我国固定网本地环路分拆问题的探讨

我国电信业新的竞争格局和宽带接入需求的增长推动了固定本地网领域的竞争。本地环路分拆有助于促进竞争同时减少重复建设。本文介绍了本地环路分拆的概念，对我国实施本地环路分拆的必要性进行了论述，并借鉴其他国家的实施经验，对我国实施本地环路分拆的监管政策提出了建议。     

585nm脉冲染料激光治疗皮肤血管性疾病所致的副作用

目的:观察585nm脉冲染料激光治疗血管性疾病所致的副作用。方法:分析500例经585nm脉冲染料激光治疗后的副反应。结果:500例接受治疗的患者中发生副反应者89例。其中色素沉着35例、色素减退12例、萎缩性瘢痕40例、增生性瘢痕2例。出现副反应与疾病种类、治疗能量无关,与治疗次数有关。结论:585nm脉冲染料激光治疗血管性疾病无连续激光治疗后所致的增生性瘢痕、持续性色素沉着等副作用,用于治疗血管性疾病是比较安全的。     

Modeling and simulation of InAs/GaAs quantum dot lasers

Based on the analysis of carrier dynamics in quantum dots (QDs), the numerical model of InAs/GaAs QD laser is developed by means of complete rate equations. The model includes four energy levels and among them three energy levels join in lasing. A simulation is conducted by MATLAB according to the rate equation model we obtain. The simulation results of PI characteristic, gain characteristic and intensity modulation response are reasonable. Also, the relations between the left facet reflectivity of laser cavity and threshold current as well as modulation bandwidth are studied. It is indicated that the left facet reflectivity increasing can result in reduced threshold current and improved modulation bandwidth, which is in accordance with experimental results. The internal mechanism of QD lasers is fully described with the rate equation model, which is helpful for QD lasers research.     

Application Aware Topology Generation for Surface Wave Networks-on-Chip

The networks-on-chip （NoC） communication has an increasingly larger impact on the system power consumption and performance. Emerging technologies, like surface wave, are believed to have lower transmission latency and power consumption over the conventional wireless NoC. Therefore, this paper studies how to optimize the network performance and power consumption by giving the packet-switching fabric and traffic pattern of each application. Compared with the conventional method of wire-linked, which adds wireless transceivers by using the genetic algorithm （GA）, the proposed maximal declining sorting algorithm （MDSA） can effectively reduce time consumption by as much as 20.4% to 35.6%. We also evaluate the power consumption and configuration time to prove the effective of the proposed algorithm.     

GSM网络掉话率的优化

本文对厦门GSM网络的掉话原因进行分析,并总结出各种具体的优化方法及其效果.     

西门子全集成自动化理念初探

系统阐述了全集成自动化理念的内涵，指出其特点在于统一的数据管理、统一的编程组态、统一的通讯以及无与伦比的开放性，其中采用WINCC与STEP7两个软件进行了说明，井提出全集成自动化应用将是今后自动化技术发展应用的方向。     

应用于光触发晶闸管触发的特种光纤性能分析

对光触发晶闸管应用中使用较广泛的一种特种光纤进行了性能分析,对该光纤的芯层与包层的掺杂和包层/芯层直径比等关键光学特性进行了系统的研究,为光触发晶闸管寻找到性价比较优的特种光纤提供了参考。通过对比分析得出,在光触发晶闸管触发应用中,光纤设计类型为芯层直径200μm,包层直径250μm;采用阶跃折射率分布设计;芯层掺杂为锗氟共掺,芯层掺杂量为锗元素16mol%、氟元素5mol%;包层掺杂为氟元素,包层掺杂量为1mol%的光纤触发性能较优,适合光触发晶闸管的应用。     

无线网络优化经验浅谈之处理呼叫建立成功率低的方法

本文描述了无线网络优化中呼叫建立成功率低的处理思路和方法。