水流流量计的设计与开发

采用水压传感器、流速传感器、 STC89C58RD MCU等器件的明渠流量测量仪表能自动完成流态判别、流量公式和流量参数选择,实时获得明渠流量.具有成本低、精度高、安装使用简便、可广泛应用等优点.     

高速公路监控系统中图形系统的设计与实现

在分析高速公路监控系统中图形软件功能的基础上讨论了在C/S模式下图形软件的设计与实现.采用基于多线程的系统设计达到了图形系统实时刷新模拟屏的要求,并利用MapX软件实现了图形系统的缩放,漫游,设备故障闪烁等功能.     

Remote sensing based estimation system for winter wheat yield in North China Plain

1IN~IOXChinaisabigagriculturalcountrywithaverylargePOPulation.ChinesegovernmentattacheSgreatimportancetomdproduction.Anobviousapplicationofsatelliteremotesensing,withitsregularsynOPticcoverage,istOmonitoragriculturalpefforrnance.CropyieldestimationhaSbeenoneofthemainapplicationsofspaceremotesensingtechnologysincethelaunchingofhighrefutionsatellite-Landsat.Forgaininginformationofcropsproductionintime,StatePlanning~ssionsetupanationalkeyprojectduringtheeighthfiveyearplanPened(1991--1995)c…     

Impact resistance performance and optimization of the sand-EPE composite cushion in rock sheds

Rock sheds are widely used to prevent rockfall disasters along roads in mountainous areas. To improve the capacity of rock sheds for resisting rockfall impact, a sand and expandable polyethylene(EPE) composite cushion was proposed. A series of model experiments of rockfall impact on rock sheds were conducted, and the buried depth of the EPE foam board in the sand layer was considered. The impact load and dynamic response of the rock shed were investigated. The results show that the maximum impac...     

冰雹云雷达回波自动识别系统

利用CAPPI资料对立体风暴进行识别，计算并提供出实用的风暴结构参数，采用矩心踊跃法和矩不变量法相结合对单体风暴和混合性风暴回波进行跟踪；最小二第线性外推预报；根据WSD－88D的冰雹算法，在风暴结构基础上本文建立了Windows98操作平台上冰雹识别系统，经单站1年11次强对流天气过程的资料检验，结果表明：雹云识别精度达82％。系统建立了大量人机对话框以方便用户，增加实用性及推广性。     

Web Service基本特征及其在构造供应链管理系统中的应用

对Web Service理论和技术的基本特征进行了探讨，并应用该技术的跨平台互操作性和结合XML的数据通信的开放性为大型集团公司构造供应链管理系统，从而证实Web Service为企业间进行信息数据交换提供了强有力的技术支撑。     

Evaluation of suitability area by ground source heat pump system in Baotou plain

According to the elements of hydrogeological conditions,lithology,stratigraphic thermal physical parameters,construction technology and economic rational elements,the evaluation system of ground source heat pump( GSHP) were established in Baotou plain. The factor weights were determined by using analytic hierarchy process,and the comprehensive element method was selected to evaluate the region suitability of GSHP system. The results show that the suitable area is 559. 63 km2 for utilizing GSHP in the studied area,accounting for 62. 58% of the total area; while the unsuitable area is 334. 60 km2,accounting for37.42%. The evaluating results can provide not only a scientific basis for development and utilization rationally of shallow geothermal heat in Baotou,but also offer an important reference to the other areas.     

Evaluation of suitability area by ground source heat pump system in Baotou plain

According to the elements of hydrogeological conditions, lithology, stratigraphic thermal physical pa- rameters, construction technology and economic rational elements, the evaluation system of ground source heat pump （GSHP） were established in Baotou plain. The factor weights were determined by using analytic hierarchy process, and the comprehensive element method was selected to evaluate the region suitability of GSHP system. The results show that the suitable area is 559.63 km^2 for utilizing GSHP in the studied area, accounting for 62.58% of the total area; while the unsuitable area is 334.60 km2, accounting for 37.42%. The evaluating results can provide not only a scientific basis for development and utilization rationally of shallow geothermal heat in Baotou, but also offer an important reference to the other areas.     

基于PowerBuilder的信息系统的权限控制

针对信息系统安全的考虑,介绍在PowerBuilder环境中对用户权限的具体控制.     

CAN总线在控制系统中的应用

阐述了CAN总线的工作原理，并运用SJA1000、PCA82C250和单片机ADuCS12实现了CAN节点与上位机的通信。     

用Atmega8L实现无线恒温控制燃气热水器

介绍了无线恒温控制系统的作用和组成、单片机Atmega8L、无线模块nRF905的特点和引脚、步进电机的控制和驱动，热敏电阻的连接以及整个系统的软硬件实现。