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a time variable
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  一个时间变量
     In this method, three shell displacements are first expanded in Fourier series in the circumferential direction, then an infinite number of decoupled partial differential equations containing a spatial variable and a time variable are obtained.
     壳体的三个位移函数首先沿环向展开为Fourier级数,由此得到解耦的偏微分方程,它包括一个空间变量和一个时间变量
短句来源
  一个时变
     A method to determine the three-elements of the one order electric circuit is presented. The method is more convential than the traditional step-by -step way, by a time variable electric circuit, and is more suitable to analyze the dynamic response of complicated one order electric circuit.
     介绍了一种求一阶电路三要素的方法,此方法用一个时变电路求一阶电路的三要素,比传统的分步求解方法简单,特别适合求解复杂一阶电路的动态响应。
短句来源
  “a time variable”译为未确定词的双语例句
     And this fuzzy controller is designed for the deviation of the vapor pressure and the temperature on container's ektexine as its two inputs, its output is a time variable which controls the status of the thyristor.
     考虑到灭菌器腔体内压力蒸汽形成较缓慢、变化率较小、腔体壁温度变化快、压力形成的滞后性以及保证消毒阶段腔体内的蒸汽为饱和状态等特点,设计的模糊控制器以蒸汽压力偏差和腔体外壁温度偏差为输入量,输出量为控制可控硅通断的时间变量。
短句来源
     On the basis of reviewing Kaluza-Klein theory and Space-Time-Matter theory , the dissertation emphasizes on simulating present universe under a "big bounce" model, which contains a time variable cosmological "constant" that is derived from a higher dimension and manifests itself in 4D spacetime as dark energy. By properly choosing the two arbitrary functions contained in the model, a simple exact solution can be easily obtained in which the evolution of the universe is divided into several stages.
     本文在回顾Kaluza-Klein理论和Space-Time-Matter理论的基础上,重点讨论了由Liu和Wesson提出的宇宙大反弹模型(Big Bounce Model)。
短句来源
     If the scale factor a is thought of as a time variable, the initial values of ψ and x for the success of inflation are obtained.
     如果把标度因子a看作时间变量,则可得到成功的暴胀所需的标量场的初值。
短句来源
     In addition, we also introduced a new variable, i.e. letter collection, and a time variable, i.e. cell, in order to check the abstractivity and comprehensibility of implicit learning.
     此外 ,我们还增添了字母集变量以了解内隐学习的抽象性 ,及时间变量 (单元 )以推测内隐学习的理解性。
短句来源
     Communication mechanism is a very important field in the research of mobile agent technology. Based on the active communication algorithm, this paper presents an improved active communication algorithm of mobile agent, which sets a time variable and waiting of Speeding. Under the conditions of mobile Agent move in high-speed, it forces to stop the movement of Agent, avoiding the transmission of information can not be completed in long time, Completing the reliable information transmission.
     通信机制是Agent技术研究的重要课题,该文在移动Agent主动通信算法的基础上,提出了一种改进的移动Agent主动通信算法,解决了可靠通信问题,通过设置时间变量和超速等待,在Agent高速移动的情况下,强迫Agent停止移动,避免消息长时间不能传递的问题,完成可靠的消息传递。
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  相似匹配句对
     A matter of time
     时间纪事
短句来源
     A Time to Kill
     杀戮时刻
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     A.
     弯枝乌头A.
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     A.
     这个问题是由A.
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     TIME
     同步辐射时间分辨荧光光谱技术
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  a time variable
Averaging of the coefficients over a time variable is carried out.
      
Averaging of the coefficients over a time variable is carried out.
      
The gradient holonomic method yields recursion operators that explicitly contain a space variable and a time variable.
      
These methods are iterative by nature, with a time variable serving as iteration parameter.
      
We show that a time variable defined in a previous work, the "probabilistic time," is the variable which yields the backreaction Einstein equations.
      
