基于CFL_BLP模型的CFL SSL安全通信协议

现有PKI、IBC认证技术与SSL/TLS通信协议已不能满足当今网络空间新兴信息产业的毫秒级信息安全需求。针对新兴信息产业的毫秒级通信安全问题,以CFL为原点技术,并基于CFL_BLP模型给出CFL SSL协议及其形式化描述,从协议层面上证明该协议可实现毫秒级双向认证、通信的机密性和完整性保护、自主可控以及防止中间人攻击等信息安全属性。实验结果表明,与SSL/TLS协议相比,该协议的可用性和安全性更高,且能够满足各种新兴信息产业通信机制的毫秒级信息安全需求。     

n型单晶硅片的电阻率和扩散方阻对IBC太阳电池电性能的影响

叉指背接触式(IBC)太阳电池因正面没有金属栅线遮挡,具有较高的短路电流,且组件外观更加美观。但由于IBC太阳电池正负电极在背面交叉式分布,在制备过程中需要采用光刻掩模技术进行隔离,难以实现大规模生产。采用Quokka软件仿真模拟了电阻率和扩散方阻对n型IBC太阳电池效率的影响,并对不同电阻率和扩散方阻的电池片进行了实验验证,从n型单晶硅片电阻率的选择和扩散工艺优化方面为IBC太阳电池的规模化生产提供了理论基础。实验结果表明,电阻率为3~5Ω·cm、扩散方阻为70Ω/时,小批量生产的IBC太阳电池平均光电转换效率可达23.73%,开路电压为693 mV,短路电流密度为42.44 mA/cm²,填充因子为80.69%。     

A unified method for the design of telecommunication services

This paper describes a method for the design of telecommunication services. The method is aimed specifically at Integrated Broadband Communications (IBC) services, and describes two perspectives to the design of applications: the external perspective and the internal perspective. An external perspective is one that enables the whole application to be viewed for the purposes of the design of communication support. An internal perspective is one that enables consideration of only part of the application from the point of view of a human communicating entity. The use of the method is illustrated with respect to a tourism application.     

十运会IBC赛事共享系统的实时场记

本文首先简单介绍了IBC赛事共享系统的总体结构、各子系统以及系统流程,接着重点介绍了IBC赛事共享系统中的实时场记部分,并从应用的角度阐述了场记工作的流程及管理.     

世妇会IBC电视转播系统设计

本文作者参与了世妇会ＩＢＣ电视转播系统的设计，施工，测试及运行的全部过程，文章详细介绍了系统的总体要求，基本方案，设计及运行，以及由此得出的几点经验。     

Vibration Testing of Intermediate Bulk Containers for Dangerous Goods

Intermediate bulk containers (IBCs) for liquid dangerous goods require a ‘vibration test’ for type approval introduced in the United Nations Recommendations on the transport of dangerous goods. The test has to be performed as a repetitive shock test practically identical to the test procedure previously prescribed by the US Department of Transport. It is conceptually simple but has several drawbacks. The kinetics and dynamics of a bouncing IBC have been investigated by means of simple computational models. With increasing complexity, partially plastic impact, elastodynamic response and the excitation of internal vibrations not directly affected by the bounces can be covered. The latter is a model for the sidewall vibrations. The numerical results show that the control over the specimens' response is only partially defined in the test procedure. Chaotic movements at resonance are possible and must be suppressed by changing the test parameters, which is mostly left to the test engineer. Accordingly, it is not possible to interpret the test results with a sound relation to real transport vibration environment. Experimental results, however, suggest that vibration testing of IBCs improves safety because resonance effects in a frequency range excited by typical transportation loads exist. A more detailed numerical model is necessary for the assessment of the fatigue damage imposed on IBCs by the prescribed or alternative, more realistic test procedures. Copyright © 2011 John Wiley & Sons, Ltd.     

Interdigitated back‐contact heterojunction solar cell concept for liquid phase crystallized thin‐film silicon on glass

We present an interdigitated back‐contact silicon heterojunction system designed for liquid‐phase crystallized thin‐film (~10 µm) silicon on glass. The preparation of the interdigitated emitter (a‐Si:H(p)) and absorber (a‐Si:H(n)) contact layers relies on the etch selectivity of doped amorphous silicon layers in alkaline solutions. The etch rates of a‐Si:H(n) and a‐Si:H(p) in 0.6% NaOH were determined and interdigitated back‐contact silicon heterojunction solar cells with two different metallizations, namely Al and ITO/Ag electrodes, were evaluated regarding electrical and optical properties. An additional random pyramid texture on the back side provides short‐circuit current density (j_SC) of up to 30.3 mA/cm² using the ITO/Ag metallization. The maximum efficiency of 10.5% is mainly limited by a low of fill factor of 57%. However, the high j_SC, as well as V_OC values of 633 mV and pseudo‐fill factors of 77%, underline the high potential of this approach. Copyright © 2015 John Wiley & Sons, Ltd.     

聚乙烯中空容器的市场分析

全面介绍了聚乙烯中空容器的发展、演变及目前的分类,阐述了近年来各地厂商发展的状况,分析了中 空容器市场上聚乙烯原材料的现状,论述了未来几年聚乙烯中空容器的主流发展方向及应对策略。     

体育赛事转播系统及业务承载的初步思考

简要介绍了体育赛事转播系统的系统架构以及场馆电视转播设施的主要组成部分以及转播对网络的主要技术指标要求,并针对体育赛事转播业务的主要承载技术进行了分析,并希望能为后续的类似活动提供借鉴。     

各向异性材料涂覆目标电磁散射特性仿真

该文基于阻抗边界条件(IBC),提出了3维各向异性材料涂覆目标电磁散射特性的矩量法(MoM)解决方案。根据表面等效原理,采用感应电磁流以3维RWG(Rao-Wilton-Glisson)矢量基函数展开的伽略金法。以表面阻抗矩阵表征电磁参数,实现各向异性材料涂覆目标的电磁仿真,算例结果与Mie级数解等精确结果吻合良好。对各向异性材料涂覆复杂目标的电磁散射特性进行分析,为目标的雷达隐身和反隐身提供理论支持。