检索结果-南通市图书馆

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen Yu Han Jun Wang Shibo Xi Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis

A SOC Estimation Method for Li-Ion Batteries under High-Rate Pulse Conditions based on AO-BPNN Model

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Space(Science & Technology) 2023年第1期3卷 620-631页

作者： Zhicheng Fu Bingxiang Sun Jie Gong Minming Gong XinZe Zhao Shichang Ma National Energy active Distribution Network Technology research and development center College of Electrical EngineeringBeijing Jiaotong UniversityBeijingChina

The estimation of state of charge(SOC)in lithium-ion batteries is important for ensuring the safe and stable operation of battery *** high-rate pulse conditions,the characteristics of short discharge time,high frequency,large current,strong interference,and complex transient characteristics that make lithium-ion batteries exhibit marked nonlinear *** existing battery management system has difficulties in capturing the rising and falling edge data of the pulses due to limitations in the sampling *** short idle time makes it challenging to obtain accurate open-circuit voltage,and there are difficulties in identifying the model ***,using a combination of coulomb counting method,open-circuit voltage correction method,and Kalman filtering method to estimate SOC poses certain *** study applies backpropagation neural network(BPNN)combined with Aquila optimizer(AO)algorithm to estimate SOC under high-rate pulse conditions,and experimental verification is performed using special 3-Ah lithium iron phosphate *** compared the estimation accuracy of the AO-BPNN model for SOC with the BPNN,support vector machine,extreme learning machine,and Fuzzy neural network models and verified the superiority of ***,by utilizing data with larger acquisition intervals,we obtained accurate evaluation results and reduced the data *** effectiveness of the assessment of AO-BPNN was individually verified under different high-rate pulse conditions and different static times through pulse experiments conducted under 9 operating conditions,with the estimation error controlled within 5%.Finally,the robustness of the proposed model was validated using test data with different sampling intervals and random measurement errors.

关键词： battery BPNN SOC

Geomorphological evidence inconvenient for the antecedent rivers of the Arun and Tista across the Himalayan range

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第9期21卷 3001-3017页

作者： NAKATA Takashi KUMAHARA Yasuhiro NAIK Sambit Prasanajit SAKAI Harutaka Graduate School of Humanities and Social Sciences Hiroshima UniversityHigashi-Hiroshima 739-8522Japan active fault and Earthquake Hazard Mitigation research center Pukyong National UniversityBusan 48513South Korea Department of Petroleum Engineering and Earth Sciences University of Petroleum and Energy StudiesDehradun 248007India Graduate School of Science Kyoto UniversityKyoto 606-8502Japan

The Arun and Tista Rivers,which flow across the Himalayas,are commonly known as antecedent valleys that overcame the rapid uplift of the Higher Himalayan *** clarify whether the idea of antecedent rivers is acceptable,we investigated the geomorphology of the Himalayas between eastern Nepal and Bhutan *** southern part of Tibetan Plateau,extending across the Himalayas as tectonically un-deformed glaciated terrain named as'Tibetan Corridor,'does not suggest the regional uplift of the Higher *** 8,000-m class mountains of Everest,Makalu,and Kanchenjunga are isolated residual peaks on the glaciated terrain composed of mountain peaks of 4,000–6,000 m *** Tibetan glaciers commonly beheaded by Himalayan glaciers along the great watershed of the Himalayas suggest the expansion of Himalayan river drainage by *** the narrow upstream regions of the Arun and Tista Rivers with less precipitation behind the range,it is hard to collect enough water for the power of down-cutting their channels against the uplifting *** fission track ages of the Higher Himalayan Crystalline Nappe suggest that the Himalayas attained their present altitude by 11–10 Ma,and the Arun and Tista Rivers formed deep gorges across the Himalayas by headward erosion.

