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Detection of electron-phonon coupling in two-dimensional materials by light scattering

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Nano Research 2021年第6期14卷 1711-1733页

作者： jia-Min Lai Ya-Ru xie Jun Zhang State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China CAS Center of Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing101408China Beijing Academy of Quantum Information Science Beijing100193China

Electron-phonon coupling affects the properties of two-dimensional(2D)materials significantly,leading to a series of novel *** light scattering provides a powerful experimental tool to explore electron-phonon interaction in 2D *** review gives an overview of the basic theory and experimental advances of electron-phonon coupling in 2D materials detected by Raman and Brillouin scattering,*** the Raman scattering part,we review Raman spectroscopy studies of electron-phonon coupling in graphene,transition metal disulfide compounds,van der Waals heterostructures,strongly correlated systems,and 2D magnetic *** the Brillouin scattering part,we extensively introduce Brillouin spectroscopy in non-van der Waals 2D structures,including temperature sensors for phonons and magnons,interfacial Dzyaloshinsky-Moriya interaction and spin torque in multilayer magnetic structures,as well as exciton-polariton in semiconductor quantum well.

关键词： electron-phonon coupling Raman scattering Brillouin scattering two-dimensional(2D)materials

Fullerenes for rechargeable battery applications:Recent developments and future perspectives

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Journal of Energy Chemistry 2021年第4期30卷 70-79页

作者： Zhipeng jiang Yuming Zhao Xing Lu jia xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Shenzhen Power Supply Bureau Co. Ltd.Shenzhen 518000GuangdongChina

The development of high-performance batteries is inseparable from the exploration of new *** them,fullerene C60 as an allotrope of carbon has many unique properties that are beneficial for battery applications,including precise structure,controllable derivatization,good solubility,and rich redox *** this review,we summarize the recent progress of fullerene-based materials in the field of rechargeable batteries and the key issues that need to be solved in the future application of *** hope this review can provide guidance and stimulate research about the applications of fullerenes in the field of energy storage.

关键词： Batteries Fullerene Carbon materials Energy storage

Certificateless Sequential Aggregate Signature Scheme on NTRU Lattice

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Chinese Journal of Electronics 2019年第2期28卷 294-300页

作者： xie jia HU Yupu GAO Juntao jiaNG Mingming School of Computer and Information Engineering Henan University of Economics and Law School of Telecommunications Engineering Xidian University School of Computer Science and Technology Huaibei Normal University

Having the advantages of certificateless signature and the aggregate signature at the same time,certificateless aggregate signature has been widely applied in e-business, e-government and software security since it was proposed in 2007. Although a number of certificateless aggregate signature schemes have been proposed, all of them are based on the classic number theory problem,which are no longer secure in the quantum era. In this paper, a certificateless sequential aggregate signature over number theory research unit lattice is proposed, which is proven to be secure in random oracle model. Moreover,we extend the new scheme into an efficient certificatebased sequential aggregate signature which is also secure in quantum era.

关键词： Certificateless Sequential Aggregate Signature Number theory research unit Secure Lattice

Cognitive Emotion Model for Eldercare Robot in Smart Home

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China Communications 2015年第4期12卷 32-41页

作者： HAN Jing xie lun LI Dan HE Zhijie WANG Zhiliang School of Computer and Communication Engineering University of Science and Technology Beijing

Based on the smart home and facial expression recognition, this paper presents a cognitive emotional model for eldercare robot. By combining with Gabor filter, Local Binary Pattern algorithm(LBP) and k-Nearest Neighbor algorithm(KNN) are facial emotional features extracted and recognized. Meanwhile, facial emotional features put influence on robot's emotion state, which is described in AVS emotion space. Then the optimization of smart home environment on the cognitive emotional model is specially analyzed using simulated annealing algorithm(SA). Finally, transition probability from any emotional state to a state of basic emotions is obtained based on the cognitive reappraisal strategy and Euclidean distance. The simulation and experiment have tested and verified the effective in reducing negative emotional state.

关键词： eldercare robot cognitive emotionmodel emotional state transition AVS emotionspace expression recognition smart home

Identification of low-resistivity-low-contrast pay zones in the feature space with a multi-layer perceptron based on conventional well log data

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Petroleum Science 2022年第2期19卷 570-580页

作者： lun Gao Ran-Hong xie Li-Zhi Xiao Shuai Wang Chen-Yu Xu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China

In the early exploration of many oilfields,low-resistivity-low-contrast(LRLC)pay zones are easily overlooked due to the resistivity similarity to the water *** identification methods are model-driven and cannot yield satisfactory results when the causes of LRLC pay zones are *** this study,after analyzing a large number of core samples,main causes of LRLC pay zones in the study area are discerned,which include complex distribution of formation water salinity,high irreducible water saturation due to micropores,and high shale ***,different oil testing layers may have different causes of LRLC pay *** a result,in addition to the well log data of oil testing layers,well log data of adjacent shale layers are also added to the original dataset as reference *** densitybased spatial clustering algorithm with noise(DBSCAN)is used to cluster the original dataset into 49 clusters.A new dataset is ultimately projected into a feature space with 49 *** new dataset and oil testing results are respectively treated as input and output to train the multi-layer perceptron(MLP).A total of 3192 samples are used for stratified 8-fold cross-validation,and the accuracy of the MLP is found to be 85.53%.

