由无意识引发的思考

人们对于弗洛伊德的"无意识"理论中的意识和无意识已经研究了很多,但是关于前意识的研究却很少。本文从无意识入手并与唐纳德.A.诺曼的设计理论相结合,就前意识对设计的重要作用予以肯定并对提出唤醒前意识的方法。     

基于Web Service与元数据的空间信息发布研究与实践

在目前网络技术尤其是Internet技术迅速发展的同时,GIS技术得到了快速发展和广泛应用.如何有效地组织空『开J地理信息进行网上发布,是一个很有实际意义且具有挑战性的问题,在总结空间地理信息网上发布体系的相关发展技术后,提出了基于Web Service与元数据的空间地理信息发布的理论与方法并进行了实践.     

Urinary proteomic analysis of chronic allograft nephropathy

The pathogenesis of progressive renal allograft injury, which is termed chronic allograft nephropathy (CAN), remains obscure and is currently defined by histology. Prospective protocol-biopsy trials have demonstrated that clinical and standard laboratory tests are insufficiently sensitive indicators of the development and progression of CAN. The study aim was to determine if CAN could be characterized by urinary proteomic data and identify the proteins associated with disease. The urinary proteome of 75 renal transplant recipients and 20 healthy volunteers was analyzed using surface enhanced laser desorption and ionization MS. Patients could be classified into subgroups with normal histology and Banff CAN grades 2-3 with a sensitivity of 86% and a specificity of 92% by applying the classification algorithm Adaboost to urinary proteomic data. Several urinary proteins associated with advanced CAN were identified including α1-microglobulin, β2-microglobulin, prealbumin, and endorepellin, the antiangiogenic C-terminal fragment of perlecan. Increased urinary endorepellin was confirmed by ELISA and increased tissue expression of the endorepellin/perlecan ratio by immunofluoresence analysis of renal biopsies. In conclusion, analysis of urinary proteomic data has further characterized the more severe CAN grades and identified urinary endorepellin, as a potential biomarker of advanced CAN.     

The influence of lift frequency, lift duration and work experience on discomfort reporting

Discomfort surveys are commonly used to assess risk in the workplace and prioritize jobs for interventions before an injury or illness occurs. However, discomfort is a subjective measure and the relationship of discomfort to work-related factors is poorly understood. The objective of this study was to understand how reports of discomfort relate to work-related risk factors for the low back. A total of 12 novice and 12 experienced manual materials handlers performed repetitive, asymmetric lifts at different load levels and at six different lift frequencies throughout an 8-h exposure period. Discomfort was recorded hourly throughout the day. Analyses were performed to determine which experimental factors influenced reporting of discomfort and if discomfort trends matched spine loading trends. Novice lifters reported significantly higher discomfort levels than experienced subjects. They also reported increases in discomfort as moment exposure increased and as the exposure time increased. Novices lifting at 8 Nm load moment level reported increased discomfort from 0.07 to 0.63 by the end of the day, at 36 Nm they reported an increase from 0.04 to 0.40 and at 85 Nm they reported an increase from 0.37 to 3.06. Experienced subjects, on the other hand, reported low levels of discomfort regardless of moment exposure, lift frequency or exposure duration. The reported discomforts were generally unrelated to the biomechanical loading on the spine. Discomfort reporting appears to be more a reflection of experience than of work risk factor exposure. Experienced subjects may have more efficient motor patterns, which reduce spinal load and thus discomfort. Novice subjects seemed to have a lower threshold of discomfort. Caution is needed when using discomfort reporting as a means to identify jobs in need of interventions, in that biomechanical loading may not be accurately represented. Discomfort should only be used as a supplement to objective measures, such as spinal loading, to assess the risk of low back disorders.     

高性能BLAS在类Beowulf机群系统上的实现

Beowulf计划关于“基于COTS技术以满足特殊计算需要”的思想使得机群计算成为斋性能计算的一个重要流派,本文针对类Beowulf机群的Intel微处理器特点,讨论了BLAS的优化技术,在以软件DSM系统作为并行编程环境的类Beowulf机群系统上作出了性能评价。     

CORBA应用的连接管理技术研究

资源管理对于构造大型应用系统非常重要,其中连接管理是确保系统有效运行和负载均衡的关键。本文讨论了CORBA应用系统中的连接资源的管理问题,分析和研究不同的连接管理策略,对在应用级利用集线器实现连接资源管理进行了描述。     

ＡＴＭ承载IP的地址解析方法分析

地址解析方法的研究是ATM承载IP数据的主要研究课题之一。介绍了ATM承载IP数据的几种典型技术的地址解析过程,并对它们的解析结构、解析效率、解析功能等特性进行了比较分析。     

HTTP多路超链接在WebServers中的应用

频繁的WWW访问要求有有效的WebServers组织方式,针对HTTP超链接不能进行负载平衡的缺点,提出了HTTP多路超链接,并用HTTP超链接对HTTP多路超链接进行了模拟,最后将HTTP多路超链接引入WebServers设计。     

信息技术安全评价标准的现状和发展

讨论信息技术安全评价的标准的现状和发展,介绍世界各国制订的主要 标准的特点,重点分析信息技术安全评价标准的最新发展－ISO15408,简称CC标准。     

资源受限下多项目管理软件模型中任务的调度

首先分析了的项目管理软件以及项目管理研究中存在的一系列问题,然后给出了资源限制下多项目任务调度的数学描述,接着利用面向对象的方法,定义了任务对象,资源对象和调度对象,在调度对象中,给出用可自定义的多启发式的调度算法。