查询词典 jacobi bracket

Our results improve the former results. For periodic Jacobi matrix, some new spectral properties of periodic Jacobi matrix are given by studying the relationship of the eigenvalues of periodic Jacobi matrix and its n—1 principal submatrix. Applying these spectral properties, we present a necessary and sufficient condition for the solvability of an inverse problem of periodic Jacobi matrices and discuss the number and the relationship of its solutions. Furthermore, we propose a new algorithm to construct its solution and compare it with the former algorithms. As this inverse problem of periodic Jacobi matrix usually has multiple solutions as many other eigenvalue inverse problems, we study the uniqueness of this problem. And a necessary and sufficient condition is given to ensure its uniqueness, under which an algorithm is presented and the stability analysis is also given. Finally, we put forward a new inverse problem for periodic Jacobi matrix which has not been solved.

对周期Jacobi矩阵特征值反问题，通过研究周期Jacobi矩阵与其n-1阶主子阵特征值的关系，给出了周期Jacobi矩阵的一些新的谱性质；利用这些谱性质，研究了一类周期Jacobi矩阵特征值反问题，用新的方法推导出了该类特征值反问题有解的充分必要条件，并讨论了解的个数以及解与解之间的关系；此外，提出了一种新的构造周期Jacobi矩阵反问题解的数值算法，并与前人的算法做了一定比较；由于周期Jacobi矩阵特征值反问题和其他很多特征值反问题一样往往存在多个解，本论文给出了周期Jacobi矩阵反问题解唯一的充要条件，并发现周期Jacobi矩阵特征值反问题的解唯一当且仅当构造的矩阵满足一定的条件；在解唯一的情况下，给出了构造唯一解的数值算法，并做了相应的稳定性分析；最后，提出了一类新的有待于解决的周期Jacobi矩阵特征值反问题。

The machine component claimed in claim 1, in which the second mounting means comprises a toggle bracket fixed with respect to the base plate, a toggle lever located above the slide plate and pivotally mounted to said toggle bracket about afirst axis, the toggle bracket having a plurality of attachment openings at different spacings from said first axis, a clevis bracket affixed to the slide plate, a toggle link pivotally mounted at one end to said clevis bracket and pivotally mounted atthe other end to said toggle bracket at one of said plurality of openings, constituting a second axis spaced from said first axis, one part of said assembly being pivotally mounted to said toggle bracket at a third axis spaced from said first axis,whereby the spacing of the second axis from the first axis can be adjusted by selecting a different opening, and whereby the second and third axes are spaced at different distances from said first axis.

机器组件索赔要求1，其中第二次安装的手段包括一个切换支架方面的底板，上面一个切换杠杆的滑板位于pivotally安装固定谈及afirst轴切换括号，括号有一个切换扣押开口多元化，从不同间距表示，第一轴，一个羊角支架贴在滑板，一个切换链接pivotally在一端说，羊角安装支架和pivotally安装atthe的另一端说，在一个多元切换支架开口说，构成间隔从第二轴表示，第一轴，其中的一部分被pivotally说集会上说安装在从间隔三分之一轴切换括号表示，第一轴，即从第一轴，第二轴间距可以通过选择一调整不同的开放，即第二和第三轴是从不同的距离间隔表示，第一轴。

The main results are:(1) the L1 boundedness of the Cesaro means operator of the harmonic expansions on the unit sphere with reflection-invariant measures is proved, and the characterization of the convergence index is given; for the points not in the planes with singularities, the pointwise convergence is also proved; these results are the generalizations of those both for the classical spherical harmonic expansions and for the Jacobi expansions;(2) Using the differential-reflection operators of Dunkl type, the uncertainty principle of a class of Sturm-Liouville operators is established, and as consequences, the uncertainty principles of some well-known classical orthogonal expansions such as Jacobi, Hermite and Laguerre expansions are obtained;(3) by introducing the Cauchy-Riemann equations in terms of the differential-reflection operators of two variables, the harmonic analysis of the extended Jacobi expansions is studied; the results include the Lp boundedness and the weak-L1 boundedness of the conjugate extended Jacobi expansions; specially, for some indexes p smaller than 1, the basic theory of the related Hardy spaces is established.

主要成果有：（1）证明了带有反射不变测度的球面调和展开蔡沙罗平均算子的L1有界性，给出了收敛指标的特征刻划，对不在奇性平面上的点，还证明了点态收敛性，这些成果同时推广了经典球面调和展开和雅可比展开的结果；（2）利用Dunkl型的微分-反射算子建立了一类斯特姆-刘威尔算子的测不准原理，并由此得到一些著名的经典正交展开如雅克比展开、赫米特展开和拉盖尔展开的测不准原理；（3）利用由两个变量的微分-反射算子定义的柯西-黎曼方程组来研究扩展雅克比展开的调和分析，证明了共轭扩展雅克比展开的Lp有界性和弱L1有界性，特别是对小于1的一些指标p，建立了相应的哈代空间的基本理论。

A motor shaft is arranged in the middle of a motor; the motor shaft is connected with the lower bracket by a connecting plate; the upper bracket is provided with a plurality of radiating holes; a flange of the lower bracket is formed at the external edge of the lower bracket and an axial hole is formed in the middle of the lower bracket.

