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分析了具有混沌动力学特征的非线性三阶自治电路，给出了混沌电路中非线性电阻的构造方法，通过EWB软件对混沌电路进行了计算机仿真，实际硬件电路板测试得到混沌吸引子、倍周期分岔、周期性窗口等预期分析结果，此结果对深入研究混沌理论及混沌的同步和控制有积极借鉴作用。 相似文献
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混沌学的辩证思想 总被引：1，自引：0，他引：1
苗东升 《内蒙古大学学报(人文社会科学版)》1994,(4)
混沌学是非线系统理论最热门的前沿课题之一，在哲学上也很引人入胜。最早对混沌进行哲学考察的人，是混沌学的开创者们，如彭加勒、洛仑兹、茹勒、福特、费根鲍姆等。郝柏林撰写了中国的刊物上见到的第一篇混沌哲学论文。苗东升、刘华杰的专著《混沌学纵横沦》，从不同角度考察了混沌。本文在２一４部分中写到的如，动力学向辩证思维复归，说明简单有序运动不是现实世界的普遍存在，混沌运动才是通有行为，中外学者十分重视中国古代混沌观，在新水平上发展了混沌学，混沌是有序与无序都很强烈时形成的运动体制；奇怪吸引子的吸引和排斥不相上下时，造就出一种整体稳定局部不稳定的运动体制，即混沌：混沌的复杂性来源于它包含多种多样的对立统一，通过确定性与不确定性、周期性与非周期性的具体分析，说明刻划混沌概念需要辩证逻辑，而形式逻辑强调概念的固定化、绝对化，显然不够用。 相似文献
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概述了混沌现象以及混沌研究的意义，探讨了通向混沌的道路和混沌在工程方面的应用，并展望了它们的发展前景。 相似文献
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本文介绍了混沌现象及通过两个经典的混沌实例，用两种不同的方法展示混沌行为．从而让学生对混沌现象有一个直观的了解。 相似文献
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基于Matlab研究了离散混沌系统的数值解法和图形仿真，同时针对离散时滞混沌系统给出了数值仿真的Matlab程序．对于高阶离散混沌系统也可以采用上面的变换将系统降阶，变成一阶差分方程组进行求解，从而离散混沌系统都可以通过简单的编程实现数值仿真．从数值仿真角度来说，所得方法对于离散混沌系统的混沌同步和控制器仿真及误差描述都有积极的意义． 相似文献
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教学系统的混沌性与课堂教学设计 总被引：1，自引：0，他引：1
教学系统的混沌性与课堂教学设计浙江省常山县教育委员会黄津成教学系统是一个动态的、开放的系统，这一观点早已成为人们的共识。但如果站在混沌科学的立场上，用混沌的观点来审视教学系统，从更确切的意义上来讲，教学系统是一个混沌系统。既然教学系统是一个混沌系统，... 相似文献
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介绍了企业系统的复杂性，企业家激励系统的混沌特性，然后建立了简单的模型探讨了企业家激励系统中的混沌现象，指出企业应采取相应的措施，以适应复杂性，利用混沌。 相似文献
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提出了由一个晶体管、两个电容和两个电阻组成的非自主混沌电路，混沌行为基于积分干扰以及双极性晶体管两极对电容正一反向的充电，调节振荡器的频率得到了完整的混沌仿真波形，并通过PSpice软件计算了李雅诺夫指数，证实了混沌特性。 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献