玛湖油田转油泵频繁气蚀机理分析与处理对策

对玛湖油田转油站转油泵频繁气蚀的原因进行调查,分析气蚀机理并采取相应措施处理,避免事故发生,确保原油转输工作正常进行。针对故障原因采取应对措施并应用联锁保护技术,解决了转油泵频繁气蚀问题。在转油站设计时为避免泵供液不足问题的发生,在离心泵参数与管道直径设计时应留有较大的余量。     

活塞氧压机润滑油系统故障分析及处理

活塞氧压机正常运行中由于油泵出口油压安全阀工作不稳定,造成油压逐渐降低的故障,运行中,由于齿轮油泵轴端密封泄漏,造成混入空气的润滑油起泡沫。分析故障原因,更换油压安全阀和齿轮油泵,故障排除。     

费森尤斯4008S型血透机常见水路故障的分析与维修

血透机承担血液透析工作，费森尤斯4008S型血透机应用较为普遍，但其水路故障会造成设备运转不畅。从常见的水路故障角度探讨故障表现及维修措施，以及时发现故障并有效解决，提高维修效率，保障设备安全运行和血透顺利实施。     

C8013B车轮车床液压故障分析与处理

C8013B车轮车床是加工机车轮对轮缘踏面的专用机床,在生产使用过程中,液压系统的故障比较常见,而且故障多样,成因复杂,当系统发生故障在屏幕上显示报警时,也不易立即找出故障部位和根源。 一、机床液压系统及工作原理 机床的液压系统主要用于实现千斤顶升降、卡爪卡紧和放松以及与此动作相关联的自动循环,并实现机床主运动的4级机械变速。液压系统有两个油泵装置,分别置于床身左、右两端,床头端的油泵(CB—B6型齿轮油泵)用于机床主运动的变     

催化装置主风机组油泵抗晃电改造

针对催化装置主风机组油泵存在的问题,制定油泵抗晃电技术方案,改造实施后油泵抗晃电能力明显提高,运行效果良好.     

变压器风冷控制故障导致本体重瓦斯动作跳闸分析

<正>近年来,电力企业时常发生因油流涌动造成大型变压器本体重瓦斯误动而跳闸的故障,一个重要的原因是存制定防止潜油泵同时启动操作步骤时,变压器风冷控制系统故障影响潜油泵同时启动,引起油流涌动,从而发生变压器本体重瓦斯动作跳闸。风冷系统运行方式及控制原理大型强迫油循环风冷系统启动潜油泵的方式有三种:管散YF-120(200)型、片散:潜油泵启动(无论手动或自动)分两组对称启动、片散:潜油泵启动(无论手动或自动)逐台延时启动,同时停止(或逐台延时启停)。管散YF-120(200)型控制回路的工作原理:当一组冷却器投入工作     

双端面机械密封在含颗粒介质燃料油泵中的应用

某装置燃料油泵机械密封故障频繁,经常发生机械密封泄漏情况。分析燃料油泵机械密封故障原因,进行针对性的优化改进,将单端面机械密封改为双端面机械密封,冲洗方案由Plan 11改为Plan 11+53B。改造后燃料油泵机械密封运行稳定,未再发生泄漏故障。     

高温热油泵双端面机械密封泄漏故障原因分析

对高温热油泵双端面机械密封泄漏故障原因进行分析,发现主要是PLAN53B系统隔离液冷却效果不佳、循环不畅造成的。从完善冲洗方案、改善机械密封运行环境及优化操作等方面提出相应解决措施,延长高温热油泵双端面机械密封的使用寿命。     

1000 MW汽轮机EH油系统压力波动分析及处理

汽轮机EH油系统运行中出现油温上升、油泵电机电流上升、系统压力波动故障,对可能影响的因素逐一确认、排除,并采取相应处理措施。     

油水井小修作业工艺技术探讨

油井小工作是地下工作措施最基本的工作任务,通过油井的故障处理,能够保证油井状态的正常化,同时更好的符合当前油田生产企业技术需求,在加大注水将注水量的同时,从而实现最佳水驱开发效率。油井小修工作必须引人注目,研究油井小修技术措施,提高小修工程质量,促进油田开发顺利实施。     

Construct validity of some unweighted product-count diversification measures

Construct validities are assessed for three simple-to-compute, unweighted, SIC-based continuous diversification measures and a recently proposed two-dimensional, SIC-based categorical diversification measure. Two of the three continuous measures are found to correspond strongly to Rumelt's categorical measures, suggesting that these two objective and easy-to-calculate measures are better suited for large sample, strategy research than has previously been assumed. No support is found for the two-dimensional measure.     

