检索结果-内蒙古大学图书馆

Complexity at Mesoscales:A Common Challenge in Developing Artificial Intelligence

engineering 2019年第5期5卷 924-929页

作者： Li Guo Jun Wu Jinghai Li State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China School of Computer and Information Technology Beijing Jiaotong UniversityBeijing 100044China

Exploring the physical mechanisms of complex systems and making effective use of them are the keys to dealing with the complexity of the *** emergence of big data and the enhancement of computing power,in conjunction with the improvement of optimization algorithms,are leading to the development of artificial intelligence(AI)driven by deep ***,deep learning fails to reveal the underlying logic and physical connotations of the problems being *** provides a concept to understand the mechanism of the spatiotemporal multiscale structure of complex systems,and its capability for analyzing complex problems has been validated in different *** paper proposes a research paradigm for AI,which introduces the analytical principles of mesoscience into the design of deep learning *** is done to address the fundamental problem of deep learning models detaching the physical prototype from the problem being solved;the purpose is to promote the sustainable development of AI.

关键词： Artificial intelligence Deep learning Mesoscience Mesoscale Complex system

来源：评论

学校读者我要写书评

暂无评论

Morphology-dependent catalytic properties of nano- cupric oxides in the Rochow reaction

引用

Nano Research 2018年第2期11卷 804-819页

作者： Yu Zhang Yongjun Ji Jing Li Hezhi Liu Xiao Hu Ziyi Zhong Fabing Su State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China Nanyang Environment & Water Research Institute (NEWRI) Nanyang Technological University Singapore Singapore

Four kinds of CuO catalysts with well-controlled leaf-like （L-CuO）, flower-like （F-CuO）, sea-urchin-like （U-CuO）, and oatmeal-like （O-CuO） morphologies were synthesized by a facile precipitation method assisted by various chelating ligands. High-resolution transmission electron microscopy and fast Fourier transform infrared spectroscopy indicated that the dominant crystal facets of L-CuO, F-CuO, U-CuO, and O-CuO were {001}, {110}, {001}, and {110}, as well as {001} and {110}, respectively. When tested for the Rochow reaction, it was found that their catalytic performances were dependent on their structures. Among the four CuO catalysts, L-CuO exhibited the best catalytic property, along with the strongest adsorption ability for oxygen and highest reducibility, which are mainly because of its largely exposed {001} facet and large specific surface area. In addition, the amount of the Cu3Si alloy phase, which is the most important reaction intermediate that generated in the reacted region of the Si surface, was measured for the different catalysts. Based on the findings, a detailed reaction mechanism was proposed. This work demonstrates that shape-controlled synthesis of oxide catalysts could be an effective strategy to design and develop efficient catalysts.

关键词： copper oxide shape-contxolled synthesis the Rochow reaction the Cu3Si alloy phase structure-propertyrelationship

来源：评论

学校读者我要写书评

暂无评论

Phosphine-Triggered Structural Defects in Au44Homologues Boost Electrocatalytic CO2Reduction

引用

Angewandte Chemie 2023年第33期135卷

作者： Dr. Shengli Zhuang Dr. Dong Chen Wai-Pan Ng Li-Juan Liu Meng-Ying Sun Dongyi Liu Tehseen Nawaz Qi Xia Xia Wu Dr. Yong-Liang Huang Prof. Dr. Seungkyu Lee Prof. Dr. Jun Yang Prof. Dr. Jian He Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China State Key Laboratory of Synthetic Chemistry The University of Hong Kong Pokfulam Road Hong Kong P. R. China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China Hong Kong Quantum AI Lab Limited Hong Kong P. R. China Department of Medicinal Chemistry Shantou University Medical College Shantou Guangdong 515041 P. R. China

The systematic induction of structural defects at the atomic level is crucial to metal nanocluster research because it endows cluster-based catalysts with highly reactive centers and allows for a comprehensive investigation of viable reaction pathways. Herein, by substituting neutral phosphine ligands for surface anionic thiolate ligands, we establish that one or two Au 3 triangular units can be successfully introduced into the double-stranded helical kernel of Au 44 (TBBT) 28 , where TBBT=4- tert -butylbenzenethiolate, resulting in the formation of two atomically precise defective Au 44 nanoclusters. Along with the regular face-centered-cubic (fcc) nanocluster, the first series of mixed-ligand cluster homologues is identified, with a unified formula of Au 44 (PPh 3 ) n (TBBT) 28−2 n ( n =0–2). The Au 44 (PPh 3 )(TBBT) 26 nanocluster having major structural defects at the bottom of the fcc lattice demonstrates superior electrocatalytic performance in the CO 2 reduction to CO. Density functional theory calculations indicate that the active site near the defects significantly lowers the free energy for the *COOH formation, the rate-determining step in the whole catalytic process.

