negative resistance effect 中文意思是什麼

negative resistance effect 解釋
負電阻效應
  • negative : adj 1 否定的 否認的；拒絕的 （opp affirmative）； 反對的 反面的；消極的。2 （opp positive） 【電...
  • resistance : n. 1. 抵抗，反抗，抗拒，抵禦；敵對，抵抗力，反抗力，阻力，【生物學】抗病性。2. 【電學】電阻；阻抗；電阻器。
  • effect : n 1 結果。2 效能，效果，效力，效應，作用，功效；影響。3 感觸，印象；外觀，現象。4 旨趣，意義。5 ...
  1. Mdr1 express product p - glycoprotein was detected by immunocytochemical method and flowcytometry. the cytotoxicity and multidrug resistance reversion effect of tea polyphenol was examined by mtt assay in mcf - 7 and mcf - 7 adr carcinoma cell lines, and compared with pgp inhibitor quinidine. the pgp expression of mcf - 7 adr was strongly positive, the positive rate was 15 % ; the pgp expression of mcf - 7 was negative, the positive rate was 1. 8 %. ic50 of tea polyphenol to mcf - 7 and mcf - 7 adr is 115. 2g ml and 207. 6g ml respectively. ic50 of quinidine to mcf - 7 and mcf - 7 adr is 129. 8mol l 42. 1g ml and 94. 1mol l 30. 5g ml respectively. tea polyphenol and quinidine changed little toxicity of adriamycin to mcf - 7, but tea polyphenol and quinidine improved the sensitivity of mcf - 7adr to adriamycin significantly. immunocytochemistry and flow cytometry can detect p - glycoprotein expression level qualitatively and quantitatively. tea polyphenol is not only an anti - tumor agent, but also a multidrug resistant modulator similar as quinidine. tea polyphenol is advantageous for its little toxicity in tumor treatment

    用免疫組化法和流式細胞儀對腫瘤細胞系mcf - 7和mcf - 7 adr的p -糖蛋白表達水平進行定性定量研究。用噻唑藍比色法mtt研究茶多酚的細胞毒性及其對耐藥性的逆轉作用，並與pgp抑制劑奎尼定進行了比較。免疫組化法檢測p -糖蛋白表達水平， mcf - 7 adr呈強陽性，而mcf - 7呈陰性流式細胞儀定量檢測結果mcf - 7 adr細胞系細胞陽性率為15 % ， mcf - 7細胞系細胞陽性率為1 . 8 % 。
  2. ( 3 ) it is known that load effect is not consistent with the section resistance incommon section continuous composite beam. a kind of composite beam with itsrational section size is suggested, which is consist of the t shape concrete beam andsteel girder. this kind of composite beam not only has enough carrying capacity, almost has same positive and negative resistance moment, but can decrease theamount of the steel

    （ 3 ）分析可知連續組合梁的跨中、支座截面處荷載作用效應及截面抗力規律不匹配，本文提出了採用t形混凝土梁和工字鋼代替一般的混凝土板和工字鋼的組合梁截面形式，並給出了截面尺寸比例，能使正負截面抵抗矩接近，符合組合梁受力特徵，減少了材料用量，滿足承載力和剛度等要求。
  3. In effect, a negative resistance is inserted in the circuit so that its total resistance is zero.

    實際上，這就是把負電阻接入電路，使電路的總電阻為零。
  4. All the experiment analyses are presented in chapter 3, including the lodging of negative resistance effect based on the measurement of the parameters of ga - diffusion trans

    結構中近硅表面微區域濃度的變化規律， ga擴散過程的三個階段包括預沉積、再分佈和二次氧化，對應于ga在a
  5. The main work and conclusion for this paper is as following : according to the flashover test results of several kinds of iced insulators under positive voltage and negative voltage, this paper obtained : for the single porcelain insulator, the single glass insulator and the composite insulator bridged completely by icicle, the metal cathode ' s strong ability of emission electron is the primary reason that results in the lower negative flashover voltage ; the position difference of the high resistance district in method anode side results in that porcelain insulator cluster and glass insulator cluster have an evident effect of polarity ; when less ice and no icicle at the brim of the sheds, due to numerous non - polar arcs on the composite surface, the effects of polarity of composite insulator was lost using the test method of the average flashover voltage in the freezing period, dc flashover performances were investigated of several insulators with some typical structures and different material