智能用电措施的成本效益分析

智能用电措施对于提升电力系统的灵活性具有显著的作用。从时间周期以及实施主体2个角度对智能用电措施进行划分,重点分析了智能用电措施对系统经济性以及可靠性的影响,详细论证了实施智能用电措施的成本效益及其实施的主要条件,为实现高效灵活的电力系统和保障供电可靠性提供了有益的思路。     

高级管理人员激励契约研究

本文首次通过收集上市公司披露的高级管理人员激励契约，对我国现阶段高级管理人员激励契约的现状和存在的问题进行了分析和研究。研究发现：我国上市公司中高级管理人员职责不清，容易出现高级管理人员自己给自己制定报酬、考核业绩的现象；我国高级管理人员业绩评价主要依赖财务指标（净利润、利润总额、净资产收益率），非财务指标与主观评价指标在高级管理人员业绩评价中使用较少；高级管理人员的业绩标准主要是董事会制定的预算指标：高级管理人员业绩评价指标的确定比较简单，往往没有考虑高级管理人员操纵会计指标的可能性。以及不可控因素对评价指标的影响。     

Hedonic Property Valuation Models: Are Subjective Measures of Neighborhood Amenities Needed?

Common applications of hedonic residential property valuation models have relied on proxy measures of neighborhood amenities rather than directly measured subjective evaluations. While this approach simplifies data collection, there is reason to suspect that the use of proxy measures has degraded the accuracy of hedonic valuation models. The extent to which the use of proxy measures may decrease predictive accuracy, and fail to capture the effect of neighborhood amenities, has not been reported previously. The results presented here show that direct subjective measures yield only modest improvements in price prediction. Careful use of proxy measures for neighborhood amenities appears to be cost efficient for large-scale appraisal work.     

胜利油田集输系统常见腐蚀研究

分析了胜利油田集输系统常见的腐蚀类型和腐蚀机理，分别阐述了各种局部腐蚀的防护措施，并综合对比了各种防腐方法的优缺点．指出根据不同区块的实际腐蚀环境、介质及工艺条件，因地制宜、有的放矢地制定经济、合理的防腐措施是减缓和控制腐蚀的有效途径。     

Impact of Strategic Type on Success Measures for Product Development Projects*

Does the strategic type of firm affect which success measures should be used for product development (PD) projects? This paper theorizes that it should and finds that it does because the PD projects undertaken are usually an expression of the strategic type of the firm. The purpose of this research is to affirm a 1996 survey of members of the Product Development & Management Association (PDMA) that proposes that firms' PD performance measures should vary by their strategic type. Thus, for example, prospectors, the strategic type most likely to introduce new products to new markets, should place greater importance on PD success measures consistent with their characteristic strategies of changing product lines and early market entry. In contrast, defenders, the strategic type most likely to maintain stable product lines for existing markets, should place greater importance on PD success measures consistent with their characteristic strategies of stable product lines and market penetration. Analyzers, a hybrid type between prospectors and defenders, should prefer measures consistent with their characteristic strategies for improving products and being early followers in newer markets. To relate strategic types to specific success measures for PD projects, this paper proposes a model of the relationship based on the degree of project newness to the firm and then catalogs measures of PD project success and groups them according to degree of project newness. The research findings are based on survey responses from 222 individuals who are employed by financial service providers, who identified their firms by strategic type and rated the importance of PD success measures to their firms. The importance of 21 performance measures is compared by strategic type to find significant differences among prospectors, analyzers, and defenders. This research finds several significant relationships. prospectors, for example, attach greater importance to customer satisfaction, launch timeliness, and product return on investment, all of which may be characterized as relating to a higher degree of project newness to the firm. defenders and analyzers, on the other hand, attach more importance than prospectors to measures of unit volume, cost reduction, and margin goals, all of which relate to a lower degree of project newness to the firm. In short, because prospectors seek to introduce new products to new markets, they consider important those measures, which accord with greater product and market newness. The major conclusion of this paper is that strategic type affects the importance of project performance measures and that all firms should not use the same success measures. Firms should contextualize their success in PD projects based on their strategic type. This conclusion resonates with previous findings that strategy is a key determinant of PD success, though it is infrequently included in PD success studies. This paper, therefore, challenges the implicit assumption in the mainstream of PD success literature that success can be determined without regard to firm strategy.     

An Interim Report on Measuring Product Development Success and Failure

This article represents findings of a PDMA task force studying measures of product development success and failure. This investigation sought to identify all currently used measures, organize them into categories of similar measures that perform roughly the same function, and contrast the measures used by academics and companies to evaluate new product development performance. The authors compared the measures used in over seventy-five published studies of new product development to those surveyed companies say they use. The concept of product development success has many dimensions and each may be measured in a variety of ways. Firms generally use about four measures from two different categories in determining product development success. Academics and managers tend to focus on rather different sets of product development success/failure measures. Academics tend to investigate product development performance at the firm level, whereas managers currently measure, and indicate that they want to understand more completely, individual product success.     

全方位抓电费回收工作

介绍了电费欠费主要原因和应采取的措施,对内应加强基础工作,责任到位,严格考核;对外应对欠费用户建立经济制约和有力的追缴措施。     

工程质量风险管理模式的研究

分析了风险管理具体的工作内容、方法和手段，以及实行风险管理对现行建筑工程管理制度所带来的变化与优点，结合上海试点工程情况对在实际执行过程中所产生的问题进行研究，提出了改进措施。