基于WEB 模式的存储统计监控系统

借助WEB数据库应用技术,也即LAMP(linux、apache、mysql、php)技术构建了具有安全认证功能的统一的存储信息管理平台,在此平台上,通过shell编程实现了用户数据按照时间节点的统计,通过php编程和apache实现了统计信息的发布、更新,通过mysql数据库技术实现了用户过往数据的管理。此外,通过SNMP协议和MIB获取存储设备状态,并通过php编程实现状态信息的发布、更新。     

In-situ composition and luminescence of rare earth coordination polymers/silica/PEG hybrid materials

A two-step sol-gel method was developed with hydrochloride as an acid catalyst for the hydrolysis process and hexamethylenetetramine as base catalyst for the synthesis of terbium and europium coordination polymers with picotinic acid. Luminescent europium and terbium coordination polymers with picotinic acid were incorporated in silica gel/polymer hybrid matrix. In the range of concentration of luminescent species (0.1, 0.3, 0.5, 1.0, and 2.0 wt %), emission intensity increases with the increase of composition concentration, and no concentration quenching takes place. The text was submitted by the authors in English.     

Improvement in the volume efficiency of multilayered ceramic capacitors (MLCCs)

An attempt was made to improve the conventional lamination process in the multilayered ceramic capacitors (MLCCs) fabrication by adapting a solvent treatment on the BaTiO₃ green sheets. During the lamination process, additional particle rearrangement in the BaTiO₃ green block was stimulated by solvent treatment. This rearrangement resulted in a more compact structure of the BaTiO₃ green sheets compared to that obtained through the conventional lamination process. The overall thickness of BaTiO₃/Ni/BaTiO₃ laminates was also reduced after solvent treatment. It is suggested that miniaturization in the fabrication of MLCCs can be improved by adapting a solvent treatment during the lamination process.     

G.729A+B语音编解码在新一代定点DSPs上的实现

文章介绍了ITU-TG．729A算法与ITU-TG．729B算法配合使用的语音编解码方案，并讨论了其在TI公司最新一代定点数字信号处理器(DSPs)TMS320C6416上实现的关键技术。G．729A是G.729编码器的简化版本，G．729B是带VAD(活动话音检测)的静音压缩算法。两者结合可以有效地降低码率，同时保持很好的合成语音质量。     

100吨电炉自动控制系统设计及改进

本文介绍了安钢100吨电炉两级自动控制系统的设计方案，详细阐述了一级、二级自动控制系统的配置和功能，对于系统运行中出现的问题，提出了改进方案。     

Molecular dynamic study for nanopatterning using atomic force microscopy

The atomic force microscopy (AFM)-based nanolithographic technique is currently used to directly machine material surfaces and fabricate nanocomponents for microelectromechanical systems (MEMS) devices. In the current study, three-dimensional molecular dynamic (MD) simulations with potentials based on the Morse function were performed to evaluate the effect of crystallographic factors and process variables on the nanodeformation characteristics of the nanolithography processing of monocrystalline copper. Moreover, the effects of process variables (tool shape, cutting speed, and ploughing depth) on the nanostructural pattern are investigated. The simulation results revealed that the crystal orientation and ploughing direction had a significant influence on varying the forces (cutting force, thrust force, and width-direction force); the nature of the nanodeformation ahead of the tool; and the surface quality of the machined material.     

Approaches to large-scale urban modeling

Large-scale urban modeling technologies use a variety of sensors and data acquisition techniques. The authors categorize current approaches and describe their advantages and disadvantages. Their survey examines current research with respect to several performance criteria including data acquisition sources, user interaction level, geometric fidelity, model completeness, and intended applications. Although modeling systems vary with respect to these criteria, data acquisition strongly influences model characteristics and usefulness. We therefore cluster the methods into those based on photogrammetry, active sensors, and hybrid sensor systems.     

Odyssey: a high‐performance clustered video server

Video servers are essential in video‐on‐demand and other multimedia applications. In this paper, we present our high‐performance clustered CBR video server, Odyssey. Odyssey is a server connecting PCs with switched Ethernet. It provides efficient support for normal play and interactive browsing functions such as fast‐forward and fast‐backward. We designed a set of algorithms for scheduling, synchronization and admission control, which results in a high utilization of resources. Odyssey is able to deliver a large number of video streams. Copyright © 2003 John Wiley & Sons, Ltd.     

安钢高强板AH60的生产实践

本文论述了高强度低合金钢板AH60的试制过程，结合产品技术要求和生产实际设计合理的成分体系和工艺路线。     

Influence of calcination temperature on structural and optical properties of TiO2-SiO2 thin films prepared by sol-gel dip coating

We prepared TiO₂-SiO₂ thin films with various TiO₂/SiO₂ ratios by sol-gel dip coating method and explored the dependence of their structural and optical properties on calcination temperature. The absorption peaks relevant to Si—O, Si—O—Ti and Ti—O bonds appeared in the FTIR spectra. With increasing TiO₂ content, the intensity of Si—O bond peaks decreases and that of Ti—O bond peaks increases. The XRD results show that the temperature of transformation from amorphous to anatase phase is lowered as TiO₂ content increases. The crystallite size of anatase phase in composite thin films increases with increasing TiO₂ content and calcination temperature. At 1000°C, the mixed phase of anatase and rutile appears in the pure TiO₂ thin films. The rutile films are denser than the anatase films. The increase in refractive index of composite thin films with calcination temperature is related to the decreased thickness and increased density as a result of evaporation of water and organic matters below 400°C. On the other hand, it is related to the change in the crystal phase and crystallite size of the films over 400°C.