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Applied Geophysics 2020年第2期17卷 208-220,315页

作者： Huang Jian-Ping Mu Xin-Ru Li Zhen-Chun Li Qing-Yang Yuan Shuang-Qi Guo Yun-Dong Department of Geophysics School of GeosciencesChina University of PetroleumQingdao 266580China Geophysical Exploration Research Institute Zhongyuan Oilfi eld CompanyHenan Puyang 457001China Sinopec Geophysical Research Institute Nanjing 211103China

The anisotropic properties of subsurface media cause waveform distortions in seismic wave propagation,resulting in a negative infl uence on seismic *** addition,wavefields simulated by the conventional coupled pseudo-acoustic equation are not only aff ected by SV-wave artifacts but are also limited by anisotropic *** propose a least-squares reverse time migration(LSRTM)method based on the pure q P-wave equation in vertically transverse isotropic media.A fi nite diff erence and fast Fourier transform method,which can improve the effi ciency of the numerical simulation compared to a pseudo-spectral method,is used to solve the pure q P-wave *** derive the corresponding demigration operator,migration operator,and gradient updating formula to implement the *** tests on the Hess model and field data confirm that the proposed method has a good correction eff ect for the travel time deviation caused by underground anisotropic ***,it signifi cantly suppresses the migration noise,balances the imaging amplitude,and improves the imaging resolution.

关键词： Pure qP-wave equation vertically transverse isotropic media LSRTM finite difference and fast Fourier transform field data

Beamlet prestack depth migration and illumination： A test based on the Marmousi model

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Applied Geophysics 2006年第4期3卷 203-209页

作者： Ye Yueming Li Zhenchun Han Wengong Liu Qingmin University of Petroleum Shandong Dongying 257061 China Shengli Oiltield company limited Shandong Dongying 257100 China

Beamlet sources have strong local and directional character and can easily accomplish local illumination and migration. Besides, they provide better migration results than conventional migration methods. We introduce the basic principles of beamlet prestack depth migration that includes a windowed Fourier transform and frame theory. We explain the Gabor-Daubechies （G-D） frame based on a Gaussian function. Beamlet decomposition provides information on the local space and direction of wavefield. We synthesize the beamlet source and beamlet records in the wavelet domain using both rectangle and Gaussian windows and then extrapolate the synthesized data with a Fourier finite-difference operator. We test the method using the standard Marmousi model. By comparing and analyzing the migration results of single directional beamlet and beamlets with different windows and directions, we demonstrate the validity of the prestack depth migration with Gaussian beamlets method.

关键词： beamlet, prestack depth migration frame theory. Gaussian window function.

Thermodynamic Reevaluation and Experimental Validation of the CsNO3-KNO3-NaNO3 System and Its Subsystems

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Chemical Research in Chinese Universities 2017年第1期33卷 122-128页

作者： AN Xuehui ZHANG Peng CHENG Jinhui CHEN Shuanglin WANG Jianqiang Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 P. R. China State Key Laboratory of Advanced Special Steel Shanghai University Shanghai 200072 P. R. China CompuTherm. Limited Liability Company Madison WI 53 719 USA

Phase equilibria and thermodynamic properties of the CsNO3-KNO3-NaNO3 system and its three subsys- tems were optimized thermodynamically and validated experimentally. The liquid and end solid solution phases of the KNO3-NaNO3 and CsNO3-KNO3 systems were modeled using the substitutional solution and compound energy formalism models, respectively. The CsNO3-KNO3-NaNO3 ternary system was described thermodynamically based on the self-consistent thermodynamic parameters of the three binary systems. A set of thermodynamic parameters was obtained to reproduce the available information on the thermodynamic properties and phase equilibria. Melting temperature, enthalpy, and specific heat capacity of a eutectic sample were determined using differential scanning calorimetry（DSC）. The results show a good consistency with the calculated results, suggesting the reliability of the current thermodynamic database. This work is useful for the construction of multicomponent nitrates and to provide guidance for the development of new medium for thermal energy storage.

