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A sample numerical design method for constant beamwidth beamformer is given. This method is easy to implement and has no restriction on array geometry and sensor patterns; Three methods for the design of broadband frequency invariant beamformer are proposed, which are the method of resampling signals received by the array, the DFT interpolation method and adaptive synthesis method, respectively. Examples and performance analyses are given for each method; A simplified linear constrained minimum variance broadband adaptive algorithm that based on DFT interpolation method is presented. Compared with conventional broadband adaptive algorithms, the presented method can reduce computation work greatly.

提出了一种简单、易于实现的恒定束宽波束形成器设计方法,该方法对阵形和阵元指向性没有任何限制;分别提出了基于阵列接收数据重采样、基于DFT插值和自适应综合的三种具有频率不变波束图的宽带波束形成器设计方法,对于每一种设计方法都给出了一个设计实例并做了性能分析;提出一种基于DFT插值的简化线性约束最小方差宽带自适应阵列算法,该方法可以大大降低自适应阵列的运算量。

Based on the analysis of one-class classification, a clustering method based on one-class classification is put forward.

在分析一类分类方法最新研究成果的基础上,提出了基于一类分类的模式聚类方法,通过与传统聚类方法的比较,说明该方法对非线性数据处理聚类的优越性,并以某企业对供应商关系调查数据为例,将这种方法应用于企业供应商关系分析中。

So in order to improve the convergence of Ritz vectors, firstly, refining -strategy is applied to the Davidson method in this paper. The process restarts with the refined Ritz vectors as the initial vectors, and then we get the refined block Davidson method. By analyzing the convergence of the new method, we give the theorem of it.

为了改善Ritz向量的收敛性,本文首先在块Davidson方法的执行过程中,运用精化策略,求出相应的精化向量并将其作为初始向量进行重新开始过程,由此得到了精化块Davidson方法,并对精化块Davidson方法进行了收敛性分析;其次,本文将精化块Davidson方法结合收缩技术,提出了收缩的精化块Davidson方法

Chapter 4 is the central part of this dissertation, where the bayes bilateral integrated moment is established on the base of Bayes theory, downside risk and upside potential. According to the variation coefficient which is based on the M-V approach, we substitute lower partial moment for the numerator of variation coefficient, and use higher partial moment as the substitute of the denominator, then we got bilateral integrated moment. Subsequently, through Bayes method we can absorb new information, revise the return distribution from transcendental distribution to posterior distribution, so we got bayes bilateral integrated moment.

第四章是本文的核心部分,在简要介绍Bayes理论、下方风险和上行潜能的基础上,仿照来源于Markowitz的均值——方差理论的变异系数方法,以下偏矩取代其分子部分,以上行潜能取代其分母部分,设计了双侧综合矩方法,接着再引入Bayes方法,吸纳新信息,采用后验概率,设计了Bayes双侧综合矩方法,并在理论上说明了新方法的优越性。

The main research work and its results are: 1Empirical results are analysed for the relations of fault displacement and earthquake magnitude, and difference between permanent ground deformation and maxium dynamic relative displacement on the two sides of fault; 2An analytic method is proposed for resopnse of a buried pipeline due to earthquake fault movement; 3A new shell model with an equivalent boundary and relted finite element analysis method are proposed for estimating response of a buried pipeline under large fault movement; 4By the proposed method, damage performance of water supply steel pipelines with large diameter is simulated to the real cases in Kocaeli Earthquake and Ji-Ji Earthquake, and simulating results show the real failure mode of pipes is revealed; 5Effects of overlying soil and soft/hard interlayers are analyzed on ground rupture mode and degree due to earthquake fault, and some earthquake rupture phenomena in soil layers are theoretically described for the first time; 6Pipeline response characters are discussed for the case of considering effects of soil layers on ground rupture mode; 7Research results and proposed method are applied in seismic analysis of pipline acrossing fault in the Gas Tansportation Project from West to East in China.

主要工作和成果包括:1)分析了不同断层位错形式下地表破裂位错量与震级之间的经验关系,并基于集集地震近断层记录分析了断层两侧永久地面变形和地震动相对位移幅值之间的差别,为合理地考虑地震断层位错地面变形动态影响提供了依据;2)发展了断层位错地面大变形下管线反应分析模型并给出物理概念明确、简单实用的解析分析方法;3)建立了断层位错下埋地管线反应分析的等效边界壳模型有限元方法方法中引入了以非线性弹簧形式模拟离断层较远处管段影响的等效边界,简化了计算模型并突出了近断层处管体反应;4)利用等效边界壳模型方法,对土耳其地震和集集地震中大口径埋地管线震害进行了模拟,结果表明所提方法可以更清地解释震害所表现的管体破坏特征;5)研究了覆盖土层和软硬夹层的存在对断层位错地面破裂形式和程度的影响,首次从理论上解释了某些地震地表破裂现象;6)探讨了考虑土层对断层位错地面变形影响的管体反应特征;7)本项目成果已在西气东输工程的管道跨断层抗震问题分析中得到了应用。

