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Approximation analytical solutions for a unified plasma sheath model by double decomposition method

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Nuclear Science and Techniques 1998年第4期9卷 193-197页

作者： Fang Jin-Qing (china institute of atomic energy beijing 102413.

A anified plasma sheath model and its potential equation are proposed. Any higher-ordor-approximation analytical solutions for the unified plasma sheath potential equa tiop are derived by double decomposition method.

关键词：等离子体屏蔽模型双分解方法近似分析

Integrated Numerical Experiment of an Intense RF Linac for CIAE Far-Infrared FEL

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Chinese journal of nuclear physics 1997年第2期19卷 121-127页

作者： Fu Shinian Chen Yinbao Huang Zhibin china institute of atomic energy,P.O.Box 275(17),beijing 102413 中国原子能科学院北京

An L band RF linac is now under installation at CIAE to provide intense electronbeam for a far-infrared free-electron laser *** linac consists of a DC thermionicgun,a subharmonic prebuncher,a buncher,an accelerating section and a beam transport *** the INEX(Integrated Numerical Experiment)conducted for prediction of the perfor-mance of the complex and the comparison of some of the simulation results with available ex-perimental data,it shows that the beam quality can satisfy our FEL requirements.

关键词： RF linac Free electron laser Integrated numerical experiments

STUDY OF PHASES IN U-10wt%Zr ALLOY BY NEUTRON DIFFRACTION

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Acta Metallurgica Sinica(English Letters) 1995年第3期8卷 174-180页

作者： XIE Guoqiang YANG Jijian ZHANG Baisheng LI Wendan(china institute of atomic energy, beijing) china Inst of atomic energy Beijing China

U 10wt%Zr alloy has been analysed by neutron diffraction method to determine the constituent phases and their crystal *** collected diffraction data are processed using Rietveld' s profile technique (with program“ Fullprof ”). Four phases,α-U,δ, γand α Zr, in the alloy at room temperature and the corresponding volume fractions as well their structural parameters are obtained from the data analysis, For the δ-phase, a partially ordered unusual hexagonal structure of the modified C32(AlB2) type is confirmed.

关键词： U-10wt%Zr alloy neutron diffraction δ-phase

Brownian ratchets driven by flashing noise strength

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Chinese Science Bulletin 1999年第21期44卷 1956-1961页

作者： ZHAO Tongjun, ZHAN Yong, ZHUO Yizhong and WU XizhenDepartment of Applied Mathematics and Physics , hebei University of Technology , Tianjin 300130, china china institute of atomic energy, beijing 102413. china institute of Theoretical Physics, Chinese Academy of Sciences , beijing 100080, china Corresponding author Dept. of Appl. Math. and Physics Hebei University of Technology Tianjin 300130 China china institute of atomic energy Beijing 102413 China institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China

The stochastic transport driven by flashing multi-noise sources in a ratchet is studied. The stationary current versus the noise strength and the colored noise correlated time T is obtained . At a fixed flip rate and strength of the colored noises, the novel phenomenon of the current reversal occurs as T reaches a certain value. More than one reversal point exists when

关键词： flashing force ratchet current reversal Langevian equation.

Knockdown of neuronal DAF-15/Raptor promotes healthy aging in ***

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Journal of Genetics and Genomics 2024年第5期51卷 507-516页

作者： Xiao Zang Qi Wang hanxin Zhang Yiyan Zhang Zi Wang Zixing Wu Di Chen Model Animal Research Center of Medical School Nanjing UniversityNanjingJiangsu 210061China Zhejiang University-University of Edinburgh institute School of MedicineZhejiang UniversityHainingZhejiang 314400China Department of Colorectal Surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310058China

The highly conserved target of rapamycin(TOR)pathway plays an important role in aging across *** studies have established that inhibition of the TOR complex 1(TORC1)significantly extends lifespan in Caenorhabditis ***,it has not been clear whether TORC1 perturbation affects aging in a spatiotemporal ***,we apply the auxin-inducible degradation tool to knock down endogenous DAF-15,the *** ortholog of regulatory associated protein of TOR(Raptor),to characterize its roles in *** or tissue-specific inhibition of DAF-15 during development results in various growth defects,whereas neuron-specific knockdown of DAF-15 during adulthood significantly extends lifespan and *** neuronal DAF-15 deficiency-induced longevity requires the intestinal activities of DAF-16/FOXO and PHA-4/FOXA transcription factors,as well as the AAK-2/AMP-activated protein kinaseαcatalytic *** profiling reveals that the neuronal DAF-15 knockdown promotes the expression of genes involved in *** findings define the tissue-specific roles of TORC1 in healthy aging and highlight the importance of neuronal modulation of aging.

