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The variation in basal channels and basal melt rates of Pine Island Ice Shelf

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Acta Oceanologica Sinica 2024年第1期43卷 22-34页

作者： Mingliang Liu Zemin wang Baojun zhang Xiangyu Song jiachun An Chinese Antarctic Center of Surveying and Mapping Wuhan UniversityWuhan 430079China Key Laboratory of Polar Environment Monitoring and Public Governance(Wuhan University) Ministry of EducationWuhan 430079China School of Civil Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University) Ministry of EducationShijiazhuang 050043China

In recent years,there has been a significant acceleration in the thinning,calving and retreat of the Pine Island Ice Shelf(PIIS).The basal channels,results of enhanced basal melting,have the potential to significantly impact the stability of the *** this study,we used a variety of remote sensing data,including Landsat,REMA DEM,ICESat-1 and ICESat-2 satellite altimetry observations,and Ice Bridge airborne measurements,to study the spatiotemporal changes in the basal channels from 2003 to 2020 and basal melt rate from 2010 to 2017 of the PIIS under the Eulerian *** found that the basal channels are highly developed in the PIIS,with a total length exceeding 450 *** of the basal channels are ocean-sourced or groundingline-sourced basal channels,caused by the rapid melting under the ice shelf or near the groundingline.A raised seabed prevented warm water intrusion into the eastern branch of the PIIS,resulting in a lower basal melt rate in that *** contrast,a deepsea trough facilitates warm seawater into the mainstream and the western branch of the PIIS,resulting in a higher basal melt rate in the main-stream,and the surface elevation changes above the basal channels of the mainstream and western branch are more *** El Ni?o event in 2015–2016 possibly slowed down the basal melting of the PIIS by modulating wind field,surface sea temperature and depth seawater *** and atmospheric changes were driven by El Ni?o,which can further explain and confirm the changes in the basal melting of the PIIS.

关键词： Pine Island Ice Shelf basal channel basal melt rate digital elevation models(DEMs) satellite altimetry

Joint fuzzy background and adaptive foreground model for moving target detection

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Frontiers of Computer Science 2024年第2期18卷 93-106页

作者： dawei zhang Peng wang Yongfeng DONG Linhao LI Xin LI School of Artificial Intelligence Hebei University of TechnologyTianjin 300401China Lane Department of Computer Science and Electrical Engineering West Virginia UniversityMorgantownWV 26506-6109USA

Moving target detection is one of the most basic tasks in computer *** conventional wisdom,the problem is solved by iterative optimization under either Matrix Decomposition(MD)or Matrix Factorization(MF)*** utilizes foreground information to facilitate background *** uses noise-based weights to fine-tune the *** both noise and foreground information contribute to the recovery of the *** jointly exploit their advantages,inspired by two framework complementary characteristics,we propose to simultaneously exploit the advantages of these two optimizing approaches in a unified framework called Joint Matrix Decomposition and Factorization(JMDF).To improve background extraction,a fuzzy factorization is *** fuzzy membership of the background/foreground association is calculated during the factorization process to distinguish their contributions of both to background *** describe the spatio-temporal continuity of foreground more accurately,we propose to incorporate the first order temporal difference into the group sparsity constraint *** temporal constraint is adjusted *** foreground and the background are jointly estimated through an effective alternate optimization process,and the noise can be modeled with the specific probability *** experimental results of vast real videos illustrate the effectiveness of our *** with the current state-of-the-art technology,our method can usually form the clearer background and extract the more accurate ***-noise experiments show the noise robustness of our method.

关键词： matrixdecomposition matrix factorization generalized sparsity noise modeling

Periodic signal extraction of GNSS height time series based on adaptive singular spectrum analysis

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Geodesy and Geodynamics 2024年第1期15卷 50-60页

作者： Chenfeng Li Peibing Yang Tengxu zhang jiachun Guo Three Gorges Geotechnical Engineering Co.Ltd.(Wuhan) Wuhan 430074China College of Resources and Environmental Science and Engineering Hubei University of Science and TechnologyXian©ning 437100China College of Civil Engineering Anhui Jianzhu UniversityHefei 230601China

Singular spectrum analysis is widely used in geodetic time series ***,when extracting time-varying periodic signals from a large number of Global Navigation Satellite System(GNSS)time series,the selection of appropriate embedding window size and principal components makes this method cumbersome and *** improve the efficiency and accuracy of singular spectrum analysis,this paper proposes an adaptive singular spectrum analysis method by combining spectrum analysis with a new trace *** running time and correlation analysis indicate that the proposed method can adaptively set the embedding window size to extract the time-varying periodic signals from GNSS time series,and the extraction efficiency of a single time series is six times that of singular spectrum *** method is also accurate and more suitable for time-varying periodic signal analysis of global GNSS sites.

