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They consist of a coplanar wave-guide transmission line periodically loaded with 8 - 32 metal bridges, functioning as capacitive switches. Every switching element consists of a thin metallic membrane actuated by applied bias. Remarkable phase shifter performances were observed. 2 lAl0.96 Si0. 04 bridges MEMS Phase shifter reached to 372/3. 5mm under 20V bias at 35 GHz, the with an insertion loss (S21 of about 4 -7 dB...
该文介绍毫米波MEMS相移器的设计,研究低损耗衬底,Au,AlxSi1-x可动膜对下拉电压和传输损耗的影响,测试表明:21桥相位连续可调的分布式压控开关阵列一毫米波相移器在35GHz时,启动电压5V,20V时相移量达到372°/3.5 mm,并能在不同的控制电压下根据要求改变相移量。
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Based on Three Gorges Project, the following aspects about the three typical embedding manners are studied:(1) The border condition of cyclic symmetry is applied to the finite element models with contact among cushion layer, penstock and concrete. The effects of elastic modulus, thickness and placement extent of cushion layer on the stress of its around concrete are analyzed. It is suggested that the ratio of thickness to elastic modulus can be used as an important parameter in the design of cushion layer.
因此,本文结合三峡工程建设实践,在收集和总结前人经验的基础上,以大型通用有限元分析软件ANSYS为平台,对不同埋设方式的巨型蜗壳结构进行以下几个方面的研究:(1)引入循环对称边界条件,考虑垫层-钢板-混凝土之间的接触摩擦,建立有限元模型;并对垫层敷设范围、垫层厚度和弹性模量等设计关键参数进行了优化,并把"垫层弹性模量与垫层厚度之比"作为参考指标进行设计。
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To investigate the dispersive character of cylindrical Rayleigh wave, a finite element model is developed to simulate laser inducing cylindrical Rayleigh waves on the surface of an isotropic cylinder.
为了研究柱面上激光激发的瑞利波的色散特性,建立了激光在各向同性圆柱表面激发瑞利波的有限元模型。
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Love, the strongest and deepest element in all life, the harbinger of hope, of joy, of ecstasy; love, the defier of all laws, of all conventions; love, the freest, the most powerful moulder of human destiny; how can such an all-compelling force be synonymous with that poor little State and Church-begotten weed, marriage?
爱,所有生活中最强烈最深刻的成份,希望的、欢喜的、着迷的先驱;爱,所有的法律、所有的传统的挑战者;爱,人类命运的最自由的、最有力量的模具,如此一个全能的力量怎么能与那可怜的政府和教堂所滋生的野草---婚姻能相提并论呢?
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Below reforming and opening and the new condition that expand socialist market economy, as a result of the changeover of new old system, the change of human relation, the objective existence of the element such as the readjust that all sorts of interests concern, desiccate ministry supervises working difficulty to increase, mix to some units, branch especially area party card " a party to an undertaking " supervisory job difficulty is greater and greater.
在改革开放和发展社会主义市场经济的新形势下,由于新旧体制的转换,人际关系的变化,各种利益关系的重新调整等因素的客观存在,使干部监督工作难度加大,尤其是对有些单位、部门和地区党政"一把手"的监督工作难度愈来愈大。
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In the initial design period of lunar exploration device, an accurate finite element modeling of lunar regolith is significant for the simulation and analysis.
在月球探测设备设计初期阶段,建立较为精确的月壤有限元模型,对于仿真和分析探测工具与月壤的相互作用情况至关重要。
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Based on the description of three-COMERO operational principle and the direction cosine of geometric element, a thought that uses direction cosine to analyze reasons of oversize geometric tolerance is advanced and relevant example is showed, which can expand the way of analyzing quality and direct to produce an eligible machine part.
在描述三坐标测量机工作原理和几何元素方向余弦的基础上,提出了利用方向余弦进行形位公差超差原因分析的总体思路,并辅以实例,拓宽了产品质量分析手段,有助于指导制造出合格的机械零部件。
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The purpose of this paper is to introduce an effective couple-stress continuum model to describe the performance of grid material when L \approx l_{m} and to recommend a method to calculate the effective moduli of the model. The representative volume element method Dirichlet boundary conditions is proposed.
在此基础上导出了正交各向异性偶应力介质的特征长度表达式和偶应力介质梁的抗弯刚度表达式,定义了偶应力影响因子\delta 以表征梁的偶应力效应。
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Product Instructions: Enhanced VMS series of optical image measuring instrument was an enhanced 2D optical image measuring instrument which bring out by our company. Using high-resolution color Sony CCD camera and the United States NAVITAR Zoom Lens and With our company's Manual version of self-developed measurement software MCINS .This tester have the basic measurement functions of point, line, circle, distance, angle etc .and multi-axis functions which are ableing to meet the basic needs of the secondary element measurement. In addition, measurement data can be input EXCEL, WORD, TXT or output the measurement graphics to the DXF document to make CAD designs.
增强型VMS系列光学影像测量仪,是我公司推出的一款增强型2D光学影像测量仪,采用高分辨率日本索尼彩色CCD摄像机和美国NAVITAR变焦物镜,采用我公司自主研发的MCINS手动版测量软件,具备基本的点、线、圆、距离、角度等基本测量功能及多坐标功能,能满足基本的二次元测量需求;此外测量数据可输入EXCEL、WORD、TXT中或者将测量图形输出至DXF文档做CAD设计。
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The beamforming is an important measure of the orientation estimation in theunderwater sound positioning. The Generalized Correlation Beamformer isstudied and the algorithms of FIM and WFIM(WeightedFourier Integral Method) are given. In most circumstances, the performance of these two algorithms is better than Delay-Sum Beamformer. The MVDR(MinimumVariance Distortionless Response) adaptive beamformers are investigated in element andbeam domain. The research results show that the beam-domain MVDR algorithm notonly increases the resolution, but also saves computer when using it to aim orientationestimation.
4水下声定位中波束形成技术是方位估计的重要手段,重点研究了广义相关波束形成算法傅氏积分方法(FIM和加权傅氏积分方法,大多情况下FIM、WFIM算法的性能优于时延—求和波束形成;研究了阵元域和波束域MVDR自适应波束形成,结果表明,利用波束域MVDR进行目标方位估计,既可以获得高精度的方位估计,又可以大大减少计算量。
- 推荐网络例句
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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.
然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。
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Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.
镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。
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A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.
付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。