High-speed DRAM architecture development

This paper is an overview of the high-speed DRAM architecture developments. We discuss developments on density growth, interface technology, memory-core architecture, and DRAM+ASIC technology. We can find the developments of density as 2× growth instead of 4× by each generation. Interface technologies will have a tendency to use the terminated bus structure for higher data rate. Memory-core architecture developments are the trials for actual bandwidth improvements. DRAM+ASIC technologies seem to require universal interface solutions. We tried to show that no single solution is able to cover the wide diversity of future system requirements     

碳纳米管及其制备技术

介绍了碳纳米管及其制备技术的国内外最新研究进展,分析了碳纳米管材料的研究现状,并对碳纳米管材料未来的发展方向进行展望。     

Crystal growth — not even the sky is the limit

Crystal growth is the foundation of the semiconductor industry for without the breakthrough in crystal purification back in the 1950s we would likely still be relying on vacuum tube electronics rather than transistors and ICs. The latest developments include developments seeking to improve the starting materials for GaN and efforts to exploit the final frontier, space.     

Atomic frequency standards: A survey

The last comprehensive survey on atomic frequency standards was done by McCoubrey [1]. This survey reviews the more recent historical background of atomic frequency standards leading to the present developments. A discussion of the underlying physical and engineering principles is given. Modern atomic frequency standards, including their performance, are compared quantitatively, and projections are attempted at likely future developments and performance characteristics. As in 1966, the standards principally used in technical and scientific applications are rubidium gas cell devices, cesium beam tubes, and hydrogen maser oscillators. However, substantial advances in physical and performance characteristics can be reported. New developments include passive hydrogen devices, saturated absorption stabilized lasers, ion storage devices, and atomic beams in the far infrared and infrared region, as well as new techniques to evaluate frequency biases such as those encountered in cesium and hydrogen standards. The survey includes a discussion of the effects of past and current developments in atomic frequency standards on the technical and scientific user community.     

Electro-acoustic Technology’s Latest Development in Patent Documents 郝庭基

专利文献中记载着大量最新的技术研究成果并且能够预测未来的技术走向.对海量专利文献进行分析时分类体系是很重要的手段,CPC作为最新的、最精细、最准确并且全球基本通用的分类体系能够有效用于专利分析.本文借助CPC分类体系对扬声器领域的专利文献进行分析,以期获得该领域技术的最新发展.     

笼形团簇材料

近年来,在原子、分子和凝聚态两层次之间出现了原子团簇这一重要的学科领域。本文介绍了笼形团簇材料的国内外最新研究进展,分析了笼形团簇材料的研究现状,并对其未来的发展方向进行了展望。     

Szenarien zur Entwicklung der Stromversorgungsnetze

Globalization and deregulation have a strong impact on developments in the electrical industry. In emerging countries, energy demand is increasing rapidly. In the industrialized countries, the increase in demand is low, however based on a high existing level. This situation has a strong influence on developments in power systems. The most important characteristics in power system development is discussed for industrialized countries. Electrical manufacturers develop and deliver equipment and systems which can solve system problems in an economic manner.     

Applications of CCD and switched capacitor filter technology

Since the earliest developments of charge transfer devices for signal processing functions, there has been a rapid evolution of the technology towards the capability of implementing complex signal processing functions on a single silicon substrate. Recently, switched capacitor filter technology has proven to be a complementary monolithic filter technology which is compatible with CCD's in fabrication. We review the operating principles of both filter technologies and present some recent developments in a number of signal process applications.     

量子线红外光子探测器的研究进展

基于半导体量子线子能带间跃迁的量子线红外光子探测器（QRIP）由于其独特的电子性质,具有工作温度较高、信噪比较高、暗电流较低、光谱范围较宽以及垂直入射光响应等特点．对于新型红外探测器的研发而言,QRIP是颇具潜力的候选者之一．通过对近年来部分相关文献的分析介绍,总结和评述了QRIP制备工艺、物理性质、仿真方法等方面的研究进展．     

微带天线理论和技术的进展

本文综述了迅速发展中的微带天线理论和技术的新进展。侧重评述了基本理论和圆极化、宽频带、多频段及馈电等技术的进展,并介绍了毫米波微带天线阵和有源固态相控阵等新型微带阵列。最后展望了发展方向。     

Least-squares estimation: from Gauss to Kalman

This discussion is directed to least-squares estimation theory, from its inception by Gauss1 to its modern form, as developed by Kalman.2 To aid in furnishing the desired perspective, the contributions and insights provided by Gauss are described and related to developments that have appeared more recently (that is, in the 20th century). In the author's opinion, it is enlightening to consider just how far (or how little) we have advanced since the initial developments and to recognize the truth in the saying that we ``stand on the shoulders of giants.'     