关键词： Low-resistivity-low-contrast(LRLC)pay zones Conventional well logging Machine learning DBSCAN algorithm Multi-layer perceptron

Unique Solvability for a Class of Non-newtonian Fluids for a Reacting Mixture with Vacuum

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Acta Mathematicae Applicatae Sinica 2016年第4期32卷 833-850页

作者： Hong-jun YUAN jia-ning xie College of Mathematics Jilin University School of Mathematics and Quantitative Economics Dongbei University of Finance and Economics

In this paper,we consider a class of non-Newtonian fluids for a reacting mixture in one-dimensional bounded interval, provided the initial data satisfying a compatibility condition. The main ingredient is that we allo... 详细信息

关键词： existence and uniqueness reactive gas flow vacuum non-Newtonian

Modelling of thrust generated by oscillation caudal fin of underwater bionic robot

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Applied Mathematics and Mechanics(English Edition) 2016年第5期37卷 601-610页

作者： Xinyan YIN Lichao jia Chen WANG Guangming xie Key State Laboratory for Turbulence and Complex Systems College of Engineering Peking University

A simplified model of the thrust force is proposed based on a caudal fin oscillation of an underwater bionic robot. The caudal fin oscillation is generalized by cen- tral pattern generators （CPGs）. In this model, the drag coefficient and lift coefficient are the two critical parameters which are obtained by the digital particle image velocimetry （DPIV） and the force transducer experiment. Numerical simulation and physical experi- ments have been performed to verify this dynamic model.

关键词： caudal fin oscillation thrust force underwater bionic robot digital particleimage velocimetry (DPIV) central pattern generator (CPG)

Origin of High Elastic Recovery of Hard-elastic Polypropylene Film at Room Temperature: the Mixed Contribution of Energy Elasticity and Entropy Elasticity

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Chinese Journal of Polymer Science 2020年第12期38卷 1325-1334页

作者： jia-Yi xie Rui-Jie Xu Cai-Hong Lei Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangdong Provincial Engineering Laboratory of Energy Storage Materials and DevicesSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China

The crystalline and amorphous regions were alternately arranged in the hard elastic polypropylene(PP)films with row-nucleated *** this work,their structure evolution during stretching and recovery at room temperature was followed and the elastic recovery mechanism was discussed by twice cyclic tensile *** the first stretching to 100%,the lamellae crystals are parallel separated and the intercrystallite crazing is formed at the first yield *** nano-cavities within the intercrystallite crazing appear when the strain reaches 20%.The strain-hardening process accompanies with the lamellae long period increasing and the intercrystallite crazing *** the secondary yield point,the lamellae cluster is further separated and more nano-cavities *** first and second recovery processes are complete *** recovery,firstly,the energy elasticity provided by nano-cavities surface tension drives the shrinkage of material,and then the entropy elasticity related to amorphous chain relaxation plays a leading role when the strain is smaller than the secondary yield *** elastic recovery process of hard elastic material is the co-contribution of energy elasticity and entropy *** work gives a clearer recognition about the source of hard elastic property and the role of amorphous region in material's deformation.

关键词： Hard-elastic material Elastic recovery Entropy elasticity Energy elasticity

Two New Group 3 LEA Genes of Wheat and Their Functional Analysis in Yeast

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Journal of Integrative Plant Biology 2005年第11期47卷 1372-1381页

作者： jia-Ning YU Jin-Song ZHANG lun SHAN Shou-Yi CHEN Department of Life Sciences Northwest Sci- Tech University of Agriculture and Forestry Yangling 712100 China Key Laboratory of Plant Biotechnology Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

The group 3 late embryogenesis abundant （LEA） proteins are thought to protect cells from stresses associated with dehydration during periods of water deficit. To investigate the functions of different members of the group 3 LEA genes, we isolated and characterized two new group 3 LEA genes, namely TaLEA2 and TaLEA3, from wheat （Triticum aestivum L.） and introduced TaLEA2 and TaLEA3 into Saccharmyces cerevisiae to examine the effect of these genes on yeast cell tolerance to osmotic, salt, and cold stresses. The TaLEA2 gene encoded a protein of 211 amino acids and possessed five repeats of 11-mer amino acid motifs. The TaLEA3 gene encoded a polypeptide of 211 amino acids with nine repeated units. Overexpression of TaLEA2 and TaLEA3 improved stress tolerance in transgenic yeast cells when cultured in medium containing sorbitol, salt and-20℃ freezing treatments respectively. However, the yeast transformants with TaLEA2 seemed to be more tolerant to hyperosmotic and freezing stress than transformants with TaLEA3. This implies that a close relationship exists between function and the number of repeats of the 11- mer amino acid motif in the group 3 LEA protein.

关键词： late embryogenesis abundant (LEA) protein Saccharmyces cerevisiae stress tolerance wheat.