20Kt/a煅烧焦回转窑耐高温下料溜管技术改造的研究

介绍在大港油田20Kt/a煅烧焦厂煅烧回转窑高温下料溜管的投产使用中,针对出现的焊口开裂、高温下管体变形等一系列问题,通过焊接应力分析、高温温差应力、溜管整体结构受力分析等方法和原理,从整体结构和焊接方法两方面进行技术改造,探讨出符合大港油田20Kt/a煅烧焦60米回转窑使用要求的耐高温下料溜管制作安装方法。     

湖南工业化进程的生态环境压力趋势分析

随着人类经济活动，尤其是工业的加速发展，资源能源的利用和环境污染对生态环境这一人类赖以生存和发展的基础产生了越来越大的压力。基于湖南经济发展中工业化进程的加快对生态环境的压力加大这一状况，现利用生态环境压力指数法（ESl）对生态环境所造成的压力作趋势分析。结果表明，湖南自1999年至今，随着大力推进工业化进程，资源能源压力及环境污染压力均明显加大。故走生态工业化道路、建设节约型社会是唯一出路。     

Revisiting the matching function

There is strong empirical evidence for Cobb–Douglas matching functions. We show in this paper that this widely found relation between matches on the one hand and unemployment and vacancies on the other hand can be the result of different underlying mechanisms. Obviously, it can be generated by assuming a Cobb–Douglas matching function. Less obvious, the same relationship results from a vacancy free-entry condition and idiosyncratic productivity shocks. A positive aggregate productivity shock leads to more vacancy posting, a shift of the idiosyncratic selection cutoff and thereby more hiring. We calibrate a model with both mechanisms to administrative German labor market data and show that idiosyncratic productivity for new contacts is an important driver of the elasticity of the job-finding rate with respect to the market tightness. Accounting for idiosyncratic productivity can explain the observed negative time trend in estimated matching efficiency and asymmetric business cycle responses to large aggregate shocks.     

High-Performance HR Practices,Work Stress and Quit Intentions in the Public Health Sector: Does person–organization fit matter?

Drawing on the attraction–selection–attrition (ASA) framework, this paper examines a mechanism, namely person–organization (P–O) fit, through which high-performance HR practices (HPHRPs) affect two negative employee outcomes: work-related stress and quit intentions. Using a sample of Egyptian public health sector workers, a mediation model is tested empirically using structural equation modelling. The study results show that HPHRPs positively affected P–O fit, which in turn had significant negative associations with work stress and quit intentions. P–O fit also explained a high proportion of mediation in the relationship between HPHRP and both outcomes.     

Effects of job stress on self-esteem,job satisfaction,and turnover intention

ABSTRACT

This study is focused on female inbound call center counselors who are easily exposed to emotional labor when customers express anger and hostility and use swear words toward invisible targets on the phone. Our study is based on 244 responses from female inbound call center counselors. Job stress has a significantly negative effect on job satisfaction and self-esteem. It was shown that self-esteem has a partially mediating effect, and turnover experience had a moderating effect. It is important to shed new light on the roles of self-esteem among determinants of job satisfaction.     

浅议提高学生英语阅读情趣

当今世界第一位的挑战 ,是人才素质的竞争 ,而英语素养的高低是人才素质的重要方面。凡是较成功的英语学习者几乎都得益于英语阅读。如何提高学生英语阅读的情趣和品位 ,已成为很多教师普遍关注的问题     

球罐焊接后热处理对残余应力的影响

球罐容积大、壳体壁厚、球壳板刚度较大,在组装过程中不可避免地产生较大的组装与焊接残余应力和变形,因而球罐焊后整体热处理对其安全使用尤为重要。本文采用SYSWELD工程有限元分析软件中的热处理工具,结合实际的热处理规范要求,加载焊接后模型的温度场和残余应力场状态,以达到对焊后热处理的真实模拟。为研究焊后热处理工艺对减小焊接残余应力的意义提供理论指导。     

论述壁面剪应力在提高固井水泥浆顶替效率的研究

固井工程是一项应用工程,是建井过程中的重要环节,它直接影响钻井周期和建井成本,以及油田开发方案的实施。深井、超深井的井下地质条件非常复杂,对固井质量有许多不利的因素,在井下条件确定的情况下,决定性的因素是环空流动的壁面剪应力,它是影响顶替效率的主要因素。     

港口起重机械金属结构寿命评估

起重机金属结构的寿命评估对于港口起重机管理工作具有重要意义,通过现场应力测试采集得到的数据导入自主研发的《起重机金属结构寿命评估系统》,利用Miner线性累积损伤理论可对起重机构件的疲劳裂纹萌生寿命进行评估计算,运用断裂力学和损伤容限设计理论则可得到裂纹的扩展寿命,并以此为根据制定出裂纹巡检方案。     

工作压力、学习负担对注册会计师\n职业倦怠影响的实证研究

注册会计师职业倦怠是审计研究的一个新领域.我国审计学术界至今尚没有开展对注册会计师职业倦怠的系统研究.在借鉴国外研究文献的基础上,探讨我国注册会计师职业倦怠的诱因后发现,工作家庭冲突、角色冲突和学习负担对注册会计师职业倦怠有显著影响,但工作过载对注册会计师职业倦怠的影响则不显著.另外,注册会计师年龄与会计师事务所规模对弱化注册会计师职业倦怠有较强的积极效果.