关键词： GNSS Time series Singular spectrum analysis Trace matrix Periodic signal

Ionization Engineering of Hydrogels Enables Highly Efficient Salt‑Impeded Solar Evaporation and Night‑Time Electricity Harvesting

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Nano-Micro Letters 2024年第1期16卷 131-146页

作者： Nan He Haonan wang Haotian zhang Bo Jiang dawei Tang Lin Li School of Energy and Power Engineering Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of EducationDalian University of TechnologyDalian 116024People’s Republic of China

Interfacial solar evaporation holds immense potential for brine desalination with low carbon footprints and high energy ***,as a tunable material platform from the molecular level to the macroscopic scale,have been considered the most promising candidate for solar ***,the simultaneous achievement of high evaporation efficiency and satisfactory tolerance to salt ions in brine remains a challenging scientific bottleneck,restricting the widespread ***,we report ionization engineering,which endows polymer chains of hydrogels with electronegativity for impeding salt ions and activating water molecules,fundamentally overcoming the hydrogel salt-impeded challenge and dramatically expediting water evaporating in *** sodium dodecyl benzene sulfonate-modified carbon black is chosen as the solar *** hydrogel reaches a ground-breaking evaporation rate of 2.9 kg m−2 h−1 in 20 wt%brine with 95.6%efficiency under one sun irradiation,surpassing most of the reported *** notably,such a hydrogel-based evaporator enables extracting clean water from oversaturated salt solutions and maintains durability under different high-strength deformation or a 15-day continuous ***,on the basis of the cation selectivity induced by the electronegativity,we first propose an all-day system that evaporates during the day and generates salinity-gradient electricity using waste-evaporated brine at night,anticipating pioneer a new opportunity for all-day resource-generating systems in fields of freshwater and electricity.

关键词： Solar evaporation Hydrogel evaporators Salt impeding Ionization engineering Cyclic vapor-electricity generation

Degradation properties of fulvic acid and its microbially driven mechanism from a partial nitritation bioreactor through multi-spectral and bioinformatic analysis

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Journal of Environmental Sciences 2024年第1期135卷 318-331页

作者： Quanhao Dou Li zhang Tingjun Dong Zixuan Song Xuepeng Fan Yongzhen Peng Xiayan wang jiachun Yang National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery EngineeringBeijing University of TechnologyBeijing 100124China Department of Chemistry and Biology Center of Excellence for Environmental Safety and Biological EffectsBeijing Key Laboratory for Green Catalysis and SeparationBeijing University of TechnologyBeijing 100124China Environmental Protection Development Group Co. Ltd.Shandong 250101China

This study employed multispectral techniques to evaluate fulvic acid(FA)compositional characteristic and elucidate its biodegradation mechanisms during partial nitritation(PN)*** showed that FA removal efficiency(FRE)decreased from 90.22 to 23.11%when FA concentrations in the reactor were increased from 0 to 162.30 mg/L,and that molecular size,degree of aromatization and humification of the effluent FA macromolecules all increased after *** population analysis indicated that the proliferation of the Comamonas,OLB12 and Thauera exhibit high FA utilization capacity in lower concentrations(<50.59 mg/L),promoting the degradation and removal of macromolecular *** addition,the sustained increase in external FA may decrease the abundance of above functional microorganisms,resulting in a rapid drop in ***,from the genetic perspective,the elevated FA levels restricted carbohydrate(ko00620,ko00010 and ko00020)and nitrogen(HAO,AMO,NIR and NOR)metabolism-related pathways,thereby impeding FA removal and total nitrogen loss associated with N_(2)O emissions.

关键词： Partial nitritation Fulvic acid 3DEEM-PARAFAC UV/Vis Microbially driven mechanism

Deformation characteristics and analog modeling of transtensional structures in the Dongying Sag,Bohai Bay Basin

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Frontiers of Earth Science 2024年第1期18卷 227-241页

作者： dawei DONG Li ZHAO Weizhong zhang Jiyan LI Ruixiang zhang Jianlei YANG Guangzeng wang Shandong Institute of Petroleum and Chemical Technology Dongying 257061China College of Resources and Environment Shandong Agriculture UniversityTai᾽an 271018China Geophysical Research Institute of Shengli Oilfield Branch Company SINOPECDongying 257022China Research Institute of Petroleum Exploration&Development Shengli Oilfield CompanySINOPECDongying 257000China College of Marine Geosciences Ocean University of ChinaQingdao 266100China

Hydrocarbon exploration in the Dongying Sag is constrained by the development of many Cenozoic transtensional structures with complex patterns and dynamic *** study uses seismic interpretation and analog modeling to investigate these transtensional *** results include dividing these transtensional structures into boundary fault,oblique rifting,and deep strike-slip fault controlled structures,according to the relationships between main and secondary *** developed in the steep slope zone,the central sag zone,and the slope zone,*** profile,the transtensional structures formed appear to be semi-flower-like,step-like,or *** plan-view,they appear to be broom-like,soft-linked,or en-echelon ***,these transtensional structures are controlled by the oblique normal slip of boundary faults,by the oblique extension of sub-sags,and by the later extension of deep strike-slip *** geometric deformation of these transtensional structures is controlled by the angles between the regional extension direction and the strike of boundary faults,deep faults,or sub-sags,where a larger angle corresponds to less developed transtensional ***,the transtensional structures in the Dongying Sag were created by multi-phase and multi-directional extensions in the Cenozoic—which is also controlled by pre-existing *** strike of newborn secondary faults was determined by the regional extension direction and pre-existing structures.

