainment and catering, including department stores, hypermarkets and many professional chain retail stores
in a strict sense, shopping centers are less than 100000 square meters; If the number is greater than this and the business type is highly complex, it can be called Moore mall; And more than 200000 square meters, can be called super mall super Moore shopping center< In general, the definition of hypermarket is: the area of hypermarket is at least 2500 square meters, selling a wide range of food and non edible procts. Hypermarkets are medium-sized supermarkets that mainly sell fresh food and daily necessities, supplemented by department stores. However, fresh food and daily necessities are the most distinctive commodities in supermarkets
6. Commercial street
commercial street can be divided into urban commercial street, theme commercial street and characteristic street
urban commercial streets, such as Wangfujing pedestrian street in Beijing, Nanjing Street in Shanghai, etc. The first consideration of urban commercial street is its function and orientation in the city
themed commercial streets, such as Sanlitun Bar Street and Shilihe building materials Street in Beijing, are mainly represented by the collection of similar business forms, which are mostly distributed on both sides of the road, and the business varieties of the same business form are very rich
characteristic street: for example, the bottom merchants of some communities and office buildings, because of their unique operation, not only meet the consumption needs of the community, but also radiate to the surrounding areas within a certain range. Over time, the neighborhood atmosphere will naturally form
7. Theme shopping mall
in fact, what is a theme shopping mall has not yet been decided in the instry. Professor Ren mengliming of School of management of Xiamen University thinks that theoretically, there is no clear concept of theme shopping mall; But the theme shopping mall should have at least three basic elements, one is the occurrence of commodity trading behavior; The second is to gather one kind of main commodity, supplemented by other kinds, so that consumers can choose widely; Third, different from monopoly stores, shopping malls must be composed of commodities with similar themes, different characteristics, different services and different brands. At the same time, some experts believe that the biggest difference between theme stores and traditional department stores is that they are characterized by professional operation. The commodities in the whole shopping mall only highlight one theme. Theme shopping mall is a new concept, which not only provides goods for consumers, but also strives to create a good shopping atmosphere. In terms of business philosophy, it changes the previous all sales mode, reflecting a unique theme
8, "sales control"
sales control, that is, real estate developers keep the supply of houses, and there will be a certain proportion of general projects, which will be kept until the end of the project. Some real estate developers claim that they have sold out the sales control houses. At the end of the new year, they quietly enter the market at a low price, and the price is lower than the market price. Among the procts of a real estate, e to the differences in location, house type and other factors, there are naturally good and bad. The common situation of "sales control" is to give priority to the procts with poor conditions such as house type or location, and to keep the procts with good location and house type until the price can reach a higher level. In order to avoid the risk of these units can not be sold, but also concive to good procts in the late sell higher prices
9. Vacancy rate
the international vacancy rate refers to the ratio of the number of unsold houses in the market (including development companies and owners) to the number of all existing houses in the whole society. Our current vacancy rate calculation method is the ratio of the number of commercial houses not sold by developers to the number of commercial houses completed in the previous three years. Commercial real estate includes dominant vacancy rate and recessive vacancy rate. The so-called dominant vacancy rate means that the shops have not been rented or sold since the developers; The hidden vacancy rate refers to the situation that the commercial operation value of the commercial real estate has not been realized after it has been rented and sold from the developer, including the situation that it has to be used for residential or business office< In architecture, depth refers to the actual length between the front wall and the back wall of an independent house or a residential building. Generally speaking, the wider the shop's facade, the better. However, we should not neglect the importance of shop deepening, which refers to the business depth perpendicular to the shop's facade. Generally speaking, the wider the shop's facade width is, the higher its commercial value will be. However, if the shop's facade width does not meet the minimum requirements of the shop's operation, no matter how wide the shop's facade is, it will not be able to play its economic utility. Under normal circumstances, the depth of the shop should not be less than the width of a room's facade of 4 meters, nor should it be deeper than the depth of 20 meters, otherwise, the operation of the shop will be affected
11. Floor height
