挤压

The research situation of the effect of different process route s on the microstructural evolution of materials in ECAP is summarized.

简要介绍了等径角挤压法的工艺特点和基本原理，概述了等径角挤压法的不同工艺路线影响材料显微组织演化的研究情况

Since the pressure comes mainly from southern, so the cross section of Corridor basin is dissymmetrical, it can be devided into southern fore—mountain uplift terrace, middle depressed plain and northern monocline plain.

由于挤压力主要来自南侧，因而走廊挤压断陷盆地在剖面上呈不对称状，由南向北还被进一步分为南部山前断褶丘陵台地、中央深凹陷平原和北部单斜平原。

The results show that structure curvature is negatively related to coalbed gas content,relative gas emission rate,outburst gas and coal amounts which reflect No15 coalbed of Ji is above the neutral plane of folds.That is,the No15 coalbed of Ji Group is compressed in incline and is tensed in anticline,and the higher structure curvature is,the higher stress is.

结果表明，构造曲率与瓦斯含量、瓦斯相对涌出量、突出瓦斯量、突出煤量呈负相关关系，反映研究区己15煤层位于褶皱中和面以上，即煤层在向斜轴部受挤压而背斜轴部受拉张，正曲率值反映煤层受到拉张应力作用，负曲率值反映煤层受到挤压应力作用，曲率绝对值越大，受力越大。

Double steel-ball extrusion deep hole solves the matching problem of steel-ball nucellus with workpiece axis, using this technology, extruding deep hole with smaudiameter is attained efficiently with high quality .

文摘：双珠式挤压深孔有效地解决了钢珠珠心与工件轴心重合的问题，高质高效地实现了较小直径深孔的挤压加工，实践证明，且能实现弯孔的高精加工。

First, a series of numerical analysis experiments are designed to investigate the effect of process variables on the damage factor, which constructs the learning samples for training the artificial neural network.

将基于数值模拟、人工神经网络和遗传算法的优化方法应用到镁合金的挤压工艺参数优化中，实现了镁合金挤压工艺设计过程中的参数优化问题。

The petrochemistry and geochemistry of Mesozoic volcanic rocks mainly indicate the environmental characteristic of distending structure which bears on orogenic belt. The process of the evolution that earth crust keeps thinning reflects that it is still in the time of extruding orogenesis. Only during the intermittence or relaxation stages of extruding orogenesis, the volcanic eruption of neutral rock and acidic rock were formed in the situation of relative distending structure.

中生代火山岩的岩石化学、地球化学特点，主要显示了与造山带有关的拉张构造环境特征，而地壳由薄变厚的演化过程，则反映了该时期仍以挤压造山作用为主，只是在挤压造山作用的间歇或松驰阶段，相对处于拉张构造环境的情况下，形成了中酸性岩的火山喷发。

But at low pressure, the continuum theory is no longer suitable and only the molecular dynamics method is passably valid. However, there have been yet a few studies on the squeeze film of micro-resonators in the free-molecule regime, and no 3D model of MD has been presented for SFD.

当气压很低时，气体连续介质模型不再适用，只能采用分子动力学方法但是，当前关于自由分子区域中的微谐振器件挤压膜阻尼的分子动力学研究非常少，为了避免计算量过大，还未有三维的挤压膜阻尼分子动力学模型。

The photoelasticity experiment was made to get the pressure distribution, and its results were loaded as the boundary conditions in finite element analysis to calculate the stress field of flat extrusion chamber.

针对扁挤压筒内应力的解析法求解非常困难，且很难有精确理论解的特点，用光弹性实验方法确定挤压力的作用方式，以此作为有限元计算的边界条件，对扁挤压筒内部应力场进行分析计算。

Adopting homogenous experimental design and applying the response surface method,the effects of corn variety,screw speed and water content on radial expansion ratio and extrusion index were studied,and the quadratic polynomial mathematical models of expansion ratio and extrusion index were constructed.

采用均匀试验设计方法，应用响应面分析了玉米品种、螺杆转速和物料水分含量对膨化率和挤压指数的影响，并建立了膨化率和挤压指数的二次多项式数学模型。

Compared with similar advanced equipment, FPP Series mill has advantages as follows,① Adding the cutting and grinding function;② Extend the time of material pressing and cutting and grinding;③ Solve the sensitivity of keeping the proportional spacing and proportional thickness;④ Widened material input size;⑤ Material output size are in a perpetual state;⑥ Multifunctional machine is used to dry and grind and filtrate material;⑦ Auxiliary equipment is less and covering is small and investment is small;⑧ Noise is low and dust is small, it is beneficial to protect environment and keep physical and mental health for operation workers.

FPP 型系列磨机的结构形式是电机拖动减速机带动磨盘旋转，带有压力的磨辊在磨盘上自转，对物料进行碾压，磨内的物料在旋转离心力的作用下均匀进入碾磨区，磨辊对物料实施挤压、剪切、研磨，故破碎能力大，粉磨能力强，与同类先进设备相比：①增加了剪切研磨功能；②延长了物料挤压剪切研磨时间；③解决了对物料粉层均匀一致，厚度一致的过于敏感性；④拓宽了对物料的进料粒度；⑤物料的出料粒度永远处于受控状态；⑥可以对物料进行烘干、粉磨、筛分一机多能化；⑦辅机设备少、占地小、投资省；⑧噪音小、扬尘点少，有利于环保和操作工人的身心健康。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。