Design and Development on Magnesium Alloys Database Based on Web

Based on web, an integrated magnesium alloys database system has been constructed, by adopting three-tier architecture and using advanced technologies such as ASP. In this database system, the user only owning a global browser can conveniently use this database system, which is a powerful tool to cut down the cost and time for developing new magnesium alloys.     

Optimization of a web based query system for a magnesium alloy database

Based on an existing magnesium alloy database, a query system is optimized by considering the design characteristics, and an integrated query system for this magnesium alloy database is developed to meet the demands of more users. The result shows that the new system improves the query efficiency of the magnesium alloy database, especially for queries concerning phase diagrams and the structure of magnesium alloys. This means that the new system provides users a more powerful and useful magnesium alloy database.     

Research on QoS Strategy of Web Server Cluster Application Based on Request Classification and Request Admission Control

The increase of requests often results in performance degradation of the web server cluster. The quality of service (QoS) expected by users can't be guaranteed. This is the problem that service-level web server cluster must cope with. In this paper, two strategies are proposed including classification of the user requests and request admission control, the different quality of service can be reached and the QoS of service-level users is guaranteed. The simulation experiments proved, the load balance of the system is improved and average response time of the system is decreased.     

Fuzzy decision for wastewater treatment process selectionbased on gray theory and its application

Decision making of sewage treatment process directly affects the accuracy and efficiency of the process selection. An optimized fuzzy decision method is proposed based on fuzzy decision and contrast weighting method. Moreover, a web based decision making support system for the selection of sewage treatment process is developed with the Apache+PHP+MySQL development environment. The system had realized the online decision making for sewage treatment process, and enhanced accuracy and reduced the decision making time.     

Design on Web Accessibility for Barrier-free Website

The main idea of web accessibility is how to design and develop websites to benefit all web users. The ultimate purpose of web accessibility is to develop barrier-free environment on the Internet. However, most websites have overlooked the problem of the web accessibility. This paper introduces the significance of web accessibility and the related web accessibility guidelines, provides general design principles for web accessibility and the development techniques of the accessible web pages. It contributes to increase the accessibility of websites and better develop barrier-free websites.     

Web System Development Model Based on Access Security MVC

In order to reduce the inconvenience of maintainability and reusability of web application system based on MVC, which is brought by the code of access security and coupling tightly with other modules, A web system development model based on access security MVC is put forward. The main framework and running process are provided and the key techniques of this model are researched. The model is applied to the practical development of the network distribution management system.     

A New Method of Online Adaptive Classification of Web Pages

The web documents classification is an important research content of web mining. Document vector space model is the foundation of automatic classification of documents, while it is difficult to eliminate redundant attributes and reduce the dimension of the vector space. The Rough Sets Theory is applied to generalize the information system comprised by document samples set, and to compute the best reducing properties set. So dimension of document feature space is reduced greatly, and disturbance to document classification is decreased too, which improve the efficiency of classification. In addition, using the advantage of adaptive classification and incremental learning of Fuzzy ARTMAP neural network, the online adaptive classification of web document is achieved.     

基于51Ditu公用API接口的土壤标本地理分布信息系统

福建农科院农业生物资源研究所收集了大量的土壤标本应用于土壤微生物研究,为使土壤标本管理实物与信息紧密结合,直观显示土壤地理来源,建立了基于灵图公司公用地图API接口的地理分布展示系统。系统属性数据为土壤标本采集地信息和全国县级行政区划信息;空间数据由公用API实时提供。系统采用基于Ajax的B/S模式,将土壤标本采集地点、数量等信息叠加显示在客户端网页地图上,以行政区划方式浏览;数据编辑部分提供了对土壤标本的添加、删除和更新功能。     

Development of Measurement and Control System of Engine Test-bed Experiment for Motorcycle

Engine test-bed experiments are the main means of engine performance test, whose necessary developing trend is to apply measurement and monitoring system based on the computer. This paper introduces alteration for engine test-bed experiment system. By adopting data acquisition system, using web and ftp technique, computer-controlling and remote monitoring in real-time are realized. And the details of singlechip are mainly discussed based on data acquisition system, testing-software, web and ftp technique. The improved system realizes automation of engine test-bed experiment and data processing. It can save time and manpower, increase the productivity and improve the working condition. Especially the interface of system software developed by Delphi under Windows is simple, clear and easily dealt. The practical application proves that the new system has good value for engineering.     

