对于火力发电厂燃料系统安全运行的探究分析

输煤系统是火力发电厂里重要的标志性组成部分,而输煤皮带的安全运行最为直接的影响了电厂的安全指标和经济效益。本文从火力发电厂燃料运行系统安全运行方面,对其影响因素进行分析探究,并提出防范对策,让今后在有效维护和保证系统安全运行时有所参考。     

Development of the ‘Travelcard’ Concept in Urban Public Transport

Traditionally, urban bus operators have collected fares in cash for each trip. Some limited mechanisation has occurred in ticket issue at stations. Partly for reasons of operating convenience, there has recently been a shift to simpler fares and prepayment, notably through the introduction of ‘Travelcards', that is, tickets or passes permitting unlimited use of the network (or zones thereof) for a defined period. These cover both all-bus systems, and bus/rail networks (such as the West Midlands PTE system). They are now used in all main British conurbations, following introduction of the London Transport bus/rail Travelcard in May 1983. The Travelcard in effect redefines the ‘product’ being sold. Instead of the public transport service being perceived as a series of separate journeys, payment is made periodically for use of the network as a whole. Cost perception is thus put on a similar basis to that for the private car. The marginal money cost for each trip becomes zero. Interchange penalties associated with re-booking are eliminated. Payment may be made by cheque or credit card, rather than cash, further changing the perception of costs. Product quality is also enhanced through speeding up of services (one-person- operated buses), and enabling the user to select the quickest and/or most convenient route in a network by removing the interchange penalty.     

The relationships between stress,health, and physically active leisure as a function of life‐cycle

This article examines relationships between stress, health, and participation in physically active leisure using data collected as part of the 1985 and 1990 U.S. National Health Interview Surveys (NHIS). In particular, the article analyzes: (a) the effects of life‐cycle progression (controlled for gender) on subjectively perceived stress and self‐reported health; (b) the role of physically active leisure in enhancing health or buffering adverse health outcomes of stress; and (c) the effects of selected social‐economic factors, such as education and income, on the relationships between life‐cycle, stress, health, and physically active leisure. According to our analyses: (1) stress is unevenly distributed across the life span; (2) stress‐reducing effects of physically active leisure are present among retired older people more so than in the middle‐aged life‐cycle groups; and (3) direct health‐enhancing effects of participation in physically active leisure are more evident than the buffering effects of leisure on stress‐health relationships. A critical discussion of methodological and substantive issues facing researchers interested in the relationships between leisure, stress, and health is provided.     

某校行政办公楼预应力砼梁施工方案

在进行预应力砼梁施工时,施工用材要符合设计要求,设备满足施工要求。文章从设备、配件的安装检查,预应力钢绞线的安装、锚固、张拉应力的控制及施工技术要点,砼梁的浇筑及灌浆养护,安全文明施工、环境要求及工程资料的整理等方面对预应力砼梁施工进行了探讨。     

Challenging The Spirit Level: Is There Really a Relationship between Inequality and Obesity?

This paper examines the proposition, set out in The Spirit Level, that inequality is associated with high levels of obesity. It reviews existing literature and uses British Household Panel Survey data to study how district‐level and regional‐level income inequality is related to obesity in the UK. This is likely to be the first study of its type that uses individual‐level data that is representative of the UK population. We find little evidence to support policies that reduce income inequality with the aim of reducing obesity levels in the UK.     

开敞式泄水闸稳定应力计算

对某开敞式泄水闸进行了整体抗滑稳定和基底应力计算,计算结果表明泄水闸的结构布置是合理的。     

对火电企业燃煤管理中的问题探讨

燃煤管理是火电企业生产经营中的一项重要工作。应客观认识燃煤管理中出现的问题，了解管理的薄弱环节。根据现阶段火电企业生产经营面临的困难和问题，采取有效措施避免燃煤管理不规范可能发生的问题，有利于火电企业的健康发展。     

预制桩填土复合地基的设计与施工

论述了小预制方桩与压实填土复合地基在大型污水处理池中的设计与施工应用情况，提出了粘性填土分层压实、具有不小于80kPa承载能力的观点，如桩端土层良好，则可大幅度提高复合地基的强度。     

考虑应力作用影响的黄泛区粉土土水特征曲线分析与预测

为了研究应力作用对土水特征曲线的影响，采用应力关联土水特征仪测定不同应力下粉土的脱湿-吸湿曲线，讨论应力变化对粉土土水特征的影响规律，并利用应力与孔隙比的关系提出考虑应力作用的粉土土水特征曲线预测方法。研究发现：试样在应力逐渐增加时不易脱水，但更易吸水，非饱和粉土的持水能力随着正应力的增大而增强；脱湿曲线与吸湿曲线并不重合，有明显的回滞现象，并且吸湿曲线饱和度的变化比脱湿曲线更加剧烈；随着正应力的增大，滞回圈面积减小，滞回特性减弱。此外，将预测曲线与测得的试验曲线对比, 可知提出的考虑应力的土水特征曲线预测方法具有较好的预测精度。     

国有资源开发型企业员工压力状况研究——以中国石油长庆油田公司为例

文章以中国石油长庆油田公司为例，对大型资源开发企业员工压力状况和压力源进行实证分析，研究发现影响员工满意度的压力源是“环境条件与员工预期”“家庭关系”和“工作支持与工作决策参与度”三个因素，并对形成这一压力的原因进行了讨论，提出了缓解压力的对策建议。