一种新型的塑料管材成型设备--BS630扩口机的设计

BS630大口径塑料管材成型设备是人们为适应大口径塑料管材的高速发展,重点研发的大型塑料扩口成型设备,能完成对PVC塑料管材、管件的二次成型加工。介绍了其工作原理及设计要点,它采用高精度的机械元件、先进的PLC数控技术及触摸屏人机对话界面,不仅实现了全自动化无人操控,且成型管材可达到国际标准。     

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。     

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.     

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。     

小电流接地选线技术的发展应用

小电流接地选线技术是一种新型的采用多CPU分散式采集信号的接地选线技术,本文介绍了小电流接地选线的技术原理及发展情况。     

一类相同材料焊接问题的稳定性

文章讨论了相同材料带一个孔洞无限平面焊接问题的稳定性,通过引进两个全纯函数,把焊接问题转化为黎曼边值问题中的跳跃问题,从而得到应力函数的表达式,借助柯西型积分关于积分曲线和核密度的稳定性来研究其稳定性,并给出误差估计。     

Me,my family or the public good? Do inter‐role conflicts of consumer–citizens reduce their ethical consumption behaviour?

This article examines role stress, especially inter‐role conflicts (IRC), against the background of the consumer–citizen duality. It tests whether consumer–citizen conflicts impair the purchase of ethical food in terms of the ethical intention–behaviour gap. Furthermore, this study examines the potential of eustress arising from citizen–consumer conflicts to enhance actual ethical purchases. Additionally, determinants and moderating conditions of both IRC are tested. A combination of observations of actual purchase behaviour and survey data in a field setting is used to gain insights into role conflict formation and manifestation, arising from the desire to fulfil the demands of two opposing roles: consumer and citizen. The quantitative data are analysed with structural equation modelling to test the hypothesized coherencies simultaneously. Results indicate that stress arises similarly from both IRC. While a positive impact of eustress on purchase behaviour was absent, consumer–citizen role conflicts impede the actual purchase of ethical groceries. The data show that this role conflict derives, for example, from economic demands sent by the consumer role set when a person has ethical buying intentions. Additionally, the identification with the consumer role further amplifies this conflict. The data indicate that consumers instead of citizens should be empowered by marketing practitioners and policy makers, for example by reducing the perception of stress by communicating positive outcomes referring to relevant consumer role set members (e.g., added value for children from purchasing ethically) to stimulate problem–focused coping.     

European bank stress test and sovereign exposures

We use an event study methodology to revisit the bank stress test conducted by the European Banking Authority in 2011. Instead of only considering the final results disclosure, we consider six key official announcements during the stress test. Our results indicate that abnormal returns reversed over the course of the stress test and that the emerging sovereign crisis contributed to the stock market perception of bank health.     

旅游专业学生酒店实习状况对其在酒店择业意向的影响分析

采用定量研究分析了学生酒店实习工作满意度和实习工作压力情况,并验证了实习工作满意度、实习工作压力与学生在酒店业择业的意向呈显著正相关、负相关。进一步探讨了学生在酒店业择业的意向回归模型。根据模型,旅游院校和酒店企业应做好学生的教育工作,使之更加全面、深入地认识酒店业和酒店实习。同时,提高实习生工作满意度,转化实习生工作压力,将有助于提高学生在酒店业的择业意愿。     

双层金属腔体HEMP平面波孔缝耦合特性分析

高空核爆电磁脉冲（HEMP）对电子/电气设备构成严重威胁,是电磁兼容与电子/电气 设备安全领域的重要研究内容。基于时域有限差分法（FDTD）的总场-散射场体系建立仿真 空间,推导了连接边界的一维平面波引入方法,选择双层金属腔体为研究对象,仿真分析了 腔体在HEMP平面波作用下透过孔缝在各采样点的响应过程。仿真结果显示,各采样点都出现 了明显的振荡波形,其中外金属腔体孔缝中心比内金属腔体内部中心点耦合电场的峰值大; 相同面积下,正方形孔、矩形孔的耦合电场比圆孔的耦合电场小;内部腔体与外部腔体 在孔缝一侧距离的大小也会对耦合结果产生影响,间距越大,内部耦合电场的衰减越多。所 得结论 有利于指导双层金属腔体的电磁防护设计。