A COS Design for Smart Card with two Communication Interfaces

本文针对当前人们面对种类繁多的集成电路（IC）卡的携带不便性问题，以及手机的使用愈加广泛、人们对手机的依赖性逐步增强的背景，提出了双界面多应用的新型SIM卡--RF-SIM卡的设计。RF-SIM卡是一款双界面（具有ISO/IEC7816接触式通讯通道及RF2.4GHz非触式通讯通道）多应用的SIM卡，其通过在传统SIM卡电路上增加2.4GHz射频模块获得了非接触式通讯方式，从而可以在其上开发除电信应用以外的其他基于非接触式通讯方式的应用，由此实现SIM卡的一卡多用。本文通过对RF-SIM卡硬件原理、软件架构以及命令处理步骤的分析，阐述了RF-SIM卡操作系统（COS）的传输管理、安全管理、应用...Nowadays, mobile phone becomes more and more popular and people greatly rely on it. To resolve the inconvenience to taking plenty kinds of IC cards, this paper brings forward the RF-SIM design which is a new SIM card for dual interfaces and multi applications. RF-SIM is a kind of SIM card with dual interface (ISO/IEC 7816 contact mode communication channel and RF 2.4 GHz non-contact communication ...学位：工程硕士院系专业：信息科学与技术学院电子工程系_仪器仪表工程学号：X20032901

奇异摄动小参数上界的求法

研究了在线性连续奇异摄动系统中奇异摄动小参数的选取方法.提出了一种求该系统稳定性界的新方法,由实例可知这种方法比起原有的方法简便可行.国家自然科学基金(11471271)福建省自然科学基金(2017J0101)中央高校基本科研业务费专项(20720160037

Analysis on Hydrocarbons Pollution in Vehicle Exhausts in Xiamen City

[摘要]：通过厦门市仙岳隧道实验建立了厦门市机动车尾气源饱和烃( 正构烷烃、甾萜类化合物等) 及多 环芳烃等主要烃类污染物的特征排放谱, 得出厦门市隧道尾气PM10 中PAHs 的苯并[ a ] 芘等效毒性 (BEQ) ( 3. 99) 约为厦门城市大气的2. 5 倍, 对人体健康威胁更大. 同时估算出汽油车和柴油车对厦门大气 机动车尾气排放PAHs 的贡献率分别约为70%和30%.[Abstract]:Tunnel study was carried out in Xianyue tunnel in Xiamen city to characterize the emission of saturated hydrocarbons and polycyclic aromatic hydrocarbons ( PAHs) from vehicles. The contents and the profiles of these pollutants were given in this paper. T he value of BEQ of PAHs in Xianyue tunnel air was 3. 99, which was about 2. 5 times that in Xiamen City which brought higher threat to human health. Results showed the contributions of emission from gasoline-engined vehicles and diesel-engined vehicles to the PAHs in Xiamen city air have been quantified to be about 70% and 30%.国家自然科学基金资助项目( 202777060) ; 成都信息工程学院引进人才科研启动项目基金资助( KYTZ200806

Characteristics of PAHs in PM_(10) aerosols collected from different districts in Xiamen

2004年冬季在厦门市4个不同功能区连续10d采集并分析了PM10中16种优控多环芳烃(PAHs).研究发现,各个功能区大气PM10中多环芳烃总浓度(ΣPAHs)存在明显差别工业区(湖里)10.87~27.54ng·m-3、旅游区(鼓浪屿)7.79~21.14ng·m-3、居民区(洪文)6.52~13·39ng·m-3、森林区(小坪)5.20~11.43ng·m-3;但各个功能区PM10中各种PAH化合物的相对组成趋于一致,所占比例最高的前4种化合物为菲、芘、和芴,表明冬季不同功能区PM10中PAHs的主要污染来源在很大程度上相似或相同.根据典型污染来源中特征化合物比值如苯并(a)蒽/、荧蒽/芘和芘/苯并(a)芘及其有机碳/元素碳的值,推断厦门市PM10中的PAHs主要来源于汽车尾气的排放. 【英文摘要】 An intensive sampling program has been undertaken in the absence of precipitation at four different sites, Xiamen, to characterize the atmospheric concentration of 16 priority polycyclic aromatic hydrocarbons in PM_ 10 aerosols during 2004 winter. There was significant difference in the average value of ΣPAHs (defined as the sum of 16 PAH compounds) during the sampling time among four sites. ΣPAHs value is as follows: Huli at 10.9~27.5 ng·m -3 , Gulangyu at 7.8~21.1 ng·m -3 , Hongwen at 6.5~13.4 ng·m -3 , a...国家自然科学基金项目(No.40476048)~

