利用抛光砖污泥制备微晶玻璃研究

利用65wt%抛光砖污泥等,通过烧结法制备CAS(CaO-Al2O3-SiO2)微晶玻璃,并采用XRD、SEM等研究了抛光砖污泥微晶玻璃的相组成以及微观形貌。研究结果表明,在烧结制度为,核化:950℃保温40min;晶化:1150℃保温120min,可制备出表面光滑细腻平整,有漂亮析晶花纹,结构致密的装饰用微晶玻璃。其力学性能、耐酸碱腐蚀等物理化学性能较好。所得抛光砖污泥微晶玻璃的主晶相是硅灰石(CaSiO3),伴有钙铝黄长石(Ca2Al2SiO7)次晶相;样品析出的晶粒较大,在5～10μm之间;晶粒呈米粒状均匀堆积分布的是硅灰石(CaSiO3)晶体,而片状的晶粒就是钙铝黄长石(Ca2Al2SiO7)晶体。     

Precipitation transformation of rare earth sulfate into chloride with p-dodecylphenoxy carboxylic acids

Methods for transforming rare earth(RE) sulfate into chloride mainly include extraction process with organophosphonic mono-acids or aliphatic acids and precipitation process with ammonium bicarbonate(NH_4 HCO_3).In this paper,alkylphenoxy carboxylic acids(HAs) ofp-dodecylphenoxy acetic acid(HA-Ⅰ),pdodecylphenoxypropanoic acid(HA-Ⅱ) and p-dodecylphenoxybutyric acid(HA-Ⅲ),which were liquid at room temperature were synthesized and characterized.The precipitation mechanisms of RE elements with the HAs were investigated and the HA/RE molar ratios of the solid complexes were determined as3:1 by equi-molar series method which accord with the principle of charge balance.Applicability of HAs for the transformation of RE sulfate from concentrated sulfuric acid roasted RE concentrate into chloride via precipitation method was discussed.100% HA-Ⅱ was selected as the liquid organic precipitant without dilution of volatile solvent soracceleration of phase separation by phase-modifiers.The RE sulfate solution can be precipitated by HA-Ⅱ after neutralization with liquid NaOH and stripped with concentrated HCl at room temperature.High concentration of RE chloride of 218.1 g/L with low residue of sulfate radical of 0.536 g/L was obtained.The residual organic precipitant in the raffinate solution was tested to be lower than 8 mg/L at 25℃and the chemical oxygen demand(COD) in wastewater was less than 50 mg/L.     

档案管理系统存储解决方案

企业档案信息系统是企业信息管理系统中最重要的组成部分之一。企业档案信息系统的可靠性直接关系到企业物流、资金流和信息流的正常运行,可以说现代企业的各项活动一刻也不能脱离企业档案信息系统的有效支持。那么企业档案信息系统中对数据的存储解决方案是否可行、可靠对整个系统的成功构建而言就显得极为重要了,因为不管是文档还是其他类型的资料,只要通过归档流程进行了归档,那么它就变成了档案,就有了档案的特性,就必须妥善的保存起来,只有可靠的存储,才能谈到日后如何来利用这些档案资源来提高企业的经济效益。     

中小有线数字前端CAS、SMS系统的验收测试

本文从实际应用出发,介绍了中小有线数字前端CAS、SMS系统的测试验收方法。     

网络会议系统中密钥交换实现方案

针对网络会议系统的认证阶段提出了一个密钥交换的解决方案.该方案的特点是基于直线的二维特性,从而减少了服务器、网络会议发起端/接收端的计算量,在保证网络会议安全的前提下提升了效率.     

Automated generation of contrapuntal musical compositions using probabilistic logic in Derive

In this work, we present a new application developed in Derive 6 to compose counterpoint for a given melody (“cantus firmus”). The result is non-deterministic, so different counterpoints can be generated for a fixed melody, all of them obeying classical rules of counterpoint. In the case where the counterpoint cannot be generated in a first step, backtracking techniques have been implemented in order to improve the likelihood of obtaining a result. The contrapuntal rules are specified in Derive using probabilistic rules of a probabilistic logic, and the result can be generated for both voices (above and below) of first species counterpoint.     

提升CA系统安全性的深度探讨

自从数字电视全面推广以来,关于数字电视CA系统被破解的案例层出不穷.多年来,CA系统破解与防破解的博弈从未间断,一些研究报告认为现行的CA系统以不能满足安全需求,必须大力推广下载式CA.针对现行CA系统是否能够满足安全需求,下载式CA能否拯救现行的CA系统这两个问题进行了认真思考,并就提升CA系统安全性提出新的设想.     

铬天青S分光光度法快速测定工业循环水中微量铝

建立了测定工业循环水中微量铝的铬天青S（CAS）分光光度检测方法。通过实验得到了测定的最佳条件,并寻求到消除氟、铁、铜干扰的解决方法。此方法被成功用于某热电厂冷却循环水处理前后的微量铝含量变化的测定,结果显示测定的相对标准偏差在0．84％～2．44％之间,而加标回收率则在94．9％～103．0％之间,具有良好的重现性和准确性。     

A new theory branch for finance market study —Computational experimental finance review and synthesis

This paper provides a detailed synthesis of the computational experimental finance from four parts. （i）its theoretical basis-CAS （Complex Adaptive System） theory, （ii） the approach and method used for financial market study, （iii） research results-a number of valuable literatures review （iv） the existing problems and further research directions of this subject. Based on the challenge to the standard finance theory, the computational experimental finance is an exciting new field because it integrates CAS theory with computer technology and intends to reveal the macroscopic features of finance market from the penetration of the microscopic behaviors of investors by constructing the agent-based artificial financial market model The synthesis has prevalent meaning of guidance for new researchers allowing them to learn systematically more about the computational experimental finance.     

MHT算法及其在条件接收系统中的应用

条件接收系统是一种通过对视频数据加扰以及对加扰算法所使用的密钥进行多重加密的综合性系统,可以满足视频数据的高安全性要求。但如今普遍采用的通用加扰算法结构复杂,成本较大。引入了一种全新的MHT(Multiple Huffman Tables)算法作为条件接收系统中的加扰算法,并研究了该算法的加密原理及实现方法。