Oil monitoring methods based on information theory

To evaluate the wear condition of machines accurately,oil spectrographic entropy,mutual information and ICA analysis methods based on information theory are presented. A full-scale diagnosis utilizing all channels of spectrographic analysis can be obtained. By measuring the complexity and correlativity,the characteristics of wear condition of machines can be shown clearly. The diagnostic quality is improved. The analysis processes of these monitoring methods are given through the explanation of examples. The availability of these methods is validated and further research fields are demonstrated.     

我国南方农村生活污水处理技术的研发现状

针对农村生活污水直接排放已经成为影响我国农村水环境质量主要因素之一的现状,从适合我国农村的以村落或居民点为单位进行生活污水分散式处理的思维入手,介绍了我国现今主要的分散式生活污水处理技术的原理、特点、不足及其应用现状;继而综合比较了这些技术的技术经济指标,提出了适合我国农村的分散式生活污水处理技术的设计原则;最后提出发展有较高水力负荷,并具备小规模设备化特征和多种生物处理单元复合的创新技术是我国农村生活污水处理技术发展的主要方向。     

Accelerating geospatial analysis on GPUs using CUDA

Inverse distance weighting (IDW) interpolation and viewshed are two popular algorithms for geospatial analysis.IDW interpolation assigns geographical values to unknown spatial points using values from ...     

Formation mechanism of subtrenches on cone-shaped patterned sapphire substrate

In this paper, the cone-shaped patterned sapphire substrates (PSS) were etched by an inductively couple plasma with BCl 3 as the reacting gas. The influence of the operating pressure and the RF bias power on subtrenches of the cone-shaped PSS and the formation mechanism of subtrenches were investigated. The profiles of patterns were characterized by FESEM (field emission scanning electron microscope). It showed that the subtrench size varied with the operating pressure and the RF bias power. As the operatin...     

结合显著度图和自适应能量线的快速图像缩放*

针对Seam Carving图像缩放方法中能量函数的局限性和动态规划算法的复杂性,提出了一种基于图像内容的快速图像缩放方法。结合基于视觉注意力模型的显著度图,完善图像内容的能量描述;同时,提出一种基于图像内容的粗、细能量线自适应机制,与层次加速动态规划一起,加速缩放效率。仿真实验结果表明,该算法在有效保护图像内容的同时,降低了算法的计算复杂度,减少了图像缩放时间。     

环戊基三甲氧基硅烷的合成及应用

由环戊基格氏试剂与四甲氧基硅烷合成环戊基三甲氧基硅烷,方法简单,反应易控制,产率可达75%,纯度98.5%(质量分数)。通过丙烯聚合考核,获得了较为满意的效果。     

介体型水质BOD生物电化学传感器研究进展

生物化学需氧量(BOD)是目前国际上用来衡量水质有机物污染的重要指标之一。由于水体中氧的溶解度非常低,以电子媒介体代替溶解氧为电子受体的介体型BOD生物电化学传感器以其快速、准确、稳定等优点得到了较快的发展。论述了介体型水质BOD生物电化学传感器的发展现状及研究动态,重点讨论了介体型水质BOD生物电化学传感器的工作原理、构成及类型,分析了不同类型传感器的优缺点,并对其核心部分-微生物膜的制备方法做了比较详细的介绍。     

萘啶酸的合成与表征

以2-氨基-6-甲基吡啶、原甲酸三乙酯和乙酰乙酸乙酯为原料,通过缩合反应、热成环反应、乙基化反应和氧化反应,制备得到萘啶酸,并对其进行了红外和核磁表征.对其进行了工艺改进,实现乙基化反应和氧化反应连续操作,提高总收率.     

A novel initial ranging algorithm for OFDMA systems using smart antenna

To improve the capacity of initial ranging （IR） users simultaneously accessing into network and enhance the performance of the IR, a novel IR algorithm is presented for the orthogonal frequency division multiple access systems with the smart antenna. The beamforming weight vectors provided by the antenna array are introduced for the IR users, and the procedures of the multiuser parameter estimation and the interference cancellation are designed. The proposed method can improve the accuracy of the channel estimation of active paths and efficiently reduce the residual multiple access interference. Simulation results show that the proposed method has a much better performance than the available successive multiuser detection and interference cancellation algorithm and accommodates more active ranging users simultaneously accessing into a cell.     

变电站基建施工智能辅助管理系统的开发与应用

结合嘉兴电力局多年电力基建施工管理经验,研究开发变电站基建施工智能辅助系统,用各类信息化科技手段管理变电站施工过程中的质量、安全、标准工艺,提升变电站基建施工水平.