检索结果-南通市图书馆

competition between fusion-evaporation and multifragmentation in central collisions in ^(58)Ni+^(48)ca at 25A MeV

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

Nuclear Science and Techniques 2013年第5期24卷 82-88页

作者： FRANcALANZA L ABBONDANNO U AMORINI F BARLINI S BINI M BOUGAULT R BRUNO M cARDELLA G cASINI G AGOSTINO M D' De FILIPPO V De SANcTIS J GERAcI E GIUSSANI A GRAMEGNA F GUIOT B KRAVcHUK V La GUIDARA E LANZALONE G Le NEINDRE N maiolino c MARINI P MORELLI L OLMI A PAGANO A PAPA M PIANTELLI S PIRRONE S POLITI G POGGI G PORTO F RUSSOTTO P RIZZO F VANNINI G VANNUccI L INFN Laboratori Nazionali del Sud-LNS Catania 95123Italy Dipartimento di Fisica Universitàdi Catania I-95129Italy INFN Sezione di Trieste Trieste I-34127Italy Dipartimento di Fisica Universitàdi FirenzeINFN Sezione di Firenze 1-50139Italy LPc caen IN2P3-CNRS/ENSICAEN and UniversitéF-14050 Caen cedex 5-140France Dipartimento di Fisica Universitàdi Bologna and INFN Sezione di Bologna 4-50121Italy INFN Sezione di catania I-95129 Italy INFN Sezione di Firenze I-50139 Italy Dipartimento di Fisica Universitàdi Milano and INFN Sezione di Milano1-20126Italy INFN Laboratori Nazionali di Legnaro 1-35020 Italy centro Siciliano di Fisica Nucleare e Struttura della Materia Catania 1-95129Italy UniversitàKore Enna 1-94100Italy

The experimental data concerning the58Ni+48ca reaction at Elab(Ni)=25A MeV,collected by using the cHIMERA 4π device,have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the Fermi energy *** a main criterion for centrality selection we have chosen the flow angle(flow) method,making an event-by-event analysis that considers the shape of events,as it is determined by the eigenvectors of the experimental kinetic-energy *** the selected central events(flow >60°) some global variables,good to characterize the pattern of central collisions have been *** main features of the reaction products were explored by using different constraints on some of the relevant observables,like mass and velocity distributions and their *** emphasis was devoted,for central collisions,to the competition between fusion-evaporation processes with subsequent identification of a heavy residue and a possible multifragmentation mechanism of a well defined(if any) transient nuclear *** evolution of the system and pre-equilibrium emission were taken into account by simulating the reactions in the framework of transport *** approaches have been envisaged(dynamical stochastic BNV calculations + sequential SIMON code,QMD,coMD,etc.).Preliminary comparison of the experimental data with BNV calculations shows reasonable agreement with the assumption of sequential multifragmentation emission in the mass region of IMFs close to the heavy *** deviations from sequential processes were found for those IMFs in the region of masses intermediate between the mass of heavy residues and the mass of light *** simulations are in *** experimental analysis will be enriched also by information obtained inspecting the IMF-IMF correlation function,in order to elucidated the nature of space-time decay property of the emitting source associated with events having

关键词：多重碎裂中心碰撞蒸发过程 MeV 竞争熔合国际货币基金组织事件分析

在线全文

学校读者我要写书评

暂无评论

质量数A≈125的热核GDR特性的研究

原子核物理评论 2004年第3期21卷 207-209页

作者：范红梅 D.Santonocito Y.Blumenfeld P.Piattelli c.Agodi R.Alba G.Bellia R.coniglione F.Delaunay A.Del Zoppo P.Finocchiaro N.Frascaria V.Lima c.maiolino E.Migneco P.Sapienza 中国科学院近代物理研究所甘肃兰州 730000 INFN-LNS 44 Via S.Sofia I-95123 Catania Italy Institute de Physique Nucleaire N2P3-CNRS-F-91046 Orsay France Dipartimento di Fisica dell'Università di catania Italy INFN-LNS 44 Via S.Sofia I-95123 Catania ItalyDipartimento di Fisica dell'Università di Catania Italy

简单介绍了利用LNS的回旋加速器产生的116Sn束轰击12c和24Mg靶的实验装置以及实验过程.该实验通过MEDEA探测器测量了由全熔合与非全熔合反应产生的较低激发能区(160—300MeV)质量数A≈125的热核的巨偶极共振特性,比较了不同靶子、不同... 详细信息

简单介绍了利用LNS的回旋加速器产生的116Sn束轰击12c和24Mg靶的实验装置以及实验过程.该实验通过MEDEA探测器测量了由全熔合与非全熔合反应产生的较低激发能区(160—300MeV)质量数A≈125的热核的巨偶极共振特性,比较了不同靶子、不同束流能量时巨偶极共振的γ产额的变化.

