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Journal of Materials Science & Technology 2018年第9期34卷 1526-1531页

作者： Chenchen Zhang Siyue Wei Lixian Sun Fen Xu Pengru Huang Hongliang Peng School of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 China Guangxi Key Laboratory of information Materials Guilin 541004 China Guangxi Collaborative Innovation center of Structure and property for New Energy and Materials Guilin 541004 China

Two new 3 D metal-organic frameworks（MOFs） named [Pr2（PDA）3-3 H2 O]-H2 O（1） and[Nd2（PDA）3-3 H2 O] H2 O（2） [2,6-Pyridinedicarboxylic acid（H2 PDA）] were synthesized by solvothermal method. They were characterized by elemental analyses（EA）, infrared spectroscopy（FT-IR）, thermogravimetric analysis（TG）, photocatalysis performance and single crystal X-ray diffraction studies（XRD）.The XRD analysis indicated that MOFs（1） and（2） both belong to the monoclinic system with space group P2（1）/C. The structural model were drawn by the diamond software, and the structure revel that MOFs（1） and（2） adopt three-dimensional（3 D） frameworks constructed by cross-linking of one-dimensional（1 D） infinite chain secondary building unit（SBU） by 2,6-Pyridinedicarboxylic acid and hydrogen bond as linker. These frameworks feature channels inside which coordinated H20 solvent molecules are located. Thermogravimetric analysis showed that both MOFs are thermally stable, the photocatalytic evaluation showed the materials have a good prospect in degration methylene blue. As for complex1, the decomposition efficiency of Methylene blue was about 91.08% after 130 min and the complex 2 reach 90.45% after 160 min under the sun light.

关键词： Metal-organic frameworks Solvothermal method Photocatalysis performance

Understanding of hydrogen desorption mechanism from defect point of view

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National Science Review 2018年第3期5卷 318-320页

作者： Jianchuan Wang Yong Du Lixian Sun State Key Laboratory of Powder Metallurgy Central South University Guangxi Key Laboratory of information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials School of Material Science and Engineering Guilin University of Electronic Technology

Widespread adoption of hydrogen for vehicle applications critically depends on the discovery of solid materials to store hydrogen with high volumetric and gravimetric densities,as well as to extract and insert it at sufficiently rapid *** hydrides(such as NaAlH;,LiAlH;,LiBH;,Ca（BH;）;,Li;BN;H;and LiNH;),light metal hydrides of MgH;and AlH0;and ammonia borane（NH;BH;）have recently received considerable attention as potential hydrogen storage materials due to their high hydrogen gravimetric capacity as well as

关键词： Li Understanding of hydrogen desorption mechanism from defect point of view NH

Live Stream Copyright Infringement’s Form and Platform’s Responsibility

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China intellectual property 2021年第1期 74-77页

作者： Tao Qian China University of Political Science and Law intellectual property Innovation and Competition Research center

With the vigorous development of the live stream industry,copyright infringement disputes continue to *** the host presents a copyrighted work of others without permission during the live stream,they shall be liable for infringement without reasonable defense,and the platform that provides the live stream service may also be held *** article introduces in detail the behavior of using other people's works in the live stream situation,the types of rights that the copyright owner can claim,and analyzes the considerations when judging whether the live stream platform is at fault.

关键词： service Stream Platform

On the Nature of Standards and Patents

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China Standardization 2008年第3期53卷 9-13页

作者： Bing WANG(Professor),Xu LI(Assistant Professor),Lanxi XIONG(LLM)Research center for intellectual property Law,School of Law Tsinghua University,Beijing,PRC Research center for intellectual property Law School of Law Tsinghua University Beijing PRC

Introduction ’Standard’ and ’patent’ are the buzz words in China’s information and communication technology(ICT) industry. While the government has expressed its intention to promote standardization and patent protec- tion, what direction should enterprises especially domestic ICT companies take? What is the role of govern- ment in standardization, when different parties have different, often conflicting, voices?This article reviews and refines the nature of standards and patents,and answers the above questions.

