检索结果-内蒙古大学图书馆

Unveiling Electrochemical Urea Synthesis by Co-Activation of CO2and N2with Mott–Schottky Heterostructure Catalysts

Angewandte Chemie 2021年第19期133卷

作者： Menglei Yuan Junwu Chen Yiling Bai Prof. Zhanjun Liu Jingxian Zhang Tongkun Zhao Qin Wang Shuwei Li Prof. Hongyan He Prof. Guangjin Zhang CAS Key Laboratory of Green Process Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Center of Materials Science and Optoeletronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 P. R. China Engineering Design Department Hebei Enco Petrochemical Engineering Co. Ltd. Henan Branch Henan 450000 P. R. China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China

Electrocatalytic C−N bond coupling to convert CO 2 and N 2 molecules into urea under ambient conditions is a promising alternative to harsh industrial processes. However, the adsorption and activation of inert gas molecules and then the driving of the C–N coupling reaction is energetically challenging. Herein, novel Mott–Schottky Bi-BiVO 4 heterostructures are described that realize a remarkable urea yield rate of 5.91 mmol h −1 g −1 and a Faradaic efficiency of 12.55 % at −0.4 V vs. RHE. Comprehensive analysis confirms the emerging space–charge region in the heterostructure interface not only facilitates the targeted adsorption and activation of CO 2 and N 2 molecules on the generated local nucleophilic and electrophilic regions, but also effectively suppresses CO poisoning and the formation of endothermic *NNH intermediates. This guarantees the desired exothermic coupling of *N=N* intermediates and generated CO to form the urea precursor, *NCON*.

关键词： C–N coupling electrocatalysis Mott–Schottky heterostructures urea

来源：评论

学校读者我要写书评

暂无评论

Theoretical and Experimental Study on Vibrations of Long-Span Bridge Cables Considering Non-Uniform Additional Tension

SSRN

引用

SSRN 2024年

作者： Zhang, Xin Zhou, Tao Alkayem, Nizar Cao, Maosen Wang, Qiang Peng, Jiayi Ostachowicz, Wieslaw Department of Measurement and Control Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing210003 China Department of Engineering Mechanics Hohai University 1 Xikang Road Nanjing210098 China Changjiang River Scientific Research Institute Yangtze River Water Resources Commission 23 Huangpu Road Wuhan430010 China The State Key Laboratory for the Safety Long-life Health Operation and Maintenance of Long-span Bridges Jiangsu Transportation Research Institute 2200 Chengxin Road Nanjing210098 China Institute of Fluid-Flow Machinery Polish Academy of Sciences 14 ul. Fiszera Gdansk80-952 Poland

Long-span cables become more flexible and may lead to severe vibration responses, which jeopardizing the structural safety of bridge engineering. Currently, the experimental investigation of long span cables is relatively rare, lacking the of analytical methods that can describe their dynamic features. To address this issue, this paper conducts a theoretical and experimental study on vibrations of long-span bridge cables. A vibration model is proposed to show the influence of non-uniform additional tension. The dynamic control equation is further derived and simplified through non-dimensional process. Besides, parameters studies are made to evaluate the effect of non-dimensional parameters (i.e. material and geometrical parameters) on modal parameters (i.e. frequency and modal shape). Finally, a field experiment is implemented in a long-span bridge to collect the in-plane and out-plane vibration. The dynamic features of long-span cables are analyzed and compared with the theoretical results. In particular, the vibration characteristics and energy distribution pattern of in-plane and out-plane vibration are discussed. It is found that the proposed model can describe the in-plane and out-plane vibrations of long-span cables. © 2024, The Authors. All rights reserved.

