分布式实时在线监测系统在产品安全检测中的应用

虚拟仪器是基于计算机的仪器,其应用和研究是计算机应用研究的热点.异地检测是产品安全检测实验室亟需面对和解决的问题,网络化虚拟仪器的应用成为必要和可行.论文应用LabVIEW开发了远程控制虚拟仪器的分布式实时在线监测系统,介绍了该系统的体系结构,系统设计以及关键技术,实现了异地控制虚拟仪器测试,为虚拟仪器测试的网络化提供了较高的参考价值.系统采用了底层编程技术屏蔽了底层接口的多样性以及多线程技术的采用,保证了系统运行的可移植、稳定、可靠和高效.实验表明,该系统能够成功地进行本地检测和异地检测

Self-sustained CO Combustion Induced by CuCe0.75Zr0.25Oy Catalysts with Different Pore-forming Methods

CO self-sustaining combustion, induced by a CuCe0.75Zr0.25Oy catalyst, has been confirmed experimentally as an effective strategy to reduce serious environmental pollution and energy waste, which is caused by direct combustion of conventional converter gas in the steelmaking industry. In this paper, the effects of CuCe0.75Zr0.25Oy catalysts prepared by a sol-gel method via three different pore-forming agents (oxalic acid, cellulose and thermal decomposition) were investigated for their catalytic activity of self-sustained CO combustion. Additionally, characterization methods were used to obtain the structural properties of each catalyst. The results obtained show that the CuCe0.75Zr0.25Oy catalyst, as a sol-gel pore-forming agent, prepared from cellulose exhibits the highest activity among the three catalysts. Under the condition of a reaction gas (3% CO+5% O-2/N-2), the T-10 (70 degrees C), T-50 (73 degrees C) and T-90 (78 degrees C) of the cellulose catalyst are obviously lower than those of the other catalysts, where T-10, T-50 and T-90 denote the reaction temperature corresponding to the CO conversion of 10%, 50% and 90%, respectively. The reason is that the cellulose pore-forming agent promotes the formation of a multistage porous structure, which strengthens the synergistic effect between the Cu and Ce catalysts and changes the redox property of the overall catalyst. On the one hand, the strong synergy between CuO and CeO2 adjusts the dispersion and chemical state of copper nanoparticles. On the other hand, the oxygen vacancies generated locate at the copper-cerium interface enhance the ability of oxygen storage and oxygen release of the catalyst

Self-sustained combustion of CO with transient changes and reaction mechanism over CuCe0.75Zr0.25O delta powder for honeycomb ceramic catalyst

A CuCe0.75Zr0.25O delta catalyst was prepared by the sol-gel method and successfully coated on honeycomb ceramic (HC) carrier. The activity of CuCe0.75Zr0.25O delta/HC was determined by the CO-TPO + FLIR, with the results performing that the critical condition for CO self-sustained combustion is 3 vol% CO + 3 vol% O-2/N-2 at 0.5 L/min. As the CO concentration increases from 1 vol% CO to 3 vol% CO, the induction process ( T-15) shifts to rapid ignition with a transient change for the CO oxidation reaction. The furnace temperature for CO self-sustained combustion decreases with increasing the CO and O-2 concentrations. Upon increasing the CO2 concentration, however, furnace temperature is needed to increase and realize CO complete conversion. The thermal stability test combined with SEM + EDX results indicate that the CuCe0.75Zr0.25O delta/HC retains an excellent thermal stability after a 200 h, and the high-temperature region remains at 225 +/- 1 degrees C during the CO self-combustion reaction. The activity of catalyst is reduced slightly after the 200 h test because of the carbon deposition on the catalyst surface, but such a slight deactivation can be eliminated by the air oxidation method. In situ IR results show a competitive adsorption of CO/O-2 and CO2 on the Cu-Ce active sites, indicating that the addition of gaseous CO2 performs an inhibition of CO oxidation. CO preferentially adsorbs linearly at Cu+ sites to form carbonyls that react with lattice oxygen to produce CO2 to release, which can be ascribed to M-K mechanism. The L-H mechanism is less important, which involves the relatively weak reaction of adsorbed CO and adsorbed oxygen on the Cu-Ce active sites to form carbonate species