关键词：汽孔

A correction method of color projection fringes in 3D contour measurement

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Optoelectronics Letters 2015年第4期11卷 303-306页

作者：宋丽梅李宗艳陈昌曼习江涛郭庆华李晓捷 Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Department of Electricity Examination Patent Examination Cooperation Tianjin Center of the Patent OfficeState Intellectual Property Office School of Electrical Computer and Telecommunications EngineeringUniversity of Wollongong

In the three-dimensional(3D) contour measurement,the phase shift profilometry(PSP) method is the most widely used ***,the measurement speed of PSP is very low because of the multiple *** order to improve the measurement speed,color grating stripes are used for measurement in this *** the measurement,only one color sinusoidal fringe is projected on the measured ***,the measurement speed is greatly *** there is coupling or interference phenomenon between the adjacent color grating stripes,a color correction method is used to improve the measurement results.A method for correcting nonlinear error of measurement system is proposed in this paper,and the sinusoidal property of acquired image after correction is better than that before *** results show that with these correction methods,the measurement errors can be ***,it can support a good foundation for the high-precision 3D reconstruction.

关键词： correction contour projection grating correcting projected pixel sinusoidal fringe Tianjin

Enhanced thermoelectric properties of p-type polycrystalline SnSe by regulating the anisotropic crystal growth and Sn vacancy

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Chinese Physics B 2018年第4期27卷 103-109页

作者： Chengyan Liu Lei Miao Xiaoyang Wang Shaohai Wu Yanyan Zheng Ziyang Deng Yulian Chen Guiwen Wang Xiaoyuan Zhou Guangxi Key Laboratory of information Material Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials School of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 China College of Physics Chongqing University Chongqing 401331 China

Thermoelectric selenides have attracted more and more attentions ***,p-type Sn Se polycrystalline bulk materials with good thermoelectric properties are *** using the SnSe2 nanostructures synthesized via a wetchemistry route as the precursor,polycrystalline Sn Se bulk materials were successfully obtained by a combined heattreating process under reducing atmosphere and following spark plasma sintering *** a reference,the Sn Se nanostructures synthesized via a wet-chemistry route were also fabricated into polycrystalline bulk materials through the same *** thermoelectric properties of the Sn Se polycrystalline transformed from SnSe2 nanostructures indicate that the increasing of heattreating temperature could effectively decrease the electrical resistivity,whereas the decrease in Seebeck coefficient is nearly *** a result,the maximum power factor is enhanced from 5.06×10^-4W/m·K^2 to 8.08×10^-4W/m·K^2 at 612℃.On the other hand,the reference sample,which was obtained by using Sn Se nanostructures as the precursor,displays very poor power factor of only 1.30×10^-4W/m·K^2 at 537℃.The x-ray diffraction（XRD）,scanning electron microscope（SEM）,x-ray fluorescence（XRF）,and Hall effect characterizations suggest that the anisotropic crystal growth and existing Sn vacancy might be responsible for the enhanced electrical transport in the polycrystalline Sn Se prepared by using SnSe2 *** the other hand,the impact of heat-treating temperature on thermal conductivity is not *** to the boosting of power factor,a high z T value of 1.07 at 612℃ is *** study provides a new method to synthesize polycrystalline Sn Se and pave a way to improve the thermoelectric properties of polycrystalline bulk materials with similar layered structure.

关键词： thermoelectric properties SnSe2 nanostructures polycrystalline SnSe anisotropic crystal growth

Multifunctional Integrated Organic-Inorganic-Metal Hybrid Aerogel for Excellent Thermal Insulation and Electromagnetic Shielding Performance

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Nano-Micro Letters 2024年第10期16卷 163-175页

作者： Zhaoqi Niu Fengjin Qu Fang Chen Xiaoyan Ma Beixi Chen Luyao Wang Miao Xu Shumeng Wang Liang Jin Chengshuang Zhang Xiao Hou Ministry of Industry and information Technology Key Laboratory of Special Function and Smart Polymer Materials Key Laboratory of Materials Physics and Chemistry of Ministry of Education for Extraordinary ConditionsNorthwestern Polytechnical UniversityXi'an 710072People's Republic of China Spallation Neutron Source Science center Institution Dongguan 523803People's Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People's Republic of China China Aerospace Science and Industry Corporation Sixth Academy Hohhot 022185People's Republic of China Xi'an Aerospace Composites Research Institute Xi'an 710025People's Republic of China China Aerospace Science and Technology Corporation Beijing 100037People's Republic of China

Vehicles operating in space need to withstand extreme thermal and electromagnetic environments in light of the burgeoning of space science and *** is imperatively desired to high insulation materials with lightweight and extensive mechanical ***,a boron-silica-tantalum ternary hybrid phenolic aerogel(BSiTa-PA)with exceptional thermal stability,extensive mechanical strength,low thermal conductivity(49.6 mW m^(-1)K^(-1)),and heightened ablative resistance is prepared by an expeditious *** extremely thermal erosion,the obtained carbon aerogel demonstrates noteworthy electromagnetic interference(EMI)shielding performance with an efficiency of 31.6 dB,accompanied by notable loading property with specific modulus of 272.8 kN·m kg^(-1).This novel design concept has laid the foundation for the development of insulation materials in more complex extreme environments.

