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Journal of Earth Science 2020年第2期31卷 237-248页

作者： Tong Li Liang Liu Xiao-Ying Liao yong-sheng gai Tuo Ma Chao Wang State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China

Mafic dyke swarm is widely developed in Proterozoic continental *** Gangou diabase dyke from the Xixia area,intruded into the Douling complex of the South Qinling belt,yields zircon UPb age of 731 *** has low SiO2 content(49.02 wt.%-49.37 wt.%)and Mg^#(34.0–37.7)and shows characteristics of subalkaline tholeiite *** show highΣREE(155.5×10^-6–184.7×10^-6),weak negative Eu anomaly(δEu=0.88-0.93),slight depletion of Nb and Ta,and enrichment of *** major and trace element,Sr-Nd-Pb isotope and clinopyroxene compositions indicate that it originated from the partial melting of the asthenospheric mantle within-plate extension setting and was slightly contaminated by crust *** similarities of formation age,petrogenesis,source characteristic and tectonic setting for Gangou diabase with mafic dykes in Wudang Block and mafic volcanic rocks in Yaolinghe Group indicate that the South Qinling belt underwent strong continental extension in Neoproterozoic during 796–685 Ma most likely correspondence to the breaking-up of the Rodinia supercontinent.

关键词： Douling complex diabase dyke LA-ICP-MS zircon U-Pb dating Sr-Nd-Pb isotope Rodinia supercontinent break-up

Computation of rolling resistance caused by rubber hysteresis of truck radial tire

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第5期8卷 778-785页

作者： MA gai-ling XU Hong CUI Wen-yong College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing 100029 China

Applying the results of stress and strain calculated by 3D finite element model of truck radial tire 11.00R20, a MATLAB program used to compute rolling resistance of the tire caused by hysteresis rolling resistance (HRR) is worked out. The HRR distribution on different part of tire section, and the effects of speed, load, internal pressure and the width of the rim on HRR are analyzed. The analysis results showed that energy loss produced by tread rubber contributes the most part to HRR of the whole tire, and that to decrease the HRR, the hysteresis factor of the tread rubber should be reduced, and the distribution of the stress and strain on the section be optimized.

关键词： Truck radial tire Hysteresis rolling resistance (HRR) Finite element analysis (FEA) Hysteresis factor Tire structuredesign

Temporal continuity of visual attention for future gaze prediction in immersive virtual reality

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Virtual Reality & Intelligent Hardware 2020年第2期2卷 142-152页

作者： Zhiming HU sheng LI Meng gai Department of Computer Science and Technology School of Electronic Engineering and Computer SciencePeking UniversityBeijing 100871China Beijing Engineering Technology Research Center of Virtual Simulation and Visualization Peking UniversityBeijing 100871China

Background Eye tracking te chnology is receiving increased attention in the field of virtual ***,future gaze prediction is crucial in pre-computation for many applications such as gaze-contingent rendering,advertisement placement,and content-based *** explore future gaze prediction,it is necessary to analyze the temporal continuity of visual attention in immersive virtual *** In this paper,the concept of temporal continuity of visual attention is ***,an autocorrelation function method is proposed to evaluate the temporal ***,the temporal continuity is analyzed in both free-viewing and task-oriented *** Specifically,in free-viewing conditions,the analysis of a free-viewing gaze dataset indicates that the temporal continuity performs well only within a short time interval.A task-oriented game scene condition was created and conducted to collect users'gaze *** analysis of the collected gaze data finds the temporal continuity has a similar performance with that of the free-viewing *** continuity can be applied to future gaze prediction and if it is good,users'current gaze positions can be directly utilized to predict their gaze positions in the *** The current gaze's future prediction performances are further evaluated in both free-viewing and task-oriented conditions and discover that the current gaze can be efficiently applied to the task of short-term future gaze *** task of long-term gaze prediction still remains to be explored.

关键词： Temporal continuity Visual attention Autocorrelation analysis Gaze prediction Virtual reality

A Note about Minimal Hypercones

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Acta Mathematica Sinica,English Series 2021年第11期37卷 1794-1802页

作者： yong sheng ZHANG School of Mathematical Sciences&IAS Tongji UniversityShanghai 200092P.R.China

This short note is concerned with a measure version criterion for hypersurfaces to be *** natural flows and associated reflections for many minimal hypercones,including minimal isoparametric hypercones and area-minimi... 详细信息

关键词： Minimal hypercone measure invariant flow foliation

Classification and Early Warning Model of Terrorist Attacks Based on Optimal GCN

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Chinese Journal of Electronics 2020年第6期29卷 1193-1200页

作者： FENG yong gai Ming WANG Fuhai WANG Rongbing XU Xiaowei College of Information Liaoning University Department of Information Science University of Arkansas at Little Rock

Aiming at the lack of effective quantitative model to support the analysis of terrorist attacks,a multilayer depth Neural network(NN) Graph convolutional networks(GCN) model(NNGCN) was put forward to realize the classification and early warning of terrorist *** proposed model optimized the traditional GCN with the help of complex *** concept of link index was introduced into the NNGCN *** is combined with the important information between event *** information includes the similarity of events and link *** with the original unoptimized model,the improved model increased the classification accuracy of terrorist *** the model uses the node’s feature information and the link relationship of graph structure,it can also warn the sudden terrorist attacks effectively.