Experimental Analysis of Simply-Supported Concrete Box Girder with Web Openings model Under Double Uniformly Distributed Load

In order to satisfy the demand of the double-deck traffic in city, a concrete box girder model with rectangular web openings was designed with ratio of 1:6. Experimental study was carried out to investigate the flexural capacity of the model girder with double uniformly distributed load. The finite element model was established based on the experiment and the results agreed with measurement results. The effect of the web openings on the girder was explored. The results demonstrated that the deflection caused by load on bottom plate of box girder was 9.7% more than that of load on the top plate. The deflection of girder with web opening is 22.9%~28.1% greater than that of girder without web opening. Compared with girder without web opening, the shear lag of girder with web opening increased, of which the maximum value was 62.0% in various working conditions. simply-supported concrete box girder with web openings under double uniformly distributed load affect the flexural capacity.     

Content-aware Load Balancing Strategy in Web Cluster System

The capacity problem of web server can be solved by web cluster technology. The key point is load balancing strategy and algorithm. Traditional slrategies are effective to some kinds of web sites, but not suitable for all. The paper analyses the load characters of different kind of web sites. A content-aware web cluster load balancing strategy and algorithm is proposed. The efficiency will be evaluated through emulation experiments.     

信息技术在测土配方施肥中的运用

论述了国外欧美等发达国家信息技术在土壤养分管理和施肥技术上的运用特点，分析了中国测土配方施肥对信息技术的要求、发展趋势，提出了中国目前测土配方施肥信息化处理的要求、任务和内容，分析了县市农业技术推广部门在测土配方施肥运用信息技术存在的问题。测土配方施肥中信息技术的运用主要包括：（1）应用数据库技术和地理信息系统，按照标准处理和整理土壤肥料等数据和相关图件，建立属性数据库和空间数据库与管理系统；（2）利用地理信息系统和基础数据库，结合应用模型，建立耕地地力评价系统、施肥决策系统等测土配方施肥应用系统；（3）将网络技术与已建立的应用系统结合起来，实现数据库的共享化和测土配方施肥的网络化。     

基于微信公众平台的枣树病虫害专家诊断系统开发

为快速传播并普及枣树病虫害知识,使用农业专家系统提高枣树病虫害诊断及管理效率,基于微信服务号公众平台,采用php脚本语言及mysql数据库开发出枣树病虫害专家诊断系统"JujubaExpert2020".该系统包括病虫诊断、栽培历史及枣树资讯3个功能模块,核心功能为枣树主要病虫害数据库和专家诊断论坛.用户可以通过关键字...     

施工阶段大跨径预应力混凝土刚构桥腹板开裂机理

进行了大跨径预应力混凝土刚构桥腹板开裂机理研究,基于弹性力学平面问题分析方法,推导了集中荷载作用下的板件应力函数表达式,绘制了不同受压边长与集中荷载长度比（d/a）下的横向应力曲线,拟合了集中荷载作用下构件的横向应力求解函数,构造了混凝土刚构桥腹板在预应力集中荷载作用下等效压力矩形的选取方法,并基于平面应力的表达式提出了在三维情况下沿预应力轴线的横向应力计算方法。通过建立某预应力混凝土刚构桥0~3#段实体有限元模型,分析施工过程中刚构桥混凝土腹板在不同等级预应力作用下的开裂情况。结果显示：有限元裂缝模拟与实桥腹板开裂范围一致,有限元应力分析结果下限值与推导的横向应力求解函数计算结果接近,变化趋势一致,印证了横向应力函数求解方法的正确性。     

