As for certain material, we found that corresponding thickness and proper dimension of spot were necessary for accurately determining ultrasonic velocity. 发现用激光超声测定声速的时候,对于特定的材料,一定的厚度和合适的光斑大小对于减小实验误差是非常重要的。
The velocity index of the damper may result in different seismic-reduced effects, so it was necessary to confirm the proper range of the velocity index. 黏滞阻尼器的速度指数取值制约着阻尼支撑减震效果,需确定合理的速度指数取值范围。
The methods, results and conclusions about determination of proper traveling velocity of cable car by using this model are presented in this paper. 介绍应用该模型研究确定缆车运行速度要求的方法、果和结论。
Seismic inversion is the essential first-step to ensure the proper integration of seismic data, well-logs, velocity and geological information. 地震波阻抗反演是确保地震数据、井资料和地质信息正确综合的重要技术。
The theoretic investigation of I-V characteristics showed that, choosing suitable values of the area density of fixed negative charges and the doping concentration of p-AlGaAs, namely establishing with proper height, the recombination velocity on the interface would be decreased remarkably by eight orders approximately. 其I-V特性理论研究绐果表明,选择合适的负电荷面密度数和Al0.3Ga0.7As层的掺杂浓度,即:建立合适高度的感应势垒,可显著降低界面复合速度近8个数量级。
It has high range resolution and good anti-interference capability. Considering the influence of the Doppler effect on target motion, the paper provides a proper method for velocity compensation. 这种发射信号具有距离高分辨率和良好的抗干扰能力,但是目标运动的多普勒效应将使目标距离像产生徙动。
The proper adjustment of the ratio of reactants, the space velocity of reaction, the pulse voltage and repeated frequency of the plasma discharge can raise the yield of hydrogen peroxide. 适当调整反应物(氢气和氧气)的比率、反应的空速、放电的脉冲电压和重复频率能够提高过氧化氢的产率。
Through numeric value simulation of transition flue duct between outlet of the gas turbine and inlet of the boiler proper, the velocity distribution in outlet flue duct with upper surface plate of different elevation angle has been obtained. 通过对燃气轮机出口与锅炉本体进口之间过渡烟道的数值模拟,得出不同仰角上面板烟道出口的速度分布。
With the proper configuration of nine accelerometers and an appropriate definition of Strapdown Matrix, this scheme can obtain high accuracy of angular velocity with no need for high precision sensors to measure the angular velocity of the IMU. 结果表明,合理安装9个加速度计并适当选取捷联矩阵,则捷联方案无需高精度测量惯性测量单元相对载体旋转角速度也能大大提高载体角速度的精度。
By this, raise some practical and effective measures to bring sealing ring function and effect into full play in many ways, such as improving superficial processing quality, choosing proper velocity in motion and sealing gap, improving O sealing ring quality and so on. 在此基础上,又从提高表面加工质量、选择适当的运动速度、密封间隙、改善O形密封圈自身质量等多个角度提出了充分发挥密封圈功能的几条切实可行的措施。
SELECTION OF CHOKING VELOCITY CORRELATIONS IN VERTICAL PNEUMATIC CONVEYING A proper operating gas velocity field and the correlation equations of the choking velocity and the mass flow ratio are proposed. 在试验的基础上,提出了在一定的固气比范围内垂直输送的适宜操作气速,及噎塞速度与质量流率之间的关联式。
The relationship between fracture patterns and Z-direction properties was investigated systematically. And corresponding measures were brought forward at the same time, such as reducing sulfur content and maintaining proper Ca/ S proportion when smelting, keeping proper temperature and velocity when casting, etc. 系统研究了不同断口形貌与Z向性能之间的对应关系,并提出了改善Z向性能的相应措施,如冶炼时降低含硫量、保持合适的Ca/S,浇注时保持合适的注温注速等。
The modeling result shows that the proper diffusion coefficient is influenced by mass concentration, type, flowing velocity of fluid and rock permeability, etc. 模拟结果表明,扩散系数受流体质量浓度、类型、流速和岩石渗透率等因素的影响。
The results show that in a proper range, increasing the rolling reduction and cooling velocity could increase the amount of M ( C, N) and refine the particles of M ( C, N). 试验结果表明,在适当范围内,增大轧制变形量和冷却速度有利于增大M(C,N)相粒子的析出量,且有利于M(C,N)相析出粒子的细化。
It is very important to keep proper liquid upflow velocity during the whole start-up period. 在整个启动期保持适当的液体上升流速是非常重要的。
