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Heavy ion reactions around the Coulomb barrier

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中国科学：物理学、力学、天文学英文版 2011年第S1期54卷 6-13页

作者： ZHANG HuanQiao1, LIN ChengJian1, JIA HuiMing1, ZHANG ChunLei1,2, ZHANG GaoLong1,3, YANG Feng1, LIU ZuHua1, AN GuangPeng1, WU ZhenDong1, XU XinXing1 & JIA Fei1 1 China institute of Atomic Energy, P. O. box 275(10), Beijing 102413, China 2 Particle Astrophysics Center, institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China 3 School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China 1. China institute of Atomic Energy P. O. Box 275(10) Beijing 102413 China2. Particle Astrophysics Center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 China3. School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China

The angular distributions of fission fragments for the 32S+184W reaction near Coulomb barrier energies are measured. The ex perimental fission excitation function is obtained. The measured fission cross sections are decomposed into fusion-fission, quasi-fission and fast fission contributions by the dinuclear system (DNS) model. The hindrance to completing fusion both at small and large collision energies is explained. The fusion excitation functions of 32S+90,96Zr in an energy range from above to below the Coulomb barrier are measured and analyzed within a semi-classical model. The obvious effect of positive Q-value multi-neutron transfers on the sub-barrier fusion enhancement is observed in the 32S+96Zr system. In addition, the excitation functions of quasi-elastic scattering at a backward angle have been measured with high precision for the systems of 16O+208Pb, 196Pt, 184W, and 154,152Sm at energies well below the Coulomb barrier. Considering the deformed coupling effects, the extracted diffuseness parameters are close to the values extracted from the systematic analysis of elastic and inelastic scattering data. The elastic scattering angular distribution of 17F+12C at 60 MeV is measured and calculated by using the continuum-discretized coupled-channels (CDCC) approach. It is found that the diffuseness parameter of the real part of core-target potential has to be increased by 20% to reproduce the experimental result, which corresponds to an increment of potential depth at the surface re gion. The breakup cross section and the coupling between breakup and elastic scattering are small.

关键词： fusion-fission quasi-fission fusion hindrance fusion enhancement surface diffuseness parameter exotic nuclei

Combined Pollution and Pollution Index of Heavy Metals in Red Soil

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Pedosphere 2000年第2期10卷 117-124页

作者： CHEN HUAIMAN ZHENG CHUNRONG WANG SHENQIANG and TU CONG(institute of Soil Science, the Chinese Academy of Sciences, P.O. box 821, Naroing 210008 China) 中科院南京土壤所江苏南京 210008

A field experiment was conducted to study the effects of Pb, Cd, Cu, Zn and As coexisting in red soilon growth of rice (Oryza sativa L.), mung bean (Vigna rabiata (Linn.) Wilczek), alfalfa (Medicago sativaL.), slash pine (Pinus elliottii Engelm.) and aspen (Populus L.). Results showed that rice, mung bean andalfalfa were significantly innuenced by combined pollution of the heavy metals. The contents of Pb, cd andAs in rice grains greatly exceeded the National Standards for Food Hygiene of China. Heavy metals at ahigh concentration seriously retarded growth of mung bean and alfalfa, but not so obviously with slash pineand aspen. The composite index is suggested for evaluating the relativity of combined pollution witll heavymetals in soil.

关键词： combined pollution composite pollution index plant growth red soil

Physiological Mechanism of High and Stable Yield of No-tillage Cast-transplanted rice

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Agricultural Sciences in China 2002年第4期1卷 404-409页

作者： LIU Jun, HUANG Qing, FU Hua, LU Xiu-ming, LIU Huai-zhen and LI Kang-huo( rice research institute , Guangdong Academy of Agricultural Sciences , Guangzhou 510640 , P.R. China) rice research institute Guangdong Academy of Agricultural Sciences Guangzhou 510640 P. R . China

Four years' successive comparative experiments showed that no-tillage cast-transplanted rice (NTCTR), compared with conventional tillage cast-transplanted rice (CK), grew slower and produced less tillers at the early growing stage; but, it had shorter ineffective tillering time, less nutrition consumption, stronger individual growth and more uniform growth between individuals and the colony. These characteristics contribute to the increase not only in the productive tiller percentage but also in the ear quality. Furthermore, the flag leaf of NTCTR had higher photosynthetic rate during the filling stage and no early senescence phenomenon at the late stage, which facilitated the accumulation and the transportation of carbohydrates and improved grain setting rate.

