设备振动监测判据及应用

简述了设备振动监测的原理，阐述了设备振动监测点设置的原则，论述了正确制定设备振动监测判据的重要意义。详细论述了三大设备振动监测判据：绝对判据，相对判据和类比判据及其在实践中的应用，并对基于振动分析的设备故障诊断规律作了一些探索。     

D—2800抽风机振动检测频率分析

根据抽风机产生的振动，找出判断故障的依据，利用振动测量分析仪进行分析，及时处理设备隐患，提高设备作业率。     

连退炉FCS10号炉辊故障分析

通过振动分析仪对炉辊轴承座进行振动监测，分析振动特征，利用频谱分析找出炉辊振动异常的原因，避免突发事故发生，确保设备的安全运行。     

设备诊断中的振动测试技术

本文主要围绕设备诊断中的振动测试技术，结合作者本人工作实践，具体介绍了振动测试的基本概念和基本内容、建立设备诊断档案，判断标准的收集和制定、振动测试仪器的使用维护等有关内容。     

HY-103型便携式测振仪在发电设备上的应用

通过HY-103型便携式测振仪对旋转设备的振动进行测量，对所得到的位移（峰-峰值）、速度（真有效值）、加速度（峰值）三个参数进行计算，得出振动的主频率，从而对设备的振动故障进行诊断。     

旋转机械状态监测和故障诊断

旋转机械在线监测与故障诊断系统用于监测设备的振动、温度和压力等工艺参数的变化，掌握设备的工作状态，分析设备故障原因，指导设备工程师对于设备故障做到“防患于未然”和“心中有数”，保证设备运行的可靠性。监测精密加工设备的振动，当工件或刀具出现异常情况时，及时提示，保证工件加工精度，减小报废率。     

制氧机组氧压机传动系统故障诊断分析

通过对重钢1号1.8万m^3制氧机组2号氧压机传动系统的振动监测，运用振动理论，采用振动频域分析方法，对振动信息进行时域和频谱分析，初步确定了传动系统异常振动的原因，为设备检修提供了科学依据。     

降低卡尔多炉炉体振动的有效措施研究

文章介绍了卡尔多炉炉体主要组成部件及运行中出现的问题，对炉体振动偏大的原因进行了分析，针对主要造成炉体振动偏大的因素，制定优化及应对措施后，卡尔多炉炉体振动现象明显降低，炉体故障率大幅下降，延长了设备备件使用寿命，降低了检修费用，保障了设备的安全稳定运行。     

大型烧结风机的找正与动平衡

大型烧结风机的找正与动平衡朱彦台，王继喜（莱芜钢铁总厂）关键词烧结风机；转子静态找正；动态平衡风机在运行过程中不可避免地会产生振动，剧烈的振动常常会造成设备的故障停机，甚至造成设备事故。因此，控制和减少风机振动，是风机安全运行的基础。引起风机振动的主...     

频谱分析诊断电机和风机振动

本文简述了频谱分析的原理及设备振动测量基本知识，通过典型故障频谱结合焦化厂380kW电机振动和炼钢厂630kW风机振动进行诊断的实例，说明了掌握频谱分析技术对保证水钢重点设备准确维修的意义。     

往复式空气压缩机故障振动诊断(续)

往复式空气压缩机的振动是其主要故障标志之一,通过振动分析仪器对空压机的常见故障进行采集分析,可以有效地降低设备故障率,实现状态监测和预知维修.     

锅炉转机运行故障的基本判断方法和处理

结合典型实例介绍了运行中判断锅炉给水泵、风机等转动机械故障的基本分析方法和处理方法，亦即根据运行中转动机械的故障主特征，检查寻找设备故障运行中表面的其它现象，来确定故障部位、原因并处理。对专业技术人员和值班人员判断并防止扩大转机故障、减少损失、正确及时地处理故障具有现实指导意义。     

Practical aspects of quality control for radioimmunoassays

Mechanisms for the quality control of radioimmunoassays are described. They are useful in monitoring the possible sources of error which cause medically invalid results: errors in the radioimmunoassay system itself, in the test environment, in the instrumentation, and in the specimen quality. The application of a total control program permits early detection of malfunctions and can be used for the logical assessment of probable causes and solutions.     

