查询词典 approximation

The error analysis of asymptotic approximation of finite series expansion is also given. Ourmethod avoids choosing the integral length of the reentrant corner, and can be used tocalculate the charge of the conductor conveniently and efficiently.

该算法克服了邓肯矫正需要选择角点积分区域的不足，有效地校正了导体角点奇异性引起的电容参数提取的计算误差，且计算精度与稳定性都比较好。

Secondly, a asymptotic approximation formula of structurefailure probability is presented in generalized stochastic space with correlatedrandom variables by the asymptotic method of Laplace integral, by which the failureprobability and risk analysis on the chamfered vertical breakwater have been done.

其次，利用Laplace型积分的渐近计算方法，还推导出了广义随机空间相关荷载变量作用下结构失效概率的一个新的渐近计算公式，并依此算法对削角直立堤进行失效概率的计算以及风险评估。

Under the assumption that the channel state information was available only at the receiver,the capacity of MIMO systems in Rayleigh fading channel was investigated on the basis of information theory. Three special expressions for the MIMO capacity over ergodic flat fading channel were derived.An asymptotic formula for MIMO systems with equal number of transmit and receive antennas in small SNR was also given. Simulation results show that this approximation is relatively accurate.

以信息论的观点为基础，在假设信道状态信息仅收端已知的情况下，采用等功率发射方案，研究了瑞利衰落信道下MIMO系统各态历经信道容量，推导了三种特殊MIMO信道的各态历经信道容量表达式，以及在小信噪比下等收发天线MIMO系统的容量近似公式，并通过仿真进行了验证，仿真结果表明该近似公式比较精确。

Equidistance point and difference theory in theory of function approximation are studied. Meanwhile, the relation among difference, difference quotient and derivate is revealed. By drawing Lagrange's and Cauchy's theorem of mean on difference and Taylor's formula into difference function, four theorems, such as Lagrange's theorem of mean on difference, are concluded in simple way. On the basis of these conclusions, the asymptotic property of middle point is studied, a series of new conclusions are drawn and the discussions on the asymptotic property of middle point in differential mid-value are summarized.

对函数逼近论中等距节点和差分理论进行了研究，揭示了差分、差商与导数之间的联系；将Lagrange中值定理、Cauchy中值定理、Taylor公式引入到差分函数中，简明地推导出Lagrange差分中值定理等4个定理，并在此基础上对"中间点"的渐近性进行了研究，得出了一系列"中间点"的渐近性的结果，概括了有关文献对微分中值公式的"中间点"的渐近性的讨论；给出的引理改进了函数逼近论的证明方法，精简了函数逼近论中的一些内容。

In MA models, the likelihood function is so complicated that we just search a better estimate value in a range. Another method introduced is autoregression approximation method.

在滑动平均模型中，由于似然函数形式很复杂，这里采用逐一搜索的方法，本文介绍的另一种估计方法是自回归逼近方法。

The determination of Avogadro Constant many ways, using oil-drop experiment, electrolysis, X-ray diffraction of different options, the measured values are different, 602 × F1023 mole -1 is only an approximation.

实验测得其数值约为602×F1023。阿佛伽德罗常数的测定方法很多，采用油滴实验、电解法、X射线衍射等不同方案，测得的数值不尽相同，602×F1023摩尔－1只是近似值。

The axiomatic system in Pawlak rough approximation space is studied by use of matrix expression of fuzzy relation and its operation.

利用模糊关系及其运算的矩阵表示，建立Pawlak粗近似空间的公理体系，该公理系统由三条相互独立的非常简洁的表达式构成。

An independent axiomatic system that describes the upper approximation of Pawlak rough sets is formulated by three simple formulas.

获得的结果深刻地揭示了经典等价关系与模糊等价关系的本质区别，进一步深化了Pawlak粗集理论。

As a concrete Banach space, it is applied in best approximation, and optimal control problems.

所以，对Orlicz空间几何性质的研究就显得比较重要。

By use of ANN model trained under normal circumstance, inner and outer bus fault can be distinguished clearly. For the research on bus protection theory based on function approximation ability of ANN, it is crucial to establish the functional relation between the input and the output of bus protection object.

在研究基于ANN函数逼近能力的母线保护原理的过程中，首先就母线保护物理对象的输入输出之间的函数关系进行了研究，将物理对象的输入定为母线上各回路电流互感器传变后的同一时刻二次检测电流，输出定为母线上各回路的一次侧同一时刻流过的电流之和。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。