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central distances
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  中心距
     By using the number of small gear teeth, normal module and first two-stage transmission ratio in every grade of cylindrical gear reducer as design variables, the minimum of overall gear central distances in reducer as objective function is derermined, and an optimization design mathematical model of three-stage cylindrical gear reducer is devoloped. The results of the optimization are more satisfying than normal design.
     以圆柱齿轮减速器各级传动中的小齿轮齿数、法面模数以及前两级传动比作为设计变量,以减速器各级齿轮中心距之和最小作为目标函数,建立了三级圆柱齿轮减速器参数优化设计的数学模型,优化结果和常规设计参数相比效果显著.
短句来源
     Using the number of pinion teeth,normal module and the first two-stage transmission ratio in the cylindrical gear reducer as design variables,Using the minimum of every stage central distances in reducer as objective function,an optimization design mathematical model of three-stage cylindrical gear reducer is established and an available optimization software is developed.
     以三级圆柱齿轮减速器各级齿轮中心距之和最小作为目标函数,以减速器中的小齿轮齿数、法面模数以及前两级传动比作为设计变量,建立了三级圆柱齿轮减速器参数优化设计的数学模型,并研制了相应的通用优化设计软件。
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  “central distances”译为未确定词的双语例句
     During the process of exchanging the coordinate dimensions to a series of holes,It′s necessary to set the safe area for composition tolerance zone to the hole′s central distances and expand the area according to different boundary conditions. At last,devived the calculation formula of coordinate dimensions tolerance.
     在孔系坐标尺寸换算过程中 ,首先设定孔心距综合公差带安全区 ,并按不同的边界条件对安全区进行扩展 ,最后导出坐标尺寸公差的计算公式。
短句来源
     The ratio of central distances of prediction examples is defined, in order to locate the un-stable prediction examples.
     针对预测样本在预测性能及预测结果方面存在的差异,引入预测样本中心距离比的概念对其进行简单的划分,得到一些富有启发性的结果.
短句来源
  相似匹配句对
     Mincom Central
     明科中心
短句来源
     the Central and the Local;
     二是处理好中央与地方的关系;
短句来源
     The ratio of central distances of prediction examples is defined, in order to locate the un-stable prediction examples.
     针对预测样本在预测性能及预测结果方面存在的差异,引入预测样本中心距离比的概念对其进行简单的划分,得到一些富有启发性的结果.
短句来源
     This regression equation reveals the relationship among population flow,GDP and distances of the central city and the member cities.
     该模型揭示了中心城市与成员城市之间的人流量与两者经济总量及距离之间的关系;
短句来源
     The Determination of the Batting Pionts and Distances
     挥击击球点距的测定
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  central distances
RecentlyOmote showed that the Coda waves contain three periodsT1,T2,T3 of whichT1 increases with epi-central distances as observed by previous observers.
      
The diameter of the prisms and their mutual central distances were far greater than in the enamel of any known representative of present mammals.
      


The predictive calculations of the distribution of temperature and of heat flux in a reheating furnace may represent the roost important prediction of industrial furnaces.It is helpful not only to simplify the automatic control of furnaces but also to enhance the efficiency of thermotechnical automation.Main predictive calculation for this purpose performed nowadays is based on the zone method by H.C.Hotte[1],Since this method has only a restricted application in that the elementary gsseous zones (or surface...

The predictive calculations of the distribution of temperature and of heat flux in a reheating furnace may represent the roost important prediction of industrial furnaces.It is helpful not only to simplify the automatic control of furnaces but also to enhance the efficiency of thermotechnical automation.Main predictive calculation for this purpose performed nowadays is based on the zone method by H.C.Hotte[1],Since this method has only a restricted application in that the elementary gsseous zones (or surface zones) must be divided into the form of cubes (or into squares),it is necessary to introduce a new method for calculating the one-way direct exchange area by which the prediction for industrial furnaces can be used more widely and conveniently.With the replacement of cubic (or square) zones by rectangular zones,the induced formulae for calculating one-way direct exchange areas under eight different conditions are derived.Two types of induced formulae,which may be considered as the representatives of those under eight different conditions,are offered in this paper.In one case the direct exchange area lies between two parallel planes,and in other the exchange area lies between two gaseous zones.The induced formulae derived,determining the allowed values of exchange areas and providing for the equations of heat equilibrium,are applicable to the mathematical models of computers.The results computed are relatively precise.A group of equations of heat equilibrium in which all the divided zones in a furnace are involved may be solved simultaneously by a computer.Therefore,the space distribution of the temperature of gas and surface and that of the heat flux can be determined.Finally,the accuracy of results calculated by a computer is discussed and a ratio of length to width of divided zones of not more than 1.2 is proposed.NOMENCLATUREs——surface zone;g——gaseous zone;i,j——signs of segments divided from a zone;"__"——top line up the sign shows the direct exchange area;Q——radiation ability of one-way heat transfer (kcal/h);E——radiation intensity (kcal/m2·h);T——absolute temperature (K);V——volume (m3);K——gas absorbance (1/m);m,n——positive integers;r——central distance between two zones or two elements;x,y,z——cartisian coordinates (m);θ——plane angle (rad.);ψ——space angle (rad.);A,B,C——signs of divided zones (in addition,B is also the marginaldimension of zone); a,b,c,d,e and f——dimensions (m);":="——assigned symbol;xi——calculated value of direct exchange area between two zones;(xi)N——theoretical value of xi;ηΔ——relative error

本文用逐次局部再分法导出了用于工业炉预示计算数学模型中计算直接交换面积的诱导式,它比H.C.Hottez法适用范围更广、更方便,和用电算可较准确地确定任意两段间的直接交换面积的允许值,从而提供任意段的热平衡方程式;而所有各段的热平衡方程组电算联立求解,可用来确定炉内气体的和表面的温度及热流的空间分布。

A study on the effects of several factors, such as seismic magnitudes, epi-, central distances and local soil conditions on the configuration of, the ground acceleration response spectra (magnification curve) is presented. The results show that the magnitudes and the soil conditions would gite more significant effects on the response spectra than the epicentral distances;do. In addition, a series of improved designed spectra are recommended to be used in the earthquake resistant design.

本文利用日本强震观测资料,对于影响加速度相对反应谱(放大系数)形状的各种因素分别进行了研究。结果表明:震级和场地条件对反应谱形状的影响要远比震中距的影响明显。并在此基础上建议了可供设计使用的改进反应谱曲线。

In this paper, the central distance thinkness and backlash of the gear pair are regarded as a plane dimension Chain,and then the check formula of the gear-pair backlash is derived.lt supplemented the calculation of the value of K given by JB179-81-the accuracy system of involute cylindrical gear. The value of K is the backlash reduction produced due to the errors in machining and assembling of the gear pair.

本文将齿轮副的中心距、齿厚和侧隙看作平面尺寸链,推导出验算齿轮副侧隙的公式。对渐开线圆柱齿轮精度制JB179—81中K值(由齿轮加工和安装误差所造成的侧隙减少值)的计算做了补充。

 
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