An integrated 0.35 μm CMOS optical receiver with clock and data recovery circuit

This paper presents an integrated optical receiver that operates at 1 Gb/s in a standard 0.35 μm digital CMOS technology. The receiver consists of an integrated CMOS photodetector, a transimpedance amplifier (TIA) followed by a post-amplification stage and a dual-loop clock and data recovery (CDR) circuit. At a wavelength of 860 nm, the circuit requires an average light input power of −19.7 dBm to obtain a bit-error rate (BER) of 10⁻¹². The complete receiver consumes a total power of approximately 155 mW from a 3.3-V supply. The core circuit area is 0.85×1.32 mm².     

一种新型的漂移阶跃恢复二极管脉冲源设计

提出了一种基于漂移阶跃恢复二极管（DSRD）、结构简单的新型大功率脉冲源电路.论述了阶跃恢复二极管的快速开关特性,分析了该新型脉冲源电路的工作原理,并进行了实验测试.实验结果表明,脉冲源电路能够产生峰峰值为760 V、脉宽（10％-10％）8 ns的平衡输出脉冲信号,具有脉冲重频高、振铃小、波形质量高、无需高压供电等特点,适用于深层探测超宽带时域脉冲探地雷达系统.     

应用服务器群服务安全监控机制

应用服务器关键硬件的承载状态及应用软件自身的工作状态是网络应用系统服务安全的重要因素,通过对应用服务器中央处理器、内存、网络流量、应用软件目录、文件等监控技术的研究,将动态综合监控、安全审查、应用软件智能修复技术进行集成,构建了网络应用系统的智能监控体系架构,并阐明了实现原理和方法,解决了网络应用系统软硬件工作状态综合监控问题,实现了应用系统硬件和软件工作状态异常时自动报警、定位和应用软件遭受攻击时自动修复的目标.     

Recovery from control plane failures in GMPLS‐controlled optical networks

The health status of the control plane and the data plane of a GMPLS‐controlled optical network is independent in the physically separated control network implementation. In most control plane designs, besides the topology information, the entities of the routing protocol only record the number of available wavelengths on each link. However, the status of each wavelength is maintained by the entities of the signalling protocol. Without recovery ability of the signalling protocol CR‐LDP, a failure in the control plane will result in the permanent loss of the status information of wavelengths. A mechanism to recover the status information of the wavelengths is proposed. A downstream node maintains a label information database (LID) about assignable (free) labels in each incoming link. A copy of LID is redundantly stored in the upstream node as a label information mirror (LIM). A systematic procedure is proposed to synchronize the contents of a LIM and the corresponding LID. The initialization of a new LDP session with the enhanced recovery mechanism will guarantee the revival of the status information of wavelengths. It can recover multiple control channel failures, but it only applies to single node failure among any pair of adjacent nodes. © Crown copyright 2002. Reproduced with the permission of Her Majesty's Stationery Office. Published by John Wiley & Sons, Ltd.     

氢氧能源机的工艺技术优势与应用

中国五矿长沙矿山研究院研发的氢氧能源机由IGBT逆变电源、自动控制系统、氢氧发生功能模块、主水箱、副水箱、水气分离系统、压力自动侦测系统、冷却系统、介质循环系统、防回火系统等功能单位系统组成。其工艺和技术都高于行业标准,安全性能很高,切割工艺的适应性较强,且更加经济、安全。可在替代高能耗、高污染的传统燃气设备在钢铁切割、汽车发动机除碳、医疗垃圾焚烧、锅炉催化燃烧、针剂拉丝封口、民用燃气等多个领域得到推广和普遍应用。     

Modeling Energy Recovery Using Thermoelectric Conversion Integrated with an Organic Rankine Bottoming Cycle

Engine and industrial waste heat are sources of high-grade thermal energy that can potentially be utilized. This paper describes a model system that employs thermoelectric conversion as a topping cycle integrated with an organic Rankine bottoming cycle. The model has many parameters that define combined system quantities such as overall output power and conversion efficiency. The model can identify the optimal performance points for both the thermoelectric and organic Rankine bottoming cycle. Key analysis results are presented showing the impact of critical design parameters on power output and system performance.     

中国造纸工业的发展与碱回收和环境保护

本文介绍了现代化造纸企业，防治污染、保护环境的基本经验，回顾了中国造纸工业碱回收的基本情况，建议中国的造纸企业应合理调整其经济规模，采用成熟先进的工艺技术，加强科学管理，使企业向现代化的方向发展；中国的造纸工业和环境保护，将会得到同步的健康发展。     

热回收在全新风除湿机中的节能研究

分析了GB/T20109-2006所述全新风除湿机节能的5个方面:1)冷凝热回收.2)室内回风热回收.3)冷凝水冷回收.4)处理后新风冷回收.5)新风热回收.通过对典型案例做深入探讨发现:采用板翅式热回收器或热管换热器对新风处理后新风进行冷回收预冷新风,能够降低制冷系统冷负荷20％～30％,显著提高全新风除湿机的单位输入功率除湿量.     

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??Aimed at relevancy chemical equilibrium, material balance and thermal equilibrium of the reaction stove and converter of Claus sulfur recovery by direct method, this paper establishes two nonlinear equations sets, and carries out numerieal calculation by use of the Newton-Raphson algorithm for derivation, measures the composition from the mouth of reaction stove and converter, and calculates the optimum air ration and the optimum reaction temperature. The related problems are discussed and some examples calculated are given.