脱水型陶瓷过滤机的常见故障与解决办法

陶瓷过滤机是目前国内较为新型的固液分离设备。结合秦岭公司陶瓷过滤机在使用过程中的定期点检,分析了常见故障以及故障的解决方法。深入地探讨了陶瓷过滤机的操作使用与维护,可为设备维修人员更好地维护、管理陶瓷过滤机提供参考。     

VD控制系统改造

VD真空精炼炉主要是用来生产重轨、钢帘线等高附加值的钢种.原VD炉控制系统自动化程度不高,且经常出现故障.此次改造重新设计了自动控制系统,实现了VD炉的全自动运行,提高了控制系统的自动化程度,缩短了抽真空时间,减少了蒸汽的耗量.     

Toxin entry: retrograde transport through the secretory pathway

Behavior modification in rats often involves controlling the frequency of providing food rewards. This is accomplished with computer-controlled devices or equipment purchased specifically for this purpose. Investigators currently choose from a few commercially available models, but each has its disadvantages or limitations, including a high cost (about US$1000). Computer-controlled devices can also be expensive and need a dedicated machine and software packages to perform the tasks. We designed a custom-built device to reward an action randomly from 1 out of 10 times to 10 out of 10 times. The device can be manufactured easily and inexpensively (about US$150). It has been in use for several months in our laboratories with no malfunctions.     

振动监测及诊断在高炉鼓风机上的应用

详述了应用振动监测技术对高炉鼓风机运行状况进行监测 ,根据监测数据对其存在的故障进行分析诊断 ,并依诊断结论确定改善方案。运用设备振动监测及诊断技术 ,达到高炉鼓风机运行状态最佳化。     

叶片泵常见故障及分析

针对液压设备的故障,以液压泵的主要品种叶片泵作为阐述对象,分析其产生故障的原因,并提出一些解决措施。     

转炉余热锅炉的应用技巧

转炉余热锅炉在转炉生产中起着十分重要的作用，本文结合我厂120吨转炉余热锅炉运行18个月的经验。从实际操作要领到工况调整的分析，总结出转炉余热锅炉的应用技巧。     

Maternal shunt dependency: implications for obstetric care, neurosurgical management, and pregnancy outcomes and a review of selected literature

OBJECTIVE: Because more women with cerebrospinal fluid shunts are surviving to child-bearing age, neurosurgeons, obstetricians, and other health care professionals require information about the care of these patients, especially during pregnancy and delivery. The purpose of this study was to gather comprehensive data from women with shunts regarding their clinical histories during and immediately after pregnancy. The following questions were addressed. 1) How does maternal shunt dependency influence the course of pregnancies and pregnancy outcomes? 2) What neurosurgical complications characterize this population of patients? 3) What complications of shunt dependency influence obstetric management, including prenatal testing and delivery? METHODS: A total of 37 respondents (age, 18-41 yr), accounting for 77 pregnancies, completed a questionnaire providing information on maternal background and medical history, shunt performance during pregnancy, management of delivery, pregnancy outcomes, and unusual complications. RESULTS: Fifty-six pregnancies resulted in live births; of these, 47 occurred in women with ventriculoperitoneal shunts. Three women underwent therapeutic abortions, 1 experienced preterm delivery, and 8 experienced 17 miscarriages. Four women experienced seizures during pregnancy, five reported third-trimester headaches, and eight described abdominal pains during the first and third trimesters. Four babies were diagnosed as having congenital defects. Shunt malfunctions and revisions occurred 10 times in 7 women, either during pregnancy or within 6 months after delivery. No acute malfunctions occurred during delivery. Forty-seven cases, representing 84% of all pregnancies, exhibited no shunt malfunctions or revisions. CONCLUSION: This study extends previous observations to a larger population of shunt-dependent mothers. The results suggest that maternal shunt dependency entails a relatively high incidence of complications but that proper care of these patients can lead to normal pregnancies and deliveries.