共查询到20条相似文献，搜索用时 562 毫秒
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采用Socket的通信方法,根据TCP／IP通信协议进行数据传输,基于Android操作系统平台,通过Zigbee无线通信与自组网技术,设计了以Android操作系统为平台的客户端应用程序,实现了通过无线wifi网络与Windows系统的电脑服务器之间进行通信,解决了如何利用基于Android系统的手持终端对Zigbee无线网络中的LED灯光进行远程调控的问题,提出并实现了一种新的LED灯的智能控制方案． 相似文献
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目前,企业内部大量部署的是支持SIP的IP-PBX,将计算机网和电话网集成在一起;NAT技术的出现,缓解了IP地址紧张的局面.通过NAT设备实现企业内部私网连接到公网.但NAT设备不能支持运用SIP协议的音频和视频的穿越,因此,实现SIP穿越NAT是一个迫在眉睫的难题.本方案中提出SIP Trunk网关技术,在不增加辅助设备的情况下,实现SIP协议成功的穿越NAT,节省了造价和维修成本. 相似文献
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基于DHCP和目录服务的校园网IP地址管理系统的研究与实现 总被引：2，自引：0，他引：2
随着校园网的不断发展,手工管理IP地址变得越来越困难,采用动态主机配置协议(DHCP)管理IP地址已经成为校园网建设的发展趋势。本文分析了DHCP的优点和不足之处,提出了将DHCP与目录服务相结合的IP地址管理方案;介绍了按这种方案实现的北京邮电大学学生宿舍网IP地址管理系统的功能与设计。 相似文献
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介绍了利用IP Filter包过滤功能在网络出口组成防火墙实现网络安全，并通过一个校园网作为实例，说明包过滤规则的制定和IP Filter上的配置。 相似文献
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楼钢锭 《中国科教创新导刊》2008,(26)
本文从分组网的ECC通信角度出发,论述了椭圆曲线密码理论研究,讨论研究了多媒体终端通信的安全与保密。简要地描述了椭圆曲线上的基本算法及椭圆曲线的基本密码学性质,结合H.235协议与H.323终端的通信流程,完整实现了增强IP分组多媒体通信的安全与保密。 相似文献
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《武汉职业技术学院学报》2018,(1):89-91
给出了无需专用的IP-PBX,仅利用带有语音功能模块的路由器在IP网上跨网段实现Vo IP的配置实例,分析了关键配置及保证Qo S的高级配置并验证了业务。在真实设备上应用该部署时,还要充分考虑拨号方案、号码扩展、租用线路上的Vo IP上的Qo S等。 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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《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
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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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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,(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