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Adsorption of Benzene on the Potassium Exchanged Hbeta zeolites

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Chemical Research in Chinese Universities 1994年第2期10卷 120-125页

作者： SHen Jian-ping MA Jun SUN Tie and JIANG Da-zhen(Department of Chemistry, Jilin University, Changchun , 130023)min en-ze(Research Institute of Petroleum Processing, Beijing, 100083)

n situ iR studies of benzene adsorbed on different potassium-exchanged degrees of KHβ zeolites were carried out under different conditions. The bands of adsorbed benzene on KHβ zeolites in the range of 2050-1750 cm-1 were *** KHβ zeolite has basicity only when the ratio of K to AI of KHβ is up to88. 39%, its basicity is stronger and its acidity is weaker. The order of stability ofthe adsorbed benzene species on the samples is O>H>K>b.

关键词： Absorption Benzene. zeolite

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约束条件下的巡线机器人逆运动学求解

控制理论与应用 2006年第1期23卷 43-48页

作者：李恩梁自泽谭民中国科学院自动化研究所复杂系统与智能科学实验室北京100080

高压输电线路巡检机器人是一种多关节悬挂运动机构,要实现其运动控制就需要根据机器人的本身机构特点和悬挂系统的运动约束条件进行运动学分析.本文利用微分扭转法对巡线机器人的正向运动学进行了求解,并通过对机器人悬挂系统的力学分析... 详细信息

高压输电线路巡检机器人是一种多关节悬挂运动机构,要实现其运动控制就需要根据机器人的本身机构特点和悬挂系统的运动约束条件进行运动学分析.本文利用微分扭转法对巡线机器人的正向运动学进行了求解,并通过对机器人悬挂系统的力学分析,得到了机器人运动学的约束条件,并在这种约束条件下,采用了一种可用来进行实时控制的迭代循环坐标下降(CCD)算法,来进行机器人的逆运动学求解.这种迭代算法对于有运动约束系统的逆运动学求解具有较强的适用性,而且它具有较好的收敛性和有效性,适合于在线计算,便于巡线机器人的实时运动控制.

关键词：巡线机器人逆运动学求解约束条件悬挂系统 CCD算法

Reconstructed rheometer for direct monitoring of dewatering performance and torque in tailings thickening process

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International Journal of minerals,Metallurgy and Materials 2020年第11期27卷 1430-1437页

作者： Yong Wang Ai-xiang Wu Zhu-en Ruan Zhi-hui Wang zong-su Wei Gang-feng Yang Yi-ming Wang School of Civil and Resource engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of the ministry of Education of China for High-Efficient Mining and Safety of Metal mines University of Science and Technology BeijingBeijing 100083China Section for Biological and Chemical engineering Department of EngineeringAarhus UniversityHangøvej 2DK-8200Aarhus NDenmark

To further clarify the dewatering performance and torque evolution during the tailings thickening process,a self-made rake was connected to a rheometer to monitor the shear stress and *** dewatering performance of the total tailings was greatly improved to a solid mass fraction of 75.33%in 240 *** dewatering process could be divided into three stages:the rapid torque growth period,damping torque growth period,and constant torque thickening *** machine restart was found to have a significant effect on the rake torque;it could result in rake ***,the simultaneous evolution of the torque and solid mass fraction of thickened tailings was analyzed.A relationship between the torque and the solid mass fraction was established,which followed a power *** the experimental and theoretical results provide a reference for the deep cone thickener design and operation to enhance the dewatering performance.

关键词： tailings dewatering rake reconstructed rheometer torque monitoring

Electrical stress and acid orange 7 synergistically clear the blockage of electron flow in the methanogenesis of low-strength wastewater

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environmental Science and Ecotechnology 2024年第4期20卷 291-299页

作者： ze-Chong Guo min-Hua Cui Chun-Xue Yang Hong-Liang Dai Tong-Yi Yang Lin-Zhi Zhai Yong Chen Wen-zong Liu Ai-Jie Wang School of environmental and Chemical engineering Jiangsu University of Science and TechnologyZhenjiang212100China State Key Laboratory of Urban Water Resource and environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan UniversityWuxi214122China School of Civil and environmental engineering Harbin Institute of TechnologyShenzhen518055China School of Geography and Tourism Harbin UniversityHarbin150001China School of environmental Science and engineering Huazhong University of Science and TechnologyWuhan430074China

