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 共查询到19条相似文献,搜索用时 78 毫秒
1.
ABilevelDecisionMethodfortheMultiobjectiveProblemwith01VariablesShenHoucai(沈厚才)ZhongWeijun(仲伟俊)XuNanrong(徐南荣)(SchoolofEcono...  相似文献   

2.
Earthquake Analysis for the System of RC Building with a Steel Tower   总被引:1,自引:0,他引:1  
The damping ratios of RC buildings and steel tower are 0. 05 and 0. 01 respectively, so a steel tower topping an RC building comprises a non-proportional damping system[1,2]. Due to the difficulty of dynamic analysis for non-proportional damping systems[3-5] , these systems are usually simplified as proportional damping ones with equivalent damping ratio. The equivalent damping ratio takes a value more than 0.01 and less than 0. 05. To compare the results calculated using the non- proportion…  相似文献   

3.
On Wyner-Ziv Problem for general sources with average distortion criterion   总被引:2,自引:0,他引:2  
The Wyner-Ziv Problem for general sources with average distortion under fixed-length coding is investigated in this paper. To solve the problem,an enhanced covering lemma for a Markov chain is first established. Then based on the lemma,a general formula for the rate-distortion function of the problem is derived,where the distortion is only assumed uniformly bounded and may be nonadditive. Finally,it is further pointed out that such methods can be used to establish more general results on multiterminal source coding problems.  相似文献   

4.
The nonlinear Riemann problems were converted into nonlinear singular integral equations and the existence of the solution for the problem was proved by means of contract principle.  相似文献   

5.
1 Introduction Manyproblemsinmechanicsandmechanicalengineeringmaybeformulatedintoboundaryvalueproblemsforfirstorsecondorderellipticsystems,whichwerestudiedbylotsofscholars(seeRefs.[1-9]).InthispaperwediscussthenonlinearRiemannproblemfornonlinearellipticsystemsintheSobolevspaceW1,p(D).2 StatementoftheProblem LetD+beadomainwithasmoothboundaryγ,andΓbeanothersmoothboundarycontainingD+andγinitsinteriorinthecomplexzplane.D-isthedomainclosedbyΓandoutsideγ.DenoteD=D++D-. ProblemR Fin…  相似文献   

6.
Born in what is now known as Shantung Province's Tsou hsien, Mencius (c. 390-305 B.C.), whose family name was Meng and his name K'o, was a student of a disciple of Tzu Ssu who was Confucius' grandson. Mencius was a trumpeter for restoring the slave system and was long revered by the reactionary ruling classes as the "No. 2 sage," second only to Confucius, because he had inherited and made contributions in developing the reactionary theories of the Confucian school. The so-called "policy of benevolence," which was incisively criticized by Chairman Mao in On the People's Democratic Dictatorship, was a reactionary slogan which Mencius had done his utmost to advertise in his effort to restore the slave system. By criticizing his reactionary words and deeds and. analyzing the class content of his political line, we can better understand how the overthrown reactionary classes worked overtime to revive the old system and how they viciously attacked the new system. Through such criticism and analysis, we can also gain a deeper understanding of the class struggle under the dictatorship of the proletariat and see clearly the counterrevolutionary nature of Lin Piao and other political swindlers.  相似文献   

7.
1 Introduction Colorharmonyisanimportantwaynotonlyinachievingaestheticmeasureofcolorcompositions ,butalsoincreatingmessagecontextforcolorcompositionpurposes.Themoderncolorharmonytheorydealswithcolordesignproblemsinindustrialproductswithquantitativeandrationalengineeringmethods ,whichisnecessaryintothedevelopmentofproductivity .Thestudyofcolorharmonyaestheticmeasureisnotonlyapsychologicalsubjectbutalsoanengineeringsubject.Withthedevelopmentofproductivity ,therequirementofproductdesigngoesbeyo…  相似文献   

