参数变化

Secondly, the simulative software has been made using MATLAB to simulate the suspensory point load、 velocity、 acceleration and pure toque of speed reducer shaft of pumping unit on any place and the displacement、 velocity、 acceleration of main component of pumping unit and the forces of linked point of two components, so the changes of the motion and the force of pumping unit and the geometry parameters' influence on the main performances of pumping unit have been dynamic analyzed.

其次，利用MATLAB，编制了仿真软什，对抽油机在任意位置时的悬点载荷、速度、加速度和减速器输出轴抓矩以及抽油机主要构件的位移、速度、加速度利各构件连接点的受力等进行了仿真，从而动态地分析了抽油机的运动利受力变化及几何参数对抽油机主要性能的影响情况。

At the beginning the controllable techniques of the converter in the world are reviewed. Its operational principle and internal parameter relation are analyzed. The model of system in different coordinates is presented.

论文中首先回顾了三相变流器控制方式的发展及变化趋势，针对本文的研究对象分析了其工作原理和内部参数间的关系，给出了系统在不同坐标系下的数学模型，为系统的理论分析和实验奠定了基础。

Mathematic model of the refrigeration system is presented with applying the distributed parameters method. In the models of condenser and evaporator, the flow patterns and its effects on the heat transfer coefficients of refrigerant side are considered.

采用分布参数的方法建立了制冷系统的数学模型，在建立冷凝器和蒸发器两相区模型时采用了分相流模型，并考虑了流型变化对制冷剂流动换热过程的影响。

The balance regulation of the system us the digital PID control algorithm, using experiment to install PID parameter. Through the changed angle measured by angle sensor the stepper motor is controlled to make the teeterboard achieve balanceable state.

系统的平衡调节采用了数字PID控制算法，利用凑试法整定PID参数，通过角度传感器所测角度变化来控制步进电机的的转动实现跷跷板达到平衡状态。

This system adopts P89V51RD2 microcontroller as the core, the stepper motor as the drivers which is driven by L298 chip, the rudder to change the veer and the angle sensor to detect the transformation of the teeterboard. The infrared detection module is designed fore-and-aft the car.Via taking count of the pulse infrared photoelectric code board determine the location on the board. Infrared remote control keyboard boot the system into operation, and liquid crystal display information about relevant parameters.

本系统采用P89V51RD2单片机作为控制系统的核心，采用步进电机作为电动车驱动电机，以L298为驱动芯片，配以舵机改变转向，使用角度传感器检测跷跷板的角度变化，在车的前后端设计了红外黑线检测模块保证电动车顺利驶上板以及在板上笔直行驶，红外光电码盘通过脉冲计数确定电动车在板上的位置，红外遥控键盘启动系统开始运行，液晶显示相关参数信息。

The tensile and compression -strain curves, in the low temperatureconditions, are similar to the ones in the normal temperature.

通过对实验数据的分析，得出强度参数随温度的变化规律，以及温度对弹性模量、峰值应变的影响。

According to the characteristics of Guanting Reservoir as being long, narrow and shallow, and those of hydrologic、hydrodynamic and water quality diffusion, CE-QUAL-W2 model is used to stimulate the water quality transformation; and the water quality parameters of the model are tested and verified.

根据官厅水库狭长、水浅和水文、水力、水质扩散等特点，采用CE-QUAL-W2模型模拟其水质变化，并对模拟模型水质参数进行验证，将其用于官厅水库水质的预测研究；进而提出官厅水库水污染控制的对策及建议。

This characteristic of the stainless steel is determined by the variance of therm...

随辐照时闻的增加，温度的升高，其温度涨落的幅度基本保持不变，这一持性是由不锈钢的热学参数如热传导率、热扩散率随温度变化的规律所决定的。

However, it is difficult to measure thermally induced change in parameters of tissue.

组织特性参数是随着组织热损伤程度的不同而变化的，然而，受测量技术的限制，在有关热疗剂量的研究中，人们常常忽略组织对损伤或温度的动态依赖性，使得理论研究有欠准确，相应地，热疗在临床应用中不可避免地存在着一定的盲目性。

This article analyses the application conditions of freezing method, current research status and the problems in this field. It points that it's necessary to study deep freezing temperature field deeply and discusses the factors which influence the freezing wall such as soil's nature, moisture content, geological conditions, etc. It introduces the theory, process of freezing method, the distribution of temperature field of freezing method and key thermotics parameters influencing freezing temperature field. It simplifies the deep freezing temperature field model. Through ANSYS, this article founds the deep freezing temperature field model, and simulates the field on vary heat conductivities. It analyzes the results of ANSYS simulation, gains the theoretical value of thermometric holes which is needed by back-analysis. Using the simulation temperature and actual value, it gets the equivalent heat conductivity. Then it solves the deep freezing temperature field by the equivalent value, simulates the freezing wall development process and temperature change curve. Against the actual project, the results are favorable.

文中分析了冻结法施工的应用条件，目前对冻结法施工的研究现状和在此领域内存在的问题，指出了对深土冻结温度场进行深入研究分析的必要性；对影响冻结壁形成发展的因素如冻土土性、含水量、地质条件及施工方法等因素进行了论述；对冻结法施工的原理、过程，冻结法温度场的分布情况，影响冻结温度场分布的主要热学参数进行了综述；对深土冻土温度场模型进行了合理的简化，通过ANSYS大型有限元分析软件，建立了深土冻结温度场的模型，对不同导热系数情况下的深土冻结温度场进行了模拟；对ANSYS的模拟结果进行了定性的分析，通过对ANSYS结果的后处理取得了反分析时需要用到的测温孔理论温度值；经过对测温孔模拟温度值和实测温度值的分析，得到了冻结温度场的等效导热系数；使用等效导热系数对深土冻结温度场进行了求解，模拟了冻结壁发展情况和温度场中的温度变化曲线，用所得结果对比工程实际情况，取得了较好的效果。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。