Central Asia 02btc
public key system: corresponds to a public key and a private key, keeps the private key in the application and publishes the public key. When Party A transmits information to Party B, it can use Party A's private key to encrypt the information, and Party B can use Party A's public key to decrypt the information, so as to ensure that the third party cannot impersonate Party A to send the information; At the same time, when Party A transmits information to Party B, it is encrypted with Party B's public key and sent to Party B, and then Party B decrypts it with his own private key, so as to ensure that the third party cannot eavesdrop on the communication between the two people. RSA is the most common public key system, but the lliptic curve digital signature algorithm is used in bitcoin protocol. What's the difference between cash and bank account? Bitcoin is an electronic currency in BTC. In this article, it is also used to refer to the whole bitcoin system. Like opening an account in a bank, the corresponding concept in bitcoin is address. Everyone can have one or more bitcoin addresses, which are used to pay and collect money. Each address is a string that starts with 1. For example, I have two bitcoin accounts, and. A bitcoin account is uniquely determined by a pair of public key and private key. To save the account, you only need to save the private key file. Unlike bank accounts, banks keep all transaction records and maintain the book balance of each account, while bitcoin's transaction records are jointly maintained by the whole P2P network through a pre agreed protocol. How much money is in my account address? Although the current account balance can be seen by bitcoin software, unlike banks, there is no place to maintain the book balance of each address. It can only calculate the account balance in real time through all historical transactions. How do I pay? When I pay from address a to address B of the other party, the payment amount is e. at this time, both parties will announce the transaction information to each network node, telling address a to pay to address B, and the payment amount is e. In order to prevent the third party from forging the transaction information, the transaction information will be encrypted with the private key of address A. at this time, the network node receiving the transaction information can use the public key of address a to verify that the transaction information is indeed sent by address a. Of course, trading software will help us do these things, we just need to input the relevant parameters in the software. What will the network node do after receiving the transaction information? This is the most important part of the bitcoin system, which needs to be elaborated. For the sake of simplicity, only bitcoin protocol has been implemented. In the current version, each network node will save all transaction information synchronously. There are two kinds of transaction information in history, one is & quot; Verified & quot; The transaction information, that is, the verified transaction information, is stored in a series of "blocks". Each & quot; block" Is the previous & quot; bock" The ID of each block is the hash code of the hash code of the block and the new transaction information (see an actual block). The other category refers to those who also & quot; Unverified & quot; The transaction information just paid above belongs to this category. When a network node receives new unverified transaction information (possibly more than one), it can calculate the book balance of each address at that time because the node keeps all the transaction information in history, so it can calculate whether the transaction information is valid, that is, whether there is enough balance in the payment account. After eliminating the invalid transaction information, it first takes out the last & quot; block" Then, the unverified transaction information is combined with the ID, and a verification code is added to form a new "block". It needs a lot of calculation to build a new block, because it needs to calculate the verification code, so that the above combination becomes a block, that is, the first several bits of the hash code of the block are 1. At present, the first 13 bits need to be 1 (generally, the specific method is uncertain), which means that if the block is generated by enumeration method, the average number of enumerations is 16 ^ 13. Using CPU resources to generate a block is called "gold mining", because the proction of the block will get a certain reward, and the reward information has been included in the block. When a network node generates a new block, it will broadcast to other network nodes. However, this network block may not be accepted by the network, because it is possible that other network nodes have proced the block earlier. Only the earliest block or the block with the largest number of subsequent blocks is valid, and the remaining blocks are no longer used as the initial blocks of the next block. How does the other party confirm that the payment is successful? When the payment information is distributed to the network node, the network node begins to calculate whether the transaction is valid (that is, whether the account balance is enough to pay), and attempts to generate blocks containing the transaction information. When six blocks (one direct block and five subsequent blocks) contain the transaction information, the transaction information is considered "verified", so that the transaction is formally confirmed, and the other party can confirm the successful payment. A possible problem is that I will pay the balance of address a to address B, and at the same time pay to address C. If I only verify that the single comparison transaction is valid. At this point, my way of cheating is to generate six blocks including B to B and six blocks including C to C before the truth is revealed. Because I need a very long CPU time to generate a block, compared with the whole network, the probability of my cheating success is very small. What is the motivation of network nodes to proce blocks? As can be seen from the above description, in order to make the transaction information effective, the network node needs to generate 1 and 5 