approximate methods造句
例句与造句
- at last, an approximate method for evaluate fatigue life of structures under repeat random stress block is presented through a lot of calculation examples
进一步分析了随机应力循环下结构的疲劳损伤，导出损伤演化的递推公式，并结合大量的计算给出结构在应力块重复循环下疲劳寿命估算的一个近似方法。 - the accurate numerical method for calculating the coupling factor and the receiving power at near field of the optical fiber is necessary to diminish the error risen from some approximate methods published
对光纤耦合系数和近场范围内的光纤接收光强的测量数据的分析必须使用准确的方法计算，近似方法存在较大的误差。 - the method can transform the h control problem of time delay system into the well-developed h control problem without time delay . second, the approximate method is applied to the structural seismic response control
该近似方法可以将时滞线性系统的h_控制问题转化为已得到完全解决的无时滞线性系统h_控制问题。 - the elastoplastic finite element method overcomes the limitation that only the uniaxial local stress and strain could be calculated by the approximate method, establishing the base of multiaxial fatigue analysis
弹塑性随机有限元分析，克服了以往近似方法只能计算单轴局部应力应变响应的缺陷，为多轴疲劳分析建立了基础。 - for each stiffener element, the average stress-strain relationship under axial load as a beam-column in the flexural buckling mode is derived based on the approximate method, proposed by gordo and guedes scares
这种方法对传统船型是有效的，但是它不能给出船体极强度的真实估算，而且当应用于非传统船型时其计算结果不能令人满意。 - It's difficult to find approximate methods in a sentence. 用approximate methods造句挺难的
- abstract : an approximate method has been used in this paper to calculate the stress concentration factor for a finite wide plate with a small circular hole under tension . the stress concentration factor has been obtaind analytically
文摘:采用一种近似方法，对含偏心小圆孔的有限宽板条在单向拉伸时孔边的应力集中系数进行了求解，得出了解析表达式 - at last, all the factors which may affect the model test mainly for creep & shrinkage effect and the principle for designing model have been discussed, and an approximate method to deduce camber of original bridge from model deflection is presented
对桥梁结构徐变试验的影响因素及处理原则进行了研究，提出了从模型梁徐变上拱值推算原型梁徐变上拱的方法并建立了近似计算式。 - numerical solution is mainly applied for this problem . adopting certain assumptions, this paper presents an approximate method of obtaining the temperature field by green's function, and gives the solution of a two-dimensional field involving a circular vacant flaw
通常采用数值计算，本文通过采用一定的假设条件，提出了温度场解析求解的近似方法，并对含有二维圆形空腔缺陷的试件温度场进行了求解。 - trust region methods has drawn our attention increasingly as one approximating method guarantees general convergence . its basic step is as follows : first, we set trust-region radius, and then we get a trial step produced by constraint quadratical model
信赖域方法是近年来日益受到关注的一种新的保证算法整体收敛性的逼近方法，信赖域方法的基本步骤是首先指定一个信赖域半径，然后用带约束的二次模型来确定搜索方向与步长大小。 - such limit is not due to the method itself, but is due to the limits of the speed and memory of computers . at present, we mainly use the high-frequency approximate method to analyze the electrical-large size target whose shape is relatively regular
矩量法不适于分析电大尺寸的物体，这种限制不是由于方法本身，而是硕士学位论文凡1入ster’5th卜515由于计算机速度与存储能力的限制。目前主要采用高频近似方法来研究电尺寸较大而形状相对规则的目标。 - but using the high-frequency approximate method to deal with the coupling of parts of electrical-large size target is troublesome as well as not accurate . combining the moment method and the high-frequency approximate method is a development trend and study way in the future
但高频近似方法对于电尺寸大而形状很复杂的散射体各部件之间的相对祸合处理起来有些麻烦且不很精确。将高频近似方法和数值方法(如矩量法)相结合，是以后的发展趋势和研究方向。 - but using the high-frequency approximate method to deal with the coupling of parts of electrical-large size target is troublesome as well as not accurate . combining the moment method and the high-frequency approximate method is a development trend and study way in the future
但高频近似方法对于电尺寸大而形状很复杂的散射体各部件之间的相对祸合处理起来有些麻烦且不很精确。将高频近似方法和数值方法(如矩量法)相结合，是以后的发展趋势和研究方向。 - abstract : approximate methods for calculating aerodynamic heating rates on space shuttles are discussed . various methods are given for predicting the heating rate at axisymmetric stagnation points, general three dimensional stagnationpoints and the leading edge stagnation point of wings . numerous laminar and turbulent heating techniques for flat plates and cones are analyzed and compared . a brief review of some methods is presented to predict heating rate for winward centerline and lateral direction off the symmetry plane . the results show that the methods are simpler and can guarantee enought precision for predicting aerodynamic heating environment of space shuttles
文摘:介绍了国内外预测航天飞机气动加热的工程计算方法.给出了轴对称、非轴对称和机翼前缘等各种外形驻点热流密度的计算，分析和比较了平板、锥体的层流和湍流热流密度计算的各种方法，概述了航天飞机迎风面中心线和离开中心线横向热流密度的计算.计算结果表明，本文方法用在航天飞机气动热环境初步设计中比较简单并且有足够精度 - imev and the data in which the energy respectively is 166mev 139mev, 104mev, 90mev . on the basis of two wave functions and two optical potentials above mentioned, we have investigated a serie s of knockout reactions : through the comparing of two wave functions and two optical potentials, we find that two a cluster relative vave functions which contribute to the energy sharing results of the reaction sections are very well, especially for the; that the received spectroscopic factors used vfm ( r ) are better than that used; that the former not only suits to the elastic scatterings but also to the knockout reactions; that the a cluster of knockout reactions are its local behaviors of surface . and we further testify that the distorted influences are not neglected if the incidence energies are not very high, but can be used the plane wave impulse approximate method and neglect the effects of the distorted influences if the incident energies are high enough
在利用上述的两种束缚态波函数和两种光学势的基础上，我们研究了一系列的敲出反应：通过对比两种束缚态波函数和光学势，我们得到的结论是：两种束缚态波函数和光学势对反应截面的能量分配谱的贡献都比较好，但尤以波函数_(li)(r)为佳；光学势v_(clu)+(r)得到的光谱因子比用woods-saxon势v_(ws)(r)的结果要好，它不仅能适用于弹性散射，且对敲出反应也能得出比较好的结果；集团的敲出反应是集团表面局域性的表现：在中低能的入射条件下，扭曲效应不能忽略，但入射能量较高时，扭曲效应影响较小，可以用平面波冲量近似的方法。 - in the traditional reliability model, the probability density function of random variable is important . so, in chapter 2, the methods to get probability density function of engineering random variable are discussed . three methods, which include approximate method, monte-carlo simulation method and multiple parameter method, are compared by some examples . in chapter 3, some non-probabilistic reliability models are discussed
在传统的概率可靠性模型中，变量的概率密度函数的确定非常重要，因此在本文第二章中，主要着力讨论工程随机变量概率密度函数的求解方法，说明原理，推导求解公式，并通过实际算例对近似解析法、monte-carlo数字模拟法、多参数法三种方法进行对比。