Sysbase Application Example: Flood dike digitalization

The 1998 floods have focused countless people's attention on flood control, and today's flood control commanders rely on no more empirical inferences, but scientific evidence and numbers from water information systems. The flood control information System of the Ministry of Water has gone through nearly 10 years ' journey from the centralized computing mode to the client server computing mode as well as the two quality leap from the client server mode to the J calculation mode, and the database of the application has been upgraded and swollen. From the development of flood control information system, we also see the evolution of database technology and application. The flood control information system has been built since 1982, commissioning in 1984 and officially running in 1985. At that time, the hardware was PDP and VAX machine, the database is based on file system. Before the application of flood control information system, the collection of water regime data and the drawing of graphs are entirely in manual form, the data is transmitted by the way of Cipher Telegram, the manual translation is needed, the whole operation mode is time-consuming and laborious, the forecast of flood can only be based on experience, and the accuracy rate is relatively low The application of flood control information system in the 1985 fundamentally changed this traditional way. This file-based information system once played a huge role, but it has a lot of flaws, such as network congestion, user interface is not friendly, slow processing speed, and the data based on file system in the retrieval speed, security, integrity and consistency than the database system slightly less. In the 1991, Sybase database system based on client/server architecture was first introduced into the country, although it was less developed than traditional database, but its client/server architecture just caters to the distributed structure of Water conservancy system. The easy expansibility is precisely the Water conservancy information system pursues, the network function is formidable is the Water conservancy system hope. Therefore, the flood control information system was selected and adopted Sybase database system based on the results of client/server system in 1994. In the past 20 years, with the rapid development of communication and computer technology, The Water Conservancy Information Center has gradually established a series of modern means, such as the collection, transmission, reception, processing, monitoring and on-line flood forecast, which has developed an important role in the national flood control and drought relief work. China's existing water information flood station more than 8,600, all over the country 31 provinces, municipalities, autonomous regions and seven major watersheds. At present, the collection and transmission of water regime information is mainly in the following ways: In the form of water regime telegram through the telecommunications Department of Public Communications to the flood prevention departments at all levels, in the flood control key areas and populated area to establish a wireless flood network, in the key river flood and large reservoirs to establish hydrological telemetry system The water regime information is transmitted by water and electricity microwave communication trunk, and the remote superiority of water regime information in some provinces and basins, provincial and watershed institutions and the central region is carried out by using the public Packet Exchange data Network (CHINAPAC). Every day from the seven major river basin institutions and 31 provinces, municipalities, autonomous regions, thousands of of the water regime telegram, after the Beijing Telecommunications BureauThe programmable transfer machine and the public Packet Exchange data network Enter the VAX and Alpha server of the Water Conservancy Information Center, and after preprocessing, the Sybase database of the sun1000e server is deposited, and the flood Control consultation system, inquiry system and monitoring system developed by using GIS technology are For the Department of Water resources departments and the National Flood Relief Headquarters office to retrieve the use.

The

client/server has matured, but as the need for large-scale computing continues to grow, the burden on clients is mounting, with each system software and application software upgrade, which can also cause overwhelming client maintenance. With the improvement of the web, the flood control information system is changing from one step to the web-based computing mode. For example, the client/server architecture is like a customer/chef service pattern, any customer needs are directly facing the chef, both sides are very hard, the result is not satisfied with the customer, and if the waiter to contact between them, as long as the waiter is done, then both sides are very relaxed, and very happy, This is the web-based multilayer structure, the waiter is the middleware. Using Sybase middleware PowerDynamo and Jaguar CTS, flood control information system can serve the leaders at all levels well. The flood control information system based on the Web computing model also has the advantage of retrieving the data whenever and wherever it can connect to the Internet. The mobile computing model is the best solution to solve the problem that leaders can not be networked but must retrieve data at flood control sites or remote areas. When the network can be connected, the data of the background database is downloaded to the notebook computer database through the remote access type, and the information of this machine is retrieved, and the retrieval speed can be improved. The use of navigation and replication technology, in the Central, the seven major watershed institutions, provinces and cities to establish a real distributed database system, in any corner, as long as the network can be connected by the database Navigator, the most recent server to retrieve the required data.

Tao Tao River water will not stop flowing, flood control information system construction will not be stalled. In the final phase of 20th century, the blueprint for flood control information systems spanning to 21st century is also being portrayed. A national flood control and drought relief command system based on information collection system, communication system, computer network system and decision support system, which is advanced, practical, efficient and reliable, reaches the international advanced level, and can provide various flood control and drought relief information to flood control department at all levels in time. The forecast of flood or drought is more accurate, which provides strong technical support and scientific basis for flood control and drought relief dispatching decision and command and rescue. The Future Water Conservancy information system will be able to collect 3,002 hydrological data of the central flood control stations in half an hour, and to preliminarily realize the dangerous situation, real-time drought information, the format of statistical information of flood and drought, and the transmission and processing of computer network, including graphics, images, sound and analysis results. In addition to existing means of communication, it will also use satellite communications to guarantee the quality and reliability of information transmission. The National Water Conservancy Network Branch Center and above all levels backbone network, the park network and the department net also is in the construction. Based on the development technology of decision support system and expert system, the Water Conservancy information System will establish the technical support systems for flood control and drought relief decision-making in central, watershed, provincial and municipal level, and improve the efficiency, quality, benefit and scientific and correct decision-making of flood control and drought relief departments at all levels. The 1998 floods have focused countless people's attention on flood control, and today's flood control commanders rely on no more empirical inferences, but scientific evidence and numbers from water information systems. The flood control information System of the Ministry of Water has gone through nearly 20 years ' journey from the centralized computing mode to the client/server computing mode and the two-quality leap from the client/server model to the Web computing mode, and the database of the swollen has been upgraded again and again, From the development of flood control information system, we also see the evolution of database technology and application.

