useful resistance 中文意思是什麼

useful resistance 解釋
有益阻力
  • useful : adj. 1. 有用的，有益的，有效的，有幫助的。2. 〈俚語〉值得稱贊的，精通…的 （at）。adv. -ly ,-ness n.
  • 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。
  1. As a newly developed high - performance ship, wave piercing catamaran ( wpc ) has been applied and investigated more and more extensively. in this paper, the theoretic calculation method of wave resistance of a kind of wave piercing passenger catamaran with 500 passengers has been researched, including the ship lines optimization ; the fast speed experiment research work and the research of the relation between the principal dimensions and the resistance. the relation between the wave piercing catamaran and the ship form parameters has been further researched, and also some useful theoretic basis and practical means have been provided for its practical engineering appliance

    本文以「 500客位穿浪雙體船」為研究對象，對穿浪雙體船興波阻力理論計算和船型優化方法進行了研究，其主要研究內容如下：一、穿浪雙體船的線型優化二、穿浪雙體船快速性理論與試驗研究三、穿浪雙體船主尺度與快速性的關系通過以上內容，較深入的研究了穿浪雙體船船型參數與快速性的關系，為其在實際工程中的應用提供了理論依據和解決方法。
  2. The macro model of drift region resistance was established based on the solution of poisson ’ s equations and continuity equations. by the combination of spice mos ( level = 3 ) and the macro model, the complete dddmos model was then obtained, which accords well with simulated data. by simulating and comparing different devices of different process parameters, the model is applicable for different bias regions and can be useful in the power integrated circuit research in future

    首先介紹了器件建模的基本原理及相關模擬技術，然後利用工藝模擬軟體生成器件基本結構，並對其基本特性進行了分析;分析了業內和學術界比較通用的高壓器件建模的方法，隨后在模擬實驗的基礎上著重分析了dddmos的物理特性，在求解泊松方程、連續性方程等基本方程的基礎上，建立有物理意義的漂移區電阻的宏模型;隨后結合spicemos （ level = 3 ）模型而得到完整的dddmos模型，此模型與模擬數據符合得比較好，通過對不同工藝參數的器件進行模擬比較，該模型能夠覆蓋不同的工作偏壓范圍，具有較明確的物理意義，對今後的功率集成電路的研發有一定的參考意義。
  3. The heat - exchange apparatus is the window for air - conditioner to exchange energy with outside. we analyze the efficiency of heat - exchange apparatus by the theory of heat - transmit, and compare the advantage and disadvantage of different type evaporator ' s and condenser ' s design by lots testing, and compare the effect of heat - exchange for different type flake, and compare the effect of heat resistance for different stretch of copper tube and flake. then we get many useful results from those different comparing

    蒸發器與冷凝器統稱為換熱器，換熱器是空調器與外界進行能量交換窗口，利用傳熱學原理對換熱器的效率進行分析，通過大量的試驗比較不同的蒸發器，冷凝器設計方案的優劣；比較冷凝器使用不同片型對換熱效果的影響；比較銅管與翅片的不同脹緊對熱阻的影響，通過比較得出很多有用的結論。
  4. Although not a precision instrument, the ohmmeter is a useful device for rapid measurement of resistance.

    歐姆計是一種很有用的儀表，可以用來迅速地測量電阻，盡管它不是一種精密儀表。
  5. According to reference, this research is the first time to transfer practically productive aim - gene to tetraploid black locust, and it is also the first time to transfer badh gene to forest - tree. this research provide a useful way in improving resistance to soline - alkali and drought of forest tree

    據資料檢索，該研究屬首次將具有生產意義的目的基因導入四倍體刺槐，也是首次將甜菜堿醛脫氫酶基因導入林木樹種，在培育耐鹽抗旱型林木品種方面進行了有益的探索。
  6. In non - selfsustained discharge the excitation and ionization processes can be controlled separately, which is useful to optimize the e / p value of the discharge. the ballast resistance can be leaved out and the maximal electro - optical efficiency reaches 19 %

    非自持放電使激光器的激發和電離過程分開，有利於使二者分別處于各自的最佳e p值附近，放電的正阻抗特性使放電電路可以省去限流電阻，極大地提高激光器的實際效率。
  7. The result of the calculation for tip clearance is reasonable when it is compared with theory. two ways are put forward for convention of dimension of the turbine components from high temperature to low one, which is related with tip clearance, a simple example is used to illuminate that the two ways are useful, using the method of design optimization, axiisk and a blade of a certain turhine is analysed, it showes that the method of design optimization is feasible to be used for convertion of dimension of the turbine components. finally, ansys software is used to analyzed the variation of tip clearance with the method of cyclic symmetry analysis when engine works under the conditions of temperature and rotational speed, am using a new method to deal with thermal contact resistance in the calculation