subsequent blocks to contain the transaction information, and such block generation is very CPU intensive. How to let other network nodes help to proce blocks as soon as possible? The answer is very simple. The agreement stipulates that BTC will be rewarded for the address where the block is proced, as well as the Commission promised by both parties. At present, the reward for procing a block is 50btc, which will be halved every four years in the future. For example, the reward will be 25btc from 2013 to 2016. Is the transaction anonymous? Yes, and No. All bitcoin transactions are visible. We can check all transaction records of each account, such as mine. But what's different from the banking monetary system is that everyone's account itself is anonymous, and everyone can open many accounts. In general, anonymity is not as good as it claims. But bitcoin has another advantage in doing black market trading: it can't be frozen. Even if the police trace a bitcoin address, there is nothing they can do unless they trace the computer used by the exchange based on the Internet address. How to ensure that bitcoin does not depreciate? Generally speaking, in the case of equivalent trading activities, the value of money is inversely proportional to the amount of money issued. Unlike the traditional money market, the central bank can determine the amount of money issued. Bitcoin does not have a central issuing institution. Only by procing blocks can we get a certain amount of BTC currency. Therefore, bitcoin's new amount of money depends on: 1. The speed of procing blocks: bitcoin's agreement stipulates that the difficulty of procing blocks is fixed at an average of 2016 every two weeks, about 10 minutes. Moore's law of doubling CPU speed every 18 months will not speed up the proction of block. 2. The number of rewards for block proction: at present, 50 BTC is awarded for each block proced, which is halved every four years. In 2013, 25 BTC is awarded, and in 2017, 12.5 BTC is awarded. Considering the above two factors, bitcoin's currency issuing speed is not controlled by any single node in the network. Its protocol makes the currency stock known in advance, and the maximum stock is only 21 million BTC
In instrialized countries, a major pipeline network has been built to transport crude oil to refineries at suitable locations inland, and the pipeline network is also used to transport petroleum procts from refineries to consumption centers. The oil pipeline is a large-diameter pipe, which can transport a large amount of oil. The annual transportation capacity can reach tens of millions of tons. Along the pipeline, pumping stations are built every 60-100 kilometers to maintain the pressure of oil in the transportation. The route of oil transportation in pipeline from proction plant to refinery. The velocity is 2 m / s. Pipeline transportation means that in general, there will be no serious oil leakage accident. In fact, once the pipeline is damaged e to accident or man-made damage, the pump can be stopped, which can effectively limit the pollution. However, if the pipeline ownership country does not implement effective supervision on the pipeline, things may become particularly serious. Oil contains acidic gases (CO2 and H2S), which are more or less corrosive, so the pipeline will be damaged from the inside, and if it is not replaced in time, the pipeline will leak
Basically speaking, the pipeline construction needs to be negotiated according to geopolitics, and the dialogue between the pipeline crossing countries proces a kind of cooperation agreement in order to solve disputes.. The construction of major pipelines across many countries needs to go through fierce negotiations. After these negotiations, the geopolitics of energy demand is based on politics, and the comprehensive analysis of geography, history and social science is carried out on different scales (ranging from one country to international analysis). It analyzes and studies the significance of geographical location, politics, economy and strategy. The meaning of geography here is the relationship between geographical location, scope, function and region and reserves. And politics. For example, let's look at the problem of new oil resources in Central Asia - what happened there, what happened around the Caspian Sea: a large amount of oil here is transported to the East, to China, to provide reliable supply for users with increasing energy demand, or to the southeast, across Afghanistan and Pakistan; To the southwest, across Iran, which is the most economically significant channel; Or to the northwest, to Russia, where Russia has control over the European gas pipeline.. This ensures control of all final destinations. The Baltic pipeline system (BPS) is a Russian transportation system operated by Transnet, an oil pipeline company. BPS transports oil from tiaman Pechora region, West Siberia region and Urals Volga River region to primorsk oil terminal in the east of Gulf of Finland. It consists of a variety of facilities that operate in a unified way to transport petroleum procts from one place to anotherthe control of oil and gas routes: a review of geopolitical disputes. The Georgia pipeline to the West has not been damaged, but it remains vulnerable. It's not just a fight between Russia and Georgia. Source: economist, August 2008., The route of the pipeline was formulated in 2008. It is an oil pipeline extending to the West with very poor export conditions. On August 5, 2008, a pumping station on the Baku Tbilisi Ceyhan (BTC) pipeline, 1100 miles (1760 km) east of Turkey, was set on fire. Turkey's Kurdish separatists claimed responsibility. The pipeline delivers 850000 barrels of crude oil from the Caspian Sea to the western market every day. The closure of the pipeline has led to the once falling oil price rising again. BP has invested $44 billion in the BTC pipeline and still controls the pipeline. BP bravely faces everything and thinks that the closure of the pipeline is only temporary. But two days later, war broke out between Georgia and Russia, and the pumping station was ablaze for several days
"the fourth Corridor project will rece Europe's dependence on Russian natural gas and transport natural gas from the Caspian Sea to Europe."
