查询词典 optimum solution

The analytic solution of optimum low-thrust power transfer between arbitrary elliptical orbits using continuous constant acceleration is presented, based on the orbital elements selected.

研究航天器在小推力的作用下，椭圆轨道最优转移的一种解析解法。

By analyzing principle, the investigating project was primarily determined. Then experiments of leaching with hot water, precipitation arsenic by lime milk, solution arsenic by sulfuric acid, reduction, cooling and crystalling white arsenic have been carried out and the optimum conditions of every step have been obtained.

在分析基本原理的基础上，初步确定了研究方案，按照方案分别进行了热水浸出、石灰乳沉砷、硫酸溶砷、还原、冷却结晶白砷等试验，得到了各个工序的最佳工艺条件。

By a-priori choice of the regularization parameter respectively, the optimum asymptotic convergence order of the regularized solution is obtained.

给出了正则参数的先验选取，并通过正则参数的先验选取证明了正则解的误差具有渐进最优阶。

PSO is a population-based optimization algorithm, which mimics the social behavior of animals in a flock. It makes use of individual and group memory to update each particle position allowing global and local search optimization. The objective function considered was the total weight of the structure subjected to stresses, displacements and forces constraints. The effects of the parameters were investigated as well and such combination of tuning parameters promote a better global search behavior avoiding premature convergence while rapidly converging to the optimal solution. Results showed the effectiveness of the proposed method by comparing with ANSYS Design Optimization Tool (zero-order method). The PSO with the tuning parameters makes it an ideal method for offshore wind turbines foundations optimization tasks.(2) A reliability analysis method for pile foundation bearing axial loads based PSOThe performance function of pile foundation's axially bearing capacity sometimes is nonlinear and complex, on the basis of geometric meaning of structural reliability index, an optimum model with PSO for structural reliability analysis under arbitrary random variables was established, The PSO algorithm is very efficient to solve global optimization problemsIts use in structural reliability field presents not only the advantage of its facility of implementation, but also the possibility to obtain the design point and the failure probability with a good accuracy. In addition, PSO is a zero order algorithm, for no derivative is necessary for its implementation.

本文的研究针对桩式海上风机基础结构的特点，在国内外有关研究成果的基础上对海上风机基础结构优化设计理论和可靠度方法一些相关问题进行了较为深入的研究，具体做了以下几个方面的工作：(1)基于粒子群优化的桩式海上风机基础确定性优化设计方法桩式海上风机基础的优化设计是一个复杂的、非线性约束的优化问题，针对传统的基于梯度信息的优化方法在处理非线性问题中易陷入局部最优解的问题，本文将一种耦合惩罚函数的PSO算法引入到海上风机基础结构概念设计中，PSO算法是从群体动物聚集觅食这一活动中受到启发而发展的，该算法利用个体和群体的信息共享不断改进自身的位置从而进行局部和全局最优搜索，本文中以桩和三脚架连接段直径及壁厚为设计变量，以基础总重量作为优化的目标函数，在给定的约束条件下建立了三脚架基础优化数学模型，另外本文还研究了PSO参数变化对结果的影响，协调的参数组合可以避免陷入早熟收敛而能够快速的获得全局的最优解，通过与ANSYS优化模块的计算结果比较验证了该方法的有效性，本方法为海上风机基础的确定性设计提供了一条有效的途径。

By means of image theory and potential superposition principle,this paper presents the analytic solution of water cresting height and lateral distance from wellbore under steady flow,and optimizes the optimum wellbore placement.

该文利用镜像反映和势的叠加原理，给出底水油藏水平井稳定渗流情况下不同时刻和临界条件下底水脊进高度和水脊面距井轴的侧向距离的解析解，同时结合矿场实例给出实际优化水平井最佳井筒位置，其结果和方法对底水油藏水平井油藏工程设计和理论研究具有一定的指导意义。

The governing equation of in-plane vibration of cable-restraint system is derived by means of D'Alembert principle, and then those partial differential equations are transformed into a set of ordinary differential equations by Garlerkin method. The method of Runge-Kutta integration is applied to solve the equation. The simulation analysis is made to prove that this vibration control has obvious damping effects and then the influence of cable tension, support mass, natural frequency and spring stiffness on the damping are discussed. Eventually, the approximate analytic solution of the optimum damping parameter is obtained to provide a simple and effective reference and design method for the engineers.

通过D'Alembert原理建立拉索－弹性约束系统振动方程，通过Galerkin方法将偏微分方程转化为常微分方程，应用龙格－库塔积分法求解方程；经过仿真分析，验证了该振动控制具有明显的减振效果，并且讨论了初始拉力、支座质量、振动频率及弹簧刚度对减振效果的影响；最后给出了计算最优阻尼参数的近似解析式，为工程师提供了简便有效的参考依据及设计方法。

It reaches the optimum time complexity for a CRC constraint network recognition algorithm, and hence provides a feasible solution to practical CRC constraint satisfaction problems.

CSP的一个解是指S中的每一个变量在其值域内取定一个值，使得各变量在当前的取值情况下满足所有给定

The studies also confirmed that aquatic animals had filtration for microalgae diets, and inorganic flocculants could effeciently flocculate microalgae in aqueous solution with the optimum pH.

研究还肯定了水生动物对微藻的滤食作用及絮凝剂在适当pH值下对微藻的快速絮凝沉降效率。

The results show that the optimum technology is as follows: hemachrome, sodium nitrite and vitamin C should be mixed in hemoglobin solution as the mol ratio of 1∶3∶12, heating temperature is 85℃, and holding time is 15min. The chromogenic rate of the nitrosohemoglobin prepared under this condition is 90.42%.

结果表明，其最佳制备工艺为：血红蛋白溶液中所含血红素∶亚硝酸钠∶维生素C的摩尔比为1∶3∶12，加热温度为85℃，保温时间为15 min，所得半干固体亚硝基血红蛋白的发色率为90.42%。

Work required for choosing a proper initial solution ,has been used for the optimum structural design of mid2

此外，GA 不依赖于初始解，所以大大减少了选取一个合适的初始解的工作量。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。