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Refining aquifer heterogeneity and understanding groundwater recharge sources in an intensively exploited agrarian dominated region of the Ganga Plain

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Geoscience Frontiers 2024年第4期15卷 134-147页

作者： Abhinav Patel Shive Prakash Rai Nijesh Puthiyottil Abhinesh Kumar Singh Jacob Noble Rajesh Singh Dharmappa Hagare u.D.Saravana Kumar Nachiketa Rai Kossitse Venyo Akpataku Department of Geology Institute of ScienceBanaras Hindu UniversityVaranasiUttar Pradesh 221005India Isotope and Radiation Application Division Bhabha Atomic Research CentreTrombayMumbai 400085India Environmental Hydrology Division National Institute of HydrologyRoorkeeUttarakhand 247667India School of Engineering Design and Built EnvironmentWestern Sydney UniversityAustralia Isotope Hydrology Section Division of Physical and Chemical SciencesInternational Atomic Energy Agency(IAEA)ViennaAustria Department of Earth Sciences Indian Institute of TechnologyRoorkeeUttarakhand 247667India Laboratory of Organic Chemistry and Environmental Science Department of ChemistryUniversity of KaraPO Box 404KaraTogo

Densely populated region of Ganga Plain is facing aquifer vulnerability through waterborne pollutants and groundwater stress due to indiscriminate abstraction,causing environmental and socio-economic *** address long-term groundwater resilience,it is crucial to understand aquifer heterogeneity and connectivity,groundwater recharge sources,effects of groundwater abstraction *** this con-text,present study aims to understand factors responsible for vertical and spatial variability of groundwater chemistry and to identify groundwater recharge sources in an intensively exploited agrarian region of the Ganga *** of chemometric,statistical,and isotopic analysis categorises the alluvial aquifer into zone 1(G1;ground surface to 100 m)and zone 2(G2;>100 m-210 m).The group G1 samples are characterized by a wide variation in hydrochemical species,noted with pockets of F-and NO3-rich groundwater,and fresh to more evolved water types,while group G2 groundwater is characterized by a sharp increase in freshwater types and limited variation in their isotopic and hydrochemical *** G1 groundwater chemistry is governed by soil mineralogy,local anthropogenic inputs(SO42-,Cl-,and NO3-),and manifested by multiple recharge sources(local precipitation,river,canal water,pond).The G2 group is dominated by geogenic processes and mainly recharged by the local *** signatures confirm more evolved water type for group G1 in northwestern region,while fresh-water type covers the rest of the study *** rich groundwater is attributed to sodic water under alkaline conditions and enrichedδ18O values emphasizing role of evaporation in F-mobilization from micas and amphiboles abundant in the *** findings provide insight into potential groundwater vulnerability towards inorganic contaminants,and ground water recharge *** outcome of this study will help to develop aquifer resilience towards indiscriminate groundwater extrac

关键词： Stable isotopes Hydrogeochemical attributes Groundwater recharge sources Ganga Plain

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miniSCIDOm: a scintillator-based tomograph for volumetric dose reconstruction of single laser-driven proton bunches

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High Power Laser Science and Engineering 2024年第2期12卷 41-50页

作者： A.Corvino m.Reimold E.Beyreuther F.-E.Brack F.Kroll J.Pawelke J.D.Schilz m.Schneider u.Schramm m.E.P.umlandt K.Zeil T.Ziegler J.metzkes-Ng Helmholtz-Zentrum Dresden–Rossendorf DresdenGermany Technische universität Dresden DresdenGermany OncoRay–National Center for Radiation Research in Oncology Faculty of Medicine and University Hospital Carl Gustav CarusTUD Dresden University of TechnologyHelmholtz-Zentrum Dresden–RossendorfDresdenGermany Current affiliation:Institut Curie UniversitéPSLCNRS UMR3347OrsayFrance Current affiliation:universitätsklinikum Freiburg FreiburgGermany

