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Asymmetrical introgression patterns between rusty-necklaced partridge (Alectoris magna) and chukar partridge (Alectoris chukar) in China

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Integrative Zoology 2016年第5期11卷 403-412页

作者： Yanke CHEN bei AN Naifa LIU Experiment Center of Biomedical Research School of Medicine Xi’an Jiaotong UniversityXi’anChina School of Life Sciences Lanzhou UniversityLanzhouChina

The rusty-necklaced partridge(Alectoris magna)and the chukar partridge(Alectoris chukar)are the most common gamebirds in northern *** comparisons of mitochondrial DNA(mtDNA)have revealed an introgression phenomenon between 2 species of partridge in the Liupan Mountain region of *** is maternally inherited,making it difficult to determine the origin of parental *** assessed the genetic variation and gene flow between these 2 species of partridges using 8 microsatellite loci as neutral diagnostic markers in 171 samples from the hybrid *** data revealed an extensive divergence of genetic structure between populations of rusty-necklaced partridges and chukar *** this study,we found that 19 samples had been previously morphologically identified as rusty-necklaced partridge were genetically identified as hybrids through Bayesian analysis using STRUCTURE *** hybrids exhibited a mosaic of alleles that were derived from both parental ***,chukar partridges did not present the genotype of the rusty-necklaced ***,our findings demonstrate that the hybridization between the 2 species was the result of asymmetrical introgression,with gene flow occurring only from the chukar partridge to the rusty-necklaced par*** addition,we also note the high linkage disequilibrium in populations of the rusty-necklaced *** results indicate that although unidirectional introgression did not reduce genetic diversity of the Alectoris partridges,it affected the balance of gene flow between *** data from microsatellite DNA prompted our concern about the genetic integrity of the rusty-necklaced partridge.

关键词： chukar partridge(Alectoris chukar) hybridization introgression microsatellite DNA rustynecklaced partridge(Alectoris magna)

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Crown-Like Baffle System against Rock Avalanches:Energy Dissipation Mechanism and Numerical Verification

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Journal of Earth Science 2023年第2期34卷 304-315页

作者： Yu Huang Hao Shi bei Zhang Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education Tongji UniversityShanghai 200092China

In mountainous areas,rock avalanches swarm downslope leading to large impact forces on *** systems are usually set up in torrent channels to dissipate the flow energy and reduce the destructive *** this paper,a crown-like baffle system is proposed to better dissipate the flow *** energy dissipation mechanism of this system was investigated based on *** results reveal more than 90%of the kinetic energy of the granular flow was dissipated by particleparticle *** effects,the impedance effect and the deflection effect,were *** influence of these effects leads to the formation and growth of cushions behind the baffles,and these cushions enhance the particle-particle *** crown-like baffle systems were compared with a conventional baffle system based on the typical avalanche *** results reveal the cumulative residual kinetic energy of the crown-like baffle system with square baffles decreased by 18.75%with the same concrete consumption as the conventional baffle *** the crown-like baffle system with triangular baffles,the cumulative residual kinetic energy decreased by 6.22%with 83.94%of the concrete consumption of the conventional baffle ***,the proposed baffle system is more cost-effective compared with the conventional baffle system.

关键词： rock avalanches new baffle system energy dissipation discrete element method engineering geology

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Tensor Polarization t20 of the Deuteron and the ρπγ Process

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Communications in Theoretical Physics 2001年第4期35卷 455-458页

作者： YETao CHENYan－bei 等 DepartmentofPhysics PekingUniversityBeijing100871China

Tensor Polarization t20 of the deuteron is calculated on the basis of a hybrid quark-hadron model.A relativistic wavefunction of the deuteron is used to calculate the relativistic impulse approximation and the contribution of the ρπγ meson exchange process.A good agreement with experimental data is achieved when and only when the ρπγ coupling is taken as positive.

关键词：夸克结构强相互作用氘核系统

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Regulation of the intermittent release of giant unilamellar vesicles under osmotic pressure

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Chinese Physics B 2022年第9期31卷 644-651页

作者： Qi Zhou Ping Wang bei-bei Ma Zhong-Ying Jiang Tao Zhu Key Laboratory of Micro-Nano Electronic Sensing Technology and Bionic Devices Yili Normal UniversityYining 835000China School of Network Security and Information Technology Yili Normal UniversityYining 835000China National Laboratory of Solid State Microstructures Department of PhysicsNanjing UniversityNanjing 210093China

