排序方式: 共有101条查询结果,搜索用时 15 毫秒
1.
Design and validation of wireless strain test system for bridge based on the resistance strain sensor 总被引:1,自引:0,他引:1
In order to achieve an access to strain sensor data with wireless transmission in bridge engineering structure testing, a wireless strain test system is presented based on the resistance strain sensor of networks. The wireless bridge strain test system composed of master station and substation adopts the wireless method to realize the high accuracy data acquisition between the master station and the substation under a reliable communication protocol. The system has been tested in contrast with the present strain apparatus. Results show that the wireless system is high-reliable, and has many characteristics such as high efficiency, good precision, high stability with low cost, and good flexibility, without using the present communication network. 相似文献
2.
集群系统管理与计费终端的程序设计 总被引:2,自引:0,他引:2
移动通信系统已开始运用计算机技术进步自动化管理。根据移动通信系统的要求,我们研制了系统管理计费终端与系统控制器的接口电路和管理计费软件。本文叙述了进行系统管理与计费工作过程,给出了较件程序流程。 相似文献
3.
交换矩阵网络的控制与设计方法 总被引:1,自引:0,他引:1
介绍利用MCS-51系列单片微机技术,实现对模拟开关阵列集成电路的控制,提出了利用模拟开关阵列集成电路的级联构成交换矩阵网络,完成多条有线电话与多个无线信道之间的自动接续。 相似文献
4.
Wide band or broadband access was paid much attention with the development of radio transmission technique. The wireless access control procedure play an important role in this type of system and efficiency of control algorithm has a great impact on throughput of channel resource. Based on wide band network control model and the characteristics of radio channel, this paper proposed a channel traffic estimation method and then performed a dynamic parameter control procedure and give detail analysis on estimation error and its impact on channel throughput and delay performance. Computation and simulation of system performance show a positive solution on system design. 相似文献
5.
对实际网络业务大量的测量表明,网络中的业务量存在着自相似特性,移动Ad Hoc网络中的业务同样具有该特性.目前对于移动Ad Hoc网络方面的研究只限于实测和简单的定性分析.采用更接近实际情况的队列长度有限G/D/1排队模型对移动Ad Hoc网络性能进行了分析和仿真,结果表明自相似业务导致排队性能变差,缓存匮乏,时延和分组丢失概率恶化.为此提出了基于网络规划模型的适用于自相似业务的路由算法.该算法利用多路径备份路由,当链路失效时可以迅速地寻找到新的替代路由,减小缓存中排队时延和丢包率,并对网络的发射功率进行优化提高信道空间的复用度.仿真结果表明,该算法可以改善分组丢失概率,提高网络吞吐量,降低时延. 相似文献
6.
7.
8.
9.
10.
第三代移动通信候选标准方案的比较和分析 总被引:5,自引:1,他引:4
本文分析和比较了分别以日本,美国,欧洲为代表提出的W-CDMA,宽带cdmaOne和TD-CDMA系统的特点,探讨了第三代移动通信系统的发展趋势及需要解决的问题。 相似文献