Data Loading Technology of Data Warehouse

Data warehouse is not the simply data accumulation of operational database. For exerting the function of data warehouse, the construction of data warehouse should be convenient for the data mining and business intelligent work, supply information access, analyze, and share for decision maker. The key to constructing a successful data warehouse is to fully understand the demand of end users from beginning to the end, search and storage data surround users motive closely. This paper first analyzes the data warehouse characteristic and the sort of data component, emphasizes in effective data loading methods and strategies from operational database to data warehouse, gives five sorts data loading methods.     

A data transfer method for improving seed identification of maize (Zea mays) haploid breeding based on genetic similarity

Maize haploid breeding technology is able to identify haploid seeds non‐destructively, rapidly and at low cost with the help of Near‐infrared (NIR) spectral analysis. However, due to the hybridization of numerous parents and the low production rate of haploid, the haploid data collection becomes a burden for engineering this technology. Biologically, there are considerable similarities between the progeny of the same female parent and different male parents. Based on this advantage, similar spectral data can be transferred when the NIR technology is employed. A revised method of Transfer adaptive boost (TrAdaBoost) is proposed to improve identifying for the backpropagation neural network (BPNN) classifier. To avoid the negative transfer, a screening thresh is used to select out similar data, and the amount of these data are limited to join current training. The results show that the identification performances are improved significantly when the data amount is small. This method shows a high ability to make the seed identification more convenient for engineering maize haploid breeding.     

Design of compatible processing and analyzing system for nuclear signals

To on line detect, store and process nuclear signals with multiple forms and multiple frequencies, a compatible processing and analyzing system for nuclear signals based on ultrahigh speed data acquisition card was constructed. When the source signal is at pulse form, the system records signal with the mode of time digital converting. When source signal is at continuous form, the system records signal with the mode of analog digital converting. The processing procedures and algorithms were designed for various signal forms. The results for nuclear random process such as correlation function and power spectrum were effectively obtained.     

Approach for Load State Detection in MIN

Some thoroughly research on the basic method for load state detection in MIN is introduced. Load sources of SCP and SSP in MIN are analyzed in detail after investigating the relationship between inter resource and load state in the system. And load detection parameters and model are presented. Moreover, a novel strategy to detect system load state based on fusion of multi detection data is presented. By some test, the theory and method are proved most feasible. Our research show that load state of MIN can be recognized by detecting utility of internal resource utilizing of single node in MIN, and multi redundant detecting data fusion is effective approach to improve the reliability and trust degree of the result.     

Research and implementation on WNXD database storage strategy

For the drawbacks of NativeXML, such as low data storage performance, low efficiency of querying and updating, a new kind of semi-structured information storage model, named WNXD, is proposed. The dynamic invert-sorting technique and data imaging mechanism are introduced to combine the record and the page storage mode, three structured indexes are established to achieve structural and dynamic growth with different ways. A practical storage mode is created to provide a comprehensive access strategy from global to local, and from elements, attributes to values, which guarantees effective and complete data storage, especially for the data with different types. The query number decreases I/O and the system performace is improved.     

基于MapGIS和AutoCAD土地开发整理规划的研究

MapGIS和AutoCAD各具特点,各有优势,已被广泛应用于土地开发整理领域。在土地开发整理规划设计中,灵活运用这2个软件可以准确提取数据信息、充分利用各种数据资源、提高规划设计效率并最终实现数据共享,这对不断提高土地整理技术以及保持耕地总量平衡有着重要意义。笔者从MapGIS与土地利用规划、AutoCAD与规划设计之间的联系入手,分析了实现两者数据共享所需解决的坐标转换和数据共享的问题,并以某土地整理项目为例,介绍分析了MapGIS和AutoCAD在土地整理中的应用,并完成了该项目的土地利用图和土地利用结构表。     

Data Access Technique and Implementation in ITS Virtual Common Information Platform

The framework of "ITS Virtual Common Information Platform"is introduced,which integrates and shares of data between ITS subsystems by integrating distributed storage and centralized control of data.The distributed data(access) engine of the platform is designed and implemented.Based on the distributed data access engine,the flow of data providing and accessing is addressed in detail.In the end a typical application of the distributed data access engine is presented.     

Design of Data Acquisition System for Vehicle Based on CAN Bus

To the question that a meter is correspond with a set of lead and a sensor,this paper presents a design of data acquisition system for vehicle based on CAN bus.In this way,the combinatorial instrument is only connected by a bus unit.Author introduces the data acquisition structure chart and the CAN interface,analyzes the software by program flow chart,and shows it's application for vehicle virtual instrument.A method of calculating vehicle speed,engine rotate speed and the course of development mileage are also given.     

Electro-circuit Design About the Data Acquisition and Wireless Transmission System Based on High-speed SCM

Considering the difficult of acquiring and transmission the signal from the moving equipment, a new fault diagnosis monitoring system is presented. The system acquires the state signal from the moving equipment by data acquisition module that based in W77E58 high-speed SCM, and transmits the data fast by wireless mode. The signal data can be use for fault diagnosis and precise analysis. The system has the ability for acquiring abundance of data with a high speed, the ability for high accuracy data conversion, and has a function of programme controlling gain and programme controlling low-pass filtering. The successful application of this system on the vibration monitor about the material-transporting bogie in an iron works of a domestic steel enterprise proves the stability and credibility about the design project, also testifies its practical value and versatility.     

VISAR Data Reducing Method and Its Application to Impact Experiment

Identification and adjustment on the disfigurements of original data of VISAR are probed by developing software for VISAR data reducing based on measure theory. Then the software is applied to plate impact experiment of ceramics. The disfigurements of light intensity data are identified and adjusted through Lissajou~ figures. The results indicate that VISAR data are reduced quickly and effectively by the software, and the exact free surface velocity history is obtained.