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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 | Experimental study on effect of inclination angles to ammonia pulsating heat pipe显示文摘In this paper, a novel study on performance of closed loop pulsating heat pipe(CLPHP)using ammonia as working fluid is experimented. The tested CLPHP, consisting of six turns, is fully made of quartz glass tubes with 6 mm outer diameter and 2 mm inner diameter. The filling ratio is50%. The visualization investigation is conducted to observe the oscillation and circulation flow in the CLPHP. In order to investigate the effects of inclination angles to thermal performance in the ammonia CLPHP, four case tests are studied. The trends of temperature fluctuation and thermal resistance as the input power increases at different inclination angles are highlighted. The results show that it is very easy to start up and circulate for the ammonia CLPHP at an inclining angle.The thermal resistance is low to 0.02 K/W, presenting that heat fluxes can be transferred from heating section to cooling section very quickly. It is found that the thermal resistance decreases as the inclination angle increases. At the horizontal operation, the ammonia CLPHP can be easy to start up at low input power, but hard to circulate. In this case, once the input power is high,the capillary tube in heating section will be burnt out, leading to worse thermal performance with high thermal resistance. | Xue Zhihu Qu Wei | 2014 | Chinese Journal of Aeronautics2014，27，5： | 5 |
| 3 | A New Cultivation-Evolution Technology of Accident Immune Function for a Petrochemical Enterprise显示文摘为在一家石油化学的企业在生产事故上开发一个有免疫力的函数的目的,预防机制的一条新耕作进化途径被分析关于有免疫力的缺乏症候群的各种各样的因素建议,由指免疫,基因算法和相关概念在药science.Accident免疫系统申请了高度危险的石油化学的企业,它由它的生产系统的安全 Organand 安全组织组成,典型地是为有免疫力的功能的进化耕作进步,新 Bimmune 房间在几层的家以后被产生屏蔽,克隆膨胀, receptored iting ,在石油化学的企业在工作事故的免疫系统组织。有有高本能的一个 B 有免疫力的房间,一个功利性的函数作为解决方案作为目标函数和有免疫力的抗体在工业为 accident-immunity.Taking 锁住事故的抗原,作者 scarried 外面为在抗原和抗体之间的本能的预言的一张计算图。 | Yang Zhenhong Zhang Xuhua Wang Xiangyao Wang Zhihu Liu Yank Zhang Xuan | 2007 | China Petroleum Processing & Petrochemical Technology2007，9，1： | 3 |
| 4 | Full visualization and startup performance of an ammonia pulsating heat pipe显示文摘In this paper,a novel study on full visualization and startup performances of pulsating heat pipe using ammonia as working fluid are experimented.The tested pulsating heat pipe,consisting of 6 turns,is fully made of quartz glass tubes with 6 mm outer diameter and 2 mm inner diameter.The filling ratio is 70%.Wall temperature fluctuations of several key positions are recorded under a series charge of heat inputs.The visualization investigation is conducted to observe the oscillations and circulation flows with the advantage of high quality digital video camera,by which the unique thermodynamic behaviors are able to recognize and analyze more easily.The experimental results show that the startup power required by the ammonia Pulsating Heat Pipe(PHP)is very small,owing to particular identities of ammonia.It is observed that there are also some unevenly distributions in slug-train during initial and operating state.Phenomena such as circulation flows and local oscillations coupling breaking up of bubbles and formation of slugs are observed. | Zhihu Xue Wei Qu Minghui Xie | 2013 | Propulsion and Power Research2013，2，4： | 3 |
| 5 | Influence of annealing and spheroidizing treatment on microstructure and mechanical properties of AZ91 magnesium alloy显示文摘The low-strength and high-brittleness of AZ91 cast magnesium alloy mainly result from the coarse divorced eutectic phase.To solve these problems,the annealing treatment of AZ91 cast magnesium alloy was carried out at 415 ℃ and held for 24 h in this study and the alloy was then slowly cooled to room temperature in furnace.The microstructures of the alloy were observed using a metallographic microscope,a transmission electron microscopy and an emission scanning electron microscopy,respectively.The phase analysis was performed using the X-ray diffraction,and the tensile test of the specimen at ambient temperature was performed on a material test machine.The results indicate that the coarse divorced eutectic phase dissolves into the Mg matrix during the isothermal process,and the lamellar β-Mg17Al12 phase precipitates from the magnesium solid