Acoustic emission monitoring of an eighteenth-century wardrobe to support a strategy for indoor climate management

The on-site monitoring of acoustic emission (AE) has allowed the direct tracing of climate-induced crack propagation in an eighteenth-century wardrobe displayed in the Gallery of Decorative Art in the National Museum in Krakow, Poland. The anti-correlation measuring scheme and frequency filtering allowed very low levels of physical damage to the wardrobe to be detected in spite of the high background noise typical of the museum environment. The total AE energy recorded during two years of monitoring corresponded to a fractured area of 12 mm² or a total crack propagation of 1.2 mm for two10-mm-thick panels. Although the total damage recorded was minute, correlation between the events of fracturing and falls in indoor relative humidity (RH) in winter due to insufficient humidification was evident. The risk of damage, expressed in terms of crack propagation, was quantified as a function of the magnitude of the RH falls of the duration compatible with the response time of the object. The data allow acceptable RH falls to be identified if a conservation professional or a curator selects a ‘tolerable’ yearly propagation of the fracture, in other words the progress of damage considered insignificant.     

澳大利亚义务教育质量监测体系的建立及对我国教育质量监测的启示

澳大利亚随着教育的改革和发展逐渐形成了义务教育国家基准,并建立起国家级义务教育质量监测项目。在介绍澳大利亚义务教育质量监测体系建立过程的基础上,总结其发展经验,以期为我国义务教育质量监测工作提供借鉴和参考。     

Using strategy instruction and confidence judgments to improve metacognitive monitoring

Current models of self-regulated learning emphasize the pervasive need for metacognitive monitoring skills at all phases of the learning process (Winne and Hadwin in Studying as self-regulated learning. In D. J. Hacker, J. Dunlosky, & A. C. Graesser (Eds.), Metacognition in educational theory and practice (pp. 227–304). Mahwah, NJ: Erlbaum, 1998). In this investigation, we examined the impact of teaching 5th grade students how to self-monitor their comprehension and make confidence judgments. One treatment class (N = 21) engaged in process-oriented comprehension monitoring training while the other (N = 24) engaged in both comprehension monitoring training and response-oriented monitoring accuracy training. Findings revealed that students in both treatment classes improved their calibration accuracy and showed higher confidence on test performance than students in two comparison classes (N = 47, N = 26) after 2 weeks of instruction. However, students in the monitoring accuracy training class also showed significant gains in overconfidence in comparison to those in the other three classes. Implications for integrating comprehension-monitoring training at the elementary school level are discussed.

基于Zigbee的建筑环境感控网络研究

为了对建筑环境中的信息进行监控,本文构建了基于Zig Bee协议的无线感控网络。通过无线传感网络技术与网络控制理论的结合,可使无线网络不但具有感知还有控制的能力。构建建筑环境无线感控网络架构,结合压缩感知技术,能够降低通信过程中的数据传输量。仿真结果表明,该方法适用于基于Zigbee的感控网络,并可以有效改善网络的性能。     

现代生物技术在环境领域的应用及展望

总结了近年来现代生物技术在环境领域的应用情况，着重介绍了现代生物技术在环境监测与评价、环境工程领域的新型实用成果，并就该技术在环境领域的应用前景和发展趋势进行了分析。     

基于VC~(++)社区视频监控系统的设计与实现

社区视频监控系统是以计算机为核心,结合多媒体技术、计算机网络技术的一种监控主机系统,本系统采用了软压缩的方法,在单机和对接线连成的两台电脑的情况下可以获得高清晰的图像,对其主机软件部分多路监视、动态监测和视频压缩、传输等模块的编程实现进行设计。     

异常流量短信分析监控系统的设计与实现

针对移动通信业务中短信的应用中,大量的非法短信、垃圾短信的传播对社会安定和用户情绪有着较大的影响。为了提高GSM的网络安全,本文介绍一种通过监控A口的网络信息,从而实现对本地用户和外地用户的短信流量以及短信内容进行监控的系统。     

构建高职高专全方位教学质量监控评价的主体与客体

教学质量监控、评价是高职高专学校教学管理的重要环节之一,它直接影响着学校教学管理水平和教学质量,全面体现学校对教学工作的导向作用.要提高教学质量和人才培养质量,必须建立科学的教学质量监控、评价体系.而构建科学的教学质量监控、评价体系,首先必须全方位地界定教学质量监控、评价的主体与客体.     

宜春学院校园噪声监测与评价

提高声环境质量是建设生态型校园的一项重要内容,采用TES-1350A型声级计,用等效连续A声级方法对宜眷学院校园内噪声进行监测。用环境噪声标准法和指数法分别评价校园噪声环境,分析存在噪声污染的主要区域。结果表明：宜春学院校园声环境整体较好,基本满足正常的教学、科研需要。在生活区、文娱活动区,噪声有一定的污染,晚上噪声污染更明显。     

选煤厂集中控制装置的监控系统设计

文章介绍了采用组态技术的选煤厂集中控制装置的监控系统的设计,该监控系统的组成包括硬件系统和软件系统,硬件分为上位机和下位机及集中控制装置;系统的软件分为上位机软件系统和下位机软件系统。上位机软件采用组态控制技术软件MCGS编制可视化监控管理程序,实现对选煤厂集中控制装置中各个设备的工作状态进行监控;下位机软件采用STEP 7编制控制装置的控制程序,对选煤厂集中控制装置既可以自动控制也可以手动控制。该监控系统增加了选煤厂集中控制装置的安全性,提高了可靠性及操作的灵活性,也方便了生产调度。