检索结果-南通市图书馆

Horizontal-to-vertical spectral ratio inversion method based on multimodal forest optimization algorithm

在线全文

学校读者我要写书评

暂无评论

Global Geology 2024年第3期27卷 167-176页

作者： CHEN Xuanning HAN Fuxing gao zhenghui sun zhangqing HAN Jiangtao College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China

The exploration of urban underground spaces is of great significance to urban planning,geological disaster prevention,resource exploration and environmental ***,due to the existing of severe interferences,conventional seismic methods cannot adapt to the complex urban environment *** adopting the single-node data acquisition method and taking the seismic ambient noise as the signal,the microtremor horizontal-to-vertical spectral ratio(HVSR)method can effectively avoid the strong interference problems caused by the complex urban environment,which could obtain information such as S-wave velocity and thickness of underground formations by fitting the microtremor HVSR ***,HVSR curve inversion is a multi-parameter curve fitting *** conventional inversion methods can easily converge to the local minimum,which will directly affect the reliability of the inversion ***,the authors propose a HVSR inversion method based on the multimodal forest optimization algorithm,which uses the efficient clustering technique and locates the global optimum *** on synthetic data show that the inversion results of the proposed method are consistent with the forward *** the adaption and stability to the abnormal layer velocity model are *** results of the real field data are also verified by the drilling information.

关键词： microtremor HVSR method multimodal forest optimization algorithm HVSR curve inversion

Horizontal-to-vertical spectral ratio inversion method based on multimodal forest optimization algorithm

在线全文

学校读者我要写书评

暂无评论

Three-dimensional dynamic sea surface modeling based on ocean wave spectrum

世界地质·英文版 2024年第3期 167页

作者： CHEN Xuanning HAN Fuxing gao zhenghui sun zhangqing HAN Jiangtao

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2021年第10期40卷 38-48页

作者： Zhimiao Chang Fuxing Han zhangqing sun.zhenghui gao Lili Wang College of Geoexploration Science and Technology Jilin UniversityChangchun 130026China Geophysical Exploration and Research Institute of Jilin Oilfield Songyuan 138006China

In conventional marine seismic exploration data processing,the sea surface is usually treated as a horizontal free ***,the sea surface is affected by wind and waves and there often exists dynamic small-range *** dynamic fluctuations will change the energy propagation path and affect the final imaging *** theoretical research,different sea surface conditions need to be described,so it is necessary to study the modeling method of dynamic undulating sea *** from the commonly used sea surface mathematical simulation methods,this paper mainly studies the realization process of simple harmonic wave and Gerstner wave sea surface simulation methods based on ocean wave spectrum,and compares their advantages and *** at the shortcomings of the simple harmonic method and Gerstner method in calculational speed and sea surface simulation effect,a method based on wave equation and using dynamic boundary conditions for sea surface simulation is *** calculational speed of this method is much faster than the commonly used simple harmonic method and Gerstner wave *** addition,this paper also compares the new method with the more commonly used higher-order spectral methods to show the characteristics of the improved wave equation method.

关键词： sea surface simulation simple harmonic Gerstner wave wave equation ocean wave spectrum high-order spectral method

High-Energy Batteries:Beyond Lithium-Ion and Their Long Road to Commercialisation

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第6期14卷 116-164页

作者： Yulin gao zhenghui Pan Jianguo sun Zhaolin Liu John Wang Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore ST Engineering Advanced Material Engineering Pte.Ltd. Singapore 619523Singapore Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)Singapore 138634Singapore School of Materials Science and Engineering Tongji UniversityShanghai 201804China

Rechargeable batteries of high energy density and overall performance are becoming a critically important technology in the rapidly changing society of the twenty-first *** lithium-ion batteries have so far been the dominant choice,numerous emerging applications call for higher capacity,better safety and lower costs while maintaining sufficient *** design space for potentially better alternatives is extremely large,with numerous new chemistries and architectures being simultaneously *** include other insertion ions(*** and numerous multivalent ions),conversion electrode materials(***,metallic anodes,halides and chalcogens)and aqueous and solid ***,each of these potential“beyond lithium-ion”alternatives faces numerous challenges that often lead to very poor cyclability,especially at the commercial cell level,while lithium-ion batteries continue to improve in performance and decrease in *** review examines fundamental principles to rationalise these numerous developments,and in each case,a brief overview is given on the advantages,advances,remaining challenges preventing cell-level implementation and the state-of-the-art of the solutions to these ***,research and development results obtained in academia are compared to emerging commercial examples,as a commentary on the current and near-future viability of these“beyond lithium-ion”alternatives.

