sn-a 中文意思是什麼

sn-a 解釋

  • sn : Sn ＝【化學】 stannum （＝tin）; sanitary.
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  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. The effects of different current density on the alloying element content were discussed. based on the results, the optimal process condition was confirmed : pb ~ ( 2 + ) 80 - 90 g / l sn ~ ( 2 + ) 7 - 15 g / l ch _ 4so _ 3 ( dissociative ) 130 - 150 g / l composite additive 12 ml / l current density 2 - 6 a / dm ~ 2

    採用hull槽實驗方法確定了甲磺酸體系電沉積pb - sn合金鍍層的電流密度范圍，並探討了不同沉積電流密度下pb 、 sn合金含量的變化規律。
  3. Sn with 255mm and bf1 with 212mm in height ) from xiniu cave, shennongjia to investigate a decadal - century scale climatic changes of east asian monsoon covering the most part of the last two millenary

    近2000年來氣候變化的研究，對于認識未來氣候變化有重要的意義。作者從神農架犀牛洞採到兩根分別長255mm （ no . sn ）和212mm （ no . bfl ）的石筍。
  4. To generate a key file, type sn - k file

    若要生成密鑰文件，請在命令行上鍵入sn - k
  5. There is a pitt to inspect this sn class locomotive

    機務段里有供檢修機車的地坑。
  6. Based on these experiments, it may be claimed that there is segregation of sn to grain boundaries in 0. 15 % c steel during cooling from a high solution treatment temperature. this segregation reduces grain boundary cohesion, which results in low hot ductility and intergranular fracture

    通過試驗和計算得出: sn在0 . 1swt . % c鋼中發生非平衡晶界偏聚的臨界時間為1245左右，臨界冷卻速率大約為8 / s ，與試驗結果基本一致。
  7. The first is to prove the slln for a subsequence of sn / bn then reduce the problem for the whole sequence to that of the subsequence

    ）的某個子序列服從強大數定律，再把這個結論推廣到整個序列上（如子序列方法） 。
  8. 4. through the galvanostatic charge / discharge experiments with different schedules, it was found that mn ( ) / mn ( ) in acidic media as half - cell in a novel redox flow system is practically feasible in that it has such advantages as low cost, high open voltage, a certain coulombic efficiency with low charge / discharge current, and long cycling life. in the second part, cosn alloy and cu - sn samples were synthesized firstly by h2 - reduction following solid - state reaction between co ( ii ) 、 cu ( ii ) 、 sn ( iv ) 、 and naoh at ambient temperature

    並研究了其分別作為鋰離子電池陽極材料在1mol / llipf6 / ec + dmc電解液中的恆流充放電性能，各樣品均存在較大的首次不可逆容量損失； 10個循環內cu - sn可逆放電容量可保持在280mah / g以上，而第十周時cosn 、 cu6sn5的可逆放電容量分別為50mah / g和60mah / g 。
  9. The sustained release behavior of drug - loaded sn in pbs has been studied, the results show that the in vitro release curve consists of initial rapid release stage followed by slower exponential stage, and the release profiles can be well modeled using a biexponential and biphasic kinetics function. this drug - loaded sn is of controlled release properties

    這種載藥澱粉納米粒的體外整個釋藥過程分為快速釋放相和緩慢相，釋放規律符合雙指數雙相動力學方程，釋藥特點符合緩釋藥釋放原則，即先有沖擊量，後有維持量，具有一定緩釋性。
  10. Sn machine can be used coil, break, cut off. it is a new type machine of small metaller processing

    Sn機集卷、折、剪切於一機，是小鈑金加工的新型機械。
  11. It is a main task of general topology to compare different spaces. mappings which connect different spaces are important tools to complete it. which mapping preserves some special generalized metric space is a basic probleme in investigating generalized metric spaces by mappings. g - first countable spaces and g - metri / able spaces have many important topological properities so to investigate which mapping preserves them is very necessary. in [ 7 ], clnian liu and mu - ming dai prove that open - closed mappings preserve g - metri / able spaces ; whether open mappings preserve g - first countable spaces is an open probleme asked by tanaka in [ 6 ]. in [ 4 ], sheng - xiang xia introduces weak opewn mappings and investigates the relations between them and 1 - sequence - covering mappings. in the second section of this article, we investigate weak open mappings have the relations with other mappings and prove that the finite - to - one weak open mappings preserve g - first countable, spaces and weak open closed mapping preserve g - metrizable spaces. in the third section, we investigate an example to show that perfect mappings do not preserve g - first countable spaces, g - metrizable spaces, sn - first countable spaces and sn - metrizable spaces

