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Phonon scattering and exciton localization: molding exciton flux in two dimensional disorder energy landscape

eLight 2021年第1期1卷 57-68页

作者： Pengfei qi yang Luo Beibei Shi Wei Li Donglin liu Liheng Zheng Zhixin liu yanglong Hou Zheyu Fang School of Physics State Key Laboratory for Mesoscopic PhysicsAcademy for Advanced Interdisciplinary StudiesCollaborative Innovation Center of Quantum MatterNano-Optoelectronics Frontier Center of Ministry of EducationPeking UniversityBeijing 100871China. Institute of Modern Optics Tianjin Key Laboratory of Micro-Scale Optical Information Science and TechnologyNankai UniversityTianjin 300350China. Beijing Key Laboratory for Magnetoelectric Materials and Devices Beijing Innovation Centre for Engineering Science and Advanced TechnologyDepartment of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijing 100871China.

Two dimensional excitonic devices are of great potential to overcome the dilemma of response time and integration in current generation of electron or/and photon based *** ultrashort diffusion length of exciton arising from ultrafast relaxation and low carrier mobility greatly discounts the performance of excitonic *** scattering and exciton localization are crucial to understand the modulation of exciton flux in two dimensional disorder energy landscape,which still remain ***,we report an optimized scheme for exciton diffusion and relaxation dominated by phonon scattering and disorder potentials in WSe2 *** effective diffusion coefficient is enhanced by>200%at 280 *** excitons tend to be localized by disorder potentials accompanied by the steadily weakening of phonon scattering when temperature drops to 260 K,and the onset of exciton localization brings forward as decreasing *** findings identify that phonon scattering and disorder potentials are of great importance for long-range exciton diffusion and thermal management in exciton based systems,and lay a firm foundation for the development of functional excitonic devices.

关键词： Exciton diffusion Exciton relaxation 2D semiconductors Phonon scattering Disorder potentials

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Deep Underground Earthquake Observation:Small to Moderate Earthquakes and Microearthquakes Identification

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Journal of Earth Science 2024年第5期35卷 1789-1794页

作者： Chang Chen Wentao Wan Yun Wang Jingsong liu Hongyi Li qiangqiang Miao Yongsheng He Juan qi Chao Wang MWMC Research Group School of Geophysics and Information TechnologyChina University of GeosciencesBeijing 10083China State Kay Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 10083China Institute of Engineering Protection Engineering Research Institute of Academy of Military SciencesLuoyang 471000China College of Electrical and Information Engineering Anhui University of Science and TechnologyHuainan 232001China Institute of Geochemistry.ChineseAcademy of Sciences Guivang 550081.China

0 INTRODUCTION Small to moderate earthquakes and microearthquakes occur widely and numerously(Luo,2010),which contributes to the research of focal mechanism,faults and deep geodynamics(Li et al.,2023;Yi et al.,2020;Mori,1991).It is of great significance for the focal mechanism solution of main shock and the distribution of coseismic activities(Meng et al.,2022;Zhang et al.,2021).

关键词： Earthquake earthquakes seismic

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Refraction difference value variations in children and adolescents with different refractive errors

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International Journal of Ophthalmology(English edition) 2024年第12期17卷 2236-2242页

作者： Da-Wen Wu Ze-Yi yang yan Nie He-ya Ye Liang Chen Long-qian liu Guo-Yuan yang Department of Ophthalmology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Laboratory of Optometry and Visual Science West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