RE-X二元合金相图的热力学数据库

利用CALPHAD方法,采用亚正规溶体模型、亚点阵模型以及理想气体模型来描述RE-X(Ag,Bi,Cr,Mn,Mo,V,Zn)中二元系各相的Gibbs自由能,并结合相平衡及热力学性质的实验结果,对Ag-RE(RE:Sc,Y,Nd,Sm,Gd,Tb,Ho,Er)、Bi-RE(RE:Nd,Tm,Er,Ho,Pr,Gd)、Cr-RE(RE:Ce,Nd,Sm,Lu)、Mn-RE(RE:Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb,Lu)、Mo-RE(RE:Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Tb,Dy,Ho,Er,Tm,Yb,Lu)、V-RE(RE:La,Ce,Pr,Nd,Ho,Lu)和Zn-RE(RE:Y,Ce,Pr,Nd,Sm)各二元系相图进行热力学优化与计算。计算结果与实验数据取得很好的一致性,并结合其他相关稀土二元系相图热力学计算,初步建立部分稀土二元合金相图的热力学数据库。该热力学数据库可以提供相平衡及热力学性质等多种信息,为外推计算稀土多组元体系的相平衡提供理论基础,并为高性能稀土合金材料的设计及制备提供重要的理论指导

小槐花的化学成分研究

目的:系统研究中药小槐花中的化学成分。方法:利用大孔树脂,Sephadex LH-20,ODS及正相硅胶柱等色谱手段进行分离,通过多种波谱学数据分析进行化合物的结构鉴定。结果:从小槐花60%乙醇提取物中分离得到15个化合物,经结构鉴定分别为豆甾醇(1),β-谷甾醇(2),柠檬酚(3),黄槿酮A(4),异柠檬酚(5),kenusanone I(6),neophellamuretin(7),清酒缸酚(8),古柯三醇(9),黄槿酮D(10),山柰酚(11),8-prenylquercetin(12),leachianone G(13),5,7,4'-三羟基-二氢黄酮醇(14),4H-1-benzopyran-4-one,2-(3,4-dihydroxyphenyl)-2,3-dihydro-3,5,7-trihydroxy-8-(3-methyl-2-butenyl)-,(2R-trans)-(9CI)(15)。结论:除化合物8外,所有化合物均为从该种植物中首次分离得到

Thermodynamic assessments of the Bi-Nd and Bi-Tm systems

通讯作者地址: Liu, XJ (通讯作者), Xiamen Univ, Dept Mat Sci & Engn, Coll Mat, 422 Siming S Rd, Xiamen 361005, Fujian Peoples R China 地址: 1. Xiamen Univ, Dept Mat Sci & Engn, Coll Mat, Xiamen 361005, Fujian Peoples R China 2. Xiamen Univ, Res Ctr Mat Design & Applicat, Xiamen 361005, Fujian Peoples R China 3. Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400045, Peoples R China 电子邮件地址: [email protected] using the calculation of phase diagrams (CALPHAD) method, the thermodynamic assessments of the Bi-Nd and Bi-Tm systems were carried out based on the available experimental data including thermodynamic properties and phase equilibria. Gibbs free energies of the liquid, hcp, bcc, dhcp and rho phases in the Bi-Ncl and Bi-Tm systems were modeled by the subregular solution model with the Redlich-Kister formula, and those of the intermetallic compounds (BiNd2, Bi3Nd5, Bi3Nd4, BiNd, Bi2Nd, BiTm and Bi3Tm5 compounds) in these two binary systems were described by the two-sublattice model. An agreement between the present calculated results and experimental data was obtained. (C) 2010 Elsevier B.V. All rights reserved.National Natural Science Foundation of China 50725413 Ministry of Education, PR China 707037 National Basic Research Program of China 2007CB613704 Ministry of Science and Technology, PR China 2009AA03Z101 Fujian Province and Xiamen City Departments of Science and Technology 2009I0024 3502Z2009300

Study on the gasification of scrap tyre

published_or_final_versionMechanical EngineeringDoctoralDoctor of Philosoph

基于ANSYS的18CrNi8齿轮激光淬火温度场分析

针对重载汽车大模数齿轮的表面激光淬火工序,进行ANSYS有限元温度场分析。主要有三维模型的建立、载荷的施加方法、移动热源命令流编写、纵切面温度分布处理、硬化层深度确定等。综合应用ANSYS的后处理方法,分析了加工中热流的流动情况、热源扫描路线表面的代表性节点和沿深度方向节点的温度变化、以及激光光斑前后表面温度差别较大的原因（暂称为"热流堆积效应"）及解决方案。分析结果表明对齿轮齿面进行激光淬火可以达到较好效果,并通过试验验证了模拟结论

锰含量对LiNi_(0.85-x)Co_(0.15)Mn_xO_2结构及形貌的影响

采用共沉淀法先合成出氢氧化物前驱体Ni0.85-xCo0.15Mnx(OH)2,其中X=0、0.1、0.2和0.4,前驱体与Li2CO3在空气气氛中固相烧结制得正极材料LiNi0.85-xCo0.15MnxO2。用XRD、SEM研究了锰含量对材料结构和形貌的影响。研究发现,LiNi0.85Co0.15O2的X射线衍射图中存在微量第二相,而锰掺杂有利于减小反应过程中锂离子损失和镍离子占据锂位,容易形成有序层状结构材料。随着Mn离子替代Ni离子量的增加,晶胞参数a减小,晶胞参数c、c/a及I003/I104值增大。SEM结果表明前驱体和最终产物形貌均随锰含量增加颗粒均匀性增强,粒子尺寸变小,粒径分布变窄