挤压造粒机在生产高熔指聚丙烯产品中的优化

聚丙烯装置CMP387型挤压造粒机在生产高熔融指数的聚丙烯时容易出现缠刀、垫刀、拖尾、灌肠等问题，文章结合挤压机在不同熔融指数产品的运行工况，优化开车参数及开车方法，在挤压造粒机入口增加开车粉料罐。以上措施顺利解决了生产高熔融指数产品过程中挤压造粒机异常停车后重新开车的难题，确保挤压造粒系统顺利的运行。     

聚丙烯挤压造粒机离合器故障处理

聚丙烯挤压造粒机停车更换滤网后,在开车过程中多次出现离合器速度差联锁,离合器无法正常离合,挤压造粒机无法启动,处理离合器无法正常离合故障。     

探究分子筛纯化系统常见故障分析与处理

针对分子筛纯化系统在运行过程中可能出现的操作故障、分子筛泄露故障、空气压力波动故障、控制程序故障、切换阀故障进行分析,并且分别阐述处理方案,提高分子筛纯化系统运行稳定性,为今后空分设备检修与故障处理提供参考。     

降低空压机电机温度及振动的研究与运用

攀钢发电厂空压机电机在运行过程中频繁出现振动大、轴承温度超高报警、轴承频繁损坏等故障,采用增加电机散热通流量、调整系统运行压力、轴承改型等方式,有效解决了空压机电机本体运行温度高和轴承超温运行故障频繁的问题。     

乙烯产品外送泵故障分析及改进

乙烯产品外送泵是乙烯装置与下游装置之间的重要输送设备。某乙烯产品外送泵在乙烯装置开车运行不足1个月，出现振动上升超标、出口压力下降等异常现象，无法满足生产需要。针对泵体在检修中发现的泵内部口环、滑动轴承磨损严重等问题，分析产生乙烯外送泵故障的各种可能原因，提出泵的改进办法，延长泵的运行寿命。     

聚酯装置罗茨风机典型故障分析及维修处理

本文针对聚酯装置2台罗茨风机在日常运行过程中出现的典型故障,分析故障原因,总结维护维修经验,采取有效措施排除故障,保障设备的稳定运行。     

煤矿电气控制电路的检修方法

在煤矿作业过程中,电气控制电路常出现一些故障,影响煤矿正常作业。如电路断路故障、短路故障、连接故障以及参数匹配故障等,对煤矿作业造成不利影响。可以根据煤矿电气运行的特点,确定故障位置,找出故障原因,选择有效的检修方法解决故障问题,确保企业的正常运行。本文主要阐述了煤矿电气控制电路的检修方法,以期作为煤矿电气检修工作的参考资料。     

ZW-64/18型氮压机故障分析及处理

KDON(Ar)-10000/3600/320型空分设备,有两台Z W-64/18型氮压机,系开封东京空分制造的3级4列活塞式压缩机。2014年10月因烧瓦停机检修后,再次开车又出现故障,经过多次检修,直至11月才运行正常。1.故障现象正在运行的2号氮压机突然联锁停车,现场可见氮压机呼吸孔往外冒烟,DCS上查到油压<0.18 MPa辅助油泵跳起,油压     

锅炉风机运行中常见故障的原因分析及处理

在锅炉风机运行的过程中,由于长期的运行就会导致零部件出现一定的磨损老化的现象,故障问题会在不同程度上影响锅炉风机的正常运作。锅炉风机常见的故障有以下几点:地面螺栓的折断,叶片的非工作面积出现大量的积灰或者是引风机的振动出现了问题;另外,锅炉风机润滑的不足,轴承出现异常等问题,都有可能导致锅炉风机轴承的温度不断升高,从而加剧轴承的磨损和老化。这些在锅炉风机正常运行中出现的问题都会影响到锅炉风机的使用。所以文章就此现象,对锅炉风机运行中常见的故障问题进行综合分析,保证锅炉风机的正常运作,在深入解析故障原因的基础上采用合理的措施,从而减少锅炉风机运行中出现故障对生产作业带来的不利影响。     

化工设备故障分析及其预防维修措施研究

化工设备在实际的运行过程中,由于设备自身老化或人为操作失误等原因,会导致很多设备故障的出现。对设备故障进行及时地预防和维修,能在很大程度上保证化工企业的正常运行。下面,本文就在分析化工设备故障出现原因的基础上,对其预防和维修措施进行具体阐述。     

Divergent patterns of engagement in Internet standardization: Japan,Korea and China

