Bus from Shiqiao to Central Hospital

1. Obvious Ponzi model! Don't be fooled
obvious Ponzi scheme model
obvious Ponzi scheme model
Ponzi scheme is the name of investment fraud in the financial field and the ancestor of pyramid scheme. Many illegal pyramid schemes use this trick to collect money. This kind of deception was "invented" by a speculator named Charles Ponzi. The Ponzi scheme is also known as "robbing the east to pay for the west" and "empty handed White Wolf". In short, it is to use the money of new investors to pay interest and short-term return to old investors, so as to create the illusion of making money and then cheat more investment
the following contents are from the Internet:

cspay capital payment was registered in Hong Kong in 2002, and is the flagship proct of capital venture capital (02324hk), a listed company in Hong Kong. Cspay is the world's leading cross-border mobile payment service provider, providing global users with all-round, all-weather cross-border mobile payment solutions. Create a multi scene and multi field business ecosystem to meet the cross-border use needs of members. Cspay capital payment is composed of a number of traditional financial experts and scholars and a technical elite team with senior background in the field of blockchain. Mainly engaged in the application and development of blockchain technology. It covers: cswallet, CSTO financial platform, cstravel, capital tourism, online mall and other projects. Promote the globalization of digital asset circulation through efficient and secure blockchain technology
what is cspay
zipper, the world's first "digital currency" cross-border payment settlement system
it is the only third-party payment wallet in the world that has connected digital assets with domestic legal currency, and has 30000 merchants in Southeast Asia
the world's only financial company across the stock market + blockchain transaction, led by the listed company "capital venture capital", it is the first to release the digital certificate CSTO, the digital wallet "China wallet", and the cross-border payment blockchain system "capital payment"
capital payment is the only third-party payment company in Asia with payment license in Japan, Korea and Hong Kong
2019 financial payment key year
, CsPay is expected to rely on the one and only ZIPPER
settlement system, merge traditional mature WeChat payment, Alipay payment, Japan payment, and open up the cash collection channel of merchants, BTC, ETH, CSTO line, and have "HUAWEI cloud" escort, so as to realize the overturn of the financial payment market corner. The Internet has become a global financial giant
now it's ready to go. It's a seriously undervalued issue price. The quota is on a first come, first served basis. Seizing the first opportunity and grasping the first mover advantage are concive to an invincible position
value added profit from holding currency
1. The survival period is 10000 to 500000 pieces, and the daily value-added income is 0.1-0.3%
1. The recommender enjoys 50% of the daily value-added income of the direct promoter
2. Current compound interest rolling investment
2. Fixed deposit income
1. The total value-added income from fixed deposit of more than 10000 pieces (30 days, 0.3% per day) is 9% (default currency decting 10%)
2. Fixed deposit of more than 100000 pieces (60 days, 0.3%), The total value-added income is 21% (default currency decting 15%)
3. The total value-added income is 36% (default currency decting 20%). For example, 10000 to 90000 pieces, 100000 to 490000 pieces and more than 500000 pieces can be used< 3. Direct bonus (total amount of fixed deposit)
1. Recommend one person to get one generation,
2. Recommend 10 people to get two generations
3. 10000 → 5% of the first generation. 2% of the second generation
4. 100000 → 8% of the first generation. 3% of the second generation
5. 500000 → 12% of the first generation. 5% of the second generation
note: the percentage is multiplied by the total amount of deposit, such as 500000 times 12% = 60000
4. Team award
1 Ordinary nodal people: 3 people are directly promoted, 100000 coins are deposited, and the daily value-added income of the team is 2%
2. Senior nodal people: 5 people are directly promoted, 2 ordinary nodal people appear in the team, and the daily value-added income of the team is 3%
3. Alliance nodal people: 10 people are recommended, 4 departments appear senior nodal people in the team, and the daily value-added income of the team is 5%
4. Community nodal people: 15 people are directly promoted, There are 8 alliance nodes on the three lines of the team. The team gains 10% value-added income every day and enjoys 2% weighted dividend of global payment income at the same time
5. 51 super contacts in the world: voting. Cspay pays a weighted dividend of 3%
588 CSTO coins for cspay registration, 188 CSTO coins recommended
the company has given 30 million pieces as a gift. So far, it has only announced its launch in October
two large exchanges, okex and fcoin, can download app to login after registration, and register immediately after scanning
obvious Ponzi scheme model
obvious Ponzi scheme model
obvious Ponzi scheme model!

