Major digital currencies
Publish: 2021-03-27 05:37:21
1.
1. Bithumb
bithumb is the largest digital currency exchange in South Korea and the top ten in the world in terms of trading volume. Its daily trading volume exceeds 13000 bitcoins, accounting for about 10% of global bitcoin trading volume. It promises to provide the lowest handling charge in the world. Bithumb accounts for 75.7% of South Korea's bitcoin market, 10% of the global bitcoin market, and 50% of South Korea's Ethereum market
Bitmex is established in the Republic of Seychelles as a leading leverage trading platform. It can operate cryptocurrency derivatives trading as high as 100 times leverage, and also provide high leverage for other digital currency procts. Bitmex offers more than a dozen futures and swap procts. Bitcoin is one of the most active trading varieties, which can be divided into three types: xbtz17 (bitcoin / USD futures), xbjz17 (bitcoin / yen futures) and xbtusd (bitcoin / USD perpetual swap)
to register a bitmex account, just fill in the email, password and country. The name can be left blank. Bitmex does not accept the recharge and withdrawal of legal currency, so it does not have to follow the bank's KYC / AML requirements to obtain the user's personal information
Okex
3, okex
okex mainly provides global users with spot and derivative trading services of digital assets such as bitcoin, lightcoin and ethereal currency, which is subordinate to okex Technology Company Limited. Since 2014, we have been committed to providing bitcoin, lightcoin, ethercoin and other digital asset currency and derivatives trading services to global users, adopting advanced technologies such as GSLB, distributed server cluster, distributed storage, high-speed memory trading engine with multi machine mutual backup, cold wallet, hot money package with private key offline, etc
As one of the most concerned companies in the international blockchain instry, Qian'an is jointly founded by Zhao CHANGPENG, former blockchain CTO, a well-known blockchain company, and He Yi, former vice president of science and technology, to provide users with more secure and convenient digital currency exchange services and aggregate global high-quality digital currencies, It is committed to building a world-class blockchain asset trading platform. Only 50 days after its launch, the company's users have covered more than 180 countries around the world. This is the first time that the company has disclosed its financing information
5. Hotcoin is one of the three major exchanges in China. Headquartered in Beijing, it also has many exchanges, including domestic stations, international stations, quantitative trading, etc. hotcoin is a domestic station. Since its establishment in 2013, the accumulated trading volume of hotcoin has exceeded $100 billion, once becoming the largest digital asset trading platform in the world, It occupies 50% of the global share of digital asset transactions, and has been invested by Zhenge fund and Sequoia Capital
fire coin group has invested in more than 10 upstream and downstream enterprises, and has completed the establishment of compliance service teams in Singapore, South Korea, Hong Kong, Thailand, Australia, Canada, Brazil, Britain and other countries and regions, providing secure and reliable digital asset trading and asset management services for millions of users in more than 130 countries
6, bibox
bibox is the world's first artificial intelligence digital asset trading platform, which innovatively realizes transaction security, platform stability and operation convenience; Financial derivatives services are well-known in the instry. The platform not only provides spot trading, but also provides financing, currency financing and contract trading business. Investors can carry out long short two-way operation. They can obtain the income from the rise in the price of digital assets by buying long and obtain the income from the fall in the price of digital assets by selling short, which is convenient for traders to invest and hedge
Hitbtc
7, hitbtc
hitbtc was established in 2013 and obtained 6 million euro venture capital. Headquartered in Europe, it is a bitcoin trading platform in the UK, supporting the current mainstream encrypted digital currency portfolio trading, including BCC / BTC, ETH / BTC, XmR / BTC, LTC / BTC, EOS / BTC, EOS / eth, etc. at present, there are 762 trading pairs. Hitbtc is operated by hit Solutions Limited in Hong Kong and has a dedicated support and communications office in Santiago, Chile
Digifinex
digifinex is a block chain Digital Asset Exchange registered in Seychelles, which mainly provides currency trading services of bitcoin, Ethereum, lightcoin and other digital assets for global users. According to non trumpet data, there are 103 platform trading pairs at present. Digifinex is founded by blockchain and digital asset enthusiasts, with core teams from Xunlei, Tencent and Internet. It is operated by digifnex limited, which is registered in Seychelles, and its current operation center is located in Singapore