Since 1982, the flood Control information system has been constructed, commissioning in 1984 and the official operation in 1985. At that time, the hardware was PDP and VAX machine, the database is based on file system. Before the application of flood control information system, the collection of water regime data and the drawing of graphs are entirely in manual form, the data is transmitted by the way of Cipher Telegram, the manual translation is needed, the whole operation mode is time-consuming and laborious, the forecast of flood can only be based on experience, and the accuracy rate is relatively low The application of flood control information system in the 1985 fundamentally changed this traditional way. This file-based information system once played a huge role, but it has a lot of flaws, such as network congestion, user interface is not friendly, slow processing speed, and the data based on file system in the retrieval speed, security, integrity and consistency than the database system slightly less.

In the 1991, Sybase database system based on client/server architecture was first introduced into the country, although it was less developed than traditional database, but its client/server architecture just caters to the distributed structure of Water conservancy system. The easy expansibility is precisely the Water conservancy information system pursues, the network function is formidable is the Water conservancy system hope. Therefore, the flood control information system was selected and adopted Sybase database system based on the results of client/server system in 1994.

In the past 20 years, with the rapid development of communication and computer technology, The Water Conservancy Information Center has gradually established a series of modern means, such as the collection, transmission, reception, processing, monitoring and on-line flood forecast, which has developed an important role in the national flood control and drought relief work. China's existing water information flood station more than 8,600, all over the country 31 provinces, municipalities, autonomous regions and seven major watersheds. At present, the collection and transmission of water regime information is mainly in the following ways: In the form of water regime telegram through the telecommunications Department of Public Communications to the flood prevention departments at all levels, in the flood control key areas and populated area to establish a wireless flood network, in the key river flood and large reservoirs to establish hydrological telemetry system The water regime information is transmitted by water and electricity microwave communication trunk, and the remote superiority of water regime information in some provinces and basins, provincial and watershed institutions and the central region is carried out by using the public Packet Exchange data Network (CHINAPAC). Every day from the seven major river basin institutions and 31 provinces, municipalities and autonomous regions thousands of of the water regime telegram, after the Beijing Telecommunications Bureau program-controlled transfer machine, public packet Exchange data network into the VAX and Alpha Server, after preprocessing, stored in the sun1000e server Sybase database Using GIS technology to develop flood control consultation system, inquiry system, monitoring system, etc., for the Department of Water Conservancy departments and the national headquarters of the General Command of drought control to retrieve the use.

The

client/server has matured, but as the need for large-scale computing continues to grow, the burden on clients is mounting, with each system software and application software upgrade, which can also cause overwhelming client maintenance. With the improvement of the web, the flood control information system is changing from one step to the web-based computing mode. For example, the client/server architecture is like a customer/chef service pattern, any customer needs are directly facing the chef, both sides are very hard, the result is not satisfied with the customer, and if the waiter to contact between them, as long as the waiter is done, then both sides are very relaxed, and very happy, This is the web-based multilayer structure, the waiter is the middleware. Using Sybase middleware PowerDynamo and Jaguar CTS, flood control information system can serve the leaders at all levels well. The flood control information system based on the Web computing model also has the advantage of retrieving the data whenever and wherever it can connect to the Internet. The mobile computing model is the best solution to solve the problem that leaders can not be networked but must retrieve data at flood control sites or remote areas. When the network can be connected, the data of the background database is downloaded to the notebook computer database through the remote access type, and the information of this machine is retrieved, and the retrieval speed can be improved. The use of navigation and replication technology, in the Central, the seven major watershed institutions, provinces and cities to establish a real distributed database system, in any corner, as long as the network can be connected by the database Navigator, the most recent server to retrieve the required data.

Tao Tao River water will not stop flowing, flood control information system construction will not be stalled. In the final phase of 20th century, the blueprint for flood control information systems spanning to 21st century is also being portrayed. A national flood control and drought relief command system based on information collection system, communication system, computer network system and decision support system, which is advanced, practical, efficient and reliable, reaches the international advanced level, and can provide various flood control and drought relief information to flood control department at all levels in time. The forecast of flood or drought is more accurate, which provides strong technical support and scientific basis for flood control and drought relief dispatching decision and command and rescue. The Future Water Conservancy information system will be able to collect 3,002 hydrological data of the central flood control stations in half an hour, and to preliminarily realize the dangerous situation, real-time drought information, the format of statistical information of flood and drought, and the transmission and processing of computer network, including graphics, images, sound and analysis results. In addition to existing means of communication, it will also use satellite communications to guarantee the quality and reliability of information transmission. The National Water Conservancy Network Branch Center and above all levels backbone network, the park network and the department net also is in the construction. Based on the development technology of decision support system and expert system, the Water Conservancy information System will establish the technical support systems for flood control and drought relief decision-making in central, watershed, provincial and municipal level, and improve the efficiency, quality, benefit and scientific and correct decision-making of flood control and drought relief departments at all levels.