Tests for safety - related controls employing solid - state devices 固體器件安全控制裝置的試驗
Solid - state devices are always powered by direct currents and voltages 固體狀態(tài)設(shè)備總是以直流和電壓為動力。
Scr silicon controlled rectifier - - a three - electrode solid - state device which permits current to flow in one direction only , and does this only when a suitable potential is applied to the third electrode , called the gate 可控硅整流器可控硅整流器? ?三電極固態(tài)元件,只有當(dāng)匹配的電壓作用于第三電極(選通電極)時,才能夠保證電流朝一個方向流動。
This article analyses the characteristic of fingerprint image and brings forward some reasonable supposes which related to the fingerprint image after i collected and analyzed many articles of others that is related to the fingerprint image processing and has published in the resent years . based on these characteristic and supposes , i developed a set of fingerprint image processing arithmetic that are adapt to the fingerprint image gathered by capacitive solid - state device . these include several steps 作者收集和分析了近年來大量的國內(nèi)外的關(guān)于指紋圖像處理技術(shù)的學(xué)術(shù)文獻基礎(chǔ)上,分析了指紋圖像的特性,提出了對指紋圖像的一些合理的假設(shè),并從這些假設(shè)出發(fā),提出了一套適用于電容式指紋傳感器采集的指紋圖像的處理算法,這些算法包括指紋圖像的有效區(qū)域提取、指紋圖像的質(zhì)量分析、指紋圖像的分割、指紋圖像濾波、二值指紋圖像的細化、特征點的提取、特征點的可靠性分析、指紋圖像的點模式匹配等步驟。
This thesis describes the properties of millimeter wave , and development of the millimeter wave sources nowadays , and introduces the solid - state devices impatt diodes , and analyses the technology of the injection locked . then this thesis gives out how to design the pa module in detail . and practical circuit is given out with the test result and analyses 本文首先綜述了毫米波特點,毫米波源的發(fā)展現(xiàn)狀,介紹了w波段impatt器件的基本工作原理,分析毫米波波導(dǎo)電路中的注入鎖定技術(shù),給出實現(xiàn)連續(xù)波或脈沖功率放大的w波段信號源的功放模塊的技術(shù)方案、測試結(jié)果和綜合分析。