关键词：熔合反应巨偶极共振γ产额氟化钡晶体 MEDEA探测器原子核物理

Light sheet microscope scanning of biointegrated microlasers for localized refractive index sensing

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2024年第8期12卷 1673-1680页

作者： ROSS c.cOWIE MARcEL ScHUBERT SUPA School of Physics and AstronomyUniversity of St AndrewsSt AndrewsUK Humboldt centre for Nano and Biophotonics Department of ChemistryUniversity of CologneCologneGermany

Whispering gallery mode(WGM)microlasers are highly sensitive to localized refractive index changes allowing to link their emission spectrum to various chemical,mechanical,or physical *** recently found applications in biological studies within single cells,in three-dimensional samples such as multicellular spheroids,or in ***,detailed studies of biological samples also need to account for the structural heterogeneity of tissues and live animals,therefore requiring a combination of high-resolution microscopy and laser ***,we design and construct a light sheet fluorescence microscope with a coupled spectrometer for use in microlaser studies for combined high-resolution,high-speed imaging and WGM spectral *** light sheet illumination profile and the decoupled geometry of excitation and emission hereby directly affect the lasing and sensing properties,mainly through geometric constraints and by light coupling *** demonstrate the basic working principle of microlaser spectroscopy under light sheet excitation and measure the absolute refractive index within agarose and in zebrafish tail muscle *** further analyze the light coupling conditions that lead to the occurrence of two separate oscillation *** so-called cross modes can be scanned around the entire microlaser surface,which allows to estimate a surface-averaged refractive index profile of the microlaser environment.

关键词： refractive index excitation

A toast to a zebrafish germ cell induction cocktail

在线全文

学校读者我要写书评

暂无评论

Science china(Life Sciences) 2024年第6期67卷 1314-1315页

作者： Mary c.Mullins Department of cell and Developmental Biology University of Pennsylvania Perelman School of MedicinePhiladelphia 19104USA

The zebrafish field is ringing in the new year with a publication from Yonghua Sun's laboratory(Wang et al.,2023)of a cocktail of germline factors that can induce all cells of the zebrafish embryo into primordial germ cells(PGcs)at phenomenal *** major advance is not only of great interest to germ cell biologists,but it has important applications to the entire zebrafish field,as shown in Wang et al.(2023).

关键词： fish zebra field

Performance of evolutionary optimized machine learning for modeling total organic carbon in core samples of shale gas fields

在线全文

学校读者我要写书评

暂无评论

Petroleum 2024年第1期10卷 150-164页

作者： Leonardo Goliatt c.M.Saporetti L.c.Oliveira E.Pereira Department of computational and Applied Mechanics Federal University of Juiz de ForaJuiz de ForaBrazil Department of computational Modeling Polytechnic InstituteRio de Janeiro State UniversityNova FriburgoBrazil Petrobras Rio de JaneiroBrazil Department of Stratigraphy and Paleontology Rio de Janeiro State UniversityRio de JaneiroBrazil

Rock samples'TOc content is the best indicator of the organic matter in source *** origin rock samples’analysis is used to calculate it manually by *** method requires time and resources because it relies on samples from many well intervals in source ***,research has been done to aid this *** learning algorithms can estimate total organic carbon instead of well logs and stratigraphic *** light of these efforts,the current work present a study on automating the total organic carbon estimation using machine learning approaches improved by an evolutionary methodology to give the model flexibility and *** algorithms,differential evolution,particle swarm optimization,grey wolf optimization,artificial bee colony,and evolution strategies were used to improve machine learning models to predict *** six metaheuristics were integrated into four machine learning methods:extreme learning machine,elastic net linear model,linear support vector regression,and multivariate adaptive regression *** samples from the YuDong-Nan shale gas field,located in the Sichuan basin,were used to evaluate the hybrid *** findings show that combining machine learning models with an evolutionary algorithms in a hybrid fashion produce flexible models that accurately predict *** results show that,independent of the metaheuristic used to guide the model selection,optimized extreme learning machines attained the best performance scores according to six *** hybrid models can be used in exploratory geological research,particularly for unconventional oil and gas resources.