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The existense of the non—polar local latitude variations of the five I L S stations is proved by analysing the residuals mathematically. And the uncertainty of the conventional international origin (CIO) caused by such variations is also demonstrated, it is pointed out that the uncertain solutions of polar motion and the drifts of the stations are led by the uncertainty of CIO. As a results,the key to this problem is to determine or choosc a proper origin of rhe reference system. 1. Some results of matrix operation...

The existense of the non—polar local latitude variations of the five I L S stations is proved by analysing the residuals mathematically. And the uncertainty of the conventional international origin (CIO) caused by such variations is also demonstrated, it is pointed out that the uncertain solutions of polar motion and the drifts of the stations are led by the uncertainty of CIO. As a results,the key to this problem is to determine or choosc a proper origin of rhe reference system. 1. Some results of matrix operation For convenience, matrix symbols are used in this paper. And theorems of matrix opcration are introduced. The major one is theorem 1.3, that is, if A∈R~(m·n) and r(A)=n, we have r(I-A(A~Т A)~(-1) A)=m-n, where R~(m×n) is the mxn—dimension Euclidean space, A is a matrix with m columns and n lines, and r(A) stands for thc rank of A. 2. Errors analysis The formula L(t)=AX(t)+E(t)is often used for observational error eq- uations, where t is a time variable, L(t)∈R~m is the measured value taken the form of m—dimentional vector, E(t)∈R~m stands for the error of L(t) (include random and systematic ones), X(t)(R~n is the parameter to be determined, and A∈R~(m×n) is an known coefficient matrix. Let V(t)∈R~m express the residuals of the solutions solved with the least square method. (For brevity the variable t is often omitted in the formulas.) Then we have theorem 2.1 V=(I-A (A~Т A)~(-1)A~Т)E and theorem 2.2 if E is a m—dimentional normal distribution N(M, Б), then V is in the same form N (M_v,Б), and M_v=(I-A(A~Т A)~(-1) A )M, Б_v=(I-A(A~T A)~(-1) A~Т)Б(I-A(A~Т A)~(-1) A~Т), in which M, M_v∈R~m are the mathematical expectations, Б, Б_v∈R~(m×m) are the covariance matrixs and I∈R~(m×m) is a unit matrix. 3. The proof of the local non—polar latitude systematic variation With respect to the seriese Δφ(t) of latitude variations publishedby the residuals V(t) are obtained by using the least square method to the equation L(t)=Δφ(t)=AX, where The root—mean—square errors of yearly average in the observational latitude are reasonable, considered to be less than 0″.005, since these of monthly average are estimated to be better than 0″.01. Thus, suppose the covariance matrix of E, Б=0.005~2I. The test of significance is taken for V in the light of theorem 2.2. Consequently the level of significance is much less than 1% so that Mv=(?) (the average of V(t) ) is negated. It is confirmed that E contain the non—polar local systematic errors M(t) which vary with the time variable. We can regard the total M(t) as the drifts of the stations. 4. The uncertainty of CIO Because of M(t), the way to keep CIO by the five ILS stations can not be relized actually. Furthermore, the determination of CIO depends on that of M(t), and inversely, the ascertainment of M(t) is based on that of CIO. Therefore, CIO defined in such a way is undeterminable. 5. Solution and its reference system For the equations L=AX+M, the number of unknown quantities is three more than that of equations owing to M(t). The solutions are not able to be determined then. In accordence with the equations L=AX+M, it is easy to know that if M is certain due to the origin to be certain, we can obtain the solution X. It is the same the other way round. From known X. M and so the origin of the reference system can be gained. Thereby, referring to solutions of polar motion we must point out exactly which point is adopted as a origin. Formerly, the solutions X solved with the least square method were related to the origin which is based on that the drifts of stations M=V are certain. Yymi and Okuda and others tried to solve the problem of secular polar motion by separating M from V. However, as they failed to catch the essence of the problems, their works in fact have only been to transform the solution from the foregoing reference system to those ones in which other points are referred to be the origin but are not any better than the original one. Thus, the problem is the question of choosing a proper reference system actually, that is, defining a suitable origin. It is unable that to define a fixed point related to the earth surface because of the relative drifts among the respective parts of the earth crust.

