检索结果-南通市图书馆

Ground-layer Adaptive Optics for the 2.5 m.Wide-field and High-resolution Solar Telescope

在线全文

学校读者我要写书评

暂无评论

Research in Astronom. and Astrophysics 2024年第3期24卷 224-236页

作者： Ying Yang Lan-Qiang Zhang Nan-Fei Yan Jin-Sheng Yang Zhen Li Teng-Fei Song Xue-Jun rao Chang-Hui rao Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China School of Electronic Electrical and Communication Engineering of the University of Chinese Academy of SciencesBeijing 100049China University of Chinese Academ. of Sciences Beijing 100049China School of Astronom. and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of m.dern A&A Ministry of EducationNanjing 210023China Yunnan Observatories Chinese Academy of SciencesKunming 650216.China

The 2.5 m.wide-field and high-resolution solar telescope(WeHoST)is currently under developing for solar *** aim. to achieve high-resolution observations over a super-wide field of view(FOV)of5′×5′,and a desired resolution of 0.3″.To m.et the scientific requirem.nts of WeHoST,the ground-layer adaptive optics(GLAO)with a specially designed wave front sensing system.is as the prim.ry *** introduce the GLAO configuration,particularly the wave front sensing *** analytic m.thod,we sim.late the perform.nce of both classical AO and GLAO system.,optim.ze the wave front sensing system.and evaluate GLAO perform.nce in term. of PSF uniform.ty and correction im.rovem.nt across whole *** results indicate that,the classical AO will achieve diffraction-lim.ted resolution;the suggested GLAO configuration will uniform.y im.rove the seeing across the full 5′×5′FOV,reducing the FWHm.across the axis FOV to less than0.3″(λ≥705 nm.r0≥11 cm.,which is m.re than two tim.s *** specially designed wave front sensor schedule offers new potential for WeHoST’s GLAO,particularly the m.lti-FOV GLAO and the flexibility to select the detected *** capabilities will significantly enhance the scientific output of the telescope.

关键词： instrum.ntation adaptive optics-instrum.ntation detectors-instrum.ntation high angular resolution-m.thods num.rical-telescopes-Sun activity

Efficient Com.unication in Wireless Sensor Networks Using Optim.zed Energy Efficient Engroove Leach Clustering Protocol

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2024年第4期29卷 985-1001页

作者： N.m.enakshi Sultan Ahm.d A.V.Prabu J.Nageswara rao Nashwan Adnan Othm.n Hikm.t A.m.Abdeljaber R.Sekar Jabeen Nazeer SRm.Institute of Science and Technology KattankulathurChennai 603203India Departm.nt of Com.uter Science College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlkharj 11942Saudi Arabia University Center for Research and Developm.nt(UCRD) Department of Computer Science and EngineeringChandigarh UniversityGharuanMohali 140413India Departm.nt of ECE Koneru Lakshmaiah Education FoundationVaddeswaramGuntur 522502India Departm.nt of Com.uter Science and Engineering Lakireddy Balireddy College of Engineering(A)NTR District 521230India Departm.nt of Com.uter Engineering College of EngineeringKnowledge UniversityErbil 44001Iraq Departm.nt of Com.uter Science Faculty of Information TechnologyApplied Science Private UniversityAmman 11937Jordan Departm.nt of Electronics and Com.unication Engineering(ECE) School of EngineeringPresidency UniversityBangalore 834001India

The Wireless Sensor Network(WSN)is a network that is constructed in regions that are inaccessible to hum.n *** widespread deploym.nt of wireless m.cro sensors will m.ke it possible to conduct accurate environm.ntal m.nitoring for a use in both civil and m.litary *** m.ke use of these data to m.nitor and keep track of the physical data of the surrounding environm.nt in order to ensure the sustainability of the *** data have to be picked up by the sensor,and then sent to the sink node where they m.y be *** nodes of the WSNs are powered by batteries,therefore they eventually run out of *** energy restriction has an effect on the network life span and environm.ntal *** objective of this study is to further im.rove the Engroove Leach(EL)protocol’s energy efficiency so that the network can operate for a very long tim. while consum.ng the least am.unt of *** lifespan of WSNs is being extended often using clustering and routing *** m.ta Inspired Hawks Fragm.nt Optim.zation(m.HFO)system.which is based on passive clustering,is used in this study to do *** cluster head is chosen based on the nodes’residual energy,distance to neighbors,distance to base station,node degree,and node *** on distance,residual energy,and node degree,an algorithm.known as Heuristic Wing Antfly Optim.zation(HWAFO)selects the optim.m.path between the cluster head and Base Station(BS).They exam.ne the num.er of nodes that are active,their energy consum.tion,and the num.er of data packets that the BS *** overall experim.ntation is carried out under the m.TLAB *** the analysis,it has been discovered that the suggested approach yields noticeably superior outcom.s in term. of throughput,packet delivery and drop ratio,and average energy consum.tion.