AIM:To evaluate the refraction difference value(RDV)variations in children and adolescents with different refractive errors and analyze its correlation with refractive ***:Participants aged 4-16y with different refractive statuses(hyperopia,emmetropia,myopia)underwent comprehensive eye examinations,including spherical equivalent(SE)refraction,axial length(AL),total RDV(TRDV),and RDVs at various eccentricities(0°-15°,15°-30°,30°-45°)and quadrants(inferior,superior,nasal,temporal).Statistical analysis involved one-way ANOVA for group comparisons and Pearson correlation for examining relationships between SE/AL and *** t-tests compared quadrant-specific RDVs within ***:Significant difference was found in TRDV(P<0.001),RDV15°-30°(P=0.033),RDV30°-45°(P<0.001),RDV-inferior(RDV-I,P<0.001)and RDV-temporal(RDV-T,P<0.001)among hyperopia,emmetropia and myopia *** correlation analysis revealed a negative correlation of SE with TRDV(P=0.001),RDV30°-45°(P=0.004),RDV-I(P=0.047),and RDV-T(P<0.001).The differences between RDV-superior(RDV-S)and RDV-I were statistically significant in all groups(P<0.001 for all)and between RDV-T and RDV-nasal(RDV-N)were statistically significant in hyperopia group(P<0.001).Within the premyopic group,the analysis revealed a negative correlation of SE with RDV-I(P=0.009).Pearson correlation analysis revealed a positive correlation of AL with TRDV(P=0.036),RDV15°-30°(P=0.004),RDV30°-45°(P<0.001),RDV-S(P=0.003),RDV-I(P<0.001),RDV-T(P<0.001),RDV-N(P=0.022),while revealed a negative correlation of AL with RDV0-15°(P=0.018).CONCLUSION:Our study indicates TRDV,RDV30°-45°,RDV-I,RDV-T may relate to refractive development,and a negative correlation between SE and RDV-I in pre-myopic children.

关键词： multispectral refractive topography refraction difference value degrees of myopia children adolescents

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Supercontinuum fiber laser-based coherent anti-Stokes Raman scattering microscopy for label-free chemical imaging

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Journal of Innovative Optical Health Sciences 2022年第4期15卷 108-115页

作者： Nan Wang Jiaojiao Zhang Wangting Zhou Siting liu Jing Li Xinyi Xu qi Zeng Yong Li Shouping Zhu Xueli Chen Xi'an Key Laboratory of Intelligent Sensing and Regulation of trans-Scale Life Information School of Life Science and Technology Xidian University Xi'anShaanxi 710126P.R.China Engineering Research Center of Molecular&Neuro Imaging of the Ministry of Education Xidian University Xi'anShaanxi 710126P.R.China Shaanxi Eye Hospital Xi'an People's Hospital(Xi'an Fourth Hospital)Affiliated Guangren Hospital School of Medicine Xi'an Jiaotong UniversityXi'an 710004P.R.China

Coherent anti-Stokes Raman scattering(CA RS)microscopy can resolve the chemical compo-nents and distribution of living biological systems in a label-firee manner and is favored in several *** CA RS microscopes typically use bulky,high-performance solid-state lasers,which are expensive and sensitive to environmental *** their relatively low cost and environmental sensitivity,supercontinum fiber(SF)lasers with a small footprint have found increasing use in biomedical *** these features,in this paper,we homebuilt a low-cost CARS microscope based on a SF laser module(scCA RS microscope).This SF laser module is specially customized by adding a time synchronized seed source channel to the SF laser to form a dual-channel output *** performance of the scCARS microscope is evaluated with dimethyl sulfoxide,whose results confirm a spatial resolution of better than 500nm and a detection sensitivity of millimolar *** dual-color imaging capability is further demonstrated by imaging different species of mixed *** finally explore the potential of our scCARS microscope by mapping lipid droplets in different cancer cells and corneal stromal lenses.

