广播网络

It is proved that this new broadcast algorithm can resolve the problem of broadcast storm that may be caused by the broadcast based on flooding algorithm more efficiently than other algorithms.

并证明了新的广播算法与已有算法相比能够更加有效地解决网络采用洪泛方式进行广播时所可能产生的广播风暴问题。

VLAN divided after the broadcast domain as a result of the reduced network by broadcasting packets to reduce bandwidth consumption, contribute to the emergence of broadcast storm control, reduce equipment investment, simplifying network management, improve network performance and security.

划分VLAN 后，由于广播域的缩小，网络中广播包所消耗的带宽减少，有助于控制广播风暴的产生、减少设备投资、简化网络管理、提高网络的性能和安全性。

Traditional Ethernet, all users share the same broadcast domain and the domain of conflict will cause a decline in network performance, the emergence of switches to solve the problem of domain conflict, while broadcast storm control and network security only through the Road achieved by the device.

传统的以太网中，所有的用户共享同一个广播域和冲突域，会引起网络性能的下降，交换机的出现解决了冲突域的问题，而对广播风暴和网络安全的控制只能通过路由器来实现。

Although the STP which is constituted by IEEE can solved "Broadcast storm", but its convergence is so slow that can not adapt the requirement of core network.

在实际组网应用中，以太网环路的出现会导致"广播风暴"现象(即大量广播包阻塞网络链路)，严重影响网络性能。

ABSTRACT Over the last few years much attention has been paid to the development of the technologies for Community Antenna Television networks. New technologies that can be used to support data communication service over CATV networks are developed. The new Hybrid Fiber Coaxial technology is spreading out rapidly in CATV networks. The usage of fiber provides large bandwidth and thus enables some new services to be delivered along with television broadcast. The CATV networks are expected to support diverse traffic with various service requirements.

随着新技术的不断发展，人们希望能够利用有线电视网络提供新的业务，HFC技术在有线电视网络中的广泛使用使得有线电视网络的带宽增加，也使得有线电视网络除电视广播外还能够提供其他的服务，这些服务的服务质量要求各不相同，如：数据服务要求低的丢失率，对延时的要求较低；而语音服务可容忍一定的丢失，但对延时、延时抖动有严格的要求，因此需要开发新的协议。

Hub can not determine the destination of the packet and type, so if it is still broadcasting packet forwarding, and all equipment issued to radio the way data is sent to each interface, so a hub is also connected to the network broadcast domain.

集线器不能判断数据包的目的地和类型，所以如果是广播数据包也依然转发，而且所有设备发出数据以广播方式发送到每个接口，这样集线器也连接了一个广播域的网络。

For the purpose of saving energy and prolonging the lifetime of ad hoc network, this dissertation discuss the network lifetime in detail, and consider the lifetime and energy synthetically, provide a minimal energy cost maximal lifetime broadcast tree construction algorithm.

2针对移动Ad Hoc网络能量有效性问题，为了节省网络使用过程中的能量消耗，提高网络的生命周期，本文对网络的生命期问题，展开了详细的论述，同时又将生命期与能量消耗结合起来考虑，提出了一个最小能量最长生命周期广播树的构造算法。

These are all exactly alike in their collection of assets, each of them owning broadcast, narrowcast, die-cast, retrocast and cybercast, broadband, narrowband, audio, video, satellite and an upload-and-download phalanx of option-driven interfaces.

这四家公司旗下资产都非常的相似，他们都有广播、窄播、印刷广播、怀旧广播、网络广播、宽带、窄带、音频、视频、人造卫星，以及可以自定义界面的上传下载系统。

The company's main business includes: installation of network cabling project services, cable / fiber jumper / pigtail products such as optical fiber system, the whole room works, security surveillance systems, broadcasting systems, mine grounding, computer network Systems integration, network optimization, network planning and design, safety assessment system, network management consulting, and network equipment sales.

公司的主要业务包括：网络布线工程安装服务、光缆/光纤跳线/尾纤等光纤系统产品、整体机房工程、安防监控系统、广播系统、防雷接地；计算机网络系统集成、网络优化、网络规划设计、系统安全评估、网络管理咨询、网络设备销售。

They foresaw a nationwide Stratovision network, with programs beamed from one airplane to the next. Fourteen airplanes could bring TV and FM radio to 78 percent of the population; a comparable ground installation network would require more than 100 relay points, Westinghouse estimated. A fleet of 60 Martin 202 airliners would suffice...

他们预见了一个全国性的Stratovision网络，广播节目定向地从一架飞机传到另一架飞机。14架飞机可以将电视和调频广播传送到78%人群里，Westinghouse估计，这可能需要地面安装网络要有100多个中继站才能达到这样的效果。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。