floor height refers to the height of a residence, which is measured by the unit of "floor". The height of each floor is required by the state in design, and this height is called floor height. It usually includes the distance between the lower floor or floor to the upper floor
12. Property shop
property shop is a new investment concept, which appears in the mode of "cash return + independent property right + service gift". Property shop is a new investment proct. Property type shops are characterized by decentralized property rights, unified management, unified investment and unified leasing, and even charter for investors and home buyers. Of course, investors are also allowed to rent the shops themselves, but the business items are not far from the overall layout of the shopping mall. The investors can get the rent return from the operators, and the operators operate with a unified image. The ability to resist risks is greatly improved, so as to achieve a win-win situation between the owners and the developers
13. Investment promotion
investment promotion is actually investment promotion. Investment promotion is a widely used way of economic communication under the situation of increasingly strengthening economic integration, which requires interdisciplinary and interdisciplinary professional knowledge. Investment planning is to use the knowledge and wisdom of investment personnel to plan a series of activities to attract foreign capital projects< In the mid-1990s, it was introced from Hong Kong, rose in Guangzhou, Shenzhen and other coastal developed cities, and then spread across the country. Its essence is to sell before renting, and to give a fixed proportion of rent return. In order to rece the investment threshold, property rights are often divided to a minimum. At that time, many speculators were crazy about real estate, and many real estate developers fled before the completion of real estate, which caused many uncompleted buildings in the country. Therefore, this kind of marketing method was banned by the Ministry of construction
15, virtual property shop
in the shop sales market, we often see some very attractive sales and return on investment contrast advertisements, such as "10-year rent back", "return on investment up to 15%" and so on. These advertisements often receive good results in the actual sales. This kind of sales mode is called "virtual property shop" for short< After sale charter refers to the agreement made by real estate development and operation enterprises or housing property units with the buyer when the commercial housing invested and constructed by them is sold. Within a certain period of time after the sale, the seller will rent the house as an agent, and the part of the rent ring the charter period will offset the part of the sale price in advance, Or pay a certain rate of return every year. After sales charter generally appears in the sales process of shops, office buildings, commercial residential buildings (such as hotel apartments, commercial residential buildings), etc. there are many forms of after-sales charter, including return on rent, sales with lease, profit sharing, guaranteed dividend, etc. but the common point is that they all attract buyers by promising a certain proportion of rent return, All kinds of specific forms must include two links: house sales and leasing, but there are differences in the detailed arrangements of investors' income
17. Frame shear wall structure is called frame shear wall structure. It is the combination of frame structure and shear wall structure, and absorbs their respective advantages. It can not only provide larger space for building layout, but also has good lateral force resistance performance. The shear wall in frame shear wall structure can be set separately, or the wall of elevator shaft, stairwell and pipe shaft can be used. Therefore, this structure has been widely used in all kinds of housing construction. The deformation of frame shear wall structure is shear bending type. As we all know, the box
1. Commercial real estate
commercial real estate includes shopping malls, hypermarkets, shopping malls, theme shopping malls, specialized markets, wholesale markets, discount stores, factory direct stores, entertainment commercial real estate, bottom floor shops of residential and office buildings, which are very different from residential real estate procts. In real life, we are most exposed to community commerce, hypermarkets and now emerging shopping mall
2. Business circle
business circle is a term used in retailing, which is also used in commercial property development. It means business circle or business potential circle. It refers to a series of circular or square areas demarcated by customers who reach a certain shopping or consumption frequency within a certain period of time, with the farthest distance as the radius, That is to say, the distribution area of customers who prefer to consume in a certain store or commercial gathering center. Business circles are generally divided into core business circle (the nearest to the consumption place, absorbing 50-80% of the total customers), secondary business circle (absorbing 15-25% of the customers), edge or radiation business circle (absorbing 5-25% of the customers)
business circle refers to the geographical range of customers who preferentially choose to consume in the store, which is centered on the location of the store and expands along a certain direction and distance. In other words, it is the geographical range of customers in the store< What is CBD?