关键词： Cluster Assembly Gold Nanoclusters Homologues Phosphine Ligands Structural Defects

来源：评论

学校读者我要写书评

暂无评论

Preparation and characterization of a novel hybrid chelating material for effective adsorption of Cu(Ⅱ)and Pb(Ⅱ)

引用

Journal of Environmental Sciences 2018年第5期30卷 224-236页

作者： Ya Liu Peng Qian Yang Yu Bo Yu Yongliang Wang Shufeng Ye Yunfa Chen State Key Laboratory of Multiphase Complex Systems institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Lakehead University Thunder BayON PTB 5E1Canada University of Chinese Academy of Sciences Beijing 100049China

The discharge of heavy metal ions such as Cu^2＋and Pb^2＋poses a severe threat to public health and the environment owing to their extreme toxicity and bioaccumulation through food chains Herein, we report a novel organic–inorganic hybrid adsorbent, Al（OH）3-poly（acrylamide dimethyldiallylammonium chloride）-graft-dithiocarbamate（APD）, for rapid and effectiv removal of Cu^2＋and Pb^2＋. In this adsorbent, the ＂star-like＂ structure of Al（OH）3 poly（acrylamide-dimethyldiallylammonium chloride） served as the support of dithiocarbamat（DTC） functional groups for easy access of heavy metal ions and assisted development of larg and compact floccules. The synthesized adsorbent was characterized by scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, Fourier transform infrared spectroscopy（FTIR）, and thermogravimetric analysis（TGA）. APD was demonstrated to hav rapid adsorption kinetics with an initial rate of 267.379 and 2569.373 mg/（g·min） as well a superior adsorption capacities of 317.777 and 586.699 mg/g for Cu2＋and Pb2＋respectively. Th adsorption process was spontaneous and endothermic, involving intraparticle diffusion and chemical interaction between heavy metal ions and the functional groups of APD. To assess it versatility and wide applicability, APD was also used in turbid heavy metal wastewater, and performed well in removing suspended particles and heavy metal ions simultaneously through flocculation and chelation. The rapid, convenient and effective adsorption of Cu^2＋and Pb^2＋give APD great potential for heavy metal decontamination in industrial applications.

关键词： Hybrid polymer Dithiocarbamate Heavy metal ions Adsorption

来源：评论

学校读者我要写书评

暂无评论

科学的时代特征——应对全球挑战中转变范式（英文）

引用

engineering 2022年第12期 22-23页

作者：董超李静海 Daya Reddy National Natural Science Foundation of China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences University of Cape Town

Whether the goal is to meet global challenges or to enable a paradigm shift, it is always essential for science to move beyond conventional thinking. Moreover, the mutually beneficial interactions between global challenges and paradigm shifts require a great deal of effort. To this end, it is imperative for the scientific

关键词：

来源：评论

学校读者我要写书评

暂无评论

Modeling of fixed bed reactor for coal tar hydrogenation via the kinetic lumping approach

引用

Carbon Resources Conversion 2018年第3期1卷 279-283页

作者： Fei Dai Yalin Zhang Endong Xia Zhanquan Zhang Zhihua Zhang Chunshan Li Research Institute of Petroleum and Petrochemicals SINOPECBeijing 100195PR China Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex SystemInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190PR China

Hydrogenation technology is an indispensable chemical upgrading process for converting the heavy feedstock into favorable lighter *** this work,a new kinetic model containing four hydrocarbon lumps(feedstock,diesel,gasoline,cracking gas)was developed to describe the coal tar hydrogenation process,the Levenberg–Marquardt’s optimization algorithm was used to determine the kinetic parameters by minimizing the sum of square errors between experimental and calculated data,the predictions from model validation showed a good agreement with experimental ***,an adiabatic reactor model based on proposed lumped kinetic model was constructed to further investigate the performance of hydrogenation fixed-bed units,the mass balance and energy balance within the phases in the reactor were taken into accounts in the form of ordinary differential *** application of the reactor model was performed for simulating the actual bench-scale plant of coal tar hydrogenation,the simulated results on the products yields and temperatures distribution along with the reactor are shown to be good consistent with the experimental data.

