继电保护中多路模拟量采集系统的设计

介绍了一种基于高性能浮点DSP芯片TMS320C32、CPLD芯片XC95288和A/D采样芯片AD976组成的多路采集系统的工作原理以及设计方法。通过对第一路施加特殊的电压量,在CCS开发环境下读取采样缓冲区的值,并利用Matlab对采样数据进行了全波傅氏变换。此外,该系统已在继电保护中得到广泛应用,实践表明,该系统能较好地解决多路模拟量的采集,并确保了采样数据的安全可靠性。     

Collection efficiency of liquid‐based samplers for fungi in indoor air

This study assessed the collection efficiency (CE) of two popularly used sampling devices (BioSampler and Coriolis sampler) for fungal aerosols. Phosphate‐buffered saline (PBS) supplemented with or without surfactant (Tween‐20, Tween‐80, or Triton X‐100) and antifoam agent was prepared and used as collection liquids. The agar impactor (BioStage) was simultaneously operated with liquid‐based samplers to collect fungi from seven sites located at a university building, public library, and animal farming. Fungal concentrations determined by liquid samplers were divided by those by BioStage, and the ratio values represented CE. Results indicate that the CE of BioSampler was superior to that of Coriolis (P = 0.0001) and the PBS containing surfactant collected fungi better than that without surfactant (P < 0.0001), whereas antifoam agent showed no influence (P = 0.8). Moreover, fungal concentrations determined by BioSampler with surfactant‐added PBS were statistically indifferent from those by BioStage (P > 0.05) with a Spearman correlation coefficient of 0.81‐0.83 (P < 0.01). In addition to sampler and collection liquid, sampling location was also identified as a significant CE factor (P = 0.006), implying potential influences by fungal genera in the studied fields. Overall, BioSampler with surfactant‐supplemented PBS (eg, Triton X‐100) is recommended considering the great CE and compatibility with a variety of analytical assays.     

高温旋风除尘器的设计

在PTA(精对苯二甲酸)的生产过程中,工艺废气经尾气膨胀透平机降压后进入RTO蓄热式焚烧炉将有毒有害的有机物焚烧分解后排入大气,为了达到粉尘的排放标准(小于120mg/m~3),在焚烧炉之后加上这台高温烟气除尘器,废气经除尘后达到了排放标准,而且最大程度地减少了热量损失,实践证明此项改造是成功的。文章探讨如何进行高温烟气除尘器的设计,并介绍了高温多管陶瓷旋风烟气除尘器的结构。     

基于USB接口的数据采集系统

提出了一种基于USB接口,采用内置USB接口的微处理器芯片来实现的数据采集系统方案,并从硬件设计和软件开发两个方面对该方案进行了探讨。提出了3种硬件设计方案,并对其中一种方案进行了详细介绍；软件开发部分介绍了USB设备固件、USB设备驱动程序和数据采集系统应用程序设计。     

A Revised Methodology for Research on Metamemory: Pre-judgment Recall And Monitoring (PRAM).

A revised methodology is described for research on metacognitive monitoring, especially judgments of learning (JOLs), to investigate psychological processing that previously has been only hypothetical and unobservable. During data collection a new stage of recall occurs just prior to the JOL, so that during data analysis the items can be partitioned into subcategories to measure the degree of JOL accuracy in ways that are more analytic than was previously possible. A weighted-average combinatorial rule allows the component measures of JOL accuracy to be combined into the usual overall measure of metacognitive accuracy. An example using the revised methodology offers a new explanation for the delayed-JOL effect, in which delayed JOLs are more accurate than immediate JOLs for predicting recall. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

嵌入式Web服务器在中小水电信息采集系统中的应用

中小水电站大多数建在偏远山区，并网管理难度非常大，解决中小水电站的信息传输是主要的技术难点之一。随着计算机技术的发展，嵌入式Web服务器技术在远程监控和实时通信系统中的应用越来越广泛。将Web技术引入中小水电站信息采集系统中，可以实现对中小水电站基于浏览器方式的远程监控。文中结合中小水电站通信结构，介绍了嵌入式Web服务器技术在中小水电站信息采集系统中的应用。     

东方N-18250-2型凝汽器胶球清洗系统改造

对湘潭电厂存在已久的胶球清洗装置收球率低的问题进行了深入探讨，结合电厂对胶球清洗系统的改造、试验过程，分析并提出了影响胶球清洗装置清洗效果及收球率的诸多原因及其解决方法。     

采集太阳光的照明系统研究

简要介绍了欧美和日本在采集太阳光用于室内照明技术研究的进展及我国在研究开发全自动跟踪太阳的采光装置，攻克聚光、跟踪和传光等关键技术所取得的成果。指出研究全光谱利用，结合采光技术和光伏发电技术，达到代电和发电功能是进一步研究、发展的目标。     

3#大布袋收尘器更新改造方案的探讨

通过对3^#大布袋收尘器更新改造方案的对比分析，探讨适合工艺条件的最佳收尘器的选择途径。     

铜杆信息采集系统的研究

阐述了铜杆生产过程中信息采集系统的主要研究内容；概括了硬件的结构和选用的主要设备；阐述了上位机软件的主要模块及实现方法；系统采用面向对象的编程方法，界面友好，操作简单，功能完善；实际运行效果良好，具有较好的应用前景。