It is based on a proper decomposition of the ship motion in horizontal and vertical components. Proper imaging intervals in order to obtain high quality ship images are selected using the estimated rotating angular velocity and Doppler extension. 它将转动分量作了水平、垂直分解,估计出旋转角速度和多普勒展宽,并借助于它们选择最优成像时间段以得到较高质量的舰船图像。
Only are the proper velocity, appropriate temperature and the good press chosen well, the infrared window can be made well. 在制备过程中,选择适当的成型速度和成型温度及压力,可以制备出性能优良的红外窗口。
Based on a thermal comfort experiment, studies the influence of increasing air velocity on human thermal comfort and the proper air velocity. 基于热舒适实验,研究了提高室内空气流速对人体热舒适的改善程度以及空气流速的合理取值。
Hypereutectic Bi/ Bi-Mn in-situ composites with ideal layer-separated and unidirectional growth structure can be prepared by a new solidification method, centrifugal unidirectional solidification, in the condition of proper rotating velocity of crucible and growth rate. 在适当的坩埚旋转速度和生长速度下,采用新型凝固工艺&离心定向凝固,可获得具有较理想的分层且定向生长的过共晶BiMn合金自生复合材料;
To investigate the aerodynamic design ideas and concrete methods of high performance Low Pressure Turbine ( LPT) at low Reynolds number condition, a new LPT of high load, large chord and proper velocity distribution was designed. 为了探索高空低雷诺数情况下高性能低压涡轮部件的气动设计思路和设计方法,通过采用高负荷、大弦长的叶片设计和选择恰当的叶片表面速度分布形式设计了一台新低压涡轮。
Based on the law of motion for transporting pipes in hose mining system, calculation formulas have been derived, by adopting proper empirical formular for ocean current and gravity wave theory, for relative velocity between seawater and pipes and its acceleration while transporting pipes moving. 根据软管采矿系统工作时管道的运动规律,采用合适的海流速度的经验计算公式和微幅重力波理论,推导出了输送管道运动时海水质点与管道的相对速度和加速度的计算公式;
The choice of the proper jet velocity is discussed quantitatively. 对适宜喷口速度的选择进行了定量的研究。
Suggesting that when you select the proper velocity, a good air conditioning effect can be achieved in the cold air conditioner. 提出选择适当的送风速度,在低温送风空调系统中能获得满意的空调效果的观点。
By utilizing aided information file and setting proper F code, velocity control of each axis is implemented which can facilitate improvement of machining quality and efficiency. 通过设置指令进给速度和采用辅助信息文件,实现了对各坐标轴速度的合理确定和控制,可以有效提高加工的质量和效率。
By applying CFD to simulate designs and improve on the inconsequential designs, it can make the symmetrical distributing of velocity and temperature of air in HVAC, obtain a proper value of velocity and reduce the yawp value. 通过应用CFD技术对蒸发器总成进行数值仿真设计并改进设计结构上的不合理部分,可以达到使总成内空气的速度、温度得到均匀的分布,得到适当的速度值以及降低噪声的目的;
By selecting the proper items from the down-pull manus of cultivar, month and tree vigor as well as inputting the values of solar radiation, air temperature, wind velocity and relative humidity during 11: 00-14:00, the prediction results of fruit sunburn could be obtained immediately. 通过在本模型的用户界面下拉菜单中选择品种、月份和树势,并在相应位置输入当日11:00~14:00平均日照、气温、风速和相对湿度数值,即可得到当日是否发生果实日灼的预测预报结果。
Conventional methods that are on basis of refraction arrival time or microlog cannot yield proper LVZ velocity or static quantities in areas with complex near surface conditions. 常规的(基于折射波到达时或者微测井等)方法在复杂近地表条件下很难求得正确的低速带速度和静校正量。
The results show that high molecular polymer additive with a proper concentration can reduce the energy loss while the fluids flow in pipe and out of nozzle, improve the velocity and dynamic pressure at the nozzle outlet and increase the length of isovelocity core of jet. 结果表明,在合适的浓度范围内,高分子添加剂可以降低流体在管路中和喷嘴处的能量损耗,提高射流在喷嘴出口处的速度和动压力,并使圆射流的等速核增长。
This paper aims at selecting proper friction materials for the use under high hydraulic pressure and linear velocity, based on researching the friction and wear mechanism of piston ring seal in specific conditions. 本文主要目的是在高速高压条件下,对涨圈密封的摩擦与磨损机理进行研究,从而为后期选材建立理论基础。