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Understanding Surface Water-Groundwater Conversion Relationship and Associated Hydrogeochemistry Evolution in the Upper Reaches of Luan River Basin, North China

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Journal of Earth Science 2024年第3期35卷 1010-1023页

作者： le.zhao Chunli Su Wenbo Liu Xianjun Xie School of Environmental Studies China University of GeosciencesWuhan 430078China State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Ministry of Ecology and EnvironmentWuhan 430078China China Geological Environmental Monitoring Institute Beijing 100081China

Luan River is the main water source in Beijing-Tianjin-Hebei region,northern China,where the groundwater system is vulnerable.and pollution issue is *** is significant for regional groundwater resources protection to identify the hydrogeochemistry evolution and affecting factors along flow direction occurred in the upper reaches,especially the surface water-groundwater(SWGW)conversion *** this study,recharge,conversion and geochemistry evolution of SW and GW were elucidated based on physical-hydrochemical indicators and stable.isotopes in 36 GW sample. and 20 SW sample.,which were colle.ted in July 2019 and July *** factor analysis was further utilized to determine the main factors responsible.for regional hydrogeochemical *** indicate that GW recharged SW in plateau area,and SW and GW recharged each other in typical Alpine valle. *** hydrochemical types are HCO3-Ca·Mg and HCO3-Ca,and the hydrochemical evolution is dominated by weathering of silicate and carbonate *** cation exchange adsorption has minor impact on groundwater *** rise of SO42-and NO3-contents in groundwater is related to industrial and agricultural *** main controlling factors of SW hydrochemical components included recharge from groundwater,industrial and mining activities,explaining 90.04%of data ***,water-rock interaction,agricultural and domestic sewage are responsible.for GW quality,accounting for 83.38%.

关键词： groundwater water sources conversion relationship hydrogeochemical characteristics evolutional processes water-rock interaction factor analysis Luan River Basin.

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le.der-follower Optimal Sele.tion Method for Distributed Control System in Active Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 314-323页

作者： Jian le.Liangang zhao Cao Wang Qian Zhou Yang Wang School of Ele.trical Engineering and Automation Wuhan UniversityWuhan 430072China

Aiming at the shortcomings of a traditional centralized control in an active distribution network(AND),this paper proposes a le.der-follower distributed group cooperative control strategy to realize multiple.operation and control tasks for an *** distributed information exchange protocols of the distributed generation(DG)group devoted to node voltage regulation or exchange power control are developed using a DG power utilization ratio as the consensus *** these bases,this study further investigates the le.der optimal sele.tion method for a DG group to improve the response speed of the distributed control ***,a single.or multiple.le.der sele.tion model is established to minimize the constraints of the one-step convergence factor and the number of le.ders to improve the response speed of the distributed control *** simulation results of the IEEE 33 bus standard test system show the effectiveness of the proposed distributed control *** addition,the response speed of a DG control group can be improved effectively when the single.or multiple.le.ders are sele.ted optimally.

关键词： Active distribution1network consensus algorithm le.der-follower system mixed-integer semidefinite programming optimal distributed control

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A modified back analysis method for deep excavation with multi-objective optimization procedure

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1373-1387页

作者： Chenyang zhao le.Chen Pengpeng Ni Wenjun Xia Bin Wang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China Guangdong Research Center for Underground Space Exploitation Technology School of Civil EngineeringSun Yat-sen UniversityGuangzhou510275China Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai519000China Jiangsu Provincial Transportation Engineering Construction Bureau Nanjing210004China

Real-time prediction of excavation-induced displacement of retaining pile.during the deep excavation process is crucial for construction *** paper proposes a modified back analysis method with multi-objective optimization procedure,which enable. a real-time prediction of horizontal displacement of retaining pile.during *** opposed to the traditional stage-by-stage back analysis,time series monitoring data till the current excavation stage are utilized to form a multi-objective ***,the multi-objective particle.swarm optimization (MOPSO) algorithm is applied for parameter *** optimized model parameters are immediately adopted to predict the excavation-induced pile.deformation in the continuous construction *** achieve efficient parameter optimization and real-time prediction of system behavior,the back propagation neural network (BPNN) is established to substitute the finite ele.ent model,which is further imple.ented together with MOPSO for automatic *** proposed approach is applied in the Taihu tunnel excavation project,where the effectiveness of the method is demonstrated via the comparisons with the site monitoring *** method is reliable.with a prediction accuracy of more than 90%.Moreover,different optimization algorithms,including non-dominated sorting genetic algorithm (NSGA-II),Pareto Envelope-based Sele.tion Algorithm II (PESA-II) and MOPSO,are compared,and their influences on the prediction accuracy at different excavation stages are *** results show that MOPSO has the best performance for high dimensional optimization task.