ZB network is a global digital currency exchange. Currently, there are 168 platform trading pairs, which support OTC and spot trading. At present, it has obtained the exchange license of Thailand and Du, and has set up operation centers in Switzerland, Canada, the United States, Bangkok, Du and other places. ZB focuses on providing global customers with safe, convenient and compliant blockchain asset trading services
10, coin win international station
coin win is a global digital asset trading platform set up by Chinese state-owned enterprises in Hong Kong. It adopts bank level security technologies such as cold storage, SSL and multiple encryption to ensure the security and stability of virtual currency transactions. It mainly provides transaction services of digital assets such as ether currency and HSR for global users, and is subordinate to citicash Hong Kong Investment Limited. Currently, there are 51 platform trading pairs, which support OTC and spot trading
2. 2020 is the first year of proction rection. Everyone turns to BTC, BCH, BSV and other currencies. However, you forget eth. As the king of the public chain, ETH will usher in the big upgrade of 2.0 super version in 2020, switching from the pow mechanism to the POS mechanism. In addition, it will face proction rection in March next year, and its circulation will be reced by 10 times. Its impact is no less than that of bitcoin proction. Since the beginning of the year, the trading volume of eth has grown explosively, and the institutional capital has poured in to preempt the layout. However, the current price of eth is only 260 US dollars. With many super favorable blessings, the market expects eth to usher in a super bull market< In theory, X2
2. The circulation of next year will decrease 10 times. In theory, X2
3. The current price of eth is 230x4 = 920 US dollars (upgrade + expected price after proction rection)
ring this period, the return comparison between holding spot and ETF fund is as follows:
1. Holding spot makes 4 times of profit
2. Holding Ethereum ETF fund launched by bitoffer, the income starts 12 times, Up to 30 times (intelligent position adjustment + fund compound interest calculation)
there is no doubt that Ethereum ETF is the best investment choice!
2. The circulation of next year will decrease 10 times. In theory, X2
3. The current price of eth is 230x4 = 920 US dollars (upgrade + expected price after proction rection)
ring this period, the return comparison between holding spot and ETF fund is as follows:
1. Holding spot makes 4 times of profit
2. Holding Ethereum ETF fund launched by bitoffer, the income starts 12 times, Up to 30 times (intelligent position adjustment + fund compound interest calculation)
there is no doubt that Ethereum ETF is the best investment choice!
3. "Digital currency is an alternative currency in the form of electronic currency, which can be used for real goods and services transactions. Digital currency has the main characteristics of network packets. This kind of data package is composed of data code and identification code. The data code is the content to be transmitted, while the identification code indicates where the data package comes from and goes
definition of digital currency:
the alternative currency in the form of electronic currency belongs to digiccy
digital currency is a kind of unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of specific virtual communities. The European Banking authority defines virtual currency as the digital expression of value, which is not issued by the central bank or authorities, nor linked with legal currency, but because it is accepted by the public, it can be used as a means of payment, and can also be transferred, stored or traded electronically
digital currency can be considered as a virtual currency based on node network and digital encryption algorithm
the core characteristics of digital currency are mainly reflected in three aspects: first, e to some open algorithms, digital currency has no issuing subject, so no one or institution can control its issuing; ② Because the number of algorithm solutions is fixed, the total amount of digital currency is fixed, which fundamentally eliminates the possibility of inflation caused by the overuse of virtual currency; ③ Because the transaction process needs the approval of each node in the network, the transaction process of digital currency is safe enough
the emergence of bitcoin poses a great challenge to the existing monetary system. Although it belongs to the generalized virtual currency, it is essentially different from the virtual currency issued by network enterprises, so it is called digital currency. This paper compares digital currency with electronic currency and virtual currency from the aspects of issuing subject, scope of application, issuing quantity, storage form, circulation mode, credit guarantee, transaction cost and transaction security.
