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After studying the curve of the vibration frequencies, which are varying with the changing of the structural parameters such as the rigidity of pier, the rigidity of straining beam, the rigidity of truss, the high of pier, the width of deck, and so on, some rules about the changing of vibration frequencies and the influencing of the structure that vary with the parameters were achieved.

研究了桥墩刚度、横系梁刚度、桁架片刚度、桥墩高度、桥面宽度等参数对结构动力特性的影响，通过对结构的自振振型及频率进行相应分析，得出结构参数变化对结构的横向刚度、竖向刚度、纵向刚度和扭转刚度及其他动力特性的影响程度及规律。

The results shows that die pressure of extruder, relaxation time of polymer and geometrical parameters of die have significant effect on stress tensor in extruder die. By changing the geometrical parameters in the flowing channel, the pressure can be controlled.

模拟结果表明：机头压力、材料的松弛时间以及口模流道的几何尺寸对高聚物在机头中的应力张量的变化影响较大；通过改变挤出流道的几何尺寸，完全可以控制高聚物的熔体压力。

The relationship between the load measured by strain method and the load calculated according to flight parameters and the wind tunnel test data has been investigated in this thesis .The result showed that the calculation load based on the flight parameters and wind tunnel test data is acceptable in subsonic speed and gets good agreement, with the load measured by strain method.

本文研究了采用应变法实测载荷和根据飞行实测参数和风洞实验数据计算载荷之间的关系，研究表明采用飞行实测参数和风洞实验的数据计算载荷在亚音速范围内是可行的，与采用应变法实测载荷是吻合的。

By comparison between the parameters before and after the test, the development regulation of physico-mechanical parameters of the substratum of pit is found.

结合深基坑的突水问题进行室内模型试验研究，通过对比试验前、后的参数，发现突水前后基底土体物理力学性质的变化规律。

A mathematical model including the suspension and tire parameters is developed for analyzing the automotive interior noises caused by road irregularity excitation in this paper.The interi-or noises at driver's ear position are calculated by means of admittance functions at suspension mounting points,noise transfer functions from suspension mounting points to driver's ear and suspen-sion and tire parameters.

本文建立了因路面不平度随机激励所产生的车内噪声的数学模型，借助于测得的车身悬置连接点的导纳函数、各连接点到车内耳旁位置的噪声传递函数以及悬置和轮胎参数，计算了由路面不平度所引起的车内耳旁噪声的大小。

Firstly, the detailed analysis and calculate of the dynamics parameters as suspensory point load, pure toque of speed reducer shaft etc and kinematics parameters of conventional beam-pumping unit and eccentric placed pumping unit which are in services in oil field have been made combining the basic theory of present beam-pumping unit to provide theoretic foundation for the kinematics and dynamics simulation and optimizing design of pumping unit.

首先，结合现有游梁式抽油机工作原理，对油田在役的常规型游梁式抽油机和异相曲柄平衡游梁式抽油机的运动学和悬点载荷、减速箱曲柄轴静扭矩等动力学参数进行了详尽的分析计算，为游梁式抽油机的运动学和动力学仿真及其优化设计提供了理论依据。

Using the simulation calculation program and adopting the single factor analytic approach, simulation results are gotten and conclusions can be drawn from the simulation results. The parameters have a little influence on vibration of the driver's seat when the frequency of the vibratory force is larger than 20Hz, and the zone that the parameters have great influence on vibration of the driver's seat is nearby the sympathetic vibration frequency of the system which is about lOHz.

利用编制的模拟计算程序，采用单因素分析法，分析了各参数对驾驶员座椅处振动位移的影响：在激振力频率大于20Hz后，各参数对驾驶员座椅处振动影响较小；各参数对座椅振动影响较大的区域在激振力频率为10Hz附近的共振区。

Thirdly, we discussed how to decide whether the process is in control and if not, what shall we do to remove the signals. In this part, there are two aspects: T~2 statistic with unknown parameters and T~2 statistic with known parameters.

在此基础上，对如何通过历史数据建立稳态进行研究，其中的主要内容分为已知参数的情况下的异常值判异，未知参数情况下的异常值判异。

The results indicate that the tailrace tunnel has a good effect on air cooling and dehumidification in summer, and that the parameters of outlet air in the tailrace tunnel are mainly influenced by the temperature of tail water rather than by the parameters of outdoor air and the terminal air parame...

测试结果表明，夏季运行时无压尾水洞对引入空气有良好的降温除湿效果；在无压尾水洞足够长的条件下，尾水洞末端引风参数主要受尾水温度的影响，而受室外空气参数的影响很小，尾水洞出口空气接近对应尾水温度的饱和状态。

The influence laws of the unified strength theory parameters and strain softening characteristic parameters on the tunnel tangential stress are discussed.

研究结果表明，统一强度理论参数和软化特性参数对衬砌与围岩塑性区切向应力的影响显著。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。