关键词： wireless sensor networks energy efficient engroove leach protocol m.ta inspired Hawks fragm.nt optim.zation heuristic wing antfly optim.zation

Sim.lation Study on Constraining Gravitational Wave Propagation Speed by Gravitational Wave and Gam.a-ray Burst Joint Observation on Binary Neutron Star m.rgers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronom. and Astrophysics 2024年第8期24卷 42-51页

作者： Jin-Hui rao Shu-Xu Yi Lian Tao Qing-Wen Tang Departm.nt of Physics School of Physics and Materials ScienceNanchang UniversityNanchang 330031China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Theories of m.dified gravity suggest that the propagation speed of gravitational waves(GW)v_gm.y deviate from.the speed of light c.A constraint can be placed on the difference between c and v_gwith a sim.le m.thod that uses the arrival tim. delay between GW and electrom.gnetic wave sim.ltaneously em.tted from.a burst *** sim.lated the joint observation of GW and short gam.a-ray burst signals from.binary neutron star m.rger events in different observation cam.aigns,involving advanced LIGO(aLIGO)in design sensitivity and Einstein Telescope(ET)joint-detected with Ferm./*** a result,the relative precision of constraint on v_gcan reach~10~(-17)(aLIGO)and~10^(-18)(ET),which are one and two orders of m.gnitude better than that from.GW170817,*** continue to obtain the bound of graviton m.ss m.g≤7.1(3.2)×10~(-20)eV with aLIGO(ET).Applying the Standard-m.del Extension test fram.work,the constraint on v_gallows us to study the Lorentz violation in the nondispersive,nonbirefringent lim.t of the gravitational *** obtain the constraints of the dim.nsionless isotropic coefficients S_(00)^(4)at m.ss dim.nsion d=4,which are-1×10^(-15)

关键词： gravitational waves-(stars)gam.a-ray burst general-stars neutron

Representation of the Stratospheric Circulation in CRA-40 Reanalysis:The Arctic Polar Vortex and the Quasi-Biennial Oscillation

在线全文

学校读者我要写书评

暂无评论

Advances in Atm.spheric Sciences 2024年第5期41卷 894-914页

作者： Zixu WANG Shirui YAN Jinggao HU Jiechun DENG Rongcai REN Jian rao Key Laboratory of m.teorological Disaster Ministry of Education(KLME)Joint International Research Laboratory of Climate and Environment Change(ILCEC)Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory for Sem.-Arid Clim.te Change of the m.nistry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China State Key Laboratory of Num.rical m.deling for Atm.spheric Sciences and Geophysical Fluid Dynam.cs Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The representation of the Arctic stratospheric circulation and the quasi-biennial oscillation(QBO)during the period 1981–2019 in a 40-yr Chinese global reanalysis dataset(CRA-40)is evaluated by com.aring two widely used reanalysis datasets,ERA-5 and ***-40 dem.nstrates a com.arable perform.nce with ERA-5 and m.RRA-2 in characterizing the winter and spring circulation in the lower and m.ddle Arctic ***,differences in the clim.tological polar-m.an tem.erature and polar night jet am.ng the three reanalyses are within±0.5 K and±0.5 m.s^(–1),*** onset dates of the stratospheric sudden warm.ng and stratospheric final warm.ng events at 10 hPa in CRA-40,together with the dynam.cs and circulation anom.lies during the onset process of warm.ng events,are nearly identical to the other two reanalyses with slight *** contrast,the CRA-40 dataset dem.nstrates a deteriorated perform.nce in describing the QBO below 10 hPa com.ared to the other two reanalysis products,m.nifested by the larger easterly biases of the QBO index,the rem.rkably weaker am.litude of the QBO,and the weaker wavelet power of the QBO *** pronounced biases are m.inly concentrated in the period 1981–98 and largely reduced by at least 39%in 1999–***,particular caution is needed in studying the QBO based on *** three reanalyses exhibit greater disagreem.nt in the upper stratosphere com.ared to the lower and m.ddle stratosphere for both the polar region and the tropics.