关键词： Geometry

来源：评论

学校读者我要写书评

暂无评论

Multi-scale reconstruction of porous media from low-resolution core images using conditional generative adversarial networks

引用

Journal of Natural Gas Science and engineering 2022年 99卷

作者： Yongfei Yang Fugui Liu Jun Yao Stefan Iglauer Mozhdeh Sajjadi Kai Zhang Hai Sun Lei Zhang Junjie Zhong Vadim Lisitsa Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)) Ministry of Education Qingdao 266580 PR China Research Center of Multiphase Flow in Porous Media School of Petroleum Engineering China University of Petroleum (East China) Qingdao 266580 PR China Petroleum Engineering Department Edith Cowan University Joondalup Western Australia 6027 Australia Institute of Petroleum Engineering College of Engineering University of Tehran Tehran *** Iran Institute of Mathematics SB RAS Novosibirsk 630090 Russia

Various rocks such as carbonate, coal or shale contain both micro- and macro-pores. To accurately predict the fluid flow and mechanical properties of these porous media, a multi-scale characterization of the pore space is of key importance. Hybrid superposition methods perform well in such multi-scale reconstructions, however, input images with two resolutions (high and low) and different reconstruction methods are required. In addition, the superposition algorithms are complex and human factors can introduce serious bias. Here we thus propose an effective approach based on conditional generative adversarial network (cGAN) for efficient and reliable multi-scale digital rock reconstruction based only on low-resolution core images. High-resolution core images with narrow field of view (FOV) and their corresponding large structure images were thus used to train the cGAN model. The model was validated with real sample images, and the model-generated images exhibited great agreement with the real pore structures. We also demonstrate that the proposed method can generate images independent of the structure size to some extent. This work provides an advanced image-generating model based on deep learning, and therefore aids in better and wider pore-scale characterization and process modeling, to improve understanding of subsurface science and engineering processes.

关键词： Multi-scale Digital rock Generative adversarial network Porous media reconstruction Deep learning

来源：评论

学校读者我要写书评

暂无评论

Water-Soluble Carbon Monoxide-Releasing Molecules (CORMs)

引用

Topics in current chemistry (Cham) 2022年第1期381卷 3页

作者： Huma Khan Muhammad Faizan Salamat Ullah Khan Niazi Niaz Muhammad Weiqiang Zhang Key Laboratory of Applied Surface and Colloid Chemistry MOE School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China. Key Laboratory of Applied Surface and Colloid Chemistry MOE School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China. faizanattari@***. Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China. faizanattari@***. University of Chinese Academy of Sciences Beijing 100049 China. faizanattari@***. School of Electronic Science and Information Technology Xian Jiaotong University Xi'an 710049 China. School of Biochemistry Minhaj University Lahore Lahore 54000 Pakistan. niazpk@***. Key Laboratory of Applied Surface and Colloid Chemistry MOE School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 China. zwq@***.

Carbon monoxide-releasing molecules (CORMs) are promising candidates for producing carbon monoxide in the mammalian body for therapeutic purposes. At higher concentrations, CO has a harmful effect on the mammalian organism. However, lower doses at a controlled rate can provide cellular signaling for mandatory pharmacokinetic and pathological activities. To date, exploring the therapeutic implications of CO dose as a prodrug has attracted much attention due to its therapeutic significance. There are two different methods of CO insertion, i.e., indirect and direct exogenous insertion. Indirect exogenous insertion of CO suggests an advantage of reduced toxicity over direct exogenous insertion. For indirect exogenous insertion, researchers are facing the issue of tissue selectivity. To solve this issue, developers have considered the newly produced CORMs. Herein, metal carbonyl complexes (MCCs) are covalently linked with CO molecules to produce different CORMs such as CORM-1, CORM-2, and CORM-3, etc. All these CORMs required exogenous CO insertion to achieve the therapeutic targets at the optimized rate under peculiar conditions or/and triggering. Meanwhile, the metal residue was generated from i-CORMs, which can propagate toxicity. Herein, we explain CO administration, water-soluble CORMs, tissue accumulation, and cytotoxicity of depleted CORMs and the kinetic profile of CO release.

