挤压

The condition of numerical simulation on extrusion deformation is that the extrusion ratio is 4100, preheating temperature of billet is 300450 ℃ and extrusion ram speed is 220 mm/s.

模拟采用的挤压变形条件为：挤压比4~100，锭坯预热温度300~450 ℃，挤压杆速度2~20 mm/s。

The main research contents and results are given as follows:(1) Principles and characteristics of different types of polarization controllers are analyzed, the compare of the difference of these polarization controllers are discussed based on them, drawn a conclusion that the polarization controller which based on squeezing fiber and has variable delay quantity are suitable for high speed optical communication system.(2) The reset principle of the typical four channel polarization controller which is based on squeezing fiber is analyzed, and the design of its concrete reset scheme is given based on them. The reset process and the corresponding operation list are given in detail.(3) The systematical experiment is made when the typical four channel polarization controller is put into the PMD compensator. The experiment result showed that the channel which needs reset can efficiently return to the mean place, and the effect of reset was good, it didn't cause any badness infection on PMD compensation.(4) A new type optical signal time-domain depolarizer is given, and a new PMD compensate method is given based on it.

由此得出延迟量可变型光纤挤压型偏振控制器适用于高速光通信系统的结论；(2)具体分析了典型的四通道光纤挤压型偏振控制器的复位原理，并在此基础上对其进行了具体复位方案的设计，给出了各种情况下的详细复位流程和相应的复位操作列表；(3)将四通道光纤挤压型偏振控制器应用于偏振模色散补偿器中进行系统实验，实验结果表明，需要复位的通道能有效地回到中间值，复位效果良好，且复位未对PMD补偿产生不良影响；(4)设计了一种新型的光信号时域退偏器，并基于该退偏器提出了一种新型的偏振模色散补偿方法。

The company has vertical semi-continuous casting production lines, capable of producing all kinds of diameter of the circle and a square with deep processing of high-quality magnesium alloy billets deformation; extrusion production line can produce all types of magnesium alloy extrusion sacrificial anode, the sacrificial anode aluminum, zinc alloy sacrifice Anode and a variety of magnesium alloy extrusion products.

公司拥有立式半连续铸造生产线，能够生产各种直径的圆形和方形高品质深加工用变形镁合金坯料；挤压生产线可生产各类挤压镁合金牺牲阳极、铝合金牺牲阳极、锌合金牺牲阳极和各种镁合金挤压产品。

The expansion index of product, the productivity and power consumption of the extruder were measured.

通过挤压机螺杆与螺套之间的间隙、螺杆转速和物料含水率的变化，对产品的膨化指数，挤压机的生产率和功耗进行测定，分析在不同工况下挤压的工作情况以及产品特性。

In order to get the stress analytic solution, the stress equations are deduced with conformal mapping method and residue theorem, the defaults of equations in the reference are corrected. This method overthrows the obstacle in the engineering stress calculation for the flat receptacle with conformal mapping.

为了建立有实际意义的扁挤压筒应力解析解，本文结合单连体复变函数保角映射法和留数定理推导出受内压力作用的扁挤压筒的应力求解公式，更正了国外文献中相应公式的错误，开发了受内压扁挤压筒的应力计算程序，实现了应力计算的程序化。

At first step, the processor before the deformable body contact the end face of cone die cavity regarded as an extrusion process. The minification of core boss's cross-section regarded as compressibility of direct extrusion, which acted as definition factor when construct the Direct Extrusion Model element. Another step, the model element of flat punch extrusion on wedge piece process was constructed when propose the process of deformable body overflow die corner. In this way the spherical end face of blank looked as cone end face one, t he approximate treatment is one of originality innovation in this paper. At last, the two elements have been connected and constructed the model element of cone boss part's deformation in the open die forging.

对于锥形凸台成形的第一个特征时段，即坯料和锥形凸台型腔的端面接触之前的变形过程，本文将凸台的截面缩小率转换成挤压成形的压缩率并以此为界定，建立了不同截面缩小率时的锥形模正挤压的模型单元；对于锥形凸台成形的第二特征时段即锥形模的角部充满过程，在详细考察锥形型腔端面对变形过程影响的基础上，将变形体的球形端面近似成锥面建立了平冲头挤压楔形体的模型单元；最后将前述两种模型单元有机连结，构建了开式模锻中整个锥形凸台成形过程的定量描述。

Based on these results and other data, we try to interpret the geodynamical features of the Tianshan orogen.

根据计算结果，对新疆天山地区的构造动力学特征进行了分析和推断，认为天山处于地幔对流形成的挤压沉降环境中，在南北不对称的挤压应力作用下快速隆升，挤压应力场中心在天山以南。

In compressional area, physical modelling has been proved to be a powerful tool for simulating the evolution process of fold-thrust system, and gets great progress in nappe and double thrust structures, thrust belt inversion and basement involvement, compressional orogenesis function and surface process, structure transform zone in compressional area and mantle convection together with collision or subduction of plates etc.

在挤压地区，构造物理模拟已经被证明是一种模拟逆冲褶皱系统演化过程的强有力工具；在推覆体或双冲构造、冲断带的反转与基底卷入、挤压造山作用与表面过程、挤压地区构造转换带及地幔对流与板块碰撞俯冲等方面取得了很大进展。

The production technology of extruded caramel pigment was studied by the orthogonal tests.

利用正交试验对挤压法焦糖色素的生产工艺进行了研究，确定了挤压法焦糖色素生产的工艺参数，研究发现挤压法生产的焦糖色素是饮料生产优良的着色剂。

By combination of the finite differential technique with the upper bound elemental technique, simulation for the technology of extrusion directly following liquid infiltration which involves infiltration, solidification, and large plastic deformation in one process has been realized and the essences of various technical processes have been revealed by their corresponding simulation results showing the variation of the infiltrated depth and the temperature field with time during infiltration, the punch position, the solidification development of the matrix alloy, the state of the composite within the deforming zone, and the forming load required at different times during extrusion.

采用有限差分法和上限元法相结合，对融浸渗、凝固和大塑性变形为一体的液态浸渗后直接挤压工艺过程进行了数值模拟，从浸渗时浸渗深度与坯料温度场随时间的变化以及挤压过程不同时刻的冲头压下位置、坯料凝固情况、变形区坯料状态、成形载荷大小等方面揭示了不同工艺条件下的各种挤压过程的实质。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。