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It consists of the next three aspects: firstly, we study Murthys' open problem whether the augmented matrix is a Q0-matrix for an arbitary square matrix A , provide an affirmable answer to this problem , obtain the augmented matrix of a sufficient matrix is a sufficient matrix and prove the Graves algorithm can be used to solve linear complementarity problem with bisymmetry Po-matrices; Secondly, we study Murthys' conjecture about positive semidefinite matrices and provide some sufficient conditions such that a matrix is a positive semidefinite matrix, we also study Pang's conjecture , obtain two conditions when R0-matrices and Q-matrices are equivelent and some properties about E0 ∩ Q-matrices; Lastly, we give a counterexample to prove Danao's conjecture that if A is a Po-matrix, A ∈ E' A ∈ P1* is false, point out some mistakes of Murthys in [20] , obtain when n = 2 or 3, A ∈ E' A ∈ P1*, i.e.

本文分为三个部分,主要研究了线性互补问题的几个相关的公开问题以及猜想:(1)研究了Murthy等在[2]中提出的公开问题,即对任意的矩阵A,其扩充矩阵是否为Q_0-矩阵,给出了肯定的回答,得到充分矩阵的扩充矩阵是充分矩阵,并讨论了Graves算法,证明了若A是双对称的P_0-矩阵时,LCP可由Graves算法给出;(2)研究了Murthy等在[6]中提出关于半正定矩阵的猜想,给出了半正定矩阵的一些充分条件,并研究了Pang~-猜想,得到了只R_0-矩阵与Q-矩阵的二个等价条件,以及E_0∩Q-矩阵的一些性质;(3)研究了Danao在[25]中提出的Danao猜想,即,若A为P_0-矩阵,则,我们给出了反例证明了此猜想当n≥4时不成立,指出了Murthy等在[20]中的一些错误,得到n=2,3时,即[25]中定理3.2中A∈P_0的条件可以去掉。

The product rule and chain rule, the notion of higher derivatives, Taylor series, and analytical were introduced by Isaac Newton in an idiosyncratic notation which he used to solve problems of mathematical physics .

该产品的规则和链的规则,概念,更高的衍生物,泰勒级数,并分析介绍了牛顿的特殊符号,他用来解决问题的数学物理。在他的出版物,牛顿改写他的想法,以适应数学习语的时间,取代的计算几何无穷小的等价论点被认为是无可指责的。

At the same time , we discuss the determinism and nondeterminism of formula-clock automata and the closure propertied under Boolean operation of the language which is accepted by formula-clock automata. We also prove the expressive equivalence between the deterministic formula-clock automata and the nondeterministic formula-clock automata. This means that every nondeterministic formula-clock automata can be transformed to a deterministic formula-clock automata which exactly accept the timed language identified by the fomer.We also extend timed words to infiniteness and define the formula-clock Buchi automata and the formula-clock Muller automata. At last, we show its application in formal verification and modeling of real-time system.

然后讨论了公式时钟自动机的确定性和非确定性,公式时钟自动机识别的语言类在并、交、补运算下的封闭性;并证明了确定的公式时钟自动机和非确定的公式时钟自动机表达能力的等价性,这意味这每一个非确定的公式时钟自动机都能转换为一个与之识别相同时间语言的确定的公式时钟自动机;我们将时间字扩展为无穷的,从而定义了公式时钟Buchi自动机与公式时钟Muller自动机;最后给出了用它进行实时系统的形式化验证方面及对实时系统建模的应用。

In this paper, we construct the differential equation to solve the unconstrained optimization problem. Such methods solving the ill-conditioned problems are very effective. It indicates that the asymptotically stable region of explicit the Euler method to solve the differential equation equals to the descent region of the gradient method to solve the original unconstrained optimization problem.

