自适应和声搜索算法及在粗糙集属性约简中的应用

针对改进和声搜索算法（ＩＨＳ）存在的不足,提出了自适应和声搜索算法（ＡＨＳ）．该算法利用和声库中变量函数的最大差值来调节ＰＡＲ 和ｂｗ,从而提高了对多维问题的搜索效率．利用５个标准测试函数对ＡＨＳ算法进行测试,并应用于粗糙集的属性约简中．仿真结果表明了该算法的有效性和实用性．     

无线传感器网络的安全认证协议研究

在对现有无线传感器网络公钥认证机制进行研究的基础上,提出了一种新的基于椭圆曲线公钥算法的部分分布式认证协议PDAP(partly distributed authentication protocol).在协议中,综合采用了门限秘密共享及证书合成的思想,将数字证书应用于无线传感器网络.同时,针对传感器节点计算能力、存储空间和能量有限的特点,对传统X.509证书的结构重新设计,通过重构的数字证书实现了节点的分布式认证.分析结果表明,该协议能够满足资源有限的无线传感器网络的安全性要求.     

基于依赖图信任模型的证书路径构造方法

在现行PKI信任模型的证书路径构造方案中,层次模型证书路径构造对根节点安全性依赖过高,而网状模型路径构造时存在回路。针对上述问题,提出一种新的依赖图信任模型,证明依赖图节点之间有多条路径且没有回路,给出新模型下的证书路径构造方法。实验结果表明,新模型的证书路径构造效率等同于层次模型,安全性与网状模型相近。     

基于证书的可验证多秘密共享方案

提出了基于证书的可验证多秘密共享方案,不仅可以同时验证庄家和参与成员的诚实性,而且不需要安全信道为参与者传递秘密信息。该方案还具备在同一组分享者中可共享任意多个秘密,且参与者只需使用同一个子秘密就可恢复任意多组秘密的特点。当有新的参与者加入时,庄家只需公布一个由多项式函数计算出来的公开值,不需要更改已有参与者的信息。     

支持ECC数字证书的IKEv2认证设计

数字证书对因特网密钥交换协议版本2IKEv2（Internet Key Exchange version 2）的初始化交互协商的安全及效率有很大的影响。提出了一种基于ECC数字证书的身份认证机制,并在IPSec VPN系统的IKEv2初始化过程中应用ECC数字证书实现了通信双方的身份认证。在同等测试条件下,相同安全等级的ECC证书与RSA证书对IKEv2协商效率的对比结果表明,采用基于ECC的X.509证书进行身份认证,能够有效地提高IKEv2初始化过程的效率和安全强度。     

A multi-criteria evaluation framework for tradable white certificate schemes

Recent years have witnessed regained political momentum on energy efficiency and interest in establishing markets is growing. As a result, Tradable White Certificate (TWC) schemes of differing design have been implemented in Great Britain, Italy and France. Much attention is being paid to justifying and evaluating such schemes. In this paper, we develop and apply a multi-criteria framework for evaluating TWC schemes—an approach that attempts to cover their individual design features. A broad evaluation is conducted regarding energy-saving and environmental effectiveness, economic efficiency, cost-effectiveness, transaction costs, political feasibility, administrative burden and technical change. The results show the design and performance of TWC schemes to be case and context-specific, and generalisations are thus inappropriate. This evaluation supports the cost-effectiveness modelled for the British scheme and the assumption that a TWC scheme is an economically efficient policy instrument. For the other, more complex TWC schemes, more data and experience are needed to judge their ex-post merit. On the whole, the proposed multi-criteria evaluation requires considerable data and complementary methods. However, the framework improves the understanding of the broad effects and attributes of TWC schemes. It deals with various empirical and normative aspects that can be applied in their evaluation.     

White certificate schemes: Economic analysis and interactions with the EU ETS

This paper examines the economic, environmental and distributional impacts of an idealised tradable white certificate (TWC) scheme and shows how the impacts are modified when the scheme operates in parallel with the EU emissions trading scheme (EU ETS). It uses simple graphical techniques to assess whether a TWC scheme will increase, decrease or have an ambiguous effect on electricity demand, wholesale and retail electricity prices, carbon emissions and investment in energy efficiency, paying particular attention to the interpretation of ‘additionality’.     

多类社区属性的设计应对

文章以建筑师群体所担任的技术服务者的角度,将社区营造”朴素地还原为技术与服务的双重建构,即通过社区属性与设计策略之间的应对关系,从一个侧面探讨了大型设计机构在人居建筑方面所需关注的技术问题和服务方式。作为目前国内居住建筑设计业务量最大的设计机构之一,CCDI（中建国际设计顾问有限公司）将目前业务涉及的社区类型归纳为五类基本属性,并通过十个案例论述了在多方限制之下实现设计产品提升的实践之路。     

Energy performance building evaluation in Mediterranean countries: Comparison between software simulations and operating rating simulation

The European Community introduced the energy certificate of buildings to reduce the energy consumption in buildings and emanated some standards in order to publicize the energy buildings certificate procedure. Consequently, to calculate energy performance of buildings (EPB), many numerical codes have been developed, which take into account several parameters in static or dynamic conditions.     

图形文件中框架的获取

分析比较了框架和ＡｕｔｏＣＡＤ图形结构的共性，提出了一从ＡｕｔｏＣＡＤ图形中获取图形信息的框架的方法，给出了两个实现框架获取的函数和命令以及一个简单的实例。