任意单模光纤的微弯损耗与模场半宽之间的关系

本文导出了任意单模光纤的微弯损耗与近场二阶矩模场半宽W_(x1)、W_(y1)的关系式,在圆对称情况下我们的公式将简化为已有结果。     

气象检测微系统软件开发

介绍了由硅微传感器组成的自动气象站网络 ,并对整个网络的数据采集和数据处理的系统软件的实现做了详细的说明 ,而且从系统的硬件组成到系统软件的模块设计都作了介绍。本软件完成了从远程控制系统采集现场的气象数据 ,实现了一机对多机的数据采集功能 ,同时对数据丢失的原因做了初步探讨     

具有随机到达时间的扩频PRMA及其性能分析

本文首先提出了一种称为具有随机到达时间的扩频多址协议，然后用马氏链分析方法分析了该协议的信道利用率及话音分组丢失率，给出了于个计算分级 失率的公式，如果把每一时隙时址码的数目定为１，这个公式也可同样用于ＰＲＭＡ分组丢失率的计算，这是文献「４」中没有解决的问题，我们利用了延时捕获得现象来改进该协议的性能，在理论分析及模拟中，我们也考虑了分组传输错误对协议性能的影响，理论分析及模拟结果均瞎时捕获得现象     

Research on router device of OAM optical communication

With the development of orbital angular momentum (OAM) based optical communication technology,OAM router played an important role in improving the flexibility and practicability of OAM communication system.In recent years,the research on multifunctional OAM router had also been developed rapidly.Based on this,the research results on the OAM router had been summarized and reviewed,in which the principles,research methods,advantages and disadvantages of six types of OAM router,with the functions of switching,multicast,filtering,adding/extraction,and jumping and mode dividing respectively,had been discussed and summarized in details.Meanwhile,the future developing trend of the OAM router has also been prospected and discussed in the end.     

波分复用波长路由节点的阻塞特性分析

利用概率统计理论的方法，从节点层次上定量分析了节点规模、复用波长数目以及波长转换对波分复用(WDM)波长路由网络中波长路由节点的影响。提出了基于概率统计的节点阻塞模型。数值结果突出表明波长转换能力越强的全光节点，其性能越优。为了提高网络资源的使用效率并增强全光网络的灵活性，必须实现全光网络中的虚波长路由波长转换器。通过数值计算找到了阻塞性能和代价的折中，研究中发现配置较低波长转换能力波长转换器的波长路由节点将会具备更强的性价比优势，当前在构建光通信系统时使用弱波长转换能力的光节点更可行。     

PC机与AVR单片机之间串行通信的实现

基于RS232串行通信协议，阐述了一种PC机与AVR系列单片机Atmega128之间串行通信的实现方式，实现了PC机与单片机间数据的双向传输。其中PC机为主发送端，单片机为主接收端。硬件上，简单介绍了利用MAX232E芯片解决PC机与单片机电气规范不一致的方法。软件上，PC机端通信程序采用C语言嫡程，运用Turbo C库函数bios.h中提供的调用BIOS软中断的函数bioscom()实现；单片机端通信程序采用C51嫡程，使用UART接收结束中断、UART发送结束中断。本文提供了相关C语言和C51源程序。     

Triggered single-photon emission and cross-correlation properties in InAlAs quantum dot

Triggered single-photon generation from InAlAs quantum dot (QD) was demonstrated for the first time. Emitted photon energy coincides with high detection efficiency range of Si single-photon detectors, which is highly suitable for free-space communication. Single-QD spectroscopy and crossed photon correlation measurements unambiguously revealed that several emitting lines observed in a single mesa structure originated from the identical QD, and two temporary competing decay processes associated with neutral states and charged states were identified. Presence of the competing process is also inferred from an analysis of steady-state photoluminescence intensities. Formation process of charged exciton in QD is also discussed.     

基于Browser/Server模式下的通信电源远程监控

在对传统的基于客户/服务器端工作模式下的通信电源远程监控系统特点分析基础上,提出了使用浏览器作为通用客户端的监控系统,也就是通常所说的浏览器/服务器结构的网络应用.该系统易于维护和升级,操作简单.对于降低运行成本,实行状态监控起了重要的作用.     

高速光纤通信系统中偏振模色散问题的研究概述

本文从起因、定义和补偿技术等方面对单模光纤中的偏振模色散问题做了简要介绍。     

A Model for Information Processing Capacity: Formalizing the Impact of Structural and Information System Choices on Organizational Performance

This paper proposes a formal model of information processing inorganizations. The model takes a process view of organizations and includesboth structural and IS features of processes. Two structural properties areconsidered, networking and parallelism. Information systems are representedin terms of quantity of information used and level of informationcustomization allowed. Process performance is measured in terms of totalinformation processing capacity and flexibility afforded by a process. Therelationship between structural and information system choices and processperformance is studied by simulating the model for a range of values. Thepaper derives a set of propositions describing the independent and combinedimpact of structural and information system choices on performance. The results suggest the predominance of networking over parallelism and ofinformation customization over information quantity in determininginformation processing capacity. They also show a negative effect ofnetworking on process flexibility and an amplifying effect of networking onthe benefits of information customization. Overall, the findings validatethe interdependence between structural and information system variables indetermining process performance.