一种基于宿主机/目标机架构的追踪/重演方法

实时嵌入式系统固有的不确定性使得系统运行具有不可重现性,从而造成系统调试与测试时故障可能无法重现。提出一种基于宿主机/目标机架构的追踪/重演方法来解决实时嵌入式系统运行的不可重现性问题。该方法通过插装探针来追踪系统的任务调度、任务间通信同步以及I/O操作等信息,并自动将系统的执行信息保存到宿主机端,然后通过任务控制模块来控制系统中的任务按照原有的先后顺序来执行,从而实现实时嵌入式系统执行情况的正确回放。目前,该方法已在ML505开发板和uC/OS-II操作系统上进行实现,并已成功应用到IC图像拍摄系统中。通过实验分析表明,该方法能够以较小的时间和空间开销实现实时嵌入式系统运行情况的追踪和重演

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

中国科学院力学研究所高温气体动力学国家重点实验室;

通过环境友好型改性分子筛Cu-Ce/ZSM-5催化剂的优选,实现变参数(烟气成分、烟气温度和烟气流量等)条件下CO自持燃烧转化为CO_2的目的。理化分析结果表明,铜系物种作为活性相富集并高度分散于分子筛的浅层及表面,铜元素以一价和二价形式存在,且随铜负载量的增加,分子筛表面铜离子所占比例增加;而铈系物种富集于分子筛表面呈团聚态,铈元素以三价和四价形式存在。铜离子是CO自持催化燃烧的活性位。随着催化剂表面铜离子浓度的增加,CO起燃温度降低。铈离子的参杂有利于提高催化剂表面氧存储能力,加快催化剂表面CO自持燃烧的反应速率

一种尾气除氨系统的氨气氧化器

本发明公开了一种尾气除氨系统的氨气氧化器，通过在具有进气管道和出气管道的反应室内部安装能够使得气体在反应室内部循环往复流动的导流器，同时将用于催化燃烧反应的催化剂设置在气体循环往复流动的必经途径，通过交替地开闭进气管道和出气管道以获得不受气体流量和流速影响的燃烧室。同时，本发明还公开了一种尾气除氨系统的氨气氧化方法，通过让氨气在反应室内部循环往复流动以反复通过催化剂进行催化燃烧反应，从而提高氨气的催化燃烧效率，同时，还通过在反应室内部气压上升至阈值时排出废气，此时反应室内部的气压较高，在出气管道的瞬间会产生爆裂气流，爆裂气流将吸附在催化剂上的杂质冲出，以清洁催化剂

汽车制造连续高速冲压模具高效散热数值模拟研究

针对汽车钣金冲压制造工艺中金属件与模具连续累积热效应影响产品性能和冲压质量的关键问题，文章进行了连续高速冲压模具高效散热数值模拟研究，建立了流-热耦合三维矩形通道流动传热数值模型，并分析了无量纲压差/压损、无量纲湍动能及表面传热系数等动态参数随无量纲长度变化的规律。结果显示，最高温度点出现在模具与板料界面且靠近中轴线处，最高热点温度达到309 K；局部表面传热系数沿流向先升后降，在无量纲长度为3左右时达到峰值2 700 W/（m2K），并且湍动能扰动越剧烈，换热强度越大。研究证实了主动冷却的高效性

一种光谱在线检测装置及方法

本发明实施例涉及一种光谱在线检测装置，所述装置包括：原位拉曼光路、原位红外光路、固定管、反应腔室和反应气体入口；所述原位拉曼光路、所述原位红外光路与所述固定管两两相互垂直设置在所述反应腔室上，交点位于所述反应腔室的中心；所述反应气体入口与所述固定管的第一管道位于所述反应腔室的同一表面，用于向所述反应腔室内提供气体；所述固定管的第一管道内套装有用于装载待测物的固定器。由此，可以实现原位红外和原位拉曼的在线检测，在线检测特殊条件下的表面反应，并且不干涉表面反应的进行；实时在线精确测量反应物、中间产物及终产物的变化历程，有效提高实验数据的可靠性和对表面反应机理的精确描述

一种冶金行业中CO回收处理的方法及系统

本发明公开一种冶金行业中CO回收处理的方法,其操作简单、快捷，能耗低，副产物少，并能有效回收热能。该方法包括步骤：(1)在低温等离子体反应器中加入颗粒催化剂；(2)打开电源，在低温等离子体反应器上施加电压；(3)在低温等离子体反应器中通入含指定浓度CO的待处理废气；(4)在等离子体化学反应和背景温度升高诱导的热化学反应作用下，CO发展为自持燃烧；(5)关闭电源。还提供了采用这种方法的系统