21世纪电池技术展望

分析了世界电池市场规模和技术现状;展望了21世纪电池技术发展趋势和前景;在比较了各类电池的优缺点和综合性能的基础上,文章指出:MH-Ni蓄电池、锂离子蓄电池、聚合物电解质燃料电池、无汞碱性锌锰电池、密封免维护阀控铅酸蓄电池以及锂锰原电池和锌空气原电池将是21世纪电池技术发展的热点。     

21世纪电池技术展望

分析了世界电池市场规模和技术现状;展望了21世纪电池技术发展趋势和前景;在比较了各类电池的优缺点和综合性能的基础上,文章指出:MHNi蓄电池、锂离子蓄电池、聚合物电解质燃料电池、无汞碱性锌锰电池、密封免维护阀控铅酸蓄电池以及锂锰原电池和锌空气原电池将是21世纪电池技术发展的热点.     

混合电动车电池的开发及展望

阐述了混合电动车(HEV)电池市场的现状和发展趋势，列出了HEV的两种设计及其对所需动力电池的技术要求；介绍了用于HEV的高功率铅酸蓄电池、高功率氢镍蓄电池和锂离子电池的技术现状、存在问题和应用前景。     

跨入 21 世纪的我国铅酸蓄电池工业

介绍了我国汽车、摩托车、通讯、电力、电动车辆、储能等部门市场现状及２１世纪前景预测，由此指出铅酸蓄电池的市场将以每年１５％～４０％的速度增长。根据目前市场及潜在市场对铅酸蓄电池技术水平的要求，总结我国目前铅酸蓄电池产品水平，指出了差距和未来发展方向。从铅酸蓄电池行业协会年报产品品种、产量、市场占有率的变化进一步分析资产结构的变化趋势，指出２１世纪我国国营企业市场的主导地位将改变，由资产重组与调整形成的少量大型企业将控制市场，主宰行业。但同时由于中国的固有特色，小企业仍有一定的发展空间。２１世纪的铅酸蓄电池行业将是一个资产结构发生了深刻变化的、发展更快的、朝气蓬勃的工业行业。     

胶体电池技术及分析

胶体电池作为铅酸蓄电池行业的新技术，在很多方面弥补了AGM电池的缺陷与不足，对于未来的铅酸蓄电池市场有着举足轻重的作用。本文将胶体电池与AGM电池进行比较论述如下：     

21世纪初期中国电力工业展望

ProspectsofChinaPowerDevelopmentinEarly21stCentury1中国电力工业的发展和电力市场的发育1．1新中国成立以来中国电力工业的发展自新中国成立以来的半个世纪中,中国政府一直把电力工业作为国民经济的先行工业,经过大规模经济建设,已形成一套比较完整并具有相当规模的电力工业体系。新中国的电力工业几乎是在旧中国空白的基础上发展起来的。1949年,全国发电装机容量只有1850MW,发电量只有43亿kw·h,位居世界第25位和对位,人均用电量只有9kw·h。经过近30a的建设,到1978年全国发电装机容量达到57120MW,发电量达到2566亿kw·h…     

21世纪高温超导电力技术

高温超导技术在电力系统的应用将带来若干直接的和间接的技术经济效益,甚至引发技术性的革命.国际超导界专家预测在5～10年内超导技术将在电力工业中获得广泛应用.可以认为,超导电力技术是21世纪具有经济战略意义的高新技术.     

Engineers in the 21st century

Most of us choose engineering as a profession because we like to solve problems and build things. I picture an engineer as a whole person, a well-rounded, well-adjusted individual who is capable of conducting business like anyone else, with the added benefit of technical skills. We are the modern-day renaissance men and women, like Edison and Da Vinci. These men could invent and create. They were artists who had a broad view of the world and saw possibilities that no one had seen before. There is no reason why we can't be like them and do even more. We understand more science and have modern tools like computers and lasers to design and build things, plus we can use information technology to gather data when we have knowledge gaps. The point is that, once we have a clear picture of who we want to be, now more than ever before, that vision is obtainable, and that vision becomes a self-fulfilling prophesy if we choose to act on it. Certainly, if we think we can't do it, we won't. I'd like to share my vision of an accomplished 21st century engineer and offer some thoughts on how to get there. I see successful engineers as people who take an early interest in science and engineering. They have alert minds and a natural curiosity for everything around them. Their drive to learn is insatiable, soaking up knowledge constantly. They do things for the love of it, not simply for monetary rewards, but for the pride and personal satisfaction that comes with doing something particularly well     

21st century warfare

This paper discusses current and emerging technologies of several types of sources and radiating systems for narrow, moderate, ultra-moderate and hyper-band (band ratio greater than a decade) high-power electromagnetic signals. On the other hand, it is a polemic advocating the view that the 21st century call for a new paradigm for weapons technology and that nonlethal weapons (NLW) are going to play an increasingly important role in combat and civil conflicts in the coming years.     

