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统计算子
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  statistical operator
     Discussion On Irreversible Processes at Nonequlibrium Steady States in Zubarev's Nonequilibrium Statistical Operator Method
     用Zubarev非平衡统计算子法讨论非平衡定态中的不可逆过程
短句来源
     In this paper the problems of linear response of system at nonequilibrium steady state to mechanical perturbations are discussed in Zubarev's nonequilibrium statistical operator.
     本文是用Zubarev非平衡统计算子讨论处于非平衡定态的系统在受到力学拢动时的线性响应问题。
短句来源
     Main conclusions are as follows: Commutation property of the statistical operator and Hamiltonian of steady state has been proved, and the time stationarity of time correlation function of the steady state has also been proved.
     主要结论是:证明了定态统计算子与定态哈密顿对易,从而证明了定态时间相关函数的稳恒性。
短句来源
  “统计算子”译为未确定词的双语例句
     The original learning algorithm of ART2 NN is so complicated that a simplified ART (SART) NN was presented to handle statistical operators data that were used as input vector of NN.
     针对ART2原始算法十分复杂难以应用的情况,提出简化了的SART网来处理作为输入向量的统计算子数据。
短句来源
     PD pulse phase distribution spectrum was compared with spectrum, and 95% fiducial intervals of statistic operators were also summed up.
     比较了局部放电的脉冲相位分布谱图和谱图的差异,并计算了各类放电对应的统计算子95%置信区间。
短句来源
     Using the discharging times and stat. operator on PRPD mode of PD signal, mode-classifying implements based on BPNN and SART are compiled.
     另一方面采用PRPD模式的统计算子作为SART人工神经网络的输入,设计了相应的SART神经网络模式识别程序。
短句来源
     Conclusions are made: recognition rate of BPNN is 95%, and it is respect to magnitude of discharging signal and increases while signal magnitude increasing;
     以PRPD信号模式的统计算子为输入时,BP网络识别率为95%;
短句来源
     The recognition rate of SART neural network is 98%, higher than that of BPNN, recognition rate increasing with the number of signal group.
     以PRPD信号模式的统计算子为输入时,SART网络识别率为98%,识别率随着样本量的增加而提高。
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  相似匹配句对
     P—C. OPERATORS
     P—C.算子
短句来源
     Convexoid Operators
     凸型算子
短句来源
     Statistics
     统计数据
短句来源
     Group Statistics
     分组统计
短句来源
     The expression of the statistical average values is derived in terms of the density operator formalism in statistical mechanics.
     在计算过程中我们用密度算子导出了物理量的统计平均值.
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  statistical operator
The process of evaporation of liquid droplets is described by the nonequilibrium statistical operator method.
      
The comparison of the S-matrix approach with the "nonstationary statistical operator" approach of Zubarev is considered.
      
A theory of nonresonant acoustic absorption in Ising magnets is constructed by the nonequilibrium statistical operator method.
      
Using linear response theory, the effect of electron-atom scattering on the electrical conductivity of a partially ionized hydrogen plasma is studied in the relevant statistical operator approximation.
      
The Liouville-von Neumann equation and a nonequilibrium statistical operator were used to derive a kinetic equation for photons that interact with nonrelativistic electrons in a constant electric field.
      
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In this paper the problems of linear response of system at nonequilibrium steady state to mechanical perturbations are discussed in Zubarev's nonequilibrium statistical operator. For simplicity, only nonequilibrium steady state to the first approximation is examined. Main conclusions are as follows: Commutation property of the statistical operator and Hamiltonian of steady state has been proved, and the time stationarity of time correlation function of the steady state has also been proved. We have derived the...

