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Inverse Limits in Representations of a Restricted Lie Algebra

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Acta Mathematica sinica,English series 2012年第12期28卷 2463-2474页

作者： yu Feng YAO Bin sHU Yi Yang LI Department of Mathematics Shanghai Maritime University Department of Mathematics East China Normal University school of Fundamental studies Shanghai University of Engineering Science

Let （g, [p]） be a restricted Lie algebra over an algebraically closed field of characteristic p 〉 O. Then the inverse limits of ＂higher＂ reduced enveloping algebras {uxs （g） I s ∈ N} with X running over g＊ make representations of g split into different ＂blocks＂. In this paper, we study such an infinite- dimensional algebra Ax （g）：=lim Uxs （g） for a given X C g＊. A module category equivalence is built between subcategories of U（g）-rnod and Ax（g）-mod. In the case of reductive Lie algebras, （quasi） generalized baby Verma modules and their properties are described. Furthermore, the dimensions of projective covers of simple modules with characters of standard Levi form in the generalized x-reduced module category are precisely determined, and a higher reciprocity in the case of regular nilpotent is obtained, generalizing the ordinary reciprocity.

关键词： Restricted Lie algebra reductive Lie algebra inverse limit projective module standard Levi form

simulation and experimental comparison of the performance of four-corner-readout plastic scintillator muon-detector system

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Nuclear science and Techniques 2024年第11期35卷 1-12页

作者： Lie He si-yuan Luo Xiang-Man Liu yu-Cheng Zou Hai-Feng Zhang Wan-Cheng Xiao yu-He Huang Xiao-Dong Wang school of Nuclear science and Technology University of South ChinaHengyang 421001China Key Laboratory of Advanced Nuclear Energy Design and safety(MOE) University of South ChinaHengyang 421001China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China school of Nuclear science and Technology University of Chinese Academy of SciencesBeijing 100049China school of Nuclear science and Technology Lanzhou UniversityLanzhou 730000China school of Physical sciences University of Science and Technology of ChinaHefei 230026China

Cosmic-ray muons are highly penetrating background-radiation particles found in natural *** this study,we develop and test a plastic scintillator muon detector based on machine-learning *** detector underwent muon position-resolution tests at the Institute of Modern Physics in Lanzhou using a multiwire drift chamber(MWDC)experimental *** the simulation,the same structural and performance parameters were maintained to ensure the reliability of the simulation *** Gaussian process regression(GPR)algorithm was used as the position-reconstruction algorithm owing to its optimal *** results of the Time Difference of Arrival algorithm were incorporated as one of the features of the GPR model to reconstruct the muon hit *** accuracy of the position reconstruction was evaluated by comparing the experimental results with Geant4 simulation *** the simulation,large-area plastic scintillator detectors achieved a position resolution better than 20 *** the experimental-platform tests,the position resolutions of the test detectors were 27.9 *** also analyzed factors affecting the position resolution,including the critical angle of the total internal reflection of the photomultiplier tubes and distribution of muons in the *** were performed to image both large objects and objects with different atomic *** results showed that the system could image high-and low-Z materials in the constructed model and distinguish objects with significant density *** study demonstrates the feasibility of the proposed system,thereby providing a new detector system for muon-imaging applications.

关键词： Monte Carlo simulation Muon tomography TDOA Machine learning Image reconstruction

Chiral Nematic Cellulose Nanocrystals-Magnetite Nanocomposite Films Displaying Magnet-modulated Circular Dichroism Activity

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Chemical Research in Chinese Universities 2021年第5期37卷 1067-1071页

作者： LI Ping yu Xu XU Yan state Key Laboratory of Inorganic synthesis&Preparative Chemistry College of ChemistryJilin UniversityChangchun130012P.R.China state Key Laboratory of supramolecular structure and Materials College of ChemistryJilin UniversityChangchun130012P.R.China

Chirality is omnipresent among biological materials,such as amino acids,sugars,and DNA[1].It plays a vital role in wide-ranging applications including biomedicine,nonlinear optics,and negative index metamaterials[2-4].The chiral structures of molecules and supramolecular systems may cause differential absorption of left-and right-handed circularly polarized light leading to circular dichroism(CD)activity.