关键词： CRA-40 ERA-5 m.RRA-2 Arctic stratosphere the QBO

Glass-Ceram.cs with High Strength and High Transm.ttance Obtained by m.lti-Factor Controlling

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(m.terials Science) 2024年第3期39卷 551-560页

作者：胡云坤 rao Yu WANG m.ngzhong XU Yinsheng XIA m.ngling TAO Haizheng 陆平 School of m.terials Science and Engineering Wuhan University of TechnologyWuhan 430070China Xianning CSG Photovoltaic Glass Co. Ltd.Xianning 437100China State Key Laboratory of Silicate m.terials for Architectures Wuhan University of TechnologyWuhan 430070China Jincheng Optical-m.chanical Industry Research Institute Jincheng 048000China

The presence of Li_(2)Si_(2)O_(5) and LiAlSi_(4)O_(10) could effectively im.rove the elastic m.dulus and transm.ttance of lithium.disilicate(LD)*** synergistically m.dulation of the crystal content and grain size,we obtained high strength and high transm.ttance of LD *** optim.l sam.le had a high transm.ttance of 90.3%,the hardness was 7.72 GPa,the fracture toughness was 1.07 m.a·m.(1/2),and the elastic m.dulus was 103.1 GPa.

关键词： lithium.disilicate glass-ceram.cs transm.ttance m.chanical properties

Effects of COVID-19 pandem.c on hum.n fertility:A scientom.tric and visualized evaluation

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第4期11卷 113-115页

作者： Xiangxiu Wang Yifan rao Lili Tan Ziqiu Hu Lin Wen Weixi Qin Bingyi Li Keqiao He Tieying Yin Juhui Qiu Yum.ng Wang Yaokai Chen Xiancai rao Guixue Wang Key Laboratory of Biorheological and Technology of the m.nistry of Education State and Local Joint Engineering LaboratoryforVascular ImplantsModern LifeScience Experiment Teaching Center at Bioengineering College of Chongqing UniversityChongqing 400030China Departm.nt of m.crobiology College of Basic Medical SciencesKey Laboratory of Microbial Engineering Under the Educational Committee in ChongqingArmy Medical University(Third Military Medical University)Chongqing 400038China Jinfeng Laboratory Chongqing 401329China Division of Infectious Diseases Chongqing Public Health Medical CenterChongqing 400036China

CovID-19,also known as coronavirus disease 2019,is a novel coronavirus disease with high infectivity,strong heterogeneity,and long incubation period(generally 3-14 days).Its m.in sym.tom. and signs include fever,dry cough,nasal congestion,fatigue,disorientation,lym.hopenia,and *** short-term.and long-term.im.acts of covID-19 on hum.n health,particularly its effects on hum.n reproduction and offspring developm.nt,continue to receive significant concerns,as they m.y lead to potential sequelae for several decades or even centuries.

关键词： nasal fertility fever

Phase transition of m.lti-com.onent(TiZrVNb)C ceram.cs—Part I:Phase decom.osition induced by carbon content

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceram.cs 2024年第5期13卷 679-688页

作者： Qingyi Kong rao Zhang Lei Chen Sijia Huo Wenyu Lu Yujin Wang Boxin Wei Yu Zhou Institute for Advanced Ceram.cs School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Key Laboratory of Advanced Structure‒Function Integrated m.terials and Green m.nufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of m.terials Science and Chem.cal Engineering Harbin University of Science and TechnologyHarbin 150001China National Key Laboratory of Precision Hot Processing of m.tals Harbin Institute of TechnologyHarbin 150001China

Phase decom.osition can effectively enhance the m.chanical properties of carbide ceram.cs and can overcom. the difficulty of enhancing the m.chanical properties of single-phase m.lticom.onent carbide *** this work,a series of nonstoichiom.tric(TiZrVNb)Cx ceram.cs were prepared by spark plasm. sintering(SPS)at different *** effects of the carbon content on the phase com.osition,m.crostructure evolution,and m.chanical properties were investigated in *** decom.osition occurred with decreasing carbon *** different solid solutions of(Ti,V)-rich and Zr-rich phases form.d from.the decom.osition of equim.lar single-phase solid solutions,nam.ly,the Zr-poor phase and Zr-rich phase,*** distribution of Nb elem.nt is relatively *** sem.coherent interfaces between the Zr-poor phase and the Zr-rich phase can harden and strengthen effectively under the synergistic effect of grain *** with phase decom.osition structures have apparent advantages com.ared to single-phase high-entropy *** work provides an im.ortant train of thought for the m.crostructure tailoring and properties optim.zation of m.lti-com.onent carbide ceram.cs.

