监控系统中,做一个8个屏幕的电视墙,是不是一定要有矩阵切割器?

弱电上的机电设备监控系统点位表上的AI、DI、AO、DO各是什么意思请教能人啊
还有其它模拟量、其它开关量是什么意思啊
对其它模拟量和其它开关量的具体问题星期一再发过来

为了确保行车安全，列车上的监控系统，通过对高速运转车轮的热辐射产生的一种不可见光进行检测，实现对车轮温度的实时监控．这种不可见光是______．

为了提高铁路的运输效率和运行安全,沿线车站都设有列车运行监控系统,该系统主要利用的地理信息技术是
A GIS,RS B GPS,RS C GPS,VR D GIS,GPS 为什么选D

为了确保行车安全，列车上的监控系统，通过对高速运转车轮的热辐射产生的一种不可见光进行检测，实现对车轮温度的实时监控．这种不可见光是______．

为了确保行车安全，列车上的监控系统，通过对高速运转车轮的热辐射产生的一种不可见光进行检测，实现对车轮温度的实时监控。这种不可见光是 。

求专业大神 帮我外文翻译 关于发电厂的监控系统
There are many methods that have been used to enhance
participation in IS planning and requirements analysis. We
review some methods here because we think they are fairly
representative of the general kinds of methods in use. The
methods include Delphi, focus groups, multiple criteria
decision-making (MCDM), total quality management
(TQM), and SADT.
The objective of the Delphi method [17] is to acquire and
aggregate knowledge from multiple experts so that
participants can find a consensus solution to a problem.
A second distinct method is focus groups (or focused
group interviews) [18]. This method relies on team or group
dynamics to generate as many ideas as possible. Focus
groups have been used for decades by marketing researchers
to understand customer product preferences
MCDM [19] views requirements gathering and analysis
as a problem requiring individual interviews. Analysts using
MCDM focus primarily on analysis of the collected data to
reveal users’ requirements, rather than on resolving or
negotiating ambiguities.
谷歌翻译 我也会 不通顺 看不懂 老师那里通不过

（2012•惠安县质检）如图所示是商场的监控系统，人们进入商场距门口0.5m-1.2m处时，安装在门上的人脸识别系统的摄象机就可以对其面部特征进行快速影像记录．由此判断，监控系统的摄象机镜头是相当于一个______镜，它的工作原理与______（选填“照相机”、“投影仪”或“放大镜”）相似．人经过时成______（选填“倒立”或“正立”）的实像．