关键词： Cellulose nanocrystal Magnetic nanoparticle selective reflection Circular dichroism Magnet

Power system transient stability assessment based on the multiple paralleled convolutional neural network and gated recurrent unit

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Protection and Control of Modern Power systems 2022年第1期7卷 586-601页

作者： shan Cheng Zihao yu Ye Liu Xianwang Zuo College of Electrical Engineering and New Energy China Three Gorges UniversityYichang 443002HubeiChina

In order to accurately evaluate power system stability in a timely manner after faults,and further improve the feature extraction ability of the model,this paper presents an improved transient stability assessment(TsA)method of CNN+*** comprises a convolutional neural network(CNN)and gated recurrent unit(GRU).CNN has the feature extraction capability for a micro short-term time sequence,while GRU can extract characteristics contained in a macro long-term time *** two are integrated to comprehensively extract the high-order features that are contained in a transient *** overcome the difficulty of sample misclassification,a multiple parallel(MP)CNN+GRU,with multiple CNN+GRU connected in parallel,is ***,an improved focal loss(FL)func-tion which can implement self-adaptive adjustment according to the neural network training is introduced to guide model ***,the proposed methods are verified on the IEEE 39 and 145-bus *** simulation results indicate that the proposed methods have better TsA performance than other existing methods.

关键词： Transient stability assessment MP CNN+GRU sample misclassification Improved focal loss function

Internal Multiple Prediction Based on Imaging Profile Prediction and Kirchhoff Demigration

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Journal of Ocean University of China 2019年第6期18卷 1360-1370页

作者： QIU Binhuang TAN Jun DAN Zhiwei yu Jiashun YAN Hongyan LIU Baohua yu Kaiben sONG Peng XIE Chuang College of Geophysics Chengdu University of TechnologyChengdu 610059China Laboratory for Marine Mineral Resource Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China CNOOC EnerTech-Drilling&Production Co. Data Processing Co.Zhanjiang 524057China Key Laboratory of submarine Geosciences and Prospecting Techniques Ministry of EducationQingdao 266100China College of Marine Geo-sciences Ocean University of ChinaQingdao 266100China National Deep sea Center Qingdao 266100China

This paper introduces an internal multiple prediction method based on imaging profile prediction and Kirchhoff ***,based on an inputted prestack time migration profile,the method predicts the prestack time migration profile that only includes internal multiples by inverse scattering series ***,the method uses velocity-weighted Kirchhoff demigration to create shot gathers that contains only internal *** multiple prediction based on the prestack time migration profile effectively reduces the computational cost of multiple predictions,and the internal-multiple shot gathers created by Kirchhoff demigration remarkably reduces the complexity of the practical *** multiple elimination can be conducted through the combined adaptive multiple subtraction based on event *** and field data tests show that the method effectively predicts internal multiples and possesses considerable potential in field data processing,particularly in areas where internal multiples develop seriously.

关键词： internal multiple prediction inverse scattering series method Kirchhoff demigration Kirchhoff prestack time migration

Nondestructive analysis by combined X-ray tomography on a synchrotron radiation facility

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Nuclear science and Techniques 2007年第5期18卷 257-260页

作者： DENG Biao yu Xiaohan LIAiguo XU Hongjie shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

A nondestructive X-ray analysis technique combining transmission tomography, fluorescence tomography and Compton tomography based on synchrotron radiation is described. This novel technique will be an optional experimental technique at ssRF's hard X-ray micro-focusing beamline under construction at present. An experimental result of combined X-ray tomography is obtained in NE-5A station of PF. The reconstructed images of test objects are given.