    本文完善了計算渦輪葉尖間隙的簡化演算法程序，增加了程序的計算功能，並將其應用於某高壓渦輪進行葉尖間隙分析，所得結果與理論結果進行了對比，得出修改後的程序用於葉尖間隙計算是合理的；同時提出了與葉尖間隙相關的渦輪典型部件的冷、熱態的尺寸兩種換算方法，使用優化設計的方法進行了實例分析，說明了所提出的計算方法是可行的；最後應用ansys有限元軟體利用循環對稱的方法分析了某型發動機高壓渦輪在溫度場及離心力作用下的葉尖間隙在發動機工作過程中變化情況，並分析了計算中的接觸熱阻的處理問題。
  8. The resistance of elements increases gradually during their useful life

    該產品的電阻值在其有效使用期限內，阻值是逐漸變大。
  9. By carefully selecting the voltage taps, the correct voltage output to match the resistance of the elements over their complete useful life can be made

    仔細選擇電壓插孔，選擇和電阻相匹配的輸出電壓值，這樣可以延長其有效使用壽命。
  10. Due to the influence of the corrosive agents in the outer environment, the resistance and dynamic reliability of the chemical structures declined with time very fast. and it is difficult for the chemical structures that with the normal design reliability level to fulfil their structural functions. on the condition that the design service life is confirmed, the design reliability level of the chemical structures should include the corrosive environment and its effect on the structures. based on agents ' corrosiveness fuzzy classification, this paper suggests a practical method on design reliability level decision - making of the industrial structures, which is very useful for the anti - corrosion design of the industrial structures

    化工結構由於受到外部腐蝕性介質環境的影響，其承載能力及動態可靠度水平隨使用時間衰減過快，按照普通結構設計可靠度水平設計的工業建築常難以順利完成設計使用功能.因此，在設計基準期預先確定條件下，化工結構的設計可靠度水平應綜合考慮腐蝕性環境及其對建築結構的影響特點來決策.根據介質腐蝕性模糊分級，提出了工業建築設計可靠度水平的一種實用決策方法
  11. Lastly, two axially loaded bored piles in some building site near xichang city was calculated with the method and some useful data and curves including load - settlement curves and distribution of friction resistance etc. are presented. the accordance between the results of calculation and in - situ test verifies the validity of the method developed in the paper

    通過計算，得到相應的荷載?沉降曲線、軸力圖、樁側阻力圖、塑性區、土的豎向位移等值線、樁的滑移過程等結果，並與現場試驗結果吻合較好，說明用本文方法計算分析樁基的工作特性是可行和有效的。
  12. If you ever get the chance to wear - resistance brick your english with people from different countries it will be useful to be able to describe aspects of chinese wet grinder, such as the spring festival, to them

    如果阿里巴巴有機會稱雄國內互聯的話，那種可以向阿里巴巴馬雲細述阿里巴巴之類的中國文化的能力頗有用處。
  13. The gd and ge gene was subcloned into puc18, resulting in pugdge. the fragment from pcdnas. 1 - including hcmv promoter / enhancer, mcs and neomycin resistance gene was inserted into the bamhi and bsteii restrication sites of pugdge, resulting in the universal transfer vector pgd - m - ge. the universal transfer vector pgd - m - ge has deleted the gi gene and 363bp in the 5 ' end of the ge orf of prv. there were 11 restrication sites for insertion of the foreign gene. the upstream and downstream flanking sequences were up to 1. 25kb and 1. 42kb. it will be useful for developing the recombinant prv expressing foreign gene ( s )

    將gd 、 ge基因連接于質粒puc18獲得pugdge ，缺失質粒pugdge的bamh和bste位點間391bp的片段。在此缺失位置插入來自質粒pcdna3 . 1 -的一偽狂犬病病毒gd 、 ge 、 tk基因的克隆與通用轉移載體的構建段含hcmv啟動子。多克隆位點和neo報告基因的片段，構建了通用轉移載體ppd m pe 。
  14. Abstract : the requirement of the electrical control system of press is introduced, the formation of its plc control system and interference resistance method for designing program are demonstrated as well. fact shows that it is a useful control system

    文摘:介紹了陶瓷全自動液壓壓磚機的電氣控制要求， plc控制系統的組成，程序設計及抗干擾措施，這是一個實用的控制系統。
  15. Mems switches based on metal - metal contact are useful in a variety of power management information processing and communication systems because their on resistance is lower than that of semiconductor switches and their off resistance and transmission frequency are higher than that of semiconductor switches

    在自動測試、控制系統、通信系統的信號通路等領域有著廣泛應用潛力，同時， mems開關是微機械技術中的一類有代表性的結構，是很多微機械器件的基礎。
  16. And pcr - rflp analysis was a sensitive, rapid and simple assay for the detection of nucleotide sequence change in ser 83. and our data sugget that pcr - rflp may be a useful device for detecting the mutation in gyra gene associated the resistance to fqns

    本研究通過試驗條件的篩選，建立了pcr - rflp檢測豬源致病性沙門氏菌gyra基因點突變的方法，可用於沙門氏菌氟喹諾酮類耐藥性的分子水平檢測和流行病學監測。
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