用于部件检验的快速声学方法——一种测量外购部件内的关键材料性能的新技术。

传统上．声学显微镜用于寻找组件中的分层等内部缺陷。现在．它们被用作快速的材料表征工具来检验外购部件。这类检验是供应链管理的重要内容．对于任何组装公司都非常关键．尤其是无晶圆厂设计公司（fabless）。     

Single stage and double absorption heat transformers used to recover energy in a distillation column of butane and pentane

This paper presents the theoretical analysis of the use of single stage and double absorption heat transformers operating with the water–lithium bromide mixture coupled to a butane and pentane distillation column in a Mexican refinery. A mathematical model of the heat transformers was developed in FORTRAN and integrated as a user model to the Aspen Plus simulation code. Both components coupled to the column were modelled on steady-state conditions. The results show that it is theoretically possible to reduce the energy consumed in the reboiler between 26 and 43% by the use of single stage heat transformer at specific conditions, and between 28 and 33% with double absorption heat transformers for a wide range of operating conditions. Copyright © 2003 John Wiley & Sons, Ltd.     

Hazard Classification of Holding Ponds for Liquid Radioactive Wastes

This paper is devoted to the development of a method for hazard classification of holding ponds at the Industrial Association Mayak, the Siberian Intergrated Chemical Plant, and the Integrated Iron-Mining and Mining-Chemical Plant. The method is based on a combined approach employing the qualitative characteristics and quantitative parameters of the ponds. The classification of holding ponds is intended to be used for developing the requirements for the composition and content of the documentation presented by enterprises for licensing the operation and decommissioning of holding ponds.     

Exponential Stability of Interval Dynamical Systems with Quadratic Nonlinearity

This article proposes an approach for investigating the exponential stability of a nonlinear interval dynamical system with the nonlinearity of a quadratic type on the basis of the Lyapunov’s direct method. It also constructs an inner estimate of the attraction domain to the origin for the system under consideration.     

Microfabricated preconcentrator-focuser for a microscale gas chromatograph

The design, fabrication, and testing of a preconcentrator-focuser (PCF), consisting of a thick micromachined Si heater packed with a small quantity of a granular adsorbent material are described. The PCF is developed to capture and concentrate vapors for subsequent focused thermal desorption and analysis in a micro gas chromatograph. The microheater contains an array of high-aspect-ratio, etched-Si heating elements, 520 /spl mu/m (h)/spl times/50 /spl mu/m (w)/spl times/3000 /spl mu/m (l), bounded by an annulus of Si and thermally isolated from the remaining substrate by an air gap. This structure is sandwiched between Pyrex glass plates with inlet/outlet ports that accept capillary tubes for sample flow and is sealed by anodic bonding (bottom) and rapidly annealed glass/metal/Si solder bonding (top). The large microheater surface area allows for high adsorption capacity and efficient, uniform thermal desorption of vapors captured on the adsorbent within the structure. The adsorbent consists of roughly spherical granules, /spl sim/200 /spl mu/m in diameter, of a high-surface-area, graphitized carbon. Key design considerations, fabrication technologies, and results of performance tests are presented with an emphasis on the thermal desorption characteristics of several representative volatile organic compounds as a function of volumetric flow rates and heating rates. Preconcentration factors as high as 5600 and desorbed peak widths as narrow as 0.8 s are achieved from 0.25-L samples of benzene at modest heating rates. The effects of operating variables on sensitivity, chromatographic resolution, and detection limits are assessed. Testing of this PCF with a micromachined separation column and integrated sensor array is discussed briefly.     

三(明)钢烧结厂电除尘灰的气力输送

三钢烧结厂130m^2烧结机电除尘输灰首次采用了气力输送系统。该系统由气源、输送、管路、灰库及控制五部分组成，本文介绍了系统的工作原理及运行调试情况。系统投产后，运行平稳，达到了设计要求。     

空调风机的特点及合理选型

介绍了空调风机的特点，并通过实例说明了风机合理的选型过程。     

Eye tracking — A new interface for visual exploration

Eye-tracking technology offers a natural and immediate way of communicating human intentions to a computer. Eye movements reflect interests and may be analysed to drive computer functionality in games, image and video search, and other visual tasks. This paper examines current eye tracking technologies and their applications. Experiments are described that show that target images can be identified more rapidly by eye tracking than using a mouse interface. Further results show that an eye-tracking technology provides an efficient interface for locating images in a large database. Finally the paper speculates about how the technology may enter the mass market as costs decrease.