检索结果-南通市图书馆

Investigations of nuclear chirality at iThemba LABS

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第2期19卷 7-38页

作者： R.A.Bark e.A.Lawrie C.Liu S.Y.Wang iThemba Laboratory for Accelerator Based Sciences National Research FoundationP.O.Box 722Somerset-West 7129South Africa Department of Physics University of the Western CapePrivate Bag X177535BellvilleSouth Africa Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial environment Institute of Space SciencesShandong UniversityWeihai 264209China

Progress in the studies of chirality in atomic nuclei at iThemba LABS is *** regions of chirality,around mass 80 and 190 have been discovered using the AFRODITe array,specifically in the nuclei^(74)As,^(78,80,82)Br,^(81)Kr,and^(193,194,198)*** phenomena have been observed,including multiple chiral bands in the same nucleus,the coexistence of octupole correlations and nuclear chirality,and the coexistence of pseudo spin and nuclear *** best example of chiral degeneracy to date was found in ^(194)*** level scheme of ^(106)Ag has been revisited and interpreted in terms of two-and four-quasiparticle *** using the particle-rotor model have shown that the fingerprints of chirality in the two-quasiparticle system only can occur in an idealised model *** systems with a higher number of quasiparticles,the calculations showed that nuclear chirality can persist.

关键词： chirality high-spin states particle-rotor model

Oxidation-induced strengthening behavior of reaction formed Al_4SiC_4 ceramics

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

Rare Metals 2007年第S1期26卷 94-98页

作者： HUANG Xiaoxiao1,2),WeN Guangwu1,3),LIU Ruitang2),and ZHeNG Xin1)1) School of Materials Science and Technology,Harbin Institute of Technology,Harbin 150001,China 2) School of Material Science and Chemical engineering,Harbin engineering University,Harbin 150001,China 3) School of Materials Science and Technology,Harbin Institute of Technology at weihai,weihai 264209,China Harbin Inst Technol Sch Mat Sci & Technol Harbin 150001 Peoples R China Harbin Inst Technol Sch Mat Sci & Chem Engn Harbin 150001 Peoples R China Harbin Inst Technol Sch Mat Sci & Technol Weihai 264209 Peoples R China

The bending strengths of Al4SiC4 ceramics were investigated from room temperature to 1300 ℃ in air and in vacuum,*** is a novel property that the bending strength increases with increasing test temperatures up to 1300 ℃ in *** strength value of Al4SiC4 ceramics is 449.7 MPa at 1300 ℃ in air,which is about 1.5 times of that at room temperature(300 MPa).The self-healing behavior of the flaws on the specimen surface due to the oxidation of the surface layer of the Al4SiC4 ceramics is considered as the main enhancement mechanism at high temperatures.

关键词： calcination and hot pressing surface strength Al_4SiC_4

Quadratic stabilization for uncertain stochastic systems

在线全文

学校读者我要写书评

暂无评论

控制理论与应用（英文版） 2005年第3期3卷 252-258页

作者： Jun＇e FeNG weihai ZHANG School of Mathematics and System Sciences Shandong UniversityJinan Shandong 250100 China College of electronic Information and Control engineering Shandong Institute of Light IndustryJinan Shandong 250100 China

This paper discusses the robust quadratic stabilization control problem for stochastic uncertain systems, where the uncertain matrix is norm bounded, and the external disturbance is a stocbastic process, Two kinds of controllers are designed, which include state feedback case and output feedback case. The conditions for the robust quadratic stabilization of stochastic uncertain systems are given via linear matrix inequalities. The detailed design methods are presented. Numerical examples show the effectiveness of our results.