the full name of CBD is central business district. Its concept first appeared in the United States in 1923, which was defined as "commercial convergence". Subsequently, CBD has become the economic development center of a city, a region and even a country. Generally speaking, CBD should have the following characteristics: it is the core function of the city, and the economy, science and technology, culture and Commerce of the city are highly concentrated; It has convenient transportation and huge flow of people, vehicles and logistics; It has the highest population density in the daytime and the largest population change in the daytime and night; It is located in the golden area of the city, with the highest land price; It has many tall buildings and the highest land use rate< Shopping center
4. Shopping center
the World Association of shopping centers defines shopping center as "a combination of retail and other commercial facilities designed, developed, owned and managed as an independent real estate." Including regional shopping centers, medium-sized shopping centers, retail parks, professional shopping centers and other forms
generally speaking, shopping mall, transliterated "Moore" or "sales trade", means large shopping center, which is a new type of complex business. Moore (shopping center) refers to a super business center with huge scale, integrating shopping, leisure, entertainment and catering, including department stores, hypermarkets and many professional chain retail stores
in a strict sense, shopping centers are less than 100000 square meters; If the number is greater than this and the business type is highly complex, it can be called Moore mall; And more than 200000 square meters, can be called super mall super Moore shopping center< In general, the definition of hypermarket is: the area of hypermarket is at least 2500 square meters, selling a wide range of food and non edible procts. Hypermarkets are medium-sized supermarkets that mainly sell fresh food and daily necessities, supplemented by department stores. However, fresh food and daily necessities are the most distinctive commodities in supermarkets
6. Commercial street
commercial street can be divided into urban commercial street, theme commercial street and characteristic street
urban commercial streets, such as Wangfujing pedestrian street in Beijing, Nanjing Street in Shanghai, etc. The first consideration of urban commercial street is its function and orientation in the city
themed commercial streets, such as Sanlitun Bar Street and Shilihe building materials Street in Beijing, are mainly represented by the collection of similar business forms, which are mostly distributed on both sides of the road, and the business varieties of the same business form are very rich
characteristic street: for example, the bottom merchants of some communities and office buildings, because of their unique operation, not only meet the consumption needs of the community, but also radiate to the surrounding areas within a certain range. Over time, the neighborhood atmosphere will naturally form
7. Theme shopping mall
in fact, what is a theme shopping mall has not yet been decided in the instry. Professor Ren mengliming of School of management of Xiamen University thinks that theoretically, there is no clear concept of theme shopping mall; But the theme shopping mall should have at least three basic elements, one is the occurrence of commodity trading behavior; The second is to gather one kind of main commodity, supplemented by other kinds, so that consumers can choose widely; Third, different from monopoly stores, shopping malls must be composed of commodities with similar themes, different characteristics, different services and different brands. At the same time, some experts believe that the biggest difference between theme stores and traditional department stores is that they are characterized by professional operation. The commodities in the whole shopping mall only highlight one theme. Theme shopping mall is a new concept, which not only provides goods for consumers, but also strives to create a good shopping atmosphere. In terms of business philosophy, it changes the previous all sales mode, reflecting a unique theme
8, "sales control"
sales control, that is, real estate developers keep the supply of houses, and there will be a certain proportion of general projects, which will be kept until the end of the project. Some real estate developers claim that they have sold out the sales control houses. At the end of the new year, they quietly enter the market at a low price, and the price is lower than the market price. Among the procts of a real estate, e to the differences in location, house type and other factors, there are naturally good and bad. The common situation of "sales control" is to give priority to the procts with poor conditions such as house type or location, and to keep the procts with good location and house type until the price can reach a higher level. In order to avoid the risk of these units can not be sold, but also concive to good procts in the late sell higher prices
9. Vacancy rate
