例句與造句

1. it is showed in this thesis that temperature is very important to single photon detection, but too low temperature is not good for detection because of afterpulse and the breakdown voltage
   本文的研究表明，溫度對單光子探測有著非常重要的影響，考慮到后脈沖的影響以及雪崩電壓的變化，溫度并不是越低越好。
2. a new method of absolute calibration of photodetector sensitivity based on spontaneous parametric down-conversion ( spdc ) biphoton field is described . the process of spdc is studied theoretically . the single photon detection probability and two-photon coincidence probability are derived and the calibration principle for photodetectors is explained . an experimental system has been set up . the sensitivity of a photon-counting photomultiplier tube was measured, and the results were compared with those obtained using conventional method
   討論了一種基于自發(fā)參量下轉(zhuǎn)換雙光子場絕對校準(zhǔn)光電探測器靈敏度的新方法，著重推導(dǎo)了對自發(fā)參量下轉(zhuǎn)換過程中產(chǎn)生的單光子的探測概率和雙光子的符合速率，從而闡明了絕對測量光電探測器量子效率的原理.基于這一方法對光子計數(shù)型光電倍增管的響應(yīng)靈敏度進行了測量，并將實驗結(jié)果與常規(guī)方法測得的結(jié)果進行了比較
3. It's difficult to find photon detection in a sentence. 用photon detection造句挺難的