differential variety 中文意思是什麼

differential variety 解釋
鑒定品種
  • differential : adj 1 差別的，區別的；特定的。2 【數學】微分的。3 【物、機】差動的，差速的，差示的。n 1 （鐵路不...
  • variety : n 1 變化，多樣化 （opp monotony uniformity）。2 （各種東西的）雜湊。3 異種；種類；項目；【生物學...
  1. The branch of mathematics known as integral and differential calculus serves as a natural and powerful tool for attacking a variety of problems that arise in physics, astronomy, engineering, chemistry, geology, biology, and other fields including, rather recently, some of the social sciences

    以微積分而著稱的這一數學分支，作為一個自然的強有力的工具解決物理、文、工程、化學、天地質、生物以及包括較為近期的某些社會科學等領域出現的各種問題。
  2. They generally arise when a continuous pressure differential allows blood to flow constantly from a high to a low pressure area, as may occur in a variety of congenital defects, most commonly patent ductus arteriosus, anomalous origin of the left coronary artery, or coronary arteriovenous fistula

    一般出現在持續壓力差使血液從一高壓區不斷流向低壓區時，也可以出現在一些有先天性缺陷的病，最常見的有動脈導管未閉、左冠狀動脈起端異常，或冠狀靜脈動脈瘺。
  3. The safety of transmission line plays a important role in power system safety it is not only the requirement of ensure supply power reliability, but also the necessary precondition of enhance power system stabilization, to remove faulty line quickly and accurately, also keep non - faulty line continuous work when some transmission line faults current differential protection is a kind of simple, reliable and good - selective protection manner to any variety of transmission lines, power system development needs current differential protection apply to transmission lines, moreover the advancement of electric and communication technology enable current differential protection apply to transmission lines firstly, the paper discusses, analyses the research and application transmission line protection in detail, compare the principle and realistic presupposition of general line pilot protections secondly, because conventional current vector differential protection are influenced easily by load current and transitional resistance, in order to at the same time quicken protection act, the principle and criterion include work characteristic of differential protect based on fault component sampled values are studied, results shows that differential protect based on fault component sampled values excels general vector current differential protection in reliability, sensitivity and anti - saturation of current transformer in addition, synchronous current sampling methods at all terminals of line is analyzed and estimated lastly, the principle and criterion. also device design about current sampling values differential protection based on optical fiber communication, which apply to short transmission lines are concretely investigated,

    基於基爾霍夫定律的電流差動保護無論對於何種形式的輸電線路都是一種簡單、可靠、選擇性強的保護形式，電力系統的發展使得電流差動保護應用於線路保護成為需要，而電子、通信技術的發展使得電流差動保護應用於輸電線路成為可能。首先，本文對目前線路保護的研究和實際應用情況進行了討論和分析，比較了常用線路縱聯保護的實現原理和實現條件及優缺點。其次，針對常規相量電流差動保護易受正常負荷電流和故障過渡電阻影響的缺點，同時為加快差動保護的動作速度，對基於故障分量瞬時采樣值電流差動保護的原理、判據、動作特性等作了討論和分析，結果表明基於故障分量瞬時采樣值電流差動保護在可靠性、靈敏度、抗電流互感器飽和方面明顯優于常規相量電流差動保護，對電流差動保護各端的同步采樣方法和數據通信也進行了分析和評價。
  4. A variety of mathematical models based on continuous equation and the momentum equation and many solutions partial differential equation value computational method in the open canal turbulent flow solution, still could widely apply and yield the satisfactory result

    但是，非穩態的navier - stokes方程對于明渠水流的瞬時運動還是適用的，以連續方程和動量方程為基礎，建立的各種數學模型和許多求解偏微分方程的數值計算方法在明渠紊流的求解中仍能廣泛應用。
  5. A presentation of the fundamentals of modern numerical techniques for a wide range of linear and nonlinear elliptic, parabolic and hyperbolic partial differential equations and integral equations central to a wide variety of applications in science, engineering, and other fields

    本課程講授求解不同線性及非線性橢圓、拋物線及雙曲線偏微分方程式與積分方程式等之現代數值技巧基礎，並強調在許多科學、工程及相關領域上的應用。
  6. Simple manipulator may do not outer connect signal or connect one - way measure signal namely can direct control operation signal output by keystroke operate, apply to differential kinds of a variety of valve manual locating control, display screen indicates measured value or output percentage, which can be self - set by customer

    Wp - ks805系列智能雙迴路串級pid調節控制儀採用先進的微處理器進行智能控制。具有多種輸入信號切換功能和雙屏數碼雙光柱顯示型式。可選擇rs232 rs485串列通訊介面，並可實現多機通訊。
  7. Singular boundary value problems for nonlinear ordinary differential equations, which arise in a variety of areas such as mechanics, boundary layer theory, diffusion and reaction equations, biology, ect, become an im - potant topic in ordinary equations fields

    非線性常微分方程奇異邊值問題來源於力學，邊界層理論，反應擴散過程，生物學等應用學科中，是微分方程理論中一個重要的研究課題
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