Allocating point-to-point connections over point-to-multipoint optical channels

Optical channels are currently able to carry 10 Gbit/s and even 40 Gbit/s traffic flows. However, it is not usual to have such amounts of traffic between any pair of client nodes. This article proposes using point-to-multipoint optical channels for the allocation of point-to-point connections in transparent wavelength-routed optical networks. Specifically, when an optical connection between a source-destination node pair has to be established, the optical signal is also sent to some adjacent nodes by introducing passive optical splitters; in this way a light-tree is built. Then, the already established point-to-multipoint optical channel can be used to groom further point-to-point connections between the same source node and each of the other nodes composing the light-tree. The benefits of this strategy are 2-fold: first, the reduction of optical transmission equipments allowing cost savings with respect to the traditional typical point-to-point approach and, second, the optimization of the optical channels utilization meeting in such a way Traffic Engineering objectives. The merits of proposed approach are evaluated by simulation.     

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介绍了EAST托卡马克逆磁线圈加补偿线圈的逆磁测量。该方法的优点是补偿线圈有效地消除了纵场线圈产生的磁通变化,而调节机构能降低来自极向场的误差信号。详细地叙述了逆磁线圈工程设计中考虑的材料选择和结构设计对逆磁线圈的影响。最后给出了次测量系统的误差分析。     

网络路由研究中的博弈论思想

对调整路由过程中存在的一个非合作非零和的动态博弈模型进行了深入的探讨，使之达到一个均衡，使得任何用户不会单方面改变路由策略从而获得更好的性能。分析了两种交互过程以及当前在自私路由中求解均衡的建模方法，对路由研究中的博弈论思想做了进一步的探讨，从而得到求解均衡的一般方法。     

CAN总线在电机监控系统中的应用

CAN现场总线是一种有效支持分布式控制和实时控制的串行通信网络。文中介绍了CAN现场总线在电机监控系统中的应用设计，给出了监控系统的整体结构和智能监控单元的一般结构，着重叙述了CAN总线通讯技术中的识别符设计和通讯软件的流程。