definition of digital currency:
the alternative currency in the form of electronic currency belongs to digiccy
digital currency is a kind of unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of specific virtual communities. The European Banking authority defines virtual currency as the digital expression of value, which is not issued by the central bank or authorities, nor linked with legal currency, but because it is accepted by the public, it can be used as a means of payment, and can also be transferred, stored or traded electronically
digital currency can be considered as a virtual currency based on node network and digital encryption algorithm
the core characteristics of digital currency are mainly reflected in three aspects: first, e to some open algorithms, digital currency has no issuing subject, so no one or institution can control its issuing; ② Because the number of algorithm solutions is fixed, the total amount of digital currency is fixed, which fundamentally eliminates the possibility of inflation caused by the overuse of virtual currency; ③ Because the transaction process needs the approval of each node in the network, the transaction process of digital currency is safe enough
the emergence of bitcoin poses a great challenge to the existing monetary system. Although it belongs to the generalized virtual currency, it is essentially different from the virtual currency issued by network enterprises, so it is called digital currency. This paper compares digital currency with electronic currency and virtual currency from the aspects of issuing subject, scope of application, issuing quantity, storage form, circulation mode, credit guarantee, transaction cost and transaction security.
4. I can't give you an accurate answer to this question because digital currency covers too many aspects. There is also the possibility that many new cryptocurrencies are born or die every day. Now the world's more well-known digital currencies are bitcoin, dogcoin, Leyte coin, bitstock, reborn coin, Yuanbao coin, Diandian coin and so on. It is said that Ecuador, a small South American country, recently created its own official cryptocurrency
according to incomplete statistics, more than 200 counterfeit coins have been proced since 2014, and more than 100 have survived. The life cycle of Shanzhai coins is generally about 2
-
3 months. Because the purpose of some Shanzhai coins is to earn money without any innovation. When the price is high enough, the makers will sell a lot to cash out. Without the support of the makers, this kind of counterfeit money will eventually die
for more information about cryptocurrency, you can visit bitcoin home.
according to incomplete statistics, more than 200 counterfeit coins have been proced since 2014, and more than 100 have survived. The life cycle of Shanzhai coins is generally about 2
-
3 months. Because the purpose of some Shanzhai coins is to earn money without any innovation. When the price is high enough, the makers will sell a lot to cash out. Without the support of the makers, this kind of counterfeit money will eventually die
for more information about cryptocurrency, you can visit bitcoin home.
5. If you want to invest in digital currency, it is recommended to use Chinese currency. In the group chat of tens of thousands of people, you can send these questions in real time. I believe it will be faster and more convenient to know the answers than on the Internet. Hope to help you.
