查询词典 mechanical pencil

The mechanical behavior of Shape Memory Alloys material is tested, and the constitutive model of the SMA is established. A kind of SMA combined rubber isolator is developed, and the isolation effect of the SMA combined rubber isolator for long-span bridge and tall building structures is numerically simulated, from which the adaptive isolation performance and the self-restoring capacity of the SMA combined rubber isolator are verified. A kind of SMA damper is developed, the mechanical behavior of the SMA damper is tested, and the model of restoring force of the SMA damper is established. The theory and method of adaptive control based on the SMA damper for the long-span bridge are built, and the effectiveness and reliability of the adaptive control for the long-span bridge using the SMA damper are verified through numerical simulation and model test. The MRF-04K type magnetorheological damper is developed, the mechanical behavior of the MR damper is tested, and the model of restoring force of the MR damper is established. The theory and method of adaptive control based on the MR damper for the long-span bridge and tall building structures are built, and the effectiveness and reliability of the adaptive control for the long-span bridge and tall building structures using the MR damper are verified through numerical simulation and model test. In addition, the theory and method of sub-structural damage identification for long-span bridge are derived, the influence of soil-structure dynamic interaction on the seismic isolation and control effects with different isolation and control measures and the damage responses and the sliding base-isolation of large structures under the excitation of underground explosion are investigated.

试验研究了形状记忆合金材料的力学性能，建立了SMA材料的本构模型；研制了一种SMA复合橡胶隔震支座，数值仿真分析了应用SMA复合橡胶支座的大跨桥梁和高层建筑结构的隔震效果，从而验证了SMA复合橡胶支座的自适应隔震性能及其震后自恢复能力；研制了一种SMA阻尼器，试验研究了SMA阻尼器的力学性能，建立了SMA阻尼器的恢复力模型，建立了基于SMA阻尼器的大跨桥梁结构自适应控制理论与方法，通过数值仿真与模型试验验证了大跨桥梁结构SMA阻尼器自适应控制的有效性与可靠性；研制了一种MRF-04K型磁流变阻尼器，试验研究了MR阻尼器的力学性能，建立了MR阻尼器的恢复力模型，建立了基于MR阻尼器的大跨桥梁和高层建筑结构的自适应控制理论与方法，通过数值仿真和模型试验验证了大跨桥梁和高层建筑结构MR阻尼器自适应控制的有效性与可靠性；还建立了大跨桥梁结构的子结构损伤识别的理论与方法，研究了土-结构动力相互作用对不同隔震和控制措施的减震控制效果的影响以及地下爆炸波作用下各类大型结构的灾害响应与滑移隔震。

Software, and simulated by Monte Carlo method. The simulation results are conducted by descriptive statistics. Two "drop-in" assembly design lens groups were studied to calculate the stack-up element tilt and decenter within a cell and the resultant deviations of the optical axes away from the mechanical datum axis. The results indicate that the opto-mechanical tolerance model can analyze the critical to quality parameters of a lens system. As a result, the performance of the lens system can be anticipated by the opto-mechanical tolerance model before mass production.

戊n体编辑，并以蒙地卡罗方法模拟，模拟结果以叙述统计呈现；最后以两个"投入式"组立设计的镜群组为案例，计算镜片在镜筒内的累积偏心角度公差、偏心距离公差及镜片光学轴的累计偏移量，其结果显示该模型可模拟一个镜头系统的关键品质参数；所以，镜头系统的性能在大量生产之前可藉本光机公差模拟模型预测其品质与良率。

The errors analysis model is also selected, the equations of the mechanical errors analysis of the planar cam mechanical are derived by taking mechanical errors as stochastic variable.

本文对凸轮机构的各原始误差对从动件输出的影响作了系统分析，建立了凸轮机构误差对输出性能影响的通用分析力学模型。

Firstly, factors influencing on the mechanical behavior and mechanical properties simulated and predicted were separately taken as input and output quantities. Secondly, Four-layer neural networks model was established to simulate and predict the mechanical properties and constitutive relationship of syntactic foam plastics by means of back-propagation algorithm.

