超纯氨(99.99999%)净化技术的最新研究进展

随着LED的飞速发展,作为重要原材料的高纯氨的纯度已达到7 N(99.99999%),传统的净化方法已成为初级预处理手段。介绍了当今世界最先进的氨净化方法,旨在提高我国超纯氨国产化水平,以满足中国LED生产的需要。     

国家"863"计划推进高技术成果产业化的举措

1月26日国家“863”计划工作会议在京召开,会议提出了《关于加强“863”计划成果产业化工作的若干意见》并部署了有关具体措施。为推动高技术成果产业化,科技部正式确认首批16个国家“863”计划成果产业化基地,它们是:1深圳科兴生物制品有限公司;2北京中自汉王科技公司;3...     

Toward a Strategy for Teaching Engineering Design

Design is behavior. Therefore, it can best be understood by means of behavioral theory and must be taught in a way consistent with the theory of behavior modification. This simple fact appears to have been overlooked by most, if not all, engineering educators who teach design courses or write textbooks on engineering design. This article examines this thesis and its relationship to engineering heuristics by considering specific examples taken from current practice in engineering design education.     

微波高温加热技术进展

微波高温加热技术被认为是本世纪最有可能取代传统外部加热技术而应用于材料制备的先进技术之一.总结了近年来微波高温加热技术在理论与模拟、结构材料和功能材料方面的研究进展,并对微波高温技术在产业化方面的应用现状和发展前景进行了论述.     

超细粒子复合技术进展

较全面、系统地综述了有关超细粒子（微米、纳米级）的复合技术,并按复合反应形式不同将其分类为物理复合法及化学复合法。同时对国内外近年来较新的复合技术（及设备）进行了介绍和说明,并对复合过程中一些需要注意的基本问题也作了简单的综述。另外,还阐述了粉末复合技术的发展方向。     

低温工程技术综述

ＣＥＣ／ＩＣＭ’９９和ＳＣＷ’９９两个会议确定的会议主题分别为进入下世纪的低温工程和在下世纪空间探索中的低温工程。本文分节综合分析低温工程及技术的现状,主要包括：最新研究概况,扼要述及能源,航天,科研,工业及生物等的低温技术进展。     

Toward Robust Macroscale Superlubricity on Engineering Steel Substrate

“Structural superlubricity” is an important fundamental phenomenon in modern tribology that is expected to greatly diminish friction in mechanical engineering, but now is limited to achieve only at nanoscale and microscale in experiment. A novel principle for broadening the structural superlubricating state based on numberless micro-contact into macroscale superlubricity is demonstrated. The topography of micro-asperities on engineering steel substrates is elaborately constructed to divide the macroscale surface contact into microscale point contacts. Then at each contact point, special measures such as pre-running-in period and coating heterogeneous covalent/ionic or ionic/ionic nanocomposite of 2D materials are devised to manipulate the interfacial ordered layer-by-layer state, weak chemical interaction, and incommensurate configuration, thereby satisfying the prerequisites responsible for structural superlubricity. Finally, the robust superlubricating states on engineering steel–steel macroscale contact pairs are achieved with significantly reduced friction coefficient in 10⁻³ magnitude, extra-long antiwear life (more than 1.0 × 10⁶ laps), and good universality to wide range of materials and loads, which can be of significance for the industrialization of “structural superlubricity.”     

工业工程中的成本技术

本文揭示了工业成本的经济内涵和技术内涵，指出工业工程的本身，就是致力于提高经济效益最直接、最有效的成本技术，并强调进行工业成本的设计，设立成本工程师职位，确定成本标准，是降低工业成本的最根本的途径之一。     

分子标记技术的进展及其应用

综述了分子标记产生与发展的过程,综合比较,分析了目前常用的RAPD、DAF、SSCP、AFLP、VNTR、RFLP、同工酶等分子标记技术的原理、特点和适用范围,简要介绍了分子标记技术的研究与开发现状以及未来的发展趋势。     

计算机辅助设计和制造中的先进技术

本文简要介绍了在计算机辅助设计和制造中出现的一些先进的技术，包括快速原型ＲＰ和快速工具制造ＲＴＭ；计算流体动力学ＣＦＤ；以及工程应用中的虚拟现实ＶＲ。这些先进技术为开发新产品提供了方便，并得到越来越多的应用。     

现代涂布工艺研究进展

本文对坡流挤压涂布工艺中几个普遍问题如多层挤压涂布所必须的条件，挤压涂布最高车速可有多高？最薄可涂多薄？最厚可涂多厚？挤压涂布中常见弊病等普遍关注的问题方面进行的研究进展作简要的介绍。     

Toward a Platinum Society:Challenges for Engineering Science

<正>The 21st century will be a turning point in the history of humankind.Accordingly,it is my strong belief that engineering science will also be compelled to undergo a major historical transformation.Today,humankind is at a pivotal period of historic importance,similar to the time of the Industrial Revolution.This is especially true for people living in developed countries who enjoy quantitative     

制冷空调行业的科技进步与体制创新

改革开放20多年，由于实施科技进步与体制创新的策略，促进了生产力飞跃发展，使中国制冷空调行业的工业总产值翻了六倍，成为仅次于美、日两国的世界第三冷冻空调设备生产国。     

Technology Engineering: The Concurrent Development of Space Transportation Systems and Technology

Abstract:

This article develops and presents a technology engineering framework for the selection, development, and insertion of space transportation technologies concurrent with the systems engineering of the space transportation system(s) in which the technology will eventually be employed. The technology engineering framework developed and presented in this article draws on existing systems engineering processes, tools, and methods; takes into account the differences between systems engineering and technology engineering; and accounts for the high degree of interaction required between the concurrent technology and system development programs. The components of this technology engineering framework are discussed, and the major steps in the technology engineering process are outlined. An investigation is also conducted into facilitating the implementation of key portions of the framework using a state-of-the-art relational computer database referred to as the Reusable Launch Vehicle (RLV) Technology Database (RTDB). This database is demonstrated to provide an invaluable tool to collect, manipulate, analyze, document, and disseminate technology-related information, including previous research results, key technical parameters and characteristics, technology readiness levels, relationships to other technologies, costs, and potential barriers and risks.     

等重下料技术及其工程化应用

简要介绍了应用于大直径棒料下料的等重下料技术,该项技术系现代光电传感技术及计算机控制技术在传统技术领域的应用.在弹体毛坯生产线上,首次实现了实时、快速、准确的全自动在线下料检测和控制,取代了原有人工下料过程.该项技术在其它制造加工领域也具有广阔的应用前景,对提高劳动生产率,节约原材料具有重要的经济意义.     

中国工程科技的进展与展望

回顾了2007年中国在能源与环境、航天航空、信息产业、制造业、科学仪器和实验装置等工程科技领域所取得的成就,展望了未来工程科技的几大发展趋势.     

Solvation Engineering via Fluorosurfactant Additive Toward Boosted Lithium-Ion Thermoelectrochemical Cells

Lithium-ion thermoelectrochemical cell(LTEC), featuring simultaneous energy conversion and storage, has emerged as promising candidate for low-grade heat harvesting. However, relatively poor thermosensitivity and heat-to-current behavior limit the application of LTECs using LiPF₆ electrolyte. Introducing additives into bulk electrolyte is a reasonable strategy to solve such problem by modifying the solvation structure of electrolyte ions. In this work, we develop a dual-salt electroly...