Laser plasma accelerators(LPAs)enable the generation of intense and short proton bunches on a micrometre scale,thus offering new experimental capabilities to research fields such as ultra-high dose rate radiobiology or material *** spectrally broadband,laser-accelerated proton bunches allow for tailored volumetric dose deposition in a sample via single bunches to excite or probe specific sample *** rising number of such experiments indicates a need for diagnostics providing spatially resolved characterization of dose distributions with volumes of approximately 1 cm^(3) for single proton bunches to allow for fast online *** we present the scintillator-based miniSCIDOm detector for online single-bunch tomographic reconstruction of dose distributions in volumes of up to approximately 1 cm^(3).The detector achieves a spatial resolution below 500μm and a sensitivity of 100 *** detector performance is tested at a proton therapy cyclotron and an LPA proton *** experiments’primary focus is the characterization of the scintillator’s ionization quenching behaviour.

关键词： beam monitoring detectors laser-driven proton beams scintillator-based diagnostics ultra-high dose rate

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多孔玻璃微锥阵列超快激光加工工艺研究(特邀)

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中国激光 2024年第4期51卷 334-343页

作者：陆子杰罗国虎王岱荪张开朱康武胡永祥上海交通大学机械与动力工程学院上海200240 上海航天控制技术研究所上海201109

采用脉宽为8 ps的超快激光器,结合高速相机原位观测,研究了超快激光作用G5级多孔玻璃过程中的材料去除行为。研究结果表明:在超快激光作用下,多孔玻璃材料出现剥离去除现象,加工过程中有大量粒径为几十微米的颗粒飞溅,材料去除效率约为K... 详细信息

采用脉宽为8 ps的超快激光器,结合高速相机原位观测,研究了超快激光作用G5级多孔玻璃过程中的材料去除行为。研究结果表明:在超快激光作用下,多孔玻璃材料出现剥离去除现象,加工过程中有大量粒径为几十微米的颗粒飞溅,材料去除效率约为K9玻璃的16.2倍。分析了扫描策略和加工余量对多孔玻璃微锥阵列形貌特征的影响,实现了高一致性和大锥顶锐度微锥阵列加工,平均锥顶尺寸达到20μm。组装后的电喷雾推力器能够在3 kV电压下获得单个发射极90μN的推力。

关键词：激光技术多孔玻璃超快激光微锥阵列电喷雾发射极

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Influence of Different Velocities on muzzle Flow Field

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Transactions of Nanjing university of Aeronautics and Astronautics 2019年第1期36卷 88-97页

作者： LI zijie WANG Hao School of Energy and Power Engineering Nanjing University of Science and Technology

A two?dimensional axisymmetric numerical simulation was successfully carried out on the muzzle flow field of a 300 mm?caliber counter?mass propelling gun. Based on the FLuENT software,using the finite volume method(FVm)and the realizable k?ε turbulence model,we adopted the holistic movement of a partitioned mesh processing method coupled with the intermediate ballistic model and the six degree?of?freedom model(6?DOF). We compared the flow field characteristics at the velocity of 1 730.4,978.3,and 323.4 m/s. The results indicate that the pressure of the hypersonic initial flow field is much higher than that of the subsonic and supersonic initial flow fields. In the case of the subsonic(323.4 m/s)flow field,the tiny disturbance spreads throughout the whole domain. But in the cases of the supersonic(978.3 m/s) and the hypersonic(1 730.4 m/s) flow fields,it cannot spread to the upstream disturbance source,and the disturbance domain of the supersonic flow field is wider than that of the hypersonic. It is noted that the subsonic flow field has a rounded shock wave before the projectile. However,in the supersonic and hypersonic flow fields,a shear layer is formed which begins from the head of the projectile and extends outward from the side of the projectile. Then a multi?layer shock wave is formed composed of coronal shock waves,bottom shock waves,reflected shock waves,and mach disk.

