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Chinese Journal of Chemistry 2013年第7期31卷 901-907页

作者： sheng Chen Chunfa Xu Long lu Qilong Shen Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

An efficient and cost-effective method for the preparation of fluorinated conjugated enynes was described, tile method was compatible with a variety of functional groups such as chloride, amine, cyano and ester group. The method could also be extended to the coupling of （R,Z）-3-（2-chloro-1,2-difluorovinyl）-4-alkyloxazolidin-2-one （3） with moderate yields.

关键词： fluorine enyne palladium chlorotrifluoroethylene

A tasseled cap transformation for CBERS-02B CCD data

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第9期12卷 780-786页

作者： Li sheng Jing-feng HUANG Xiao-lu TANG Institute of Agricultural Remote Sensing and Information Application Zhejiang UniversityHangzhou 310029China Key Laboratory of Agricultural Remote Sensing and Information System of Zhejiang Province Hangzhou 310029China Yuhang Branch Bureau of Planning Hangzhou Urban Planning BureauHangzhou 311100China

The tasseled cap transformation of remote sensing data has been widely used in agriculture,forest,ecology,and *** this paper,tasseled cap transformation coefficients appropriate for data from a new sensor(China & Brazil Earth Resource Satellite(CBERS-02B)) are *** first three components after transformation captured 98% of the four-band variance,and represent the physical characteristics of brightness(coefficients:0.509,0.431,0.330,and 0.668),greenness(coefficients:0.494,0.318,0.324,and 0.741),and blueness(coefficients:0.581,0.070,0.811,and 0.003),*** hope these results will enhance the application of CBERS-02B charge-coupled device(CCD) data in the areas of agriculture,forest,ecology,and landscape.

关键词： Tasseled cap transformation CBERS-02B CCD Reflectance factor

New Members of High-Energy-Density Compounds: YN5 and YN8

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Chinese Physics Letters 2021年第6期38卷 49-53页

作者： Jun-Yi Miao Zhan-sheng lu Feng Peng Cheng lu School of Physics Henan Normal UniversityXinxiang 453007China College of Physics and Electronic Information Luoyang Normal UniversityLuoyang 471022China School of Mathematics and Physics China University of Geosciences(Wuhan)Wuhan 430074China

Polymeric nitrogen is a promising candidate for a high-energy-density material. Synthesis of energetic compounds with high chemical stability under ambient conditions is still a challenging problem. Here we report a theoretical study on yttrium nitrides by first principles calculations combined with an effective crystal structure search method. It is found that many yttrium nitrides with high nitrogen content can be formed under relatively moderate pressures. The results indicate that the nitrogen-rich YN_(5) and YN_(8) compounds are recoverable as metastable high-energy materials under ambient conditions, and can release enormous energies(2.51 kJ·g^(-1) and 3.18 kJ·g^(-1)) while decomposing to molecular nitrogen and YN. Our findings enrich the family of transition metal nitrides, and open avenues for design and synthesis of novel high-energy-density materials.

关键词： material ambient yttrium

Numerical comparison of two modes of gas-solid riser operation： Fluid catalytic cracking vs CFB combustor

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Particuology 2017年第2期15卷 42-48页

作者： Yifeng Mei Mingzhao Zhao Bona lu sheng Chen Wei Wang Stare Key Laboratory afMultiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Chemical Engineering Sichuan University Chengdu 610065 China Stare Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China University of Chinese Academy of Sciences Beijing 100049 China

Two modes of gas-solid riser operation, i.e., fluid catalytic cracking （FCC） and circulating fluidized bed combustor （CFBC）, have been recognized in literature; particularly in the understanding of choking phenomena. This work compares these two modes of operation through computational fluid dynamics （CFD） simulation. In CFD simulations, the different operations are represented by fixing appropriate boundary conditions： solids flux or solids inventory. It is found that the FCC and CFBC modes generally have the same dependence of solids flux on the mean solids volume fraction or solids inventory. However, during the choking transition, the FCC mode of operation needs more time to reach a steady state; thus the FCC system may have insufficient time to respond to valve adjustments or flow state change, leading to the choking. The difference between FCC and CFBC systems is more pronounced for the systems with longer risers. A more detailed investigation of these two modes of riser operation may require a three-dimensional full loop simulation with dynamic valve adjustment.

