使变大

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。

At this moment,that the change of neutral plane position plays a main role in the course of interface bonding,the grain refinement degree heightens whenεincreases. When e is higher than 4.8,the copper with big grains is made up of two kinds of structure regions in the course of deforming,namely fine sub-grains region and high density dislocation region.

此时，异步叠轧中性面位置的改变对界面的复合起到主要作用，变形等效应变的增大使晶粒细化程度变大；变形等效应变ε≥4.8时，粗晶铜在变形过程中有两种组织区域组成，分别为细小亚晶区和高密度位错区。

The cave might never have been discovered had not the entrance been spotted by the distinguished French pot-holer, Berger.

英尺。这个深邃的洞穴是由一条地下暗泉冲刷岩石中的缝隙并使之慢慢变大而形成的。

The results show that the diffraction spot of a spectrally dispersed beam becomes larger and its near-field uniformity is improved,while there exists area where the intensity is nearly even within the far-field spot.

模拟结果表明，光谱色散会使光束衍射光斑变大，近场空间强度均匀性改善，而远场光斑内部存在光强接近于均匀分布的区域。

With more isthe piston - spring type energy storer, this energy storer is locatedbetween the solenoid valve and the dump pump, comes by the wheelcylinder 液压油 to enter the energy storer, then the compressionspring causes the energy storer hydraulic pressure cavity volume tochange in a big way, to temporarily stores up the brake fluid.

用得较多的为活塞-弹簧式储能器，该储能器位于电磁阀与回油泵之间，由轮缸来的液压油进入储能器，进而压缩弹簧使储能器液压腔容积变大，以暂时储存制动液。

Results ZYC could increase the thickness of granular cell layer and decrease the thickness of theca cell layer, greatly decrease the level of T and LH in serum and the expression of TNF-α in rat ovary.

结果 助孕胶囊可使PCO大鼠的颗粒细胞层增厚，卵泡膜细胞层变薄，血清T、LH水平均明显下降，并下调卵巢组织肿瘤坏死因子α的表达。

She had been Zeus' unwitting helper as he carried out his plan of revenge and proved his power once again.

宙斯再一次使他的力量和权力变大了。

In the most important, the rotary voice coil and the raster rule tie better in and get more effective travel of raster rule.

最重要的是旋转式的音圈电机能很好的与高分辨率的直线光栅尺配合使用，使光栅尺的有效行程变大。

Fruit cordate, ovoid, or subglobose; valves flattened, sometimes slightly inflated, carinate, glabrous or sparsely pubescent when young

心形，卵球形的果，或近球形；裂爿使变平，有时稍膨大，具龙骨状隆起，幼时的无毛或疏生短柔毛 1 C。

For society and mankind but durative development, our country is in " 15 " during plan to throw 270 billion RMB to control water pollution, among them one important is river, river, laky processing, and the agent killing alga that its processing technique is a tradition more again, heavy alga agent, garrulous coagulates the method such as the dredge that agent and whole nation use generally, confirm through practice, afore-mentioned methods cannot administer the pollution of river, lake effectively not only, and often accentuate or transfer water pollution 2 times.

为了社会和人类的可持续性发展，我国在&十五&期间拟投入2700亿人民币控制水污染，其中重要的一项就是江、河、湖泊的治理，而其处理方法又多为传统的杀藻剂、沉藻剂、絮凝(使液体中悬浮微粒集聚变大或形成絮团，从而加快粒子聚沉，达到固-液分离的过程)剂及全国普遍采用的疏浚等方法，经过实践证实，上述方法不仅不能有效地治理河、湖的污染，而且往往加重或二次转移水污染。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。