关键词： muzzle flow field different velocities dynamic mesh two-dimensional axisymmetric

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引发全尾砂料浆触变特征的临界粒径研究

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中国有色金属学报 2024年第3期34卷 970-983页

作者：杨柳华李金仓焦华喆尹升华寇云鹏洪紫杰河南理工大学土木工程学院焦作454000 河南理工大学河南省地下工程与灾变防控重点实验室焦作454000 北京科技大学土木与资源工程学院北京100083 山东黄金集团有限公司充填工程实验室莱州261441

细粒径尾砂颗粒絮凝−分解是充填料浆产生触变性的根本原因,然而目前对引发充填料浆触变性的临界粒径研究极少。通过对不同粒径尾砂制备的充填料浆开展触变试验与微观结构的演化测试,结合Patwardhan提出的非牛顿流体理论分析尾砂颗粒间... 详细信息

细粒径尾砂颗粒絮凝−分解是充填料浆产生触变性的根本原因,然而目前对引发充填料浆触变性的临界粒径研究极少。通过对不同粒径尾砂制备的充填料浆开展触变试验与微观结构的演化测试,结合Patwardhan提出的非牛顿流体理论分析尾砂颗粒间相互作用力,推导引发全尾砂料浆触变性能临界粒径的理论值,最终建立了充填料浆触变性模型。结果表明:充填料浆触变性能与剪切速率、质量分数、尾砂细颗粒含量呈正相关,通过理论推导得出引发充填料浆触变性能的临界值为45μm。由此可以认为,当充填料浆中含有粒径m颗粒,且质量分数≥6%时,充填浆料则具有触变效应;反之,充填浆料则不具备触变性。基于实验结果采用Hattori−Lzumi理论构建触变性模型,并结合流变测试结果拟合得到了充填料浆触变性系数。

关键词：充填料浆触变特征临界粒径触变性模型

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Battery health management-a perspective of design,optimization,manufacturing,fault detection,and recycling

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Energy Storage and Saving 2024年第3期3卷 190-208页

作者： Pavel m.Roy Harsh H.Sawant Pratik P.Shelar Prashil u.Sarode S.H.Gawande Industrial Tribology Laboratory Department of Mechanical EngineeringM.E.S.College of EngineeringSavitribai Phule Pune UniversityPune411007India

This paper explores the key aspects of battery technology,focusing on lithium-ion,lead-acid,and nickel metal hydride(NimH)*** delves into manufacturing processes and highlighting their significance in optimizing battery *** addition,the study investigates battery fault detection,emphasizing the importance of early diagnosis using artificial intellignece(AI)and machine learning(mL)*** paper also addresses battery recycling techniques,discussing methods such as pyrometallurgy,hydrometallurgy,mechanical separation,and electrodialysis,considering their environmental *** comprehensive analysis sheds light on the evolution of battery technology and its role in sustainable energy systems.

关键词： Battery health manufacturing Fault detection Recycling

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新元煤矿富水区广域电磁法精细探测

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地球物理学进展 2024年第1期39卷 174-182页

作者：李帝铨王中乐刘子杰刘中元刘最亮张新有色金属成矿预测与地质环境监测教育部重点实验室(中南大学) 长沙410083 有色资源与地质灾害探测湖南省重点实验室长沙410083 中南大学地球科学与信息物理学院长沙410083 华阳新材料科技集团有限公司阳泉045000

长期以来,矿井水害是煤矿开采的重大安全隐患之一,严重威胁着煤矿的安全高效生产,防止突水事故的发生已成为煤矿亟待解决的重要问题.因此利用新技术、新方法开展煤矿富水区精细探测具有重大意义.本文采用大功率广域电磁法,以高频率密度... 详细信息

长期以来,矿井水害是煤矿开采的重大安全隐患之一,严重威胁着煤矿的安全高效生产,防止突水事故的发生已成为煤矿亟待解决的重要问题.因此利用新技术、新方法开展煤矿富水区精细探测具有重大意义.本文采用大功率广域电磁法,以高频率密度、多频同步收发技术对新元煤矿六采区3 km^(2)范围内进行了面积性勘探工作.通过对实测数据的处理与反演,获得了1200 m深度范围内的电性结构,并对主要目的层位进行了划分,识别断裂8条、富水异常区6处,最后通过巷道钻探验证了探测方法的有效性.该工作说明了广域电磁法可以实现煤矿富水区的精细探测,为矿区后续安全生产提供了可靠依据.