    在文獻[ 4 ]中，夏省祥引進了弱開映射，並研究了它和1 -序列覆蓋映射的關系。本文在第二節研究了弱開映射與序列商映射，幾乎開映射的關系，證明了有限到一的弱開映射保持g -第一可數空間；弱開閉映射保持g -度量空間。第三節研究了文獻[ 5 ]中的一個例子，證明了完備映射不保持g -第一可數空間， g -度量空間， sn -第一可數空間， sn -度量空間。
  12. A time scale of the sample sn has been reconstructed by a polynomial fitting with 9 dated ages and further tested by annual band counting results. in general, the fitting polynomial line is consistent with the annual band growth rate except for that the bottom part of the stalagmite ( a height between 196 to 255mm from the top )

    石筍sn通過9個~ （ 230 ） th年齡的多項式擬合建立年代序列，利用清晰可數年層段檢驗表明，除底部（ > 196mm ）外其它時段基本吻合； bf1結合~ （ 230 ） th年齡和年層計數法定年，年層計數結果表明定年在測年誤差范圍之內。
  13. Now, lithium - ion batteries make licoo2 and c to do cathode and anode. compared with the commercialized graphite materials with a theoretical capacity of 372mah / g, metals like sn and a1 have a higher lithium storing capacity

    目前，市場上鋰離子電池採用鈷酸鋰作為正極材料，採用碳為負極材料。商品化的碳材料理論容量372mah / g 。
  14. Maleck wh, piper sn, roehm kd. propofol - induced injection pain : comparison of a modified propofol emulsion and standard propofol with premixed lidocaine. anesth analg, 2004, 99 ( 4 ) : 1076

    張興安，吳群林，聶煌.芬太尼和利多卡因對異丙酚靜脈麻醉作用的比較.中華麻醉學雜志， 2001 ， 21 : 617
  15. Sns has an energy gap of eg 1. 3ev, which is very close to the optimum energy gap 1. 5ev of solar cells, and it has a high absorption coefficient ( > 104cm - 1 ) and a high conversion efficiency of about 25 %. in addition, elements sn and s are abundant and non - toxic in nature

    硫化亞錫（ sns ）的禁帶寬度eg 1 . 3ev ，接近太陽能電池的最佳禁帶寬度1 . 5ev ，在理論上其能量轉換效率達到25 % ;其吸收系數? 104cm - 1 ，用作太陽能電池耗材少;其組成元素s和sn在地球上儲量豐富、廉價、無毒，有很好的環境兼容性。
  16. Zno is a ii - vi wide bandgap semiconductor which is used for various applications such as gas sensors, bulk - acoustic - wave devices, surface - acoustic - wave devices, varistors, light emitting, light detecting devices and so on. undoped and al doped zno thin films have also been widely used in transparent conducting layers because of their higher thermal stability and good resistance against hydrogen plasma processing damage compared with ito ( sn - doped in2o3 ) films

    Zno是一種新型的直接帶隙寬禁帶半導體材料，具有六方纖鋅礦結構，較高的激子束縛能（ 60mev ） ，較低的電子誘生缺陷和閾值電壓低等優點，在uv探測器、藍紫光led和ld等光電子器件領域有巨大的應用潛景。
  17. Theorem 1. 4 let m be a hypersurface with non - zero constant scalar curvature in rn + l spanning a sphere sn - 1 ( r ). if its gauss image lies in the semisphere, then m is a hypersphere cap

    ）為邊界的緊致常純量曲率（非零）超曲面，如果其高斯映照像落在一個以s ~ （ n - 1 ） （ r ）為邊界的半球面內，則m只有超球面蓋。
  18. Nasa ' s stardust craft passed through the dusty shroud of a comet called wild 2 in 2004 and last january dropped to earth a canister of the material that the mission had collected ( sn : 3 / 25 / 06, p. 182 : http : / / www. sciencenews. org / articles / 20060325 / fob7. asp )

    美國國家航空航天局的「星塵」號飛行器2004年穿過一顆名叫「維德爾2 」的彗星的彗尾，並於去年一月（ 2005年）返回了地球，帶回了一罐這項任務收集的物質。
  19. A mapping theorem on sn - metrizable spaces

    可度量化空間的映射定理
  20. Xrd reveals a mixture structure of the face - centered cubic and hexagonal close - packed phases. the sn doped makes the electrical conductivity change from insulator to n - type semiconductor

    用共蒸發法制備摻錫的c60薄膜，發現摻入的sn原子的薄膜導電性由原來的絕緣體變為n型半導體。
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