关键词： Fluidization Computational fluid dynamics Simulation Fluid catalytic cracking Circulating fluidized bed Choking

Constructing core@shell structured photothermal nanosphere with thin carbon layer confined Co-Mn bimetals for pollutant degradation and solar interfacial water evaporation

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Rare Metals 2024年第4期43卷 1686-1701页

作者： hong-Yang Zhu Meng-Ting Liu Gang Wang Rong-Rong Du hong-Yao Zhao Hao lu Shi-Qi Yang sheng Tang Zeng-Jing Guo Jun Yang Cheng-Zhang Zhu Fu Yang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212003China School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng252000China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing210009China

Photothermal material applied in environmental governance has attracted growing *** combining the Stober method and dopamine-triggered coating strategy,Co-Mn precursor was in situ incorporated into the poly dopamine(PDA)layer over the surface of silica ***,a unique photothermal nanosphere with SiO_(2)core and thin carbon layer and dual Co-Mn oxides shell was allowed to form by sequential heat treatment in the inert atmosphere(SiO_(2)@CoMn/C).The bimetallic fraction of Co/Mn in the carbon layer and post-treatment calcination temperature was comprehensively tuned to optimize the peroxymonosulfate(PMS)activation performance of the *** state of bimetallic species was studied including their physical distribution,chemical valence,and interplay by various ***,Co oxides appear as dominant monodispersed nanoparticles(~10 nm),while Mn with cluster-like morphology is observed to uniformly distribute over thin-layer carbon and adhered to the surface of SiO_(2)nanospheres(~250 nm).The calcined temperature could tune the oxidized state of Co species,leading to the optimization of the catalytic performance of introduced dual metal *** a result,this obtained optimal catalyst integrated the advantages of exposed bimetallic CoMn species and N-doped thin carbon to deliver excellent catalytic PMS activation performance and photothermal synergetic catalytic mineralization ability for diversiform *** reactions condition controls and anion interference studies were conducted to identify the adaptability of the optimal ***,the application of solar-driven interfacial water evaporation using optimal SiO_(2)@Co_3Mn_1/C-600 catalyst was explored,showing a high water evaporation rate of 1.48 kg·m^(-2)·h^(-1)and an efficiency of 95.2%,further revealing a comprehensive governance functionality of obtained material in the complex pollution condition.

关键词： Photothermal Peroxymonosulfate(PMS)activation Bimetallic synergy Water evaporation Advanced oxidation process

Attitude control system design and on-orbit performance analysis of nano-satellite––‘‘Tian Tuo 1’’

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Chinese Journal of Aeronautics 2014年第3期27卷 593-601页

作者： Ran Dechao sheng Tao Cao lu Chen Xiaoqian Zhao Yong College of Aerospace Science and Engineering National University of Defense Technology

＂Tian Tuo 1＂（TT-1） nano-satellite is the first single-board nano-satellite that was suc- cessfully launched in China. The main objective of TT-1 is technology demonstration and scientific measurements. The satellite carries out the significant exploration of single-board architecture fea- sibility validation, and it is tailored to the low-cost philosophy by adopting numerous commercial- off-the-shelf （COTS） components. The satellite is featured with three-axis stabilization control capability. A pitch bias momentum wheel and three magnetic coils are adopted as control actuators. The sun sensors, magnetometers and a three-axis gyro are employed as the measurement sensors. The quaternion estimator （QUEST） and unscented Kalman filter （UKF） method are adopted for the nano-satellite attitude determination. On-orbit data received by ground station is conducted to analysis the performance of attitude determination and control system （ADCS）. The results show that the design of ADCS for TT-1 is suitable, robust and feasible.

关键词： Actuators ADCS On-orbit performance Sensors TT-1 nano-satellite

第一性原理研究取代基对含能材料撞击感度的影响

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原子与分子物理学报 2025年第3期42卷 124-134页

作者：黎红艳卢妹包恃缘刘福生刘正堂白志鑫刘其军西南交通大学物理科学与技术学院成都610031 西北工业大学凝固技术国家重点实验室西安710072

取代基的种类和位置会影响含能材料的分子结构和化学键强度,从而对其撞击感度产生影响.本文基于第一性原理计算方法分析了氨基基团和甲基基团对三硝基苯类含能材料撞击感度的影响.根据计算得到的弹性常数,通过Voigt-Reuss-Hill平均法计... 详细信息

取代基的种类和位置会影响含能材料的分子结构和化学键强度,从而对其撞击感度产生影响.本文基于第一性原理计算方法分析了氨基基团和甲基基团对三硝基苯类含能材料撞击感度的影响.根据计算得到的弹性常数,通过Voigt-Reuss-Hill平均法计算得到了几种含能材料的体积模量B、剪切模量G、杨氏模量E和泊松比v.接着,尝试通过分析氨基和甲基取代基的种类和数量对力学参数、能带结构、态密度等性质的影响.在一定程度下,氨基个数与撞击感度之间呈负相关,与禁带宽度呈正相关,可以通过比较带隙值来判断一组含氨基的多硝基芳烃材料的撞击感度大小关系.相较于氨基,甲基数量与力学性能的相关性较氨基取代基更好,甲基数量变化对材料的总态密度能量影响更大;甲基数量与材料的撞击感度之间没有相关性但与禁带宽度呈负相关,无法通过带隙值的大小来确定一组含甲基的硝基芳烃类含能材料的撞击感度大小关系.

