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| 1 | A single circular chromosome yeast显示文摘Dear editor,Most of the prokaryotic cells contain a single circular chromosome.In contrast, the eukaryotic cells usually contain multiple linear chromosomes. Recently, we artificially created a single linear chromosome yeast strain SY14 from native 16 chromosomes in a haploid Saccharomyces cerevisiae, which displays minor fitness defects.^1 In this study, we have created a new yeast strain which contains a single circular chromosome and apparently has not been found in nature. | Yangyang Shao Ning Lu Chen Cai Fan Zhou Shanshan Wang Zhihu Zhao Guoping Zhao Jin-Qiu Zhou Xiaoli Xue Zhongjun Qin | 2019 | Cell Research2019，29，1： | 5 |
| 2 | Efficient projected gradient methods for cardinality constrained optimization显示文摘Sparse optimization has attracted increasing attention in numerous areas such as compressed sensing, financial optimization and image processing. In this paper, we first consider a special class of cardinality constrained optimization problems, which involves box constraints and a singly linear constraint. An efficient approach is provided for calculating the projection over the feasibility set after a careful analysis on the projection subproblem. Then we present several types of projected gradient methods for a general class of cardinality constrained optimization problems. Global convergence of the methods is established under suitable assumptions. Finally, we illustrate some applications of the proposed methods for signal recovery and index tracking.Especially for index tracking, we propose a new model subject to an adaptive upper bound on the sparse portfolio weights. The computational results demonstrate that the proposed projected gradient methods are efficient in terms of solution quality. | Fengmin Xu Yuhong Dai Zhihu Zhao Zongben Xu | 2019 | Science China Mathematics2019，62，2： | 2 |
| 3 | High-level expression of a polypeptides encoded by a large segment of the envelope gene of HIV-1 in E-coli by directed evolution显示文摘 | Zhang Yongshu Zhao Zhihu Li Fangguang | 2000 | Biotechnology Letters2000，22，11： | 1 |
| 4 | 200 nm–1000 nm spectra of light emitted in the impact of 40Ar10+ upon Al and Si solid surfaces显示文摘 | Xiao’an Zhang Yongtao Zhao Fuli Li Zhihu Yang Guoqing Xiao Wenlong Zhan | 2003 | Science in China Series G: Physics Mechanics and Astronomy2003，，5： | 1 |
| 5 | Development, formation mechanism and performance evaluation of a reusable viscoelastic surfactant fracturing fluid显示文摘 | YAN Zhihu DAI Caili ZHAO Mingwei | 2016 | J Ind Eng Chem2016，37，： | 1 |
| 6 | The Role of SATB2 in Skeletogenesis and Human Disease显示文摘 | Xiaoying Zhao Zhihu Qu Jennifer Tickner Jiake Xu Kerong Dai Xiaoling Zhang | 2013 | Cytokine and Growth Factor Reviews2013，，： | 1 |
| 7 | High-level expression of a polypeptide encode by a large segment of the envelope gene of HIV-1 in Escherichia coli by directed evolution显示文摘 | Zhang Yongshu Zhao Zhihu Ma qinjun | 2000 | Biotechnol Lett (Netherlands)2000，22，： | 1 |
| 8 | 4-13 Rydberg-to-M-shell X-ray Emission of Hollow Xe Atoms/ions above Metallic Surfaces显示文摘According to the classical over-barrier model[1;2], as a slow highly charged Xeq+ ion approaches a critical distance R =p 2q from the surface with the work function W, it begins to resonantly capture conduction electrons into high Rydberg states (principal quantum number around n q). | Song Zhangyong Yang Zhihu Zhang Hongqiang Shao Jianxiong Cui Ying Zhang Yanping Zhang Xiaoan Zhao Yongtao Chen Ximeng Xiao Guoqing | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
