高效液相色谱柱的管理   总被引：3，自引：0，他引：3  

谢虹  刘秋朝  梁建生  高红明 《实验室研究与探索》2003,22(3):117-118,125

介绍了影响色谱柱使用寿命的几个因素，探讨了色谱柱规范化管理和保养的经验。  相似文献   

40t燃油铝混合炉门升降机构的改造     

崔文平  侯纯军 《焦作大学学报》2005,19(2):63-64

介绍了40t燃油铝混合炉炉门提升机构改造前存在的问题及改造过程。并对炉门提升机构液压控制原理、液压站布置、液压缸的改造方法进行了详细说明。  相似文献   

17－18世纪世界整体发展中的俄国：压力与对策     

赵士国  刘自强 《湖南师范大学社会科学学报》2001,30(5):116-121

17－18世纪世界整体发展给俄国带来了多方面的压力,近代俄国政府始终坚持“欧化”改革,积极参与国际竞争,到18世纪末,终于跻身世界强国之列,俄国的经验为今天的发展中国家参与全球化竞争提供了有益的启示。  相似文献   

离心机平衡气缓冲气差压的建立     

言钧 《兰州石化职业技术学院学报》2004,4(1):4-6

重整循环氢压缩机封油系统平衡气缓冲气的差压建立自开工以来就存在着一系列的问题，通过对压缩机封油系统的流程改造，解决了差压无法建立、润滑油泄漏等问题。  相似文献   

需要层次理论与农村职校教师压力缓解     

袁双龙  屈正良  袁带秀 《职业技术教育》2006,27(1):61-63

问卷调查和访谈结果显示,农村职业学校教师在经济状况、社会地位、工作任务和人际交往等方面存在压力。以马斯洛需要层次理论为依据,提出缓解农村职业学校教师压力的思路和策略,如提高工资、待遇与福利,改善教学设施;改革管理模式与教学模式,强化教师的归属感;提高社会公众对农职教、农职教师的关注度;指导、激励教师进行生涯规划,达到自我实现的目的。  相似文献   

高校辅导员的压力管理——专职辅导员基本状况调查的结果分析   总被引：2，自引：0，他引：2  

黄文浩 《广东技术师范学院学报》2007,(6):74-78

文章以本校专职辅导员基本状况调查结果为基础,从管理学、心理学的视角,从组织因素、环境因素、个人因素三方面分析辅导员工作压力产生的原因,并相对应地提出辅导员压力管理的具体措施.  相似文献   

Orienting Schools Toward Equity: Subgroup Accountability Pressure and School-Level Responses     

Rachel Garver 《The Educational forum》2017,81(2):160-174

Abstract

This article examines school-level responses to subgroup accountability pressure through an ethnographic case study of a school cited for failing to make adequate yearly progress for student subgroups. Concerns about the calculations and measures used to derive the citation and reservations about acting on accountability data delegitimized the citation and rendered the identified subgroups irrelevant to daily practice. Under district guidance, compliance with subgroup accountability was independent of the school's internal efforts to promote equity.  相似文献   

新型高效高频高压直流电源制作     

徐健  徐琼燕 《九江职业技术学院学报》2005,(4):9-11

本文介绍了一种采用新技术制作的新型高效高频高压直流电源。该电源工作频率高达150KHZ，电路同时采用了恒压斩波、恒流斩波和桥式斩波三级电路。高压电源的主变压器骨架，采用绝缘性极好的聚四氟乙稀材料，因而使该电源的效率、可靠性及安全性大大提高。  相似文献   

用有限元法合理设计压力容器凸形封头     

詹世平 《大连大学学报》1996,(2)

运用有限元法,考虑封头的结构、封头与简体的连接形式、开孔位置、接管与封头的连接结构等因素,对受内压的凸形封头(球形封头、椭圆形封头、碟形封头及锥形封头)进行了应力分析计算。  相似文献   

Dynamic Wave Pressures on Deeply Embedded Large Cylindrical Structures due to Random Waves     

刘海笑  唐云  周锡礽 《天津大学学报(英文版)》2003,9(1):21-28

The response of dynamic wave pressures on structures would be more complicated and bring about new phenomena under the dynamic interaction between soil asnd structure.In order to better understand the response characteristics on deeply embedded large cylindrical structures under random waves,and accordingly to offer valuable findings for engineering ,the authors designed wave flume experiments to investigate comparatively dynamic wave pressures on a single and on continuous cylinders with two different cembedment depths in response to two wave spectra ,The time histories of the water surface elevation and the corresponding dynamic wave pressures exerted on the cylinder were analyzed in the frequency domain,By calculating the transfer function and spectral density for dynamic wave pressures along the height and around the circumference of the cylinder,experimental results of the single cylinder were compared with the theoretical results based on the linear diffraction theory ,and detailed comparisons were also carried out between the single and continuous cylinders ,Some new findings and the corresponding analysis are reported in present paoer,The investigation on continuous cylinders will be used in particular for reference in engineering applications becaus information is scarce on studying such kind of problem both analytically and experimentally.  相似文献