首先，选取影响材料力学行为的因素和所需模拟、预测的力学性能作为输入、输出量；然后，利用反向传播算法建立了四层神经网络模型，对复合泡沫塑料的力学性能和本构关系进行了模拟和预测。

More pathological ultramicroscopic changes are observed after 7-hour mechanical ventilation with pure oxygen, which reduces after mechanical ventilation with 34% oxygen. Oxygen concentration should be decreased while long-time mechanical ventilation is executed so as to reduce potential lung injury with oxygen toxicity.

纯氧通气7 h后观察到的肺超微结构损伤较多，吸入氧体积分数为0.34则相对较少，建议长时间气管插管通气时，宜降低吸入氧浓度，尽可能减少潜在的氧毒性肺损伤。

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Learn ST MURATA, TDK, CAXON, such as the company's electronic components, have a certain background of engineering work Education 2003/09 to 2006/07 studied at the School of Mechanical and Electronic Mianyang Vocational and Technical College In this profession, the main opening, and mechanical drawing, mechanical manufacturing base, PRO / E CAD CNC programming, and other courses

了解ST MURATA，TDK ，CAXON，等公司的电子元器件，有一定的工程工作背景教育背景 2003/09至2006/07就读于绵阳职业技术学院机械电子大专在本专业中，主要开设了，机械制图，机械制造基础，PRO/E CAD CNC编程，等课程

Software, and simulated by Monte Carlo method. The simulation results are conducted by descriptive statistics. Two "drop-in" assembly design lens groups were studied to calculate the stack-up element tilt and decenter within a cell and the resultant deviations of the optical axes away from the mechanical datum axis. The results indicate that the opto-mechanical tolerance model can analyze the critical to quality parameters of a lens system. As a result, the performance of the lens system can be anticipated by the opto-mechanical tolerance model before mass production.

戊n体编辑，并以蒙地卡罗方法模拟，模拟结果以叙述统计呈现；最后以两个&投入式&组立设计的镜群组为案例，计算镜片在镜筒内的累积偏心角度公差、偏心距离公差及镜片光学轴的累计偏移量，其结果显示该模型可模拟一个镜头系统的关键品质参数；所以，镜头系统的性能在大量生产之前可藉本光机公差模拟模型预测其品质与良率。

For obtaining the numeral solutions of round elastic plates in axisymmetrical deformation with varying-thickness in nonlinear deformation in the unsteady electromagnetic field and mechanical field,by establishing the equations of motion,the equations of distortion,the equations of Lorentz force,the equations of electronic dynamic mechenical,and adopting iterative method,we gained the nonlinear magneto-elastic calculation method and outcome of current-carrying shell,and gained the influencing degree toward mechanical parameter of varying thickness round ferreous plates in the electromagnetic field and mechanical field.

为了获得内边界固定的环形导电薄板在均布力与横向磁场作用下的变形问题的数值解，通过建立运动方程、变形方程、电动力学方程和洛仑兹力方程，运用迭代法得出了载流板壳的非线性磁弹性的计算方法和结果，以及机械场、电磁场对铁质变厚度圆板各力学参量的影响程度。

The law how these factors influence the joint"s property was pointed out. A formula about the relationship between extrusion times and contamination remainder was founded. Main reason to bimetal"s inharmonic deformation was the difference of their mechanical property. Thereby, the empirical formula showing the relation between metal combination"s mechanical property and quality of joint was constructed. Integrated influence of extrusion times and metal"s mechanical property to quality of cold pressure welding joint was discussed.

在模拟结果分析和实验的基础上，对影响异种金属冷压焊焊接性的工艺因素进行了分析；探讨了诸因素对接头性能的影响规律，并且建立了挤压次数与界面污染物残留量之间的数学表达式；指出了两种材料力学性能差异是造成不协调塑性变形的主要原因，并且建立了材料力学性能与其冷压焊焊接性之间的经验公式；定性的讨论了挤压次数及材料力学性能对冷压焊接头性能的综合影响。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？