关键词： Coherent anti-Stokes Raman scattering supercontinuum fiber laser lipid mapping cancer cell

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Geochemical Characteristics of Eolian Deposits in the Chengdu Plain of Sichuan Province and the Implications for Provenance

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Acta Geologica Sinica(English Edition) 2013年第6期87卷 1712-1723页

作者： TAN Yuanlong qiAO yansong ZHAO Zhizhong WANG yan qi Lin FU Jianli liu Zongxiu yaO Haitao WANG Shubing JIANG Fuchu Institute of Geomechanics Chinese Academy of Geological Sciences Key Laboratory of Neotectonic Movement and Geohazard

In this study Chengdu Red Earth （CRE） from the Chengdu Plain （CP）,Sichuan province,was analyzed for its elemental （major and trace elements） and isotopic （Sm-Nd） geochemistry and compared with Pleistocene loess and paleosol samples from the Chinese Loess Plateau （CLP） in Northern *** geochemical composition of CRE is similar to north China loess,and also resembles the average *** indicates that CRE,as loess deposits in Northern China,was derived from well-mixed sedimentary protoliths that have undergone numerous upper crustal recycling ***,obvious differences in the geochemical characteristics of CRE and the north China loess are also revealed in our *** chemically stable elements,CRE has higher Ti,Zr,Hf and lower ΣREE,Ba contents in comparison with loess samples from the *** analysis shows that CRE has higher TiO2/Al2O3,SiO2/Al2O3,Ba/Rb and lower Ce/Yb,Eu/Yb,LaN/YbN and ΣLREE/ ΣHREE *** Sm-Nd isotopic geochemistry,Sm and Nd content and the εNd（0） value in CRE are significantly higher than those in north China *** higher TiO2 content in CRE coincided with a high background concentration of Ti in the Sichuan Basin and the surrounding *** lower ΣREE and higher Sm,Nd,εNd（0） values are related to the wide distribution of basalt in the southwest Sichuan *** elemental and isotopic geochemistry of CRE indicates that eolian materials in the CP predominantly come from the Sichuan Basin and the surrounding regions,which differs from loess deposits in the CLP.

关键词： The Chengdu Plain Chengdu red earth eolian deposits geochemical characteristics provenance

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An antiempirical strategy:sacrificing aromatic moieties in the polymer precursor for improving the properties of the derived N-doped porous carbons

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Green Chemical Engineering 2020年第1期1卷 70-76页

作者： Shi-Chao qi Ding-Ming Xue Guo-Xing Yu Rong-Rong Zhu Xiao-qin liu Lin-Bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Material(SICAM)College of Chemical EngineeringNanjing Tech UniversityNanjing211816China

With the carbonization at an elevated temperature,high aromaticity of a precursor for porous carbons was traditionally thought to be crucial for the resultant perfect textural properties and ideal application performances of the porous ***,many efforts have been done to search or to artificially prepare the polymer precursors with higher aromaticity to generate more satisfying porous ***,an antiempirical case was found in this *** copolymerization between 1,3,5-tris(chloromethyl)-2,4,6-trimethylbenzene(TCM)and cyclohexane-1,4-diamine was successfully implemented to get a polymer code-named NUT-40,in which half of the ring structures are nonaromatic,while N-doped porous carbons(NDPCs)with better textural properties(e.g.,SBET=1363 m^(2)g^(-1)for NDPC-600)and competitive CO_(2)capture abilities(e.g.,CO_(2)capacity=4.3 mmol g^(-1)at 25℃and 1 bar for NDPC-600)were generated from the NUT-40,compared with the NDPC counterparts derived from the NUT-4 in a previous study(e.g.,SBET=958 m^(2)g^(-1)and CO_(2)capacity=3.8 mmol g^(-1)at 25℃and 1 bar for NDPC-600),in which TCM and ursol were employed as the monomers instead,and thus the ring structures in the NUT-4 was fully *** first-principle and molecular dynamics simulations,it was demonstrated that the embryo pore structure in the NUT-40 molecule can be more easily maintained during the carbonization than that of the NUT-4,which finally improves the surface area and porosity of the NUT-40 generated NDPCs.