6. The overall framework of e-government issued by the state information leading office is of great significance to the promotion of the national overall e-government project. The introction of the document points out the direction for the further implementation of the e-government project. The document especially emphasizes the important role of the exchange and sharing of government information resources, It is clear that the construction of information resource exchange and sharing mechanism is an important support system for the overall e-government project
from the construction experience of a large number of information exchange and sharing projects, it is very important to determine the objectives of the information exchange and sharing project. All parties of the project construction should first reach a consensus on the following key issues of success:
· the problem of sharing and exchanging information service objects
· the service mode that different service objects should adopt
· storage and unified management of shared information
· scientific analysis of the sources of information
· related information technology standards and management standards
· principles for the design and construction of information exchange and sharing platform
these problems are the core problems to solve the information exchange and sharing, and are the practical problems existing in the project implementation. No matter how different the technical methods to solve the information exchange and sharing are, the real solution of these problems is the foundation and guarantee of the project construction< The significance of e-government project construction lies in that it can play a supporting role in various functions of the government, and use it technology to help the government improve work efficiency and promote the transformation of government functions. Therefore, to invest in the construction of a large-scale e-government project, first of all, it is necessary to determine its service objectives and the system construction's & quot; Theme Application & quot< br />
" The Eleventh Five Year Plan & quot; During this period, the party and the state made it clear that the establishment of & quot; Harmonious Society & quot; According to the characteristics of their own work functions, governments at all levels and functional organizations at all levels have determined the & quot; The Eleventh Five Year Plan & quot; Planning, on the premise of the overall goal, determines the goal system of each work. E-government project construction & quot; Theme application;, It is to determine the service goal of e-government project, and combine the construction goal of e-government project with the establishment of & quot; Harmonious Society & quot; It is an important part of the overall development goal of the government to link up the overall planning goal of e-government closely and clarify the overall development goal of e-government. The construction of information exchange and sharing mechanism must also face a challenge; Theme application;, A project that is divorced from the theme of service is a project without vitality
China's overall construction of a new socialist countryside, Beijing's floating population management, etc., are the key problems directly faced by different levels of government agencies. The theme application of e-government project should only focus on the most urgent problems to be solved by the government and the theme of the government's strategic objectives to carry out the construction of data exchange and sharing mechanism< The construction of information exchange and sharing mechanism is the long-term task of the overall construction of e-government, which keeps pace with the development of national economy and the process of the overall government function reform. The specific information exchange and sharing project construction must conform to the principle of practical priority and adapt to the future development. First of all, it is necessary to determine the construction objectives of specific projects, which must be established in the government agencies; Improve administrative efficiency and public service quality & quot; On the basis of the business objectives of the government, it engineering projects need to focus on the contribution to the current government function transformation project; In addition, we must fully respect the basis of practical work and the current administrative functions of the government, drive the engineering construction of the information exchange and sharing mechanism, transform the government information department into a specific actual business department, and clarify the viewpoint that the information department serves the actual business department of the government, The actual business work of the government should be closely linked with the construction of information resource sharing; According to the actual situation of different government agencies and local governments, the boundary scope of project construction is defined, the principle of project construction is determined, and the construction of long-term information sharing mechanism is well combined with the goal of single project construction; Technological innovation is prior to collaborative innovation of government business. The construction of data exchange and sharing platform needs to consider the needs of future business expansion and intensive engineering construction
3. Multi dimensional understanding of requirements
the guiding ideology of business information requirements analysis is three-dimensional system model. This is because only from the perspective of information resources, without in-depth study of the actual operation of government departments, it is difficult to do a good job in the information interaction and sharing project. We believe that government work is driven by the joint action and coordination of business management, execution driven and organizational management. Three dimensional system model is as follows:
figure: three dimensional system model
three dimensional system model composition: first, business management level, including key business system, support business system and auxiliary support system; Second, business driven mode, including target decision-making, task assignment, task decomposition, work organization, implementation and execution supervision; Three organizational forms, including the core decision-making level, work organization and implementation level and implementation level. Business information runs through the whole process of target management. Information system construction must meet the actual needs of different dimensions in order to truly reflect the strong supporting role of information resources for business
