查询词典 three-body problem

Considering multi-constraints in applications, an optimizing stowage model is set up, and a genetic algorithm for the three dimension packing problem is presented in this paper.

以军用集装箱装载为研究对象，在考虑实际应用中的一些约束条件下，构造了军用物资的装载优化模型，提出了一种军用集装箱三维装载的遗传算法。

This multi-faceted problem is explored in detail to provide a research framework basing mainly on the literature review, and also the author's observations and experiences as a design student, teaching assistant and studio instructor; and elucidated further in the following three chapters as the foundation of the research

这种多层面的问题是详细探讨提供一个研究框架为基础主要文献，也是作者的意见和经验作为设计的学生，教学助理和工作室导师；和阐述进一步在以下三个章节的基础研究

According to the above problem, this research firstly divides the petroleum development system into three subsystems according to the structure of oilfield output, and then sets up the state transfer equations of oilfield development system by embedding the function simulations and the transfer rule between the total output and the subentry outputs.

本文从整体优化的角度出发，将整个油气开发系统按其产量构成划分为若干个子系统，在研究总产量与其分项产量之间递变规律的基础上，结合功能模拟建立了油田产量开发系统的状态转移方程，并在此基础上利用目标规划建立了油田五年规划模型。

He's only three,but he can already do simple problem in addition and subtraction.

他只有3岁，但他已能做简单的加减法题目了。

The problem is that this is three books trying to be one and not always succeeding.

本书的问题是，他把三本不同的书捏合为一本，但却不那么成功。

Although the theories for plane deformation of thick-walled tube are abundant, there is few model based on the spatial formulation which is an intrinsic feature of swage autofrettage. After a review on the Davidson's experiment and his theory, as well as recent researches in China, We has solved the problem in three steps

第一章综述了塑性力学中厚壁筒平面问题的模型和六十年代初Davidson用于指导他的机械自紧实验研究的准平面模型，以及国内近年来已开始研究的将平面解答延拓到机械自紧问题中去的切块法。

To sum up,there are three main ways of tackling the problem.

概括起来说，这一问题主要有三种解决办法。

A new scheme of target discrimination in SAR images, consisted of frames, models and algorithms, is proposed. Under such a scheme, a global frame, combining orderly the algorithm based on feature extraction and that based on knowledge, is then proposed. Moreover, in the method of target discrimination based on feature extraction, a "loose-coupling" model is given. The existing features are chosen and three new features about the contrast are given under the "loose-coupling". Meanwhile, an algorithm of feature selection based on Genetic Algorithm is also modified to solve the problem that the existing algorithm can not evaluate the goodness-of-features comprehensively. The weighted quadratic distance discriminator is designed to improve the performance of target discrimination. Finally, a method based on the knowledge of target groups to remove clutter false alarms is also given.

提出了一种目标鉴别的新方案，该方案包括目标鉴别的框架、模型以及算法；提出了基于特征选取鉴别和基于编队提取鉴别"序贯"连接相结合的目标鉴别框架；在基于特征选取进行目标鉴别的方法中，提出了目标鉴别的"松耦合"模型；提出了"松耦合"模型下目标鉴别的特征提取方法，包括已有特征的筛选和3个新的对比度特征的提出；改进了一种基于GA的特征选择方法，克服了已有方法对特征优劣评价不全面的问题；设计了加权二次距离鉴别器，提高了鉴别的性能；研究了基于目标编队知识进行进一步杂波虚警剔除的方法。

I:How long have you been here?A:About three months.I:Have you worked as a telephonist?A:No,but I think I can learn quickly.I:Well,your English is very good.I have noticed that.But the problem is my

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The initial-boundary value problem of dispersive equation is a kind of mathematical model, in this paper, it has been followed the ways of other scholars and used a new method and got a new difference scheme. It was a three layers ten-point implicit difference schemes.

色散方程的初边值问题是在孤立波这样的物理现象中抽象出来的一类数学模型，在前人构造的众多差分格式的基础上，使用新的构造方法，给出了该问题的三层十，点隐式差分格式。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。