查询词典 three-body problem

With the society Of city develobing ,the value of urban forestry become More and more affirmable and is taken care by every City in the world ,this paper excerpt the history of Urban forestry and the need of constructing urban forestry ,refer to concept ,category ang area of urban forestry ,introduce the condition of natural and environment,the situation of society and economy of nanning simply, summarize status of forestry resource in nanning, analyze and evaluate urban forestry in nanning about city afforestation ,timber structure,biodiversity ,comprehensive development of forestry ,and so on ,in according with investigation of Nanning citys afforestation in 2000,and suburban forest resource survey in 1999 ,and so on ,suggest the antidote of sustainable development according to the problem existing at present and develobment tendency of ecology ,second, bersist the orientation development of urban forest ,third,persist the principle of "the same three paces"and "the three unity",the last,change the affaire of managed department

随着城市社会经济的发展，城市林业的重要性越来越受到世界各城市的肯定并给予关注和重视。本文引述城市林业的历史以及建设城市林业的必要性，提出城市林业的概念、范畴及其地域范围，简要介绍南宁市城市自然环境条件与社会经济概况，依据2000年南宁市城市绿化普查及1999年南宁市郊区森林资源清查等资料，概述该市林业资源现状，并对南宁市城市林业的城市绿化、林种结构、生物多样性以及林业综合开发等进行分析评价，针对存在问题及城市林业未来的发展趋势提出南宁市城市林业可持续发展的对策：1加强生态文化宣传教育；2坚持城市林业的定位发展；3坚持"三同步"、"三统一"的方针原则；4转变经营部门职能，旨在为南宁市城市林业的建设和发展提供参考。关键词城市林业；城市概况；现状分析；可持续发展

So a new model of three-dimension neural network is proposed in this paper to deal with the problem of three-dimension assignment.

该文提出了一种三维神经网络模型，用以解决三节点情况下航迹关联的三维分配问题，并进行了实验仿真。

is applied to construct the three-dimension model for finite element analysis. Short circuit and open circuit of the field winding and the teeth and slots structure of the rotor are discussed. An appropriate three-dimensional mesh is made. The corner point problem of conductor is eliminated. Furthermore, a new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time.

在汽轮发电机失磁异步运行转子三维涡流场数值计算模型中，应用了〓法建立了三维有限元计算模型，考虑了转子绕组的开、短路状态及转子齿槽结构，形成了合适的三维剖分网格，解决了三维电磁场有限元计算中角点奇异的问题，创立了一种新的稀疏矩阵的存储格式以及基于该格式的预处理复数共轭梯度法从而减少内存开销和加快了求解速度。

Ion of the setting, the rest of the account is showing how, over the first three days, the problem of the earth's formlessness is solved as God shapes the creation, and how, over the next three days (and perhaps beginning on the third day, if you count the plants), the earth's emptiness is replaced by the various created things that God places in the newly shaped regions.

从这个场景的叙述，其余的记载显示，头三天中，地空虚的问题被解决了，上帝塑造了地﹔以及，在接下来的三天中（如果算植物，第三天大概也包括在内），混沌的地被各种被造物所填满，是上帝把它们安放在已经造好的区域里面。

In this paper,taking advantage of some properties of Gamma function,we get the explicit solution. Some simulation results are also given in this paper. In chapter three, we discuss the problem under censored data in three circumstances.

一直以来，对Weibull分布参数的矩估计都是采用数值方法求解，本文利用Gamma函数的一些性质，得到了估计的显式解，并从理论和数值模拟说明此种方法相比其它方法的优越性。

To finally solve the driftier problem of three Gorges Project together with the Gezhouba Project, thread of" dredging being the principal method" must be adopted in settling the drifter problem in the reservoir areas.

三峡枢纽库区漂污治理，应采取&以捞为主&的思路，以根本解决三峡及葛洲坝两大枢纽的漂污问题。

According to Goos's and Galbraith's model of problem solving (1996), only one interviewee had the features of all three stages. This student also demonstrated a better understanding of how to transfer newly gained knowledge to weather forecast exercises. The other four interviewees, who did not have the features of all stages, need teachers' facilitation to build their problem-solving skills in order to make optimal learning using the instructional simulation developed by this study.

根据Gooth and Galbraith（1996）的三阶段解题模式分析晤谈资料，发现只有一位受访者具备所有解题阶段的特徵，此位首访者亦展示如何将所学应用到新的学习情境，（Reno的及时天气预报），其他四位受访者则需要教师的协助，来发展解题技能，才可能受益於「气流过山与成云降水模拟」所设计的学习环境。

The dissertation firstly introduces the MDJ1600J high speed palletizer and then lists several main problems for it which includes optimization of palletizing pattern, multiline-to-uniline problem, analysis and synthesis for feeding system, high speed turning without impact, the problem of power rating of three-phase induction motors (S1) which work with many short processes and many short switched-off processes in a period, The working principle of high speed palletizing and performance analysis for high speed palletizer, and then these problems are analysed respectively and their solution methods are presented.

本文首先对MDJ1600H高速码垛机从整体上进行了介绍，由之引出了几个高速码垛的关键问题，这些问题包括：码垛模式的优化，多线合一问题，供料系统的分析与综合，高速无损转位问题，在包括启动的多短过程多短断能间隔的断续周期工作制下采用S1制三相感应电机的功率定额问题，高速码垛动作规划和性能分析，然后对这些问题分别进行了阐述，提出了各自具体的解决方法。

M-point boundary value problem; momotone iterative; equation system; impulsive differential-integro equation; three-point boundary value problem; positive solution; Fixed point; Cone

基础科学，数学，数学分析m点边值问题；单调迭代；方程组；脉冲微积分方程；三点边值问题；正解；不动点；锥

The first part analyse the academic base of setting up the supervisory board system, this part point out that setting up the supervisory board system show the value concept of protecting security in the Company Law of the People"s Republic of China;setting up the supervisory board system is the embodiment of separation of the three powers which is the in the Company Law of the People"s Republic ofChina;Designing and carrying out the supervisory board system is to solve the problem of entrusting and substitution; the effective running of the supervisory board system is the actual demand for the modem enterprises to solve the problem of powerof control.

首先以英美法系国家独立董事制度和大陆法系国家的监事会制度进行比较，以美、德、日、韩为蓝本，重点考察了大陆法系的监事会制度，介绍了这几个国家监事会制度独有的特色和特点，再在此基础上评述两大监督模式的优缺点，从而得出了公司内部的监督机制，依赖于本国的法律制度、经济背景和文化传统，无所谓谁优谁劣的结论，虽然两大法系的公司监督机制在互相借鉴，但并没有从根本上改变各自的公司权力构架，公司监控机制有效发挥取决于制度设计的合法性、合理性和可操作性。

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。