Clinical engineers in the 21st century

The primary mission of clinical engineering for the past 40 years has been in areas of medical equipment and technology management. With the turn of the century, driven by the rise of information technology in healthcare, the focus of clinical engineering is shifting towards clinical systems integration, with a concentration in patient safety. This paper presents the historical roles of clinical engineers, recent changes in clinical engineering and future advances in clinical engineering.     

Vacuum electronics for the 21st century

This article explores the history and diversity of this remarkable technology, with emphasis on advances in vacuum-electronic amplifiers, including the microwave power module (MPM), that have been enabled by the ongoing development of modeling and simulation tools. These physics-based codes, enabled by rapid advances in computational hardware, allow simulation-based design and optimization of complex vacuum-electronic circuits. The growth of satellite-based digital communications technology over the past decade has opened lucrative commercial opportunities for vacuum-electronic amplifiers. This exciting new area requires the efficient production of high-frequency power and the ability to handle spectrally efficient modulations within stringent packaging constraints at affordable cost     

The alternative strategies of the development of the nuclear power industry in the 21st century

This paper emphasizes the urgency of scientific-and-technical and sociopolitical problems of the modern nuclear power industry without solving of which the transition from local nuclear power systems now in operation to a large-scale nuclear power industry would be impossible. The existing concepts of the longterm strategy of the development of the nuclear power industry have been analyzed. On the basis of the scenarios having been developed it was shown that the most promising alternative is the orientation towards the closed nuclear fuel cycle with fast neutron reactors (hereinafter referred to as fast reactors) that would meet the requirements on the acceptable safety. It was concluded that the main provisions of “The Strategy of the Development of the Nuclear Power Industry of Russia for the First Half of the 21st Century” approved by the Government of the Russian Federation in the year 2000 remain the same at present as well, although they require to be elaborated with due regard for new realities in the market for fossil fuels, the state of both the Russian and the world economy, as well as tightening of requirements related to safe operation of nuclear power stations (NPSs) (for example, after the severe accident at the Fukushima nuclear power station, Japan) and nonproliferation of nuclear weapons.     

Technologies and health care in the 21st century

The factors shaping the nature and scope of health care in the 21st century are examined. Included are the technically driven infusion of new and innovative research and clinical tools; the diversity and capability of modern imaging methods; the predominance of diagnostic capabilities over effective therapy in clinical medicine; the focus of basic research on engineering issues such as instrumentation, biomaterials, modeling, and physiological functions; the growing use of image-based therapy; and the quest for causation in chronic conditions.     

LED——21世纪最光明的产业

1907年，HenryJosephRound第一次在碳化硅里观察到电致发光现象，从此科技工作者们便开始了崭新的探索之旅，这一旅程，从黑暗到黎明，却是整整一个世纪。 20世纪20年代晚期，BerFihardGudden和RobertWichard在德国使用从锌硫化合物与铜中提炼的黄磷产生发光，但发光太暗，无法应用。     

Heat tracing technology for the 21st century

The fundamental concepts of electric heat tracing seem quite simple on the surface. However, anyone who has been involved in an electric heat tracing "design and build" project realizes the fallacy of this notion: pipes are not always surrounded by perfect insulation envelopes; the insulation envelope can often be interrupted by pipe supports and other appendages that result in heat sink effects; pipes and vessels are not solid structures; rather, they contain or are surrounded by fluids that can be in natural motion due to density gradients resulting from heating; pipes may be constructed of nonthermally conductive materials, such as plastics, which have significantly reduced heat transfer coefficients and reduced temperature use ranges. and large diameter metallic pipes can have significant gradients around the circumference due to the lack of symmetry of the applied electric heating. This article looks at some of these not-so-straightforward aspects of electric heat tracing and demonstrate how these applications are being mastered due to advancements in engineering technology for the 21st century. In particular the article discusses the use of computational fluid dynamics (CFD) to the problems of heat tracing. CFD improves the accuracy of information supplied in applications and reduces conservative approaches fostered by the lack of definitive information     

Bioengineering: Looking into the 21st century

Considers the subjects and areas that will be the concern of bioengineering in the coming century. Topics mentioned include: mechanisms of learning and memory fixation; genes and cardiovascular diseases; molecular and cellular biology; tissue grafts; organ transplants; biomechanics; noninvasive techniques to avoid pain