查询词典 existence conditions

Based on a 5th-order model and the electromagnetic characteristics of an induction motor, we prove that the coefficient matrix is nonsingular, confirming the existence of the inverse decoupling control of stator flux and torque in any conditions.

本文从异步电动机的5阶模型及其固有的电磁特性出发，证明了其系数矩阵的非奇异性，进而结合逆系统理论证明定子磁链与电磁转矩的逆解耦在任何状态下都是存在的。

By using the continuation theorem of topology degree theory and properties of nonsingular M-matrix, we obtain sufficient conditions for the existence of positive periodic solutions of this system.

利用拓扑度理论中的连续定理以及M-矩阵的性质获得了该系统正周期解存在的充分条件。

After discussing the structural conditions of the existence of the active network solutions, the state equations in normal form over F of electrical network which are suited for studying the character of network structure are derived. If there is no loop containing only capacitor and independent voltage sources, and if there is no cut-set containing only inductors and independent current-sources, both matrix A and B in ?

在探讨了有源网络解存在的结构条件下，推导了适合研究网络结构特征的多元有理函数域上电网络的范式状态方程：如果不存在仅由独立电压源和电容器构成的回路，且不存在仅由独立电流源和电感器组成的割集，则无论是有源网络还是无源网络，在网络的范式状态方程？

In the first chapter, the one - to - one correspondence between mild solutions of an abstract deday equation and mild solutions of an associated abstract Cauchy problem is shown, and necessary and sufficient conditions for existence and uniqueness of mild solutions of the abstract delay equation are obtained.

全文共为三章，在第一章中，说明了抽象时滞方程的mild解与相应的抽象柯西问题的mild解一一对应，并且得到了抽象时滞方程的mild解存在唯一的充要条件。

First, the existence of Ce〓 in samples has no direct relation to the positive Ce anomalies; Second, the adsorption of Ce on iron and manganeses oxides possibly concerning the Ce〓 oxidate to Ce〓. However, further research is necessary for the oxidative mechanism and conditions of Ce〓 to Ce〓.

首先，剖面样品中Ce〓的存在不一定表明该样品具有正的Ce异常；其次，铁锰氧化物对Ce的吸附极有可能伴随着氧化作用，但具体的氧化机制和条件还需要进一步的研究。

In chapter 4, in the frame of partially ordered F-type topological space, we research the existence of the solution of a nonlinear operator equation Lx = Nx, and the convergence of the iterative sequence {u_n} which satisfies Lu_(n+1)= Nu_n for a solution of the equation. Then, we give the conditions for multiplicity of the solutions of this operator equation.

第四章，在半序F-型拓扑空间框架下研究一类非线性算子方程Lx=Nx解的存在性，以及满足Lu_(n+1)=Nu_n的迭代序列{u_n}对于方程解的收敛性，并给出这类算子方程具有多解性的条件。

By using the method of coincidence degree, a set of easily verifiable sufficient conditions are established for the existence of positive periodic solution of this system.

利用重合度理论的延拓定理讨论了此系统周期解的存在性问题，得到了保证周期解存在的充分条件。

The grazing bifurcation point is found in terms of the conditions for the existence of grazing orbit.The bifurcation diagrams are gained through previous piecewise smooth map and numerical calculation,they are similar structurally.

利用擦边分岔条件找到了此系统的擦边分岔点，利用推导的擦边分岔的分段映射和直接数值仿真获得不连续分岔图，两者得到的分岔图在结构上是类似的。

According to the plane cross section assumption, configuration of a rod is expressed as a history of the cross section with arc coordinate. A special solution which stands for equilibrium in straight line state is obtained from differential equilibrium equation. Linear perturbation equation is derived and its general solution is obtained in which the integral constants are determined by constrained conditions at two ends of the rod. The condition of existence of non zero solution of the integral constants gives to the Greenhill formula of exact elastic rod model, which shows that the boundary of stable area is a closed curve and of symmetry, and inference of shearable and extensible to stability of the rod is depend on three factors: difference between flexibility of shear and extension of a section of the rod, bending stiffness and the length of the rod.

基于平面截面假定，弹性杆的位形表达为截面的弧坐标历程，根据平衡微分方程得到了两端受力螺旋作用时的直线平衡特解，导出了线性化扰动方程及其通解，积分常数根据两端铰支时的边界条件确定，并根据其存在非零解的条件得到弹性直杆精确模型的Greenhill公式，表明稳定域为一对称的封闭区域，拉/压和剪切对稳定性的影响取决于：拉/压柔度与剪切柔度之差，抗弯刚度和杆长这三个因素

Under some proper conditions we prove the existence of optimal controls in the class of Lipschitz functions, and obtain an optimality condition looks somehow like Pontryagin's maximum principle for a smooth optimal control function.

在适当的假设条件下，我们证明了状态方程解的存在唯一性和最优控制的存在性；并且根据最有控制函数的光滑性进一步对最优化存在的必要条件进行分析。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。