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Internal circulating fluidized bed incineration system and design algorithm

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Journal of Environmental Sciences 2001年第2期13卷 185-188页

作者： tian wen dong WEI Xiao lin LI Jun SHENG Hong zhi ESTC Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

The internal circulating fluidized bed (ICFB) system is characterized with fast combustion, low emission, uniformity of bed temperature and controllability of combustion process. It is a kind of novel clean combustion system, especially for the low grade fuels, such as municipal solid waste(MSW). The experimental systems of ICFB with and without combustion were designed and set up in this paper. A series of experiments were carried out for further understanding combustion process and characteristics of several design parameters for MSW. Based on the results, a design routine for the ICFB system was suggested for the calculation of energy balance, airflow rate, heat transfer rate, and geometry arrangement. A test system with ICFB combustor has been set up and the test results show that the design of the ICFB system is successful.

关键词： fluidized bed ICFB MSW

Effects of returns on composition,microstructure and mechanical properties of GH4169 superalloy

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China Foundry 2017年第4期14卷 244-250页

作者： Yong-liang Pu Sheng-zhong Kou Zhi-dong Zhang tian-wen dong Xiao-fan Guo Hong-xia Qu State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou Universityof TechnologLanzhou 730050China Key Laboratory of Non-ferrous Metal Alloys and Processing of the Ministry of Education Lanzhou University of TechnologyLanzhou 730050China

To recycle the returned alloy effectively, effects of returns proportion on alloy composition, microstructure and compression properties of superalloy GH4169 were studied by means of scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and thermal-mechanical simulator. The results show that returns addition has no significant effect on the main alloy elements content and the principle precipitates, but increases the volume fraction of Al_2O_3 inclusions, resulting in the increase of oxygen level of GH4169 alloy. Returns addition does not change the elastic and plastic deformation process at room temperature or at 1,150 °C, but high returns proportion GH4169 alloy shows improved compression strength and yield strength. The alloy with 100% returns shows a maximum compression strength 1,153.45 MPa at room temperature, while the alloy with 80% returns has a maximum value 69.3 MPa at 1,150 °C. Returns addition increases fluctuation range and reduces the stability of yield strength and compression strength of GH4169 alloy at room temperature. It is noted that the volume fraction and the size of Al_2O_3, and the fraction of Laves phase reach their maximum values in the GH4169 alloy with 60% returns, which exhibits maximum yield strength of 516.65 MPa at room temperature and 62.17 MPa at 1,150 °C.

关键词： superalloy returns proportion composition microstructure mechanical properties

Effects of Neutron Skin Thickness in Peripheral Nuclear Reactions

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Chinese Physics Letters 2011年第10期28卷 66-69页

作者： FANG De-Qing MA Yu-Gang CAI Xiang-Zhou tian wen-dong WANG Hong-Wei Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800

Effects of neutron skin thickness in peripheral nuclear collisions are investigated using the statistical abrasion ablation (SAA) model. The reaction cross section, neutron (proton) removal cross section, one-neutron (proton) removal cross section as well as their ratios for nuclei with different neutron skin thickness are studied. It is demonstrated that there are good linear correlations between these observables and the neutron skin thickness for neutron-rich nuclei. The ratio between the (one-)neutron and proton removal cross section is found to be the most sensitive observable of neutron skin thickness. Analysis shows that the relative increase of this ratio could be used to determine the neutron skin size in neutron-rich nuclei.

关键词： observable section Skin

The influence of Multi-Step Sequential Decay on Isoscaling and Fragment Isospin Distribution in GEMINI Simulation

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Chinese Physics Letters 2011年第6期28卷 82-85页

作者： ZHOU Pei tian wen-dong MA Yu-Gang CAI Xiang-Zhou FANG De-Qing WANG Hong-Wei Shanghai Institute of Applied Physics Chinese Academy of SciencesPO Box 800-204Shanghai 201800 Graduate School of the Chinese Academy of Sciences Beijing 100049

Extensive calculations on isoscaling behavior with the sequential-decay model GEMINI are performed for the mediate-heavy nuclei in the mass range A=110 and at excitation energies of up to 3 MeV per *** can still be observed after entire−step decays are considered for the light products as in the only first-step decay process *** between the products after the first-step decay and the ones after entire-step decay demonstrates that multi-step secondary sequential decay strongly influences the isoscaling parametersα,βas well as the fragment isospin *** entire−step decays,the isoscaling parametersαandβare decreased and the fragment isospin distribution can better reproduce the isospin distribution shape as the experimental data.

关键词： scaling decay excitation

Analysis of energy autocorrelation functions in dissipative heavy ion collision of ^(27)Al+^(27)Al

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Nuclear Science and Techniques 2001年第1期12卷 9-15页

作者： WANG Qi LI Song-Lin tian wen-dong LU Jun HU Peng-Yun LUO Yi-Xiao (Institute of Modern Physics, foe Chinese Academy of Sciences, 730000 Lanzhou ) 中科院近代物理所甘肃兰州 730000

The excitation functions were measured in the reaction of 27Al+27Al at incident energies from 114MeV to 127MeV in steps of 200keV. The detection angles were continuously covered from 10o to 57° in the laboratory system. The energy autocorrelation functions of the dissipative fragments were analyzed by using different approaches. The nonself-averaging oscillations in the excitation functions were considered due to the angular momentum coherence and damping of the coherent nuclear rotation. The damping results from a quantum chaotic motion.

