最小值

By using Hamilton graph ,the problem of wagons placing-in and taking-out on branch-shaped sidings can be turned into searching Hamilton loop of minimum power.

运用图论中的哈密尔顿图，可以将树枝型专用线取送车问题，转化为求哈密尔顿图中权值最小的哈密尔顿回路问题。

The fitting function is established based on the characteristics of the retarders,and the retardations of all wavelengths and all voltages in the working condition of the retarders are obtained by the least-square curve fitting.

根据延迟器件的特性，建立了相位延迟的拟合函数公式，采用最小二乘曲线拟合的方法得到了延迟器件工作范围内全部波长、全部电压值下的相位延迟，曲线拟合的标准差＜0.02λ。

During practical process operation, it is often difficult to implement optimal control, since operating pinch point and the minimum temperature difference deviate from the design values.

在实际的生产中，换热网络的操作夹点和最小温差与设计值往往不尽相同，为换热网络的优化控制带来了一定困难。

Fitting curves are in good agreement with the experimental results,the calculated kinetic parameters are in good agreement with those reported in term of modeling of the pyrolysis of the three components assuming hemicellulose,cellulose and lignin pyrolyzing independently and para...

采用非线性最小平方算法，按三组分独立平行一级反应热解动力学模型，模拟计算的曲线与实验结果吻合较好，求解的动力学参数与文献报道值吻合较好，且随着升温速率的加快，纤维素和木质素热解的活化能有增加的趋势，而半纤维素活化能有下降的趋势。

Since DDA is still under development, one of concerns is how to improve block displacement functions so that the block stress precision can be improved.

第四章进一步研究基于自然邻接点插值法的DDA方法，对比了其与移动最小二乘法的优劣，表明前者计算效率更高，缺点是需要处理特殊网格生成。

Among those changes, CARAT＇s brightness showed a minimal change; a gradual stability of chromatics was presented and was limited within a certain range though the augment of opaques.

结论不透明层在达到一特定厚度时可完全遮盖底层金属色，其中CARAT组的这一厚度值最小，遮色能力相对较强。

When the strength of the magnetizing field is lower than 40-50 oersteds, the curve showing the dependence of internal friction on magnetic field strength is almost flat, and becomes steeper for a higher field strength.

当磁场强度小於40—50奥时，内耗随着磁场强度而变化的曲线几乎是平的，其后则变化较快，在超过约150奥时，内耗的变化又渐越平缓，最后达到一个差不多恒定的最大值。

Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor's optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting pulsation attenuation at single point. For this reason, a distributed active control method of fluid pulsation was presented. To avoid stationary point in all aviation states, several fluid pulsation actuators and error pressure sensors were placed along the piping. The second fluid pulsation produced by actuators can counteract the primary pulsation brought by aviation piston pump and make the mean pulsation of whole piping minimum when adopting adaptive feed- forward control and the filtered-X least mean square algorithm.

针对飞机液压能源管路系统中的周期性流体脉动诱发流固耦合振动，导致管路疲劳损伤的问题，针对管路中存在压力驻波特性，在采用单点消振时寻找误差传感器最佳布局位置困难而引起脉动抑制效果不理想的缺点，提出了一种分布式流体脉动主动控制方法，即沿管路不同位置布置多个主动消振阀和误差压力传感器，在任意飞行阶段，避开压力驻波点，以误差压力传感器的脉动测量值为控制目标，采用一种针对周期脉动主动控制的自适应前馈控制法和多通道自适应滤波－X LMS算法，调整控制器参数，使主动消振器产生的次级脉动与管路中的初始脉动相互抵消，达到整个管路中的平均流体脉动最小的效果。

An explicit analytical solution of the threshold pump power of the laser has been derived based on rate equations which contain the attenuation coefficients of the pump and laser radiations as well as the major contribution of the re-emission of the upper level atoms to the pump wave by using the analytical solutions. An analytical solution of the minimum fiber length required for the onset of the oscillation is presented. In addition, the analytical solutions describing the variations of the density of the pump radiation and upper laser level population along the fiber length have also been given.

从速率方程组出发，在不忽略光纤损耗系数和保留再发射项主导部分的近似条件下推导出了双包层光纤激光器阈值泵浦功率的显函数解析表达式，得到了光纤激光器产生振荡所需的最小光纤长度的显函数解析解；还给出了泵浦光子数密度和上能级粒子数密度沿光纤方向随光纤长度变化的显函数解析解。

This paper gives a thoeretical analysis on the standard currently adopted in China for the widening of railway track gauge on curves, and points out that this atandard does not tally with the railway oparational actuality, the calculation data used are not in conformity to the present rolling stock conditions in this country and that the marginal radius and the amount prorided for the widening of curved track gauge are on the large side.

本文对我国现行曲线距轨加宽标准进行了理论分析，指出它脫离运营实际，而采用计算数据又不符合我国现有车辆情况，加宽起始半径和加宽值都偏大。提出在理论上比较切合实际的计算方法是车辆按力学自由內接条件计算；机车和少数固定轴距大的车辆，按最小运营半径条件检算，制订我国的曲线轨距加宽新标准。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。