关键词： High energy density Beyond lithium-ion batteries Multivalent-ion batteries Conversion electrode materials Electrolyte

Will lithium-sulfur batteries be the next beyond-lithium ion batteries and even much better?

在线全文

学校读者我要写书评

暂无评论

InfoMat 2022年第9期4卷 1-16页

作者： Jianguo sun Tuo Wang Yulin gao zhenghui Pan Runpeng Hu John Wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore ST Engineering Advanced Material Engineering Pte.Ltd. SingaporeSingapore School of Materials Science and Engineering Tongji UniversityShanghaiPeople's Republic of China Institute of Materials Research and Engineering A*StarSingaporeSingapore

Lithium-ion batteries(LIBs)are undoubtedly the current working-horse in almost all portable electronic devices,electric vehicles,and even large-scale stationary energy *** the problems faced by LIBs,a big question arises as to which battery(ies)would be the“Beyond LIBs”*** the front-runners,lithium-sulfur batteries(LSBs)have been extensively pursued owing to their intrinsically high energy density and extremely low *** the steady and sometimes exciting progress reported on sulfur chemistry and cell performance at laboratory scales over the past decade,one of the major bottlenecks is the poor *** this perspective,we examine the key challenges and opportunities faced by LSBs,as well as approaches at the materials,electrode/electrolyte and cell integration levels that can be taken to transform LSBs from a front-runner to a real leading champion in the pursuit of the“Beyond LIBs”.While the key new mechanistic insights are very important,we propose a set of the near-future research directions for both the liquid and solid state LSBs,where the currently on-going parallel pursuits of both liquid and solid LSBs will be ***“liquid current”will gradually be taken over by“solid future”in the expected LSBs commercialization in the coming decade.

关键词： electrocatalysis lithium-sulfur batteries solid and liquid electrolytes sulfur chemistry

Electrochromic-Induced Rechargeable Aqueous Batteries: An Integrated Multifunctional System for Cross-Domain Applications

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

Nano-Micro Letters 2023年第6期15卷 304-334页

作者： Qi Zhao zhenghui Pan Binbin Liu Changyuan Bao Ximeng Liu Jianguo sun Shaorong Xie Qing Wang John Wang Yanfeng gao Department of Materials Science and Engineering Shanghai UniversityShanghai 200444People’s Republic of China Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore Department of Materials Science and Engineering Tongji UniversityShanghai 200092People’s Republic of China Department of Computer Engineering and Science Shanghai UniversityShanghai 200444People’s Republic of China National University of Singapore(Chongqing)Research Institute Chongqing 401120People’s Republic of China Institute of Materials Research and Engineering A*StarSingapore 138634Singapore Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008People’s Republic of China

Multifunctional electrochromic-induced rechargeable aqueous batteries(MERABs) integrate electrochromism and aqueous ion batteries into one platform, which is able to deliver the conversion and storage of photo-thermal-electrochemical *** ion batteries compensate for the drawbacks of slow kinetic reactions and unsatisfied storage capacities of electrochromic devices. On the other hand, electrochromic technology can enable dynamically regulation of solar light and heat radiation. However,MERABs still face several technical issues, including a trade-off between electrochromic and electrochemical performance, low conversion efficiency and poor service life. In this connection, novel device configuration and electrode materials, and an optimized compatibility need to be considered for multidisciplinary applications. In this review,the unique advantages, key challenges and advanced applications are elucidated in a timely and comprehensive manner. Firstly, the prerequisites for effective integration of the working mechanism and device configuration, as well as the choice of electrode materials are examined. Secondly, the latest advances in the applications of MERABs are discussed, including wearable, self-powered, integrated systems and multisystem conversion. Finally, perspectives on the current challenges and future development are outlined, highlighting the giant leap required from laboratory prototypes to large-scale production and eventual commercialization.

关键词： Electrochromic Aqueous batteries Multifunctional Integration

地震声波数值模拟中人工边界条件的差别与组合

在线全文

学校读者我要写书评

暂无评论

吉林大学学报（地球科学版） 2022年第1期52卷 261-269页

作者：韩复兴王若雯孙章庆高正辉吉林大学地球探测科学与技术学院长春130026

地震数值模拟中选取的有限计算区域产生的边界反射会干扰正常波场模拟结果,因此引入人工边界条件来降低边界反射的影响。本文针对PML(perfectly matched layer)边界条件的解耦与非解耦差分形式,应用不同空间差分阶数进行地震波场数值模... 详细信息

