现网实现OCP的实例

简要说明了什么是光通道保护（OCP）及为什么要采用OCP技术,并通过现网实现OCP保护的实例说明了OCP保护对传统WDM系统上大颗粒（如2.5G、10G）客户电路的保护效果。     

波分系统光层面保护技术的应用研究

本文首先分析了光层面的保护技术,并对目前比较成熟的光线路保护（OLP）、光通道保护（OCP）技术进行了探讨,接着本文从实际工程应用的角度,探讨了光层保护技术的实际应用以及一些需要注意的问题,最后对光层保护的发展方向做了展望。     

Study of the influence of some organics as thiourea derivatives and butindiol in steel pickling baths

The corrosion inhibition effect of the following organic additives: 2‐butin‐1,4‐diol (BD), N,N′‐dimethylthiourea (DMTU), N,N′‐diethylthiourea (DETU) and N,N′‐diisopropylthiourea (DITU), in steel pickling baths (sulphuric acid solutions) was studied by means of weight loss and electrochemical measurements like open circuit potential (OCP), polarization curves and impedance spectroscopy (EIS). A significant decrease in the corrosion rate was observed in presence of the investigated compounds depending on the nature and the concentration of the additives. The weight loss experiments show an inhibitory efficiency that reaches values beyond 98 %. The protective effect increases with the enlargement of the lateral chain size in the case of the thioureas. The electrochemical experiments show also a protective effect of the organic additives against corrosion. Their adsorptive behaviour is found to follow the Langmuir model.     

FPGA上SCA组件的OCP接口实现

SCA中使用CORBA作为分布式处理环境的消息传递技术．以提供软件的可移植性．可重用性和可扩展性。但是．DSP，FPGA等专用硬件处理器（SPecialized Hardware Processors．SHP）要实现对CORBA的支持是很困难的。CP289的目标是标准化组件与其外部环境的通信．它提供了使DSP、FPGA等专用硬件处理器集成到SCA中的机制，特别的FPGA上的组件都通过0CP接口与系统的其他部分通信。本文介绍了一种为FPGA组件实现OCP接口的方法。     

Electrochemistry and surface chemistry of stainless steels in alkaline media simulating concrete pore solutions

Despite the increased use of stainless steel for concrete reinforcement in harsh chloride environments, comparatively little is known about the surface chemistry of these materials in alkaline media simulating concrete pore solutions. This work is concerned with a combined electrochemical and XPS surface analytical investigation on austenitic, ferritic and duplex stainless steels in simple NaOH and more complex alkaline concrete pore solutions. The results show that the passive films on these materials change with immersion time, the ferritic and duplex stainless steels becoming enriched in chromium oxy-hydroxide, the austenitic steel strongly enriched in nickel hydroxide. The composition of the metal layer beneath the surface film is strongly enriched in nickel and depleted in chromium and iron. The results are discussed with respect to the relation between the Fe(II) content in the films and the open circuit potential (OCP) during exposure, the film growth mechanism and localized corrosion resistance.     

Copper deposition onto silicon by galvanic displacement: Effect of Cu complex formation in NH4F solutions

Copper was deposited onto rotating Si substrates by galvanic displacement in 6.0 M NH₄F to determine the effects of Cu complex formation on deposition rates. Deposition rates decreased with increasing rotation speed, indicating that Cu(I) intermediates, stabilized by NH₃, diffuse away from the Cu surface before they reduce to Cu(0). UV-visible spectra of contacting solutions and direct measurements of mass changes resulting from Cu deposition and Si removal confirmed this proposal. These findings contrast those reported previously for deposition from HF solutions, in which Cu(I) species are unstable and reduce rapidly to Cu(0). These data and mixed-potential theory were used to develop a reaction-transport model that accurately describes the effects of mass transfer and electrochemical reaction rates on Cu deposition dynamics and open-circuit potential (OCP) values. The effects of ascorbic acid and tartrate additives on film properties and formation rates were also examined. Cu reduction kinetics decreased significantly when ascorbic acid (0.01 M) was present. Adhesion of Cu films was improved when ascorbic acid was used, but internal stresses caused films to distort when their thicknesses exceeded 100 nm. Adding potassium sodium tartrate to solutions containing ascorbic acid decreased film stresses and led to robust films with excellent adhesion.     

Membraneless laminar flow-based micro fuel cells operating in alkaline, acidic, and acidic/alkaline media

The lack of a polymer electrolyte membrane (PEM, e.g. Nafion) in membraneless, laminar flow-based micro fuel cells (LF-FCs) eliminates several PEM-related issues such as fuel crossover, cathode flooding, and anode dry-out, as we reported previously. This paper explores the media flexibility of LF-FCs by working in acidic and alkaline media, as well under “mixed-media” conditions in which the anode is in acidic media while the cathode is in alkali, or vice versa. Operating a fuel cell under alkaline conditions has positive effects on the reaction kinetics, both at the anode and cathode, while the cell performance under “mixed-media” conditions offers an opportunity to increase the maximum achievable open cell potential (OCP). The lack of media-related constraints and the simplicity of the LF-FC design allow for these experiments to be performed consecutively in a single LF-FC without changing the system, except for altering the composition/pH of the fuel and oxidant stream. The performance of LF-FCs operated with different media is described and compared.     

一种带补偿功能的限流保护电路

分析了一种限流保护电路应用于ＦＬＹＢＡＣＫ变换器时限流保护电流随输入电压变化而波动的原理。之后对该限流保护电路加以改进 ,使限流保护电流的波动范围限制在一个较小的范围之内。实验结果验证了该改进方案的有效性。     

载波同步中数字锁相环的重构设计

针对以往载波同步锁相环中代码或设备不可继承、不可移植所导致的开发效率较低的问题,文中提出了以复用FPGA组件的形式重构载波同步锁相环的方案。该方案通过功能分解提取不同锁相环的共性模块、为功能模块映射合适算法并在FPGA中实现。该方法利用OCP协议封装接口生成FPGA组件,最终复用组件以构建新锁相环应用。仿真实验结果显示,组件复用率超过60%,证明了新方法的正确性和有效性。