Carbon deposition in porous nickel/yttria-stabilized zirconia anode under methane atmosphere

A commercial solid oxide fuel cell with a Ni/YSZ anode was characterized under a pure methane atmosphere. The amount of deposited carbon increased with an increase in temperature but decreased when the temperature exceeded 700°C. The reactivity of carbon decreased with increasing deposition temperature. Filamentous carbon was deposited from 400 to 600°C, whereas flake carbon was deposited at 700 and 800°C. With increasing temperature, the intensity ratio of the D band over the sum of the G and D bands was constant at the beginning and then decreased with the transformation of the carbon morphology. The crystallite size increased from 2.9 to 13 nm with increasing temperature. The results also indicated that the structure of the deposited carbon was better ordered with increasing deposition temperature. In comparison with pure Ni powders, the interaction between the YSZ substrate and Ni particles could not only modify the carbon deposition kinetics but also reduce the temperature effect on the structure and reactivity variation of carbon.     

Internet-based event synchronization communication driven telerobotics

1.INTRODUCTION Teleoperationmakeshumansensetoremotesiteand byitmanyapplicationcanbeappliedintoreality.A longdistanceteleoperationmayhavemuchmore meaningtopeople.Throughspace,sea,andnet work,teleoperationshowsitscharm.Whenrobotis inducedinteleoperationastheexecutoritisnamedas telerobotics.NowInternetisprevalentintheworld,overitconstructingateleroboticshasmuchmoread vantagethanothers,likeconstructingeasily,cheap costandmaintenanceconvenientlyetc.Butthereare alsosomedrawbacksinit,liketimede…     

实用航班计划优化方法

本文作者从理论与实践的结合上研究航班计划优化问题,从我国国情出发建立了数学模型,指出其系数矩阵具有稀疏性和非零元素具有对角方块结构。以盈亏平衡客座利用率为依据,把大型问题的线性规划最优解整数化,使航班计划优化具有可操作性。     

Novel magnetic field computation model in pattern classification

Field computation, an emerging computation technique, has inspired passion of intelligence science research. A novel field computation model based on the magnetic field theory is constructed. The proposed magnetic field computation （MFC） model consists of a field simulator, a non-derivative optimization algo- rithm and an auxiliary data processing unit. The mathematical model is deduced and proved that the MFC model is equivalent to a quadratic discriminant function. Furthermore, the finite element prototype is derived, and the simulator is developed, combining with particle swarm optimizer for the field configuration. Two benchmark classification experiments are studied in the numerical experiment, and one notable advantage is demonstrated that less training samples are required and a better generalization can be achieved.     

How Does the General Output Quantity Distribution of Suppliers Affect the Value-appropriation of Supply Chain？

This paper studies the problem of value-appropriation of supply chain, which is composed of a monopoly manufacturer downstream and multiple suppliers upstream. Firstly, we introduce two special examples in which output distribution of suppliers satisfy equal or equal-difference sequence. It is found that the more difference the distribution will be, the less preference will be gain by the manufacturer in the value-appropriation of supply chain. For the general distribution, the parameter ＂competitive residual＂ is introduced to score the influence of the suppliers＇ output quantity distribution on manufacturer＇s preference. The general conclusion will be given and it can directly deduce the conclusions above. Finally, we extend our basic conclusion to the more general situation in which the numbers of suppliers are not equal.     

表面张力对液气临界点相变比热跃变的影响

研究了表面张力随温度的变化对液气临界点相变时比热跃变的影响，得到了考虑表面张力随温度变化的影响时定压比热和定容比热跃变的新公式。     

无线音频传输式语言教学系统的研制及教学实践

提出简易无线音频传输式语言教学系统的构成，并阐明如何优化系统性能，提高信噪化     

金属有机络合物共混二苯酮型聚酰亚胺气体分离膜材料的研究

在二苯酮型聚酰亚胺中混入过渡金属有机络络合物添加剂，制备出了新型气体分离膜材料，并研究了添加剂对聚酰胺膜结构和各项性能的影响。结果表明，添加剂的加入不影响膜材料的机械性能、耐热性能和耐溶剂性能，但增大了聚合物分子链的间距和自由体积，并使气体的透过速率得以提高而气体的透气选择性变化不大。这说明添加过渡金属络合物是改进气体分离膜性能的有效手段。     

塔城垦区甜菜低产徘徊原因及其对策

针对塔城垦区甜菜低产的主要问题 ,进行了调查分析 ,对今后产量提高提出了相应的措施     

孤对电子的物理效应和化学效应

本文通过对孤对电子效应的研究来阐明孤对电子在分析结构和化学反应上的重要性。