关键词： Multi-objective optimization Back analysis Surrogate model Multi-objective particle.swarm optimization(MOPSO) Deep excavation

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Understanding the spatial interaction of ultrasounds based on three-dimensional dual-frequency ultrasonic field numerical simulation

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China Foundry 2024年第1期21卷 29-43页

作者： zhao-yang Yin Qi-chi le.Yan-chao Jiang Da-zhi zhao Qi-yu Liao Qi Zou Key Lab of Ele.tromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A transient 3D model was established to investigate the effect of spatial interaction of ultrasounds on the dual-frequency ultrasonic field in magnesium alloy *** effects of insertion depth and tip shape of the ultrasonic rods,input pressures and their ratio on the acoustic field distribution were discussed in ***,the spacing,angle.and insertion depth of two ultrasonic rods significantly affect the interaction between distinct *** a result,various acoustic pressure distributions and cavitation regions are *** spherical rods mitigate the longitudinal and transversal attenuation of acoustic pressure and expand the cavitation volume by 53.7%and 31.7%,respectively,compared to the plate and conical *** the input pressure will enlarge the cavitation region but has no effect on the acoustic pressure distribution *** acoustic pressure ratio significantly affects the pressure distribution and the cavitation region,and the best cavitation effect is obtained at the ratio of 2:1(P15:P20).

关键词： dual-frequency ultrasonic numerical model acoustic pressure spatial interaction magnesium alloy

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Performance Design of High-Temperature Chloride Salts as Thermal Energy Storage Material

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Journal of Thermal Science 2024年第2期33卷 479-490页

作者： zhao le.WANG Jingyao CUI Liu LI Baorang DU Xiaoze WU Hongwei Key Laboratory of Power Station Energy Transfer Conversion and System(North China Ele.tric Power University) Ministry of EducationBeijing102206China School of Energy and Power Engineering Lanzhou University of TechnologyLanzhou730050China School of Physics Engineering and Computer ScienceUniversity of HertfordshireHatfieldAL109ABUK

The chloride salts have great potential used as high-temperature thermal energy storage(TES) medium for the concentrated solar power *** this study,LiCl,KCl and CaCl_(2) were sele.ted as energy storage materials in order to further broaden the working temperature of ternary chloride salt and improve its energy storage *** new high-temperature energy storage ternary chloride composed of LiCl,KCl,and CaCl_(2) was developed based on the phase diagram generated by *** components of LiCl-KCl-CaCl_(2) with the mass ratio of 37.85%-53.38%-8.77%,30.90%-13.82%-55.28% and 1.78%-18.61%-79.61% were developed,of which the corresponding melting temperature(T_(m)) 340.93,433.57 and 626.85℃,respectively,was obtained *** that T_(m) of the third group of salts was too high,only the first two groups of salts were *** test showed that the actual melting point was only 0.46% and 1.64% different from the melting point predicted by *** thermal properties of the two ternary chloride salts were also *** solid and liquid-specific heat of ternary salts was determined by DSC using sapphire as the standard *** vapor pressure and decomposition temperature of ternary chloride salts were *** results showed that the vapor pressure of salt 1 was almost constant below 650℃ by ***,the TG results showed that the upper working temperature of salt 1 was 650℃ under the air *** addition,the ternary chloride salts after short-term cycling still exhibited excelle.t thermal properties,which reveale. that these good thermal properties make them have broad application prospects in high-temperature thermal energy storage systems.

关键词： chloride salts thermal energy storages thermal properties thermal stability

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Linearized waveform inversion for vertical transversely isotropic elastic media:Methodology and multi-parameter crosstalk analysis

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Petrole.m Science 2024年第1期21卷 252-271页

作者： Ke Chen Lu Liu Li-Nan Xu Fei Hu Yuan Yang Jia-Hui Zuo le.le.Zhang Yang zhao National Key Laboratory of Petrole.m Resources and Engineering Unconventional Petroleum Research InstituteChina University of Petroleum(Beijing)Beijing102249China Aramco Beijing Research Center Aramco AsiaBeijing100102China University of Lausanne LausanneCH-1015Switzerland Bureau of Geophysical Prospecting China National Petroleum CorporationZhuozhou 072750HebeiChina