In this paper the problems of linear response of system at nonequilibrium steady state to mechanical perturbations are discussed in Zubarev's nonequilibrium statistical operator. For simplicity, only nonequilibrium steady state to the first approximation is examined. Main conclusions are as follows: Commutation property of the statistical operator and Hamiltonian of steady state has been proved, and the time stationarity of time correlation function of the steady state has also been proved. We have derived the fluctuation-dissipation theorem with reference to the nonequilibrium steady state. We have shown nonexistence of symmetry with respect to time reversal of the time correlation function of the steady state. We have shown that the breakdown of time reversal symmetry results in the invalidity of the Onsager reciproeity relations for the generalized susceptibility. Since the causality principle is satisfied in the nonequilibrium steady state, the dispersion relations for the generalized susceptibility still holds true, as proved in my paper.

本文是用Zubarev非平衡统计算子讨论处于非平衡定态的系统在受到力学拢动时的线性响应问题。仅限于讨论一级近似下的非平衡定态。主要结论是:证明了定态统计算子与定态哈密顿对易,从而证明了定态时间相关函数的稳恒性。导出了以定态为参考态的起伏耗散定理。证明了定态时间相关函数不存在时间反演对称性。根据定态时间相关函数时间反演对称性破缺,证明了对广义极化率的Onsager倒易关系不成立。根据因果律在定态得到满足,证明了对广义极化率的色散关系仍然成立。

Gradient of temperature and chemical potential can be produced in a semiconductor sample by applying a localized microwave field. The nonequilibrium statistical opertor method is generalized and applied to study the transport coefficients of a hot-electron system with temperature and chemical-potential gradients. The balance equations for center-of-mass momentum and energy of hot electrons are derived, and the expressions of thermoelectric power and thermal conductivity of hot electrons are obtained. The theoretical...

Gradient of temperature and chemical potential can be produced in a semiconductor sample by applying a localized microwave field. The nonequilibrium statistical opertor method is generalized and applied to study the transport coefficients of a hot-electron system with temperature and chemical-potential gradients. The balance equations for center-of-mass momentum and energy of hot electrons are derived, and the expressions of thermoelectric power and thermal conductivity of hot electrons are obtained. The theoretical results from numerical calculation are compared quantitatively with the experimental data of thermoelectric power under a microwave field.

局域微波场的作用会在半导体样品中产生热电子的温度和化学势的梯度.本文推广运用非平衡统计算子的理论方法计算存在温度和化学势梯度的热电子系统的输运系数,得到了热电子质心动量和能量的平衡方程,导出了热电子温差电势率和热导率的表达式.数值计算表明,理论结果与微波场作用下的温差电动势随电场平均功率的实验测量值可以定量比较.

A new PD characteristic vector generation method using of statistical parameters for the artificial neural network input is presented in this paper. According to the statistical properties of PD 2-D spectrums, scale parameter α and shape parameter β of Weibull parameter estimated from PD pulse is amplitude distribution, together with statistical operators S k and K u estimated from PD pulse phase distribution, are used to generate the artificial neural network inputs which is applied to the...

A new PD characteristic vector generation method using of statistical parameters for the artificial neural network input is presented in this paper. According to the statistical properties of PD 2-D spectrums, scale parameter α and shape parameter β of Weibull parameter estimated from PD pulse is amplitude distribution, together with statistical operators S k and K u estimated from PD pulse phase distribution, are used to generate the artificial neural network inputs which is applied to the PD pattern recognition. A lot of simulation experiments of 5 typical artificial defects have been done, and the results of statistical parameter method and data array method have shown that statistical parameter method is feasible to recognize PD patterns

通过研究局部放电二维谱图的统计特性 ,对局部放电脉冲幅值谱图进行 Weibull分析 ,获得尺度参数 α和形状参数 β,从局部放电脉冲相位谱图中估计出统计算子 Sk、Ku ,用以上统计参数作为人工神经网络的输入 ,实现局部放电的模式识别。对设计的 5种典型人工绝缘缺陷进行了大量模拟实验 ,比较统计参数法与表列数据法的神经网络分类结果证明统计参数构造局部放电特征向量的方法能有效地识别放电模式

 
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