关键词： Robust quadratic stabilization output dynamic feedback state feedback Wiener process Linear matrix inequality

Solution processed inorganic V20x as interfacial function materials for inverted planar-heterojunction perovskite solar cells with enhanced efficiency

在线全文

学校读者我要写书评

暂无评论

Nano Research 2016年第10期9卷 2960-2971页

作者： Haitao Peng weihai Sun Yunlong Li Senyun Ye Haixia Rao Weibo Yan Huanping Zhou Zuqiang Bian Chunhui Huang Department of energy and Resources engineering College of Engineering Peking University Beijing 100871 China State Key Laboratory of Rare earth Materials Chemistry and Applications Peking University Beijing 10087 I China Department of Materials Science and engineering College of Engineering Peking University Beijing 100871 China

An inverted planar heterojunction perovskite solar cell （PSC） is one of the most competitive photovoltaic devices exhibiting a high power conversion efficiency （PCe） and nearly free hysteresis in the voltage-current output. However, the band alignment between the transport materials and the perovskite absorber has not been optimized, resulting in a lower open-circuit voltage （Voc） than that of regular PSCs. To address this issue, we tune the band alignment in perovskite photovoltaic architecture by introducing bilayer structured transport materials, e.g., the hole transport material poly（ethylenedioxythiophene）：poly（styrene sulfonate）（PeDOT：PSS）/V2Os. In this study, solution processed inorganic V2Ox interlayer is incorporated into PeDOT：PSS for achieving improved film surface properties as well as optical and electrical properties. For example, the work function （WF） was changed from 5.1 to 5.4 eV. A remarkably high PCe of 17.5% with nearly free hysteresis and a stabilized efficiency of 17.1% have been achieved. electronic impedance spectra （eIS） demonstrate a significant increase in the recombination resistance after introducing the interlayer, associated with the high Voc output value of 1.05 V. Transient photocurrent and photovoltage measurements indicate that a comparable charge transport process and an inhibited recombination process occur in the PSC with the introduction of the V20x interlayer.

关键词： perovskite solar cells vanadium oxide hole transport layer band alignment hysteresis

Randomly Orthogonal (p, f)-factorizations in Graphs

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

Acta Mathematicae Applicatae Sinica 2002年第3期18卷 489-494页

作者： Gui-zhen Liu, He-ping LongDepartment of Mathematics, Shandong University, Jinan 250100, ChinaDepartment of Mathematics, Shandong University at weihai, weihai 264209, China

Let G be a graph with vertex set V(G) and edge set e(G) and let g and f be two integer-valued functions defined on V(G) such that 2k-1≤g(x) ≤ f(x) for all x ∈ V(G). Let H be a subgraph of G with mk edges . In this paper it is proved that every (mg + m - 1,mf- m + 1)-graph G has (g, f)-factorizations randomly κ-orthogonal to H and shown that the result is best possible.

关键词： Graph (g f)-factorization randomly fc-orthogonal factorization

Surface modification of indium tin oxide by oxygen plasma immersion ion implantation

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第4期56卷 925-929页

作者： CHeNG weihai He Long FAN XiaoXuan OU QiongRong LIANG RongQing Department of Light Sources and Illuminating engineering Fudan University

Organic electroluminescent device,also known as organic light-emitting diode (OLeD),is a kind of solid state light emitting device by carrier injection which can directly transform electrical energy into luminous *** to its low operating voltage,low energy consumption,high brightness,flexibility in the choice of materials and easy realization of full color display,OLeD is the potential material both in the display and illumination ***,there is much scope to improve the efficiency,lifetime,and reduce the cost in mass production before OLeDs can replace traditional technology in some application *** this work,we report the oxygen plasma immersion ion implantation (PIII) to improve the surface oxygen ratio of ITO films for further increase of surface work function above the common treatment of O2 inductively coupled plasma (ICP).The ratio of oxygen content at the surface layer was improved to be much higher than by O2 ICP treatment.A further surface work function relative increase of 0.4e V above OICP sample and 0.4 eV above the as-prepared sample can be estimated by the peak relative shift in the X-ray photoelectron spectroscopy (XPS) ***,the XPS characterization was carried out at least 50 h after the PIII implantation to indicate that the surface modifying effects are *** variations of transparency and conductivity of the PIII treated ITO samples can be neglected.

