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Structure of a histone hexamer bound by the chaperone domains of SPT16 and MCM2

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Science china(Life sciences) 2024年第6期67卷 1305-1307页

作者： Songlin Gan wen-si Yang Liting wei Zhiguo Zhang Rui-Ming Xu Key Laboratory of Epigenetic Regulation and Intervention Institute of BiophysicsChinese Academy of SciencesBeijing 100101China School of Life sciences University of Chinese Academy of SciencesBeijing 100049China institute for Cancer Genetics Department of Pediatrics and Department of Genetics and DevelopmentColumbia University Irving Medical CenterNew York 10032USA School of Life Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Dear Editor,The passage of DNA replication forks during eukaryotic cell division disrupts the nucleosomes they encounter,and de novo assembly of nucleosomes onto replicated DNA must take place to restore chromatin ***... 详细信息

关键词： structure nucleosome passage

The First Ground-based White Light Lunar Polarization Imaging:A New Kind of FeO Observation on the Near side of the Moon

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Research in Astronomy and Astrophysics 2024年第6期24卷 1-6页

作者： wei-nan Wang Jin-Song Ping Ming-Yuan Wang {2.-Zhao Zhang Han-Lin Ye Xing-wei Han Song-Feng Kou Changchun Observatory National Astronomical ObservatoriesChinese Academy of SciencesChangchun 130117China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of chinese academy of {2. Beijing 101408China Astronomy Department Beijing Normal UniversityBeijing 100875China International Center for Climate and Environment sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China nanjing institute of Astronomical Optics and Technology Chinese Academy of SciencesNanjing 210042China

Lunar optical polarization is a fascinating phenomenon that occurs when sunlight reflects off the surface of the Moon and becomes *** study employs a novel split-focus plane polarimetric camera to conduct the initial white light polarimetric observations on the near side of the *** obtained the linear degree of polarization(DOP)parameters of white light by observation from the eastern and western hemispheres of the *** findings indicate that the white light polarization is lower in the lunar highland than in the lunar maria *** the analysis of lunar soil samples,we noticed and determined that the DOP parameters of white light demonstrate high consistency with iron oxide on the *** study may serve as a new diagnostic tool for the Moon.

关键词： techniques:photometric polarization methods:observational Moon

Interfacial Oxygen Octahedral Coupling-Driven Robust Ferroelectricity in Epitaxial Na_(0.5)Bi_(0.5)TiO_(3.Thin Films

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Research 2024年第2期2023卷 149-157页

作者： Haojie Han Qinghua Zhang wei Li Yiqun Liu Jiasheng Guo Yue Wang Qian Li Lin Gu Ce-wen {2. Jing Ma State Key Laboratory of New Ceramics and Fine Processing Schoolof Materials Science and EngineeringTsinghua UniversityBeijing 100084China beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

The oxygen octahedral rotation(OOR)forms fundamental atomic distortions and symmetries in perovskite oxides and definitely determines their properties and ***,epitaxial strain and interfacial structural coupling engineering have been developed to modulate the OOR patterns and explore novel properties,but it is difficult to distinguish the 2.***,different symmetries are induced in Na_(0.5)Bi_(0.5)TiO_(3.(NBT)epitaxial films by interfacial oxygen octahedral coupling rather than epitaxial *** NBT film grown on the Nb:SrTiO_(3.substrate exhibits a paraelectric tetragonal phase,while with La_(0.5)Sr_(0.5)MnO_(3.as a buffer layer,a monoclinic phase and robust ferroelectricity are obtained,with a remanent polarization of 42.C cm^(-2.and a breakdown strength of 7.89 MV cm^(-1),which are the highest record among NBT-based ***,the interfacial oxygen octahedral coupling effect is demonstrated to propagate to the entire thickness of the film,suggesting an intriguing long-range *** work provides a deep insight into understanding the structure modulation in perovskite heterostructures and an important avenue for achieving unique functionalities.

