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Secondly, by applying inverse Fourier integral transform to the displacement, and uniting the constitutive and geometrical equations, the analytical expression of stress in Laplace domain were derived. Thirdly, by defining dislocation density functions, the Cauchy singular integral equations were obtained according to the boundary condition and interface connection conditions, and the problem was reduced to algebraic equations by Chebyshev orthogonal polynomial. Based the these, the unknown coefficient of the algebraic equations can be solved by Schmidt method. Finally, the time response of dynamic stress intensity factor and energy release rate are obtained by inverse Laplace transform.

首先,利用积分变换方法,推导出粘弹性层的控制方程组;其次,引入位错密度函数,并结合边界条件和界面连接条件,导出反映裂纹尖端奇异性的Cauchy型奇异积分方程组,然后,应用Chebyshev正交多项式化奇异积分方程组为代数方程组,并采用Schmidt方法对其数值求解,最后,经过Laplace逆变换,求得动态应力强度因子和能量释放率的时间响应。

In the second chapter, the concept of an integrated abstract delay equation is introduced, and the equivalence of the well - posedness of an integrated delay equation and an associated integrated Cauchy problem is derived.

在第二章中,引入了积分抽象时滞方程的概念,并且得到积分抽象时滞方程的适定性与相应的积分柯西问题适定性等价。

In order to eliminate direct current drift and saturation problems of pure integrator for back electromotive force,an improved programmable low-pass filter rotor flux estimator was proposed to replace the pure integrator.

为了有效抑制反电动势积分环节所存在的直流偏移和积分饱和问题,采用一个截止频率可根据输出频率进行自调整的低通滤波器来代替传统电压模型磁链观测器中的反电动势积分环节。

Few nontrivial multiple integrals expressible in terms of simple analytic formulas are known.

归纳积分算子的迭核的过程中,多重积分在特殊迭核的情况下被表示为单积分。

In the integral formula of Fourier transforms of option pricing formula,by using residues theorem two integrations were simplified into a single numerical integration which has a faster rate of decay.

在期权定价公式的傅立叶变换积分公式中,运用留数定理将公式中的两个积分式子化简成一个被积函数衰减较快的积分函数式,从理论上提高了计算效率,缩短了计算时间,为投资者快速计算期权价值节约了时间。

It is difficult to compute directly the coefficients from the integral formula, since the integral function in the formula of the ideal digital fractional differentiator is a high-order oscillating function.

从理想数字分数微分器系数计算公式的特点考虑,利用变量代换把积分函数中的振荡因子转换成积分上限,避免高阶振荡函数积分计算,给出了计算分数微分器系数的递推公式。

The subsection integral is used to get a simple function at first in the numerical calculation, and boundary integral is realized by gauss integral on each panel and line, then the complexity and isstability as a result of the high frequency surge function can be avoided.

数值计算中,首先采用分部积分对被积函数进行简化处理,然后采用高斯积分实现面元和线元上的积分,避免了被积函数为高频振荡函数所带来的数值计算的复杂性和不确定性。

Methods According to the accumulated scores of myasthenic crisis prediction, the patients with myasthenia gravis who underwent thymectomy in the past 5 years were divided into 2 groups: high risk group(12, n=11). The time of mechanical ventilation, restoration of muscle strength and spontaneously breathing during extubation, results of arterial blood gas analysis, body temperature, chest X-ray examination and sputum culture of each patient were analyzed.

32例ICU收治的重症肌无力胸腺切除术后的患者,根据危象预测积分,分为普通组(积分<12分,n=21)和高危组(积分>12分,n=11),对两组患者术后呼吸机支持时间、拔管前后肌力恢复情况、自主呼吸情况、动脉血气分析情况以及两组患者术后体温、胸片和痰培养结果进行统计分析。

In software,I used location PID control algorithm to achieve the right systemPID tuning parameters, PID controller is the ratio of integrals,integral saturation correction factor, the parameters such asintegration time, Due to reasons of space calculation unmanifestedas if this thesis, it is in the final process directly give thevalue.

在软件实现中,本人采用位置式PID控制算法来实现对系统PID参数的整定,得到PID调节器的比例、积分、饱和积分修正系数、积分时间等参数,由于篇幅原因计算过程未列如本论文内容中,只是在最后程序中直接赋予各值。

In addition,the recursive summation method for programming the kirchhoff's integral formulation is discussed in detail.

详细论述了将Kirchhoff积分公式程序化的循环累加法;并着重分析了不同积分面及其网格划分对积分精度的影响。

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推荐网络例句

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因,如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务,你就做你的事好了。

Who is in possession of this?

这是谁的?