关键词： solar energy parabolic trough solar collector collector efficiency lag behind heat loss

同方期刊数据库

Pulse collapse and blue-shifted enhanced supercontinuum in a photonic crystal fiber

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2013年第3期22卷 323-328页

作者：刘文军庞利辉林翔高仁喜宋晓伟 Department of Optoelectronics Science Harbin Institute of Technology at Weihai

The blue-shifted supercontinuum generation in a photonic crystal fiber pumped by high peak power femtosecond pulses with a wavelength located in the anomalous dispersion region is investigated experimentally and *** formation of a blue-shifted enhanced supercontinuum due to the pulse collapse is *** process of the pulse collapse is measured by using the grating-eliminated no-nonsense observation of ultrafast incident laser light e-fields technique（GReNOUILLe）.Numerical simulations in spectral and temporal domains are *** data from the numerical simulations are in good agreement with the experimental *** experimental results and numerical simulations show that pulse collapse is the determining factor in the generation of a blue-shifted supercontinuum.

关键词： femtosecond pulse ultrafast measurement supercontinuum

在线全文

学校读者我要写书评

暂无评论

三段论推理在法律论证中的作用探讨

法制与社会发展 2007年第1期13卷 63-72页

作者：焦宝乾山东大学威海分校法学院山东威海264209

司法三段论这一近代以来占主导地位的法律推理模式,当今的法学家对其提出了诸多批判,法律方法论亦由此从总体上实现了向法律论证理论的转换。但是,三段论推理本身的合理价值依然应当予以承认。在法律论证中,形式方法仍然具有无可替代的... 详细信息

司法三段论这一近代以来占主导地位的法律推理模式,当今的法学家对其提出了诸多批判,法律方法论亦由此从总体上实现了向法律论证理论的转换。但是,三段论推理本身的合理价值依然应当予以承认。在法律论证中,形式方法仍然具有无可替代的作用。法律论证的逻辑有效性对于实际的论证活动依然是个比较重要的评价标准。足见三段论推理在法律论证理论中具有重要意义。可以说,演绎模式的说理规则表达了对于法律论证最低限度的理性要求。在事实与规范相互对应的法律适用观念下,三段论推理继续在法律论证,尤其是在内部证立当中发挥作用。

关键词：法律论证三段论涵摄逻辑有效性

Ground-based and additional science support for SMILe

在线全文

学校读者我要写书评

暂无评论

earth and Planetary Physics 2024年第1期8卷 275-298页

作者： J.A.Carter M.Dunlop C.Forsyth K.Oksavik e.Donovon A.Kavanagh S.e.Milan T.Sergienko R.C.Fear D.G.Sibeck M.Connors T.Yeoman X.Tan M.G.G.T.Taylor K.McWilliams J.Gjerloev R.Barnes D.D.Billet G.Chisham A.Dimmock M.P.Freeman D.-S.Han M.D.Hartinger S.-Y.W.Hsieh Z.-J.Hu M.K.James L.Juusola K.Kauristie e.A.Kronberg M.Lester J.Manuel J.Matzka I.McCrea Y.Miyoshi J.Rae L.Ren F.Sigernes e.Spanswick K.Sterne A.Steuwer T.Sun M.-T.Walach B.Walsh C.Wang J.Weygand J.Wild J.Yan J.Zhang Q.-H.Zhang Planetary Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and environment Beihang UniversityBeijing 100191China Key Laboratory of Space environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and Climate Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Physics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden West Highfield Campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space Flight Center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada eSTeC European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada The Johns Hopkins University Applied Physics Laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden Tongji University Shanghai 200092China Center for Space Plasma Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish Meteorological Institute(FMI) Finland Department of earth and environmental Sciences(Geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada GFZ German Research Centre for Geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic Geophysics University Centre in Svalbard

The joint european Space Agency and Chinese Academy of Sciences Solar wind Magnetosphere Ionosphere Link explorer(SMILe)mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,and simultaneously monitor the auroral response of the Northern Hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety of cadences by additional ground-based and space-based instruments will enable a much greater scientific impact beyond the original goals of the SMILe ***,we describe current community efforts to prepare for SMILe,and the benefits and context various experiments that have explicitly expressed support for SMILe can offer.A dedicated group of international scientists representing many different experiment types and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online SMILe Data Fusion Facility,the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community engagement with the SMILe mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMILe conjunctions missions