关键词：重离子 ^27Al+^27Al碰撞自相关函数分析

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煤直接制氢实验研究

中国电机工程学报 2007年第32期27卷 40-45页

作者：王峰田文栋肖云汉中国科学院研究生院北京市海淀区100080 中国科学院工程热物理研究所北京市海淀区100080

构建了煤直接制氢定压实验系统,实现了高压系统内固体反应物料和水蒸气的连续供给和富氢气体产物的连续生产。以忻州烟煤为原料,在压力为3MPa和钙碳摩尔比为1.0的条件下对不同的温度等级(600、650、700和800℃)以及在3MPa压力和650℃温... 详细信息

构建了煤直接制氢定压实验系统,实现了高压系统内固体反应物料和水蒸气的连续供给和富氢气体产物的连续生产。以忻州烟煤为原料,在压力为3MPa和钙碳摩尔比为1.0的条件下对不同的温度等级(600、650、700和800℃)以及在3MPa压力和650℃温度条件下对不同钙碳摩尔比(0.6、1.0和1.5)进行了实验研究。实验结果表明实验压力下650℃以上的反应温度和1.0的钙碳摩尔比具有很好的制氢效果。典型工况下气态产物中氢占77.2%,甲烷占19.0%,二氧化碳及一氧化碳含量很少,均在1%左右。

关键词：煤连续实验装置 CO2吸收直接制氢

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污染密集型产业对华转移的区位决定因素分析

国际贸易问题 2006年第8期 120-124页

作者：田东文焦旸北京航空航天大学经济管理学院

发生于我国的跨境污染已从早期的洋垃圾进口,发展到输入污染技术设备乃至整个产业,致使其造成的环境损害愈发难于治理。本文运用条件LOGIT模型及我国的FDI数据,对影响污染密集型产业FDI区位选择的因素进行了评价。研究发现:政府环境管... 详细信息

发生于我国的跨境污染已从早期的洋垃圾进口,发展到输入污染技术设备乃至整个产业,致使其造成的环境损害愈发难于治理。本文运用条件LOGIT模型及我国的FDI数据,对影响污染密集型产业FDI区位选择的因素进行了评价。研究发现:政府环境管制、产业聚集效应、企业所有制结构及地区特征等因素,均不同程度地作用于污染密集型产业对华转移的区位选择倾向,且在诸多因素中,政府环境管制具有很明显的抑制作用。结论表明:有必要根据中国经济社会持续发展的质量要求,配合产业政策调整制定有效的环境政策,严格控制污染密集型产业对华转移。

关键词：污染密集型产业区位选择环境管制条件LOGIT模型

汇率变化对出口增长的微观作用机制——以中国制造业出口为例

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国际商务（对外经济贸易大学学报） 2015年第1期 14-26页

作者：田东文田丽婕胡娜北京航空航天大学经济管理学院北京100191

基于Hummel和Klenow（2005）分解方法,利用2000~2010年间中国制造业对43个经济体的出口贸易数据,采用核密度作图揭示了若干典型事实：广延边际和价格边际对中国制造业的出口增长产生显著影响,且作用逐渐增加,集约边际和数量边际的影响... 详细信息

基于Hummel和Klenow（2005）分解方法,利用2000~2010年间中国制造业对43个经济体的出口贸易数据,采用核密度作图揭示了若干典型事实：广延边际和价格边际对中国制造业的出口增长产生显著影响,且作用逐渐增加,集约边际和数量边际的影响十分有限。引入汇率因素扩展了一个企业异质性贸易模型,厘清了汇率及其他相关因素对出口增长模式的影响机制。理论分析认为,汇率下降即出口国货币升值将对集约边际产生负效应,而对广延边际的影响无法确定。基于理论框架并考虑汇率及其滞后因素和波动性,考察了不同贸易成本对各贸易边际的影响路径。实证结果表明：汇率主要作用于集约边际,汇率滞后项则显著影响广延边际;汇率波动性显示出某种相反作用：一方面抑制集约边际,另一方面却促进广延边际。进一步探索汇率对中国不同贸易方式的影响发现,人民币升值促使加工贸易出口份额上升而其他贸易方式出口份额下降。这些结论的政策内涵将有助于调整中国出口贸易结构,化解人民币升值可能带来的风险。

关键词：贸易边际企业异质性人民币汇率出口增长模式

Cold rotation in the reaction 19F+51V

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Nuclear Science and Techniques 1997年第2期

作者： Wang Qi, Lu Jun, Xu Hu Shan, Li Song Lin, Zhu Yong Tai, Zhang Yu Hu,tian wen dong ( Institute of Modern Physics, the Chinese Academy ofSciences, Lanzhou 730000)

Ｃｏｌｄｒｏｔａｔｉｏｎｉｎｔｈｅｒｅａｃｔｉｏｎ１９Ｆ＋５１ＶＴｈｅＰｒｏｊｅｃｔＳｕｐｐｏｒｔｅｄｂｙＮａｔｉｏｎａｌＮａｔｕｒａｌＳｃｉｅｎｃｅＦｏｕｎｄａｔｉｏｎｏｆＣｈｉｎａ，ｔｈｅＮａｔｕｒａｌＳｃｉ... 详细信息

Ｃｏｌｄｒｏｔａｔｉｏｎｉｎｔｈｅｒｅａｃｔｉｏｎ１９Ｆ＋５１ＶＴｈｅＰｒｏｊｅｃｔＳｕｐｐｏｒｔｅｄｂｙＮａｔｉｏｎａｌＮａｔｕｒａｌＳｃｉｅｎｃｅＦｏｕｎｄａｔｉｏｎｏｆＣｈｉｎａ，ｔｈｅＮａｔｕｒａｌＳｃｉｅｎｃｅＦｏｕｎｄａｔｉｏｎｏｆＧ...

关键词： Nuclear temperature Dissipative reactions Excitation functions Rotation levels