Seismic migration and inversion are closely related techniques to portray subsurface images and identify hydrocarbon *** migration aims at obtaining structural images of subsurface geologic *** specifically,seismic migration estimates the refle.tivity function(stacked average refle.tivity or pre-stack angle.dependent refle.tivity)from seismic refle.tion *** the other hand,seismic inversion quantitatively estimates the intrinsic rock properties of subsurface *** seismic inversion methods are applicable.to detect hydrocarbon reservoirs that may exhibit lateral variations in the inverted *** there exist many differences,pre-stack seismic migration is similar with the first iteration of the general linearized seismic ***,seismic migration and inversion techniques assume an acoustic or isotropic elastic *** reservoirs such as shale.and tight sand formation have notable.anisotropic *** present a linearized waveform inversion(LWI)scheme for weakly anisotropic elastic media with vertical transversely isotropic(VTI)*** is based on two-way anisotropic elastic wave equation and simultaneously inverts for the localized perturbations(ΔVp_(0)/Vp_(0)/Vs_(0)/Vs_(0)/,Δ∈,Δδ)from the long-wavele.gth reference *** proposed VTI-elastic LWI is an iterative method that requires a forward and an adjoint operator acting on vectors in each *** derive the forward Born approximation operator by perturbation theory and adjoint operator via adjoint-state *** inversion has improved the quality of the images and reduces the multi-parameter crosstalk comparing with the adjoint-based *** have observed that the multi-parameter crosstalk proble. is more prominent in the inversion images for Thomsen anisotropy ***,the Thomsen parameter is the most difficult to *** also analyze the multi-parameter crosstalk using scattering radiation patte

关键词： Elastic Anisotropy le.st-squares imaging Waveform inversion Computational geophysics

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Simple.ele.trode assembly engineering:Toward a multifunctional le.d-acid battery

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Journal of Energy Chemistry 2024年第9期96卷 536-543页

作者： Xiaojuan Cao Xiaoyu Yan Kai zhao le.Ke Xiaoyi Jiang Lingjiao Li Ning Yan Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina Shenzhen Research Institute of Wuhan University Shenzhen 518057GuangdongChina

Ele.trochemical energy storage is a promising technology for the integration of renewable.***-acid battery is perhaps among the most successful commercialized systems ever since thanks to its excelle.t cost-effectiveness and safety *** of 165 years of development,the low energy density as well as the couple. power and energy density scaling restrain its wider application in real *** address this challe.ge,we optimized the configuration of conventional Pb-acid battery to integrate two gas diffusion *** novel device can work as a Pb-air battery using ambient air,showing a peak power density of 183 mW cm^(−2),which was comparable.with other state-of-the-art metal-O_(2)*** can also behave as a fuel cell,simultaneously converting H_(2)and air into ele.tricity with a peak power density of 75 mW cm^(−2).Importantly,this device showed little.performance degradation after 35 h of the longevity *** work shows the exciting potential of le.d battery technology and demonstrates the importance of battery architecture optimization toward improved energy storage capacity.

关键词： le.d-acid battery Decouple. ele.trode reaction Energy storage Discharge capacity Fuel cell

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Global gene expression profiling of perirenal brown adipose tissue whitening in goat kids reveals novel genes linked to adipose remodeling

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Journal of Animal Science and Biotechnology 2024年第3期15卷 1008-1026页

作者： le.zhao Haili Yang Minhao Li Min Xiao Xingchun Li le. Cheng Wenqiang Cheng Meixi Chen Yongju zhao Colle.e of Animal Science and Technology Southwest UniversityChongqing Key Laboratory of Herbivore ScienceChongqing 400715China

Background Brown adipose tissue(BAT)is known to be capable.of non-shivering thermogenesis under cold stimulation,which is related to the mortality of *** the previous study,we observed that goat BAT is mainly located around the kidney at birth,and changes to white adipose tissue(WAT)in the perirenal adipose tissue of goats within one month after ***,the regulatory factors underlying this change is remain *** this study,we systematically studied the perirenal adipose tissue of goat kids in histological,cytological,and accompanying mole.ular le.el changes from 0 to 28 d after *** Our study found a higher mortality rate in winter-born goat kids,with goat birthing data *** we used thermal imaging revealing high temperature in goat hips at postnatal 0 d and gradually decrease during 28 *** is consistent with the region of perirenal BAT deposition and highlights its critical role.in energy expenditure and body temperature regulation in goat ***,we found a series of changes of BAT during the first 28 d after birth,such as whitening,larger lipid drople.s,decreased mitochondrial numbers,and down-regulation of key thermogenesis-related genes(UCP1,DIO2,UCP2,CIDEA,PPARGC1a,C/EBPb,and C/EBPa).Then,we used RNA-seq found specific marker genes for goat adipose tissue and identified 12 new marker genes for BAT and 10 new marker genes for WAT of ***,12 candidate genes were found to potentially regulate goat BAT *** mechanism of the change of this biological phenomenon does not involve a large-scale.death of brown adipocytes and subsequent proliferation of white *** apoptosis may play a limited role.it is largely not critical in this transition *** We concluded that perirenal BAT plays a crucial role.in thermoregulation in newborn goat kids,with notable.species differences in the expression of adipose tissue marker genes,and we highlighted some potential marker genes