关键词： graph theory neural nets optimisation probability terrorism graph structure multilayer depth neural network graph convolutional network model optimal GCN early warning model terrorist attacks classification accuracy unoptimized model NNGCN model effective quantitative model Terrorist attack Correlation analysis Classification Early warning Link index GCN

Feedback processing in the primate brain and in AI systems

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Science China(Technological Sciences) 2024年第8期67卷 2297-2309页

作者： JIANG yong HE sheng Institute of Biophysics Chinese Academy of SciencesBeijing 100101China Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230088China University of Chinese Academy of Sciences Beijing 100049China

The primate brain and artificial intelligence(AI) can both be conceptualized as information processing systems, each with its own distinct biological and computational architectures. While there are parallels between them, their respective structural and functional connections show significant differences. In this paper, we examine the central role of feedback processing in both the primate brain and AI systems, which has been shown to be crucial in shaping neural processing. By reviewing the key features of feedback processes in the primate brain, which allows the brain to incorporate prior knowledge, contextual information, and taskdemands into early-stage processing, we highlight the divergence in goals and functions between biological and AI *** these differences is crucial for elucidating the cognitive capabilities of the primate brain and for addressing computational challenges in AI. In advocating “Cognition-Inspired-Computation”, we suggest that integrating insights from feedback processing in the primate brain into AI research will offer potentially significant improvements for the advancement of AI systems.

关键词： cognitive neuroscience artificial intelligence feedback processing attention learning

On Lawson's Area-minimizing Hypercones

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Acta Mathematica Sinica,English Series 2016年第12期32卷 1465-1476页

作者： yong sheng ZHANG School of Mathematics and Statistics Northeast Normal University

We show the area-minimality property of all homogeneous area-minimizing hypercones in Euclidean spaces （classified by Lawlor） following Lawson＇s original idea in his 72＇ Trans. A.M.S. paper ＂The equivariant Plateau problem and interior regularity＂. Moreover, each of them enjoys （coflat） calibrations singular only at the origin.

关键词： Area-minimizing hypercone coflat calibration comass

Relative Derived Equivalences and Relative Homological Dimensions

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Acta Mathematica Sinica,English Series 2016年第4期32卷 439-456页

作者： sheng yong PAN Department of Mathematics Beijing Jiaotong UniversityBeijing 100044P.R.China Beijing Center for Mathematics and Information Interdisciplinary Sciences Beijing 100048P.R.China

Let A be a small abelian *** a closed subbifunctor F of Ext_A^1（-,-）,Buan has generalized the construction of Verdier’s quotient category to get a relative derived category,where he localized with respect to F-acyclic *** this paper,the homological properties of relative derived categories are discussed,and the relation with derived categories is *** Artin algebras,using relative derived categories,we give a relative version on derived equivalences induced by F-tilting *** discuss the relationships between relative homological dimensions and relative derived equivalences.

关键词： Relative derived category F-tilting complex relative derived equivalence relative homological dimension

（Co）Homology and Universal Central Extension of Hom-Leibniz Algebras

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Acta Mathematica Sinica,English Series 2011年第5期27卷 813-830页

作者： yong sheng CHENG Institute of Contemporary Mathematics & College of Mathematics and Information Science He'nan University Kaifeng 475004 P. R. China Wu Wen- Tsun Key Laboratory of Mathematics University of Science and Technology of China Hefei 230026 P. R. China Department of Mathematics Tongji University Shanghai 200092 P. R. China

Hom-Leibniz algebra is a natural generalization of Leibniz algebras and Hom-Lie algebras. In this paper, we develop some structure theory （such as （co）homology groups, universal central extensions） of Hom-Leibniz ... 详细信息

关键词： Hom-Leibniz algebra (co)homology theory central extension

High Strength Electrospun Single Copolyacrylonitrile(coPAN)Nanofibers with Improved Molecular Orientation by Drawing

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Chinese Journal of Polymer Science 2021年第2期39卷 174-180,I0006页

作者： Tang-Cheng Xu Dong-Hua Han yong-Mei Zhu gai-gai Duan Kun-Ming Liu Hao-Qing Hou Department of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang 330022China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Metallurgical and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

High-performance carbon nanofibers are highly dependent on the performance of their precursors,especially polyacrylonitrile(PAN).In this work,the copolymer of PAN(coPAN)was synthesized for electrospinning.A self-assembling set-up was used for the stretching of single coPAN *** and Raman spectroscopies were used to characterize the chemical structure of coPAN *** electron microscopy(SEM)and atomic force microscopy(AFM)were used to monitor the morphology of single coPAN nanofibers under different drawing ***-tensile test was used to determine the mechanical properties of single coPAN *** results indicated that the drawing led to an increase in degree of molecular orientation along the fiber axis from 0.656 to 0.808,tensile strength from 304 MPa to 595 MPa,and modulus from 3.1 GPa to 12.4 *** research would provide fundamental information of high-performance electrospun coPAN nanofibers and offer opportunities for the preparation of high-performance carbon nanofibers.

关键词： Single nanofiber Electrospinning Polyacrylonitrile Molecular orientation Mechanical property