4. Information planning
the core of information planning is to establish a data supply chain for theme oriented applications, which needs to solve the problems of sharing and exchanging information, how to obtain from there, how to manage effectively, how to provide services to business systems, and form a clear chain of data proction, data processing and management, and data services. Information planning is built on the basis of data analysis, is a deeper analysis of exchange and sharing of information, is the top-level design of technology to achieve exchange and sharing of information
based on the guidance of information engineering methodology (IEM), using engineering method to plan information for information exchange and sharing is to follow certain method steps, follow certain standards and specifications, use effective tools to analyze information demand and data flow of various functional areas, and formulate basic standards for information resource management, Establish the information system framework of sharing domain and each functional domain
generally speaking, the content of information includes system analysis oriented to functional domain, data flow model, and topic library conceptual model oriented to shared domain. The specific content of information planning varies with the elements of a specific project. Information resource planning of information exchange and sharing construction emphasizes the close combination of information sharing requirement analysis and system modeling -- requirement analysis is the preparation of system modeling, and system modeling is the qualitative and standardized expression of information exchange and sharing construction. In the information planning of information exchange and sharing construction, we first determine the strategic construction objectives of specific projects, determine the work objectives of collaborative government agencies around the strategic objectives, and determine the work objectives according to the tasks of different organizations; Functional areas & quot;; Then, the business flow and data flow of each functional domain are investigated and analyzed, and the data flow model and data model for information exchange and sharing are established as the data basis for the construction of the whole information exchange and sharing platform
5. Shared data storage management
diagram data center database type division
Metadatabase
stores data describing data and its environment in Metadatabase
business rule base
abstracts business as a series of rules and stores them in rule database
business information base
stores important information obtained from front-end nodes in business information base
platform log library
a series of information generated in the process of platform data exchange is put in the platform log library< 1. Population basic database
build a population basic information database and query service system with resident identity code as the unique identification, realize computer management and online query of population information, and provide population information services for e-government business systems
2. Basic database of legal entities
build basic information database and query service system of legal entities with organization code as the unique identification, realize the information sharing of legal entities among e-government business systems, and provide services to the society< According to the needs of national macro-control decision-making, social micro management, people's life and opening to the outside world, we should establish a scientific, authentic and comparable macroeconomic database. The index system of macroeconomic database not only has clear boundary, but also covers the macro situation of national economy, social development, science and technology ecation, environmental resources and so on. Macroeconomic database will become a comprehensive information channel of macroeconomic basic situation and development trend< 4. Basic database of natural resources and spatial geography
the basic information database of natural resources such as hydrology, mineral resources, land, forest, cultivated land and ocean has been basically built, forming a mechanism of exchange and sharing of basic resource information database. The basic information database of spatial geography should be constructed at different levels to form the mechanism of spatial geographic information exchange and sharing. It provides realistic simulation maps and decision support services for macro decision-making of governments and departments at all levels, overall urban planning, land use planning, land management, water conservancy planning, mineral resources planning, mining right management, geological environment management, road construction, environmental protection, etc<
subject information database
subject database is established according to the requirements of information resource planning and basic database
there are frequently used business data, which can be stored in the data center, but a large number of them are stored in the form of directory, and the data is always stored in each bureau, which not only ensures the consistency of the dynamic update of the data, but also ensures the security of the data. The data of subject oriented operational database comes from XML documents and information in the process of data exchange. Therefore, operational database must have good support for XML standards to ensure the efficiency and accuracy of information storage, exchange and retrieval
decision information base
on the basis of sufficient data sources, it can acquire, express, manage and apply distributed and heterogeneous knowledge sources. The whole system should support a variety of knowledge expression methods and reasoning methods, support the coexistence of structured data and unstructured data, and establish DSS; Data & quot; As a numerical value, it is transferred to DSS supporting the establishment of basic documents. It is necessary to integrate DW, DM, OLAP and other KDD knowledge acquisition methods to integrate all kinds of distributed and heterogeneous knowledge sources to provide various types of effective data analysis for decision makers and play the role of decision support<
other databases