关键词： CO-releasing molecules (CORMs) Carbon monoxide (CO) Cellular targets Cytotoxicity Organometallic complexes Water-soluble CORMs

来源：评论

学校读者我要写书评

暂无评论

乙醇-空气混合气预混层流燃烧研究

乙醇-空气混合气预混层流燃烧研究

引用

2012年中国特种发动机工程及应用学术年会

作者： Zhang Zhiyuan 张志远 Huang Zuohua 黄佐华 Han Shu 韩树 Ma Xiangping 马向平 Huang Jun 黄军 Department of Mechanical Engineering Academy of Armored Forces Engineering Beijing 100072 装甲兵工程学院机械工程系北京 100072 State Key Laboratory of Muhiphase Flow in Power Engineering Xi'an Jiaotong University Shanxi Xi 'a 西安交通大学动力工程多相流国家重点实验室陕西西安 710049

利用定容燃烧弹研究了不同初始压力、初始温度、气体稀释度和燃空当量比下乙醇-空气-稀释气预混层流燃烧特性.结果表明：对于给定初始压力和温度，乙醇-空气预混合气的质量燃烧率、燃烧压力和温度的最大值均出现在当量比1.1左右，而火... 详细信息

利用定容燃烧弹研究了不同初始压力、初始温度、气体稀释度和燃空当量比下乙醇-空气-稀释气预混层流燃烧特性.结果表明：对于给定初始压力和温度，乙醇-空气预混合气的质量燃烧率、燃烧压力和温度的最大值均出现在当量比1.1左右，而火焰发展期和燃烧期在此当量比下最短，火焰发展期、燃烧期和燃烧压力峰值随初始温度的增加而减小，最高燃烧温度随初始温度的增加而增加，燃烧压力峰值和最高燃烧温度随初始压力的增加而增加，火焰发展期和燃烧期随稀释度的增加而增加，而燃烧压力峰值和最高燃烧温度随稀释度的增加而降低.

关键词：燃烧系统燃料乙醇混合气体温度控制

来源：评论

学校读者我要写书评

暂无评论

Cover Picture: Phosphoric Acid: A key Role in Control of Structure and Properties of Vanadium Phosphorus Oxide Catalysts During Synthesis (04/2021)

引用

ChemistrySelect 2021年第4期6卷

作者： Ting Zhang Dr. Ruirui Zhang Yongkang Zhang Zhiqi Xie Yingwei Li Hui Wu Dr. Fei Dai Prof. Ruixia Liu Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering CAS 1North 2nd Street Zhongguancun Haidian District Beijing 100190 CN Sino-Danish College University of Chinese Academy of Sciences Yuquan Road Shijingshan District Beijing 100049 CN The authors T. Zhang and R. Zhang contributed equally to this article. School of Chemical Engineering University of Chinese Academy of Sciences Yuquan Road Shijingshan District Beijing 100049 CN

来源：评论

学校读者我要写书评

暂无评论

Effect of particle content on relative permeabilities in water flooding

引用

Journal of Petroleum Science and engineering 2021年 205卷

作者： Xiaocong Yu Yushu Wang Yongfei Yang Ke Wang Jun Yao Kai Zhang Hai Sun Lei Zhang Wenhui Song Vadim Lisitsa School of Petroleum Engineering Faculty of Earth Resources China University of Geosciences Wuhan 430074 PR China Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)) Ministry of Education Qingdao 266580 PR China Research Center of Multiphase Flow in Porous Media School of Petroleum Engineering China University of Petroleum (East China) Qingdao 266580 PR China Institute of Mathematics SB RAS Novosibirsk 630090 Russia

Water flooding is the most widely used method to enhance oil recovery. Simulating the influence of particle content on fluid flow in water flooding process can provide instructive significance for oilfield development. In this paper, a pore network model was established to simulate the transport process of particles in injected water and fallen particles from the reservoir. It was used to study the influence of particle blockage, deposition and migration on the clogged throats and changes of oil-water relative permeability curves. In the model, four parameters were set, fallen particle diameter, injected particle diameter, fallen particle number and injected particle number. Other parameters were fixed and only a variable was changed to explore the changeable rule of relative permeability curves. It can be generally noted that fallen particle changes have great influence on the relative permeability curves of oil phase and injected particle changes mainly affect the relative permeability curves of water phase. It is of great significance for oilfield development to study the influence of particle transportation on fluid seepage processes.