关键词： rice No-tillage cast-transplanted rice(NTCTR) Physiology

Study of D^0-D^0 mixing at a giga-Z linear collider

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Science China(Physics,Mechanics & Astronomy) 2010年第11期53卷 1953-1956页

作者： LI HaiBo 1 & YANG MaoZhi 2 1 institute of High Energy Physics,P.O.box 918,Beijing 100049,China 2 School of Physics,Nankai University,Tianjin 300071,China institute of High Energy Physics Beijing China School of Physics Nankai University Tianjin China

The possibility of studying D 0-D 0 mixing at a giga-Z linear collider "Z factory" where 10 9 hadronic Z 0 decays can be accumulated is *** discuss the sensitivity for the measurements of neutral D mixing *** results are compared to those attainable at B *** find that the typical decay length of the neutral D mesons at Z factory is about 10 times larger than that at B *** addition,the resolution of the vertex detector of a giga-Z factory is 2-3 times better than that of B *** proper time resolution at Z factory is about 20-30 times better than that at B *** the determination of the mixing parameters at a giga-Z factory is more precise.

关键词： Z factory D0 mesons mixing B factory

A WUSCHEL-like homeobox gene,OsWOX3B responses to NUDA/GL-1 locus in rice

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A WUSCHEL-like homeobox gene,OsWOX3B responses to NUDA/GL-1 ...

A STUDY ON DYNAMIC CHARACTERISTICS OF UNIFORMLY SUSPENDED CABLE USING GALERKIN METHOD

从植物科学到农业发展——2012全国植物生物学大会

作者： Honglei Zhang~(1*),Kun Wu~(2*),Yufeng Wang~1,Yu Peng~1,Fengyi Hu~3,Lu Wen~4, Bin Han~1,Qian Qian~2,Sheng Teng~1 1 Shanghai institute of Plant Physiology and Ecology,Shanghai institute for Biological Sciences,The Chinese Academy of Sciences,Shanghai 200032,China 2 State Key Laboratory of rice Biology,China National rice research institute,Chinese Academy of Agricultural Sciences,Hangzhou,310006,China 3 institute of Food Crops,Yunnan Academy of Agricultural Sciences,Kunming 650205,China 4 Puer Agricultural research institute,Puer 66500,China.

In this study,the "Nuda" phenotype in Yunnan Nuda rice,a glabrous cultivar that constitutes approximately 20%of rice germplasms in Yunnan,China,was found to be controlled by a single recessive allelic gene within the well-characterized GL-1 locus.A high-resolution genetic and physical map was constructed using 1,192 Nuda individuals from the F population that was delivered from the cross between the Yunnan Nuda variety HMK and the pubescent TN1 *** NUDA/GL-1 gene was mapped to a 28.5 kb region containing six annotated genes based on the Nipponbare genomic *** comparing the sequences and expression patterns of different pubescent and glabrous varieties,LOCs05g02730,a WUSCHEL-like homeobox gene(OsWOX3) was identified as the candidate *** hypothesis was confirmed by RNA interference(RNAi) and transgenic *** deficiency in RNAi lines was associated with increased efficiency of grain packaging but did not affect the main agronomic traits.

关键词： Yunnan Nuda rice Nuda/glabrous map-based cloning WUSCHEL-like homeobox gene OsWOXSB.

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A STUDY ON DYNAMIC CHARACTERISTICS OF UNIFORMLY SUSPENDED CA...