关键词： Total organic carbon Hybrid models Automated machine learning Evolutionary algorithms Geology

Recent advances on bismuth oxyhalides for photocatalytic cO_(2)reduction

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第6期140卷 183-203页

作者： Liangpang Xu Jimmy c.Yu Ying Wang Department of chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong 999077China

Photocatalytic conversion of cO_(2)into fuels such as cO,cH_(4),and cH_(3)OH,is a promising approach for achieving carbon *** oxyhalides(BiOX,where X=cl,Br,and I)are appropriate photocatalysts for this purpose due to the merits of visible-light-active,efficient charge separation,and easy-to-modify crystal structure and surface *** practical applications,multiple strategies have been proposed to develop high-efficiency BiOX-based *** review summarizes the development of different approaches to prepare BiOX-based photocatalysts for efficient cO_(2)*** the review,the fundamentals of photocatalytic cO_(2)reduction are ***,several widely used modification methods for BiOX photocatalysts are systematacially discussed,including heterojunction construction,introducing oxygen vacancies(OVs),Bi-enrichment,heteroatom-doping,and morphology ***,the challenges and prospects in the design of future BiOX-based photocatalysis for efficient cO_(2)reduction are examined.

关键词： Bismuth oxyhalides Photocatalysis cO_(2)reduction Modification methods

Nonaqueous potassium-ion full-cells:Mapping the progress and identifying missing puzzle pieces

在线全文

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2024年第6期93卷 384-399,I0010页

作者： Badre Larhrib Louiza Larbi Lénaïc Madec Universite de Pau et des Pays de l’Adour E2S UPPACNRSIPREMPauFrance Universitéde Haute-Alsace Institut de Science des Matériaux de Mulhouse(IS2M)CNRS UMR 7361F-68100 MulhouseFrance Universitéde Strasbourg F-67081 StrasbourgFrance Réseau sur le Stockage Electrochimique de l’Energie CNRS FR3459AmiensFrance Institut des Matériaux Jean Rouxel(IMN) CNRS UMR 6502Univ.Nantes44322 Cedex 3 NantesFrance

This review addresses the growing interest for potassium-ion full-cells(KIFcs)in view of the transition from potassium-ion half-cells(KIHcs)toward commercial K-ion batteries(KIBs).It focuses on the key parameters of KIFcs such as the electrode/electrolyte interfaces challenge,major barriers,and recent advancements in *** strategies for enhancing KIFc performance,including interfaces co ntrol,electrolyte optimization,electrodes capacity ratio,electrode material screening and electrode design,are *** review highlights the need to evaluate KIBs in full-cell configurations as half-cell results are strongly impacted by the K metal *** also emphasizes the importance of understanding solid electrolyte interphase(SEI)formation in KIFcs and explores promising nonaqueous as well as quasiand all-solid-state electrolytes *** review thus paves the way for practical,cost-effective,and scalable KIBs as energy storage systems by offering insights and guidance for future research.

关键词： K-ion full-cells Potassium-ion batteries cross-talk Solid-state batteries Potassium reactivity Electrolyte design Electrode design

A perspective on utilizing the minority stress model for HIV and mental health care for men who have sex with men

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2024年第8期17卷 333-334页

作者： Rowalt c.Alibudbud Department of Sociology and Behavioral Sciences De La Salle UniversityManilaPhilippines

In 2022,the Joint United Nations Programme on HIV/AIDS(UNAIDS)and the World Health Organization(WHO)called upon global,regional,national,and local stakeholders to embrace a holistic approach to person-centered HIV prevention,treatment,and care[1].This approach emphasizes integrating mental health and psychosocial support services into existing frameworks[1].It recognizes the critical role these services play in addressing mental distress and improving the overall well-being and quality of life for people living with HIV[1].In light of men who have sex with men(MSM)remaining a key population affected by HIV[1],it becomes imperative to delve into the shared factors that influence their HIV care and mental health,among which minority stress stands out as a critical consideration.

关键词： prevention distress stress

Exercise immunology:Novel insights

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 Sport and Health Science 2024年第3期13卷 277-279,I0001页

作者： David c.Nieman Human Performance Laboratory Appalachian State UniversityNorth Carolina Research CampusKannapolisNC 28081USA

The coronavirus disease 2019(cOVID-19)pandemic heightened worldwide attention on the influence of exercise on the immune *** were raised about whether regular moderate-to-vigorous physical activity(MVPA)could help prevent cOVID-19 or mitigate symptoms when *** MVPA bolster immunity among those most prone to cOVID-19 including the elderly,obese,and immunocompromised patients?Does regular MVPA dampen systemic inflammation,thereby lessening the cOVID-19 cytokine storm?

关键词： immunity inflammation thereby