energy recovery from low-strength wastewater through anaerobic methanogenesis is constrained by limited substrate *** development of efficient methanogenic communities is critical but *** we develop a strategy to acclimate methanogenic communities using conductive carrier(CC),electrical stress(ES),and Acid Orange 7(AO7)in a modified *** synergistic integration of CC,ES,and AO7 precipitated a remarkable 72-fold surge in methane production rate compared to the *** increase was attributed to an altered methanogenic community function,independent of the continuous presence of AO7 and ***7 acted as an external electron acceptor,accelerating acetogenesis from fermentation intermediates,restructuring the bacterial community,and enriching electroactive bacteria(EAB).Meanwhile,CC and ES orchestrated the assembly of the archaeal community and promoted electrotrophic methanogens,enhancing acetotrophic methanogenesis electron flow via a mechanism distinct from direct electrochemical *** collective application of CC,ES,and AO7 effectively mitigated electron flow impediments in low-strength wastewater methanogenesis,achieving an additional 34%electron recovery from the *** study proposes a new method of amending anaerobic digestion systems with conductive materials to advance wastewater treatment,sustainability,and energy self-sufficiency.

关键词： Methanogenesis Conductive carrier Electrical stress Acid orange 7 Electron transfer

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三维副翼铰链力矩计算

航空学报 2007年第3期28卷 519-526页

作者：吴宗成朱自强丁宁陈泽民北京航空航天大学航空科学与工程学院北京100083

数值模拟了带副翼偏转构型的二维、三维亚、跨、超声速来流情况的绕流流场,采用有限体积方法和AUSM+迎风格式数值求解N-S方程,四步龙格-库塔时间推进,湍流模型为Baldwin-Lomax和Spalart-All-maras湍流模型。二维模拟压强分布与实验数据... 详细信息

数值模拟了带副翼偏转构型的二维、三维亚、跨、超声速来流情况的绕流流场,采用有限体积方法和AUSM+迎风格式数值求解N-S方程,四步龙格-库塔时间推进,湍流模型为Baldwin-Lomax和Spalart-All-maras湍流模型。二维模拟压强分布与实验数据以及CFD软件模拟结果吻合较好。采用交错对接网格,数值模拟了不同副翼偏角和缝隙、来流马赫数、迎角和雷诺数的三维构型流场。通过舵面铰链力矩与实验数据的对比分析表明了该数值方法模拟此类复杂流场的可靠性和舵面铰链力矩计算的有效性。发现并研究了亚声速来流时铰链力矩随迎角的反向变化趋势,初步分析了副翼的缝隙和雷诺数效应。

关键词：副翼铰链力矩 N-S方程

Influence of microstructural characteristics on corrosion behavior of Mg-5Sn-3In alloy in Hank’s solution

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Transactions of Nonferrous Metals Society of China 2021年第10期31卷 2999-3011页

作者： Xue-jian WANG zong-ning CHen Yu-bo ZHANG en-yu GUO Hui-jun KANG Pei HAN Tong-min WANG Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China ningbo Institute of Dalian University of Technology Ningbo 315000China Orthopaedic Department Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China

The microstructural observation,the mass loss test,potentiodynamic polarization measurements and corrosion morphology examinations were conducted to study the influence of microstructural characteristics on corrosion behavior of Mg–5Sn–3In alloys in Hank’s solution after *** results show that the corrosion rate of the as-cast alloy is similar to that of as-extruded alloy;however,the local corrosion susceptibility is greatly weakened in the as-extruded alloy,especially in the extrusion *** relatively uniform corrosion morphology of the as-extruded alloy is attributed to refined Mg_(2)Sn particles,uniform distribution of Mg_(2)Sn particles and favorable crystal ***,the cytotoxicity tests confirm that the Mg–5Sn–3In alloy exhibits cytotoxicity of Grade 0−1 for NIH3T3 cells,suggesting an acceptable cytotoxicity of this alloy in the vitro assay.

关键词： Mg–Sn alloy indium element microstructure corrosion behavior cytotoxicity

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固体杂多酸催化剂研究新进展

石油化工 2000年第1期29卷 49-55页

作者：温朗友闵恩泽石油化工科学研究院北京100083

杂多酸是由杂原子(如P、Si、Fe、Co等)和多原子(如Mo、W、V、Nb、Ta等)按一定的结构通过氧原子配位桥联组成的一类含氧多酸.作为一类新型的催化材料,杂多酸及其盐类化合物以其独特的酸性、'准液相'行为、多功能(酸、氧化、光电催化)等... 详细信息

杂多酸是由杂原子(如P、Si、Fe、Co等)和多原子(如Mo、W、V、Nb、Ta等)按一定的结构通过氧原子配位桥联组成的一类含氧多酸.作为一类新型的催化材料,杂多酸及其盐类化合物以其独特的酸性、'准液相'行为、多功能(酸、氧化、光电催化)等优点在催化研究领域中受到研究者们的广泛重视.对于杂多酸(盐)催化剂的研究已有大量的文献报道[1～12].本文从实际应用出发,仅对杂多酸(盐)作为固体酸催化剂的制备、催化性质、应用研究的最新进展进行评述.

