While a control packet is processed at each switching node , an all optical light path is set up dynamically for the corresponding data packet . switching node architecture and scheduling algorithm have great influence on packet loss rate in obs network . this paper proposed a port modularized scheduling policy that combines these two aspects , with the aim of reducing burst packet loss rate 其中严格的端口模块化策略可以避免m p p交换结构的内部阻塞,在单核心节点的网络上使丢失率降到0 ,但不适用于多核心节点的多跳网络;修改的端口模块化算法通过设置合适的参数,平衡各个节点上调度资源的使用,在全网达到较低的丢失率。
As a new velocity sensor , fvisar has the merit of compact structure , short coherence length , easy to adjustment light path , any fringe constant and so on . the principle of fvisar analyzed from two different theories ( traditional coherent theory and doppler frequency shift theory ) lead to the same velocity equation which is the solid theory foundation of the fvisar design 第二章分别从经典的光干涉理论和多普勒效应两方面对fvisar的工作原理作了详尽的理论分析,两者得出了相同的速度计算公式,从而为全光纤速度传感器的设计打下坚实的理论基础。
Firstly , the relationship of atomic force and distance is studied . the scan type of samples and the working mode of probe is confirmed , then pzt is chosen as actuator for micro scan displacement , and optical deflexion method is used to detect the deflexion value of cantilever . after all these work , the system light path design is finished , and its mathematical model is completed 首先,分析了原子力探针系统的中原子力?距离的关系,并确定探针系统的探针的工作模式和样品的扫描模式,从而选择压电陶瓷作为扫描微位移驱动器;采用光学偏转法检测微悬臂偏转量,并选用了psd作为传感元件,并在此基础上进行了系统光路设计及其数学模型的建立。