solution with a type of pearlite precipitation during furnace cooling.Consequently,the spheroidizing treatment was carried out at 320 ℃ for 20 h following the annealing process and the lamellar β-Mg17Al12 phase was spheroidized.Compared with the as-cast alloy,the strength and ductility of the AZ91 magnesium alloy are increased obviously after annealing treatment;the yield strength and tensile strength are increased to 137.8 MPa and 240.4 MPa from 102.9 MPa and 199.3 MPa,respectively;and the elongation is improved to 6.12% from 4.35%.After being spheroidized,the strength and hardness decrease a little,but the ductility is elevated to 7.23%.The nucleation,growth and spheroidizing mechanism of the lamellar β-Mg17Al12 phase were also discussed. | Zhang Jumei Wang Zhihu Jiang Bailing Chen Zishan | 2013 | China Foundry2013，10，1： | 3 |
| 6 | 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 |
| 7 | Asymmetricalπback-donation of hetero-dicationic Mo^(4+)-Mo^(6+)pairs for enhanced electrochemical nitrogen reduction显示文摘The breaking of nonpolar N≡N bond of dinitrogen is the biggest dilemma for electrocatalytic nitrogen reduction reaction(NRR)application,driving electron migration between catalysts and N≡N bond(termed“πback-donation”process)is crucial for attenuating interfacial energy barrier but still remains challenging.Herein,using density functional theory calculations,we revealed that constructing a unique hetero-dicationic Mo^(4+)-Mo^(6+)pair could effectively activate N≡N bond with a lying-down chemisorption configuration by an asymmetrical“πback-donation”process.As a proof-of-concept demonstration,we synthesized MoO_(2)@MoO_(3)heterostructure with double Mo sites(Mo^(4+)-Mo^(6+)),which are embedded in graphite,for electrochemical nitrogen reduction.Impressively,this hetero-dicationic Mo^(4+)-Mo^(6+)pair catalysts display more excellent catalytic performance with a high NH_(3)yield(60.9μg·h^(-1)·mg^(-1))and Faradic efficiency(23.8%)as NRR catalysts under ambient conditions than pristine MoO_(2)and MoO_(3).Operando characterizations using synchrotron-based spectroscopic techniques identified the emergence of a key^(*)N_(2)Hy intermediate on Mo sites during NRR,which indicates that the Mo sites are active sites and the NRR process tends to follow an associative mechanism.This novel type of hetero-dicationic catalyst has tremendous potential as a new class of transition metal-based catalysts with promising applications in electrocatalysis and catalysts for energy conversion and storage. | Hao Tan Qianqian Ji Chao Wang Hengli Duan Yuan Kong Yao Wang Sihua Feng Liyang Lv Fengchun Hu Wenhua Zhang Wangsheng Chu Zhihu Sun Wensheng Yan | 2022 | Nano Research2022，15，4： | 2 |
| 8 | Geo-localization based on CNN feature matching显示文摘A geo-localization method is proposed for military and civilian applications, which is used when no global navigation satellite system(GNSS) information is available. The open graphics library(Open GL) is used to build a three-dimensional geographic model of the test area using digital elevation model(DEM) data, and the skyline can thus be extracted with the model to form a database. Then, Multi Skip Deep Lab(MS-Deep Lab), a fully convolutional semantic segmentation network with multiple skip structures, is proposed to extract the skyline from the query image. Finally, a matching model based on convolutional neural network(CNN) feature is adopted to calculate the similarity between the skyline features of the query image and the DEM database to realize automatic geo-localization. The experiments are conducted at a 202.6 kmtest site in north-eastern Changsha, China. 50 test points are selected to verify the effectiveness of the proposed method, and an excellent result with an average positioning error of 49.29 m is obtained. | TANG Jin GONG Cheng GUO Fan YANG Zirong WU Zhihu | 2022 | Optoelectronics Letters2022，18，5： | 2 |
