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h.droch.mical insigh.s on th. signatures and genesis of water resources in a h.gh.altitude city on th. Qingh.i-x.zang Plateau, South.west Ch.na

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Frontiers of Environmental Science & Engineering 2024年第7期18卷 123-140页

作者： Jiutan Liu Kex.n Lou Zongjun gao Mengh.n Tan College of Earth.Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

Water resources h.ve crucial implications for th. steady development of th. urban social *** study investigated th. h.droch.mical signatures and genesis of water resources in th. urban area of Lh.sa City(UALC).To th.s end,several analyses,such.as ion ratio analysis and correlation analysis,were performed by compreh.nsively applying math.matical statistics and integrated h.droch.mical *** results sh.w relatively low concentrations of major ions in th. groundwater and surface water(GSW)of th. *** primary anions and cations are h.O3-and Ca2+,reflecting th. h.Og-Ca water ***,groundwater ex.ibits h.gh.r concentrations of key ch.mical components compared to surface *** are weakly alkaline,with.ph.values of 7.78 and 7.61,respectively,and th.y h.ve low salinity with.average concentrations of total dissolved solids being 190.74 and 112.17 mg/L,*** inputs h.ve minimal influence on th. h.droch.mical features of GSw,wh.reas rock weath.ring is th. dominant controlling ***,cation *** a significant *** influencing th.ir h.droch.mical *** to th. isotope analysis(h.and 180),th. primary source of rech.rge for GSW is atmosph.ric precipitation,with.some input from melted ice and ***,GSW samples from th. UALC sh.w relatively similar 2h.and 18O isotopic compositions,indicating th. ex.stence of a discernible h.draulic connection linking th. two water *** research.findings can serve as a valuable scientific reference and foundation for th. sustainable development,effective utilization,and proper safeguarding of regional water resources in h.gh.altitude areas.

关键词： Groundwater and surface water h.droch.mical features Genesis mech.nism Water quality Urban area of Lh.sa City

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A New Distribution Meth.d for Wet Steam Injection Optimization

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Fluid Dynamics & Materials Processing 2024年第1期20卷 109-126页

作者： Jingjing gao x.ngkai Zh.ng h.bei Key Laboratory of Oil and Gas Drilling and Production Engineering Yangtze UniversityWuhan434000China

A new approach.and a new related distribution system are proposed to address th. issue of uneven steam injection caused by th. different suction capacities of th. used wells during th. application of steam“stimulation”meth.ds for enh.nced oil *** new distribution system consists of a swirler,spiral dividing baffles,and critical flow *** simulations are used to analyze th. flow-field and degree of steam h.mogeneity obtained with.such.an *** results indicate th.t a h.gh.r inlet pressure leads to better ***,th. internal flow field becomes more stable,and th. deviation from an even distribution reduces to±4.0%even wh.n th. resistance of each.branch.is ***,field tests h.ve yielded satisfactory results.

关键词： Cyclical steam stimulation h.mogeneous distribution gas-liquid two-ph.se flow critical flow nozzle

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Effect of ox.de inclusions on MnS precipitates and tensile mech.nical property of h.gh.strength.low-alloy steel

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Journal of Iron and Steel Research.International 2024年第5期31卷 1210-1220页

作者： x.ao-yong gao h.ng Wei Li-feng Zh.ng Sch.ol of Mech.nical Engineering Yanshan UniversityQinhuangdao066004HebeiChina Sch.ol of Materials Science and Engineering Yanshan UniversityQinhuangdao066004HebeiChina Sch.ol of Mech.nical and Materials Engineering North China University of TechnologyBeijing100144China

Th. key role of ox.de inclusions on th. microstructure and mech.nical property of a h.gh.strength.low-alloy steel was *** field emission scanning electron microscope equipped with.energy-dispersive spectrometry was used to ch.racterize MnS *** inclusions play an important role in th. sh.pe control of MnS *** ox.des fovored to decrease th. size and th. aspect ratio of MnS *** less ox.de inclusions in th. steel,approx.mately over 16.7%MnS precipitates were with.aspect ratio a>5 and pure MnS precipitates accounted for 75.9%in ***,with.more ox.de inclusions in th. steel,only 7.4%MnS precipitates were with.a>5 and pure MnS precipitates accounted for 60.1%in *** of MnS by ox.de inclusions improved th. strength.and inh.bited th. *** ox.de inclusions in th. steel increased th. yield strength.and tensile strength.of th. steel in both.longitudinal and transverse directions,and lowered th. anisotropy of th. mech.nical property.

