共查询到20条相似文献，搜索用时 62 毫秒
1.
《洛阳师范学院学报》2015,(8):57-60
针对通信网络的设计,利用最小生成树的KRUSCAL算法与改进的哈密顿回路等方法,建立了最小生成树模型、结点故障的环形改进模型、链条破坏的环形改进模型,运用MATLAB编程计算,得出兼顾可靠性与成本费用的合理优化铺设方案,通过比较不同可靠程度下边际新增费用大小,给出了边际新增费用最小的优化网络结构,并将规划后的网络结构拓扑图直观呈现. 相似文献
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在移动IP通信过程中,数据包需要经过网络中多个指定的节点,以保证节点的移动性;同时移动IP以其独有的特性和特点要求使用一种不同于固网的路由方案以保证移动节点的代理切换时延尽可能小。基于具有很强的随机性和自适应性的蚂蚁算法,将网络的容量限制、流量变化和最短距离结合起来,通过在找到的最短路径上设置障碍物来模拟网络拥塞,找到源结点。目的结点的多条最优路由序列,以便在实际中实时地、自适应地进行动态路由选择。 相似文献
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基于语义叠加网的对等网搜索机制 总被引：1，自引：0，他引：1
针对目前超结点叠加网络研究中的不足,将语义信息引入到超节点的组织过程中,提出了一种新的对等网搜索模型———SSP2P.模型中结点依据小世界理论在物理上形成自然的区域自治系统(AAS),各AAS依据幂规律选取各域内的超结点,超结点再根据语义关系形成多个超结点语义网(SSN),从而形成一个层次化的超结点叠加网络模型.实验结果表明:该模型在保证系统扩展性的基础上有效地提高了搜索效率,减少了通信开销.证明在超节点叠加网络的构建过程中语义信息的引入有利于对等网搜索性能的提高. 相似文献
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胡恒峰 《中小学实验与装备》2006,16(6):27-29
目前绝大多数学校拥有校园网,但很多都使用有线网络,它受到布线的限制,而且存在线路容易损坏、网络节点不可移动等缺点,在连接距离较远的结点时,铺设施工难度大,工作效率低。而随着WLAN技术标准的不断推出以及基于这些标准的无线产品的出现,WLAN的应用和普及已发展到了一个新阶 相似文献
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完善的铁路GSM网络覆盖不仅能给用户提供便利的通信服务,创造更优质的网络价值,而且是以后第三代移动通信网络的铺设和扩容提供坚实基础;不但能为中国移动业务的发展带来商机,也能为我国信息化的发展带来巨大的促进作用。本方案通过使用BBU+RRU这种组网方式,针对对不同区域类型,不同覆盖场景的解决方案论述,可为高速铁路的覆盖达到最优的效果,同时也可为其他同类工程提供参考和借鉴。 相似文献
6.
李天全 《中国教育技术装备》2009,(18):106-107
传统计算机网络中的网络结点主要是被动地在各端系统之间提供比特传输,而对数据本身的语义不作分析解释,仅具有报文头处理或产生信号等极少的计算功能.而主动网络作为一种新型的网络计算模型,其网络中的结点不仅能够在用户数据上执行较高级别的计算操作,而且允许具体用户根据具体要求来定制主动程序,使传输网络具备一定的智能.主动网络的构建是基于传统网络的,将传统网络中某些关键位置的网络结点配置为主动结点,使主动网络结点与传统网络结点(路由器、变换机等)各司其职、协同工作于一个网络环境中. 相似文献
7.
《实验室研究与探索》2015,(9):111-114
阐述了网络层路由的基本概念、工作原理及特点,通过Packet Tracer仿真设计了静态路由、动态路由综合实验,实现了不同网络结点之间的通信,让学生能够从理论上和实践上更好地掌握网络层路由技术。 相似文献
8.
从产业集群网络视角研究了医药产业的创新活动,分析了医药产业集群网络结点构成及结点之间的互动关系,并基于结点间的互动对于医药产业创新的影响构建了医药产业网络创新模型。 相似文献
9.
研究了无标度网络的通信动态,提出两个新的网络资源分配方案,即基于节点负载特征方案和基于节点度的方案,并给予了合理性解释．仿真研究表明,这两个方案都能明显地提高网络的通信容量． 相似文献
10.
在全球化和知识经济背景下,技术创新模式从传统的线性创新模式向网络创新模式特变,区域创新网络成为一种分析区域创新与发展问题的崭新视角。因此,明晰区域创新网络内涵,对区域创新网络主要结点以及结点间关系链条的形成进行深入分析,将有助于加强我国各地区结点联结和创新网络的形成。 相似文献
11.
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
12.
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
13.
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
14.
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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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
18.
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
19.
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
20.
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