关键词：含能材料撞击感度取代基力学性质电子性质

MWCNTs/SiO2 Composite System:Carrier Transmission,Twin-Percolation and Dielectric Properties

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Chinese Physics Letters 2011年第10期28卷 232-235页

作者： CAO Wen-Qiang lu Ming-Ming WEN Bo CHEN Yuan-lu LI hong-Bo YUAN Jie CAO Mao-sheng School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081 School of EMPS University College DublinDublin 4Ireland School of Information Engineering Minzu University of ChinaBeijing 100081

We synthesize composite systems of multi-wall carbon nanotubes(MWCNTs)/SiO_(2) by using the sol−gel *** dielectric properties of the systems with different-concentration MWCNTs are *** our MWCNTs/SiO_(2) inorganic systems,the twin−percolation phenomenon exists when the concentrations of MWCNTs are 5–10%and 15–20%.The permittivity and conductivity have jumping *** twin−percolation phenomenon is attributed to the special transfer mechanism of MWCNTs in the system,determined by hopping and migrating *** of dielectric properties and conductance of the MWCNTs/SiO_(2) systems are conformed to the percolation *** special percolation phenomenon and electric properties of MWCNTs/SiO_(2) can help us comprehend the conductivity mechanism of the MWCNTs/SiO2 systems effectively,and promote the development of a high performance function composite system.

关键词： composite percolation conductivity

Mechanistic insights into sequestration of U(VI) toward magnetic biochar: Batch, XPS and EXAFS techniques

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Journal of Environmental Sciences 2018年第8期30卷 217-225页

作者： Qingyuan Hu Yuling Zhu Baowei Hu Songhua lu Guodong sheng College of Life Science College of Chemistry and Chemical Engineering Shaoxing University Institute of Plasma Physics Chinese Academy of Science

The magnetic iron oxide（Fe3O4） nanoparticles stabilized on the biochar were synthesized by fast pyrolysis of Fe（II）-loaded hydrophyte biomass under N2 conditions. The batch experiments showed that magnetic biochar presented a large removal capacity（54.35 mg/g）at pH 3.0 and 293 K. The reductive co-precipitation of U（VI） to U（IV） by magnetic biochar was demonstrated according to X-ray diffraction, X-ray photoelectron spectroscopy and X-ray absorption near edge structure analysis. According to extended X-ray absorption fine structure analysis, the occurrence of U-Fe and U-U shells indicated that high effective removal of uranium was primarily inner-sphere coordination and then reductive co-precipitation at low pH. These observations provided the further understanding of uranium removal by magnetic materials in environmental remediation.

关键词： Magnetic biochar Uranium X-ray absorption spectroscopy Sequestration

Influence of formation in-situ stress on mechanical heterogeneity of shale through grid nanoindentation

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Petroleum Science 2022年第1期19卷 211-219页

作者： Mao sheng Shi-Zhong Cheng Zhao-Hui lu Ye Zhang Shou-Ceng Tian Gen-sheng Li College of Petroleum Engineering China University of Petroleum-Beijing102249PR China National and Local Joint Engineering Research Center of Shale Gas Exploration and Development Chongqing401120PR China

Mechanical heterogeneity is a major characteristic of the organic-rich *** relation between mechanical heterogeneity and formation in-situ stress has been seldomly addressed but important to understand hydraulic fracture propagation,wellbore stability,and hydrocarbon *** this paper,the grid nanoindentation technique was used to characterize the heterogeneity of the mechanical properties of Longmaxi organic-rich shales from various burial depths and in-situ *** measured elastic modulus and hardness of each sample are deconvolved into three phases including soft phase,medium stiff phase and stiff phase according to mineral *** the burial depth and corresponding in-situ stress increase,the overall elastic modulus and hardness of the sample ***,the percentage of soft minerals decreases,and the probability distribution tends to concentrate through 95%confidence interval evaluation which demonstrates weakened ***,SEM images provide evidence that extended cracking,initiated cracking,crushing and ductile deforming always occur around indentation *** confirms that even under deep buried depth and high in-situ stress,brittle fracture and ductile deformation can exist *** paper demonstrates the influence of in-situ stress on the heterogeneity of shale micromechanics.

关键词： Shale Heterogeneity Elastoplasticity Nanoindentation