Y型聚乙二醇干扰素琢-2b注射液治疗HCV基因2/3型慢性丙型肝炎患者疗效和安全性的多中心随机对照试验研究

目的以标准剂量的聚乙二醇干扰素(Peg IFN)α-2a联合利巴韦林作为阳性对照,评价新型试验药物Y型Peg IFNα-2b注射液联合利巴韦林治疗2型/3型慢性丙型肝炎(CHC)患者的疗效和安全性。方法采用多中心、随机开放、阳性药对照的Ⅲ期临床试验,筛选符合要求的2型/3型CHC患者,按照2:1的比例随机分配到Y型Peg IFNα-2b组和Peg IFNα-2a组,同时口服利巴韦林,疗程24 w,停药随访24 w。采用Abbott Real Time HCV Genotype II检测HCV基因型,采用Cobas Taq Man实时定量PCR法检测血清HCV RNA水平。详细记录不良事件。主要疗效指标为持续病毒学应答(SVR),并进行非劣效检验。结果本试验实际入组2型/3型CHC患者255例,实际治疗241例。全分析集(FAS)数据显示,158例试验组和83例对照组患者SVR分别为85.4%(95%CI 79.94%~90.94%)和79.5%(95%CI 70.84%~88.20%,P=0.2402);对符合方案分析集(PPS)人群分析显示,试验组和对照组患者SVR分别为87.9%(95%CI 82.45%~93.27%)和85.9%(95%CI 77.82%~94.01%,P=0.7060),率差的95%可置信区间均符合非劣效标准;对PPS人群分析显示,85.8%受试者获得了早期病毒学应答(RVR),RVR的阳性预测值为90.1%;试验组和对照组不良事件发生率相似,分别为95.6%和95.2%,严重不良事件发生率分别为3.8%和3.6%。结论应用Peg IFNα联合利巴韦林治疗2型/3型CHC患者,新型试验药物Y型Peg IFNα-2b具有与对照药物Peg IFNα-2a相似的疗效和安全性。国家科技部“十二五”重大专项(编号:2012ZX10002-003)；“重大新药创制”十二五科技重大专项(编号:2012ZX09303019)

社会主义市场经济与税制改革

本文阐述社会主义社会经济体制的确立对税收们度改革提出 了新的要求．也为完善税收制度创造了条件。因此，税制改革应 该抓住机遇，迎接挑战．加快改革步伐．加大改革力度．建立一 个符合社会主义市场经济要成的、科学合理的新税制体系。 第一部分．重构就地改革思路。我国现行税制过份强调了税 收的调节作用，因而带来了一系列弊端。在社会主义市场经济条 件下，应当明确市场在资源配置中的基础性地位．税收发挥宏观 调控作用。以优化资源配置。因此，机制改革在微观方商应坚持 中性原地，充分发挥市场的调节作用，同时加强税收的宏观调控 作用。在运用税收经济杠杆对．应遵循其内在创作。否则．税制 改革将地以达...学位：经济学硕士院系专业：经济学院财政金融系_财政学(含税收学)学号：YL00011

基于氮化镓的导模共振滤波器仿真分析

根据严格耦合波理论和等效介质理论,提出了针对C波段、基于半导体材料氮化镓的亚波长导模共振滤波器结构及设计方法。详细探讨了在强调制光栅的高占空比作用下,光栅周期和入射波角度对滤波器反射谱共振波长的影响。在保持滤波效果为高衍射率（共振波长峰值反射率达到99.5%以上）、低旁带和窄线宽的条件下,利用其对入射波角度的敏感性,结合仿真数值提出了一种通过MEMS（微机电系统）平面反射镜调谐入射角角度（04.07°）,从而线性地控制共振波长输出（调谐范围为36nm）,实现峰值半宽高低于0.8nm的C波段可调滤波器

