紧固件国家标准的变化对企业的影响

综合论述了紧固件国家标准在机械性能等级、适用范围、验收检查标准、产品重量、表面粗糙度、尺寸公差表示法、产品品种和等级、螺纹组合件、尺寸和规格、术语等方面对企业的影响。本企业尤其要注意国家标准不适合于高温范围、可焊接和耐腐蚀性的紧固件。     

HG20592～20635-97《钢制管法兰、垫片、紧固件》标准介绍

介绍HG20592～20614-97（欧洲体系）和HG20615～20635-97（美洲体系）标准管法兰的主要内容,并提出了使用该系列标准应注意的一些问题。     

谈紧固件的性能等级标志

阐述了我国最新国家标准规定的螺栓、螺钉和螺柱等紧固体所用的性能等级标志代号及其含义,强调了了解性能等级标志代号在工作中的重要作用.     

谈紧固件的性能等级标志

阐述了我国最新国家标准规定的螺栓、螺钉和螺柱等紧固体所用的性能等级标志代号及其含义，强调了了解性能等能标志代号在工作中的重要作用。     

建立和完善企业标准体系

介绍企业如何建立"企业标准体系",以及在市场经济条件下,企业如何进一步调整和完善"企业标准体系"以适应市场竞争的需要,不断满足顾客对产品的要求和期望,推动企业的发展。     

GT13D3燃气轮机高温紧固件的国产化

在大修中常发现GT13D3燃气轮机的许多高温紧固件已经损坏,通过对进口高温紧固件的分析和研究,进行了国产化的替代试验,最终取得了成功。同时电厂也取得了显著的经济效益。     

热处理工艺对20Cr1 Mo1 V1紧固件性能的影响

对紧固件用钢20Cr1Mo1V1进行了一系列热处理试验,并用扫描电镜和透射电镜对其断口及组织进行了观察,采用电解萃取的方法用X光衍射仪对碳化物进行了确定,从而找出了最佳热处理工艺。     

供电企业管理模式的研究

根据我国供电企业的特点 ,讨论了为供电企业增效的几种管理模式。这些模式与其他企业的管理模式有相同之处 ,也有不相同之处。在电力企业中 ,做为国有、具有垄断性的企业 ,有必要更新观念、适应用户需求 ,重视对管理模式的研究 ,进一步从管理上提高企业效益。     

工业企业能源管理信息系统研究

针对工业企业能源管理信息系统(EEMIS)建设过程中缺乏能效诊断技术的问题,在传统信息系统和自动化系统的基础上,通过机理建模和机器学习相结合的方法,研究了重点用能设备、耗能工序和能量系统的能效分析模型,提出了一种新型的EEMIS的结构和功能,并开发了软件,弥补了EEMIS在能效分析诊断方面的不足,增强了系统的实用性。     

浅论汽车零部件企业的安全管理

前言 汽车工业是国民经济重要的支柱产业.进入21世纪以来,我国汽车产业高速发展,形成了多品种、全系列的各类整车和零部件生产及配套体系.汽车工业产业链长、关联度高,一旦某个零部件企业发生事故,导致停产断供,将会直接影响整车厂的生产,整车工厂的停产又将影响整个产业链的生产.     

Overview of the DOE hydrogen safety,codes and standards program,part 3: Advances in research and development to enhance the scientific basis for hydrogen regulations,codes and standards

Hydrogen fuels are being deployed around the world as an alternative to traditional petrol and battery technologies. As with all fuels, regulations, codes and standards are a necessary component of the safe deployment of hydrogen technologies. There has been a focused effort in the international hydrogen community to develop codes and standards based on strong scientific principles to accommodate the relatively rapid deployment of hydrogen-energy systems. The need for science-based codes and standards has revealed the need to advance our scientific understanding of hydrogen in engineering environments. This brief review describes research and development activities with emphasis on scientific advances that have aided the advancement of hydrogen regulations, codes and standards for hydrogen technologies in four key areas: (1) the physics of high-pressure hydrogen releases (called hydrogen behavior); (2) quantitative risk assessment; (3) hydrogen compatibility of materials; and (4) hydrogen fuel quality.     

提高太阳热水器得热量的方法

热水器得热量及热损系数是衡量太阳热水器优劣的主要技术指标。在目前的技术水平下,热损系数已经相当小,因此,提高单位面积有效得热量就成为进一步改善太阳热水器性能的一个主要途径。笔者在查阅部分文献后,主要从选择性吸收涂层、反射板、玻璃及热水器结构等方面着手,归纳了几种能有效提高太阳热水器单位面积有效得热量切实可行的方法。     

Solution to enhance the acceptability of solar-powered LED lighting technology

Unavailability of grid based electricity is a major challenge facing a majority of developing countries, particularly the population in rural areas. Consequently, people are forced to use the kerosene lantern in much of the world for lighting. However, fuel-based lighting is contributing to global warming and causing serious health related problems. To address these issues, several developing countries are now encouraging the use of sustainable clean lighting systems – solar-powered light emitting diode system. In the present paper, barriers and mechanisms to boost the use of solar-powered lighting are discussed.     

机械制造企业资源计划管理信息系统的建设和实施

从企业资源计划管理（ERP）系统的建设和实施方面,介绍了大同电力机车有限责任公司信息化建设的成功经验、成果以及企业进行信息化建设的重要性和必要性。     

A re-look at the biochemical strategies to enhance butanol production

Butanol produced from renewable feedstock is defined as an emerging biofuel and biochemical. Research efforts made during the last three decades on biochemical production of butanol via conventional ABE (acetone-ethanol-butanol) fermentation has tried to bring biobutanol close to competition with petrobutanol. However, each new effort of development has been often countered by new challenges, confining biobutanol production mostly to the laboratory scale. This review provides a systematic, comparative analysis of different steps in biochemical production of butanol and identifies the counteractive aspects and challenges to overcome. A special emphasis is given on process inhibitors, applied detoxification techniques, chemical supplements and research & development in industry in order to enhance and update ABE fermentation and make it cost effective. Biobutanol future lies in utilization of inexpensive cellulose enriched lignocellulosic hydrolysates and hyper-butanol producing bacteria, combined with specific detoxification techniques and followed by efficient continuous fermentation technologies together with in situ product recovery.     

强化车轮踏面提高踏面剥离抗力

概述了形成机车车轮踏面剥离的主要原因,介绍了喷丸强化技术和滚压强化技术的应用实例及其对提高机器零件疲劳强度的显著作用.结合工厂实际情况,提出了强化车轮踏面,抵抗疲劳破坏能力的具体措施.