关键词： Aging targetof rapamycin DAF-15 DAF-16 C.elegans

Track Fading and Its Applications in Archaeology, Tectonics and Geothermal Chronology in china

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Journal of Earth Science 2013年第4期24卷 645-651页

作者：郭士伦袁万明陈宝流黄慰文刘顺生 Department of Nuclear Physics China Institute of Atomic Energy School of Earth Sciences and Resourses China University of Geosciences Department of Radioisotopes China Institute of Atomic Energy institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Guangzhou institute of Geochemistry Chinese Academy of Sciences

Track fading is a basic phenomenon in track science and has been the source of informa- tion in geosciences. This article summarizes the knowledge of track fading and gives some examples of successful applications of track fading in archaeology, tectonics and geothermal chronology in china. The applications of track fading are classified into 5 modes：（1） mode of complete fading （annealing）; （2） mode of partial fading; （3） use of the dependence of track fading on time and temperature; （4） use of the differences of track fading between coexisting minerals; and （5） use of fading-reduced track length. Track fading mechanisms hints that scientists in geothermal chronology should adopt microprobes for quantitative elemental analysis to determine the detailed chemical compositions of each mineral grain or at least of the grains from each position of geological structures in order that one becomes well aware of the relation between the track fading behavior and chemical compositions of the mineral used.

关键词： track fading archaeology tectonics geothermal chronology.

CHARACTERISTICS　OF　The　FRACTALS　APPEARED　ON　ALUMINIUM　FOIL　IRRADIATED　BY　INTENSE　RELATIVISTIC　ELECTRON　BEAM

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中国科学院大学学报(中英文) 1995年第1期 27-40页

作者： Gao Huai-lin Pan Yu-li (china institute of atomic energy, beijing 102413.

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关键词： fractal fractal dimension inertial confinement fusion

Correlations Between the Conditional Moments in ^(16)O and ^(32)S Fragmentation at High energy

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Chinese journal of nuclear physics 1995年第1期17卷 13-16页

作者： Liu Fu-hu (institute of High energy Physics,Chinese Academy of Sciences,beijing 100039)Sun Han-cheng (china institute of atomic energy,B.O.Box 275(94),beijing 102413. institute of High energy Physics Chinese Academy of Sciences Beijing 100039 asteur.fr

The conditional moments of the charge distributions of the projectile frag-ments in 16O and 32S fragmentation behaviour are obtained by using a partition *** logarithmic correlations between the conditional moments are observed,Thecalculated results are in agreement with the experimental data of 3.7 and 200GeV N 16O-emulsion and 200 GeV/N 32S-emulsion interactions.

关键词： Projectile fragment Charge distribution Conditional moment Logarithmic correlation

Optimal reactions for the synthesis of superheavy nucleus ^(270)Hs

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Science china(Physics,Mechanics & Astronomy) 2006年第6期49卷 641-648页

作者： LIU Zuhua1,3 & BAO Jingdong1,2 1. Key Laboratory of Beam Technology and Material Modification of Ministry of Education, beijing Normal University, beijing 100875, china 2. Physics Department, beijing Normal University, beijing 100875, china 3. china institute of atomic energy, beijing 102413. china Key Laboratory of Beam Technology and Material Modification of Ministry of Education Beijing Normal University Beijing China china institute of atomic energy Beijing China Physics Department Beijing Normal University Beijing China

The superheavy nucleus 270Hs is expected to be a “double-magic” deformed nucleus. We have calculated its cross sections of evaporation residue for the reactions 248Cm(26Mg,4n)270Hs, 244Pu(30Si,4n)270Hs, 238U(36S,4n)270Hs and 226Ra(48Ca,4n)270Hs using a two-parameter Smoluchowski equation. It is found from our results that 226Ra(48Ca,4n)270Hs and 238U(36S,4n)270Hs are two optimal reactions for the synthesis of the superheavy nucleus 270Hs due to their large negative Q-values.

关键词： diffused fusion barrier,Smoluchowski equation,superheavy nuclei.