构建完整的宽带网络综合计费管理系统

为适应网络发展的需要 ,有线宽带运营商需要通过一套完整的宽带网络计费管理系统 ,从硬件到软件、从前台到后台对各个方面进行管理 ,实现统一、规范、快速的信息化、网络化电脑管理 ,降低运营成本 ,提高工作效率 ,以过硬的服务质量、优惠的价格、丰富的内容吸引用户。     

Preparation of core–shell structured alumina–polyaniline particles and their application for corrosion protection

Polyaniline (PANI) was synthesized by chemical oxidative polymerization of aniline (ANI) in the presence of alumina (Al₂O₃) particles. The polymerization of ANI occurred preferentially on the surfaces of the particles, resulting core–shell structured alumina–polyaniline (Al₂O₃‐PANI) particles. Morphology examination showed that with decreasing of the weight ratio of Al₂O₃/ANI in the reactants, the thickness of the PANI layer increased and changed from an even surface morphology to a particulate morphology. UV–vis and Fourier transformed infrared (FTIR) spectra indicated that there is no chemical interaction between the PANI layer and the Al₂O₃ surfaces. The PANI layer adhered well to the particles and can be used as anticorrosive fillers for polymer coatings. Enhanced corrosion protection performance was achieved for the emeraldine base (EB) form of PANI deposited Al₂O₃ particles (Al₂O₃‐EB) filled epoxy coating on carbon steel in 3.0 wt % aqueous NaCl solution. The particles demonstrate both excellent corrosion protection performance and lower cost, which will be of great importance in practical applications. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 4372–4377, 2006     

ULSI中的铜互连线RC延迟

随着ULSI向深亚微米特征尺寸发展，互连引线成为ULSI向更高性能发展的主要限制因素。由互连引线引起的串扰噪音及RC延迟限制了ULSI的频率性能的提高，同时考虑到电迁移和功率损耗，人们开始寻找新的互连材料；低电阻率的铜互连材料和低介电常数介质的结合可以有效地发送互连线的性能，主要讨论了互连延迟的重要性以及发送和计算延迟的方法。     

强潮河口桩式丁坝减冲促淤效果研究

钱塘江涌潮气势雄伟,世界闻名,但对海塘具有很大的破坏力.该文提出了一种新颖的丁坝型式——桩式丁坝,从现场观测资料对比、实体模型试验和机理分析三个方面,分析桩式丁坝的减冲促淤效果,探究丁坝护滩保塘的机理.与堆石丁坝比较,桩式丁坝具有设计合理、施工简易、坝体内无内压力、有效地减轻了局部冲刷、便于维护检修等一系列优点。桩式丁坝可广泛应用于各类河道整治、海塘保护等工程中.     

试论包装造型设计

阐述包装造型的作用与包装造型在产品中的体现,探索包装造型设计的原理、方法及造型的综合设计.     

Distributed multi-join query processing in data grids

Query processing in data grids is a difficult issue due to the heterogeneous, unpredictable and volatile behaviors of the grid resources. Applying join operations on remote relations in data grids is a unique and interesting problem. However, to the best of our knowledge, little is done to date on multi-join query processing in data grids. An approach for processing multi-join queries is proposed in this paper. Firstly, a relation-reduction algorithm for reducing the sizes of operand relations is presented in order to minimize data transmission cost among grid nodes. Then, a method for scheduling computer nodes in data grids is devised to parallel process multi-join queries. Thirdly, an innovative method is developed to efficiently execute join operations in a pipeline fashion. Finally, a complete algorithm for processing multi-join queries is given. Analytical and experimental results show the effectiveness and efficiency of the proposed approach.     

改良可逆性局灶性脑缺血模型建立

目的改良大鼠可逆性大脑中动脉缺血模型的栓子制作方法,增加模型稳定性和成功率,提高脑缺血实验研究结果的可靠性.方法体重280～320g Wistar雄性大鼠60只,随机分成改良组和对照组,每组30只.对照组用尼龙线一端加热法制作传统栓子,改良组用尼龙线一端沾silicone胶法制作改良栓子.两组模型除栓子制作方法不同外,其他手术步骤完全相同.采用Zea Longa 5分制法进行模型的神经功能评分,采用TTC染色法测量并计算梗死灶的大小.比较两组模型制作成功率、成功模型中神经功能评分3、4级大鼠所占百分数,以     

数字电视测试信号

本文指出生成视频数字电视测试信号需逐个像素计算各分量信号值，为此建立了它们的数学模型，并用计算机予以实现。与传统方法相比，更加精确，便于应用、修改、增删、存储和交换。本文还提出和生成了测试数字电视或二维、三维信号处理电路性能的测试信号。     

基于Zigbee的智能电器管家设计与实现

采用嵌入式系统技术,以UP-TECH270-S为硬件开发平台,在linux操作系统上,以qt-embedded-linux-opensource4.5为应用程序框架,设计和开发一套智能家电管家终端系统。系统主要基于Zigbee无线传输、GPRS技术和红外传输技术。该系统不仅具有传统智能家居控制家电的功能,而且具有以下优点:利用无线传输协议发送控制信号,免去布线烦恼;使用设备性价比高、简单,适合于生产线批量生产。该系统具有可靠性高、实用性强等特点,有一定的市场应用前景。