    本文的主要工作和結論如下：在人工氣候室內，根據不同覆冰絕緣子正、負極性下的閃絡試驗結果，得出負極性電弧金屬陰極的強電子發射能力造成了單片瓷、玻璃絕緣子及被冰凌橋接的合成絕緣子有較低負極性冰閃電壓；正極性電弧金屬陽極側產生高電阻區所處位置的差異使得瓷和玻璃絕緣子串具有明顯的極性效應；覆冰較少時，合成絕緣子表面出現數量較多的非極性電弧使合成絕緣子無極性效應。利用覆冰期內平均閃絡電壓的試驗方法，對不同材質和結構的絕緣子在覆冰、低氣壓和污穢共存環境中的直流閃絡特性進行了研究。試驗結果表明，直流平均閃絡電壓隨著海拔的升高、覆冰量的增加以及污穢度的增加而降低，且其特徵指數與絕緣子結構、覆冰量、覆冰狀態、污穢度等有關。
  6. Negative resistance effect

    負阻效應
  7. The junction voltage decreases with the increase of current above 10ma. there is an effect of the negative resistance

    當結電流增至20ina以後，隨電流的增加，結電壓減小，出現負阻現象。
  8. Current research of the technique of ga diffusion and the negative resistance effect of open - tube ga - diffusion transistor are emphasized

    重點介紹了目前開管ga擴散工藝的發展現狀和開管擴鐮晶體管負阻效應的研究現狀。
  9. Even though much has been devoted to the research of it, the mechanism of the negative resistance effect and the effective means to reduce it are rarely reported

    盡管前人對負阻現象作了不少研究，但負阻存在的機理、減小負阻的有效措施等問題卻鮮見報道。
  10. Yet the outstanding shortcoming of open - tube ga diffusion is the apparent negative resistance effect in the ic - vce characteristic curve, which is not what we hope

    盡管如此開管擴鎵的突出缺點是在特性曲線中的負阻效應較為明顯，負阻現象的存在是我們不希望的。
  11. The u - i properties of the samples at room temperature and cryogenic temperature ( 77k ) were measured by three - point method, and it was found that there is an effect like negative resistance in such multilayer films

    本文採用三點法測定了常溫、低溫下的u - i特性，發現常溫、低溫下納米量級的硅氧化硅多層膜具有類似負阻的特性。
  12. The device structure and physical models of 4h - sic mosfet and mesfet are built and the properties are simulated with the use of medici software. the influence of the temperature and structure parameter on the device ' s properties is summarized indicates that no negative resistance exists in breakdown property and the breakdown voltage is up to 85v and 209v separately. the maximum power density of 4h - sic mesfet is as high as 19. 22w / mm. at the same time, the processes of sic field - effect transistor is studied and the fabrication processes suitable to sic mosfet are developed.

    論文分析建立了4h - sicmosfet和mesfet器件的結構模型和物理模型，採用二維器件模擬軟體medici對4h - sicmosfet和mesfet的輸出特性進行了模擬分析，研究了溫度和結構參數對器件特性的影響，表明兩種器件的擊穿特性均沒有負阻現象，擊穿電壓分別達到85v和209v ，由此得到4h - sicmesfet最大功率密度可達到19 . 22w mm ；同時，研究了sic場效應晶體管的製作工藝，初步得到了一套製造sicmosfet器件的製造工藝流程，研製出了4h - sicmosfet器件。
  13. In this calculation, a negative physical resistance is treated as 0 % to prevent it from increasing the effect of the crushing blow

    在此計算中，負的目標物理抗性被當作0 %來避免它增加粉碎性打擊的效果。
  14. The passage analyze the negative effect of migration on the income gap, describe the motivations, constraints and characteristics of migration, then analyze the discrimination on migrants in urban labor market and other aspects in a political economy approach. we find and criticize the reasons that urban interest groups discriminate the migrant in the neoclassical growth theory and public expenditure theory approach. the resistance of migration changes from non - historical normal institutions ( such as huko system ) to historical abnormal institutions ( such as employment discrimination )

    本文分析了人口流動對我國城鄉收入差異的消極影響，描述了我國人口流動的動機、限制條件以及特點，並給出了流動人口在城市勞動力市場及其它方面遭到歧視的政治經濟學分析，我們從新古典增長理論和公共支出理論給出了城市利益集團歧視農村流動人口的理由，並對此進行了批判;指出人口流動的阻力從非歷史性的正式制度（戶籍制度）向歷史性非正式制度（就業歧視）的演進。
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