查询词典 gap theorem

Combining the experimental results and theoretical analysis, the following work has been accomplished.(1) Reasons of the decrease of interelectrode capacitance and the increase of discharge gap caused by the powder suspended in dielectric fluid are explained. And the mechanism that surface quality of workpiece improved by powder-mixed EDM is analyzed from this viewpoint.(2) The variation regularity of the percentage of silicon on the machined surface of workpiece has been summarized according to the experiment results when silicon powder was added into the working fluid. The entropy is introduced to explain the reasons for this variation regularity by thermodynamics.(3) The dimensional accuracy is greatly influenced by the overcut resulting from discharge gap and electrode wear in practice application. Empirical formulas for the overcut in EDM and powder-mixed EDM are established based on the experimental results using the ternary linear regressive method in this paper.(4) The influence of main factors on the machined surface characteristics has been evaluated based on the orthogonal experimental design method.

通过一系列普通电火花加工与混粉电火花加工的对比实验，运用工艺实验和理论分析相结合的方法，重点做了以下工作：(1)探讨了粉末颗粒导致极间电容减小、放电间隙增大的原因，并从这个角度解释了混粉电火花加工可以改善工件表面质量的机理；(2)以混合硅粉的电火花加工为例，实验得出峰值电流和脉冲宽度对加工表面层成分中硅元素含量的影响规律，并引入熵的概念从热力学的角度对硅元素含量变化的原因寻找了理论依据；(3)在实际加工中，由于粉末的加入使放电间隙变大，这使得混粉电火花加工的尺寸精度难以控制，本文利用三元线性回归的方法，在实验数据的基础上，建立了两种电火花加工过切量的计算公式；(4)将正交试验法应用于混粉电火花加工实验研究，并通过对实验指标极差的直观分析，得出各电参数对加工指标影响的敏感程度。

Based on 6-dimision forces and machining currents, intelligent on-line monitoring and controlling the interelectrode gap is realized on the dissertation. The relation among 6-dimision forces received by cathode, machining currents and interelectrode gap is investigated widely and deeply.

本课题从电解液作用在阴极上的六维力及加工电流信号两个全新的角度入手，以平面、斜面、叶片型面三种工件的电解加工为对象，进行了电解加工间隙在线检测及智能控制的研究，对六维力、加工电流与加工间隙之间的关系进行了广泛而深入的探索。

We first analyze the current situation of income gap and education in China, and point out that the interrelation between education and income gap.

首先分析我国的收入差距和教育的现状，并指出教育与收入差距的相互关系。

High-density material lying at the circumference of a proacrosomal vesicle was arched with a gap in Solen grandis, but round in Solen strictus. From this gap a proacrosomal vesicle of Solen grandis began to invaginate and deform while it moved to the nuclear front. However a proacrosomal vesicle of Solen strictus did not deform until it reached the nuclear front.

大竹蛏精细胞前顶体囊的高电子密度物质分布在周缘呈一个带缺口的弧形而不是圆形，而长竹蛏前顶体囊周缘的高电子密度物质呈一圆形分布；大竹蛏的前顶体囊是先内凹变形，然后一边变形一边移动，而长竹蛏的前顶体囊是在到达核前端后才开始变形。

Results of XRD,SEM,and UV-Vis indicated that ZnS nanocrystals can grow in and fill in the void of opal template,and SiO2 microspheres of templates are dissolved so as to form some three dimensional ordered porous structure and to form the inverse opal ZnS photonic crystals. Compared with opal templates,ZnS-opal and inverse opal ZnS photonic crystals assembled with SiO2 spheres in the same diameter show good optical properties and exhibited photonic band gap. The photonic band gap position of inverse opal ZnS moves towards UV area compared with opal and ZnS-opal.

结果表明：溶剂热法多次充填可使ZnS纳米晶在模板密堆积形成的空隙中均匀成核；经过酸处理的ZnS-opal中SiO2微球溶解、坍塌，形成蜂窝状三维有序介孔和反opal结构ZnS基光子晶体；相同粒径SiO2微球组装的opal模板、ZnS-opal以及反opal结构ZnS光子晶体均表现出光子带隙特性，但反opal结构ZnS光子晶体带隙位置相比前两者发生了蓝移。

The part analyzes profit and free-rent period through discussing probability of house in-and-out quantity in profit risk, proposes the risk management measures of cash supervisory mechanism and selectivity financing in capital gap risk, putts forward the measures of liquidity gap forecast, improving credit and adopting different free-rent period in house liquidity risk, and introduces the credit swap to transfer leaseholder default risk.

本部分主要分析了房屋置业中心的四个风险，分别是收益风险，通过引入给定时间段内的房屋存贷量的概率分布分析了房屋置业中心的收益风险和空租期的确定；资金缺口风险，并提出现金监理机制和选择性融资的风险预防措施；房屋流动风险，提出流动缺口预测、提升自身形象、采用不同空租期的风险管理措施；承租人的支付风险，主要引入了信用掉期合同来转移这种风险。

In fact, as a result of the division of long-term, bank bond market and bond market, the gap between Exchange gap.

事实上，由于长期分裂，长期的结果，银行间债券市场和债券市场，交易所之间的差距差距。

The outer edge of the B ring which forms the inner boundary of the Cassini division is maintained by a gravitational resonance with Mimas. Near the outer edge of the A ring are the Encke Gap (325 kilometers, or 202 miles wide) and the barely visible Keeler Gap (35 kilometers, or 22 miles wide).

形成卡西尼环缝内缘的B环外侧的形状由其与土卫一的引力共振保持。A环外侧是恩克缝（宽325公里，202英里）和勉强能看到的科勒缝（宽35公里，22英里）。

There have been many good results when M is minimal sub manifold. In the first section we will introduce the context and make a general description on the recent researches. In the second we will introduce the complexion of the development for this problem. In the fourth we\'ll discuss the second gap on special conditions using similar methods when the mean curvature is constant, and find the second gap.

关于极小子流形的间隙问题已经有了很多好的结果，第一节引言中我们将介绍本文的研究背景及这些主要结果，第二节中我们来介绍具有常平均曲率情形的间隙问题的发展现状，在第四节中我们用类似的方法讨论平均曲率为常数的紧致超曲面的第二间隙问题，得到了第二间隙δ=？

If you bend down, you can reduce this bending parts of teeth pad and nano-imprint lithography drum of gaps can be reduced by this bending parts of clishion and siowal paper teeth to feed of the top of the gap; if the multiplicable this bending parts of teeth pad and nano-imprint lithography drum of gaps could be increased by the curved parts of clishion and siowal paper teeth to feed the gap.

如果往下笔直，可裁减此笔直部位的递纸牙垫与压印滚筒的间隙，也可裁减此笔直部位递纸牙垫与给纸台的间隙；如果往上笔直，可补充此笔直部位的递纸牙垫与压印滚筒的间隙，也可补充此笔直部位递纸牙垫与给纸台的间隙。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。