关键词： Himalaya Antecedent river Geomorphology AW3D30 DSM Glacier piracy

Growing seismicity in the Sichuan Basin and its association with industrial activities

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2020年第11期63卷 1633-1660页

作者： Xinglin LEI Jinrong SU Zhiwei WANG Geological Survey of Japan National Institute of Advanced Industrial Science and Technology(AIST)Higashi 1-1-1TsukubaIbaraki 305-8567JapanChengdu 610041China Earthquake Monitoring Centre Sichuan Earthquake Administration State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeiing 100029China

In the Sichuan Basin,seismic activity has been low historically,but in the past few decades,a series of moderate to strong earthquakes have *** since 2015,earthquake activity has seen an unprecedented continuous growth trend,and the magnitude of events is *** the M5.7 Xingwen earthquake on 18 Dec.2018,which was suggested to be induced by shale gas hydraulic fracturing,a swarm of earthquakes with a maximum magnitude up to M6.0 struck Changning and the surrounding *** arose about the possible involvement of industrial actions in these destructive *** fact,underground fluid injection in salt mine fields has been occurring in the Sichuan Basin for more than70 *** of wastewater in natural gas fields has also continued for about 40 *** 2008,injection for shale gas development in the southern Sichuan Basin has increased *** possible link between the increasing seismicity and increasing injection activity is an important *** surrounded by seismically active zones to the southwest and northwest,the Sichuan Basin is a rather stable region with a wide range of geological ***,we present a brief review of earthquakes of magnitude 5 or higher since 1600 to obtain the long-term event rate and explore the possible link between the rapidly increasing trend of seismic activity and industrial injection activities in recent ***,based on a review of previous research results,combined with the latest data,we describe a comprehensive analysis of the characteristics and occurrence conditions of natural and injection-induced major seismic clusters in the Sichuan Basin since ***,we list some conclusions and insights,which provide a better understanding of why damaging events occur so that they can either be avoided or mitigated,point out scientific questions that need urgent research,and propose a general framework based on geomechanics for assessment and management of e

关键词： Induced seismicity Fluid injection Sichuan Basin Shale gas Wastewater disposal Salt mine

同方期刊数据库

Deserpentinization and high-pressure(eclogite-facies) metamorphic features in the Eoarchean ultramafic body from Isua,Greenland

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2022年第1期13卷 297-309页

作者： Juan Miguel Guotana Tomoaki Morishita Ikuya Nishio Akihiro Tamura Tomoyuki Mizukami Kenichiro Tani Yumiko Harigane Kristoffer Szilas D.Graham Pearson Graduate School of Natural Science&Technology Kanazawa UniversityJapan School of Environmental Science and Management University of the Philippines Los BañosLagunaPhilippines Lamont-Doherty Earth Observatory Columbia UniversityPalisadesNY 10964USA Volcanoes and Earth’s Interior research center Japan Agency for Marine-Earth Science and Technology2-15 NatsushimaKanagawa 237-0061Japan National Museum of Nature and Science 4-1-1AmakuboTsukuba-shiIbaraki 305-0005Japan Institute of Geology and Geoinformation Geological Survey of Japan/aist Central 71-1-1 HigashiTsukubaIbaraki 305-8567Japan Department of Geosciences and Natural Resource Management University of CopenhagenØster Voldgade 101350 CopenhagenDenmark Department of Earth&Atmospheric Sciences University of AlbertaEdmontonABCanada