data and document library: data and documents mainly include the instructions of national policies, relevant data and articles, etc., which are the basis for staff at all levels to handle various businesses, as well as the basis for learning national and municipal policies and laws
from the construction experience of a large number of information exchange and sharing projects, it is very important to determine the objectives of the information exchange and sharing project. All parties of the project construction should first reach a consensus on the following key issues of success:
· the problem of sharing and exchanging information service objects
· the service mode that different service objects should adopt
· storage and unified management of shared information
· scientific analysis of the sources of information
· related information technology standards and management standards
· principles for the design and construction of information exchange and sharing platform
these problems are the core problems to solve the information exchange and sharing, and are the practical problems existing in the project implementation. No matter how different the technical methods to solve the information exchange and sharing are, the real solution of these problems is the foundation and guarantee of the project construction< The significance of e-government project construction lies in that it can play a supporting role in various functions of the government, and use it technology to help the government improve work efficiency and promote the transformation of government functions. Therefore, to invest in the construction of a large-scale e-government project, first of all, it is necessary to determine its service objectives and the system construction's & quot; Theme Application & quot< br />
" The Eleventh Five Year Plan & quot; During this period, the party and the state made it clear that the establishment of & quot; Harmonious Society & quot; According to the characteristics of their own work functions, governments at all levels and functional organizations at all levels have determined the & quot; The Eleventh Five Year Plan & quot; Planning, on the premise of the overall goal, determines the goal system of each work. E-government project construction & quot; Theme application;, It is to determine the service goal of e-government project, and combine the construction goal of e-government project with the establishment of & quot; Harmonious Society & quot; It is an important part of the overall development goal of the government to link up the overall planning goal of e-government closely and clarify the overall development goal of e-government. The construction of information exchange and sharing mechanism must also face a challenge; Theme application;, A project that is divorced from the theme of service is a project without vitality
China's overall construction of a new socialist countryside, Beijing's floating population management, etc., are the key problems directly faced by different levels of government agencies. The theme application of e-government project should only focus on the most urgent problems to be solved by the government and the theme of the government's strategic objectives to carry out the construction of data exchange and sharing mechanism< The construction of information exchange and sharing mechanism is the long-term task of the overall construction of e-government, which keeps pace with the development of national economy and the process of the overall government function reform. The specific information exchange and sharing project construction must conform to the principle of practical priority and adapt to the future development. First of all, it is necessary to determine the construction objectives of specific projects, which must be established in the government agencies; Improve administrative efficiency and public service quality & quot; On the basis of the business objectives of the government, it engineering projects need to focus on the contribution to the current government function transformation project; In addition, we must fully respect the basis of practical work and the current administrative functions of the government, drive the engineering construction of the information exchange and sharing mechanism, transform the government information department into a specific actual business department, and clarify the viewpoint that the information department serves the actual business department of the government, The actual business work of the government should be closely linked with the construction of information resource sharing; According to the actual situation of different government agencies and local governments, the boundary scope of project construction is defined, the principle of project construction is determined, and the construction of long-term information sharing mechanism is well combined with the goal of single project construction; Technological innovation is prior to collaborative innovation of government business. The construction of data exchange and sharing platform needs to consider the needs of future business expansion and intensive engineering construction
3. Multi dimensional understanding of requirements
the guiding ideology of business information requirements analysis is three-dimensional system model. This is because only from the perspective of information resources, without in-depth study of the actual operation of government departments, it is difficult to do a good job in the information interaction and sharing project. We believe that government work is driven by the joint action and coordination of business management, execution driven and organizational management. Three dimensional system model is as follows:
figure: three dimensional system model
three dimensional system model composition: first, business management level, including key business system, support business system and auxiliary support system; Second, business driven mode, including target decision-making, task assignment, task decomposition, work organization, implementation and execution supervision; Three organizational forms, including the core decision-making level, work organization and implementation level and implementation level. Business information runs through the whole process of target management. Information system construction must meet the actual needs of different dimensions in order to truly reflect the strong supporting role of information resources for business
4. Information planning