关键词： Thermal energy storage Nitrate Calphad Phase diagram

Insight into the effect of thick graphite electrodes towards high-performance cylindrical Ni-rich NCA90 Li-ion batteries

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Journal of Energy Chemistry 2023年第12期87卷 322-333,I0009页

作者： Nattanon Joraleechanchai Thitiphum Sangsanit Kan Homlamai Purin Krapong Montree Sawangphruk Centre of Excellence for Energy storage Technology(CEST) Department of Chemical and Biomolecular EngineeringSchool of Energy Science and EngineeringVidyasirimedhi Institute of Science and TechnologyRayong 21210Thailand

This study explored the complex effect of graphite tortuosity on the electrochemical performance of Ni-rich NCA90 Li-ion batteries(LIBs).Different levels of graphite anode tortuosity were analyzed,revealing that low-tortuosity electrodes had better graphite *** in-plane tortuosities of the graphite anode electrodes examined were 1.70,1.94,2.05,and 2.18,while their corresponding through-plane tortuosities were 4.74,6.94,8.19,and ***-operando X-ray diffraction and differential electrochemical mass spectrometry were employed to investigate the charge storage mechanism and gas *** study revealed that while graphite electrode tortuosity impacted the amount of Li present in the lithiated graphite phase due to diffusion constraints,it did not affect gas *** Li-ion utilization in low-tortuosity electrodes was higher than that in high-tortuosity electrodes because of solid-diffusion ***,the galvanostatic intermittent titration technique(GITT) was employed to investigate a lithium-ion diffusion *** results indicate that the lithium-ion diffusion coefficient exhibits a significant difference only during LiC_(6) phase *** also observed that the use of a lower tortuosity electrode leads to improved lithium-ion ***,graphite utilization is influenced by the porous electrode *** tests adhering to UN38.3 guidelines verified battery *** study demonstrated the practical application of optimized NCA90 LIB cells with diverse graphite electrode tortuosities in a high-performance Lamborghini GoKart,paving the way for further advancements in Ni-rich LIB technology.

关键词： Li-ion batteries Tortuosity Ni-rich NCA90 cathode On-line gas detection In-operando XRD

Bi-level Energy Trading Model Incorporating Large-scale Biogas Plant and Demand Response Aggregator

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 567-578页

作者： Hanyu Yang Canbing Li Ruanming Huang Feng Wang Lili Hao Qiuwei Wu Long Zhou College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjingChina School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Economic and Technological Research Institute of Shanghai Electric Power company ShanghaiChina College of Electrical and Information Engineering Hunan UniversityChangsha 410082China Tsinghua-Berkeley Shenzhen Institute Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Information Center of Guangdong Power Grid company limited Guangzhou 528000China

Increasing intermittent renewable energy sources(RESs)intensifies the imbalance between demand and generation,entailing the diversification of the deployment of electrical energy storage systems(ESSs).A large-scale biogas plant(LBP)installed with heating devices and biogas energy storage(BES)usually exhibits a storage-like characteristic of accommodating an increasing penetration level of RES in rural areas,which is addressed in this *** utilizing the temperature-sensitive characteristic of anaerobic digestion that enables the LBP to exhibit a storage-like characteristic,this paper proposes a bi-level energy trading model incorporating LBP and demand response aggregator(DRA)*** this model,social welfare is maximized at the upper level while the profit of DRA is maximized at the lower *** with cases only with DRA,the results show that the proposed model with the LBP improves the on-site accommodation capacity of photovoltaic(PV)generation up to 6.3%,18.1%,and 18.9%at 30%,40%,and 50%PV penetration levels,respectively,with a better economic *** nonlinear bi-level problem is finally recast by a single-level mathematical program with equilibrium constraints(MPEC)using Karush-Kuhn-Tucker(KKT)conditions and solved by the Cplex *** effectiveness of the proposed model is validated using a 33-bus test system and a sensitivity analysis is provided for analyzing what parameter influences the accommodation capacity most.