关键词：煤矿富水区广域电磁法精细探测

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Prediction of stable high-pressure structures of tantalum nitride TaN2

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Journal of materials Science & Technology 2019年第10期35卷 2297-2304页

作者： Wandong Xing zijie Wei Rong Yu Fanyan meng Department of Physics University of Science and Technology BeijingBeijing Engineering Research Center of Detection and Application for Weak Magnetic FieldBeijing100083China School of Automation University of Science and Technology BeijingBeijing100083China National Center for Electron microscopy in Beijing School of Materials Science and EngineeringKey Laboratory of Advanced Materials of Ministry of Education of ChinaState Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijing100084China

Structure searches based on a combination of first-principles calculations and a particle swarm optimization technique unravel two new stable high-pressure structures(C2/m and Cmce) for Ta N2. The structural features, mechanical properties, formation enthalpies, electronic structure, and phase diagram of Ta N2 are fully investigated. Being mechanically and dynamically stable, the two phases could be made metastable experimentally at ambient conditions.

关键词： Particle swarm optimization First-principles Tantalum nitride Crystal structure High pressure

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The role of N-glycosylation in cancer

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1098-1110页

作者： Yu Lin David m.Lubman Department of Surgery University of Michigan Medical CenterAnn ArborMI 48109USA

Despite advances in understanding the development and progression of cancer in recent years,there remains a lack of comprehensive characterization of the cancer *** play an important role in medicine and are involved in various human disease conditions including ***-moieties participate in fundamental cancer processes like cell signaling,invasion,angiogenesis,and *** N-glycosylation significantly impacts cancer processes and targeted therapies in ***,understanding N-glycosylation in a tumor is essential for comprehending disease progression and discovering anti-cancer targets and biomarkers for therapy monitoring and *** review presents the fundamental process of protein N-glycosylation and summarizes glycosylation changes in tumor cells,including increased terminal sialylation,N-glycan branching,and ***,the role of N-glycosylation in tumor signaling pathways,migration,and metabolism are *** and glycopeptides as potential biomarkers for early detection of cancer based on site specificity have been ***,understanding and exploring the cancer glycoproteome,along with its role in medicine,implication in cancer and other human diseases,highlights the significance of N-glycosylation in tumor processes,necessitating further research for potential anticancer targets and biomarkers.

关键词： N-Glycosylated proteins Cancer signaling Cancer angiogenesis Cancer metabolism Cancer biomarkers

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江西省兴国县矿山生态修复对生态系统服务影响研究

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中国矿业 2024年第6期33卷 120-128页

作者：程子捷陈志纪超黄伟平佘源江西省地质局地理信息工程大队江西南昌330001

本文以兴国县和兴国县矿山生态修复区为研究对象,基于GIS空间分析技术,建立生态系统服务物质量评估模型,评估兴国县和兴国县矿山生态修复区2019年和2021年生态系统服务物质量,探讨矿山修复区修复前后土地利用类型变化对生态系统服务的... 详细信息

本文以兴国县和兴国县矿山生态修复区为研究对象,基于GIS空间分析技术,建立生态系统服务物质量评估模型,评估兴国县和兴国县矿山生态修复区2019年和2021年生态系统服务物质量,探讨矿山修复区修复前后土地利用类型变化对生态系统服务的影响。研究结果显示:兴国县2021年五项生态系统服务较2019年有所下降;从空间分布上看,粮食生产服务分布广泛,高低值分布较为零散,水源涵养服务高值集中于兴国县北部和东北部,土壤保持服务高值较少,分布于兴国县中南部,固碳服务与释氧服务高值则集中于兴国县中部;兴国县矿山生态修复区修复后采矿用地转为耕地与林地,区域内粮食生产量增加了6.17 t,固碳量增加了246992.43 t·C,释氧量增加了187892.85 t·O_(2),土壤保持量增加了5.79 t,水源涵养量减少了3.913×10^(7)m^(3)。研究表明矿山生态修复区的生态修复工程很大程度上导致了土地利用现状发生变化,从而影响区域内的生态环境。耕地、林地对区域生态系统服务贡献显著。

关键词：矿区生态修复生态系统服务土地利用变化固碳

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