| 9 | Late Quaternary terrigenous sedimentation in the Western Arctic Ocean as exemplified by a sedimentary record from the Alpha Ridge显示文摘Terrigenous components in sediment core B84A from the Alpha Ridge,Western Arctic Ocean,have been investigated to reconstruct Mid to Late Quaternary variations in sedimentation,provenance,and related climate changes. The core stratigraphy,evaluated by a combination of variations in Mn content,color cycles,foraminiferal abundance,and lithological correlation,extends back to estimated Marine Isotope Stage 12. Twelve Ice Rafted Detritus(IRD,>250 μm) events were identified and interpreted to mostly occur during deglaciation.The Canadian Arctic,which was covered by ice sheets during glacial periods,is suggested to be the major source region. The IRD events likely indicate the collapses of ice sheets,possibly in response to abrupt climate changes.Grain size analysis of B84A indicates sedimentologically sensitive components in core B84A in the 4-9 μm and 19-53 μm silt subfractions,which are inferred to be mainly transported by currents and sea ice,respectively. Down core variability of these two fractions may indicate changes in ice drift and current strength. In accordance with previous studies in the central Arctic Ocean,the average sedimentation rate in core B84A is about 0.4 cm·ka-1.Compared with the relatively high sedimentation rates on the margins,sedimentation in the central Arctic Ocean is limited by sea ice cover and the correspondingly low bioproductivity,as well as the long distance from source regions of terrigenous sediment. | LIU Weinan WANG Rujian CHEN Jianfang CHENG Zhenbo CHEN Zhihu SUN Yechen | 2011 | Advances in Polar Science2011，22，4： | 1 |
| 10 | Extracoelomic approach to the spine显示文摘 | Benson D Zhihu Zhang | 1993 | J BJS (Br)1993，75，： | 1 |
| 11 | Modelling and Spherical Air Bearing Based Levitation Design of a Novel M-DOF Actuator 显示文摘 | Zheng Li Zhihu Guo | 2012 | Przeglad Elektrotchniczny2012，88，11： | 1 |
| 12 | 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 |
| 13 | FoxOs Cooperatively Regulate Diverse Pathways Governing Neural Stem Cell Homeostasis显示文摘 | Ji-hye Paik Zhihu Ding Rujuta Narurkar Shakti Ramkissoon Florian Muller Walid S. Kamoun Sung-Suk Chae Hongwu Zheng Haoqiang Ying Jed Mahoney David Hiller Shan Jiang Alexei Protopopov Wing H. Wong Lynda Chin Keith L. Ligon Ronald A. DePinho | 2009 | Cell Stem Cell2009，，5： | 1 |
| 14 | Outlier detection based on similar flocking model in wireless sensor networks 显示文摘 | Cheng Chunling Wu Hao Yu Zhihu | 2013 | Interna- tional Journal on Smart Sensing and Intelligent Systems2013，6，1： | 1 |
| 15 | Delay - dependent dissipative control for linear time - delay systems 显示文摘 | Li Zhihu Wang Jingcheng Shao Hulhe | 2002 | Journal of The Franklin Institute2002，339，： | 1 |
| 16 | Effects of (NH4 )2S04 on the characteristics of the deposits and properties of an electroless Ni-P plating solution 显示文摘 | ZHIHU Xie GANG Yu BONIAN Hu | 2001 | Applied Surface Science2001，257，： | 1 |
| 17 | Grain Growth Phenomena in the Interface Region of α‐Alumina Bilayer Composites显示文摘 | HongZhao Xiao‐ZhiHu Mark B.Bush | 2004 | Journal of the American Ceramic Society2004，，8： | 1 |
| 18 | Ultrahigh-temperature ferromagnetism in MoS_(2) Moirésuperlattice/graphene hybrid heterostructures显示文摘Realizing high-temperature ferromagnetism in two-dimensional(2D)semiconductor nanosheets is significant for their applications in next-generation magnetic and electronic nanodevices.Herein,this goal could be achieved on a MoS_(2) Moirésuperlattice grown on the reduced graphene oxide(RGO)substrate by a hydrothermal approach.The as-synthesized bilayer MoS_(2) superlattice structure with rotating angle(ϕ=13°±1°)of two hexagonal MoS_(2) lattices,possesses outstanding ferromagnetic property and an ultra-high Curie temperature of 990 K.The X-ray absorption near-edge structure and ultraviolet photoelectron spectroscopies combined with density functional theory calculation indicate that the covalent interactions between MoS_(2) Moirésuperlattice and RGO substrate lead to the formation of interfacial Mo-S-C bonds and complete spin polarization of Mo 4d electrons near the Fermi level.This design could be generalized and may open up a possibility for tailoring the magnetism of other 2D materials. | Liang Cai Hengli Duan Qinghua Liu Chao Wang Hao Tan Wei Hu Fengchun Hu Zhihu Sun Wensheng Yan | 2021 | Nano Research2021，14，11： | 1 |
| 19 | Delay-dependent dissipative control for linear time-delay systems 显示文摘 | LI Zhihu WANG Jingeheng SHAO Huihe | 2002 | Journal of the Franklin Institute2002，339，： | 1 |
| 20 | Electron Emission Characteristics of Al-AlN Granular Films 显示文摘 | Liang Haifeng Liu Chunliang Liang Zhihu | 2008 | Applied Surface Science2008，254，21： | 1 |
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