2. According to the law of conservation of energy, input power = output power + friction loss, while friction loss depends on material (worm turbine) friction coefficient, lubrication condition, worm helix angle, meshing tooth profile roughness, etc. Preliminary judgment, such a large rection ratio of 240:1, generally two-stage deceleration, and friction loss is quite large, transmission efficiency is low η Lower
because power (kw) = torque (nm) × Speed (RPM) / 9549, so the output torque (nm) = 9549 x η X input power (kw) / speed (RPM).
the specific numerical calculation should be supplemented.

3. When the lead angle is less than the friction angle, the mechanism is self-locking

friction angle = arctan μ μ It is friction factor)

friction factor is related to contact line, lubricating oil, sliding speed, material matching, processing, installation accuracy, heat treatment, etc., which is difficult to determine, only recommended value

you can refer to the manual, for example, when the sliding speed is 0.1m/s, the friction factor is 0.08, and the friction angle is 4 ° 34'

4. Fan 20b, fan 27

6.

ETL is the abbreviation of English extract transform load, which is used to describe the process of extracting, transforming and loading data from the source to the destination. ETL is commonly used in data warehouse, but its object is not limited to data warehouse

Generally, ETL or ELT (extract load transform) are used in the process described by ETL. Generally, the larger the amount of data, the more complex the conversion logic, and the database with strong computing power at the destination, the more apt is used to make use of the parallel processing power of the database at the destination

extended data

ETL has several characteristics:

one is data synchronization, which is not a one-time data pull, it is a regular activity, according to a fixed cycle, and even now some people put forward the concept of real-time ETL

The second is the amount of data, which is generally huge. It is worth splitting the data flow process into e, t and L<

source: Internet ETL

7. ETL consideration

as a data warehouse system, ETL is a key link. ETL is a data integration solution when it's big, and a tool when it's small. Looking back over the past few years, there have been a lot of work on data migration and transformation. But the work is basically a one-time work or a small amount of data, use access, DTS or write a small program to do it. But in the data warehouse system, ETL has risen to a certain theoretical level, which is different from the original use of small tools. What's the difference? You can see from the name that people have divided the process of data inversion into three steps. E, t and l represent extraction, conversion and loading respectively

in fact, ETL process is the process of data flow, which flows from different data sources to different target data. But in the data warehouse, ETL has several characteristics. One is data synchronization. It is not a one-time pull after pouring data. It is a regular activity and runs according to a fixed cycle. Even now, some people have put forward the concept of real-time ETL. The second is the amount of data, which is generally huge. It is worth splitting the data flow process into e, t and L

there are many mature tools that provide ETL functions, such as Datastage, powermart, and so on. From the perspective of application, the ETL process is not very complicated. These tools bring great convenience to data warehouse engineering, especially the convenience of development and maintenance. But on the other hand, developers tend to get lost in these tools. For example, VB is a very simple language, and is also a very easy to use programming tool, especially fast to start, but how many real VB masters? Microsoft procts usually have a principle of "treating users as fools". Under this principle, Microsoft's procts are really easy to use, but for developers, if you also treat yourself as fools, it's really silly. ETL tools are the same. These tools provide us with graphical interfaces, so that we can focus on the rules to improve the development efficiency. From the use effect, it is true that using these tools can build a job very quickly to process a certain data, but from the overall point of view, it is not necessarily that its overall efficiency will be much higher. The main problem is not tools, but designers and developers. They are lost in the tools, not to explore the essence of ETL

it can be said that these tools have been used for such a long time and in so many projects and environments, it must have its success, and it must reflect the essence of ETL. If we don't look at the ideas behind these tools through the simple use of them, what we finally make is indivial jobs, and there is still a huge workload to integrate them. As we all know, "the combination of theory and practice", if we surpass in a field, we must reach a certain height on the theoretical level

8. (1) various databases: the creation time field, the modification time field or the last modification time field of a table
(2) SQL Server: can be used to find auto increment fields or timestamps
(3) Oracle: the search sequence field is also self increasing
(4) if you can't find the above fields, you can analyze the actual business data, such as whether various numbers are self incrementing without repetition
the data of last month will not change, but the change is only in this month, so the data of this month is incremental data
(1) for data tables with incremental change records, split them (insert, update and delete) to process data synchronously
(2) for incremental data:
A: the lookup component delete can implement insert and update, and only the outer join method can be used for delete
b: the outer join and null keyword methods can implement insert, update and delete, but it consumes performance when the amount of data is large
C: the slow changing dimension component of SCD can easily implement insert and update, while delete can only use the outer join method
Two: ETL no incremental data: if you can't find incremental data, you can only delete all of them first and then extract all of them
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