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Based on the linear elastic theory, the piezoelectric theory and magnetostrictive theory, using the power series expansion series method, a three-dimensional resolution of the natural frequencies of a simply supported rectangular laminate is investigated.

基于线弹性理论、压电理论和磁致伸缩理论，使用幂级数和傅立叶级数解法，得到了四边可移简支、磁电复合材料层合板的固有频率的三维精确解。

Based on the power series expansion of the general flexible matrix of the sub-system, a general expression of the dynamic stiffness matrix of the reduced model was derived from the exact expression of the reduced model for the direct substitution dynamic condensation methods. The general expression was also expressed as a power series of the unknown eigenvalues. After that, the validity and error of the Guyan condensation method were analyzed.

对于动力缩聚直接代入法，本文从降阶模型的精确表达式出发，利用子系统广义柔度矩阵的幂级数展开式，导出了降阶模型动刚度矩阵的一般表达，并把它表示为未知特征值的幂级数形式，在此基础上对 Guyan缩聚法的适用范围和误差进行了一般分析。

A general ring I is a clean general ring if and only if its power series ring is a clean general ring if and only if its skew power series ring is a clean general ring.

1一般环I是一般clean环当且仅当I的形式幂级数环是一般clean环当且仅当I的斜幂级数环是一般clean环。

High power and super-high speed semiconductor switch RSD has great advantages in pulse power system : simultaneous turn-on in all area, high di/dt, high speed, high power, low power loss, infinite series, easily used in series and parallel connection, low cost and long lifetime etc.

大功率超高速半导体开关RSD相对传统的半导体开关在脉冲功率领域具有显著的特点：全面积同步导通，di/dt高，开启速度快，开通延时几乎为零，功耗低，理论上可无限串联，串并联使用时触发相对简单，维护方便、成本低而且使用寿命长。

This article makes some thoughts about a series of problems such as the qualification ,the concerns and the words according to a series of teaching and research fruits achieved in the Chinese language teaching in recent years,then combining the practicalness of the Chinese language teaching in Xinjiang and the author s own teaching practice in the Chinese language integrated curriculum.

本文根据近年来汉语教学中取得的一系列教学科研成果，结合新疆汉语教学的实际及笔者自己的教学实践，就"汉语综合课"的定性、教学重点等问题进行了一番再思考，提出了自己的见解。

The Chinese folk custom series has had certain competitiveness in the world, and other fashion series are preponderant in the domestic market.

中国民俗系列在国际上已有了一定的竞争力，其它时尚系列在国内市场占有绝对优势。

JingPing Zheng, press spokesman of State Statistics Bureau, says that in the first half of the year the nation issues a series of policies to standardize development of real estate, which are mainly a series of measures focusing on the too much rise of the price of real estate in some cities," the focal point is not to suppress the development of real estate, but to impel the real estate to develop healthily ".

国家统计局新闻发言人郑京平表示，国家上半年出台的有关规范房地产开发的一系列政策，主要是针对部分城市房地产价格上涨过快所采取的一系列措施，"重点并不是要抑制房地产业的发展，而是想促使房地产业健康地发展"。

This paper proposes an efficient clustering algorithm for Multivariate Time Series—PCA-CLUSTER.The algorithm applies principal component analysis to reduce the dimension of MTS,and subsequently chooses the principal component series of MTS to cluster by a K-nearest neighbor algorithm.

提出一种高效的多变量时间序列聚类算法PCA-CLUSTER，首先利用主成分分析对MTS数据降维；选取MTS数据的主成分序列进行K近邻聚类分析。

PR2, PR3, PR9, BP3000, OKI series, LQ series printer paper ribbons and ribbon frame and so on.

PR2、PR3，PR9，BP3000、OKI系列、LQ系列票据打印机色带和色带架等等。

Protista Series"—express myself sensation of life mainly with the life of unicellular cell."Symbiosis Series—shows the relationship between human beings and I in my installation works.

系列创作如下：「涡旋系列」强调运行中的生命状态，「原生系列」以生物单一细胞作为主要表现对象，表现自我内在对生命的感知，「共生系列」则以装置作品为主，表现群我之间的关系。

I was up all night because I was in pain, she said.

我整夜，因为我在疼痛，她说。

A crow caws /craoks.

乌鸦叫。 51-论文网