查询词典 optimal path

The paper describes the optimal design mathe matical model establishing of main parameters and the choice of optimal method about internal gear slotting cutter.

文章论述了直齿内齿轮插齿刀主要参数优化设计数学模型的建立，优化方法的选择，并通过实例计算验证了内插齿刀的主要参数得到优化。

Optimal gear-driven design is greatly important in modern machine design,the article researched into a new method of optimal gear-driven design based on MATLAB for the purpose of finding a convenient and practical measure.

齿轮优化设计在现代机械设计中占有非常重要的地位，为了能找到一种简便实用的优化设计方法，本文研究了基于MATLAB平台建立齿轮传动的优化设计模型，描述了利用MATLAB优化工具箱解决齿轮参数优化问题的具体方法。

The results showed as follows: 1 Extraction of gelsemium total alkaloids. Total alkaloids were extracted with 95 per cent ethanol. The extract rate was 0.519 per cent and the extract purity were 88.02 per cent and 87.38 per cent; Total alkaloids were extracted with chloroform .The extract rate was 0.416 per cent and the extract purity were 89.02 per cent and 94.52 per cent. 2 Isolation of gelsemium total alkaloids with TLC. Total alkaloids contained five or more alkaloids. The optimal developing agent was chloroform :methanol :ethyl acetate(9:l:0.3),the optimal eluent was methylene chloride:methanol(92:8). 3 Isolation of total alkaloids with column chromatography. Alkaloid A and alkaloid B were obtained, alkaloid B was identified as koumine.

研究结果如下：1、钩吻总碱的提取：用95％的乙醇提取钩吻生物碱提取率为0.519％，其提取物纯度为88.02％、87.35％；用氯仿提取钩吻生物碱提取率为0.416％，其提取物纯度为89.02％、94.52％。2、钩吻总碱的薄层层析分离：总碱中含有5种或5种已上的生物碱；氯仿：甲醇：乙酸乙酯(9：1：0.3)是最佳薄层层析的展开剂；二氯甲烷：甲醇(92：8)是柱层析的最佳洗脱剂。3、钩吻总碱的柱层析分离：共得到两种钩吻生物碱单体成分碱A和碱B，碱B为钩吻素子，碱A可能是钩吻素甲。4、钩吻总碱的急性毒性试验：钩吻总碱小鼠腹腔注射的半数致死量LD_(50是：7.38mg／kg，95％的可信限范围为：6.67mg／kg～7.94mg／kg。

RPA ointment of stable quality could be prepared by adopting the optimal composition of the ground substance and optimal emulsification temperature confirmed in the present study.

结论该研究确定的最佳基质组成与最佳乳化温度可以制备质量稳定的RPA软膏。

In the combined approach, the HAGA determines the optimal displacement ratios and number of fictitious charges used in CSM, and then obtains the optimal contour design of support insulators to minimize and uniform the tangential electric field along the dielectric boundary.

在此复合式方法中，杂凑基因演算法先用来决定电荷模拟法中之假想电荷与配置比之最佳值；然后再用杂凑基因演算法来获得支持碍子之最佳化外型，以便能够将支持碍子介质边界上之切线电场强度分布均匀化且最小化。

Optimal control of DSS formation adjusting based on Hamilton Mechanics and generating function method was investigated. An iterative way of solving the two-point boundary value problem induced by optimal control by relative motion generating function approximation was proposed.

基于考虑J_2项的DSS相对运动Hamilton力学模型和生成函数方法研究了DSS构形调整的最优控制问题，提出了求解最优控制两点边值问题的相对运动生成函数近似迭代方法。

The stability problems are analyzed and discussed. The optimal control problem is formulated to determine the necessary conditions for optimality in networks. Three theorems about the properties of the steady state-costate solution in Hamilton function are confirmed leading to the natrual meaning and the optimal policy which can be implemented in practice. In chapter Ⅴ, the methods for nonstationary simulation of computer networks are discussed.

第四章表述了计算机通信网动态特性研究的主要数字方法；提出了排队与随机存取机制、网络链路传输和节点分流的状态空间模型，并作了稳定性研究；应用最优控制理论得到网络最优控制的必要条件，证明了哈密尔顿函数协状态变量的稳定解性质，据此研究分析了网络最优控制的本质意义及实现途径，并给出计算及建模实例。

The method combing harmonic linearization and integral time absolute error optimal control to realize the PWM converters' optimal control is proposed according to the hysteresis current control's characteristics.

根据滞环电流控制的特点，提出了将谐波线性化方法与ITAE优化控制律相结合的方法，以实现对PWM变换器的优化控制。

Meanwhile, on the basis of simulation model, the paper introduces the concepts of the combination of ship types, combination of berths, hectometer coastline throughput capability and coastline utilization ratio. By using curve fitting, the function between Tw/Tb and hectometer throughput capacity is achieved. Further more, the analysis of the optimal and suboptimal ship types combination and berths combination correspond to the fixed coastline and the optimal coastline length to the fixed ship types combination and berths combination is obtained.

同时，基于仿真模型，本文引入了船型组、泊位组、百米岸线通过能力及岸线利用率四个新的规划指标，拟合分析了到港船舶的待泊时间与靠泊时间比值Tw/Tb与百米岸线通过能力的函数关系，并进一步分析了在固定岸线长度下与其相适应的最优、次优的船型组合及泊位组合，确定船型组合、泊位组合情况下的最优岸线长度。

By using curve fitting, the function between Tw/Tb and hectometer throughput capacity is achieved. Further more, the analysis of the optimal and suboptimal ship types combination and berths combination correspond to the fixed coastline and the optimal coastline length to the fixed ship types combination and berths combination is obtained.

同时，基于仿真模型，本文引入了船型组、泊位组、百米岸线通过能力及岸线利用率四个新的规划指标，拟合分析了到港船舶的待泊时间与靠泊时间比值Tw/Tb与百米岸线通过能力的函数关系，并进一步分析了在固定岸线长度下与其相适应的最优、次优的船型组合及泊位组合，确定船型组合、泊位组合情况下的最优岸线长度。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我