Event-driven,pattern-based methodology for cost-effective development of standardized personal health devices

Experiences applying standards in personal health devices (PHDs) show an inherent trade-off between interoperability and costs (in terms of processing load and development time). Therefore, reducing hardware and software costs as well as time-to-market is crucial for standards adoption. The ISO/IEEE11073 PHD family of standards (also referred to as X73PHD) provides interoperable communication between PHDs and aggregators. Nevertheless, the responsibility of achieving inexpensive implementations of X73PHD in limited resource microcontrollers falls directly on the developer. Hence, the authors previously presented a methodology based on patterns to implement X73-compliant PHDs into devices with low-voltage low-power constraints. That version was based on multitasking, which required additional features and resources. This paper therefore presents an event-driven evolution of the patterns-based methodology for cost-effective development of standardized PHDs. The results of comparing between the two versions showed that the mean values of decrease in memory consumption and cycles of latency are 11.59% and 45.95%, respectively. In addition, several enhancements in terms of cost-effectiveness and development time can be derived from the new version of the methodology. Therefore, the new approach could help in producing cost-effective X73-compliant PHDs, which in turn could foster the adoption of standards.     

一种基于代理签发的PMI特权委托模型

代理签发服务是X509 2005修正草案中提出的一种新的特权委托方式,该方式实现对证书的代理签发,具有策略易于发布、审计方便、密钥易于维护等优点。通过分析X509 v4（2000）中委托模型的不足,基于X509 2005修正革案中的DIS提出了一个包含代理签发模块的委托模型,并对该模型的性能进行了进一步的分析。     

复型法在核承压设备点蚀测试中的应用

对复型法测量点蚀坑大小、分布等进行了实验研究，分析了该方法的现场检测操作步骤和适用范围。     

矿山生产经济函数与DIM分析

分析了矿山生产系统的特点，建立了矿山生产经济函数，对露天矿生产工艺、生产因素进行了二元交互作用矩阵分析，提出了求解二元交互作用矩阵的算法，通过最优计划、最优协调、最优控制使矿山生产系统在一定约束条件下最佳运转。     

Top-hat selection transformation for infrared dim small target enhancement

Abstract

To improve the performance of top-hat transformation for infrared dim small target enhancement, a top-hat selection transformation is proposed in this paper. First, the top-hat selection transformation is defined and analysed based on analysing and improving of classical top-hat transformation. Then, the top-hat selection transformation is used to enhance infrared dim small targets. The calculation of parameters used in top-hat selection transformation for infrared dim small target enhancement is discussed in detail. Various experiments verified that top-hat selection transformation was effective for infrared dim small target enhancement.     

基于可信计算的动态完整性度量模型

静态完整性度量不能保护系统在运行过程中的完整性。为此,提出一种基于可信计算的动态完整性度量模型。在现有的完整性度量架构中引入虚拟化技术,有助于系统管理员掌握系统在运行过程中的完整性。在软件加载后,对运行中的进程行为进行监控,动态度量其完整性。分析结果表明,该模型能防止运行过程中恶意攻击破坏系统的完整性,从而提高系统安全性。     

Measurement of non-uniform residual stresses using the hole drilling method, a new integral formalism

A new analysis technique in combination with a finite element calculation is introduced to resolve the residual sress profile of measurements performed with the hole drilling or ring core method.     

核电站实时风险管理系统部件重要度计算方法研究

在PSA中,重要度分析都是基于基本事件进行计算的,而在核电站实时风险管理系统Risk Moni- tor中,往往计算的是部件重要度,通常1个部件一般包括1个或多个基本事件,因而不能简单按照求解基本事件重要度的方法来进行。目前虽然有一些关于部件重要度的计算方法,但是均未得到广泛的认可。本文在分析了常用部件重要度计算方法基础上,引入了一种新的部件重要度即部件概率微分重要度CPDIM,该重要度主要基于微分重要度DIM,利用DIM的1个明显特性即可加性,来求解部件的概率微分重要度。通过实例证明该重要度可作为核电站关键风险部件选择的重要度依据。     

大型水利水电工程施工智能控制成套技术及应用

温控防裂、混凝土施工质量和基础质量控制是300 m级特高拱坝建设期重要的技术问题。传统质量管理依赖于从业人员专业素养与责任,无法满足精细化控制要求。本文基于"全面感知、真实分析和实时控制"的智能控制理念,结合大体积混凝土施工全过程和基础灌浆等智能控制技术,实现了高坝施工质量全过程的全天候、精细化、在线实时监控和预报、预警及智能控制;构建了业务协同平台i Dam,以大坝全景信息模型DIM为核心,解决了复杂环境条件下数据采集、海量数据条件下数据挖掘、多方参与条件下数据共享、本质质量条件下数据应用,为大坝施工过程各专业、各环节的精细化管理提供了有效手段,并为其工作性态的真实分析、实时预测、施工方案的动态调整与优化提供了支撑。     

基于ARM虚拟化扩展的Android内核动态度量方法

针对现阶段内核级攻击对Android系统完整性的威胁,提出一种基于ARM虚拟化扩展的Android内核动态度量方法DIMDroid。该方法利用ARM架构中的硬件辅助虚拟化技术,提供度量模块与被度量Android系统的隔离,首先通过分析在Android系统运行时影响内核完整性的因素从而得到静态和动态度量对象,其次在度量层对这些度量对象进行语义重构,最后对其进行完整性分析来判断Android内核是否受到攻击;同时通过基于硬件信任链的启动保护和基于内存隔离的运行时防护来保证DIMDroid自身安全。实验结果表明,DIMDroid能够及时发现破环Android内核完整性的rootkit,且该方法的性能损失在可接受范围内。