关键词： Copolymer Aromaticity Pyrolysis Carbon capture N-doped porous carbon

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Molecular cloning and functional identification of an apple flagellin receptor MdFLS2 gene

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Journal of Integrative Agriculture 2018年第12期17卷 2694-2703页

作者： qi Chen-hui ZHAO Xian-yan JIANG Han liu Hai-tao WANG Yong-xu HU Da-gang HAO Yu-jin National Key Laboratory of Crop Biology/Key Laboratory of Horticultural Crop Biology and Germplasm Innovation Ministry of Agriculture and Rural Affairs of China/College of Horticulture Science and Engineering Shandong Agricultural University Shandong Yihui Detection Technology Co. Ltd.

The leucine-rich repeat receptor kinase flagellin-sensing 2 gene(MdFLS2; Gene ID: MDP0000254112) was cloned from Royal Gala apple(Malus×domestica Borkh.). This gene contained a complete open reading frame of 3 474 bp that encoded 1 158 amino acids. The phylogenetic tree indicated that Prunus persica FLS2 exhibited the highest sequence similarity to MdFLS2. The PlantCare database suggests that the promoter sequence of MdFLS2 contains several typical cis-acting elements, including ethylene-, gibberellin-, salicylic acid-, and drought-responsive elements. Quantitative real-time PCR analysis showed that MdFLS2 was widely expressed in the different tissues of the apple and most highly expressed in the leaves. Furthermore, MdFLS2 was significantly induced by the flagellin elicitor peptide flg22. Treatment of the apple seedling leaves with flg22 resulted in an increase in leaf callose levels with increased treatment duration. An increase in the production of Oalong with the expression of disease-related genes was also observed. An oxidative burst was detected in the treated seedlings, but not in the control seedlings, indicating that flg22 had stimulated the expression of the MdFLS2 gene and its downstream target genes. Furthermore, the ectopic expression of MdFLS2 complemented the function of the Arabidopsis fls2 mutant and conferred enhanced flg22 tolerance to the transgenic Arabidopsis, suggesting that MdFLS2 acts as a positive regulator in the response to pathogens in apple.

关键词： apple flagellin receptor flagellin elicitor peptide MdFLS2 pathogen infection

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Kai-Xin-San regulates synaptic plasticity through calcium signaling to alleviate symptoms of depression-like behavioral disorders in mice

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Traditional Medicine Research 2023年第8期8卷 1-17页

作者： Jia-Lin Wu Hua-Chong Xu Shi-qi Wang ya-Wen Jiang Guo-Sen Ou Li Deng Xiao-Yin Chen College of Traditional Chinese Medicine Jinan UniversityGuangzhou 510632China Guangzhou Key Laboratory of Formula-Pattern of Traditional Chinese Medicine Guangzhou 510632China

Background:Kai-Xin-San,a classical Chinese medicine prescription,has been widely applied in the clinical therapy for depression,but its pharmacological mechanism remains to be further *** on network pharmacology,molecular docking and animal experiments,the research is performed to exploit pharmacological mechanism of Kai-Xin-San for treating ***:Obtain chemical components and potential targets of Kai-Xin-San through Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,Encyclopedia of Traditional Chinese Medicine and Bioinformatics Analysis Tool for Molecular Mechanism of Traditional Chinese Medicine databases,and then screen the active ingredients of each herb in accordance with absorption,distribution,metabolism,and *** GenCards,Online Mendelian Inheritance in Man,Therapeutic Target database and DrugBank databases were used to obtain the major targets of depression,and the STRING platform was used to construct the protein-protein interaction network and explore the potential protein functional modules in the *** targets were subjected to Gene Ontology enrichment analysis and Kyoto Encyclopedia of Genes and Genomes pathway analysis by STRING database and Metascape *** interaction network of“Kai-Xin-San active components-depression-targets-pathways”was constructed by Cytoscape,and molecular docking verification was performed by Auto Dock ***,animal experiments were carried out for further *** chronic restraint stress depression model was established and mice were randomly divided into 4 groups:control group,chronic restraint stress group,fluoxetine group and Kai-Xin-San *** tests were used to evaluate the depressive phenotype of *** expression of CaMKII-,synaptophysin,poststroke depression-95,and CACNA1C were all detected using a western ***:Network analysis shows that Kai-Xin-San may mainly regulate calcium signaling pathway to exert ant