the international vacancy rate refers to the ratio of the number of unsold houses in the market (including development companies and owners) to the number of all existing houses in the whole society. Our current vacancy rate calculation method is the ratio of the number of commercial houses not sold by developers to the number of commercial houses completed in the previous three years. Commercial real estate includes dominant vacancy rate and recessive vacancy rate. The so-called dominant vacancy rate means that the shops have not been rented or sold since the developers; The hidden vacancy rate refers to the situation that the commercial operation value of the commercial real estate has not been realized after it has been rented and sold from the developer, including the situation that it has to be used for residential or business office< In architecture, depth refers to the actual length between the front wall and the back wall of an independent house or a residential building. Generally speaking, the wider the shop's facade, the better. However, we should not neglect the importance of shop deepening, which refers to the business depth perpendicular to the shop's facade. Generally speaking, the wider the shop's facade width is, the higher its commercial value will be. However, if the shop's facade width does not meet the minimum requirements of the shop's operation, no matter how wide the shop's facade is, it will not be able to play its economic utility. Under normal circumstances, the depth of the shop should not be less than the width of a room's facade of 4 meters, nor should it be deeper than the depth of 20 meters, otherwise, the operation of the shop will be affected
11. Floor height
floor height refers to the height of a residence, which is measured by the unit of "floor". The height of each floor is required by the state in design, and this height is called floor height. It usually includes the distance between the lower floor or floor to the upper floor
12. Property shop
property shop is a new investment concept, which appears in the mode of "cash return + independent property right + service gift". Property shop is a new investment proct. Property type shops are characterized by decentralized property rights, unified management, unified investment and unified leasing, and even charter for investors and home buyers. Of course, investors are also allowed to rent the shops themselves, but the business items are not far from the overall layout of the shopping mall. The investors can get the rent return from the operators, and the operators operate with a unified image. The ability to resist risks is greatly improved, so as to achieve a win-win situation between the owners and the developers
13. Investment promotion
investment promotion is actually investment promotion. Investment promotion is a widely used way of economic communication under the situation of increasingly strengthening economic integration, which requires interdisciplinary and interdisciplinary professional knowledge. Investment planning is to use the knowledge and wisdom of investment personnel to plan a series of activities to attract foreign capital projects< In the mid-1990s, it was introced from Hong Kong, rose in Guangzhou, Shenzhen and other coastal developed cities, and then spread across the country. Its essence is to sell before renting, and to give a fixed proportion of rent return. In order to rece the investment threshold, property rights are often divided to a minimum. At that time, many speculators were crazy about real estate, and many real estate developers fled before the completion of real estate, which caused many uncompleted buildings in the country. Therefore, this kind of marketing method was banned by the Ministry of construction
15, virtual property shop
in the shop sales market, we often see some very attractive sales and return on investment contrast advertisements, such as "10-year rent back", "return on investment up to 15%" and so on. These advertisements often receive good results in the actual sales. This kind of sales mode is called "virtual property shop" for short< After sale charter refers to the agreement made by real estate development and operation enterprises or housing property units with the buyer when the commercial housing invested and constructed by them is sold. Within a certain period of time after the sale, the seller will rent the house as an agent, and the part of the rent ring the charter period will offset the part of the sale price in advance, Or pay a certain rate of return every year. After sales charter generally appears in the sales process of shops, office buildings, commercial residential buildings (such as hotel apartments, commercial residential buildings), etc. there are many forms of after-sales charter, including return on rent, sales with lease, profit sharing, guaranteed dividend, etc. but the common point is that they all attract buyers by promising a certain proportion of rent return, All kinds of specific forms must include two links: house sales and leasing, but there are differences in the detailed arrangements of investors' income
17. Frame shear wall structure is called frame shear wall structure. It is the combination of frame structure and shear wall structure, and absorbs their respective advantages. It can not only provide larger space for building layout, but also has good lateral force resistance performance. The shear wall in frame shear wall structure can be set separately, or the wall of elevator shaft, stairwell and pipe shaft can be used. Therefore, this structure has been widely used in all kinds of housing construction. The deformation of frame shear wall structure is shear bending type. As we all know, the box
6. Many buildings have this kind of function
when building, you should see clearly the building's description
for example, the observatory adds a theologian, the University adds a scientist, the market and the grocery store adds two businessmen, and most of the wonders also have the function of supporting professionals
the increase does not mean that you have it directly, but provides the possibility for you to support these people, each of them Consuming two grains means that every worker in the city must have at least two grains of working ability to have a certain amount of food support professionals. That is to say, the proction capacity of workers working in the white circle is + grain x + work ability x + gold coin x, and the proction capacity of professionals is - grain 2 + function x + gold coin x + corresponding to the historical great man probability 2