关键词： effect. interfacial coupling

Cloud-Model-Based Feature Engineering to Analyze the Energy-Water Nexus of a Full-Scale Wastewater Treatment Plant

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Engineering 2024年第5期36卷 63-75页

作者： Shan-Shan Yang Xin-Lei Yu Chen-Hao Cui Jie Ding Lei He wei Dai Han-Jun Sun Shun-wen Bai Yu Tao Ji-wei Pang {3.-Qi Ren State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150000China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Civil and Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China china Energy Conservation and Environmental Protection Group Beijing 100089China

Wastewater treatment plants(WWTPs)are important and energy-intensive municipal *** energy consumption and relatively low operating performance are major challenges from the perspective of carbon ***,water-energy nexus analysis and models for WWTPs have rarely been reported to *** this study,a cloud-model-based energy consumption analysis(CMECA)of a WWTP was conducted to explore the relationship between influent and energy consumption by clustering its influent’s *** principal component analysis(PCA)and K-means clustering were applied to classify the influent condition using water quality and volume *** energy consumption of the WWTP is divided into five standard evaluation levels,and its cloud digital characteristics(CDCs)were extracted according to bilateral constraints and golden ratio *** results showed that the energy consumption distribution gradually dispersed and deviated from the Gaussian distribution with decreased water concentration and *** days with high energy efficiency were extracted via the clustering method from the influent category of excessive energy consumption,represented by a compact-type energy consumption distribution curve to identify the influent conditions that affect the steady distribution of energy *** local WWTP has high energy consumption with 0.3.13.kW·h·m^(-3.despite low influent concentration and volumes,across four consumption levels from low(I)to relatively high(IV),showing an unsatisfactory operation and management *** average oxygenation capacity,internal reflux ratio,and external reflux ratio during high energy efficiency days recognized by further clustering were obtained(0.2.2.-0.3.03.kg O_(2.·m^(-3.,1.9576-2.4787,and 0.6603.0.83.1,respectively),which could be used as a guide for the days with low energy ***,this study offers a water-energy nexus analysis method to identify influent conditions with operational manageme

关键词： Wastewater treatment plants Cloud-model theory Data mining Principal component analysis K-means clustering Cloud-model-based energy consumption analysis

Another ID-Based Proxy signature Scheme and Its Extension

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Wuhan University Journal of Natural sciences 2007年第1期12卷 33-36页

作者： ZHANG Jianhong1,2., ZOU wei3.1. College of Science, North china University of Technology, {2. 100041,china 2. institute of software of chinese academy of sciences /State Key Laboratory of Information Security, beijing 100080, china 3. institute of Computer Science and Technology, Peking University, {2. 100871, china College of Science North China University of Technology Beijing China State Key Laboratory of Information Security Institute of Software of Chinese Academy of Sciences Beijing China institute of Computer Science and Technology Peking University Beijing China

So fur, the security of many proxy signatures has seldom been considered in a formal way and most of them cannot satisfy nonepudiation. In this work, a novel ID-based （Identity-based） proxy signature scheme is proposed by combining the proxy signature with ID-based public cryptography, and they formalize the notion of security for ID-based proxy signature schemes. And show that the security of the proposed scheme is secure. Compured with other proxy signature schemes, it does not need a secure channel. Thus, it is particularly suitable for the unreliable network computation environment. Finally, they extend proposed scheme to a proxy multi-signature which has the following advantages （1） the size of proxy multi- signature is independent of the number of delegating users; （2. the computation cost of proxy multi-signature only need two weil paring.

关键词： proxy signature multisignature security proof

Applying dynamic light scattering to investigate the self-assembly process of DNA nanostructures

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chinese Chemical Letters 2024年第3期35卷 316-320页

作者： wei Yuan Gui-Zhi Dong Hui Ning Xiang-Xiang Guan Jia-Feng Cheng Zi-wei Shi Xiu-Ji Du si-{2. Meng Dong-Sheng Liu Yuan-Chen Dong CAS Key Laboratory of Colloid Interface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of chinese academy of {2. Beijing 100049China Dandong Bettersize Instruments Ltd. Dandong 118000China Key Laboratory of Organic Optoelectronics&Molecular Engineering of the Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China Department of Chemistry Renmin University of ChinaBeijing 100872China