关键词： Biomass energy renewable energy resource energy trading demand response distribution system

Potential assessment of CO_(2)geological storage based on injection scenario simulation:A case study in eastern Junggar Basin

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Journal of Groundwater Science and Engineering 2021年第4期9卷 279-291页

作者： Xin Ma Dong-guang Wen Guo-dong Yang Xu-feng Li Yu-jie Diao Hai-hai Dong Wei Cao Shu-guo Yin Yan-mei Zhang Center for Hydrogeology and Environmental Geology Survey China Geological SurveyBaoding 071051HebeiChina Key Laboratory of Carbon Dioxide Geological storage China Geological SurveyBaoding 071051HebeiChina College of Resources and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan University of Science and TechnologyWuhan 430081China Exploration and Development Research Institute PetroChina Xinjiang Oilfield CompanyKaramay 834000China Institute of Geology of Pudong Oil Production Plant Sinopec Zhongyuan OilfieldPuyang 457001China Exploration and Development Research Institute of Zhundong Oil Production Plant Petro China Xinjiang Oilfield CompanyFukang831511XinjiangChina

Carbon Capture and storage(CCS)is one of the effective means to deal with global warming,and saline aquifer storage is considered to be the most promising storage *** Basin,located in the northern part of Xinjiang and with a large distribution area of saline aquifer,is an effective carbon storage *** on well logging data and 2D seismic data,a 3D heterogeneous geological model of the Cretaceous Donggou Formation reservoir near D7 well was constructed,and dynamic simulations under two scenarios of single-well injection and multi-well injection were carried out to explore the storage potential and CO2 storage mechanism of deep saline aquifer with real geological conditions in this *** results show that within 100 km^(2)of the saline aquifer of Donggou Formation in the vicinity of D7 well,the theoretical static CO_(2)storage is 71.967×106 tons(P50)①,and the maximum dynamic CO_(2)storage is 145.295×106 tons(Case2).The heterogeneity of saline aquifer has a great influence on the spatial distribution of CO_(2)in the *** multi-well injection scenario is conducive to the efficient utilization of reservoir space and safer for *** on the results from theoretical static calculation and the dynamic simulation,the effective coefficient of CO_(2)storage in deep saline aquifer in the eastern part of Xinjiang is recommended to be 4.9%.This study can be applied to the engineering practice of CO_(2)sequestration in the deep saline aquifer in Xinjiang.

关键词： CO_(2)geological storage Deep saline aquifer Potential assessment Injection scenarios Numerical simulation Junggar Basin

Recent advances in multifunctional electrochromic energy storage devices and photoelectrochromic devices

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Science China Chemistry 2017年第1期60卷 13-37页

作者： Zhongqiu Tong Yanlong Tian Hongming Zhang Xingang Li Junyi Ji Huiying Qu Na Li Jiupeng Zhao Yao Li College of Materials and Metallurgical Engineering Guizhou Institute of Technology Guiyang 550003 China Center for Composite Materials and Structure Harbin Institute of Technology Harbin 150001 China School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China Guizhou Construction Science Research & Design Institute limited company of China State construction Engineering Corporation Guiyang 550006 China

Multifunctional devices integrated with electrochromism and energy storage or energy production functions are attractive because these devices can be used as an effective approach to address the energy crisis and environmental pollution in society today. In this review, we explain the operation principles of electrochromic energy storage devices including electrochromic supercapacitors,electrochromic batteries, and the photoelectrochromic devices. Furthermore, the material candidates and structure types of these multifunctional devices are discussed in detail. The major challenges of these devices along with a further outlook are highlighted at the end.