关键词：固体催化剂杂多酸催化剂进展

Landslide displacement prediction based on the ICEEMDAN,Apen and the CNN-LSTM models

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Journal of Mountain Science 2023年第5期20卷 1220-1231页

作者： LI Li-min WANG Chao-yang Wen zong-zhou GAO Jian XIA Meng-fan College of Electronics and Information Xi’an Polytechnic UniversityXi’an 710600 China Shaanxi Yixin Network Technology Co. LtdXi’an 710065China

Landslide deformation is affected by its geological conditions and many environmental *** it has the characteristics of dynamic,nonlinear and unstable,which makes the prediction of landslide displacement *** view of the above problems,this paper proposes a dynamic prediction model of landslide displacement based on the improvement of complete ensemble empirical mode decomposition with adaptive noise(ICEEMDAN),approximate entropy(Apen)and convolution long short-term memory(CNN-LSTM)neural ***,ICEEMDAN and Ap en are used to decompose the cumulative displacements into trend,periodic and random ***,the least square quintic polynomial function is used to fit the displacement of trend term,and the CNN-LSTM is used to predict the displacement of periodic term and random ***,the displacement prediction results of trend term,periodic term and random term are superimposed to obtain the cumulative displacement prediction *** proposed model has been verified in Bazimen landslide in the Three Gorges Reservoir area of *** experimental results show that the model proposed in this paper can more effectively predict the displacement changes of *** compared with long short-term memory(LSTM)neural network,gated recurrent unit(GRU)network model and back propagation(BP)neural network,CNN-LSTM neural network had higher prediction accuracy in predicting the periodic displacement,with the mean absolute percentage error(MAPE)reduced by 3.621%,6.893% and 15.886% respectively,and the root mean square error(RMSE)reduced by 3.834 mm,3.945 mm and 7.422mm ***,this model not only has high prediction accuracy but also is more stable,which can provide a new insight for practical landslide prevention and control engineering.

关键词： Displacement prediction ICEenDAN Approximate entropy Long short-term memory Bazimen landslide

Nitrogen Desorption in Molten Stainless Steel During Immersion Argon Blowing

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Journal of Iron and Steel Research International 2010年第5期17卷 1-5页

作者： CHen Jian-bin CHen Qi-zhong HUANG zong-ze HU Ji-ye SUN Ya-qin PAN Jia-qi School of Materials Science and engineering Shanghai Institute of Technology Shanghai 200235 China Products and Technology Institute Research and Development Center Shanghai Baosteel Group Corporation Shanghai 201900 China

The behavior of nitrogen desorption reaction in molten stainless steel for AISI 304 and 316 during immersion argon blowing through an immersed alumina nozzle with 3 mm in I. D. has been investigated by sampling method. Some kinetic parameters such as reaction order, rate constant and apparent activation energy of nitrogen desorption reaction for AISI 304 and 316 have been obtained. Results show that nitrogen desorption reaction from molten stainless steel for AISI 304 and 316 is the second order reaction. The rate constant at 1550 ℃ and 1 580 ℃ for AISI 316 is 0. 08407%-1 · min^-1 and 0. 82370%-1 · min^-1 , respectively. The rate constant at 1550 ℃ for AISI 304 is 0. 416 6%-1 · min^-1. The apparent activation energy Ea of nitrogen desorption reaction for AISI 316 is 2 136.47 kJ/ mol. This huge value of apparent activation energy verifies that the nitrogen desorption reaction has a complex and multistep reaction mechanism. The rate of nitrogen desorption reaction from molten stainless steel is mixed controlled by the desorption reaction of diatomic molecule nitrogen or of monatomic nitrogen from molten metal at the gas-metal interface and the mass transfer of nitrogen in molten metal. The rate equation of process for nitrogen desorption has been deduced.

关键词： nitrogen desorption stainless steel immersion argon blowing sampling method kinetics