地震数值模拟中选取的有限计算区域产生的边界反射会干扰正常波场模拟结果,因此引入人工边界条件来降低边界反射的影响。本文针对PML(perfectly matched layer)边界条件的解耦与非解耦差分形式,应用不同空间差分阶数进行地震波场数值模拟。空间差分阶数提高后,非解耦PML差分形式在计算效率和实现方式上均更具优势。针对CE(Clayton-Engquist)边界条件受入射波入射角度限制、边界处精度低吸收效果不好等问题,将2阶CE边界条件和PML边界条件组合成一种新的组合边界条件,在保证吸收效果的同时减少衰减带厚度,从而达到提高计算效率的目的。数值模拟结果验证了算法的有效性。

关键词：数值模拟有限差分完全匹配层法组合边界条件

Research on ray tracing in VTI medium based on different models

在线全文

学校读者我要写书评

暂无评论

Global Geology 2015年第4期18卷 245-251页

作者： JI Songda sun Jianguo gao zhenghui sun Hui WANG Qianlong HUANG Xinguo College of Geo-Exploration Science and Technology Jilin University

The study on seismic anisotropy is one of the difficult problems in the field of geophysics *** a method of ray theory,the seismic anisotropy ray tracing is an important means to study the anisotropic seismic wave propagation. The traditional ray tracing system formulated in terms of elastic parameters in the anisotropy is more complicated than that in the isotropic case. Considering the difficulty,a kind of ray tracing system formulated in terms of phase velocity and group velocity is introduced. The new method is similar to the expressions for isotropic media,and avoids the trouble of determining the eigenvalue vector at each time. Besides the ray tracing numerical simulation of different models of vertical transversely isotropic( VTI) medium is carried out,in order to verify the accuracy and applicability of the method and further study the characteristics of wave field propagation in different VTI mediums. The study is certainly valuable in reference for later processing of the anisotropic seismic data.

关键词： VTI medium ray tracing phase velocity model trial

High-performance all-polymer solar cells enabled by a novel low bandgap non-fully conjugated polymer acceptor

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第8期64卷 1380-1388页

作者： Qunping Fan Ruijie Ma Tao Liu Jianwei Yu Yiqun Xiao Wenyan Su Guilong Cai Yuxiang Li Wenhong Peng Tao Guo zhenghui Luo Huiliang sun Lintao Hou Weiguo Zhu Xinhui Lu Feng gao Ellen Moons Donghong Yu He Yan Ergang Wang Department of Chemistry and Chemical Engineering Chalmers University of TechnologyGöteborgSE-41296Sweden Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction Hong Kong University of Science and TechnologyKowloonHong Kong999077China Department of Physics Chemistryand Biology(IFM)Linköping UniversityLinköping58183Sweden Department of Physics The Chinese University of Hong KongNew Territories999077Hong KongChina Department of Engineering and Physics Karlstad University65188KarlstadSweden Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Siyuan LaboratoryDepartment of PhysicsJinan UniversityGuangzhou510632China School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an710054China School of Materials Science and Engineering Jiangsu Key Laboratory of Environmentally Friendly Polymeric MaterialsChangzhou UniversityChangzhou213164China Department of Chemistry and Bioscience Aalborg UniversityDK-9220AalborgDenmark Sino-Danish Center for Education and Research AarhusDK-8000Denmark School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

The non-fully conjugated polymer as a new class of acceptor materials has shown some advantages over its small molecular counterpart when used in photoactive layers for all-polymer solar cells(all-PSCs),despite a low power conversion efficiency(PCE)caused by its narrow absorption ***,a novel non-fully conjugated polymer acceptor PFY-2TS with a low bandgap of~1.40 eV was developed,via polymerizing a largeπ-fused small molecule acceptor(SMA)building block(namely YBO)with a non-conjugated thioalkyl *** with its precursor YBO,PFY-2TS retains a similar low bandgap but a higher LUMO ***,compared with the structural analog of YBO-based fully conjugated polymer acceptor PFY-DTC,PFY-2TS shows a similar absorption spectrum and electron mobility,but significantly different molecular crystallinity and aggregation properties,which results in optimal blend morphology with a polymer donor PBDB-T and physical processes of the device in *** a result,PFY-2TS-based all-PSCs achieved a PCE of 12.31%with a small energy loss of 0.56 eV enabled by the reduced non-radiative energy loss(0.24 eV),which is better than that of 11.08%for the PFY-DTC-based *** work clearly demonstrated that non-fully conjugated polymers as a new class of acceptor materials are very promising for the development of high-performance all-PSCs.

关键词： all-polymer solar cells morphology non-fully conjugated polymer acceptors energy loss power conversion efficiency