关键词： Kai-Xin-San depression network pharmacology molecular docking calcium signaling

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Meta analysis of olfactory ensheathing cell transplantation promoting functional recovery of motor nerves in rats with complete spinal cord transection

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Neural Regeneration Research 2014年第20期9卷 1850-1858页

作者： Jun liu Ping Chen qi Wang Yu Chen Hailong Yu Junxiong Ma Mingming Guo Meihui Piao Weijian Ren Liangbi Xiang Department of Orthopedics General Hospital of Shenyang Military Command Area of Chinese PLA Department of Gastroenterology Taian Central Hospital

OBJECTIVE： To evaluate the effects of olfactory ensheathing cell transplantation on functional recovery of rats with complete spinal cord transection. DATA SOURCES： A computer-based online search of Medline （1989-2013）, Embase （1989- 2013）, Cochrane library （1989-2013）, Chinese Biomedical Literature Database （1989-2013）, China National Knowledge Infrastructure （1989-2013）, VIP （1989-2013）, Wanfang databases （1989-2013） and Chinese Clinical Trial Register was conducted to collect randomized controlled trial data regarding olfactory ensheathing cell transplantation for the treatment of complete spinal cord transection in rats. SELECTION CRITERIA： Randomized controlled trials investigating olfactory ensheathing cell transplantation and other transplantation methods for promoting neurological functional recov- ery of rats with complete spinal cord transection were included in the analysis. Meta analysis was conducted using RevMan 4.2.2 software. MAIN OUTCOME MEASURES： Basso, Beattie and Bresnahan scores of rats with complete spinal cord transection were evaluated in this study. RESULTS： Six randomized controlled trials with high quality methodology were included. Meta analysis showed that Basso, Beattie and Bresnahan scores were significantly higher in the olfacto- ry ensheathing cell transplantation group compared with the control group （WMD = 3.16, 95% （21 （1.68, 4.65）; P 〈 0.00001）. CONCLUSION： Experimental studies have shown that olfactory ensheathing cell transplantation can promote the functional recovery of motor nerves in rats with complete spinal cord transection.

关键词： nerve regeneration olfactory ensheathing cells cell transplantation spinal cord injury complete transection BBB scores meta analysis

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Cloud-assisted cognition adaptation for service robots in changing home environments

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Frontiers of Information Technology & Electronic Engineering 2022年第2期23卷 246-257页

作者： qi WANG Zhen FAN Weihua SHENG Senlin ZHANG Meiqin liu College of Electrical Engineering Zhejiang UniversityHangzhou 310027China School of Electrical and Computer Engineering Oklahoma State UniversityStillwaterOK 74078USA Institute of Artificial Intelligence and Robotics Xi’an Jiaotong UniversityXi'an 710049China

Robots need more intelligence to complete cognitive tasks in home *** this paper,we present a new cloud-assisted cognition adaptation mechanism for home service robots,which learns new knowledge from other *** this mechanism,a change detection approach is implemented in the robot to detect changes in the user’s home environment and trigger the adaptation procedure that adapts the robot’s local customized model to the environmental changes,while the adaptation is achieved by transferring knowledge from the global cloud model to the local model through model ***,three different model fusion methods are proposed to carry out the adaptation procedure,and two key factors of the fusion methods are ***,the most suitable model fusion method and its settings for the cloud–robot knowledge transfer are ***,we carry out a case study of learning in a changing home environment,and the experimental results verify the efficiency and effectiveness of our *** experimental results lead us to propose an empirical guideline of model fusion for the cloud–robot knowledge transfer.

关键词： Home service robot Cloud–robot knowledge transfer Model fusion

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