Discontinuous chains of ultramafic rock bodies form part of the 3800–3700 Ma Isua Supracrustal Belt(ISB),hosted in the Itsaq Gneiss Complex of southwestern *** bodies are among the world’s oldest outcrops of ultramafic rocks and hence an invaluable geologic *** rocks from Lens B in the northwestern limb of ISB show characteristics of several stages of serpentinization and deserpentinization forming prograde and retrograde mineral ***-rich humite-group minerals such as titanian chondrodite(Ti-Chn)and titanian clinohumite(Ti-Chu)often occur as accessory phases in the metamorphosed ultramafic *** Ti-rich humite minerals are associated with metamorphic *** host olivine is highly forsteritic(Fo96-98)with variable Mn O and Ni O *** concentrations of the rare-earth elements(REE)and high-field strength elements(HFSE)of the metamorphic olivine are higher than typical mantle *** textural and chemical characteristics of the olivine indicate metamorphic origin as a result of deserpentinization of a serpentinized ultramafic protolith rather than primary assemblage reflecting mantle residues from high-degrees of partial *** close association of olivine,antigorite and intergrown Ti-Chn and Ti-Chu suggests pressure condition between$1.3–2.6 GPa within the antigorite stability field(<700°C).The overall petrological and geochemical features of Lens B ultramafic body within the Eoarchean ISB indicate that these are allochthonous ultramafic rocks that recorded serpentine dehydration at relatively lower temperature and reached eclogite facies condition during their complex metamorphic history similar to exhumed UHP ultramafic rocks in modern subduction zone channels.

关键词： Titanian chondrodite Titanian clinohumite Isua supracrustal belt UHP Deserpentinization

Deterministic and replaceable transfer of silver flakes for microcavities

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2023年第3期18卷 139-146页

作者： Tingting Wang Zhihao Zang Yuchen Gao Kenji Watanabe Takashi Taniguchi Wei Bao Yu Ye State Key Laboratory for Mesoscopic Physics and Frontiers Science center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation center of Quantum Matter Beijing 100871China research center for Functional Materials National Institute for Materials Science1-1 NamikiTsukuba305-0044Japan International center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba305-0044Japan Electrical&Computer Engineering University of Nebraska-LincolnLincolnNE 68588USA Yangtze Delta Institute of Optoelectronics Peking UniversityNantong 226010China

How to fabricate high-quality microcavities simply and at low cost without causing damage to environmentally sensitive active layers such as perovskites are crucial for the studies of exciton–polaritons,however,it remains challenging in the field of microcavity ***,once the top mirror is deposited,the detuning of the microcavity is fixed and there is no easy way to tune ***,we have developed a method for deterministically transferring silver mirrors,which is relatively simple and guarantees the active layer from damaging of high temperature,particle bombardment,etc.,during the deposition of the top ***,with the help of a glass probe,we demonstrate a replaceable silver transfer method to tune the detuning of the microcavity,thereby changing the coupling of photons and excitons *** developed deterministic and replaceable silver mirror transfer methods will provide the capability to fabricate high-quality and tunable microcavities and play an active role in the development of the exciton–polariton field.

关键词： silver microcavity transfer perovskite

PCA-based 3D Shape Reconstruction of Human Foot Using Multiple Viewpoint Cameras

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2008年第3期5卷 217-225页

作者： Edmée Amstutz Tomoaki Teshima Makoto Kimura Masaaki Mochimaru Hideo Saito Graduate School of Science and Technology Keio University Digital Human research center National Institute of Advanced Industrial Science and Technology(AIST)

This paper describes a multiple camera-based method to reconstruct the 3D shape of a human foot. From a foot database, an initial 3D model of the foot represented by a cloud of points is built. The shape parameters, which can characterize more than 92% of a foot, are defined by using the principal component analysis method. Then, using ＂active shape models＂, the initial 3D model is adapted to the real foot captured in multiple images by applying some constraints （edge points＇ distance and color variance）. We insist here on the experiment part where we demonstrate the efficiency of the proposed method on a plastic foot model, and also on real human feet with various shapes. We propose and compare different ways of texturing the foot which is needed for reconstruction. We present an experiment performed on the plastic foot model and on human feet and propose two different ways to improve the final 3D shapers accuracy according to the previous experiments＇ results. The first improvement proposed is the densification of the cloud of points used to represent the initial model and the foot database. The second improvement concerns the projected patterns used to texture the foot. We conclude by showing the obtained results for a human foot with the average computed shape error being only 1.06 mm.