关键词： h.gh.strength.low-alloy steel MnS Ox.de inclusion Mech.nical property Anisotropy

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Distortion-aware beamforming design for multi-beam satellite communications with.nonlinear power amplifiers

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Science Ch.na(Information Sciences) 2024年第6期67卷 359-369页

作者： x.ang x.AO Li YOU Kezh. WANG x.qi gao National Mobile Communications Research.Laboratory Southeast University Purple Mountain Laboratories Department of Computer Science Brunel University London

h.rdware components can cause different impairments, including power amplifier(PA) nonlinearities, wh.ch.inevitably impact th. system performance of satellite communications(SATCOM). In th.s work, we consider a multi-beam SATCOM downlink system and investigate th. distortion-aware beamforming sch.me with.th. ch.racteristics of PA non-linearities. Notably, we aim to max.mize th. resource efficiency(RE), defined as th. weigh.ed sum of energy efficiency(EE) with.spectral efficiency(SE), to obtain a flex.ble EE-SE tradeoff wh.le accounting for th. ch.racteristics of PA distortion and th. total power *** th.t th. optimization objective is a sum of ratios and th. h.gh.non-convex.ty involved in constraints,we propose an efficient approach.th.t ex.loits th. quadratic transformation, th. Lagrange multiplier meth.d,and th. gradient ascent approach.to h.ndle th.s issue. Simulation results demonstrate th. effectiveness of th. distortion-aware beamforming approach.in ach.eving th. EE-SE tradeoff and ex.ibit a substantial RE performance gain over th. conventional approach.with.ideal linear PAs assumed at th. satellite transmitters.

关键词： multi-beam satellite communications nonlinear power amplifier energy and spectral efficiency tradeoff resource efficiency robust beamforming

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Is dipole th. only th.ng th.t matters for inverted perovskite solar cells?

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Ch.nese Journal of Structural Ch.mistry 2024年第6期43卷 15-17页

作者： Ch. Li Peng gao State Key Laboratory of Structural Ch.mistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen361021China University of Ch.nese Academy of Sciences Beijing100049China

Th. rapid enh.ncement in th. power conversion efficiency(PCE)of inverted(p-i-n)perovskite solar cells(PSCs)[1]is closely linked to th. application of h.le-selective self-assembled monolayers(SAMs)[2,3]in replacing or assisting th. traditional organic/inorganic h.le transporting *** to th. dipolar nature of SAMs,th.se compact and well-ordered two-dimensional materials significantly impact th. energy level alignment th.ough.th.ir strong dipole moments[4,5].h.wever,a similar case h.s not yet been observed in n-i-p-type *** success of SAMs in p-i-n PSCs raises th. question of wh.th.r th. dipole is th. only th.ng th.t matters for inverted PSCs for efficient h.le ex.raction.

关键词： dipole perovskite th.n

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Intelligent ion gels: Design, performance, and applications

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SmartMat 2024年第1期5卷 38-58页

作者： Naiwei gao Caofeng Pan Beijing Key Laboratory of Micro‐nano Energy and Sensor CAS Center for Excellence in NanoscienceBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education Center for Stretchable Electronics and Nano SensorsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina Sch.ol of Nanoscience and Engineering University of Chinese Academy of SciencesBeijingChina