as long as there are buildings with more professionals in the city, they can pass through the point After professional personnel's +, # - 92- No. to control the number of professionals, the public does not limit the number of support, but it will not promote the generation of historical greats
some wonders will allow the city to get free professionals (without consuming food). The number of professionals displayed below the professionals can only be determined according to the spectacle built, but can not be freely controlled
historical greats can also choose to join the city Super professional and free
when building, you should see clearly the building's description
for example, the observatory adds a theologian, the University adds a scientist, the market and the grocery store adds two businessmen, and most of the wonders also have the function of supporting professionals
the increase does not mean that you have it directly, but provides the possibility for you to support these people, each of them Consuming two grains means that every worker in the city must have at least two grains of working ability to have a certain amount of food support professionals. That is to say, the proction capacity of workers working in the white circle is + grain x + work ability x + gold coin x, and the proction capacity of professionals is - grain 2 + function x + gold coin x + corresponding to the historical great man probability 2
as long as there are buildings with more professionals in the city, they can pass through the point After professional personnel's +, # - 92- No. to control the number of professionals, the public does not limit the number of support, but it will not promote the generation of historical greats
some wonders will allow the city to get free professionals (without consuming food). The number of professionals displayed below the professionals can only be determined according to the spectacle built, but can not be freely controlled
historical greats can also choose to join the city Super professional and free
7. Zirconium phosphate silver carrying antibacterial agent
inorganic silver antibacterial agent Japanese glass silver carrying antibacterial agent
silver nitrate complex antibacterial agent
silver molybdate antibacterial agent
silver carrying zeolite antibacterial agent
a composite antibacterial agent, which is characterized by the following steps: A. preparation of silver complex: dissolving silver chloride or silver acetate in the mixed solution of sodium thiosulfate and sodium sulfite, At the same time, acetic acid was used to adjust the pH of the solution at 4-5, stirring at 20-40 ℃ for 12-18 hours, in which the molar ratio of S2O32 - to Ag + and SO32 - was 3 ∶ 1 ∶ 1-5 ∶ 1 ∶ 1; b. The silica sol was heated to 25-35 ℃, and the mixed solution prepared in step a was dripped into the silica sol while stirring. After dribbling, the inorganic composite solution was obtained by stirring for 5-10 hours. The volume ratio of silica sol and silver complex solution prepared in step a was 100 ∶ 25-300; c. The mixed solution prepared in step B is kept at 25-35 ℃, and the organic antibacterial agent of cetylpyridinium chloride or cetylpyridinium bromide or 2n acyl isothiazolone is added into the mixed solution while stirring. The weight of cetylpyridinium chloride or cetylpyridinium bromide or 2n acyl isothiazolone added is 0.625% - 6% of the weight of silica sol, After dropping, continue stirring for 1-5 hours to obtain inorganic composite solution of silica sol and silver complex and organic-inorganic composite solution of organic antibacterial agent; D. drying the organic inorganic compound solution prepared by C process at 50-80 degree temperature or spray drying to obtain white powdery compound antibacterial agent.
colorless transparent nano silver solution
Proct Introction
"colorless transparent nano silver solution", this proct is a very stable complex silver solution, and its proction technology is leading in the world. At present, our company can proce three types of colorless transparent nano silver solutions: acidic, neutral and alkaline. If the solution can be used scientifically and reasonably, it has good safety, reliability and extraordinary sterilization function. No matter how long it is used, it will not change color and oxidize. Compared with ordinary colored monomer nano silver solution or ionic nano silver solution, it has more than dozens of times stronger antibacterial property and rapid bactericidal function. In Shanghai SGS, the bacteriostatic test of 10 ppm colorless transparent nano silver solution on Escherichia coli was carried out by using the test method of bacteriostatic performance of dissolution anti (anti) bacteria procts in Appendix C4 of GB 15979-2002. The results showed that the bacterial rection rate was 99.99% within 2 min. Test report No: shfdo060300051an
Proct characteristics
Ag particle size ≤ 0.5nm
the concentration of Ag in conventional procts is below 10000ppm
State: colorless transparent liquid
pH = 7 (neutral)
safety and environmental protection
antibacterial activity: tens of times stronger than monomer or ionic nano silver
antibacterial and bactericidal characteristics: broad spectrum bactericidal, no drug resistance
it has strong oxidation resistance and will not change color no matter how long it is sprayed on white or various cloth or paper
it can be dispersed in water or various organic solvents
application area
proces various kinds of topical fungicides, including various antibacterial gels, lotions, powders and tablets.