This article analyzes the engagement of Japanese, Korean and Chinese participants in the development of Internet standards at IETF on the basis of four quantitative metrics: attendance, patenting, authorship and leadership. The results are strikingly divergent. Japanese involvement in Internet standardization began early and Japan was, for many years, second only to the U.S. in terms of IETF participation. Though Japanese participation has declined since the early 2000s, Japan remains a major contributor to IETF standardization. Korean involvement in IETF has always been significant, but below the levels of Japan and major European countries. Korean participation in IETF has also declined over the past decade, and has been dominated by one firm, Samsung. Though meaningful Chinese involvement in IETF did not begin until the mid-2000s, it has rapidly expanded in recent years. Today, China is a major player in numerous areas of Internet standardization in terms of three metrics (participation, patenting and leadership), and is rapidly gaining in terms of document authorship as well. Most of China׳s recent IETF involvement can be attributed to Huawei, though other Chinese firms have recently begun to increase their participation in the organization. Thus, contrary to some views that China׳s engagement with standardization is primarily one of indigenous innovation and “catching up”, China׳s experience with IETF demonstrates deliberate and effective engagement with a major Western standards-development organization on its own terms.     

Whose Image is it Anyway?: Some Considerations of the Curricular Importance of Subject Image in Secondary School Design and Technology Education

This paper explores the idea that a sense of school subject image is a necessary feature of curriculum management and a potent force for change. The discussion centres on the view that all school subjects have an image and that if those intimately involved with the subject do not control the image then someone else does! In such circumstances the image is the product of past encounters and old euphemisms and is unlikely to hold the changed realities.The UK developments in Design and Technology education (the term Design and Technology is used to denote the school subject defined under this heading by the UK National Curriculum, 1995) have created something of an image problem which has interesting international parallels. Some of these problems are due to clearly discernible internal tensions and an ambiguous relationship with other subject areas.Through greater attention to subject image internal controversies might be acknowledged and resolved, relationships with other subject areas can be more meaningfully understood and practitioners can be helped to make sense of curriculum change.     

蒸汽热量计量应用的探析

研究了石油化工企业的燕汽计量情况,着重对蒸汽热量计量的合理性进行了分析,阐述了蒸汽热量计量的依据及计算方法,以及蒸气热量计量对节能降耗的重要意义.     

论传统旗袍文化与现代时装

中国的旗袍文化蕴含着非常丰富的文化内涵和设计思想,如今旗袍的普及受到一定的限制,只有经过改良,才可变局限性为可行性,才可使旗袍焕发青春,走向新时代。     

望峰岗矿井贯通测量技术分析

在深部开采矿井两井间贯通测量时,利用加测陀螺定向边和用四架法代替传统的三架法测量,分析了由起始边的方位角误差引起的支导线终点误差及由测角量边引起的导线终点的点位误差.     

工程施工质量控制和管理要点

提高施工中质量管理工作水平，为公司今后发展打下良好基础。     

高油价影响我国经济

从2004年初以来，国际油价急剧攀升，文章分析了原油价格居高不下的原因，对未来油价的走势及其对我国经济的影响和冲击进行了预测，面对这种情况我国必须采取应对措施：树立节能消费理念；促进技术创新，推动产业升级；建立石油战略储备、推出原油期货、推动多元化战略等。     

亲油性纤维材料性能及应用

纤维素纤维是自然界广泛分布的天然纤维,像法桐球果纤维、木棉纤维、杨花纤维、蒲公英绒纤维,都是纤维素纤维,纤维具有吸油快、吸油量大、拒水的性能特点,纤维不易进行纺织生产加工,但可以作为海面吸油材料使用,并且加工方法简单,吸油效果好。     

Optimizing receiver performance using harm claim thresholds

More and more systems need to be squeezed together in frequency, space and time in order to satisfy the growth in demand for radio services. However, greater proximity increases the risk of service breakdowns caused both by poor interference tolerance in receivers and by inappropriate signals radiated by transmitters.     

Broadband expectations and the convergence of ranks

Broadband Internet service to widely held to be a significant contributor to economic development and global competitiveness, and comparison of adoption rates across countries are common. This paper presents evidence that the relative broadband Internet adoption ranks across the Organisation for Economic Co-Operation and Development (“OECD”) countries are converging to the wireline telephone adoption ranks in the mid 1990s. This was a time when wireline telephone service had reached maturity, but before consumers began to abandon traditional telephone services for mobile services and Internet telephone technologies. As such, in the absence of better data on household adoption, wireline telephone rank is a useful proxy for a country's ultimate fixed-line broadband penetration rank. Having such an educated guess available regarding broadband rank should reduce the amount of anxiety over rankings, since similar rankings across the two services implies suitable broadband performance. Large departures, alternately, may be a cause for concern or delight. Like prior analyses, the findings suggest that the adoption of communications services is largely an economic and demographic issue.