地动

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

The measuring systems are successfully used in the electromagnetic pulse measurement generated by impulse voltage discharge and switch operation in 500kV substations. Full waveforms of transient electric field, transient magnetic field, transient voltage of high frequency relay channels and low voltage alternative current power during switch operation period have been obtained, and the fast transient pulses in high frequency relay channels and AC power have been caught.

将该套测量系统成功地应用于500kV变电站开关操作产生的电磁脉冲的研究中，得到了开关刀闸操作时暂态电场、磁场、高频通道、交流电压等的完整波形，发现低压交直流电源系统和高频保护通道中存在非常严重的脉冲群干扰，初步解释了变电站二次电源模块经常损坏和高频保护经常误动的原因，提出了加强保护和研究的建议，进一步验证了测量系统的先进性。

While West Lake's most popular dish is goat with rice pasta, there are some which call for a strong stomach, such as the dish featuring slithering slices of fresh-killed snake and a deep-fried seafood delicacy which, when prepared correctly, arrives at the table with the head of an expiring fish still gasping for breath.

西湖楼最有名的一道菜是「粉皮羊肉」，其他有些菜色则要胆子够大才能尝试，例如有一道菜是把现杀的蛇切成一段一段，身体都还在动；另外一道鲜鱼活吃，则是必须精准掌握准备与炸的时间，送上桌时鱼嘴必须一张一合地喘息著才算合格。

A comprehensive review and expectation about researching status in quo and development trends of viscous flow numerical simulation technique are given in this paper and grids generation methods, numerical computation methods, turbulent model and moving boundary simulation methods are the emphasis study in the paper. On the basic of above job a mathematical model of simulation turbulent flow with free surface is established and triumphantly applied to numerical computation on 2D spillway and 3D spillway with frusta of brake.

本文针对粘流场数值模拟技术的研究现状和发展动态作了比较全面的回顾与展望，重点研究了网格生成技术、数值求解技术、湍流模型技术和动边界模拟技术，在此基础上建立了模拟自由面湍流场的数学模型，并成功地应用到二维溢流坝和带闸墩的三维溢流坝过坝水流的数值计算。

Technology companies means complete, set up a machining, welding steel structure, product finishing and painting, assembly and test production workshop and semi-finished products, finished the Treasury, a product testing ground and supporting a drilling rig market, with a metal processing machines, gas Protection welder, import 100 tons of Ramli, 16 tons of traffic, 35 tons gantry crane, balancing test machines, presses, cutting plate machine, in combination derrick tyres, paint rooms, equipment, tooling Shotblast derusting facilities.

公司工艺手段齐全，设置有机械加工、钢结构焊接、产品精整和烤漆、总装试验等生产车间和半成品、成品库房，有一个产品试验场和一个钻机配套场，配备了金属加工机床、气体保护焊机、进口100吨拉马、16 吨行车、35 吨龙门吊、动平衡试验机、压力机、剪板机、井架组合地胎、烤漆房、抛丸除锈设备等工装设施。

Today it is known for the "Tony Hawk" skateboarding games, the "Call of Duty" series of military shoot-'em-ups, and its "Guitar Hero" games, in which players must press buttons on a plastic, guitar-shaped controller in time with blaring rock music.

如今动视公司推出的很多游戏都是耳熟能详的，如&托尼·霍克&（又称&滑板天王&或&滑板高手&）、&使命召唤&系列还有&吉他英雄&（玩家必须伴嘈杂的摇滚乐及时的地按下塑料吉他造型的控制器）。

Or, rather, it employs two ring-shaped half-pipes that rotate with respect to one another (the lower one remaining fixed while the upper one revolves along with the building). The joints between the half-pipes have rubber seals to stop the contents leaking, and each half-pipe has a vertical pipe connected to it, to introduce or dispose of the fluid concerned.

或者更确切地说，它由两个相对旋转、各只有一半的环形钢管组成（在下面的半个环形钢管固定不动，而在其上的另半个环形钢管则跟着房子一起旋转），两者的接合处由橡胶材料封住以防管内物外漏，此外两个环形钢管各有另一根管道垂直接入，来引入或导出相关的流体物质。

He shifted back on his haunches doubtfully and stared at the exhausted human with surprise.

他带着怀疑，屁股向后动了一下，惊讶地盯着耗尽力气的人类。

On one occasion a group of local hecklers from the gas company tried to convince an audience that the " mad wizard from New Jersey was about to blow up the whole village," Garrison readily turned the tables and made them the laughing stock.

一次，一群从煤气公司来的当地捣乱分子企图煸动观众相信&从新泽西来的发疯的巫师要炸毁整个村镇，&加里森敏捷地扭转了局面并使这帮人成为笑柄。

Generate considerable thrust. The catapult officer releases the pistons, the force causes the holdbacks to release, and theforward.

弹射指挥员释放活塞后，巨大的拉力将牵引释放杆拉断，巨大的蒸汽压力猛烈地撞击着滑块拖动着飞机向前冲去。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。