Osmotic pressure can break the fluid balance between intracellular and extracellular *** hypo-osmotic so-lution,water molecules,which transfer into the cell and burst,are driven by the concentration difference of solute across the semi-permeable *** complicated dynamic processes of intermittent bursts have been previously ***,the underlying physical mechanism has yet to be thoroughly explored and ***,the intermittent re-lease of inclusion in giant unilamellar vesicles was investigated quantitatively,applying the combination of experimental and theoretical methods in the hypo-osmotic ***,we adopted a highly sensitive electron multiplying charge-coupled device to acquire intermittent dynamic ***,the component of the vesicle phospholipids af-fected the stretch velocity,and the prepared solution of vesicles adjusted the release ***,we chose equations and numerical simulations to quantify the dynamic process in phases and explored the influences of physical parameters such as bilayer permeability and solution viscosity on the *** was concluded that the time taken to achieve the balance of giant unilamellar vesicles was highly dependent on the molecular structure of the *** pore lifetime was strongly related to the internal solution environment of giant unilamellar *** vesicles prepared in viscous solution were able to visualize long-lived ***,the line tension was measured quantitatively by the release velocity of inclusion,which was of the same order of magnitude as the theoretical *** all,the experimental values well matched the theoretical *** investigation clarified the physical regulatory mechanism of intermittent pore forma-tion and inclusion release,which provides an important reference for the development of novel technologies such as gene therapy based on transmembrane transport as well as controlled drug delivery based on lipo

关键词： osmotic pressure difference membrane tension pore line tension

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Theoretical characterization of hole mobility in BTBPD

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Chinese Chemical Letters 2013年第10期24卷 945-948页

作者： Tie-Chao Jiang Zhong-Yu Wang bei-bei Du Shan-Shan Zhao China-Japan Union Hospital of Jilin University Jilin University State Key Laboratory of Supramolecular Structure and Materials Jilin University

（ E）-5,5＇-Bis（ 5-（ benzo[ b ]thiophen- 2-yl ）thiophen-2-yl ）-1,1＇-bis（ 2-ethylhexyl ）-[ 3,3＇-bipyrrolylidene ]- 2,2＇（1H, l＇H）-dione （BTBPD） has been reported by Zhang and co-workers. To further understand the charge-transporting nature of BTBPD, the density-functional theory （DFF） and the Marcus charge transfer theory were performed. The character of the frontier molecular orbitals, reorganization energies and transfer integrals in different directions were considered in details. The results revealed that the BTBPD has high hole transport efficiency （μ = 0.29 cm2 V-1 s-1 ）. The intermolecular π-π interaction and S...S interaction provide the holes transport channels.

关键词： BTBPD DFT Marcus charge transport theory

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Direct photolysis of N-methoxypyridiniums for the pyridylation of carbon/heteroatom-hydrogen bonds

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Science China Chemistry 2022年第12期65卷 2494-2499页

作者： He Sheng bei-bei Zhang Qiang Liu Zhu-Sheng Yang Zhi-Xiang Wang Xiang-Yu Chen School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang550025China School of Chemical Sciences University of the Chinese Academy of SciencesBeijing100049China

Current synthetic methods for the functionalization of pyridinium salts usually rely on transition metals,oxidants and/or *** date,no direct photolysis method exists under photocatalyst-,transition metal-and oxidant-free *** herein demonstrate the first direct photolysis of N-methoxypyridinium salts for the selective assembly of various pyridines by using a series of common feedstocks,including amine-boranes,unactivated alkanes,phosphine oxides,amides,silanes and aldehydes.

关键词： photolysis N-methoxypyridiniums hydrogen atom transfer pyridines

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An Automatic Classification Pipeline for the Complex Synaptic Structure Based on Deep Learning

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Journal of Systems Science & Complexity 2022年第4期35卷 1398-1414页

作者： SHEN Lijun MA Chao LUO Jie HONG bei Faculty of Information Technology Macao University of Science and TechnologyMacaoTaipai999078China Faculty of Mathematics and Statistics Hubei UniversityWuhan430062China

As a hallmark of brain complexity,synapses in the nervous system have always received extensive *** diversity of the synaptic structure reflects various functions and mechanisms,some research indicates that,as one of the complex synaptic structures,multiple synapses can strengthen the synaptic connection,what’s more,it is closely associated with the procedure of memory and *** by the fast advancement of electron microscopy(EM)technology,it is possible to detect the composition of multiple synapse with high *** this basis,there have been various meaningful studies concerning the relationship between the multiple synapse and cognitive *** the extensive studies have been made by different researchers on multiple synapse,no attention has been paid to the classification accuracy of the type of multiple *** current research puts forward an effective method for the automatic classification of multiple synapse,which should be performed in three steps,namely the segmentation of synaptic clefts,the segmentation of vesicle bands,as well as the segmentation of multiple *** to experimental results based on four data sets,the mean classification rate of the method is approximately 97%.In addition,the experimental result on the public dataset shows that the accuracy can reach 96.5%.The classification results provide a basis for quantitative statistics of follow-up ***,this automatic classification method can reduce the time in artificial statistics,and thus researchers can focus more attention on the analysis of statistical results.

