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In the second chapter, the concept of an integrated abstract delay equation is introduced, and the equivalence of the well - posedness of an integrated delay equation and an associated integrated Cauchy problem is derived.

在第二章中,引入了积分抽象时滞方程的概念,并且得到积分抽象时滞方程的适定性与相应的积分柯西问题适定性等价。

The equation of relative motion of the liquid in a TLCGD can be derived using the extended non-stationary Bernoulli's equation and equivalently linearized.

由广义Bernoulli方程推导出液体在管道中的运动方程并等价线性化。

The equivalence of canonical equation and Heisenbergs Equation to harmonic oscillator systems are verified.

从而验证了海森伯方程和哈密顿正则方程对谐振子系统的等价性。

The basic idea of Tikhonov regularization is that linear compact operator equation of the first kind is replaced by the minimization problem of Tikhonov functional, the paper demonstrates the minimization of Tikhonov functional is an well-posed problem. In the end, the paper suggests a new type of iterative algorithm to solve inverse problems of parameter identification for one-dimension parabolic partial differential equation .

本文论证了Tikhonov泛函极小化问题是适定的,即满足西安理工大学硕士学位论文解的存在性、解的唯一性和解连续依赖于数据的稳定性:并且此极小化问题等价丁求解第一类方程的正规方程。

The motion of a discrete curve in Minkowski space is first introduced. Then by identifying the spin vector of HF models with the unit vectors of discrete curve, respectively, we obtain the corresponding DNLS.

我们将主要考虑闵可夫斯基空间中离散曲线的运动情况,并利用离散曲线的单位矢量分别替代离散的MHF方程中的自旋矢量,给出相应的离散非线性薛定谔方程,从而建立了两者之间的几何等价性。

The solvability can not be sidestepped, for it relates the problem of equivalence of boundary reduction.

人们在用直接边界元方法进行计算时,并不刻意去考虑积分方程的可解性,但可解性的问题是不能回避的,这涉及到原问题的解与边界积分方程的解的等价性问题。

Adopting generalized Jordan block and algebra equivalence transform method, all of the transfer functions at different load points can be transformed to state-space description with time variable. The steady robustness of three different mode of control systems were researched by mathematic analysis. It shows that: for the high order inertia controlled object with the characteristic of nonlinear and time-variable that described by the set of transfer functions, the Luenberger function observer established according to its any algebra equivalence state-space description, if some conditions can be met, there would be a matrix of T with n′n satisfied the Sylvester matrix equation TA- FT=GC.

采用广义约当块及代数等价变换方法,可将分段的传递函数描述转换为变参数的状态空间描述,对3种典型控制系统的稳定鲁棒性所进行的理论研究表明,对同一组传递函数描述的具有非线性和时变特性的高阶惯性受控对象,依据其任一代数等价的状态空间描述所构建的Luenberger函数观测器,在满足一定的条件时,存在n′n解阵T满足Sylvester矩阵方程TA- FT=GC。

Secondly, for a more general matrix equation in composition, we obtain another equivalent condition for the solvability of this equation and give an equivalent characterization to the solution set of the equation.

第二, 对于一般情况下的型矩阵方程,本文给出其可解的另一个等价条件,同时对其解集作了一个等价性描述。

Operations are given and testified in this paper. The research methods of intrinsical linear nonholonomic dynamics are similar to those of holonomic dynamics.The rationality and equivalence of Chetaev model and Vacco model in the intrinsical linear nonholonomic system are testified from the mathematic and mechanical aspects. The essential reason is the nonlinear property of intrinsical nonlinear nonholonomic constrain that bring on Chetaev model and Vacco model inequivalent. Chetaev model is a linear approximate method in intrinsical nonlinear nonholonomic system. Vacco dynamical equations are not satisfied to the ideal constraint force conditions, but it gives a significative ponderation on the realizations of intrinsical nonlinear nonholonomic constrain.

本文比较研究了一般非完整系统的Chetaev模型和Vacco模型,首次从力学和数学的角度论证了这两种模型在完整系统和本质线性非完整系统中的合理性和等价性;同时给出了在本质非线性非完整系统中,Chetaev模型和Vacco模型不等价的根本原因,是由本质非线性非完整约束的不确定性非线性本质所导致的;指出在本质非线性非完整系统中,Chetaev模型是一种线性近似的结果,Vacco动力学方程虽然不满足约束力的理想性质,但是为我们研究本质非线性非完整约束的物理实现提供了有益的思考。

We can lead out the equivalent border integral equation by Green the second equation,dividing the inner border in the liquid into a series strip of awls shell or cylindrical shell ,and solve border integral equation along different segment of border, then lead out border integral equation.

由Green第二恒等式导出等价的边界积分方程,将液体内边界分成一系列锥壳或柱壳状条,对边界积分方程进行分段积分,导出边界元格式方程。

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

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