通过对偶然误差、系统误差和残差关系的分析,证明了ILS五站非极地方系统变化的存在;论证由此而导致CIO的不可确定性;指出参考系原点的这种不确定是产生极移和地方漂移不确定解的根源;因此问题的关键是明确或选择合适的参考系原点。

The semi-group theory and the mathematical distribution theory in particle physics are reviewed. From Einstein's semi-group and Lorenrtz group one can get the rapidity of particle physics. Einstein's semi-group is a kinematical semi-group, as Lorentz group is a kinematic group. The renomali-zation group is a dynamical semi-group. In the mathematical distribution theory, Callan-Symanzik Guation can be Obtained from the invariant under the scale transformation of the semi-group. The parameters in Callan-Symanzik...

The semi-group theory and the mathematical distribution theory in particle physics are reviewed. From Einstein's semi-group and Lorenrtz group one can get the rapidity of particle physics. Einstein's semi-group is a kinematical semi-group, as Lorentz group is a kinematic group. The renomali-zation group is a dynamical semi-group. In the mathematical distribution theory, Callan-Symanzik Guation can be Obtained from the invariant under the scale transformation of the semi-group. The parameters in Callan-Symanzik equation are dynamic one From E.B.Dynkin's theoream, it is easy to prove that the evolution of QCD jets should be described as a Markov branching process if the log (log((?2/^42)) is regard as a "time" variable in momentum space. Since the high energy multiplicity distribution functions of the hadrons are the so-called infinitely divisible. KNO Scaling can be interpreted as the particular manifestation, the first-passage time behaviour. Namely KNO scaling distribution functions can be determined by Callan-Symanzik equation. The mathemati&al distribution of the renormalization semi-group provides a simple recipe to determine the physical distribution functions of the momentum -energy, sea-gull effect, and of the sphericity, thrust, triplicity for the hadron jets.

本文是近年来粒子物理学中应用半群工具的一个集中评述。过去,物理学对半群注意得不够,这里试图作些说明而引起大家的兴趣。现代量子场论的重正化,特别是重正化群方程具有明显的半群特征,由此导出一些分布。爱因斯坦半群是数学家熟知的,也可用于强子分布。在本评述中同时包含作者一部份未发表的工作。

Capacitance fuze builds up a static electric field around the detecting electrods through the action of an oscillator . It can simply be taken as equivalent to a static electric dipoles , and then deduce the field strength at a distance r around the electric dipoles . A solution of Maxwell' s field equations of the electric dipoles in a time-variable field is deduced , thus permitting a comparison between the characteristics of the capacitance fuze and those of other kinds of proximity fuzes . The...

Capacitance fuze builds up a static electric field around the detecting electrods through the action of an oscillator . It can simply be taken as equivalent to a static electric dipoles , and then deduce the field strength at a distance r around the electric dipoles . A solution of Maxwell' s field equations of the electric dipoles in a time-variable field is deduced , thus permitting a comparison between the characteristics of the capacitance fuze and those of other kinds of proximity fuzes . The conclutions arrived at are : Capacitance fuzes using the electrostatic fields possesses better fixed distence characteristics , smaller spread of the burst height and bettr anti - con -cealment property when compared with other proximity fuzes using radiation fields .

电容近炸引信是利用振荡器在探测电极周围建立一个静电场进行工作的。本文将电容近炸引信简化等效为静态电偶极子,求解出其周围空间中距离偶极子为r处的场强。为了和其它原理的近炸引信的物理场特性进行比较,求解出时变场中电偶极子麦克斯韦方程的解。通过分析确认:利用静电场工作的电容近炸引信较之利用辐射场工作的其它近炸引信具有良好的定距特性、炸高散布小并具有反隐身技术的性能。

 
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