关键词： X线扫描图象重列同步加速器物理实验

significance of the auditory meatus inferior wall cartilage in the surgical treatment of congenital first branchial cleft anomalies in children

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World Journal of Pediatric surgery 2023年第4期6卷 276-281页

作者： Bo yu Ruiyang Zhu Yong Fu Bin Xu Lulu yu Jing Bi Department of ENT and Head&Neck surgery Children's HospitalZhejiang University School of MedicineHangzhouChina school of stomatology Zhejiang Chinese Medical UniversityHangzhouChina

Objective To investigate the clinical significance of the inferior wall cartilage of the auditory meatus in surgical treatment of congenital first branchial cleft anomalies(CFBCAs)in *** Twenty children diagnosed with CFBCAs who underwent surgery between December 2018 and June 2022 at our hospital were retrospectively analyzed and classified according to their Work lesion *** guiding significance of the inferior wall cartilage in the surgical treatment of CFBCAs was summarized by investigating the adjacent relationships of the surgical lesions with the external auditory canal and facial *** Of the 20 patients,16 were classified as Work type Ⅰ and 4 as Work type Ⅱ.The lesions were adjacent to the inferior wall cartilage of the auditory meatus in all *** type Ⅰ lesions were located in the upper lateral aspect and were not adjacent to the facial *** type Ⅱ lesions were located in the inferior-medial region of the facial *** lesions were completely resected in all *** patient experienced recurrence 3 months postoperatively because of a residual endochondral *** patients developed facial paralysis or other *** The inferior wall cartilage of the auditory meatus may help to the identify the initial lesion of the CFBCAs and can be regarded as a guiding anatomical *** lesions can be completely *** resection of Work type II first branchial cleft lesions,the surgical incision can be narrower,and can be precisely positioned with the assistance of endoscope.

关键词： auditory surgical congenital

Effect of seawater salinity on the synthesis of zeolite from coal fly ash

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Frontiers of Environmental science & Engineering 2014年第1期8卷 54-61页

作者： Yanqing yu XiaoHang LI Xiaolan ZOU Xiaobin ZHU Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate school Chinese Academy of Sciences Beijing 100049 China school of Environment Tsinghua University Beijing 100084 China state Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China

A novel method for the synthesis of zeolite was developed in this paper. The synthesis was carried out by hydrothermal activation after alkali fusion and coal fly ash （CFA） was used as raw material with seawater of different salinities. seawater salinity was varied from 32 to 88 for zeolite crystallization during the hydrothermal process. The results show that seawater salinity plays an important role in zeolite synthesis with CFA during hydrothermal treatment. The products were a mixture of NaX zeolite and hydroxysodalite; seawater salinity more strongly affected the crystallization than the type and chemical composition of the zeolites. The yield of CFA transformed into zeolite gradually rose with the increase in salinity, reaching a transformation rate of 48%--62% as the salinity increased from 32 to 88, respectively. The proposed method allows for the efficient disposal of by-products; therefore, the application of seawater in zeolite synthesis presents promising economic and ecological benefits.

关键词： coal fly ash (CFA) seawater salinity zeolitesynthesis

Quasi-shadowing Property on Random Partially Hyperbolic sets

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Acta Mathematica sinica,English series 2018年第9期34卷 1429-1444页

作者： Lin WANG Xin sheng WANG yu Jun ZHU school of Applied Mathematics Shanxi University of Finance and Economics Taiyuan 030006 P. R. China College of Mathematics and Information science Hebei Normal University Shijiazhuang 050024 P. R. China school of Mathematical sciences Xiamen University Xiamen 361005 P. R. China

Abstract In this paper we investigate the quasi-shadowing property for C1 random dynamical sys-terns on their random partially hyperbolic sets. It is shown that for any pseudo orbit {xk}＋∞ -∞ on a random partially hyperbolic set there exists a ＂center＂ pseudo orbit {Yk}＋∞ -∞ shadowing it in the sense that yk＋l is obtained from the image of yk by a motion along the center direction. Moreover, when the random partially hyperbolic set has a local product structure, the above ＂center＂ pseudo orbit{yk}＋∞ -∞ can be chosen such that yk＋1 and the image of yk lie in their common center leaf.

关键词： Quasi-shadowing property random partially hyperbolic set local product structure