检索结果-内蒙古大学图书馆

Macroporous Ni foam-supported Co_3O_4 nanobrush and nanomace hybrid arrays for high-efficiency CO oxidation

Journal of Environmental Sciences 2019年第1期31卷 136-144页

作者： Shengpeng Mo Hui He Quanming Ren Shuangde Li Weixia Zhang Mingli Fu Limin Chen Junliang Wu Yunfa Chen Daiqi Ye School of Environment and Energy South China University of Technology State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT) Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal South China University of Technology Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences

Herein, we reported the synthesis of well-defined Co_3O_4 nanoarrays(NAs) supported on a monolithic three-dimensional macroporous nickel(Ni) foam substrate for use in highefficiency CO oxidation. The monolithic Co_3O_4 NAs catalysts were obtained through a generic hydrothermal synthesis route with subsequent calcination. By controlling the reaction time,solvent polarity and deposition agent, these Co_3O_4 NAs catalysts exhibited various novel morphologies(single or hybrid arrays), whose physicochemical properties were further characterized by using several analytical techniques. Based on the catalytic and characterization analyses, it was found that the Co_3O_4 NAs-6 catalyst with nanobrush and nanomace arrays displayed enhanced catalytic activity for CO oxidation, achieving an efficient 100% CO oxidation conversion at a gas hourly space velocity(GHSV) 10,000 hr^(-1) and 150°C with longterm stability. Compared with the other Co_3O_4 NAs catalysts, it had the highest abundance of surface-adsorbed oxygen species, excellent low-temperature reducibility and was rich in surface-active sites(Co^(3+)/Co^(2+)= 1.26).

关键词： CO oxidation Nanomace Co3O4 Hybrid arrays Macroporous Ni foam

来源：评论

学校读者我要写书评

暂无评论

Vehicle Platoon control with Virtual Path Constraints

Vehicle Platoon Control with Virtual Path Constraints

引用

control Technology and Applications (CCTA),

作者： Jianwei Sun Rajan Gill Mechanical and Process Engineering Department Institute for Dynamic Systems and Control (IDSC) Zürich Switzerland

This paper studies distributed platoon control with virtual path constraints. Using transverse feedback linearization, the control approach decouples the platoon's dynamics into components tangential and transversal to the path. A platoon controller exclusively in the tangential subsystem controls the platoon's formation tangentially along the path, while a feedback control law in the transversal component stabilizes the platoon to remain on the path. As an application of the theory, a human-robot interaction experiment is performed on a platoon of quadrotors. The platoon leader implements an admittance controller, which allows the platoon to respond to human-applied forces. The path constraints limit the platoon's movement to only be along the path, ensuring safety to the interacting human.

关键词： Vehicle dynamics Feedback control Admittance Safety Manifolds Robot kinematics

来源：评论

学校读者我要写书评

暂无评论

Evacuation control of Crowds of Pedestrians: Distributed or Decentralized? ⁎

引用

IFAC-PapersOnLine 2020年第5期53卷 318-323页

作者： Kecai Cao YangQuan Chen Chenglin Liu Nanjing Institute of Technology Nanjing 211167 China Mechatronics Embedded Systems and Automation Lab School of Engineering University of California Merced CA USA 95343 Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi 214122 China

Evacuation of crowds in a corridor with only one exit has been considered in this paper where distributed controllers have been constructed to regulate the crowd’s evacuation speed so that stampede tragedy can be avoided. Macroscopic model for crowds of pedestrians has been firstly derived based on inspiration of LWR (Lighthill-Whitham and Richards) model and Greenshields model from traffic system where finite volume method has been introduced to simplify the obtained PDEs into finite ODEs. Distributed evacuation controllers have been constructed based on inspiration of multi-agent system and stability analysis of obtained closed-loop system has been simplified to linear system with the delicate controllers proposed. Comparisons between distributed evacuation controllers and previous evacuation controllers have also been presented to show the advantages and disadvantages of different controllers under different initial density of crowds so that tragedy of crowd stampede can be effectively avoided with appropriate selection of different controllers.

关键词： Distributed evacuation controller Decentralized evacuation controller Stampede

来源：评论

学校读者我要写书评

暂无评论

A Mini-Review on Metal Recycling from Spent Lithium Ion Batteries

引用

engineering 2018年第3期4卷 361-370页

作者： Xiaohong Zheng Zewen Zhu Xiao Lin Yi Zhang Yi He Hongbin Cao Zhi Sun Beijing Engineering Research Center of Process Pollution Control Key Laboratory of Green Process and Engineering Division of Environment Technology and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Toixing High School of Jiangsu Province Toixing 225400 China Solid Waste and Chemicals Management Center Ministry of Ecology and Environment of the People's Republic of China Beijing 100029 China

