MIL-53的合成和表征及储氢性能研究

采用水热合成法将对苯二甲酸（H2BDC）、水分别与Cr（NO3）3.9H2O、Al（NO3）3.9H2O混合后加热至220℃晶化3d,合成了具有三维立体网状骨架结构的有机金属骨架MIL-53（Cr）as与MIL-53（Al）as,将其分别在300、330℃下煅烧3d得到有机金属骨架MIL-53（Cr）ht与MIL-53（Al）ht。通过X射线衍射（XRD）、智能重量分析仪（IGA）、扫描电镜（SEM）、红外光谱仪（IR）和热重分析仪（TG）等表征手段系统地对它们的结构、组成以及储氢性能进行了研究。实验结果表明,有机金属骨架MIL-53系列独特的骨架呼吸特性使其具有良好的储氢性能,且具有较高比表面积、孔容及孔径的MIL-53（Al）在储氢性能方面具有更好的表现。     

电弧喷涂马氏体不锈钢涂层耐磨性

为了系统地研究电弧喷涂马氏体不锈钢涂层的耐磨粒磨损性能,选用几种不同含碳量的马氏体不锈钢作为喷涂材料,制备了不同喷涂工艺参数的试件;采用喷砂吹蚀和湿砂橡胶轮磨损试验研究了涂层试件的耐磨粒磨损性能.试验结果表明,随着喷涂材料w（C）的增加,获得的涂层硬度增加,涂层耐磨粒磨损性能也随之增强.涂层制备的工艺参数对涂层的耐磨性影响很大,增加喷涂电流,涂层耐磨粒磨损性能提高;增加喷涂电压或加大喷涂距离,涂层耐磨粒磨损性能下降.     

胶印机色墨转换实验及数据库开发

在胶印机色彩检测与控制系统中,色墨转换实验数据对色墨转换算法的研究及色彩控制的准确度具有重要的作用.开放式色墨转换工艺数据库便于用户根据自己的需要添加新的色墨转换数据,提高色彩检测与控制系统的通用性及控制精度.在确定色墨转换实验方案的基础上,在北人集团的对开四色胶印机上进行了色墨转换实验;综合考虑影响色墨转换实验的各因素,设计了色墨转换工艺数据库;并采用Visual C++及MySQL开发了开放式色墨转换工艺数据库管理系统,用户可以方便地进行数据的查询、添加、删除及修改等操作.     

四叔丁基萘酞菁氧钒非线性及光限幅特性

为提高酞菁化合物的非线性光学性能,以1,8-二氮杂双环[5.4.0]十一碳烯-7(DBU)为催化剂,采用液相法合成了四叔丁基萘酞菁氧钒((t-Bu)4NcVO)化合物.利用元素分析、红外光谱、核磁共振氢谱方法,验证了化合物的分子结构.应用调Q倍频ns/ps Nd∶YAG脉冲激光系统,在波长为532nm下,研究了化合物的非线性和光限幅特性.测得化合物的非线性折射率n2和三阶非线性极化率χ(3)分别为2.51×10-11esu和8.54×10-12esu,通过计算得到分子极化率γ’为3.7×10-29esu.在透过率69%时限幅阈值为1608mJ/cm2,箝位值为585mJ/cm2,有效激发态与基态吸收截面比为3.66.     

Simulation and optimization of SOFC-BCHP system

As the prime motor of dispersed energy system, the high-temperature solid oxide fuel cells (SOFC) are high efficient with large heat recovery. This study presents a simulation of SOFC building-based cooling, heat and power (BCHP) system, which can meet basic requirements in power and heating (cooling) of the designated customers. The peak power load can be met by power grid, while the peak heating (cooling) load requirement can be met by backup equipments. In order to solve the economic dispatch problem of the energy system, a restricted nonlinear optimization model has been developed. The production costs can be minimized via both the equality constraints of customer’s heat and power demands, and other inequality constrains of equipments’ capacities. The sequential quadratic programming method has been used to search the solution. The study indicates that the model can be used to optimize the system’s capacities and run strategy. An office building case has been computed, and it is indicated that the model can be served in design and optimization of SOFC-BCHP system.     

Influence of nitrogen hetero-substitution on the electrochemical performance of coal-based activated carbons measured in non-aqueous electrolyte

Nitrogen-containing carbons were prepared by modification of activated carbons. The modified carbons were used as electrode materials with improved electrochemical performance. Precursor anthracite was activated by KOH (KOH: anthracite= 1:1), modified by melamine or urea and then treated at 1173 K to obtain the modified carbons. The porous structure, the chemical composition and the electrochemical characteristics of the carbons were investigated by nitrogen sorption, XPS and electrochemical methods respectively. Electrochemical experiments were performed in an organic electrolytic solution of 1 M (C2H5)4NBF4/PC.The samples modified by the different methods showed differences in chemical composition that introduced varying degrees of electrochemical performance enhancement. The presence of nitrogen enhanced the electron donor properties and the surface wettability of the activated carbons: this ensured a sufficient utilization of the exposed surface for charge storage.     

太阳能制冷技术的特点与现状

太阳能制冷具有环保节能的优点．介绍了各种太阳能制冷技术的原理、特点及存在问题,指出提高太阳能的利用效率和降低成本是其实用化的关键所在。     

基于PSS/EBKDY模块的短路电流周期分量计算方法分析

介绍了一种基于电网仿真软件PSS／EBKDY模块的短路电流周期分量计算方法,分别用PSS／E和BPA机电暂态仿真软件对计算结果进行了校核．仿真结果显示,基于PSS／EBKDY模块的短路电流算法有较好的精确度,但该算法的缺点是不够保守,这将影响其在工程短路电流计算上的应用．     

基于网络的多卡加密系统调度模型

在分析L inux系统单卡加密系统的基础上,详细分析了影响单卡加密系统并行处理数据报文效率的原因,提出了一种能够改善报文处理效率的基于网络的多卡加密系统调度模型,讨论了多卡加密系统调度模型的特点,分析了该模型中各模块的功能.通过实例,比较了单卡和多卡加密系统在并行处理数据报文时的差异.结果表明,多卡加密系统调度模型是网络平台下的信息安全传输的一种优化方法.     

引信热电池密封性能检测系统

针对目前引信热电池密封性能检测方法精度低、周期长、通用性差等弊端,研制一种密封性能检测系统．系统采用模块化结构设计,运用负压平衡法,完成小泄漏和大泄漏两个环节检测,并通过计算机对数据实时采集、储存和显示．该系统已经成功应用于某型号引信热电池检测中,大大缩短了检测时间,提高了检测精度,取得了较好的效果．