本发明公开了一种吸尘器电机支架结构，包括上支架和下支架，在电机的中间设有电机轴，电机轴通过连接板与下支架连接，在上支架上形成多个散热孔，在下支架的外缘形成下支架凸缘，在下支架的中间形成轴孔。

The machine component claimed in claim 1, in which the second mounting means comprises a toggle bracket fixed with respect to the base plate, a toggle lever located above the slide plate and pivotally mounted to said toggle bracket about afirst axis, a clevis bracket affixed to the slide plate, a toggle link pivotally mounted at one end to said clevis bracket and pivotally mounted at the other end to said toggle lever at a second axis spaced from said first axis, one part of said assemblybeing pivotally mounted to said toggle lever at a third axis spaced from said first axis, the second and third axes being spaced different distances from said first axis.

机器组件索赔要求1，其中第二次安装的手段包括一个切换支架方面的底板，上面一个切换杠杆的滑板位于pivotally说，安装在固定支架切换对afirst轴，一羊角支架贴幻灯片板，一个切换链接pivotally在一端的安装支架，并说，羊角pivotally在另一端安装说，从第二个间隔轴切换杆称，第一轴，其中的一部分说assemblybeing pivotally安装在切换上说杠杆间隔从第三轴轴表示，第一，第二和第三轴间距是从不同的距离表示，第一轴。

In the second part, we gave several basic and essential knowledge of inverse eigenvalue problems for Jacobi matrices: such as the properties of tridiagonal matrices, Jacobi matrices, orthogonal polynomials, Gauss quadrature formula and inverse eigenvalue problem for Jacobi matrices.

第二部分介绍了求解Jacobi矩阵反问题的基础：三对角矩阵和Jacobi矩阵，正交多项式，高斯积分方法的性质和Jacobi矩阵特征值反问题。

When the coefficient matrice is index p cycle matrice (p = 3,4,5),we educe the relation between preconditionging Jacobi 、 GS iterative matrices" and classical Jacobi iterative matrices" eigenvalue; As an application, make some preconditioning iterative factors, when classical Jacobi iterative converge, the preconditioning iterative methods may converge faster.

2系数矩阵是指数p=3，4，5循环矩阵时，分别给出了预条件Jacobi、Gauss-Seidel迭代矩阵与传统块Jacobi迭代矩阵二者特征值之间的关系，作为一个应用，通过预条件因子的特殊取值，使传统Jacobi迭代收敛时，预条件块迭代法的收敛速度成倍提高。

The axis guide bracket installment arriving, is tight with the pre-wrap in the lead screw drive pipe with the bolt, attention axis guide bracket tube and lead screw concentric, should be bigger than the strobe caliber especially a foot axis guide bracket to the damper plate handbasket distance.

将轴导架安装到位，与预套在丝杆的套管用螺栓紧固，注意轴导架管与丝杆同心，尤其最下部一个轴导架到闸板提篮的距离应大于闸门口径。

The article is used finite yuan the method builds his to emulate analytic model, the construction of imitate bridge, study successive bridge bracket is irrigated build construction each operating mode, analyse what each operating mode issues bracket to be out of shape reach stability, ordinal come the design of bracket of test and verify is reliable, provide reference for bridge construction.

文章利用有限元方法建立其仿真分析模型，模拟桥梁的施工，探究连续梁支架浇筑施工各工况，分析各工况下支架的变形及稳定性，依次来验证支架的设计是否合理可靠，为桥梁施工提供参考。

Ningbo Johson Industry Co., Ltd., founded in 2000, Our company is a professional manufacturer producing the products of sound and audiovis-ual, the products include speaker wall bracket, TV bracket, LCD bracket, and so on.

宁波johson业有限公司，成立于2000年，我们公司是一家专业生产，生产的产品和完善的audiovis - ual ，这些产品包括议长壁支架，电视支架，液晶支架上，等等。

He got into race cars, while my father liked go-karts more, so I didn't really pay attention to what Diego was doing, as I was just racing karts.

叔叔开的是跑车，而我父亲更喜欢越野卡丁车，所以我并不太关注Diego在做什么，我仅仅在跑我的卡丁车而已。

She is at present gone to look for the best nectar and ambrosia to regale me this evening.

她今晚为款待我，现在又去准备美酒佳肴去了。