关键词： Multi-hybrid aerogel Metal-phenolic coordination Thermal insulation EMI shielding Convertibility and multifunctionality

High Quality Data Hiding in Halftone Image Based on Block Conjugate

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Chinese Journal of Electronics 2018年第1期27卷 150-158页

作者： DING Haiyang LI Zichen YANG Yixian YOU Fucheng LIU Fuping information Security center Beijing University of Posts and Telecommunications College of information Engineering Beijing Institute of Graphic Communication

This paper proposes a High quality data hiding in halftone image based on block conjugate(HQDHBC). We construct Least mean square filters(LMSF),and using LMSFs to evaluate the quality of halftone images. This paper proposes block conjugate property, and this property can be applied to hide a secret *** a data hiding method based on block conjugate can be proposed, and in this method two images should be divided into multiple blocks of M × N pixels, and in the corresponding block if the first M × N-1 pixels are conjugate or identical, the last pixel can implement normal halftone method instead of date hiding methods. Experimental results show that the proposed HQDHBC can be applied in gray-scale and color error diffused halftone images, and through implementing this method, not only the quality of halftone images can be improved, but also the Correct decoding rate(CDR) of revealed pattern can be guaranteed.

关键词： Date hiding Block conjugate Least mean square filters(LMSF) Error diffusion

Fabrication and characterization of novel meso-porous carbon/n-octadecane as form-stable phase change materials for enhancement of phase-change behavior

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Journal of Materials Science & Technology 2019年第5期35卷 939-945页

作者： Yurong Liu Yongpeng Xia Kang An Chaowei Huang Weiwei Cui Sheng Wei Rong Ji Fen Xu Huanzhi Zhang Lixian Sun School of Material Science & Engineering Guilin University of Electronic Technology Guilin 541004 China Guangxi Key Laboratory of information Materials and Guangxi Collaborative Innovation center of Structure and property for New Energy and Materials Guilin University of Electronic Technology. Guilin 541004 China

In this study, series of novel composite phase change materials(PCMs) were prepared through vacuum impregnation by using meso-porous carbon as a supporting matrix and n-octadcane as *** meso-porous carbon material was prepared through one-pot co-assembly method, using resorcinol and formaldehyde as carbon precursor, tetraethoxysilane as silica sources and triblock copolymer F127 as a template. And the phase behaviors of n-octadcane confined in the nano-porous structure of the meso-porous carbon were further investigated. Fourier transform-infrared spectroscopy spectra show that n-octadecane was effectively encapsulated in the porous structure of mesoporous carbon and the composite PCMs were successfully prepared. Differential scanning calorimetry results confirm that the composite PCMs possess a good phase change behavior, fast thermal-response rate and excellent thermal cycling stability. In addition, the composite PCMs possess expected heat storage and heat release properties. All these results demonstrate that the composite PCMs possess good comprehensive property so that they can be used widely in energy storage systems.

关键词： Phase change materials Meso-porous carbon Microstructure Thermal performance

Cobalt(Ⅱ)coordination polymers as anodes for lithium-ion batteries with enhanced capacity and cycling stability

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Journal of Materials Science & Technology 2018年第8期34卷 1412-1418页

作者： Yumei Luo Lixian Sun Fen Xu Siyue Wei Qingyong Wang Hongliang Peng Chonglin Chen Guangxi Key Laboratory of information Materials Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin541004China Department of Physics and Astronomy Texas University at San AntonioUSA

Coordination polymer Co-btca （H4btca = 1,2,4,5-benzenetetracarbo ylic acid） was synthesized using a simply hydrothermal method. In particular, the as-prepared Co-btca was applied as an anode material for lithium-ion battery for the first time. Single crystal X-ray diffraction results indicated that the as- prepared Co-btca displayed unique layer structure, which was beneficial to transport Li ions and electrons. Also, owing to the porous structure and appropriate specific surface area, Co-btca electrode delivered a reversible capacity of 801.3 mA h/g after 50 cycles at a current density of 200 mA/g. The reversible capacity of 773.9 mA h/g was maintained after 200 cycles at a current density of 500 mA/g, exhibiting enhanced cycle stability. It also showed improved rate performance, making it a promising anode material and a new choice for lithium-ion batteries.

关键词： Lithium-ion battery Anode Coordination polymer Carboxylate