壳体

Based on a series of signal process and noise source identification techniques, especially the major noise source identification methods, such as expurgation method, sound intensity analysis, spectrum analysis vibro-acoustic correlation analysis and so on, the pass-by noise control of SC7080A and SC6360B are studied in detail. By the roadway and dais experiments, the major noise and radiating parts are identified and some economical controlling methods are made. For the SC7080A, to control the emissing noise from the intake and shell vibration of air cleaner, a intake muffler is installed between the air cleaner and intake valve. Based on the theory of Helmholtz resonator, One three-parallel-connected resonant silencer is designed and trial-manufactured. For the SC6360B, the attenuation performance of exhaust muffler in high frequency region is improved. To reduce the vibration noise of shell part, the structure of oil sump tank, exhaust manifold shield and exhaust manifold shield are analyzed and improved. At the same time, some measures, such as sound absorption, sound insulation, are taken to reduce the noise of engine surface emissivity and a sound shield is designed.

本文首先综述了目前国内外汽车加速噪声控制的现状、主要方法和技术措施，在此基础上，结合SC7080A和SC6350B汽车的车外加速噪声水平及现状，综合运用分别运行法、声强法、频谱分析法、声振相干函数法等现代噪声源识别方法，对SC7080A和SC6360B汽车进行了准确详细的车外加速噪声源识别并提出了经济可行的控制方案，针对SC7080A，主要在空气滤清器和进气阀门之间的进气管道上加装进气消声器，抑制空气滤清器壳体表面和进气口两处的噪声辐射，根据Helmholtz共振腔原理设计了三腔并联旁支型共振消声器，并进行了工程化设计和试制；针对SC6360B，主要改善了排气消声器在高频段的消声性能，对罩壳类零件进行了结构改进，降低了其表面噪声的辐射，并对发动机舱进行了吸声、隔声处理，设计了发动机隔声罩。

Now we have known that SARS-CoV encoded 11 varietal proteins. They have 4 constitutive proteins: spike protein, membrane protein, envelope protein and nucleocapsid protein. Spike protein trimer form spike and exsertion? virus peplos on the surface. Spike protein is archi-surface antigen component of virus, it has acceptor binding and membrane fusion activity. Spike protein has important effect at tissue tropism, cell-fusion and toxicity. Nucleocapsid protein can bind genome RNA to shape neucleocapsid. Membrane protein and envelope protein are necessary constituent to shape virus peplos. Spike protein is I-type membrane glycoprotein, it mediate virus binding with host cell epimembranal acceptor and to fuse host cell membrane.

SARS-CoV属于巢状病毒目、冠状病毒科，为单正链RNA病毒，基因组全长约29.7kb，已知编码11种蛋白，其中包括4种结构蛋白，分别是刺突蛋白、包膜蛋白、小包膜蛋白和核蛋白或核壳体蛋白。S蛋白三聚体形成突起，伸出包膜表面。S蛋白是病毒的主要表面抗原成分，具有受体结合和膜融合活性，在组织嗜性、细胞融合和毒力等方面起重要作用。N蛋白与基因组RNA结合形成核衣壳。M蛋白和E蛋白是包膜形成所必需的成分。

With juggling externals shell and this steady single core I created various workspaces.

随着玩弄外部壳体和稳定的单核心我创建的各种工作。

When the gear face wear can be removed to end, while a further decomposition of grinder pump casing surface in order to guarantee space in the pump end of the range of requirements.

当齿轮端面磨损时，可把端面磨平，同时再研磨机油泵壳体分解面，以保证泵的端面间隙在要求的范围内。

According to the regulation in《universal technical requirements for eye and face protectors》and《equipment for eye and face protection during welding operations》in our Country, we took part in and finished the design of the shell and the circuit of the face guard.

根据国家《眼面护具通用技术条件》和《焊接眼面防护具》中规定的要求，参与完成了面罩壳体和控制电路的设计。

It is mainly composed of housing, excited winding, stator winding, fan and belt pulley.

主要由壳体、励磁绕组、定子绕组、风扇和皮带轮组成。

It could solve the problem that it was difficult to perform accurate analysis of stiffness and strength of a shell plastic part due to finite element simulations with many theoretical assumptions and boundary conditions.

解决了以往由于有限元模拟时存在的很多理论假设和边界条件而难以对壳体塑件的刚度及强度进行准确分析的问题。

The first one is that a general notch affecting function is put forward using curve fitted method, so that the notchs effect can be considered in debris simulation.

实验测量方面，设计了一批FAE缩比模型试件，采用新的动态电测实验方法，在爆炸洞里对爆炸壳体实施了动态大应变历史和临界断裂参数的测量。

The guide pulley installs on the free wheel work, the freewheeling in place spline aperture fixes after the guide pulley fixed drive pipe on the shell, worm gear through wheel hub colored key hole and driven wheel connection.

导轮装在自由轮机构上，自由轮内座花键孔径经导轮固定套管固定在壳体上，蜗轮通过轮毂的花键孔与从动轮连接。

As flameproof equipment are thicker shell and cover most of the material, while the provisions of relevant standards are met, you must be able to withstand internal explosion of the shell will not be damaged.

作为隔爆设备的壳体与盖大多都是较厚的材质，同时在满足相关标准规定之后，必须能够承受住在外壳内部的爆炸时不会被损坏。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了