Understanding the dynamic assembly process of DNA nanostructures is important for developing novel strategy to design and construct functional *** this work,temperature-controlled dynamic light scattering(DLS)strategy has been applied to study the global assembly process of DNA origami and DNA *** the temperature dependent size and intensity profiles,the self-assembly process of various DNA nanostructures with different morphologies have been well-studied and the temperature transition ranges could be *** advantage of the DLS information,rapid preparation of the DNA origami and the brick assembly has been realized through a constant temperature *** results demonstrate that the DLS-based strategy provides a convenient and robust tool to study the dynamic process of forming hieratical DNA structures,which will benefit understanding the mechanism of self-assembly of DNA nanostructures.

关键词： Dynamic light scattering Self-assembly process DNA nanostructures Temperature transition ranges Rapid preparation

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小批量生产过程中产品质量控制的研究

系统工程理论与实践 2002年第5期22卷 24-30页

作者：张文生中国科学院软件研究所

借助支持向量机技术解决了下面三个问题 :1 .在给定核函数的前提下 ,客观地、系统地给出一组增强输入模式 ,进而构造指出向量机网络 ,求出小批量数据所遵循的规律 ;2..通过理论分析说明 ,该方法不仅能控制学习结果对测试样本的误差 ,而... 详细信息

借助支持向量机技术解决了下面三个问题 :1 .在给定核函数的前提下 ,客观地、系统地给出一组增强输入模式 ,进而构造指出向量机网络 ,求出小批量数据所遵循的规律 ;2..通过理论分析说明 ,该方法不仅能控制学习结果对测试样本的误差 ,而且能提高学习结果的泛化能力 ,从而避免 BP学习过程的缺陷 ,;3.通过求解小批量生产过程产品质量规律的实例 ,验证了上述结果。

关键词：小批量生产过程产品质量控制函数型连接网络支持向量机现代制造业

Rational design and energy catalytic application of high-loading single-atom catalysts

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Rare Metals 2024年第10期43卷 4844-4866页

作者： Zi-wei Deng Yue Liu Jie Lin wen-Xing Chen Energy and Catalysis Center School of Materials Science and EngineeringBeijing Institute of Technology Ningbo institute of Materials Technology and Engineering Chinese Academy of Science

It is well known that single-atom catalysts(SACs)have become a hot topic in the field of catalysis due to their advantages such as 100% metal atom utilization efficiency,high catalytic activity and selectivity compared with conventional catalysts and nanocatalysts. However, the isolated metal atoms on SACs have thermodynamic instability and tend to agglomerate, which limit their catalytic ***, it is of great significance to synthesize stable and high-loading single-atom catalysts(HLSACs). In this paper,we review the research progress of HLSACs from two aspects:design and application. Firstly, we comprehensively introduce the synthesis strategies of HLSACs, namely, top-down and bottom-up methods. Secondly, we overview the application status of HLSACs in three fields: electrocatalysis, thermal catalysis and photocatalysis. Finally, we summarize the development prospects and challenges of HLSACs.

关键词： Design Electrocatalysis High-loading single-atom catalysts Photocatalysis Thermal catalysis

COMBINATION OF CFD AND CSD PACKAGES FOR FLUID-STRUCTURE INTERACTION

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Journal of Hydrodynamics 2008年第6期20卷 756-761页

作者： WANG Yi-wei LIN Yong-wen institute of Mechanics Chinese Academy of Sciences Beijing 100190 China china academy of Space Technology Beijing 100094 China

In this article the UDF script file in the Fluent software was rewritten as the ＂connecting file＂ for the Fluent and the ANSYS/ABAQUS in order that the joined file can be used to do aero-elastic computations. In this way the fluid field is computed by solving the Navier-Stokes equations and the structure movement is integrated by the dynamics directly. An analysis of the computed results shows that this coupled method designed for simulating aero-elastic systems is workable and can be used for the other fluid-structure interaction problems.

关键词： CFD/CSD fluid-structure interaction aero-elasticity fluttering