关键词： Classification deep learning electron microscopy multiple synapses synaptic cleft vesicle band

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Ubiquitous indoor vision navigation using a smart device

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Geo-Spatial Information Science 2013年第3期16卷 177-185页

作者： bei HUANG Yang GAO Department of Geomatics Engineering University of Calgary2500 University Dr.NWCalgaryAlberta T2N 1N4Canada

GPS-based technology has served the positioning and navigation industry for decades with outstanding reliability and ***,limitations for location-based services in indoor scenarios remain where GPS signal reception suffers from severe degradation or even ***-Fi-based positioning is currently the most popular indoor location solution,with an availability and time-to-first-fix that are significantly better than ***,the achievable position accuracy is only at the level of tens of meters on average depending on database density and signal reception *** order to improve positioning accuracy and availability,motion sensors like accelerometers,gyros,and magnetic compasses are increasingly integrated into smart ***,their position solutions suffer from the effects of significant accumulative *** this paper,a vision-based indoor positioning method is developed to overcome the limitations *** proposed vision-based system relies on a single camera,widely available on smart phones and *** derivation of the absolute 3D position from 2D snapshots of a single camera requires the use of an external geo-reference *** this research,a ubiquitous floor plan database has been used to provide accurate geodetic *** other popular geo-reference databases,the database used in this work can easily be generated with existing *** proposed system has been developed as an iOS App and was tested on iPad for various indoor *** results show that the performance of the proposed system is superior to Wi-Fi-based positioning systems.

关键词： indoor positioning vision navigation geo-reference augmented reality

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Recent advances in g-CN-based heterojunction photocatalysts

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Journal of Materials Science & Technology 2020年第21期56卷 1-17页

作者： Yunfeng Li Minghua Zhou bei Cheng Yan Shao College of Environmental and Chemical Engineering Xi’an Polytechnic UniversityXi’an710000China Hubei Key Laboratory of Wudang Local Chinese Medicine Research Hubei University of MedicineShiyan 442000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Outpatient Taihe HospitalHubei University of MedicineShiyan 442000China

Semiconductor heterojunction photocatalysts have received much concern due to their great application prospect in solar energy utilization and *** construction of heterostructure with two or more semiconductor materials can integrate the advantages of multi-components to simultaneously improve the photo-induced charges separation,extend visible light absorption range and retain the high redox ability of ***,constructing of g-C3 N4-based heterostructure has become a hot focus due to the multiple merits of g-C3 N4,such as facile synthesis,high stability,unique optical and electronic *** review tries to give a comprehensive introduction and provide the possible tendency in design and fabrication of g-C3 N4-based heterojunction photocatalysts,especially in rational synthesis of type-II heterojunction,direct Z-scheme heterojunction,new type of S-scheme heterojunction,p-n heterojunction and Schottky ***,the special charges transfer mechanisms of g-C3 N4-based heterojunctions are discussed and their potential applications in photocatalytic water splitting,photo-degradation of contaminants and photo-reduction of CO2 into fuels are also ***,we attempt to propose some crucial issues based on the current research,which should be further investigated and resolved in this interesting research area.

关键词： Photocatalysis g-C3N4 Heterojunction Z-scheme S-scheme

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Developing a reliable route protocol for mobile self-organization networks

High-Confidence Computing

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High-Confidence Computing 2024年第3期4卷 1-12页

作者： Shaohu Li bei Gong Faculty of Information Technology Beijing University Of TechnologyBeijing 100124China

Mobile ad hoc networks(MANETs),which correspond to a novel wireless technology,are widely used in Internet of Things(IoT)systems such as drones,wireless sensor networks,and military or disaster relief *** the perspective of communication and data collection,the success rate of collaborations between nodes in mobile ad hoc networks and reliability of data collection mainly depend on whether the nodes in the network operate normally,namely,according to the established network ***,mobile ad hoc networks are vulnerable to attacks targeting transmission channels and nodes owing to their dynamic evolution,openness,and distributed ***,during the network operation,it is necessary to classify and detect the behavior and characteristics of each ***,most existing research only analyzes and considers responses against a single or small number of *** address these issues,this article first systematically analyzed and classified common active attacks in ***,a node trust model was proposed based on the characteristics of various attacks;subsequently,a new secure routing protocol,namely,TC-AODV,was *** protocol has minimal effect on the original communication dynamics and can effectively deal with Packet drop,wormhole,Session hijacking,and other main attacks in *** NS3 simulation results show that the proposed routing protocol attains good transmission performance,can effectively identify various attacks and bypass malicious nodes,and securely complete the communication process.

关键词： Mobile ad hoc networks AODV Trust level Secure routing protocol Reliable path

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