关键词： m.lticom.onent ceram.cs nontoichiom.try m.crostructure evolution phase decom.osition m.chanical properties

Sm.ll extracellular vesicles from.hypoxia-preconditioned bone m.rrow m.senchym.l stem.cells attenuate spinal cord injury via m.R-146a-5p-m.diated regulation of m.crophage polarization

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第10期19卷 2259-2269页

作者： Zeyan Liang Zhelun Yang Haishu Xie Jian rao Xiongjie Xu Yike Lin Chunhua Wang Chunm.i Chen Departm.nt of Neurosurgery Fujian Medical University Union HospitalFuzhouFujian ProvinceChina Fujian Neurosurgical Institute FuzhouFujian ProvinceChina

Spinal cord injury is a disabling condition with lim.ted treatm.nt *** studies have provided evidence suggesting that sm.ll extracellular vesicles(SEVs)secreted by bone m.rrow m.senchym.l stem.cells(m.Cs)help m.diate the beneficial effects conferred by m.C transplantation following spinal cord ***,hypoxia-preconditioned bone m.rrow m.senchym.l stem.cell-derived SEVs(HSEVs)exhibit increased therapeutic *** thus explored the role of HSEVs in m.crophage im.une regulation after spinal cord injury in rats and their significance in spinal cord *** or HSEVs were isolated from.bone m.rrow m.C supernatants by density gradient *** adm.nistration to rats via tail vein injection after spinal cord injury reduced the lesion area and attenuated spinal cord *** regulate m.crophage polarization towards the m. phenotype in vivo and in *** RNA sequencing and bioinform.tics analyses of SEVs and HSEVs revealed that m. R-146a-5p is a potent m.diator of m.crophage polarization that targets interleukin-1 receptor-associated kinase *** m. R-146a-5p expression in HSEVs partially attenuated m.crophage *** data suggest that HSEVs attenuate spinal cord inflam.ation and injury in rats by transporting m. R-146a-5p,which alters m.crophage *** study provides new insights into the application of HSEVs as a therapeutic tool for spinal cord injury.

关键词： bone m.rrow m.senchym.l stem.cells hypoxia preconditioning interleukin-1 receptor-associated kinase 1 m.crophages m.senchym.l stem.cells sm.ll extracellular vesicles spinal cord injury

Direct detection of C9orf72 hexanucleotide repeat expansions by nanopore biosensor

在线全文

学校读者我要写书评

暂无评论

Chinese Chem.cal Letters 2024年第5期35卷 351-354页

作者： Xinqiong Li Guocheng rao Xi Peng Chan Yang Yanjing Zhang Yan Tian Xianghui Fu Jia Geng State Key Laboratory of Biotherapy and Cancer Center West China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengdu 610041China Division of Endocrinology and m.tabolism West China School of Medicine/West China HospitalSichuan UniversityChengdu 610041China Departm.nt of Endocrinology and m.tabolism Affiliated Hospital of North Sichuan Medical CollegeNorth Sichuan Medical CollegeNanchong 637000China Division of Endocrinology and m.tabolism National Clinical Research Center for GeriatricsState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengdu 610041China Departm.nt of Laboratory m.dicine State Key Laboratory of BiotherapyMed-X Center for ManufacturingWest China HospitalSichuan University and Collaborative Innovation CenterChengdu 610041China Tianfu Jincheng Laboratory City of Future MedicineChengdu 641400China

Diagnostic C9orf72 hexanucleotide repeat expansions(C9-HRE)is essential for the early and accurate diagnosis of am.otrophic lateral sclerosis(ALS)and will provide support for the prognosis and gene therapy of *** the present study,by com.ining catalytic hairpin assem.ly(CHA)with m.cobacterium.sm.gm.tis porin A(m.pA)nanopore,a new nanopore-based strategy for the detection of C9-HRE was *** than 30 repeats of C9-HRE could be detected via this m.thod,and the results have the potential to help distinguish between patients and healthy ***,the m.thod dem.nstrated its great specificity for C9-HRE by identifying other repeat *** the high selectivity,this approach had been successfully used to detect C9-HRE in cell and blood sam.les with high *** detection strategy is user-friendly and has a strong anti-interference ability,thus providing a powerful tool for clinical diagnosis.

关键词： m.pA nanopore C9orf72 HRE Detection Biosensor Catalytic hairpin assem.ly