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According to the hydrodynamic characteristics of high salinity lake, a three dimensional hydrodynamic numerical model is built to simulate the flow in Aibi Lake in northwest China. Selecting typical wind fields, to simulate the formation process of wind driven flow and 3D spatial distribution characteristics of hydrodynamic parameters. The study result shows that the formation process of wind driven...
This article designed a bandgap voltage reference source with a low temperature drift, high power supply rejection ratio for the TCXO chips , and design the sensitive reaction of thermal protection circuit is used to protect TCXO chips. The structure of self-biased currentsource and differential operational amplifier is used in thebandgap reference, And the over temperature protectioncircuit controlled...
An optimized coverage algorithm based on the improved PSO is put forward targeted at the issue of coverage and energy consumption in the data-collection-oriented wireless sensor network (WSN). Through improving the valid position of the PSO's computational nodes, the work nodes covering the monitoring zone are chosen according to the network coverage quality to be properly moved. The simulation experiment...
In this paper, we study on the problem of large scale social network community detection method, which is an important issue in Online Social Networks data mining. The proposed social network community detection system aims to divide the social network into several communities according to internal relationships among users. Particularly, this system is made up of two steps, that is, 1) detecting...
A multi-channel spectrum on-line auto-monitor method for satellite communications signal is designed, which is different from the traditional single-channel method based on the spectrum analyzer. To realize the novel method, a suitable signal monitoring point is selected firstly, a system architecture of "monitoring point & directional coupler & integrated matrix network & spectrum...
The decision-making model is a model established for the management decision, that is, it is a mathematical model developed to aid the decision-making. With the development of operational research, some effective decision-making analysis methods such as linear rule, dynamic rule, game theory, queuing theory, savings and deposit model, scheduling model have appeared. The fuzzy mathematics theory and...
For the question that how to show the emergency supply in the software, a mathematical model is developed in this paper. The mathematical model distinguishes connecting sides, nodes from different networks, which includes modeling events as material information, information of transporting vehicles, scheduling schemes, and disaster points. Then according to requirements of the modeling elements and...
Design water level is the basic parameter for Marine engineering design, which based on existing hydrological data of the port to calculate. In practice, the correlation between the short-time hydrological data of the newly built port and the long-term hydrological data of the nearby ports are often unable to meet the requirements of the standard calculation of extreme water level, and the result...
In recent years, with the rapid development of solar energy and other renewable energy, PV grid connected power generation technology has more and more attention. Grid connected inverter is the core of grid connected power system. When grid connected inverter operated in grid, the current control mode is essentially a voltage source input and current source output of the inverter. At present, a lot...
The paper puts forward a novel coal mine management system to solve the real-time monitoring and highly efficient rescue problems of underground work platforms. The scheme of ZigBee wireless sensor network combined with Controller Area Network (CAN) bus is adopted in this system. ZigBee substation is set at proper intervals in mine laneways to acquire Radio Frequency Identification (RFID) position...
On the basis of depth study of commercial bank credit risk control model literature, this paper introduced the concepts of credit risk and credit risk control. We research the main influencing factors of commercial bank credit risk control scientifically by artificial neural network theory, and then set a commercial bank credit risk control index system which contains 3 levels of 27 indexes. Improved...
This paper discusses the application of big data in the residents travel guidance system. The system is based on traffic service information platform and tries to make the information collection and analysis system suitable for more types of data through applying the big data with characteristics of volume, variety, velocity. The application of big data processing technology in this system will form...
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