sn ratio 中文意思是什麼

sn ratio 解釋
信噪比
  • sn : Sn ＝【化學】 stannum （＝tin）; sanitary.
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. A detailed analysis of the electrical properties of ato thin films was carried out in order to investigate the sb / sn atomic ratio and substrate temperature ' s influence on the ato thin film. a convictive explanation brought forward to illustrate the changing of the electrical ； properties of the ato thin film in different conditions

    在溫度較低時（ < 500 ） ，薄膜的方塊電阻隨成膜溫度的升高而降低；當基板溫度繼續升高，薄膜的方塊電阻隨基板溫度的升高而增大，這主要是因為玻璃基板中k ~ + 、 na ~ +離子向薄膜中的擴散。
  2. Starch nanoparticles ( sn ) have been prepared with w / o starch microemulsion as microreader and epichlorohydrin as cross - linking agent. the factors affecting the preparation of sn have been investigated via the characterization of tem. the results show that the size and size distribution of sn are mainly controlled by the interfacial strength of microreactor, and the interfacial strength of microreactor is chiefly influenced by w value ( the molar ratio of water / surfactant ) and concentration of starch

    利用所得到的w o型澱粉微乳液作為微型反應器，以環氧氯丙烷為交聯劑制備出澱粉納米粒，並藉助透射電鏡的表徵研究了各制備因素的影響，研究結果表明：澱粉納米粒的粒徑及粒度分佈主要受微型反應器的界面強度控制，而影響界面強度的因素主要是r值（即水與表面活性劑的摩爾比值）及澱粉液濃度。
  3. When sulphurisation time is 30 minutes and sulphurisation temperature change from 180 to 240, the atomic ratio s / sn of the films increases from 0. 72 to 1. 08 and energy gap of the films increases from 1. 44ev to 1. 48ev with the increasing of the sulphurisation temperature

    當硫化時間為30分鐘硫化溫度在240 ~ 310之間變化時，薄膜的s / sn值隨著硫化溫度的升高從1 . 08上升到1 . 96 ，能帶間隙隨著硫化溫度的升高從1 . 01ev上升到1 . 72ev 。
  4. This paper makes a systemic research of the sn ratio of the magnetic recording system of vhs mode

    本文將對vhs型錄像機磁記錄系統的信噪比做一次系統的研究。
  5. The ratio of signal level to noise level ( sn ratio ) is a very important index for vtr and the noise is chiefly from magnetic recording system

    信噪比是評價錄像機性能的一個重要指標，而錄像機的噪音主要來源於磁記錄系統。
  6. At last, a magnetic recording system is built with ferrite material which have a high sn ratio. this system can fulfil the demands of all kinds of recording mode for vhs

    最後，將以目前世界最廣泛應用的鐵氧體單晶為材料，設計一個vhs錄像機用高信噪比磁頭系統，使該系統能夠適用於vhs型錄像機各種記錄方式的要求。
  7. When bath temperature t = 40oc, the deposited films have good surface and structure, the composition ratio sn / s is 1, and its direct band - gap eg is 1. 31ev

    當溫度為40oc時，所制備的薄膜具有較好的表面形貌，其成分比sn / s為1 ，薄膜的結晶性較好，且其直接禁帶寬度為1 . 31ev 。
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