关键词： Shape measurement 3D reconstruction from multiview cameras principal component analysis

Internal structures and high-velocity frictional properties of Longmenshan fault zone at Shenxigou activated during the 2008 Wenchuan earthquake

在线全文

学校读者我要写书评

暂无评论

Earthquake Science 2014年第5期27卷 499-528页

作者： Yu Wang Shengli Ma Toshihiko Shimamoto Lu Yao Jianye Chen Xiaosong Yang Honglin He Jiaxiang Dang Linfeng Hou Tetsuhiro Togo State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake Administration National center for active fault Studies Institute of GeologyChina Earthquake Administration Earthquake Administration of Zhejiang Province Seismotectonics research Group Institute of Earthquake and Volcano GeologyNational Institute of Advanced Industrial Science and Technology

This paper reports internal structures of a wide fault zone at Shenxigou,Dujiangyan,Sichuan province,China,and high-velocity frictional properties of the fault gouge collected near the coseismic slip zone during the 2008 Wenchuan *** offset and horizontal displacement at the trench site were 2.8 m（NW side up）and 4.8 m（right-lateral）,*** fault zone formed in Triassic sandstone,siltstone,and shale about 500 m away from the Yingxiu-Beichuan fault,a major fault in the Longmenshan fault system.A trench survey across the coseismic fault,and observations of outcrops and drill cores down to a depth of 57 m revealed that the fault zone consists of fault gouge and fault breccia of about0.5 and 250-300 m in widths,respectively,and that the fault strikes N62°E and dips 68° to *** conglomerates were recovered beneath the fault in the drilling,so that the fault moved at least 55 m along the coseismic slip zone,experiencing about 18 events of similar *** fault core is composed of grayish gouge（GG） and blackish gouge（BG） with very complex slip-zone *** contains low-crystalline graphite of about 30 %.High-velocity friction experiments were conducted at normal stresses of 0.6-2.1 MPa and slip rates of 0.1-2.1 m/*** GG and BG exhibit dramatic slip weakening at constant high slip rates that can be described as an exponential decay from peak friction coefficient lpto steadystate friction coefficient lssover a slip-weakening distance *** of GG and BG is characterized by overlapped slip-zone structures and development of sharp slickenside surfaces,*** of our data with those reported for other outcrops indicates that the high-velocity frictional properties of the Longmenshan fault zones are quite uniform and the high-velocity weakening must have promoted dynamic rupture propagation during the Wenchuan earthquake.

关键词： Wenchuan earthquake - Longmenshan faultsystem - Shenxigou fault zone fault zone structures High-velocity friction

research on Distributed Coordination Control Method for Microgrid System Based on Finite-time Event-triggered Consensus Algorithm

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electrical Engineering 2024年第2期10卷 103-115页

作者： Lizhen Wu Heng Yang Jianping Wei Wendong Jiang College of Electrical and Information Engineering Lanzhou University of TechnologyLanzhou 730050China National active Distribution Network Technology research center Beijing Jiaotong UniversityBeijing 100044China

Microgrids are networked control systems with multiple distributed generators(DGs).Microgrids are associated with many problems,such as communication delays,high sampling rates,and frequent controller updates,which make it challenging to realize coordination control among the ***,finite-time consensus algorithms and event-triggered control methods are combined to propose a distributed coordination control method for microgrid *** DG in the microgrid system serves as an agent node in the control network,and a distributed secondary controller is designed using finite-time consensus algorithm,such that the frequency and voltage restoration control has a faster convergence time and better anti-interference *** event-triggered function was designed based on the state information of the *** controller exchanges the state information at the trigger *** stability is analyzed using the Lyapunov stability theory,and it is verified that the controller cannot exhibit the Zeno phenomenon in the event-triggered process.A simulation platform was developed in Matlab/Simulink to verify that the proposed control method can effectively reduce the frequency of controller updates during communication delays and the burden on the communication network.

关键词： Microgrid event-triggered control distributed secondary control finite-time consensus algorithm coordination control