| 9 | X-ray spectra induced by ^(129)Xe^(q+) impacting the metal surface显示文摘Using the slow highly charged ions 129 Xe q+ (q=25,26,27;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic X-ray spectrum is induced.The result shows that as long as the charge state of projectile is high enough,the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak(nA magnitude),and the X-ray yield per ion is in the order of 10-8and increases with the kinetic energy and potential energy of projectile.By measuring the Au Mα-X-ray spectra,Au atomic N-level lifetime is estimated at about 1.33×10-18s based on Heisenberg uncertainty relation. | ZHANG XiaoAn 1,2 ,XIAO GuoQing 1 ,YANG ZhiHu 1 ,CHEN XiMeng 3 ,ZHAO YongTao 1 , LI FuLi 4 ,WANG Li 1,2 ,CUI Ying 3 ,ZHANG HongQiang 3 &ZHAN WenLong 1 1Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 2Department of Physics,Xianyang Normal University,Xianyang 712000,China 3Department of Modern Physics,Lanzhou University,Lanzhou 730000,China 4Department of Applied Physics,Xi’an Jiaotong University,Xi’an 710049,China | 2008 | Science China(Physics,Mechanics & Astronomy)2008，51，1： | 0 |
| 10 | A new meiofauna polychaeta Pholoe(Polychaeta,Sigalionidae) from the Huanghai Sea(YellowSea)显示文摘AnewmeiofaunapolychaetaPholoe(Polychaeta,Sigalionidae)fromtheHuanghaiSea(YellowSea)￥WuBaoling;ZhaoJingandDingZhihu(ReceivedAp... | Wu Baoling Zhao Jing and Ding Zhihu | 1994 | Acta Oceanologica Sinica1994，13，1： | 0 |
| 11 | 4-21 M X-ray Emission of Hollow Xeq+ Atoms above Metallic Surfaces显示文摘A highly charged ion (HCI) has a large potential energy, which is equal to the binding energies of all the elec-trons removed to create the ion. When such a slow HCI approaches and then enters into a solid surface, an \abovethe surface' and a \below the surface' hollow atom will be formed, respectively, by capturing electrons from thesurface into its empty levels. Not only new aspects of atom physics has been introduced by hollow atoms, but alsoHCI applications in material science has promising prospects, such as surface analysis, the synthesis of materialswith new properties, and the formation of nanostructure that have been an active area of research in recent years[1??6]. | Song Zhangyong Yang Zhihu Zhang Hongqiang Shao Jianxiong Cui Ying Zhang Yanping Zhang Xiaoan Zhao Yongtao Chen Ximeng Xiao Guoqing | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 12 | 高电荷态Xeq+离子与Ni表面作用过程中可见光发射的势能效应显示文摘When slow highly charged ions approach and enter the sample,it deposits its energy into the target surface,which leads to atomic particle eject ion.Then some of them in excited states undergo radiative de-excitation resulting in optical emission[1].In order to probe into potential energy effect on optical emission,the measurement of optical emission in the collisions of slow(V0.38 VBohr)highly charged Xeq+(4q20)ions with high purity Ni(99.995%)surface was made. | Xu Qiumei Yang Zhihu Chen Yanhong Zhao Hongyun Zhang Chonghong | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 13 | X-ray Spectra Induced by ^(40)Ar^(17+) Interacting with Au Surface显示文摘When a highly charged ion with many inner shell holes is approaching to a metallic surface, the conducting -band electrons in the metal can resonantly transfer into the high orbits of the projectile at a large distance. In this way, the ion could be temporarily neutralized to form a hollow atom with outer shell occupied and inner shells empty. The hollow atoms may de-excite by auto ionization, Auger electron emission and cascade radioactive X-rays. At the very moment when the projectile reaching the surface, its outer shell electrons will be partly peeled off, however the holes in the inner-most shell could still survive for | Zhang Xiaoan Xiao Guoqing Zhao Yongtao Yang Zhihu Chen Ximeng | 2005 | 近代物理研究所和兰州重离子加速器实验室年报:英文版2005，，1： | 0 |
| 14 | Study of Excited Spectrum and Lifetime for 94MeV Ar Ions显示文摘Study of Excited Spectrum and Lifetime for 94MeV Ar IonsStudyofExcitedSpectrumandLifetimefor94MeVArIons￥WangYoude;LiuHuiping;... | Wang Youde Liu Huiping Yang Zhihu Ma Xinwen Zhao Mengchun Jiang Renbin and Wang winjue | 1995 | IMP & HIRFL Annual Report1995，，0： | 0 |
| 15 | Study of Highly Ionized Atom Ne显示文摘Study of Highly Ionized Atom NeStudyofHighlyIonizedAtomNe￥WangYoude;MaXinwen;LiuHuiping;YangZhihu;ZhaoMengchun;DuYifei;GuoTia... | Wang Youde Ma Xinwen Liu Huiping Yang Zhihu Zhao Mengchun Du Yifei Guo Tianrui and Wang Chunfang | 1995 | IMP & HIRFL Annual Report1995，，0： | 0 |