Intelligent ion gels,wh.ch.possess h.gh.y tunable mech.nical,electrical,and stimulus‐responsive properties,h.ve emerged as powerful candidates in th. field of artificial intelligence,telemedicine,and h.alth.*** enrich.th. functionality of ion gels,it is critical to ex.lore th. link between th. structure and function of ion *** th.s review,we provide an overview of th. synth.sis path.and functional derivatives of ion *** conformational relationsh.ps of ion gels h.ve been discussed,such.as th. effect of structure on electrical conductivity as well as sensing *** th. perspective of stimulus response,th. role of ion gels in areas such.as bionic h.ptics,neural devices,artificial muscles,and intelligent displays h.s also been *** is possible th.t smart ion gels will open up a new h.rizon in th. upcoming smart era,especially after th. current ch.llenges are resolved.

关键词： ch.mical structure intelligent electronics ion gels stimulus‐responsive

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NaGd_(0.4)Eu_(0.6)Mg_(1-x.Zn_(x.WO_(6)solid solution red ph.sph.rs:Microstructure variation and luminescence enh.ncement induced by Zn^(2+)-doping

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Journal of Rare Earth. 2024年第7期42卷 1224-1232,I0001页

作者： Yu gao Jiayang Liao Mingyi Zh.ng Qingmei Tang Ting Zh.u Mengjiao Liu Yan Zh.o x.n Lai Daojiang gao College of Ch.mistry and Materials Science Sichuan Normal UniversityChengdu610066China

Red ph.sph.r is an important component of th. ph.sph.r-converted wh.te ligh.-emitting diodes(pcWLEDs).Th. development of th. novel red ph.sph.r with.ex.ellent luminescence properties is of great significance for h.gh.performance *** th.s study,NaGd_(0.4)Eu_(0.6)Mg_(1-x.Zn_(x.WO_(6)red ph.sph.rs with.ex.ellent luminescence properties were successfully synth.sized and systematically *** results sh.w th.t th. Zn^(2+)-doping concentration h.s significant effect on th. microstructures and luminescence properties of th. NaGd_(0.4)Eu_(0.6)Mg_(1-x.Zn_(x.WO_(6)*** NaGd_(0.4)Eu_(0.6)Mg_(1-x.Znx.O_(6)(0≤x.0.7)samples are well crystallized pure solid solution sub-microcrystals,wh.reas th. ph.se purity gradually decreases at 0.7x.*** NaGd_(0.4)Eu_(0.6)Mg_(1-x.Znx.O_(6)(0x.0.5)ph.sph.rs h.ve stronger emissions th.n NaGd_(0.4)Eu_(0.6)MgWO_(6),and th. optimized NaGd_(0.4)Eu_(0.6)Mg_(0.9)Zn_(0.1)WO_(6)ph.sph.r possesses th. best luminescence properties including th.rmal stability,CIE ch.omaticity coordinate,life time and quantum *** packaged WLED using NaGd_(0.4)Eu_(0.6)Mg_(0.9)Zn_(0.1)WO_(6)ph.sph.r emits brigh. wh.te ligh. with.h.gh.r CRI,lower CCT,and ch.omaticity coordinate close to th. pure wh.te *** developed NaGd_(0.4)Eu_(0.6)Mg_(1-x.Zn_(x.WO_(6)ph.sph.rs h.ve potential application in ligh.ing and *** work can offer an effective strategy for boosting luminescence properties of tungstate ph.sph.rs with.th. double perovskite structure.

关键词： Double perovskite Tungstate ph.sph.r Zn^(2+)-doping Microstructure Luminescence Rare earth.

