查询词典 existence of extremum

In rectilinear motion,the extremum of pullvaries with the factor;angleθ=α=arctgμ(μ:friction factor;angleθ:the angle between the direction of pull and the motion direction).

在直线运动中拉力 F的极值随摩擦系数μ的变化而变化，当θ=α=arctgμ(μ为摩擦系数，θ角为拉力 F和运动方向的夹角)时，F有极小

The term "gray" is locating the point of relative extremum in graph which shows base color terms distribution about five literatures.

对颜色词"灰"的构词能力和语义做出分析，提出假设：随着人眼的视觉逐步趋于完善，颜色词"灰"也随之在语言上产生和发展。

If considering the second order variation, we can further analyze it and prove that this extremum is a minimum for the stable equilibrium status.

如果考虑二阶变分，进一步的分析证明，对于稳定平衡状态，这个极值是极小值。

The shortest confidence interval of parameter of Gamma distribution is in practice a question of conditional extremum. It can be transferred to a group of equations that can be solved by a method of numerical value.

Γ分布中未知参数θ的最短置信区间实际上是一个条件极值问题，它能转化成一个方程组可用数值方法迭代求解。

To draw up the extremum is unexhausted.

关于K值的逼近，怎样才能达到极值点，尚需进一步研究。

An improved Particle Swarm Optimization algorithm is proposed in this dissertation by eliminating the paticle velocity variable and adding an extremum trembling operator.

实验表明这两种方法比中值滤波及其它改进方法具有更好的滤波性能。

The practice of predicting natural fracture zones in deep formation in An Peng oilfield indicates that the extremum main curvity method has definite reliability in predicting pull apart fractures of homogeneous terranes.

安棚油田深层系预测天然裂缝发育带的实践表明，极值主曲率法在结构均一岩层构造拉张裂缝的预测中具有一定的可信度。

According to the analysis of reasons of transformer mal-operation in Pingdingshan Electric Power Bureac for years , and according to the present situation of transformer protection studies and applications at home and abroad. This paper points out the shortcomings of discrimination between internal faults and magnetizing inrush, the problems existing in differentiating the slight faults of turn-to-turn in transformer are also advanced. On the base of the electromagnetic characteristics of transformer, the relations between fluxional differential current and voltage of source side analyzed, all the operating states of transformer simulated by EMTP/ATP, the criterion of magnetizing inrush in transformer is got. Through the wavelet analysis of current waveform, using the intense reaction of wavelet transform to the little change of signal, the internal faults of transformer are distinguished by testing local extremum.

本文根据平顶山市电业局历年来变压器保护误动的原因分析，并根据国内外变压器保护使用和研究的现状，指出了现有变压器保护在区分变压器励磁涌流和内部故障方面以及在判断变压器匝间轻微故障方面存在的问题和不足；从变压器电磁特性出发，分析了电源侧电压和电流微分之间的关系，利用电磁暂态仿真程序对变压器各种运行状态进行了仿真，并以此建立了判断变压器是否含有励磁涌流的判据；通过对电流波形的小波分析，利用小波变换对信号微小变化极强的反映能力，通过检测电流的局部极值点来区分变压器运行状态，并作为上述判据的补充。

In view of this problem,a parameter extremum optimization model is developed,in which such error factors as the decaying DC components,nonsynchronous sampling and harmonics are precisely depicted.A new measuring method based on the hybrid genetic algorithmis developed to use this model for finding accurate power system parameters such as the amplitude,phase,frequency and harmonics.

针对这一问题，建立了电力参数极值优化模型，同时对衰减直流分量、非同步采样及谐波等多个误差参数加以精确表示，利用混合遗传算法对该模型进行求解，可得到准确的系统幅值、相位、频率及谐波等电力参数。

The planimetric position of the piles which endure the extremum axial force is different.

受开挖区域的影响，承受轴力最大值、最小值桩体的平面位置是变化的。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。