Another BP pipeline, Baku supsa, once transported crude oil to the Black Sea coast of Georgia (now blocked by Russian warships), which has been reopened but forced to close. On August 12, 2008, even though the war was over, BP stopped delivering natural gas to Baku Erzurum gas pipeline. The only pipeline from Azerjan, which has recently been running at full capacity, passes through Russia to the port of novorossisk. For the past 10 years, Georgia has been a reliable country with access to a number of new pipelines, safely and effectively controlled by several Western oil companies, which can pass through Russia and Iran. In fact, in the past few weeks, the pipeline has become the object of ridicule, but it is not over. Georgia points out that its energy structure has survived the war: its pipelines have not been blown up. Russia is willing to maintain good relations with Azerjan and Turkey. It is cautious that this is not an oil war. However, the crisis - including the crisis dispute between Armenian and Azerjani over Armenian - has been growing. The South Caucasus region is considered as the replacement point of the so-called "fourth corridor" project, which is an important strategic location that Western strategists dream of ending Europe's dependence on Russian natural gas and transporting natural gas from the Caspian Sea to the European market. In this "blueprint", the highlight is the Nabucco pipeline, which is designed to ship natural gas from the Caspian Sea to Europe in 2013. This project is in trouble because it is not supported by Europe. The competitor Russia's plan is called "fourth stream". In fact, in Turkmenistan, There are no large western energy companies operating, and one of the foreign policy legislative proposals signed by then Russian President Dmitry Medvedev has been submitted to Azerjan and Turkmenistan, where leaders are required to sell gas to Russiapipeline operation. When laying pipelines, the construction projects not only include the work of laying pipelines by the government, but also the construction of pumping stations and compression stations, which also include the installation of many field equipment, which can be operated remotely. The field device is instrumented and consists of data acquisition unit and communication system. Field instruments include flow, pressure, thermometer and transmitter, and also need some equipment to measure relevant data. These instruments are installed in some special places along the pipeline, such as transmission station, pump station (fluid pipeline) or compressor station (gas pipeline), and control valve station. Because the information measured by these field instruments is collected in a regional remote control terminal unit (RTU), where the field data is transmitted to the central control area in real time by communication system. These communication systems can be satellite channel, microwave communication or portable telephone. The central control room sends out instructions to remotely control and operate the pipeline. In this control center, all data related to field survey are transmitted to a central database. These data are received from multiple RTU receivers along the pipeline. It is common to see RTUs installed at each workstation along the pipeline
the data acquisition and monitoring control system (SCADA) in the main control room receives all field information and transmits it to the pipeline operator through a set of screen or SCADA man-machine interface, which can display the operation status of the pipeline. The operator can remotely control the hydrodynamic conditions of the pipeline and send operation instructions to the field through SCADA (open or close the valve, open or close the compressor or pump, change the set point, etc.). In order to optimize and ensure the operation of these supervisors, some pipeline companies are using a software tool called "advanced pipeline applications", which is installed on the top of SCADA and can add leak detection, leak location, measurement tracking, pig tracking, component tracking, calibration modeling, pre modeling, and other functions Operator training and other functions
real case sharing! Let's take a warning
the victim, Ms. Liu: at the beginning, a salesman who claimed to be a teacher assistant called Ms. Liu and said that he was a salesman of Central Asia currency investment platform. In order to let more investors seize the profits, the teacher specially set up an investment exchange group and invited Ms. Liu to join the stock exchange group. At first, Ms. Liu said that she didn't understand, so don't call her again, But in the face of the platform assistant every day out of the profit screenshot and let Ms. Liu heart, in the live room of this platform to listen to the teacher's lecture
after a period of communication, Ms. Liu, who thought she had learned how to make money, wanted to follow the teacher. At this time, the teacher assistant said that it would take a lot of money to make the investment. She asked Ms. Liu how much money she could put in. Ms. Liu said she had 250000 on hand to invest, so with the help of the teacher assistant, Ms. Liu opened an account on the platform, A week later, I put 250000 into it<
