Uniqueness and Stability of Solution for Semi-liner Heat-conduction Equationin Higher Dimension

This paper deals with the uniqueness of solution to a class of semi-linear heat-conduction equation in higher dimension on the basis of references [1] and [2]. The main results in this paper are as follows: the solution of problem (A) is unique and stable if it exists.     

带梯度项半线性热方程解的耗竭

给出带梯度项半线性热方程第一初边值问题解在有限时间内耗竭的充分条件．     

Existence of Solutions for Nonlinear Implicit Complementarity Problems in Reflexive Banach Spaces

51.IntroductionNonlinearcomp1ementaritytheoryhasemergedasaninterestingandfascinatingbranchofapplicablemathematics.Thistheoryhasbecomearichsourceofinspirationandmotivationforscientistsandengineerstoalargenumberofproblemsarisingincontactproblemsinelasticity,fluidflowthroughporousmedia,generalequilibriumoftransportationandeconomics,optimiza-tionandcontrolproblems,etc.IthasbeenshownbyKaramardian[8jthatiftheconvexsetin-volvedinavariationalinequalityproblemandacomplmentarityproblemisaconvexcone,then…     

负指数的脉冲EMDEN-FOWLER方程奇异边值问题的正解

利用不动点定理得到了脉冲奇异混合边值问题的上下解方法,并且利用此方法得到了负指数的脉冲Emden-Fowler方程奇异混合边值问题正解存在的充分必要条件.     

广州东区成人下呼吸道感染细菌的耐药性分析

收集１９９０年１０月－１９９４年５月期间我院成人下呼吸道感染患者痰液、培养分离出７３６株致病菌。其中球菌３５３株、革兰氏阴性杆菌３８３析，最常风假单胞菌属１７６株、金黄色葡萄球菌及链球菌。按Ｋｉｒｂｙ－Ｂａｕｅｒ＇ｓ法药物敏感性测定结果显示：１）球菌对青霉素，氨苄青霉素普遍耐药（３８．２％－１００．０％）；２）金黄色葡萄球菌对抗生素的耐药性最严重（除对氯霉素外）４１．２％－８１．３％；３）近二年来     

Lagrangian Approach to Quasiconvex Programing

For a mathematical programming problem, we consider a Lagrangian approach inspired by quasiconvex duality, but as close as possible to the usual convex Lagrangian. We focus our attention on the set of multipliers and we look for their interpretation as generalized derivatives of the performance function associated with a simple perturbation of the given problem. We do not use quasiconvex dualities, but simple direct arguments.     

On Monotone Method for Second Order Periodic Boundary Value Problems and Periodic Solutions of Functional Difference Equations

In this paper, we show that the method of monotone iterative technique is valid to obtain two monotone sequences that converge uniformly to extremal solutions to second order periodic boundary value problems and periodic solutions of functional difference equations. We obtain some new results under the lower solution a and upper solution βwith α≤β.     

关于(a,a,b)类型的三维除数问题

本文研究了(a,a,b)类型的三维除数问题.当a＜b≤2a时,我们利用指数和的新估计得到了余项△(a,a,b;x)的较好估计.     

钾促进型Co-Mo系耐硫变换催化剂性能研究

 采用常压微反色谱评价装置，TPR，XRD和SEM等技术，考察了钾对Co－Mo系耐硫变换催化剂活性及抗水合性能的影响．结果表明：在原料气中H2S含量大于0．05％的条件下，钾的加入量存在一个最佳范围；在原料气中H2S含量小于0．05％的条件下，增加催化剂中的钾含量，可以提高催化剂“捕硫”的能力，从而能提高催化剂耐“低硫”的能力．在高于露点温度18～20℃的苛刻条件下，钾的加入能促进γ－Al2O3载体与水蒸气的水合反应，使催化剂的抗水合性变差．还探讨了催化剂发生水合反应后对其活性的影响．结果表明，γ－Al2O3载体发生水合相变后能引起催化剂活性大幅度下降，而钾的加入加剧了催化剂发生水合反应的程度，导致其催化活性进一步下降．     

单片冲压式汽车下控制臂轻量化优化设计

以某国产车型的焊接型下控制臂为结构轻量化设计对象,综合运用多种优化方法,设计出一款全新的单片冲压型下控制臂.该单片冲压型下控制臂在满足原焊接型下控制臂所需的各项性能的基础上,较原控制臂质量减轻33.3%,轻量化效果显著.