我们发现,在用Euler方法求解二次优化问题的等价动力系统的方程时,由方法的步长确定的稳定区域对应于这些方法所得到的迭代公式的步长满足单调下降算法的条件确定的单调下降区域,因此我们可以利用这个性质构造解无约束优化问题的数值方法而不采用标准的常微分方程的数值求解公式。

Theorem 2.1.4 The following statements are equivalent for a ring R:(1) R is left co-semihereditary;(2) every finitely cogenerated factor module of a finitely cogenerated injective R-module is quasi-injective;(3) every finitely cogenerated factor module of a finitely cogenerated injective R-module is direct-injective.

an环 R下列叙述等价: l)R的每个商环是强左余半遗传的; 2)R的每个商环是左余半遗传的; 3)拟内射R模的每个有限余生成商模是拟内射的; 4)有限余生成拟内射R-模的每个有限余生成商是直内射的; 5)有限余生成fi-(来源:A3fBC论文网www.abclunwen.com)拟内射R-模的有限余生成商模是拟内射的。

Via basic and descriptor adverse transformation of matrix, an equivalent standard linear system is derived. Sufficient and necessary conditions are established for observers with disturbance decoupling and LTR in systems. Analysis showed that the necessary and sufficient condition for observers with LTR is disturbance decoupling to any undnown inputs. So it is con verted to the problem that observers are designed with disturbance decoupling.

通过矩阵的初等变换和广义逆变换,将非方广义系统等价地转化为正常状态空间的广义线性系统,并运用有关定理给出观测器具有干扰解耦和环路复现特性的充要条件,经分析可知,系统具有环路复现特性的充要条件是系统对于任何未知输入干扰解耦,则具有环路复现特性的干扰解耦观测器的设计问题转化为系统关于任何扰动都是解耦的。

However,there have been no papers which have investigated Minkowski and Minkowski slant helices and Minkowski conical geodesic curves so far as.In this paper,our major study is to give the definition of Minkowski general helix and Minkowski slant helices and Minkowski conical geodesic curves in indicators 1 in pseudo-Euclidean three-space (that is, three-dimensional Minkowski space), and study the definition of equivalence Minkowski general helix, By considering geometric invariants of these space curves, we can estimate the order of contact with those special curves for general space curves.

本篇文章主要研究在指标数为1的3维伪欧氏空间(即三维Minkowski空间)中,我们给出Minkowski一般螺线、Minkowski斜螺线和Minkowski锥面测地线的定义,研究Minkowski一般螺线的等价定义,给出Minkowski斜螺线和Minkowski锥面测地线作为三维Minkowski空间中的特殊曲线所特有的性质,并通过考虑三维Minkowski空间曲线的几何不变量,估计Minkowski斜螺线和Minkowski锥面测地线这两种特殊曲线和一般Minkowski空间曲线切触的阶数。

Two complete congruences on the congruence lattices of regular semigroups with Q-inverse transversal s are analysed.

研究了具有Q-逆断面的正则半群上的同余格Con上的等价关系W和Q,它们都是Con上的完全同余,这些完全同余的每一个类是区间,给出了每一个类的极大、极小同余的表示。

The central issue of rough sets theory is to classify analysing , a limitation of Pawlak rough sets model is that the classification which it deals with must be totally correct or definite,Because it classified according to the equivalences strictly,so its classification is accurate, namely " include " or not" include ", but the one that does not have to a certain extent" includes " or " belongs to ".

粗糙集理论的中心问题是分类分析,Pawlak粗糙集模型的一个局限性是它所处理的分类必须是完全正确的或肯定的,因为它是严格按照等价类来分类的,因而它的分类是精确的,亦即&包含&或&不包含&,而没有某种程度上的&包含&或&属于&。

According to density of particle numbers and energy of perfect quantum gas ,by strict theoretical calculation ,the energy of non relativity and relativity about perfect quantum gas under high temperature and low density is given.

根据理想量子气体的粒子数和能量的密度,通过严格的理论推算,给出理想量子气体在高温低密度条件下非相对论和极端相对论能量;再由巨正则系综中能量和压强相对涨落的公式,采用合理的近似方法,给出巨正则系综能量和压强相对涨落的严格解,并将其与正则系综对比,完备地展示两种系综在强度量的涨落方面热力学的等价性和个性差

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。