The rapid growth of lithium ion batteries （LIBs） for portable electronic devices and electric vehicles has resulted in an increased number of spent LIBs. Spent LIBs contain not only dangerous heavy metals but also toxic chemicals that pose a serious threat to ecosystems and human health. Therefore, a great deal of attention has been paid to the development of an efficient process to recycle spent LIBs for both economic aspects and environmental protection. In this paper, we review the state-of-the-art processes for metal recycling from spent LIBs, introduce the structure of a LIB, and summarize all available technologies that are used in different recovery processes. It is notable that metal extraction and pretreatment play impor- tant roles in the whole recovery process, based on one or more of the principles of pyrometallurgy, hydrometallurgy, biometallurgy, and so forth. By further comparing different recycling methods, existing challenges are identified and suggestions for improving the recycling effectiveness can be proposed.

关键词： Spent lithium ion batteries Valuable metals Pretreatment Metal extraction Product preparation Recycling

来源：评论

学校读者我要写书评

暂无评论

A Primal-Dual SGD Algorithm for Distributed Nonconvex Optimization

arXiv

引用

arXiv 2020年

作者： Yi, Xinlei Zhang, Shengjun Yang, Tao Chai, Tianyou Johansson, Karl H. The Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm100 44 Sweden The Department of Electrical Engineering University of North Texas DentonTX76203 United States The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China

The distributed nonconvex optimization problem of minimizing a global cost function formed by a sum of n local cost functions by using local information exchange is considered. This problem is an important component of many machine learning techniques with data parallelism, such as deep learning and federated learning. We propose a distributed primal–dual stochastic gradient descent (SGD) algorithm, suitable for arbitrarily connected communication networks and any smooth (possibly nonconvex) cost functions. We show that the proposed algorithm achieves the linear speedup convergence rate O(1/√nT) for general nonconvex cost functions and the linear speedup convergence rate O(1/(nT)) when the global cost function satisfies the Polyak–Lojasiewicz (P–L) condition, where T is the total number of iterations. We also show that the output of the proposed algorithm with constant parameters linearly converges to a neighborhood of a global optimum. We demonstrate through numerical experiments the efficiency of our algorithm in comparison with the baseline centralized SGD and recently proposed distributed SGD algorithms. Copyright © 2020, The Authors. All rights reserved.

关键词： Cost functions

来源：评论

学校读者我要写书评

暂无评论

An inverse machine learning application for mixture product design

An inverse machine learning application for mixture product ...

引用

2019 AIChE Annual Meeting

作者： Mao, Haitao Lu, Wang Zhang, Lei Tula, Anjan K. Gani, Rafiqul Institute of Chemical Process Systems Engineering School of Chemical Engineering Dalian University of Technology Dalian116024 China College of Control Science and Engineering Zhejiang University Hangzhou China PSE for SPEED Skyttemosen 6 AllerodDK-3450 Denmark PSE for SPEED Bangkok Thailand

来源：评论

学校读者我要写书评

暂无评论

The Role of Surface Termination in Halide Perovskites for Efficient Photocatalytic Synthesis

引用

Angewandte Chemie 2020年第31期132卷 13031-13037页

作者： Dong Y. Li K. Luo W. Zhu C. Guan H. Wang H. Wang L. Deng K. Zhou H. Xie H. Bai Y. Li Y. Chen Q. Experimental Center of Advanced Materials Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China School of Chemistry and Chemical Engineering Southwest Petroleum University Chengdu 610500 China Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology Chinese Academy of Agricultural Sciences Beijing 100193 China Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China School of Physics and Electronics Central South University Changsha Hunan 410083 China

Halide perovskites have received attention in the field of photocatalysis owing to their excellent optoelectronic properties. However, the semiconductor properties of halide perovskite surfaces and the influence on photocatalytic performance have not been systematically clarified. Now, the conversion of triose (such as 1,3-dihydroxyacetone (DHA)) is employed as a model reaction to explore the surface termination of MAPbI3. By rational design of the surface termination for MAPbI3, the production rate of butyl lactate is substantially improved to 7719 μg g−1 cat. h−1 under visible-light illumination. The MAI-terminated MAPbI3 surface governs the photocatalytic performance. Specially, MAI-terminated surface is susceptible to iodide oxidation, which thus promotes the exposure of PbII as active sites for this photocatalysis process. Moreover, MAI-termination induces a p-doping effect near the surface for MAPbI3, which facilitates carrier transport and thus photosynthesis. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： halide perovskite iodide vacancies photocatalysis surface termination triose

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to “Mathematical modeling approach for the green synthesis of high-performance nanoporous zeolites Na-X optimized for water vapor sorption” [Mater. Today Commun. 37 (2023), 107406]