等离子体流化床式自持催化燃烧转炉放散煤气装置

本实用新型实施例涉及一种等离子体流化床式自持催化燃烧转炉放散煤气装置，包括：等离子体壳体、内电极、外电极、颗粒状催化剂、风帽式布风板、多孔卡板、反应气体入口、反应气体出口；反应气体入口位于等离子体壳体侧壁底部，反应气体出口位于等离子体壳体侧壁顶部；内电极穿透等离子体壳体底部，内电极一端位于等离子体壳体内部，内电极另一端位于等离子体壳体外部，外电极位于等离子体壳体侧壁；颗粒状催化剂位于等离子体壳体内部，颗粒状催化剂两侧与等离子体壳体内壁接触式连接，风帽式布风板与颗粒状催化剂底部接触式连接；多孔卡板位于等离子体壳体内顶部，与等离子体壳体内壁接触式连接；内电极一端穿透颗粒状催化剂以及风帽式布风板

Cu-Ce催化剂上CO催化燃烧反应机理研究进展

CO作为大气主要污染物之一,来源较为广泛。工业炉窑、冶金工业以及机动车尾气排放等均会造成CO大量排放,污染环境。催化燃烧技术是公认的有效限制并消除CO的主流技术,可通过引入催化剂的方式实现CO低温高效转化,已在汽车尾气排放、CO优先氧化等低温催化氧化领域形成了产业化应用,且效果显著。Cu-Ce复合氧化物催化剂具有低温高效、寿命长且廉价等优点,成为应用于CO催化燃烧的首选催化剂。综述近年来Cu-Ce体系催化剂上CO催化燃烧反应的研究进展,列举了不同的催化剂制备方法,概括了Cu-Ce催化剂的结构形貌-性能关系与载体-活性组分的强相互作用规律(尺寸效应、界面效应),分析了基于表征技术、原位试验与反应动力学等方法得到的不同反应路径之间的差异,总结出CO催化燃烧微观反应机理。同时根据不同工业废气中CO浓度变化特点,介绍了中国科学院力学研究所高效洁净燃烧课题组近年的相关工作进展,最后对CO催化燃烧反应研究未来发展方向进行了展望。以转炉炼钢过程中产生的转炉放散煤气(CO≤35%)为例,设计制备出低温高效CuCe_(0.75)Zr_(0.25)O_y催化剂,并进一步合成工业级蜂窝陶瓷催化剂,提出了CO自持催化燃烧技术,探究得到宽CO浓度范围(1%～20%)条件下的CO催化燃烧反应规律(诱导阶段、热飞温及热自持阶段),确定了较详细的CO催化燃烧反应路径(M-K和L-H机理)与稳燃机制(贫燃极限、稳燃温度场、换热特性),为转炉放散煤气从所需燃气引燃到自身能量回收利用的双向节能提供切实可行的技术方案。未来CO催化燃烧反应机理研究可从新型高效纳米Cu-Ce催化剂出发,寻找精细的形貌可控催化剂制备方法与规模化生产技术,制得活性位原子利用率高、持久高效的催化剂,采用先进的原位表征试验技术与理论模拟计算方法,深入研究催化剂载体-活性组分相互作用演化规律,开展CO催化燃烧吸附-反应-脱附过程的定性定量研究,以丰富CO催化燃烧安全控制理论,考察长时间复杂烟气环境下催化剂的各项性能,促进工业节能减排的发展

上吸式秸秆气化炉中当量比对气化特性的影响

我国拥有丰富的农作物废弃物生物质资源,生物质气化技术是洁净高效利用生物质能的有效途径。以自行研制的上吸式秸秆气化炉为研究对象,通过实验研究的方法,研究了当量比Φ对该气化炉气化特性的影响。结果表明:在实验工况下,最佳气化当量比Φ为0.25~0.3,此时气化区平均温度在950℃,秸秆气化煤气低位热值平均可达5.98MJ/m3(标准立方米),气化强度达到137.7kg/(m2·h),产气率为1.68m3/kg,碳转化率为86.4%,气化效率为73.3%。当Φ《0.3时,气化煤气焦油含量随Φ增加较缓慢,但当Φ》0.3后,煤气焦油含量迅速提升