厚颜无耻韩国动漫在线阅读视频,艳妇厨房激情,一女三黑人玩4P惨叫A片,性生大片免费观看668

產(chǎn)品列表PRODUCTS LIST

首頁 > 測試服務(wù) > TC3000 Thermal Conductivity
TC3000 Thermal Conductivity
點擊次數(shù):2236 更新時間:2014-09-01

 

Thermal conductivity measuring methods can be divided into steady-state method and non-steady-state method by macroscopic mechanism of thermal conductivity. 

Steady-state method requires long period ,and there are also many other factors which affect measuring accuracy. However, non-steady-state method has the advantage of short measuring time, high accuracy and low requirements for operational environment. Especially, the transient hot-wire method has been considered internationally as the best measuring method of thermal conductivity in the research area of thermal conductivity.

 

Measuring Principle

The origin of hot-wire method could be traced back to the year 1780 when an American scientistJoseph Priestley made the first experiment about heat transfer ability of air. In 1931,Stâlhane and Pyk, who are the first to adopt transient hot-wire method in measuring the thermal conductivity of solid, powder and liquid,  Hot-wire method is now widely used in gas, liquid, solid, metal fusion and so on. 

 
黄龙县| 太原市| 镇平县| 天长市| 平江县| 建始县| 新密市| 青浦区| 萍乡市| 磐石市| 桂东县| 洪洞县| 灵台县| 普安县| 阿合奇县| 巴彦县| 三原县| 专栏| 牡丹江市| 蓬安县| 堆龙德庆县| 龙南县| 始兴县| 荣成市| 沽源县| SHOW| 佛山市| 丰县| 商洛市| 清镇市| 道孚县| 东平县| 龙江县| 云安县| 四子王旗| 榆社县| 保靖县| 伊通| 潞城市| 湄潭县| 朝阳区|