查询词典 perturbation method

Aimed at the large deformation problem of industry cooling tower shell, the mathematical model for the random response of rotational shell under the external random excitation is established by statistic perturbation method.

针对工业冷却塔结构大变形的随机动力问题，利用统计摄动方法，考虑旋转壳法向几何非线性及随机激励作用，建立了旋转壳的非线性随机动力响应数学模型。

Employing the inverse perturbation method , we have tackled the problem of optimum design of the machine tool spindle.

用逆摄动法进行机床主轴的动力优化设计。

Key problems of this measurement technology in the microwave resonant cavity perturbation method implementation and measurement device development are studied.

研究了微波谐振腔微扰法测湿技术实现及测量装置研制中的一些关键问题。

According to the perturbation method, we also studied stability of the non-convex quadratic programming problem, defined by Tikhonov, A.N.

其次，我们研究的问题可视为Bar-On 与Grasse (1993，1997)问题的条件放松，因此我们可利用Bar-On 与Grasse 方法求得的解来逼近我们研究问题的解，然这就涉及到参数对问题解的连续性，我们期望能以扰动法来回答这「规划问题稳定性」的问题。

Ensor analysis ; helical tube ; heat transfer ; perturbation method

张量分析；螺旋管壁；热传导；正则摄动

Meanwhile, based on the MYT orthogonal decomposition, a new method identifying the direction of abnormality of multidimensional abnormal observations is brought forward. This method is robust and appropriate to inverse matrix method, adjoint matrix method and Gram-Schmidt method of MTS.

同时，提出了基于MYT正交分解法的多元系统马氏田口异常值异常方向确定方法，该方法具有很强的稳健性，适用于马氏田口的逆矩阵法、伴随矩阵法和施密特正交化法。

Derive recursive least squares method, recursive general least squares method, recursive augmented matrix method, recursive multiple-stage least squares method and recursive maximum likelihood method based on recursive Householder transformation by applying the three real-time solutions of overdetermined linear equation to difference model.

将线性矛盾方程组的三种实时解法应用于差分模型，导出了基于Househol-der变换的递推最小二乘法、递推广义最小二乘法、递推增广矩阵法、递推多级最小二乘法和递推极大似然法。

With regard to method of rural cadastral survey, from the point of view of technique, outlay, time and the exiting data of Beijing, four methods are mentioned: RTK GPS method, graphic method using landuse data, graphic method using SPOT 5, graphic method using avigation image.

在农村地籍调查方法方面，从技术、经费、时间和与北京市现有数据考虑，提出四种农村地籍调查技术方法：RTK GPS测量法、土地利用现状图图解法、SPOT 5遥感影像图解法和航空影像图解法。

At first it introduces the characteristics,method of designing the program,and method of editing the program of Mitsubishi FX2N.The method of designing and editing the program include the Experience Designing Method ,Sequencely Controlling Designing Method,and STL.Then,it concretely analyses and introduces the electrical construct,electrical feature,and program of the control systems of chemical fiber baler.

首先介绍了三菱FX2N的特性特点、程序设计方法和编程方法，程序设计方法和编程方法包括经验设计法、顺序控制设计法和STL步进梯形指令，然后详细具体地分析和介绍了化纤打包机控制系统的组成、电气特征和程序。

The works in the project just done can be summarized as five respects.(1) A device was designed to fabricate the asymmetrical resonant cavities by a pendant drop. A series ARCs with variable parameters provides a valuable experimental method for investigating the characteristics of ARCs.(2) The relationship between the number of active modes and the shape parameters in an ARC was investigated. The experimental lasing threshold was compared with theoretical result, the good agreement between two shown that it was the decrease of the number of active modes in an ARC that decreased lasing threshold.(3) Dye lasing gain was used to enhance the signals of stimulated Raman scattering of the weak gain Raman modes in a circular cavity made by a pendant drop, the instantaneous SRS spectra of weak gain Raman modes in ethanol was obtained by this new method.(4) The SRS signals of minority compound in a binary chemical complex was obtained by using dye lasing gain method. The detection concentration of minority compound was reduced to an order compared with normal SRS method.(5) A cylindrical circular cavity was formed by a liquid jet, which was used to reduce the pump intensity required for laser induced plasma spectroscopy. The limit of detection of trace element in aqueous sample was greatly decreased by this new method.

我们设计并成功制作了使悬垂液滴连续变形的装置，用此装置可以方便地改变非圆对称谐振腔的几何参数，为ARCs的研究提供了一种有效的实验方法；研究了ARCs中活性模式数和变形参数间的变化规律，激光阈值的数值计算结果和激光辐射的实验结果作了比较，二者吻合的曲线说明ARCs中活性模式数量的减少是受激辐射放大阈值降低的原因；在由单元化合物构成的微型圆对称谐振腔中，首次尝试用"激光增益"增强弱增益拉曼模式的受激拉曼散射信号，获得了乙醇分子中弱增益拉曼模式的瞬态SRS光谱；在由二元混合物构成的微型圆对称谐振腔中，用染料的激光增益增强了少量化合物的SRS信号，把少量化合物的SRS信号探测浓度降低了近一个数量级，在SRS应用于瞬态过程的组份分析方面做了卓有成效的探索；用石英毛细管形成的稳定液拄构成拄形谐振腔，降低了激光诱导等离子体光谱需要的激励能量，有效地降低了水相样品的痕量元素分析极限，为LIPS应用于微量元素的化学分析开拓了一条新的技术路线。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。