关键词： transtensional structure seismic interpretation analogue modeling dynamic mechanism Dongying Sag

A hybrid RNA-protein biosensor for high-throughput screening of adenosylcobalamin biosynthesis

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Synthetic and Systems Biotechnology 2024年第3期9卷 513-521页

作者： Xia Yang Huiying wang Dongqin Ding Huan Fang Huina Dong dawei zhang College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichangHubei443002China Tianjin Institute of Industrial Biotechnology Chinese Academy of SciencesTianjin300308China Key Laboratory of Engineering Biology for Low-Carbon Manufacturing Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin300308China University of Chinese Academy of Sciences Beijing100049China

Genetically encoded circuits have been successfully utilized to assess and characterize target variants with desirable traits from large mutant *** is an essential coenzyme that is required in many intracellular physiological reactions and is widely used in the pharmaceutical and food ***-throughput screening techniques capable of detecting adenosylcobalamin productivity and selecting superior adenosylcobalamin biosynthesis strains are critical for the creation of an effective microbial cell factory for the production of adenosylcobalamin at an industrial *** this study,we developed an RNA-protein hybrid biosensor whose input part was an endogenous RNA riboswitch to specifically respond to adenosylcobalamin,the inverter part was an orthogonal transcriptional repressor to obtain signal inversion,and the output part was a fluorescent protein to be easily *** hybrid biosensor could specifically and positively correlate adenosylcobalamin concentrations to green fluorescent protein expression levels in *** study also improved the operating concentration and dynamic range of the hybrid biosensor by systematic *** individual cell harboring the hybrid biosensor presented over 20-fold higher fluorescence intensity than the negative ***,using such a biosensor combined with fluorescence-activated cell sorting,we established a high-throughput screening platform for screening adenosylcobalamin *** study demonstrates that this platform has significant potential to quickly isolate high-productive strains to meet industrial demand and that the framework is acceptable for various metabolites.

关键词： Adenosylcobalamin Genetically encoded biosensor Riboswitch Transcriptional repressor High-throughput screening

Experimental Study of Electrical‑Assisted Nanomachining of Monocrystalline Copper Using Customized Tungsten Tip

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Nanomanufacturing and Metrology 2024年第2期7卷 60-75页

作者： Tao wang Yanling Tian Zhilai Lu Weijie wang Zhao zhang Guangwei Zhu Hui Tang dawei zhang Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin UniversityTianjin 300072China School of Engineering University of WarwickCoventry CV47ALUK State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006China

As a promising micro/nanofabrication method,electrical-assisted nanomachining has obtained substantial attention due to its high material removal rate and attainable superior surface *** this study,a rectangular wave electrical signal was applied for nanomachining by a customized tungsten *** to the coupling effect between the electric field and mechanical force,the cutting depth of the machined grooves can be *** electrical-assisted groove processing,a depth of 270 nm and an aspect ratio of 0.6 on the copper sample can be *** influence of operation parameters including applied voltage,frequency,duty ratio,normal force and cutting speed on the machining performance was investigated in terms of the groove depth,width,aspect ratio,and surface *** potential machining mechanisms should be a combination of electric field force,nanoscale electric discharge,electric contact thermal effects,possible annealing behavior,and scraping and plowing actions induced by mechanical forces.

关键词： Tip-based nanofabrication Electrical-assisted machining Nanoscale scratching Machining parameters

Advances of embedded resistive random access memory in industrial manufacturing and its potential applications

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International Journal of Extreme Manufacturing 2024年第3期6卷 175-214页

作者： Zijian wang Yixian Song Guobin zhang Qi Luo Kai Xu dawei Gao Bin Yu Desmond Loke Shuai Zhong Yishu zhang College of Integrated Circuits Zhejiang UniversityHangzhouZhejiang 3112000People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 310027People’s Republic of China Department of Science Mathematics and TechnologySingapore University of Technology and DesignSingapore 487372Singapore Guangdong Institute of Intelligence Science and Technology HengqinZhuhai 519031People’s Republic of China

Embedded memory,which heavily relies on the manufacturing process,has been widely adopted in various industrial *** the field of embedded memory continues to evolve,innovative strategies are emerging to enhance *** them,resistive random access memory(RRAM)has gained significant attention due to its numerousadvantages over traditional memory devices,including high speed(<1 ns),high density(4 F^(2)·n^(-1)),high scalability(~nm),and low power consumption(~pJ).This review focuses on the recent progress of embedded RRAM in industrial manufacturing and its *** provides a brief introduction to the concepts and advantages of RRAM,discusses the key factors that impact its industrial manufacturing,and presents the commercial progress driven by cutting-edge nanotechnology,which has been pursued by manysemiconductor ***,it highlights the adoption of embedded RRAM in emerging applications within the realm of the Internet of Things and future intelligent computing,with a particular emphasis on its role in neuromorphic ***,the review discusses thecurrent challenges and provides insights into the prospects of embedded RRAM in the era of big data and artificial intelligence.

关键词： embedded resistive random access memory industrial manufacturing intelligent computing advanced process node