| 16 | Instability mechanism of mining roadway passing through fault at different angles in kilometre-deep mine and control measures of roof cutting and NPR cables显示文摘The angle α between the fault strike and the axial direction of the roadway produces different damage characteristics. In this paper, the research methodology includes theoretical analyses, numerical simulations and field experiments in the context of the Daqiang coal mine located in Shenyang, China. The stability control countermeasure of 'pre-splitting cutting roof + NPR anchor cable'(PSCR-NPR) is simultaneously proposed. According to the different deformation characteristics of the roadway, the faults are innovatively classified into three types, with α of type I being 0°-30°, α of type II being 30°-60°, and α of type III being 60°-90°. The full-cycle stress evolution paths during mining roadway traverses across different types of faults are investigated by numerical simulation. Different pinch angles α lead to high stress concentration areas at different locations in the surrounding rock. The non-uniform stress field formed in the shallow surrounding rock is an important reason for the instability of the roadway. The pre-cracked cut top shifted the high stress region to the deep rock mass and formed a low stress region in the shallow rock mass. The high prestressing NPR anchor cable transforms the non-uniform stress field of the shallow surrounding rock into a uniform stress field. PSCR-NPR is applied in the fault-through roadway of Daqiang mine. The low stress area of the surrounding rock was enlarged by 3-7 times, and the cumulative convergence was reduced by 45%-50%. It provides a reference for the stability control of the deep fault-through mining roadway. | SUN Xiaoming WANG Jian ZHAO Wenchao MING Jiang ZHANG Yong LI Zhihu MIAO Chengyu GUO Zhibiao HE Manchao | 2024 | Journal of Mountain Science2024，21，1： | 0 |
| 17 | Excitation of Ar by Ar^(7+) Ions Impact at 2.3-3.0keV/u显示文摘Excitation of Ar by Ar^(7+) Ions Impact at 2.3-3.0keV/u￥WangYoude;YangZhihu;MaXinwen;LiuHuiping;ZhaoMengchun;ZhouSixin;LiuZha?.. | Wang Youde Yang Zhihu Ma Xinwen Liu Huiping Zhao Mengchun Zhou Sixin Liu Zhanwen Zhang Wen Zhang Xuezhen Guo Xiaohong Yang Feng Pan Guangyan and Li Dawan | 1994 | IMP & HIRFL Annual Report1994，，0： | 0 |
| 18 | Potential Energy Effect on Optical Emission from GaAs Surface Induced by Slow Highly Charged Xeq^(+)Ions显示文摘GaAs is a direct band gap semiconductor,which makes it a very useful material for the manufacture of light emitting diodes and semiconductor lasers.Ion beam modification is of potential importance for the optical and electronic device technology. | Xu Qiumei Zhang Chonghong Yang Zhihu Chen Yanhong Zhao Hongyun Song Yin | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 19 | Electron Impact Excitation of He^+ Ions in a Crossed Beam Experiment 显示文摘Electron Impact Excitation of He~+ Ions in a Crossed Beam Experiment ￥WandYoude;liuHuiping;ZhaoMengchun;MaXinwen;YangZhihu;Zh?.. | Wand Youde liu Huiping Zhao Mengchun Ma Xinwen Yang Zhihu Zhang Wen Liu Zhanwen Zhou Sixin Zhang Xuezhen Guo Xiaohong Pan Guangyan Li Dawanl and Yang Feng(Institute of Physics, the Chinese Academy of Sciences, Baijing.) | 1994 | IMP & HIRFL Annual Report1994，，0： | 0 |
| 20 | Electron Capture into Excited States in Collision between Li-like N^(4+) Ion and Na Target显示文摘Electron Capture into Excited States in Collision between Li-like N^(4+) Ion and Na Target￥LiuZhanwen;ZhouSixin;ZhangWen;Zhan?.. | Liu Zhanwen Zhou Sixin Zhang Wen Zhang Xuezhen Guo Xiaohong Ma Xinwen Yang Zhihu Liu Huiping Zhao Mengchun Wang Youde Li Dawan Yang Feng and Pan Guangyan(Institute of Physics, the Chinese Academy of Sciences, Beijing.) | 1994 | IMP & HIRFL Annual Report1994，，0： | 0 |
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