引用

Materials Today Communications 2024年 38卷

作者： Kora Lucresse Tiomo Nguena Cyrille Ghislain Fotsop Serges Bruno Lemoupi Ngomade Arnaud Kamdem Tamo Chinyere Ada Madu Fabian I. Ezema Emeka Emmanuel Oguziea Department of Chemistry Research Unit of Noxious Chemistry and Environmental Engineering Faculty of Science University of Dschang Dschang Cameroon Africa Center of Excellence in Future and Electrochemical Systems Federal University of Technology Owerri Nigeria Institute of Chemistry Faculty of Process and Systems Engineering Universitat ¨ Platz 2 39106 Magdeburg Germany Biofuel Division CSIR-Indian Institute of Petroleum Dehradun 248005 India Laboratory for Bioinspired Materials BMBT Intitute of Microsystems Engineering-IMTEK University of Freiburg 79110 Freiburg Germany Departement of Physics and Astronomy University of Nigeria Nsukka Nigeria

来源：评论

学校读者我要写书评

暂无评论

Precision Fermentation as a Route to Modify Β-Lactoglobulin Structure Through Substitution of Specific Cysteine Residues

SSRN

引用

SSRN 2023年

作者： Brune, Sarah E. Hoppenreijs, Loes J.G. Kühl, Toni Lautenbach, Vanessa Walter, Johannes Peukert, Wolfgang Schwarz, Karin Imhof, Diana Boom, Remko M. Krull, Rainer Keppler, Julia K. Biedendieck, Rebekka Technische Universität Braunschweig Institute of Biochemical Engineering Rebenring 56 Braunschweig38106 Germany Technische Universität Braunschweig Institute of Microbiology Rebenring 56 Braunschweig38106 Germany Rebenring 56 Braunschweig38106 Germany Franz-Liszt-Straße 35a Braunschweig38106 Germany Wageningen University Laboratory of Food Process Engineering P.O. Box 17 Wageningen6700 AA Netherlands University of Bonn Pharmaceutical institute Pharmaceutical Biochemistry and Bioanalytics An der Immenburg 4 Bonn53121 Germany Friedrich-Alexander-Universität Erlangen-Nürnberg Institute of Particle Technology Interdisciplinary Center for Functional Particle Systems Haberstraße 9a Erlangen91058 Germany Kiel University Division of Food Technology Heinrich-Hecht Platz 10 Kiel24118 Germany

Precision fermentation is a promising route to develop recombinant proteins with improved functionality. Protein functionality is highly influenced by protein structure, which can be significantly affected by conformational restraints induced by cysteines. Here, we study the impact of individual cysteines on β-lactoglobulin structure, by stepwise substituting them with alanine. Structural characterization was performed from secondary to quaternary level. The findings demonstrated that the free Cys121 played no role in the folding and dimerization of BLG. The β-barrel usually includes one disulfide bond (Cys106-Cys119), which was found to be crucial for its formation. The usually exposed disulfide bond (Cys66-Cys160) played no major role in folding of the β-barrel, but mainly modulated its accessibility and mediated dimerization. Thereby, cysteine mutations can be used as a tool to modify protein structures. These different structures can now be used to further understand the impact on protein behaviour and their functionality. © 2023, The Authors. All rights reserved.

关键词： Dimerization

来源：评论

学校读者我要写书评

暂无评论

Simulation and Verification of Wing-In-Ground Aero-Olfactory Effect for the Gas-Sensitive Rotorcrafts

Simulation and Verification of Wing-In-Ground Aero-Olfactory...

引用

第三十八届中国控制会议

作者： Jia-Cheng Sun Tao Jing Qing-Hao Meng Institute of Robotics and Autonomous Systems Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information Engineering Tianjin University

This paper proposes a method to simulate odor diffusion process under the wing-in-ground aerodynamic olfactory effect for gas-sensitive rotorcrafts and verifies its correctness by experiments. When an aircraft is flying close to the ground,the flow characteristics will be affected by the ground, the induced drag and wake volocity will be changed, which is called the wing-in-ground effect. The diffusion of odor plume under the wing-in-ground effect is different from the normal *** this paper, the wing-in-ground effect is simulated by the opposite flow of two mirrored wakes. This method converts the influence of ground on wake vortexes into that of mirrored wake vortexes. Inspired by the PIV(particle image velocimetry)principle, a simple and easy-to-operate device that can be realized in the offices is designed and built to verify the accuracy of the simulation. The Hu invariant moments are used to compare the envelope lines of odor-plumes images in the simulation and experiment, and the results are converted into a number indicating the similarity between them. The comparison results show that the simulation model of the wing-in-ground aerodynamic olfactory effect is basically the same as the experimental one, that is to say, the proposed model is a reliable method to simulate the odor diffusion process under the wing-in-ground effect of rotorcrafts.

关键词： wing-in-ground effect aerodynamic olfactory effect gas-sensitive rotorcrafts odor diffusion plume simulation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：