数字签名技术在医院电子病历中的设计与应用

为推进病历数字化发展,并确保其信息的安全性,将以HIS电子病历系统为基础,采用安信数字签名技术和PKI或PMI系统搭建相信并加以任用的授权服务,经过针对实际的PKC和CA的确认、委托与管控构建整体的数字签名平台,完成电子病历数字签名功能设计,以加强电子文件的完整性、真实性和不可抵赖性。最后以某医院的XML结构化的电子病历系统为基础进行项目实施,完成了医护人员通过HIS的快速身份认证,和准确地数字签名。     

Cost-based holistic twig joins

An evaluation of XML queries such as XQuery or XPath expressions represents a challenging task due to its complexity. Many algorithms have been introduced to cope with this problem. Some of them, called binary joins, evaluate separated parts of a query and subsequently merge intermediate results, while the others, called holistic twig joins, evaluate a query as a whole. Moreover, these algorithms also differ in what index data structure they use to handle XML data. There exist cost-based approaches utilizing binary joins and various index data structures; however, they share a limitation. The limitation is that they cannot perform a join between query nodes not having a direct XPath relationship. Such a join can be advantageous especially if their joint selectivity is high. Since holistic joins work with all query nodes they overcome this limitation. In this article, we introduce such a holistic twig join called CostTwigJoin. To the best of our knowledge, CostTwigJoin is the first holistic join capable of combining various index data structures during an evaluation of an XML query. Usage of the holistic join has yet another advantage for cost-based approaches: an optimizer does not have to resolve the order of binary joins; therefore, the search space is reduced. In this article, we perform thorough experiments on hundreds of queries to evaluate our approach and demonstrate its advantages.     

基于XML的信息物理融合系统组件建模与仿真

信息物理融合系统（CPS）涉及多种计算模型的集成和协同工作，针对CPS设计方法不统一、重塑性差、复杂度高、难以协同建模验证等问题，提出一种结构化、可描述行为的异元组件模型。首先，用统一组件建模方法进行建模，解决模型不开放问题；然后，用可扩展标记语言（XML）规范描述各类组件，解决不同计算模型描述语言不一致和不可扩展问题；最后，用多级开放组件模型的协同仿真验证方式进行仿真验证，解决验证的不可协同问题。通过通用组件建模方法、XML组件规范描述语言以及验证工具平台XModel对医用恒温箱进行了建模、描述和仿真。医用恒温箱的案例表明，这种模型驱动建立可重塑异元组件并确认其设计正确性的过程，支持信息物理协同设计和边构建边纠正，可避免在系统实现过程中发现问题时再进行反复修改。     

Adaptive–interpolative binarization with stroke preservation for restoration of faint characters in degraded documents

A novel technique for binarization with stroke preservation of faint characters in degraded documents is proposed. It works in a multi-scale framework with an adaptive–interpolative thresholding technique. Instead of computing a global threshold value, it computes the local threshold values for a small set of grid points by observing the intensity pattern of the pixels lying in the concerned grid cells. Estimated thresholds are used, in turn, to compute the threshold values of all the remaining pixels using a fast-yet-efficient interpolation procedure. To handle noises in degraded images, this grid-based adaptive thresholding is applied in successively reducing scales to obtain the near-optimal binarization as a set of connected components. After a post-processing meant for stroke preservation with these connected components, we get the final output. Exhaustive experimentation and comparison with other existing methods have been successfully carried out with benchmark datasets and also with our own datasets.     

大中型往复式压缩机采购过程中的质量控制

大中型往复式压缩机是化工建设项目中的关键采购设备之一,笔者提出了技术数据表审查、制造商及用户考察、技术方案论证、技术协议签订、图纸方案审查和制造质量检验验收等采购流程中各环节技术要求和质量控制要点,为化工工程建设同类设备的采购提供参考。     

建筑工程资料存在的问题与对策

就工程资料的管理，收集，归档各环节存在的一些普遍问题，通过分析问题产生的原因，提出了相应的解决措施，指出工程资料真实，准确，规范，才能确保工程质量有据可查。     

浅谈实验室管理体系文件化的新方式

文件化的管理体系是实验室按照相关标准和准则有效运行的纲领和证据,然而随着实验室信息管理系统(LIMS)的飞速发展和广泛应用,传统的质量手册、程序文件和记录表格等文件化的管理体系方式也伴随着新的信息管理体系模式发生新的变化。认可与检验检测行业实验室管理体系文件化方式的进行探索,并由此对未来实验室管理体系文件化的发展提出建议。     

基于NLP的工程伦理教育研究文献挖掘与分析

工程伦理教育是高等工程教育改革的重要一环。在"新工科"建设背景下，学界又掀起了工程伦理教育研究的热潮。基于自然语言处理技术（NLP），借助计量可视化工具，针对中国知网（CNKI）收录的212篇研究性文献，从文献关键词时间分布图、词频表、词云图、LDA主题聚类表等角度出发，开展机器学习环境下的工程伦理教育研究文献挖掘与分析，分析中国工程伦理教育的研究现状、理论基础和研究热点，指出目前工程伦理教育存在的问题，并从高校角度提出一些改进建议，为促进工程伦理教育提供了有效参考。     

XML在产品数据管理(PDM)系统中的应用

概述了PDM系统的主要功能,并介绍了XML技术及其特点.通过对PDM系统所面临的问题以及XML的几个关键技术的讨论,阐述了XML在PDM中的应用,并提出了基于XML的PDM系统的体系结构.     

浅谈投标过程中的投标决策

介绍了投标过程中的注意事项,从资格预审阶段、投标阶段、组织投标阶段等方面进行了论述,指出投标决策是贯穿于整个投标竞争的全过程,只有对各主要环节作出正确的决策,才能取得竞争的全胜。