构件库模糊查询技术研究

本文研究了在构件库管理系统中模糊查询理论,引入新概念,在此基础上给出了一种领域字典库 Ｄ Ｄ Ｄ 的定义、构造算法及构件库模糊查询算法。     

Extracting the optimal dimensionality for local tensor discriminant analysis

Supervised dimensionality reduction with tensor representation has attracted great interest in recent years. It has been successfully applied to problems with tensor data, such as image and video recognition tasks. However, in the tensor-based methods, how to select the suitable dimensions is a very important problem. Since the number of possible dimension combinations exponentially increases with respect to the order of tensor, manually selecting the suitable dimensions becomes an impossible task in the case of high-order tensor. In this paper, we aim at solving this important problem and propose an algorithm to extract the optimal dimensionality for local tensor discriminant analysis. Experimental results on a toy example and real-world data validate the effectiveness of the proposed method.     

基于卡尔曼滤波的InSAR柔性基线距离测量

对于柔性长基线构型的双天线InSAR系统,基线矢量动态偏移产生的误差会降低系统的成像质量,并最终影响高程精度。针对单相机和激光测距仪组合测量系统中如何提高基线距离向精度的问题,提出了一种基于卡尔曼滤波的基线距离测量方法。建立了基线距离向抖动数学模型,在此模型基础上提出了基于卡尔曼滤波的动态测量方法,对该方法进行了动态仿真分析。仿真结果表明,在几十米的测量距离内,该方法能够将基线距离向的测量精度降低到亚毫米量级,是测量基线距离的有效方法。     

业务财务一体化需求分析思路与方法研究

首先介绍电信运营商实施业务财务一体化的外部驱动力及意义,然后介绍3种实施业务财务一体化的需求分析思路与方法,最后给出电信运营商业务财务一体化实施方法建议及对实施难点的探讨。     

Windows映像劫持的分析与防范

本文首先介绍了windows映像劫持的原理,对映像劫持进行了分析.同时根据笔者的日常工作经验总结除了一套比较完善的映像劫持防护方法,具有较强的针对性和实际意义.     

实用运算放大器网络中的虚地性质

本文提出用一个理想电压控制电流源(VCCS)并接于嵌在一个倒相放大器电路中的实际运算放大器(OP.amp)输入端,虚地性质(VGP)可以扩展到使用的运算放大器单位增益带宽那样高的频率.文中给出用真正运算放大器的VCCS的实用电路.用互补变换法可得出非倒相放大电路图.     

CFD在发芽罐空调系统节能改造中的应用研究

针对发芽罐空调系统能耗严重的问题,采用CFD软件Fluent模拟空调系统气流流道流场,通过添加导流板进行气流导流模拟改造。结果表明,气流导流可有效改善气流流场,增大风量或降低能耗,可提高空调系统风量17．9％,提高换热量18．8％,降低风机功耗12．5％,换热量增大6．7％;节能改造投资少、效益高。     

Phase Equilibrium Characteristics of CO2 and Ionic Liquids with [FAP]-Anion Used for Absorption-Compression Refrigeration Working Pairs

The study of the phase equilibrium characteristics of CO₂-ionic liquids(ILs)as new absorption-compression type refrigeration working pairs is of great importance.Three kinds of ILs,i.e.,[emim][FAP],[bmim][FAP]and[hmim][FAP],were chosen as potential absorbents.The solubility of CO₂in these ILs was measured experimentally within 0 to 5.0 MPa at temperatures of 293.15 K to 333.15 K,and the effects of temperature,pressure,IL anion and cation structure and stirring action on CO₂solubility were also discussed and analyzed.The results showed that the longer alkyl chains in an identical IL family,the alkyl fluoride group in IL anions and the stirring action by a magnetic stirrer had positive effects on the solubility of CO₂.In the three ILs,[hmim][FAP]possessed the best performance for CO₂absorption;the solubility of CO₂reached 0.7641 at a pressure of 5 MPa and temperature of 293.15 K,the maximum solubility measured in this work.The CO₂-[hmim][FAP]binary mixture is recommended as a potentially applicable working pair for CO₂absorption-compression refrigeration systems.     

采用超导磁选从白云鄂博矿钾板岩中回收钾长石试验研究

我国长石资源丰富,但富矿资源少,可被直接开采利用的优质钾长石资源并不多,绝大部分需通过富集才能达到工业应用的标准。内蒙古白云鄂博矿床是世界闻名的 Fe-Nb-REO超大型矿床,钾板岩属于白云鄂博矿体上部围岩。在包头钢铁（集团）公司对该铁矿40余年的开采中,已剥离的富钾板岩作为废石在矿区大量堆存,总量超过3.0亿t,每年新增剥离富钾板岩达200万t,白云鄂博矿区钾板岩资源丰富,为提高白云鄂博矿物的综合利用,实现钾长石资源的可持续发展提出从白云鄂博矿钾板岩中回收钾长石。长石矿物常与其他杂质矿物共生,特别是其中的铁等少量杂质元素,影响钾长石精矿的品质和应用。针对内蒙古白云鄂博矿钾板岩,试验的主要目的是确定有效去除高铁钾板岩中铁矿物和云母等硅酸盐类含铁杂质的工艺流程。对白云鄂博高铁富钾板岩进行工艺矿物学分析,确定了“破碎-磨矿-永磁磁选-超导磁选”试验工艺流程,以K2O品位12.66%,Na2O品位为0.6%,TFe品位为5.55%的钾板岩为原矿,在磨矿粒度-0.074mm为92%的条件下,经永磁磁选,超导磁选试验最终得到K2O品位为15.53%,回收率为54.21%,TFe品位为0.55%的钾长石精矿,结果表明利用永磁＋超导磁选工艺可以实现从钾板岩中高效回收钾长石,工艺简单可行,为从白云鄂博矿钾板岩中回收钾长石探索新的途径。