关键词： Water flooding Pore network model Relative permeability curves Particle transportation

来源：评论

学校读者我要写书评

暂无评论

Surface Atomic Architecture: engineering Surface Atomic Architecture of NiTe Nanocrystals Toward Efficient Electrochemical N2Fixation (Adv. Funct. Mater. 39/2020)

引用

Advanced Functional Materials 2020年第39期30卷

作者： Menglei Yuan Qiongguang Li Jingxian Zhang Jiawen Wu Tongkun Zhao Zhanjun Liu Le Zhou Hongyan He Bin Li Guangjin Zhang CAS Key Laboratory of Green Process Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Center of Materials Science and Optoeletronics Engineering University of Chinese Academy of Sciences Beijing 100049 China Beijing Engineering Research Center of Printed Electronics Beijing Institute of Graphic Communication Beijing 102600 China CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China Zhengzhou Tobacco Research Institute of CNTC No 2 Fengyang Street Zhengzhou High‐Tech Development District Zhengzhou 450001 China

来源：评论

学校读者我要写书评

暂无评论

Applications of Raman Spectroscopy in Clinical Medicine

arXiv

引用

arXiv 2023年

作者： Qi, Yaping Chen, Esther Xinyi Hu, Dan Yang, Ying Wu, Zhenping Zheng, Ming Sadi, Mohammad A. Jiang, Yucheng Zhang, Kang Chen, Zi Chen, Yong P. Department of Engineering Science Faculty of Innovation Engineering Macau University of Science and Technology Av. Wai Long China Tohoku University Sendai980-8577 Japan Faculty of Medicine Macau University of Science and Technology Av. Wai Long China State Key Laboratory of Information Photonics and Optical Communications School of Science Beijing University of Posts and Telecommunications Beijing100876 China School of Materials Science and Physics China University of Mining and Technology Xuzhou221116 China Department of Physics and Astronomy Elmore Family School of Electrical and Computer Engineering Birck Nanotechnology Center Purdue Quantum Science and Engineering Institute Purdue University West LafayetteIN47907 United States Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and Technology Suzhou University of Science and Technology Jiangsu Suzhou215009 China Division of Thoracic Surgery Brigham and Women's Hospital Harvard Medical School 75 Francis Street BostonMA02115 United States Institute of Physics and Astronomy Villum Center for Hybrid Quantum Materials and Devices Aarhus University AarhusC 8000 Denmark

Raman spectroscopy provides spectral information related to the specific molecular structures of substances and has been well established as a powerful tool for studying biological tissues and diagnosing diseases. This article reviews recent advances in Raman spectroscopy and its applications in diagnosing various critical diseases, including cancers, infections, and neurodegenerative diseases, and in predicting surgical outcomes. These advances are explored through discussion of state-of-the-art forms of Raman spectroscopy, such as surface-enhanced Raman spectroscopy, resonance Raman spectroscopy, and tip-enhanced Raman spectroscopy employed in biomedical sciences. We discuss biomedical applications, including various aspects and methods of ex vivo and in vivo medical diagnosis, sample collection, data processing, and achievements in realizing the correlation between Raman spectra and biochemical information in certain diseases. Finally, we present the limitations of the current study and provide perspectives for future research. © 2023, CC BY.

关键词： COVID-19

来源：评论

学校读者我要写书评

暂无评论

化学工程前沿专题主编寄语

引用

engineering 2021年第1期7卷 5-8页

作者：祝京旭王军武 Particle Technology Research Centre University of Western Ontario State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences

2019年8月2-5日,由全球华人化工学者学会(GACCE)主办、四川大学化工学院承办的第十一届全球华人化工学者研讨会(GCCES-11)在成都隆重举行。GCCES是汇聚全球化工领域专家学者的国际性学术会议,旨在共同探讨国际化学工程教育与科学研究前... 详细信息

2019年8月2-5日,由全球华人化工学者学会(GACCE)主办、四川大学化工学院承办的第十一届全球华人化工学者研讨会(GCCES-11)在成都隆重举行。GCCES是汇聚全球化工领域专家学者的国际性学术会议,旨在共同探讨国际化学工程教育与科学研究前沿问题、传播化工知识与技术、推动国际交流与合作、促进化学工程与技术领域的学术繁荣、开展学科间的交叉融合和产学研协同创新、推动青年化工学者的职业发展、提高华人化工学者的全球影响力。

关键词：化学工程

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：