热轧1700线隆起、亮带的成因及解决方法

通过对本钢1700热轧线供冷轧原料隆起、亮带缺陷的原因分析、确定。采取多项工艺、生产管理措施及设备维护方面的改进,大量减少了供冷轧原料亮带、隆起的缺陷。提高了冷轧料的成材率,减少了冷轧料的退废和退料。     

大型火电机组大修周期延长后热控检修策略研究

针对广东省内发电企业开始对火电机组检修周期进行优化,延长大修周期以节约成本费用的形势,根据大型火电机组热控系统的运行维护特性,结合国内部分大型电厂的调研情况,提出延长火电机组检修周期后,热控主要系统和设备的检修策略和工作要点,使机组大修周期从4年延长到6年或更长时间后,热控系统和装置能保持可靠运行,同时减少检修成本。     

浅析建筑节能

建筑节能指采用节能型的技术、工艺、设备、材料和产品,提高保温隔热性能和采暖供热、空调制冷制热系统效率,加强建筑物用能系统的运行管理,也可利用可再生能源,在保证室内热环境质量的前提下,减少供热、空调制冷制热、照明、热水供应的能耗。     

“一拉热”和“摇摇冰”

人们冬天时想吃得热一些,夏天时想喝得冷一些,于是发明了微波炉、冰箱等设备,但这些设备太大,不方便携带。现在就有了一拉就会热的食品,摇一摇就会冷的食品,非常方便,也非     

高效燃料电池涡轮机

美国能源部委托西门子西屋公司开发出将燃料电池和燃气涡轮机结合在一起的发电设备 ,这种设备能大大提高发电效率、减少环境污染。新设备中的燃料电池由１１５２个陶瓷管构成 ,燃气涡轮机则利用燃料电池产生的热废气进行二次发电。新型发电设备的发电功率为２２０千瓦 ,能为２００户家庭供电。其发电效率达到５５ % ,远远高于燃煤发电设备３５ %的发电效率 ,也高于燃气涡轮机５０ %的发电效率。高效燃料电池涡轮机     

现代石化企业设备养护工作的重点

石化企业的设备养护工作是关系到企业设备运行安全的关键,是关系到石化企业员工人身安全的关键.通过科学的设备养护能够有效减少设备故障的发生、减少设备抢修情况的发生,为保障石化产品质量、保障石化设备安全奠定基础.本文就现代石化企业设备养护工作的重点进行了简要论述.     

高校餐厅供热系统冷凝水回收再利用的实践与体会

各高校餐饮部门在加工制作饭菜时,常用的加热方法之一就是使用蒸汽加热,而使用蒸汽加热首先必须有产生蒸汽的锅炉及用热设备,包括各种夹层锅、蒸箱和汽水换热器等,而锅炉产生的蒸汽及用热设备在使用的过程中被冷凝成了冷凝水。     

新一代 IP 网络设备高可靠性备份技术

随着 IP 网络承载业务的不断丰富,网络接入业务高可靠性成为关键需求。为达到电信级可靠性要求,用户接入网关设备高的可靠性保证成为关键。通过系统研究用户网关电信级可靠性保证方案,包括端口级/单板级/设备级 1+1、N+1、N+M 备份方案,设计基于二层网络的冗余检测备份协议（L2SP）与用户网关业务的热备份机制,解决用户典型接入协议（PPPOE/802.1X/DHCP）设备间用户信息与业务状态热备份难题,使设备在一年的连续运行中因各种可能原因造成的停机维护时间少于 5 分钟,达成网络设备 99.999%的高可用性目标。相较于传统设备级不带用户业务热备的可靠性方案,可靠性能力提升 50%以上。     

热质交换原理与设备课程的教学改革实践

热质交换原理与设备课程是一门专业基础课,本文通过对课程的教学改革和实践,提出了从优化整合教学内容、课堂教学与工程实践相结合以培养学生工程应用的概念、实验教学环节的改革、完善课程考核方法和教学与科研相结合培养学生创新思维等方面进行了一系列的教学改革,探索了热质交换原理与设备课程教学改革的新思路。     

汽包全充水启动在锅炉启动中的应用与探讨

汽包是锅炉设备在运行过程中加热、蒸发、过热的中心枢纽,在机组故障状态或调峰机组锅炉的热态启停时,操作不当很容易造成汽包上下壁任意两点之间的温差大于40℃。汽包全充水启停操作方法可以有效地减缓机组故障状态或调峰机组锅炉的热态启停时对锅炉设备的损害,预防事故。     