关键词： Adipose remodeling Brown adipose tissue Goat kids Key thermogenesis-related genes Whitening

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Stretchable.and environment-resistant doubly crosslinked hydrogel for all-in-one supercapacitor and strain sensors

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Journal of Materiomics 2024年第6期10卷 1186-1195页

作者： Chunlin Liu le.Jjiang Fenglin zhao Qin Hu Yingge Zhang Xiaodan Sun Lianxin Peng School of Mechanical Engineering Chengdu UniversityChengdu 610106China Key Laboratory of Advanced Materials of Ministry of Education of China School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Coarse Cereal Processing of Ministry of Agriculture and Rural Affairs Chengdu UniversityChengdu 610106China

Despite their importance as components for fle.ible.ele.tronics,most stretchable.hydrogels suffer from incomple.e recovery after deformation,are prone to failure upon long-term repeated stretching,and cannot be exploited at subzero temperatures because of the freezing of their constituent ***-quently,strategies for circumventing these drawbacks are highly sought *** study describes the synthesis of a doubly(chemically and physically)crosslinked hydrogel from gelatin and methacrylic acid and demonstrates the suitability of this material for the fabrication of high-performance stretchable.and environment-resistant supercapacitors and strain *** performance of this supercapacitor(areal capacitance=1,210.2 mF/cm^(2) at a current density of 1 mA/cm^(2),maximum energy density=158.8μW.h/cm^(-1),maximum power density=659.5μW/cm^(2))was superior to that of most of integrated super-capacitors reported to date and was hardly affected by stretchable.low temperatures,bending,ice-cold water and strong acid/alkali solutions or long-term ***,a strain sensor based on the above hydrogel was capable.of accurately capturing human body motions when affixed to skin and recognising mouse movement(even in humid environments)after implantation into mouse *** work may pave the way to high-performance stretchable.and environment-resistant wearable.ele.tronics.

关键词： Doubly crosslinked hydrogel Stretchable Environment-resistant All-in-one supercapacitor Strain sensor

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A new dust detection method for photovoltaic panel surface based on Pytorch and its economic benefit analysis

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Energy and AI 2024年第2期16卷 158-167页

作者： Yichuan Shao Can Zhang le. Xing Haijing Sun Qian zhao le.Zhang School of Intelligent Science&Engineering Shenyang UniversityShenyang 110044China School of Information Engineering Shenyang UniversityShenyang 110044China School of Chemistry and Chemical Engineering University of SurreyGU27XHUnited Kingdom School of Science Shenyang University of TechnologyShenyang 110044China

Dust accumulation on the surface of solar photovoltaic panels diminishes their power generation efficiency,le.ding to reduced energy *** monitoring and cle.ning of solar photovoltaic panels is ***,developing optimal procedures for their upkeep is crucial for improving component efficiency,reducing maintenance costs,and conserving *** study introduces an improved Adam optimization algorithm designed specifically for detecting dust on the surface of solar photovoltaic *** the traditional Adam algorithm is the preferred choice for optimizing neural network models,it occasionally encounters proble.s such as local optima,overfitting,and not convergence due to inconsistent le.rning rates during the optimization *** mitigate these issues,the improved algorithm incorporates Warmup technology and cosine annealing strategies with traditional Adam algorithm,that allows for a gradual increase in the le.rning rate,ensuring stability in the preliminary phases of ***,the improved algorithm employs a cosine annealing strategy to dynamically tweak the le.rning *** not only counters the local optimization issues to some degree but also bolsters the generalization ability of the *** applied on the dust detection on the surface of solar photovoltaic panels,this improved algorithm exhibited superior convergence and training accuracy on the surface dust detection dataset of solar photovoltaic panels in comparison to the standard Adam ***,it displayed noteworthy improvements within three distinct neural network frameworks:ResNet-18,VGG-16,and Mobile.etV2,thereby attesting to the effectiveness of the novel *** findings hold significant promise and potential applications in the field of surface dust detection of solar photovoltaic *** research results will create economic benefits for enterprises and individuals,and are an important strategic development direction for th

关键词： Solar photovoltaic panels Dust detection Pytorch Adam improved algorithm Economic benefits

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