after almost a month's investment, Ms. Liu found that she had no profit and lost part of her money, so she wanted to take out the money. However, she was obstructed by the assistant. She said that the teacher had an important arrangement strategy next week. If she kept up with the strategy, the expected income would be 120%. When she recovered Ms. Liu's heart, she invested another 250000 yuan
I didn't expect that the good profit was not made, all the funds I invested burst, and I had nothing. The teacher didn't reply to Ms. Liu's information, so she was directly blackmailed
Hong Kong xiongguo group, formerly known as Singapore Delong construction engineering company, has become an international comprehensive enterprise group after more than 30 years of business development. The group moved to Hongkong in early 90, renamed Hongkong Xiong group company, and the group's 11 entities, 3 processing enterprises, 6 construction enterprises, 2 mining enterprises and 2 design institutes, and were divided into Hongkong, Canada, Australia, Russia, South Africa, Indonesia, Singapore, China Taiwan, Chinese mainland and other countries and regions. At present, the group has 15860 employees, including 10 postdoctoral, 28 doctoral and 103 master's degrees. It employs senior architects from former I.M. Pei architectural design firm, senior designers from German BTC Design Institute and senior designers from Hong Kong Architects Association
founded in Singapore, based in Hong Kong and radiating all over the world, xiongguo group is a multinational enterprise based in Hong Kong. The business scope includes property development and investment, real estate agency and management, mining and related services, hotel, energy, infrastructure, finance and investment, building materials and media, etc. China has set up several holding companies in Chinese mainland. The instry involves various instries: Jiangsu Xiong Guo Construction Engineering Co., Ltd., Shanghai LS Stone Co., Ltd., Shanghai Tongji University, Xiong Hui building design office, Wuxi Jincheng curtain wall company, Beijing shsixiong steel construction heavy instry Co., Ltd., Jiangsu Xiong Guo Jing Sheng stone company, and far hung international trade (China) company.
Enterprise Group is the highest decision-making and management organization, each professional company operates independently and implements technology and management collectivization. Hong Kong xiongguo Group Co., Ltd. has always been managing enterprises with xiongguo enterprise management law and managing quality with xiongguo quality management law, integrating the two into enterprise culture and enterprise thought, with scientific management, standardized quality, standardized system and diversified operation
Jiangsu xiongguo construction engineering company is a wholly-owned company under xiongguo group. Formerly known as Jiangsu xiongguo Decoration Engineering Co., Ltd. The company has been reorganized into a new group company, including decoration company, curtain wall company, equipment installation company, steel structure company, metal door and window company, stone company and project investment management company. It is engaged in construction engineering and related business, real estate development, investment management, etc. Business scope covers finance, insurance, telecommunications, venues, hotels and other instries
The nearest subway station to Huaxia future children's Art Center is Tianta subway station of Metro Line 3. After getting off the subway, walk to Tianta station and take bus NO.686 to Huaxia future station. The bus line is NO.686, about 2.0KM long.
1. Walk about 400m from Tianta station to Tianta station
2. Take bus NO.686, after 3 stops, to Huaxia future station 675 Road, 628 Road, 658 Road)
3. Walk about 110 meters to Huaxia future children's Art Center
Huaxia future children's Art Center
address: Huaxia future block a, No. 3, middle Lake Road, North Ring Road, sports college
if you have any questions, please ask, I hope I can help you
Shenzhen has always been a city with rapid development, and many people want to enter Shenzhen for development. Many people think that Shenzhen can have a better and better development
In fact, Shenzhen can be more advanced and catch up with the development trend of the times, making itself more and more advanced. Guangdong supports Shenzhen to carry out the digital RMB pilot project. Why has Shenzhen always been the pioneer of the pilot project? I think there are three main reasons: first, Shenzhen is very inclusive in fact, in my opinion, the reason why Shenzhen has always been the pioneer of the pilot project is that Shenzhen is able to have a relatively strong inclusiveness. Shenzhen is able to accommodate all kinds of things, and also be able to accommodate all kinds of rivers. It can let many different places exist in this city, and it can let many different people live in it. Therefore, Shenzhen is able to have a more inclusive, but also able to accommodate more people and things, so that the pilot can have a better effect. Therefore, Shenzhen will be the first place for the pilot, so as to have better pilot effect{ RRRRR} that's my opinion. Do you have any ideas