Asia-Pacific Conference on Shell and Spatial Structures

作者： ZHAO JIDA institute of Building Structures China Academy of Building research P.O.box 752 Beijing China

＜正＞The cable force varies with the suspended cable vibrating at its symmetric modes,hence it is not accurate enough to adopt a single sinusoidai function to describe its modes,especially in the first few *** this paper,a series of sinusoidal functions are used to approximate the vibration mode function,and the modes and frequencies of cable are solved by Garlerkin *** practical purpose a simplified formula of the above solution is *** demonstrate the accuracy of solution,a numerical comparison is carried out between the results from proposed method,the continuous transcendental equation method and the non-linear finite element tangent stiffness method. Finally,the dynamic characteristics of the cable are discussed and some useful conclusion are given.

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早晚稻品种间杂交生育期的遗传变异

Journal of Genetics and Genomics 1977年第2期 125-132页

作者： Division of rice-breeding, rice research institute, Hunan Agricultural Academy 湖南省农业科学院水稻研究所育种组

在毛主席的无产阶级革命路线指引下,随着农业学大寨运动的不断深入发展,农业机械化的逐步实现,耕作制度的大改革,以及粮食产量大幅度的提高,对水稻良种提出了更高的要求,特别是对晚稻品种要求更加迫切,选育晚稻早熟高产品种就成为当前... 详细信息

在毛主席的无产阶级革命路线指引下,随着农业学大寨运动的不断深入发展,农业机械化的逐步实现,耕作制度的大改革,以及粮食产量大幅度的提高,对水稻良种提出了更高的要求,特别是对晚稻品种要求更加迫切,选育晚稻早熟高产品种就成为当前亟待解决的问题。

关键词：生育期自然光照早晚稻品种间杂交遗传变异不定变异晚稻品种

Genetic analysis and fine mapping of tms9,a novel thermo-sensitive genic male sterile gene in rice(Oryza sativa L.)

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Genetic analysis and fine mapping of tms9,a novel thermo-sen...

The radiative lifetime and the optical absorption cross section measurements of neodymium

2012年中国作物学会学术年会

作者： Zhonghua Sheng 1,2,Xiangjin Wei1,Gaoneng Shao1,Mingliang Chen 1,Jian Song1,Shaoqing Tang 1,Ju Luo1,Yichao Hu2,Peisong Hu 1,3,Liyun Chen2,3 1 China National rice research institute,Hangzhou 311400,China 2 rice research institute,Hunan Agricultural University,Changsha 410128,China

Two-line hybrid rice as a novel hybrid breeding method has huge potentiality for yield increasing and utilization of intersubspecific heterosis,it is of great significance for the nation’s food security in *** 1S is a thermo-sensitive genic male sterile line of rice with low critical temperature and excellent combing ability,which has been widely applied as a female parent in two-line hybrid rice breeding *** this study,three F2 populations were used to investigate the fertility segregation patterns,the results indicated that the thermo sensitive genic male sterility of Zhu1S is controlled by a pair of recessive nuclear sterile gene.A high-resolution linkage analysis which was based on the Zhu1S/R173 F2 population found that the thermo sensitive genic male sterile gene tms9 of Zhu1S was fine mapped on the short arm of chromosome 2 between insertion-deletion(Indel) markers Indel37 and Indel57,the genetic distance from the tms9 to the two markers were 0.12 and 0.31 cM,*** physic distance between the two markers is about 107.2 *** annotation databases showed that the two In-del markers(Indel 37 and Indel 57) were located on two BAC clones(B1307A11 and P0027A02).There are sixteen Open Reading Frames(ORF) present in this *** results of this study are of great significance for further cloning tms9 and molecular marker assisted selection.

关键词： thermo-sensitive genic male sterile gene-tms9-fine mapping-rice

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Chinese Journal of Lasers 1993年第5期 65-71页

作者： Huang Wu, Wenjie Pan, Pinfang Xu, Xiangdong Xu.Lin Fei, Guiming Yu, Ziwei Li, Xin Wang( 3rd Department, research institute of Physical and Chemical Engineering , P.O.box (7) 77, Tianjin 300180, China)

Using the technique of laser induced fluorescence, we have obtained the experimental results that the radiative lifetime of the ~7K3~o state and the optical absorption cross section of the transition ~5I4~e→~7K3~o of... 详细信息

关键词： lifetime optical absorption cross section neodymium