查询词典 variation method

The extended Poincare map in this paper needs twosurfaces of sections transversal to the flow in phase space,i.e.,relates the crossing of a plane containing one of the collinear libration points back to the periapsis passage.Meanwhile,the map is calculated numerically using the Total-Variation-Diminishing Runge-Kutta integration method to get a good description of the Poincare sections.

文中的推广的Poincare映射需要在相空间中选取两个与流相截的面，即将包含某个天平动点的截面通过轨道来映射到近拱点的通道面上的，在数值上通过总变差减小的Runge-Kutta方法来实现两个相面之间的映射。

On the one hand, Lagrange hit upon the new idea to redefine the complete integral when he was inspired by his study on the first-order partial differential equation with the method of variation of constants.

在分析、比较欧拉和拉格朗日完全积分定义的基础上，依据原始文献，重点考究了拉格朗日重新定义偏微分方程完全积分的原因和动机。

Conjoint analysis is a method that can effectively reflect the variation of consumer needs; hence it is widely applied in the research of market segmentation.

联合分析是一种有效地反映消费者需求差异的方法，所以被广泛地应用到市场细分的研究中。

These words—"change,""Chinese situation,""variation,"and "paradigm," did not only describe the contemporary artist, Wei Guangqing, his working method, and typical appearance of artistic personality, but also pointed to another theoretical question worthy of consideration—Chinese modern art's contemporaneousness and indigenousness. The word "paradigm" also pointed to this specific context.

依次出现的关键词"改变"、"中国情境"、"变异"及"范例"，不仅钩勒了作为当代艺术家的魏光庆其作品方式与艺术个性的特殊面貌，更凸显了一个值得深入思考的理论问题—中国当代艺术的"当代性"与"本土性"问题，"范例"一词亦当就此而言。

He proved that the left ward turning of Yangtze river diluted water is mainly resulted from the interaction between the bottom declining and the lag of the transversal pressure gradient, made the numerical simulation and preliminary study on the thermohaline staircase structure formation mechanism, improved American Academician Wunsch's inverse method of ocean circulation, jointed the discover of " Mindanao Under Current", which is the first ocean current found and named by Chinese scientists and widely accepted over the world, simulated the horizontal and vertical carbon fluxes in East China Sea by a simple ecosystem model, estimated the photosynthesis efficiency less than 8% in Jiaozhou Bay, applied statistical downscaling technology to Chinese coast and Japanese islands realizing the simulation and forecast of sea level low frequency variations, pointed out that the quasi-periodicity of El Nino events should be resulted from the interaction between the 3~4 year oscillation in tropical Pacific and decadal oscillation in the northern Pacific of middle latitudes of the air-sea coupled climate system and at decadal time scale the precipitation influence on sea level variation along Chinese coast and Japanese islands becomes more important, which is closely related to the decadal oscillation of air-sea coupled climate system, therefore precipitation most likely play a major role for the decadal oscillation formation;; proposed Extended Associate Pattern Analysis to analyse combined observed datasets of sea surface temperature and sea level pressure or geopotential hight at 1000 hPa (GH1000) over the Pacific and related seas.

论证了长江冲淡水向左转向主要由于底形下倾与横向压力梯度滞后相互作用的结果。对温盐阶梯结构的形成过程及物理机制进行了数值模拟与初步探讨。改进了美国科学院院士Wunsch的大洋环流反演法。与胡敦欣院士共同发现了"棉兰老潜流"，这是第一支由中国科学家发现、命名并得到普遍承认的洋流。借助较为简单的生态模式数值模拟了东海的水平与垂直碳通量；胶州湾浮游植物的屏蔽效应可以使底层海水温度在升温季节降低2度，由此推算出其光合作用的效率应小于8%；浮游植物春季水华的生物过程实际上强化了海水层化的物理过程。将统计学降尺度技术应用于日本列岛和我国沿海，实现了海平面长周期变化的模拟与预报。

The optimal collocated positions of secondary source with two microphones are studied and the separate of transfer function method that reduce the influence of acoustic feedback are developed based on plane wave transmission theory of sound and concept of transfer function in a duct. After, In order to identify the variation of the signals and find out individual correlation coefficient, cross correlation function analysis between primary noise signal and reference input signal is processed.

本文根据管道声场的平面波传递理论，进行第二声源与两个感测麦克风之间的位置配置研究，配合数位讯号处理的技术，发展出转移函数分离法，以消除声场回授的影响，之后，再将使用和未使用转移函数分离法的讯号个别与主要噪音源讯号做交互相关函数的运算处理，辨识讯号之间的差异，找出个别的相关性系数。

In order to correct the locality and partiality in the classical analysis method for investment, a genetic algorithm used in short-term stock investment analysis is proposed. Significance of chromosome, adapt value parameter in the stock market is explained and an applied scheme of selection, crossbreed, and variation operator is designed.

针对传统投资分析方法的局限性和一定程度的片面性，提出将遗传算法运用于股票短期投资分析，具体解释了染色体、适应值等参数在股市分析中的实际意义，并设计了选择、杂交、变异算子的使用方案，同时改进了算法——提出"伸展算子"。

It presents a relatively detailed description of th e epidemic condition, of viral diseases of fishes,method of their prevention,con trol and treatment; the characteristic of pathogens;variation of hosts;and the h istopathological features.It aims to make the culturist realize that viral disea ses have broken out frequently in the world, and pay more attention to it.

摘 要 综述了中国台湾地区及世界其他主要海水养殖国家和地区的养殖鱼类病毒性疾病的流行情况、防治方法、病原特征、宿主范围和组织病理学特征，目的在于让养殖者了解鱼类病毒病已在世界范围内频发，希望能引起各方面的重视。

In the proposed method the data from state estimation or power flows during larger time interval is used to calculate nodal voltages and the initial value of current transitive-relationship matrix; the variation of diagonal elements of this matrix reflects the variations of the detailed models of system components, network topology and parameters after the perturbation, then by use of the PMU measured data in millisecond level the primary diagonal element can be modified.

该方法采用时间间隔较大的状态估计或潮流数据计算节点电压和电流传递关系矩阵的初值，并利用该矩阵主对角元的变化反映受扰后系统各元件的详细模型、网络拓扑和参数的改变，然后使用相量测量单元毫秒级的量测数据对其进行修正，从而为在实际应用中将相量测量单元与SCADA系统相结合做出了有益探索。

Volumetric errors under different temperature conditions are measured by the sequential step diagonal measurement method, and the variation curves of the 9 synthesis errors are obtained.

通过使用可以快速测量空间定位误差的分步体对角线测量方法，在不同的温度条件下对数控机床进行了误差的测量，得到了机床9项位置误差随温度变化的曲线。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。