办公管理监控应用解决方案

1 用户需求 办公区环境中需要对室外的人员流动进行监控、村楼内重要区域进行监控,同时利用监控设备,将指纹机、打卡机等设备的数据传输到中央管理平台。整个监控系统有如下需求: 整个监控系统三级组网:即一级总控中心,二级分控中心和三级监控站点。总控中心设置于主楼,办公区内各楼,各设一个分控中心,主楼的总控中心可兼做主楼的分控中心。每个分控中心下设多个监控站点,数量由工作需要确定。每个监控站点包含4个摄像机(根据需要,还可能包含云台解码器和报     

5月安防供应类产品热点分析

1 五月市场供应热点 据secumag.com网站的供应产品统计分析反映,5月份用户通过网络对市场上供应类安防产品的关注热点主要集中在手机信号屏蔽(截断)器、数字网络摄像机、面像识别门禁/考勤/布控追逃系统、多通道电话录音系统、视频快速检索器等一些产品上、其点击比率如下图所示:     

基于GIS技术的县市级防汛信息系统

防汛减灾是县市水利部门的重点工作。以临海市防汛决策指挥系统为实例，探讨了基于GIS技术，采用Client／Server模式的防汛信息系统的解决方案。根据防汛业务管理工作的实际要求，分析了系统的属性和空间数据库的存储结构和建库方法，实现了防汛信息系统的各主要模块及其功能。     

电工电子产品环境试验标准（一）

标准编号标　准　名　称采标情况代替标准ＧＢ/Ｔ 2 4 2 1 1999电工电子产品环境试验　第 1部分 :总则ｉｄｔＩＥＣ6 8 1:1988ＧＢ 2 4 2 1 1989ＧＢ/Ｔ 2 4 2 2 1995电工电子产品环境试验　术语ｅｑｖＩＥＣ6 8 5 2 :1990ＧＢ 2 4 2 2 1981ＧＢ/Ｔ 2 4 2 3.1 2 0 0 1电工电子产品环境试验　第 2部分 :试验方法　试验Ａ :低温 ｉｄｔＩＥＣ6 8 2 1:1990ＧＢ2 4 2 3.1 1989ＧＢ/Ｔ 2 4 2 3.2 2 0 0 1电工电子产品环境试验　第 2部分 :试验方法　试验Ｂ :高温 ｉｄｔＩＥＣ6 0 0 6 8 2 2 :1974ＧＢ2 4 2 3.2 1989ＧＢ/Ｔ 2 4 2 3.3 199…     

烟气循环流化床脱硫工艺的技术经济分析

介绍了烟气循环流化床的脱硫工艺及其流程，在与石灰石／石膏法脱硫工艺比对的基础上，进行了技术经济分析，并展望了在我国的应用前景。     

Determination of methyl tert-butyl ether (MTBE) in Chinese fuels by gas chromatography/mass spectrometry and gas chromatography/flame ionization detector

A method was developed to determine the concentration of methyl tert-butyl ether(MTBE) in gasoline,diesel and heating oil by gas chromatography(GC) with mass spectrometry(GC-MS) or flame ionization detection(FID). The diluted gasoline was directly injected into the GC, and the complete separation of MTBE from co-eluting hydrocarbons was not required. GC/MS or GC/FID method can be used to analyze MTBE in different concentration range and have good consistency.     

Characterization of fine organic particulate matter from Chinese cooking

PM2.5 samples were collected by a three-stage cascade impactor at two kinds of Chinese restaurants to characterize fine organic particulate matter from Chinese cooking sources. Major individual organic compounds have been quantified by GC/MS, including series of alkanes, n-alkanoic acids, n-alkanals, alkan-2-0nes and PAHs.Alkanes and ketones make up a significant fraction of particle-phase organic compounds, ranging from C11 to C26,and (C9 to C19, respectively. In addition, other organic compound classes have been identified, such as alkanols,esters, furans, lactones, amides, and nitriles. The mass concentrations of fine particles, alkanes, n-alkanoic acids and PAHs in air emitted from the Uigur style cooking are hundreds times higher than ambient PM2.5in Beijing.     

乳品工业废水处理

本文比较了乳品废水的几种处理方法，介绍了水解－－好氧（H／O）工艺的特性及主要设计参数。