关键词： electrochromic multifunctional devices electrochromic supercapacitors electrochromic batteries photoelectrochromic devices

Research on Electronic Document Management System Based on Cloud Computing

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Computers, Materials & Continua 2021年第3期66卷 2645-2654页

作者： Jin Han Cheng Wang Jie Miao Mingxin Lu Yingchun Wang Jin Shi Nanjing University of Information Science&Technology Nanjing210044 China 2Research Institute of State Grid Hunan Electric Power Company LimitedChangsha410007 China 3Nanjing UniversityNanjing210093 China 4Waterford Institute of TechnologyWaterford CityX91 K0EKIreland

With the development of information technology,cloud computing technology has brought many conveniences to all aspects of work and *** the continuous promotion,popularization and vigorous development of e-government and e-commerce,the number of documents in electronic form is getting larger and *** document is an indispensable main tool and real record of e-government and business *** to scientifically and effectively manage electronic documents?This is an important issue faced by governments and enterprises in improving management efficiency,protecting state secrets or business secrets,and reducing management *** paper discusses the application of cloud computing technology in the construction of electronic file management system,proposes an architecture of electronic file management system based on cloud computing,and makes a more detailed discussion on key technologies and *** electronic file management system is built on the cloud architecture to enable users to upload,download,share,set security roles,audit,and retrieve files based on multiple *** electronic file management system based on cloud computing can make full use of cloud storage,cloud security,and cloud computing technologies to achieve unified,reliable,and secure management of electronic files.

关键词： Cloud computing technology electronic file management system cloud security

Coordination and Optimization of Muti-region Building Virtual Power Plant with Photovoltaic and Wind-power Units

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Coordination and Optimization of Muti-region Building Virtua...

Fabrication of LiOH-metal organic framework derived hierarchical porous host carbon matrix composites for seasonal thermochemical energy storage

作者： Chen FANG Xiao-long HU Xiu YANG Ying-jie TIAN Hao-jing WANG East China Electric Power Test & Research Institute company limited Shanghai University of Electric Power

In order to solve the unstable or economical shortages of power grids and realize the coordinated optimization of distributed energy supply systems in different regions of virtual power plant（VPP）,a coordinated optimization scheduling model for multi-region building virtual power plants with wind-power and photovoltaic units is *** VPP is made up of wind turbine,household photovoltaic,energy storage system（ESS） and electric vehicles（EV）.Through inter-regional comprehensive energy interconnection,multi-regional VPP power is *** order to make the electric energy sharing within VPP reasonable,the optimal model with the objective function of reducing the transaction cost between VPP and distribution network,the maintenance cost of wind-power and photovoltaic units and the maintenance cost of EV was ***,the validity of the proposed model is verified by a case study of a typical building VPP with a residential building and a commercial *** simulation results show that the proposed method can realize the coordinated and optimal power scheduling of different regions and different types of aggregation units,and effectively reduce the net cost of VPP.

关键词： Virtual Power Plant(VPP) Coordinated scheduling Energy Market(EM)

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Nano Research 2022年第9期15卷 8028-8038页

作者： Xiangyu Yang Shijie Li Jianguo Zhao Hongyu Huang Lisheng Deng School of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Institute of Carbon Materials Science Shanxi Datong UniversityDatong 037009China Key Laboratory of Renewable Energy Guangdong Provincial Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Guangdong Intelligent Filling Technology limited company Foshan 528137China

By virtue of its long lifespan and outstanding storage intensity with near-zero heat loss,salt hydrate thermochemical energy storage(TES)materials provide a feasible option for the effective use of renewable energy and overcoming its unsynchronized supply and ***,an activated porous carbon originating from the zeolite imidazolate framework(ZHCM)is fabricated and served as the carbon matrix for the LiOH TES *** as-synthesized Li/ZHCM2-40 not only has excellent storage intensity(maximum 2414.2 kJ·kg^(−1))with low charging temperature,but also shows great hydration properties stemming from the ultrahigh surface area and hierarchical porous structure of ***,this composite material exhibits superior thermal conductivity,while its storage intensity is only attenuated by 10.2%after 15 times of consecutive charge-discharge process,revealing its outstanding cycle *** the numerical simulation results also demonstrate its superior heat transfer *** developed LiOH TES composite may afford a new avenue for efficient low-grade thermochemical energy storage and liberate the possibility of further exploration of metal organic frameworks derived porous carbon matrix in the future.

关键词： LiOH TES composite ZIF-8 derived porous carbon low-grade thermochemical energy storage cycle stability