it can be added to various waterborne and oily coatings
added to a variety of textile paper procts, especially the procts with special requirements for color change.
inorganic silver antibacterial agent Japanese glass silver carrying antibacterial agent
silver nitrate complex antibacterial agent
silver molybdate antibacterial agent
silver carrying zeolite antibacterial agent
a composite antibacterial agent, which is characterized by the following steps: A. preparation of silver complex: dissolving silver chloride or silver acetate in the mixed solution of sodium thiosulfate and sodium sulfite, At the same time, acetic acid was used to adjust the pH of the solution at 4-5, stirring at 20-40 ℃ for 12-18 hours, in which the molar ratio of S2O32 - to Ag + and SO32 - was 3 ∶ 1 ∶ 1-5 ∶ 1 ∶ 1; b. The silica sol was heated to 25-35 ℃, and the mixed solution prepared in step a was dripped into the silica sol while stirring. After dribbling, the inorganic composite solution was obtained by stirring for 5-10 hours. The volume ratio of silica sol and silver complex solution prepared in step a was 100 ∶ 25-300; c. The mixed solution prepared in step B is kept at 25-35 ℃, and the organic antibacterial agent of cetylpyridinium chloride or cetylpyridinium bromide or 2n acyl isothiazolone is added into the mixed solution while stirring. The weight of cetylpyridinium chloride or cetylpyridinium bromide or 2n acyl isothiazolone added is 0.625% - 6% of the weight of silica sol, After dropping, continue stirring for 1-5 hours to obtain inorganic composite solution of silica sol and silver complex and organic-inorganic composite solution of organic antibacterial agent; D. drying the organic inorganic compound solution prepared by C process at 50-80 degree temperature or spray drying to obtain white powdery compound antibacterial agent.
colorless transparent nano silver solution
Proct Introction
"colorless transparent nano silver solution", this proct is a very stable complex silver solution, and its proction technology is leading in the world. At present, our company can proce three types of colorless transparent nano silver solutions: acidic, neutral and alkaline. If the solution can be used scientifically and reasonably, it has good safety, reliability and extraordinary sterilization function. No matter how long it is used, it will not change color and oxidize. Compared with ordinary colored monomer nano silver solution or ionic nano silver solution, it has more than dozens of times stronger antibacterial property and rapid bactericidal function. In Shanghai SGS, the bacteriostatic test of 10 ppm colorless transparent nano silver solution on Escherichia coli was carried out by using the test method of bacteriostatic performance of dissolution anti (anti) bacteria procts in Appendix C4 of GB 15979-2002. The results showed that the bacterial rection rate was 99.99% within 2 min. Test report No: shfdo060300051an
Proct characteristics
Ag particle size ≤ 0.5nm
the concentration of Ag in conventional procts is below 10000ppm
State: colorless transparent liquid
pH = 7 (neutral)
safety and environmental protection
antibacterial activity: tens of times stronger than monomer or ionic nano silver
antibacterial and bactericidal characteristics: broad spectrum bactericidal, no drug resistance
it has strong oxidation resistance and will not change color no matter how long it is sprayed on white or various cloth or paper
it can be dispersed in water or various organic solvents
application area
proces various kinds of topical fungicides, including various antibacterial gels, lotions, powders and tablets.
it can be added to various waterborne and oily coatings
added to a variety of textile paper procts, especially the procts with special requirements for color change.
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