高浓度熟料溶出的工艺研究

优化烧结法生产 ,提高产量、节约能耗是氧化铝生产急需解决的问题之一。实现高浓度溶出可以提高精液浓度 ,减少湿法系统物料流量 ,达到提高产能、增加产量、降低成品成本的目的。本文通过对国内外高浓度熟料溶出发展情况和烧结法影响高浓度溶出的因素进行分析研究 ,提出了提高熟料A/S的必要性 ;指出了适合我国条件的熟料A/S大小和生料配方 ;分析了温度和αk 对溶出和分离的影响机理和规律 ;提出了适合高浓度溶出的溶出条件和浓度大小。对生产有一定的指导意义。     

墙地砖边缘检测中的小波去噪

在墙地砖的边缘检测过程中,噪声的引入是不可避免的,有效地消除噪声而不影响检测结果是检测过程中需要解决的关键问题。本文采用了小波去噪方法—对图像进行去噪后再进行边缘检测的方法,其检测结果较好地满足了检测要求。     

An efficient KPCA algorithm based on feature correlation evaluation

Classic kernel principal component analysis (KPCA) is less computationally efficient when extracting features from large data sets. In this paper, we propose an algorithm, that is, efficient KPCA (EKPCA), that enhances the computational efficiency of KPCA by using a linear combination of a small portion of training samples, referred to as basic patterns, to approximately express the KPCA feature extractor, that is, the eigenvector of the covariance matrix in the feature extraction. We show that the feature correlation (i.e., the correlation between different feature components) can be evaluated by the cosine distance between the kernel vectors, which are the column vectors in the kernel matrix. The proposed algorithm can be easily implemented. It first uses feature correlation evaluation to determine the basic patterns and then uses these to reconstruct the KPCA model, perform feature extraction, and classify the test samples. Since there are usually many fewer basic patterns than training samples, EKPCA feature extraction is much more computationally efficient than that of KPCA. Experimental results on several benchmark data sets show that EKPCA is much faster than KPCA while achieving similar classification performance.     

Conversion measurement in polyethylene/peroxide coupling system under steady shear flow

The coupling reaction of melt linear low density polyethylene (LLDPE) initiated by dicumyl peroxide (DCP) in steady shear flow field was investigated. The conversion of DCP was measured by electron spin resonance (ESR) and chemical titration. An absolute method was proposed to calculate the actual conversion of DCP from rheological data. The coupling efficiency of DCP was obtained from those analyses, which was shown to increase at first, reach a maximum and then decrease in the end stage. A linear relationship between the coupling efficiency of DCP and the concentration of macroradicals was also found in the experiments.     

Improved electrochemical redox performance of 2,5-dimercapto-1,3,4-thiadiazole by poly(3-methoxythiophene)

High electrocatalytic activity of an electropolymerized film of poly(3-methoxythiophene) (PMOT) is reported toward the redox reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) as a promising cathode material for the lithium ion battery. Cyclic voltammetry showed improved electrochemical performance of DMcT on PMOT-coated Pt electrode, indicating accelerated redox kinetics. Moreover, charge-discharge tests exhibited higher discharge capacity and slower capacity fading of the PMOT-doped DMcT composite cathode compared with pure DMcT.     

水运工程施工项目全过程管理的有效性探索

水运工程项目作为我国航运和水利的重要组成部分,其重要性不言而喻。针对现阶段水运工程项目建设和运行过程中存在的管理制度不够完善、施工材料耗损大、技术人员专业知识匮乏等问题,采用全过程管理模式对水运工程项目进行管理。通过分析影响水运工程项目全过程管理的要素,并重点从组织机构管理、质量管理、成本管理、进度管理、安全管理等方面探讨了水运工程项目全过程管理的有效性,明确了提高水运工程项目全过程管理有效性的控制重点,旨在提高企业的经济效益。     

中国狂犬病疫苗CTN-1-V株糖蛋白基因的克隆及序列分析

目的 研究CTN-1-V株糖蛋白(GP)基因结构特性。方法 利用RT-PCR反应从感染CTN-1-V病毒的Vero细胞中获得精蛋白全长cDNA片段,并克隆至PCR2.1载体,进行序列测定。结果 CTN-1-V株糖蛋白cDNA序列长度为1 575个核苷酸,编码524个氨基酸。与国外已测定的相应序列进行同源性比较,其核苷酸同源性为80.8％～92.4％,氨基酸同源性为82.9％～93.3％。结论 进一步了解CTN-1-V株的基因结构,为筛选特异性疫苗株提供理论依据。     

多核DSP的以太网远程程序加载方法

为了解决工业远程控制设备的软件更新带来的成本和效率问题,在研究了以TMS320C6670为核心的DSP系统的结构和程序启动的基础上,提出了基于以太网的DSP程序远程加载方法。该方法主要基于BOOTP协议的广播和以太网UDP协议实现。实践表明,该加载技术灵活可靠,为远程控制系统的调试和更新提供了便利。     

MPPO/PA66合金体系流变性能的研究

研究了MPPO／PA66组成、相容剂用量、加工温度等因素对MPPO／PA66合金体系流变性能的影响。结果表明相容剂用量的增加、加工温度的升高等都能降低体系的粘度，改善其加工流动性。     

基于地图Mashup的水质实时监测系统软件开发

该文介绍了基于地图Mashup的水质实时监测系统的设计,实现了对监测站点各项数据的查询和报表输出,与现场视频信号动态连接进行直观监测,并且能够对监测站信息进行设置,同时系统设计兼顾了良好的用户界面交互性。