查询词典 perturbational

Using the Green function theory, the integral equation of perturbational parameters was obtained.

基于非均匀介质中波函数的局部理论和射线理论，引入了全波场的广义射线近似形式，通过定义介质参数函数，把反演目标归结为其第一类Fredholm积分方程。

Two kinds of obstacles are simulated on computer.The numerical results illustratethe efficiency of the method even if in the case of large perturbational parameters inelastic medium.

与传统的Born近似方法相比，对于大扰动参数介质几何反问题，给出了更为准确的重构结果。

The cone-subdifferential stability of efficicient point set of bilevel multiobjective optimization with perturbational parameters in lower level is considered.

借助集值映射最优化问题有效解的锥次微分稳定性理论，讨论了上层无扰动，下层带扰动参数的二层多目标最优化问题有效点集的锥次微分稳定性。

Computational fluid mechanics ; finite-volume method ; perturbational finite volume method

计算流体力学；有限体积方法；摄动有限体积方法

Biological samples are very limited usually, and resonant-cavity perturbational method especially fit for the measurement of micro amount samples settled with the limitation of sampling.

通常生物组织的取样数量十分有限，因此微量介质的介电常数测量在生物介质特性测量领域显得十分必要。

Then, the Perturbational Finite Volume Method is developed under the background of the traditional FV Method. Also, a computer program to get the PFV formula is given.

然后以此为基础，比较详细地描述了PFV方法推导过程，并建立计算机自动推导程序。

The inversion of large perturbational parameters in elasticmedium is one of important branch of the medium parameters inversion because ofits extensive engineering application background and the breaking down of thelimited condition in traditional inversion method.

介质参数反演问题是弹性动力学反问题三大研究方面之一，弹性介质中的大扰动参数反演问题作为介质参数反演的一个重要分支，因其广泛的工程应用背景以及对传统反演方法限制条件的突破而具有重要的意义。

This method not only combines the best features of balanced truncation and singular perturbational method, but also reduces the possibility of physical un-realization of the reduced model obtained from generalized singular perturbation method, according to a parameter chosen in the model-order reduction process.

新算法在广义平衡奇异摄动法降阶过程中引入一个实参数代替矩阵，不仅集成了平衡截断法和奇异摄动法的优点，而且减少了计算量，大大缓解了利用广义奇异摄动法得到的低阶系统可能面临的无法实现的问题。

The quasinormal modes and the late-time tails of perturbational fields in the black hole spacetime are related to the identification and stability of the black holes.

然而黑洞物理学中还有许多问题人们尚未弄清楚，像黑洞熵的统计起源、黑洞信息疑难以及黑洞是否稳定等都是黑洞物理中非常重要而有待解决的问题。

The perturbational reanalysis method of repeated eigenvalues and associated eigenvectors of the lineargeneralized eigenvalue problem is further investigated on the basis of the relevant results of previous stud-ies.

本文基于已有研究结果，进一步探讨了线性广义特征值问题的重特征值及其特征向量摄动重分析理论和方法，阐述了重特征值情形下摄动重分析方法的一些重要特点，完善了重特征值的特征向量的二阶摄动算式，并论证了重特征值摄动法与相异特征值摄动法之间的统一性。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