The character signals of an internal combustion engine in operation were extracted by choosing appropriate sensor, improving the mounting method for the sensor and selecting test point reasonably.
主要叙述在内燃机不停机的情况下，通过选择恰当的传感器，改进传感器的安装方法和合理选择测点来提取机器特征信号。
Purchasing control is a strategy approach to Internal control of modern enterprise, The article study the point, of it the correlated procedure and method of Purchasing control.
采购控制是现代企业内部控制的重要环节，文章探讨了企业采购控制的重点及相应的程序与方法。
The elastic and plastic problem of thin-walled curved box girders is solved with the spline finite point method and the section internal force plastics coefficient method.
采用样条有限点法和截面内力塑性系数法对薄壁曲线箱梁的弹塑性问题进行了求解。
The equabions on tooth shape of internal gear by means of envelope method is derived and the pressure angle, inflection point, curvature, topcut are analysised in detail.
用包络法导出了内齿轮的齿形方程，对压力角、曲率、拐点、顶切进行了详细分析，并给出了计算公式。
Reasons for the internal vibration of steam turbine are discussed and analyzed from the point of view of design and manufacture. And also the article suggests method to avoid this internal vibration.
从汽轮机的设计和制造方面，讨论分析了引起汽轮机内部激振的各种原因，并提出了避免激振的方法。
Using the method proposed by this paper, deals with bending of the uniformly loaded elastic circular plates with internal symmetrical point supports.
本文应用文提出的方法，研究受内点对称支承，在均布载荷作用下的弹性圆板的弯曲。
Elastic finite element method are used to calculate the point of internal mould of the equivalent stress, equivalent strain, such as force and energy parameters and their distribution.
用有限元法计算了模具的温度分布，这为研究模具在不同温度条件下的应力状态做好了准备。
Elastic finite element method are used to calculate the point of internal mould of the equivalent stress, equivalent strain, such as force and energy parameters and their distribution.
用有限元法计算了模具的温度分布，这为研究模具在不同温度条件下的应力状态做好了准备。
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