基本特点

Surface tension effects on condensate retention angle and condensation heat transfer coefficient of carbon dioxide were studied.

综述了水平低翅片管外凝结传热的基本模型，阐述了二氧化碳制冷剂的物性特点，讨论了表面张力与凝液滞留角及二氧化碳管外凝结换热系数的关系，分析了翅片密度、环形翅片管尺寸对翅片效率、滞留角、凝结换热系数以及传热增强比的影响，优化了外翅片管的齿高与齿距，并求得相应的强化传热增强比。

Then the responding and flow disturbing characteristics of the valve are studied by means of both linearized analysis and numerical simulation. At last the performances are compared with the conventional ones and the influences of the clearance between spool and valve casing are also discussed.

第二章提出了利用阀芯的双运动自由度及毛细阻尼管沿程压力特性设计流体控制元件的基本思想，并叙述了按该思想设计的流体换向阀、流量控制阀及压力阀的工作原理和性能特点。

The first three chapters discuss the original rules and ideas, challenges and adaptive changes of the plan in practice, especially illustrated by related typical analysis; chapter four analyzes the general character of the cities which adopted city-manager plan, such as city size, area distribution, etc.; chapter five analyzes abandonment of city-manager plan, particularly its causation; chapter six discusses the professional management advocated by city -manager plan, and influence over other forms of local government.

目的在于阐明城市经理制这一市政体制的合理性和优越性。第一章论述城市经理制确立之初的基本原则和理念；第二章论述城市经理制在实践中所遇到的挑战；第三章论述城市经理制的一些适应性变化，并进行了相关的典型分析；第四章分析了采纳城市经理制的城市地区分布、城市规模等相关特点；第五章对放弃城市经理制的情况，尤其是对其原因进行了分析和阐述；第六章论述了城市经理制的专业化管理特色对其他地方政府体制的影响。

The fracture angle、height of roof coal and support chute which effect on the rules of caving coal are studied completely.

针对煤矿放顶煤工作面特点，建立了在有边界条件约束下的放出体多元数学模型，全面分析了顶煤垮落角、放煤高度、放煤口位置对放煤基本规律的影响，阐明放出椭球体轴偏角的产生与计算方法。

Combining the working environment of Electric locomotive and the characteristics of the in general Programmable Logic Controller, the system design will become the software for whole control logical function.

系统设计结合了电力机车的具体运行环境和通用PLC的特点，将整个组合逻辑固化成软件，来实现其基本控制功能。

It is described the research progresses of SSR markers in the purity of crop seed.

本文介绍了SSR分子标记技术的基本原理和特点，简要叙述了SSR标记技术在农作物种子纯度鉴定上的研究进展，并就其在杂交种纯度方面的应用潜力进行了探讨。

In this paper, ssr molecular marker technology, the basic principles and characteristics are summarized.it is described the research progresses of ssr markers in the purity of crop seed. and, it is discussed the potential applications in the purity of hybrid.

本文介绍了ssr分子标记技术的基本原理和特点，简要叙述了ssr标记技术在农作物种子纯度鉴定上的研究进展，并就其在杂交种纯度方面的应用潜力进行了探讨。

In this paper, ssr molecular marker technology, the basic principles and characteristics are summarized.it is described the research progresses of ssr markers in the purity of crop seed. and, it is discussed the potential applications in the purity of hybrid.

本文介绍了ssr分子标记技术的基本原理和特点，简要叙述了ssr标记技术在农作物种子纯度鉴定上的研究进展，并就其在杂交种纯度方面的应用潜力进行了探讨。365论文下载网_365txt小说阅读网Y$D y2{d

And then, proposes the process of agent-based online auction according to the characteristic of Agent and customer behavior model.

文章首先对Agent技术、网上拍卖的基本理论、网上拍卖交易业务流程进行了系统的分析，然后结合Agent的技术特点和顾客购买行为特性，给出了基于Agent的网上拍卖流程设计。

Elaborated the punching components formation principle, the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machining,the drawing and punching compound die with float punch-matrix,the drawing and cutting compound dies with unaltered press,the compound die for the back bowl of the noise keeper,the design of the compound die which could produce two workpieces in one punching,the bending die for the ring shape part ,the bending die which used the gemel ,automate loading die for cutting, the drawing,punching and burring compound dies with sliding automated loading,the punching die for the long pipe with two row of hole,the drawing die for the square box shape workpiece and the burring die for the box shape workpiece.

本文对冷冲压技术的分类、特点及发展方向作了简略概述；论述砬冲压零件的形成原理、基本模具结构与运动过程及其设计原理；对典型的冲压件模具进行了设计：大直径三通管冲压复合模设计盖世了肥直径三通管的加工难题、带有浮动凸凹模的拉伸冲孔复合模设计、适力压边式落料拉伸切边复合模设计、消音器后补碗落料、拉深、冲孔、翻边复合模设计、一模两件落料拉伸冲孔翻边复合模设计、环形弯曲件的模具设计、铰链卷圆成形工艺及模具设计、半自动送料切角装置设计、滑板式送料拉深、冲孔、翻边模设计实现自动送料、长管多孔冲模设计、带凸缘台阶方盒形零件拉深模与盒形件侧壁小孔翻孔模。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。