Solid Waste Management Information System Based on GIS in Chongqing

The large quantity of MSW (municipal solid waste) and ISW (industrial sold waste) piled up in Chongqing has been threatening ecological environment and water resource. Efficient management is the important guarantee of disposing solid waste. This paper describes the data system of Management Information System of the Solid Waste in Chongqing based on the GIS, construction of information database, overall structure, main functions, etc. Integrating related solid waste technology with computer and geographical system, it can provide the reliable, scientific and convenient management and decision-making support of solid waste in Chongqing. The information system, developed by means of Geographical Information System (GIS) on the basis of a great deal of data and graphs of solid waste of Chongqing, includes six sub-systems as follows:data input sub-system;data query sub-system;database management and maintenance sub-system;database of modal management sub-system;application and output sub-system;system management. This system provides friendly and easy operational interface, and plays a significant role in the disposal and management of solid waste in Chongqing.     

Database Technology in Wireless Sensor Networks

As a result of combination of microsensor technology,low power computing and wireless networking,wireless sensor networks become an active branch in scientific territory of computer science at the moment.The recent reserch work on data management of wireless sensor networks is mainly introduced. In order to achieve high performance of the data-center network system,and supply an effective sensor database administration processing system in the interest of observing person or consumer,Separately proposed valid settlement schemes for the two key problems in database technology: data model and query processing.     

本溪地区干旱监测评估系统研究

在全球变暖的大背景下,干旱已成为本溪地区主要气象灾害之一。本研究利用VB 6.0和Access数据库管理等现代技术,开发建成了“本溪地区干旱监测评估系统”。该系统包括气候资料数据库子系统、气候影响客观评价子系统、干旱指标库、干旱灾害历史数据库查询子系统、干旱产品服务子系统5个部分,能够进行大气干旱Z指数和农业干旱β指数模型的自动计算,可实现对全地区干旱监测、分析和评估等业务工作的支持,为大气和农业等领域的干旱监测评估工作提供丰富的图形、表格和文本等数据信息,为农业生产决策提供科学的依据。     

Main Frame of Contemporary Integrated Manufacture System

Based on the success of CIM philosophy applied in manufacturing industries for reference, the author, analyses the character of modern furniture's produce and management, etc., and set out from real need of modern furniture manufacture to establish the architecture of contemporary integrated furniture manufacture system. The key technologies such as methods and viewpoints of contemporary integrated furniture manufacture system are discussed. Finally, the stream of material is reviewed as core and ERP, FEC is included in contemporary integrated furniture manufacture system based on web distributed database is put forward. The work is a helpful investigation to CIMS and gives a beneficial idea to implement CIMS in furniture industry.     

大豆油脂产品质量安全追溯体系的构建

为建立大豆油脂产品质量安全追溯体系,以油脂产品各环节的实际生产为基础,利用ASP.NET,SQL Server系统软件,建立了大豆生产信息及加工过程中关键控制点数据库,构建了追溯体系。实现了不同终端客户利用不同的查询途径即可获得大豆油脂产品的追溯查询信息,以及对大豆油生产、流通、消费、服务等过程的全程监管和经营责任的追溯愿望。     

大豆吡哆醇生物合成蛋白基因(PDX)的电子克隆和进化分析

电子克隆(In silicocloning)是随着基因组计划和EST计划实施而发展起来的利用生物信息学手段进行基因克隆的新方法。根据物种间同源基因相对保守的特点,以拟南芥(Arabidopsis thaliana)吡哆醇生物合成蛋白cDNA序列为信息探针,对大豆(Glycine max)EST数据库进行同源搜索和序列拼接,获得了1 280 bp长的大豆吡哆醇生物合成蛋白的基因序列(GenBank登陆号为DQ139265)。经过RT-PCR扩增、基因组PCR扩增、分子克隆和序列分析验证,结果表明与电子克隆序列完全一致。该基因具有完整的开放阅读框架(ORF,20~955 bp),编码311个氨基酸。通过与水稻、日本百脉根、烟草、截形苜蓿等物种的吡哆醇生物合成蛋白序列比对,发现该基因具有高度的保守性。表明根据物种间同源基因序列,对跨物种间EST数据库进行同源检索、筛选、拼接,是克隆基因的有效途径。