碱性锌锰电池封口新结构

本文作者研制了一种碱性锌锰电池的封口结构。经过电池的生产和长时间的贮存试验证实此种封口结构可以有效地防止电池泄漏。     

抗干扰鲁棒自适应算法

在系统存在有界干扰的情况下,本文对σ—修正适应算法做了推广和改进,提出用模型信号的持续激励减小输出误差的收敛域,并给出激励度应满足的充分条件.改进适应算法可提高控制精度,有较强的鲁棒性.     

The Effect of Additives on Cu/HZSM-5 Catalyst for DME Synthesis

The addition of ZnO or ZrO₂ into CuO/HZSM-5 was investigated for DME synthesis from syngas by using the reactive frontal chromatography method, TPR and in situ TPR. These promoters enhanced the catalytic activity of Cu/HZSM-5 and promotion with ZnO and ZrO₂ produced a maximum activity, which could be explained by the improvement of the dispersion of Cu and the promotion of CuO reduction. The Cu⁺ species existing during the reaction have been detected, based on which a Cu⁰ Cu⁺¹ redox cycle model was put forward.     

计算机智能语音广告监播系统的设计与实现

如何使用自动化的手段监测广告,已经成为广告监测行业的重要课题。本文在分析现有的语音识别方法、算法的基础上,针对语音广告的识别特点和要求以及广告监测的需求,设计和实现了一整套的、包括软硬件在内的广告自动监播系统。     

电子商务网络安全技术分析

电子商务网络安全是电子商务成功与否的决定性因素,它决定着一个电子商务网站是否可以为用户提供安全可靠的交易服务,本文对电子商务网络安全的实现技术逐一进行了介绍和分析,为研究和实施电子商务的安全提供借鉴和参考。     

Development of a shortened center for epidemiological studies depression scale for assessment of depression in rheumatoid arthritis.

Objective: The purpose was to develop a short-form version of the Center for Epidemiologic Studies Depression Scale (CES-D) for the identification of persons with major depressive disorder (MDD) within a population with rheumatoid arthritis (RA). Study Design: Data were analyzed from 337 persons with RA. Forty-six participants met the diagnostic criteria for MDD; 291 participants were classified in the non-MDD category (including 21 participants with dysthymia and 18 participants with minor depressive disorder). A short-form version of the CES-D was developed, and multiple cutoff scores were examined. Results: A cutoff score of ≥5 from a 9-item, short-form CES-D was found to be generally as efficient as the more commonly used full-scale cutoff score of ≥16 for classifying participants with MDD within an RA population. Although the shortened CES-D scale (cutoff score ≥5) was slightly more sensitive, it also exhibited slightly less specificity than the full-scale cutoff score of ≥16. Conclusion: The results suggest that a short-form CES-D can be used to screen for MDD within an RA sample with a degree of efficiency that is generally comparable to that of the full-scale instrument. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

消息中间件在高速铁路综合调度系统中的应用

消息中闻件作为高速铁路综合调度仿真系统各子系统闻的接口信息处理系统发挥着重要作用。文章从消息中问件在系统中的位置、发挥的作用、工作的原理和过程等方面详细介绍了其在高速铁路综合调度仿真系统中的应用。     

基于PCI卡的DSP系统在线加载方法的研究

概述了以DSP为核心的一般逻辑系统。结合实例详细介绍了基于PCI卡的DSP系统在线加栽电路的硬件设计和程序在线加栽技术，该技术具有较大的可扩展性，可广泛应用于基于网络的，以DSP作为核心处理器的各种电子设备中。     

基于嵌入式Web服务器的网络视频实验系统

网络技术的发展为实验教学创设了广阔的前景，结合目前成熟的多种通信技术，对远程网络实验教学有重要的推动作用。本文给出了一种嵌入式Web服务器的软硬件设计原理，并通过该服务器组成了远程网络视频实验系统。     

星链ER模型:一种数据仓库概念设计模型

对于流程工业中的数据仓库建设，存在一贯性质量分析的需求，即前一个工序的工艺可能影响下一个工序的产品质量．针对这种需求，提出了一种数据仓库的概念设计模型，星链ER模型．其中引入了链式事实主题结构的概念，并把度量细分为传递型度量与非传递型度量，给出了星链ER模型的图形表示法以及由概念模型到逻辑模型的转换规则．该模型可以方便地转化成多种逻辑模型如星型模式、雪花模式以及星座模式．