热电偶分类及噪声对热电偶法测温的影响及解决方法

本文介绍了热电偶的分类及不同种类热电偶的工作特性,并分析了噪声对测温的影响,在此基础上对用热电偶法测温给出了建议。

静电,电脑用户要当心

每当你用手指点着电脑屏幕上的数据时,屏幕前的视保屏所积累的静电正通过你的手指进行放电,你会感到一阵麻木,本能地缩回伸出的手。这是因为人体或电脑携带静电的缘故。静电还可由摩擦产生,由于两个物体间的摩擦作用,一个物体表面的电荷转移到另一个物体上去,而使它们带有多余的电荷。静电的产生虽与摩擦有关,但它的积聚却与环境温度、物体对地绝缘电阻有关。当天气干燥时,电荷易于积聚,这就是冬天比夏天更容易观察到静电现象的原因。静电对电脑所产生的危害是无形的,主要是静电噪声对电脑信号的干扰,其次是对电脑芯片的损坏,尽管静电的寄生电流很小,但数千伏的静电电压足以击穿耐压至多几十伏的电脑芯片。虽然静电尚未对人体安全构成威胁,

电脑用户要当心静电

每当你用手指点着电脑屏幕上的数据时,屏幕前的保视屏所积累的静电正通过你的手指进行放电,你会感到一阵麻木,本能地缩回手。静电对电脑的危害是无形的,主要是静电噪声对电脑信号的干扰,其次是对电脑芯片的损坏。防止静电侵害的措施要从静电产生的原因着手。一是让工作环境保持一定的相对湿度,相对湿度取50%至70%较合适。在电脑室配置恒温恒湿专用空调较有效。二是将电脑设备外壳接地,如果电脑室铺设金属防静电地板,地板的支撑脚也应接地,使静电电荷无法在电脑或其他物体上积聚。

Preparation and operation characteristics of organic semiconductor transistor using thin film Al gate and copper phthalocyanine

The organic static induction transistors (OSITs) are fabricated by the method of evaporating and plating in a vacuum with copper phthalocyanine (CuPc) dye, and has a five layered structure of Au/CuPc/Al/CuPc/Au. The experiment reveals that OSITs have obtained a low driving voltage, high current density and high switch speed such as I_ DS = 1.2×10 -6 A/mm2, and the degree of 1 000 Hz. The OSITs have excellent operation characteristics of typical static induction transistors.

Photodetachment of H^- in a Static Electric Field near a Surface

在表面附近的一个静态的电场的 H- 的相片分开基于关上的轨道理论被调查。它被发现在离子之间的距离，表面调制相片分开的生气的节。为对电场垂直的有弹性的表面，当仅仅电场存在时，分开光谱显示楼梯结构，在有光滑的摆动的对比。

与Bob对话:Responses(英文)

Dear Friends,English Salon has asked me some excellent questions.Hereaxe my responses:You seem to be sort of a mysterious man in readers’eyes.Would you please first tell us about your fife experience?There should be no mystery about me.I was born about 85years ago in a small city about 100 kilometers north of NewYork City.I faced no big problems growing up with myparents and my younger brother.This was beforecomputers,cell phones,or televisions were invent-ed.Only wealthy persons owned cars.I