关键词： Coal tar Reactor model Lumped kinetics Hydrogenation

来源：评论

学校读者我要写书评

暂无评论

Correction: Efficient transformation of CO2 to cyclic carbonates using bifunctional protic ionic liquids under mild conditions

引用

Green Chemistry 2021年第22期23卷 9179-9179页

作者： Xianglei Meng Zhaoyang Ju Suojiang Zhang Xiaodong Liang Nicolas von Solms Xiaochun Zhang Xiangping Zhang Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 People's Republic of China Department of Chemical and Biochemical Engineering Center for Energy Resources Engineering (CERE) Technical University of Denmark Kgs. Lyngby Denmark School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China

Correction for ‘Efficient transformation of CO2 to cyclic carbonates using bifunctional protic ionic liquids under mild conditions’ by Xianglei Meng et al., Green Chem., 2019, 21, 3456–3463, DOI: 10.1039/C9GC01165J.

Correction for ‘Efficient transformation of CO₂ to cyclic carbonates using bifunctional protic ionic liquids under mild conditions’ by Xianglei Meng et al., Green Chem., 2019, 21, 3456–3463, DOI: 10.1039/C9GC01165J.

关键词：

来源：评论

学校读者我要写书评

暂无评论

flow behaviors of shale oil in kerogen slit by molecular dynamics simulation

引用

Chemical engineering Journal 2022年 434卷

作者： Jie Liu Yongfei Yang Shuyu Sun Jun Yao Jianlong Kou Physical Science and Engineering Division (PSE) Computational Transport Phenomena Laboratory King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia 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 Condensed Matter Physics Zhejiang Normal University Jinhua 321004 PR China

In the last decades, shale oil, mainly distributed in the nanopores of shale, has been considered as the representative of unconventional energy to alleviate the energy crisis. But the ideal pore models greatly overestimate the flowing capability of shale oil. To get more accurate and reasonable flow behavior, the multicomponent shale oil in the realistic kerogen channel is studied by using molecular dynamic simulation. Both density and velocity distributions that along and perpendicular to the flow direction are studied in kerogen channel, where the influence of branch chain of kerogen is also took into consideration. The heavy component tends to form the adsorbed layers on the kerogen wall, as a result of the extremely strong affinity between kerogen and hydrocarbons, and some asphaltene molecules in bulk phase form the cluster in middle of slit. On the flow direction, the velocity profile preforms the peristaltic behavior due to the effect of branch chain of kerogen, and the toluene and asphaltene components contribute it mostly. According to the heterogeneous characteristics of shale oil flow, we define the fictitious slip boundary, which corresponds to the boundary between bulk phase and adsorbed phase, to describe shale oil flow precisely. We also examine the effects of driving pressure gradient, temperature and pore size on the flow behaviors. The enhancements of driving force and temperature both facilitate shale oil flow, and the maximum velocity reaches the stable value within larger kerogen pores. The potential energy distribution and the interaction force contour verified the peristaltic flow behavior and the validity of fictitious slip boundary.

关键词： Shale oil Kerogen flow behavior Molecular simulation

来源：评论

学校读者我要写书评

暂无评论

Study on Seepage Characteristics and Complex Well Pattern in Low Permeability Reservoir

Study on Seepage Characteristics and Complex Well Pattern in...

引用

作者： Lv jin Chemical-Machinery Department Mechanical Engineering CollegeXi’an Shiyou University The State Key Laboratory of Multi-phase Flow Xi’an Jiaotong University

Experimental research on the joint development of horizontal and vertical wells is carried out in this *** well patterns（VIVP,HIVP,VIHP and HIHP）were used to compare the advantages and disadvantages of water-injection and oil-production in horizontal and vertical *** is concluded that HIHP well pattern can form linear drive,delay injection water breakthrough time,improve sweep efficiency and reservoir recovery rate;horizontal wells are more suitable as production wells.

关键词： Low permeability Horizontal well Recovery rate Complex well pattern

来源：评论

学校读者我要写书评

暂无评论

Size effect of Si particles on the electrochemical performances of Si/C composite anodes

引用

Chinese Physics B 2018年第8期27卷 598-604页

作者： Bonan Liu Hao Lu Geng Chu Fei Luo Jieyun Zheng Shimou Chen Hong Li Beijing National Laboratory for Condensed Matter Physics Institute ol PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Green Process Engineering State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 00190China Tianmu Energy Anode MateriM Ltd.Co. Changzhou 213300China

A series of Si/C composites were fabricated based on pitch and Si powders with particle sizes of 30, 100, 500, and 3000 nm. The size effects of the Si particles in the Si/C composites were investigated for lithium-ion battery anodes. The nanoscale Si and Si/C composites exhibited good capacity retentions. Scanning electron microscopy showed that exterior and interior cracks emerging owing to volume expansion as well as parasitic reactions with the electrolyte could well explain the performance failure.

关键词： silicon-carbon composite solid-electrolyte interphase size effect, anode, volume expansion

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：