多媒体计算机图像数据的压缩技术

多媒体计算机的图像数据压缩技术是多媒体计算机的关键技术之一，本对多媒体图像数据压缩的可行性进行了分析，并给出多媒体图像数据的五种压缩方法．     

基于压缩感知的电能质量信号重构算法研究

为解决传统电能质量信号在采样时面临的采样率高,采样资源浪费和硬件成本高的问题,压缩感知理论被引入到电能质量信号的采样与重构过程。信号的稀疏表示是压缩感知理论中的关键问题,一般选择正交基作为压缩感知中的稀疏变换基。基于多重扰动的电能质量信号,本文提出了基于不同干扰的电能质量模型来选择不同的信号稀疏变换基的压缩感知重构算法。实验证明与整个信号采用单一DCT变换基或FFT变换基的压缩感知重构算法相比,本文提出的方法具有更好的信号重构性能。     

USING COMPRESSED SPEECH TO MEASURE SIMULTANEOUS PROCESSING IN PERSONS WITH AND WITHOUT VISUAL IMPAIRMENT

This study investigated the use of compressed speech as a modality for assessment of the simultaneous processing function for participants with visual impairment. A 24‐item compressed speech test was created using a sound editing program to randomly remove sound elements from aural stimuli, holding pitch constant, with the objective to emulate the effect of incomplete visual stimuli in gestalt closure tests assessing simultaneous processing. The participant sample included 26 college students with impaired vision and a comparison sample of 88 sighted college students. Participants completed the compressed speech on a computer, along with a general ability measure and standard scales of neuropsychological function. The compressed speech test had a statistically significant positive relationship with both of the scales associated with the simultaneous processing function. Results suggest that compressed speech may provide a viable alternative to assess the simultaneous processing function, equitable for use with persons with and without visual disability.     

基于BWC的XML文本数据索引技术研究

在XML文档中,相当大的部分是由文本数据组成的,针对XML文本数据占用空间较大、对压缩文本数据有效搜索效率较低的难点,基于BWC提出了压缩XML文本数据索引的技术,通过构造全文本数据模型,并利用整体压缩自索引存储XML文档的文本数据,实验结果表明,该技术不仅有效支持XPath查询语言文本搜索,而且内存消耗相对较小,实现了中小规模数据的内存搜索.     

Eye Movements of Children in Reading English and Hebrew

Time-compressed, tape recorded messages were used to determine if listening to the message twice, in the same amount of time required to listen to the uncompressed message once, would improve listening comprehension scores of high and low aptitude men. The results indicated that for both groups of subjects, listening to the compressed messages twice improved comprehension scores over scores obtained by listening to the compressed tapes once. Comprehension of repeated time compressed messages was not improved over that obtained by a single listening to the uncompressed messages.     

钢管混凝土偏压构件受力性能实验分析

通过 2 5根钢管混凝土偏心受压短柱的实验 ,结果表明 ,偏心率对钢管混凝土偏压构件受力性能的影响最为显著     

基于线性四叉树压缩算法的研究与改进

在线性四叉树压缩算法分析研究的基础上,对其压缩过程中的2个步骤进行了改进,并给出了改进后的压缩和解压缩算法。通过对比改进前后的算法表明,改进后的算法在压缩时间和数据压缩率上都有显著改善。     

Student Preference Rates for Predominately Online,Compressed, or Traditionally Taught University Courses

Universities and colleges in the United States are actively searching for new ways to increase student enrollment as one means to offset recent government budget cuts in educational funding. One proposal at a particular institution involves transitioning a commuter university from a traditional semester length calendar to one that offers predominately online and compressed courses. University students responded to a survey, based on a number of variables, regarding their impressions of taking considerably more online and compressed courses in lieu of traditionally taught courses. While the students wanted to keep the traditional semester calendar, findings showed that some of the benefits of online and compressed teaching schedules were appealing.     

气动绞车在煤矿的使用方法研究

JQHS-50×12型气动绞车是以气动马达为动力的绞车装置,它将气能转换成机械能进行运转,具有转速、低扭矩大、结构紧凑、操作方便、工作安全可靠、维修简单、运转平稳、无级变速、安全稳定、降低劳动强度等特点。     

The effects of reading practice with compressed speech on reading rate and listening comprehension

Conclusions Reading practice with accompanying compressed speech as a pacer resulted in a significantly greater increase in reading rate without an accompanying loss in comprehension for the experimental group when compared with the control group. Scores on the delayed posttest seemed to indicate that the increase in reading rate was more than temporary. The significant increase in reading rate was accomplished with only 10 practice sessions. The number of sessions in earlier studies using pacers ranged from 16 (Marvel, 1959) to 50 (Wilson & Leavell, 1956). The present study suggests that a smaller number of sessions using compressed speech as a pacer can be effective in increasing reading rate. Since there was no significant difference between gain scores for the experimental and control groups for listening, this study provided no evidence to support the use of practice with compressed speech to improve listening ability. It might be noted however that the training sessions consisted of reading short storieswhile listening to the compressed speech. Thus, subjects did not receive practice in which listening to compressed speech was the sole activity. It is perhaps for this reason that the experimental group did not improve more in listening than did the control group. This article is based in part on Thameśs masteŕs thesis which was completed at the University of Wisconsin-Milwaukee.