基于CAN总线的混合动力公交车电池管理系统

分析混合动力公交车电池管理系统的主要功能,设计基于CAN总线的分布式电池管理系统。叙述该管理系统的硬件配置及其控制功能的软件实现。运行结果证明,该系统实现了数据监测及显示、CAN通讯、SOC预测、电池热管理和故障诊断及安全报警等功能,保证了电池的安全运行,提高了电池的性能和使用寿命。     

号码携带业务程控工单自动流程再造及实现

对原有号码携带业务自动工单流程存在的问题进行了分析;依据操作的对象将指令分为端局程控和SDC智能业务两部分;每部分又分为装和拆两个环节;增加了新旧物理号码网络属性判断;在设计正向流程及操作的同时,同步考虑反向流程及操作.     

An efficient Sm and Ge co-doped ceria nanocomposite electrolyte for low temperature solid oxide fuel cells

In this study we present a new nanocomposite electrolyte based on samarium (Sm) and germanium (Ge) co-doped ceria Ce_0.7Sm_0.15Ge_0.15O_2-δ (SGeDC). The nanocomposite electrolyte was prepared using co-precipitation method. The crystal structure and surface morphology were determined using x-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Four probe dc conductivity indicated the value of 0.074 S/cm at 650 °C. The Fuel cell performance was carried out using hydrogen as fuel. The maximum OCV observed was 0.95 V while the peak power density came out to be 600 mW/cm² at 600 °C. It is suggested that adding Ge, the conductivity as well as performance of this new nanocomposite electrolyte is comparatively enhanced and it can find potential applications in low temperature solid oxide Fuel cells (LTSOFCs).     

Microstructure evaluation of Ni–SDC synthesized with an innovative method and Ni–SDC/SDC bi-layer construction

Nickel oxide and samaria-doped ceria based anode material (NiO–SDC) for high temperature ceramic fuel cells was synthesized via an innovative, simplified method using the reaction of metal acetates and ethylene glycol. Ni content in the final product was 55 vol% while the Ce:Sm molar ratio in the SDC (45 vol%) was 80:20. The influences of preparation conditions including the calcination temperature and morphology characteristics of the prepared powders as well as the influence of the sintering temperature on the final microstructure of sintered bodies were investigated with EGA, BET, XRD, a heating microscope and FE-SEM. After calcination at 500 °C, the one-step synthesis gave powdered products with the specific surface area of 72.5 m² g⁻¹. The optimal sintering temperature that ensured relatively high sintered densities and excellent contact between grains was found at 1250 °C. After sintering at 1250 °C, the prepared bi-layer system electrolyte/anode showed the highest contiguity, excellent contact between phases and proper porosity (31.2%) confirmed from SEM micrographs.     

低胶凝材料用量的自密实混凝土

采用较低的胶凝材料用量和含有特殊黏度改性剂的聚羧酸减水剂,配制普通强度等级的自密实混凝土(智能动力混凝土,简称SDC).对智能动力混凝土、普通自密实混凝土以及普通强度等级的泵送混凝土进行了新拌性能、硬化后的力学性能和耐久性能的比较.试验结果表明,使用含有RheoMATRIX黏度改性剂的GLENIUM 6000 SDC外...     

基于SOA数据共享技术在装备保障系统中的应用

为解决我军通用装备保障信息化建设中如何保持各应用系统之间数据一致性的问题,在分析了共享数据中心功能的基础上,对SOA以及相关技术进行了研究;根据通用装备保障信息化建设中各应用系统之间的低耦合性以及共享数据中心的可扩展性的特点,提出了一种基于SOA的数据同步技术方案,并且以装备管理系统中的装备基本信息为例,通过使用SOA技术实现与其它应用系统的数据同步。     

以TEA和PAA为分散剂的水基流延SDC

分别以三乙醇胺(TEA)和聚丙烯酸(PAA)为分散剂,用水基流延法制备Sm2O3掺杂的CeO2(Ce0.8Sm0.2O1.9,SDC)陶瓷,研究了pH值对SDCζ电位的影响,分析了SDC生坯的物理性能。TEA和PAA分散的SDC,最大ζ电位绝对值分别为62 mV和49 mV,TEA分散的生坯在基板上铺展得更好,外观更均一,显微结构更均匀、致密,TEA和PAA分散的生坯,相对密度分别为51.7%和46.2%,极限抗拉强度分别为1.25 MPa和1.06 MPa。TEA是SDC陶瓷较好的水基流延分散剂。     

基于SDC的角位置检测在火炮伺服系统中的应用

在计算机控制的数字伺服系统中，采用集成ZSZ—01系列的自整角机-数字转换器（SDC）实现模拟量信号到控制系统数字量的转换。SDC输出的模拟速度信号VEL还可以作为速度反馈信号以构成火炮伺服系统中的速度回路。ZSZ—01利用模拟速度电压输出端VEL来进行轴角转动的方向判别。利用一台自整角机和一个SDC模块可组成一个轴角编码装置，完成轴角的数字检测。该检测装置在某型火炮伺服系统中得到了应用。     

Synthesis and properties of samaria-doped ceria electrolyte for IT-SOFCs by EDTA-citrate complexing method

An ultra-fine samaria-doped ceria (Ce_0.8Sm_0.2O_1.9, SDC) electrolyte prepared by a non-ion selective EDTA-citric complexing method is developed herein for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The rigid agglomerates due to organic compounds that exist in the SDC precursors during the EDTA-citrate complexing synthesis process inhibit crystalline growth and grain growth, leading to the generation of ultra-fine grain following the sintering procedure. Calcination is necessary above 500 °C for all precursors. The average grain size of the pellets after sintering at 1400 °C for 2 h is submicron in scale (from 200 nm to 600 nm) with various pH values, and the pellets are smaller than those obtained from other synthesis processes. Dense pellets with pH values of 10 (relative density of 99%) are obtained with precursor powder calcination at 900 °C for 3 h. Electrical conductivity is dependent on the calcination temperature and pH value of the solution, and the maximum electrical conductivity is 0.01 S cm⁻¹ at 700 °C with a pH value of 10.     

一种超宽带系统OFDM调制模块的设计与实现

给出了一种超宽带系统中OFDM调制模块的设计方法,对于其中的FFT模块,选择了合适的算法并给出了理由,详细介绍了FFT模块的硬件实现。