In this chapter, three kinds of target recognition methods are performed, which are:①Target recognition method based on the description of polarization parameter plane. The echo polarization states of target are projected onto the polarization state plane described by the ellipticity ε and the tilt angle τ of the polarization ellipse, the change of parameter following ferquency becomes the chart. According to the changing trait of the chart, the multidimensional polarization feature space of target has been contructed. Furthermore, a series of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.②Target recognition method based on the description of Poincare polarization sphere. The echo polarization states of target expressed by Stokes vector are projected onto the Poincare polarization sphere. The conception of polarization ferquency stability, which is used in describing the dynamic distribution characteristics of the target echo polarization states on Poincare polarization sphere, has been defined. A group of polarization feature parameters used in designing the structure of target recognition device are extracted, and they are insensible to the posture of target.③Target recognition method based on the description of frequency sensitivity. In accordance with the conception of the polarization state distance defined on Poincare polarization sphere, the frequency sensibility of the physical structure property of target has been investigated, the frequency distribution feature curves in PSD domain are obtained, and targets'features are extracted by means of the curve-fitting method with Least Square Criterion.

这章具体研究了基于三种极化散射特性描述的相应的目标识别方法:①基于极化参数平面描述的目标识别方法,将目标回波极化状态投影到以极化椭圆参数,即椭圆率角ε和倾角τ表征的极化状态平面上,参数随观测频率的变化就形成了图,根据图的变化特点构造了目标的多维极化特征空间,并提取了不敏感目标姿态变化的极化特征参数组来设计目标的识别器结构;②基于Poincare极化球面描述的目标识别方法,采用Stokes矢量表征目标回波的极化状态,并将其投影到描述极化状态的Poincare极化球面上,定义了极化频率稳定度的概念用以刻画目标回波极化状态在Poincare极化球面上的动态分布信息,提取了准方位不变性的目标极化特征,最后设计了目标的识别器结构;③基于频率敏感性描述的目标识别方法,通过在Poincare极化球面上所定义的极化状态距离的概念,研究的是复杂目标物理结构特性对探测信号频率的敏感程度问题,获得了在极化状态距离下的频率分布特性曲线,采用最小二乘估计曲线拟合方法,它既用于极化特征的降维,同时又直接将拟合参数作为目标的分类特征。

Some new method is presented in this paper: A. An Integrated parameters computation method to analysis asynchronous operation of the turbine generator is given, including the equivalence of short circuit and open circuit of field windings, deducing boundary condition of 〓 method and computing frequency parameters. B. A new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time. C. An equivalent method of vacuum is presented, and effectively eliminate the effect of corner point and accelerate convergence of PCCG method. D. Coupling the computation of electromagnetic and temperature field is discussed and model for computing temperature field of the turbine generator rotor at asynchronous operation is built.

文中提出了以下新方法:(1)在失磁异步运行转子三维涡流场计算中提出了完整的参数计算方法,其中包括励磁绕组开、短路的等效,〓法边界条件的推导及频率参数的计算方法;(2)提出了铁心内空气域的等效方法,有效地解决了开槽引起的角点奇异问题,并提高了方程组的迭代收敛速度;(3)在〓法有限元模型中,创立了一种能节约内存、提高计算速度的压缩存储矩阵格式,并建立了基于该格式的方程组解法;(4)提出了涡流电磁场和温度场两种不同场计算的合理结合方法,建立了转子三维稳态和时变温度场的有限元计算模型。

As we well know, the symmetry reduction methods related to group theory, such as the Lie point symmetry method, conditional symmetry, generalized conditional symmetry and etc, are effective tools to study the exact solutions of the nonlinear partial differential equations.

众所周知,与群论有关的对称约化方法,如李点对称方法,条件对称方法,一般条件对称方法等,是研究非线性偏微分方程精确解的有效方法

We put forward a new theoretical method named direct laser spectroscopy method, it holds some goodness which spectral method has not, it also showed that it was one of the best methods in molecular dynamics simulation by combined with the best method named chebychev polynomial expansion in time dependent wave packet theory. This had been approved bv example of H〓.

我们提出了一种新的理论方法即直接激光光谱法,这种方法具有以往常用的谱方法所不具备的优点,即高效性,并且通过与含时波包理论中最具有优越性的切比雪夫多项式展开方法结合,使得这种方法在动力学模拟中具有极大的优势,并以H〓分子为进行实验例。

Plentiful and substantial achievements have been made, which motivate a lot of methods to obtain the exact solutions of solitary wave equations, such as: the homogeneous balance method, the hyperbolic function method, the power series method, besides the traditional methods, such as: the inverse scatting method, the bilinear Hirota method, and the Backlund transformation method etc.

求解孤立波方程精确解的方法除了传统的反散射方法、Hirota双线性方法、Backlünd变换方法外,近年来又涌现了很多新方法,如齐次平衡法、双曲正切法,级数展开法等。

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I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。

Ah may dee:You are chinese living in a democratic country.

你是居住在民主国家的中国人吧。