the core of information planning is to establish a data supply chain for theme oriented applications, which needs to solve the problems of sharing and exchanging information, how to obtain from there, how to manage effectively, how to provide services to business systems, and form a clear chain of data proction, data processing and management, and data services. Information planning is built on the basis of data analysis, is a deeper analysis of exchange and sharing of information, is the top-level design of technology to achieve exchange and sharing of information
based on the guidance of information engineering methodology (IEM), using engineering method to plan information for information exchange and sharing is to follow certain method steps, follow certain standards and specifications, use effective tools to analyze information demand and data flow of various functional areas, and formulate basic standards for information resource management, Establish the information system framework of sharing domain and each functional domain
generally speaking, the content of information includes system analysis oriented to functional domain, data flow model, and topic library conceptual model oriented to shared domain. The specific content of information planning varies with the elements of a specific project. Information resource planning of information exchange and sharing construction emphasizes the close combination of information sharing requirement analysis and system modeling -- requirement analysis is the preparation of system modeling, and system modeling is the qualitative and standardized expression of information exchange and sharing construction. In the information planning of information exchange and sharing construction, we first determine the strategic construction objectives of specific projects, determine the work objectives of collaborative government agencies around the strategic objectives, and determine the work objectives according to the tasks of different organizations; Functional areas & quot;; Then, the business flow and data flow of each functional domain are investigated and analyzed, and the data flow model and data model for information exchange and sharing are established as the data basis for the construction of the whole information exchange and sharing platform
5. Shared data storage management
diagram data center database type division
Metadatabase
stores data describing data and its environment in Metadatabase
business rule base
abstracts business as a series of rules and stores them in rule database
business information base
stores important information obtained from front-end nodes in business information base
platform log library
a series of information generated in the process of platform data exchange is put in the platform log library< 1. Population basic database
build a population basic information database and query service system with resident identity code as the unique identification, realize computer management and online query of population information, and provide population information services for e-government business systems
2. Basic database of legal entities
build basic information database and query service system of legal entities with organization code as the unique identification, realize the information sharing of legal entities among e-government business systems, and provide services to the society< According to the needs of national macro-control decision-making, social micro management, people's life and opening to the outside world, we should establish a scientific, authentic and comparable macroeconomic database. The index system of macroeconomic database not only has clear boundary, but also covers the macro situation of national economy, social development, science and technology ecation, environmental resources and so on. Macroeconomic database will become a comprehensive information channel of macroeconomic basic situation and development trend< 4. Basic database of natural resources and spatial geography
the basic information database of natural resources such as hydrology, mineral resources, land, forest, cultivated land and ocean has been basically built, forming a mechanism of exchange and sharing of basic resource information database. The basic information database of spatial geography should be constructed at different levels to form the mechanism of spatial geographic information exchange and sharing. It provides realistic simulation maps and decision support services for macro decision-making of governments and departments at all levels, overall urban planning, land use planning, land management, water conservancy planning, mineral resources planning, mining right management, geological environment management, road construction, environmental protection, etc<
subject information database
subject database is established according to the requirements of information resource planning and basic database
there are frequently used business data, which can be stored in the data center, but a large number of them are stored in the form of directory, and the data is always stored in each bureau, which not only ensures the consistency of the dynamic update of the data, but also ensures the security of the data. The data of subject oriented operational database comes from XML documents and information in the process of data exchange. Therefore, operational database must have good support for XML standards to ensure the efficiency and accuracy of information storage, exchange and retrieval
decision information base
on the basis of sufficient data sources, it can acquire, express, manage and apply distributed and heterogeneous knowledge sources. The whole system should support a variety of knowledge expression methods and reasoning methods, support the coexistence of structured data and unstructured data, and establish DSS; Data & quot; As a numerical value, it is transferred to DSS supporting the establishment of basic documents. It is necessary to integrate DW, DM, OLAP and other KDD knowledge acquisition methods to integrate all kinds of distributed and heterogeneous knowledge sources to provide various types of effective data analysis for decision makers and play the role of decision support<
other databases
data and document library: data and documents mainly include the instructions of national policies, relevant data and articles, etc., which are the basis for staff at all levels to handle various businesses, as well as the basis for learning national and municipal policies and laws
7. Can buy, is a good value currency, the price is rising steadily, callback can add positions!
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