8.
By using a smoothing function,the P nonlinear complementarity problem(P NCP)can be reformulated as a parameterized smooth equation.A Newton method is proposed to solve this equation.The iteration sequence generated by the proposed algorithm is bounded and this algorithm is proved to be globally convergent under an assumption that the P NCP has a nonempty solution set.This assumption is weaker than the ones used in most existing smoothing algorithms.In particular,the solution obtained by the proposed algorithm is shown to be a maximally complementary solution of the P NCP without any additional assumption.  相似文献   

9.
Cognitive load theory has challenged contemporary approaches to teaching by arguing that they are ineffective because of a neglect of the psychology underpinning learning and, specifically, the high demand placed on working memory. This paper challenges the presuppositions involved not only in arguments for guided instruction by those supporting cognitive load theory, but also in opposed pedagogic approaches involving discovery and inquiry learning. Both approaches are in danger of presupposing what C.B. Macpherson criticised as ‘possessive individualism’—i.e. capacities, beliefs and desires viewed as possessions of an individual. As a result, they fail to pay attention to mediation and normativity, both of which are distinctive aspects of human action. Examining this in more detail entails consideration of fundamental issues concerning human knowledge and understanding. An appreciation of the significance of normativity and mediation leads us to the philosophic works of Marx, Vygotsky and Wittgenstein, and in particular to Brandom's Inferentialism. The philosophical ideas here have direct implications for pedagogy.  相似文献   

10.
An overview is given of the course of development and the social role of higher education in Romania since the revolution of December 1989. The pros and cons of private higher education institutions are presented with the added note that the existence of these institutions saves money for the Romanian state and subsidizes the salaries of professors teaching in the state institutions. Suggestions are made as to how to improve the teaching/learning environment both for students and for teachers, and a plea is made that higher education in Romania, both public and private, avoid becoming overly market‐oriented. Rather, higher education should contribute to the remaking of civil society.

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11.
Nonlinear boundary problem for a class of the first order elliptic partial differential system with the general form are studied in this paper. And the equivalent nonlinear singular integral equations are established. Then the existence theorem of solution of the problem are also obtained. Project supported by the National Natural Science Foundation of China (19671056)  相似文献   

12.
The nonlinear Riemann problems were converted into nonlinear singular integral equations and the existence of the solution for the problem was proved by means of contract principle.  相似文献   

13.
本文利用Leray-Schauder连续定理获得一类二阶常微分方程三点非线性边值问题解的存在结果。  相似文献   

14.
研究一类四阶非线性波动方程的初边值问题:{utt-Δu-Δut-Δutt=μ|u|p-1u f(x,t),u|(e)Ω×(0,t)=0,u(x,0)=u0(x),ut(x,0)=u1(x);(1)得到了其广义解的存在性.  相似文献   

15.
利用关于锥拉伸锥压缩的Krasnoselskii不动点定理讨论了非线性奇异三阶两点边值问题u(t) λa(t)f(u(t))=0,0相似文献   

16.
本文考虑一个非线性周期边值问题的解的存在性,利用迭合度中的Mawhin延拓定理证明该问题解的存在性。  相似文献   

17.
应用锥压缩与锥拉伸不动点定理,证明了n 1阶两点非线性微分方程-u~(n 1)(t)=f(t,u(t)),0<t<1,u(0)=u(0)=L=u~(n 1)(0)=u(1)=0的正解的存在性.  相似文献   

18.
利用相应线性化问题及全局反函数定理的方法,得到非线性周期边值问题解的存在唯一的几个结果,将条件减弱到渐近非一致条件。  相似文献   

19.
研究了一阶线性椭圆型偏微分方程组的边界条件中含有二阶偏导数的R-DR-D^2R-H-DH-D^2H复合边值问题,利用消去法将其化为等价的广义解析向量的Hilbert边值问题,并利用奇异积分方程组的理论给出了问题的可解性条件.  相似文献   

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