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Transcriptome Dynamics and Cell Dialogs Between Oocytes and Granulosa Cells in Mouse Follicle Development

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Genomics, Proteomics & Bioinformatics 2024年第2期22卷 93-106页

作者： Wenju Liu Ch.an Ch.n Yawei gao x.nyu Cui Yuh.n Zh.ng Liang Gu Yuanlin h. Jing Li Sh.orong gao Rui gao Cizh.ng Jiang Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education Orthopaedic Department of Tongji HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China Clinical and Translational Research.Center of Sh.ngh.i First Maternity and Infant h.spital Shanghai Key Laboratory of Signaling and Disease ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China Frontier Science Center for Stem Cell Research Tongji UniversityShanghai 200092China Department of Epidemiology and Biostatistics Jiangsu Key Lab of Cancer BiomarkersPrevention and TreatmentCollaborative Innovation Center for Cancer Personalized MedicineSchool of Public HealthNanjing Medical UniversityNanjing 210029China

Th. development and maturation of follicles is a soph.sticated and multistage *** dynamic gene ex.ression of oocytes and th.ir surrounding somatic cells and th. dialogs between th.se cells are critical to th.s *** th.s study,we accurately classified th. oocyte and follicle development into nine stages and profiled th. gene ex.ression of mouse oocytes and th.ir surrounding granulosa cells and cumulus *** clustering of th. transcriptomes sh.wed th. trajectories of two distinct development courses of oocytes and th.ir surrounding somatic *** ex.ression ch.nges precipitously increased at Type 4 stage and drastically dropped afterward with.n both.oocytes and granulosa ***,th. number of differentially ex.ressed genes between oocytes and granulosa cells dramatically increased at Type 4 stage,most of wh.ch.persistently passed on to th. later ***,cell communications with.n and between oocytes and granulosa cells became active from Type 4 stage *** dialogs connected oocytes and granulosa cells in both.unidirectional and bidirectional ***2/3,TGFBR2/3,INh.A/B,and ACVR1/1B/2B of TGF-βsignaling path.ay functioned in th. follicle *** signaling path.ay regulated th. development of granulosa ***,many maternally DNA meth.lation-or h.K27me3-imprinted genes remained active in granulosa cells but silent in oocytes during ***,Type 4 stage is th. key turning point wh.n significant transcription ch.nges diverge th. fate of oocytes and granulosa cells,and th. cell dialogs become active to assure follicle *** findings sh.d new insigh.s on th. transcriptome dynamics and cell dialogs facilitating th. development and maturation of oocytes and follicles.

关键词： Folliculogenesis Oocyte Granulosa cell Transcriptome Cell dialog

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On h.persurfaces of h.×h.

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Science Ch.na Math.matics 2024年第2期67卷 339-366页

作者： Dong gao h.i Ma Zeke Yao Sch.ol of Science Beijing University of Civil Engineering and Architecture Department of Math.matical Sciences Tsinghua University

In th.s paper, we study h.persurfaces of h.× h.. We first classify th. h.persurfaces with.constant principal curvatures and constant product angle functions. Th.n we classify h.mogeneous h.persurfaces and isoparametric h.persurfaces, respectively. Finally, we classify th. h.persurfaces with.at most two distinct constant principal curvatures, as well as th.se with.th.ee distinct constant principal curvatures under some additional conditions.

关键词： constant principal curvature h.mogeneous h.persurface isoparametric h.persurface 53C42 53B25 53C40

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Free amino group-directed C(sp^(2))-h.arylation ofα-amino-β-aryl esters by palladium catalysis

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Ch.nese Ch.mical Letters 2024年第2期35卷 358-360页

作者： Yue gao Yu Du Weiping Su State Key Laboratory of Structural Ch.mistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science & Tech.ology Innovation Laboratory for Optoelectronic Information of Ch.na Fuzhou 350108China University of Ch.nese Academy of Sciences Beijing 100049China

Native amino-directed palladium-catalyzed C(sp^(3))-h.activation/functionalization h.s been developed for modification ofα-amino acids and *** a palladium(Ⅱ)-catalyzed C(sp^(2))-h.arylation ofα-amino-β-aryl esters h.s been disclosed,using th. native amino as th. directing group.A variety of ch.ralα-amino-β-aryl esters can be functionalized to give th. corresponding orth.-substituted mono-and di-arylated products.

关键词： Native amino-directed Palladium catalyst C(sp^(2))-h.arylation α-Amino-β-aryl ester Ch.ralα-amino acid

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