MEM's the word for optical beam manipulation

The best way to switch the direction of an optical beam is simply to rotate a mirror, focus an optical beam by mechanically translating a lens, or extinguish an unwanted optical beam by physically blocking its path. Recent, independent developments in microelectromechanical (MEM) devices promise to remedy the issue of high cost and unreliability associated with the “moving parts” needed for these optical functions. This article describes some aspects of these recent developments undertaken in the “microphotonics” group at U.C. Berkeley on building MEM-based optical systems on a silicon chip     

射频识别领域标准化发展动态

阐述了射频识别领域的业务范围,介绍了射频识别领域国际标准的最新进展.以我国射频识别标准体系框架为基础,从射频识别领域国家标准的最新进展及其测试服务两个方面阐述了我国射频识别领域标准化的发展动态.     

Current developments in Loran-C

A survey is provided of the many new developments in the Loran-C radio navigation system in recent years; in system coverage, capabilities, and applications. These have come about as a result of new station installations and modern electronics. System techniques are reviewed and uqpdated, information on radio propagation is summarized, and micropcocessor-based receiver developments and solid-state ground transmitters are described. This has resulted in new applications of Loran-C to harbor navigation, civil aviation, and terrestrial uses, as well as extension of long-range capabilities, Extensive references are provided.     

UNICORE 6 — Recent and Future Advancements

UNICORE is a European Grid Technology with more than 10 years of history. Originating from the Supercomputing domain, the latest version UNICORE 6 has turned into a general-purpose Grid technology that follows established standards and offers a rich set of features to its users. The paper starts with an architectural insight into UNICORE 6, highlighting the workflow features, standards and the different clients. Next, the current state of advancement is presented by describing recent developments. The paper closes with an outlook on future planned developments.     

激光晶体材料的发展和思考

在分析激光晶体研究现状的基础上，指出其未来应用及主要发展趋势：高功率、大能量激光晶体；中红外激光晶体；蓝绿紫和可见光激光晶体；LD抽运超快激光增益和放大介质晶体。以上四个方向中，高功率、大能量全固态激光晶体材料和LD抽运超快激光晶体材料又是覆盖其他方向、带有共性基础科学问题的关键方向。着重报道了LD抽运超快激光晶体材料的最新研究进展。     

Tokamak reactor studies

This paper presents an overview of tokamak reactor studies with particular attention to commercial reactor concepts developed within the last three years. Emphasis is placed on DT fueled reactors for electricity production. A brief history of tokamak reactor studies is presented. The STARFIRE, NUWMAK, and HFCTR studies are highlighted. Recent developments that have increased the commercial attractiveness of tokamak reactor designs are discussed. These developments include smaller plant sizes, higher first wall loadings, improved maintenance concepts, steady-state operation, nondivertor particle control, and improved reactor safety features.     

Technology '88: solid state

Significant developments of 1987 are reviewed, namely, a truce in the chip war between the US and Japan; the arrival of 4 Mb chips, with the 16 Mb chips on the horizon; the growing market for application-specific ICs; refinements in floating-point digital signal processors; GaAs-on-silicon wafer; and high-density packaging for chips. An expert opinion is offered by W. David Price, a senior member of the technical staff of IBM's semiconductor facility in Essex Junction, Vermont, who comments on a number of developments     

Ruthless reductionism in recent neuroscience

Cognitive informatics has a stated interest in keeping track of developments within the neurosciences, especially concerning cognitive phenomena (like learning, memory, perception, complex motor execution, and even consciousness). Until now, cognitive informaticists have only attended to developments in cognitive neuroscience and neuropsychology. In this paper, I urge that cognitive informaticists begin attending to molecular and cellular cognition. This exciting new field employs a "ruthlessly reductive" methodology that continues to elucidate the mechanisms of cognition and consciousness. My argument is empirical: I survey some recent developments from this field for phenomena that cognitive informaticists have cited as relevant to their concerns. By attending to such developments, cognitive informaticists will also insert their discipline into the applications of information-theoretic resources to the search for cellular and molecular processes generating cognition and consciousness.     

Topologies and design considerations for distributed power systemapplications

This paper describes developments in the technology of converters primarily intended for server-type distributed power system (DPS) applications. The paper first addresses the single-phase two-stage DPS, discussing the available options for simple power factor correction and high-performance DC-DC converters. Next, the concept is extended to three-phase high-power front-end converters, which also use a two-stage approach. Finally the paper presents the developments in load converters, with emphasis on low-, medium-, and high-voltage regulator modules used to supply high-performance microprocessors. The discussion throughout the paper is supported by an extensive list of references and experimental results