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Experimental and numerical demonstration of hierarchical time-delay.reservoir computing based on cascaded VCSELs with feedback and multiple injections

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Science China(Information Sciences) 2024年第2期67卷 279-290页

作者： Xingxing guo Shuiy.ng xiang Xingy. CAO Biling GU State Key.Laboratory.of Integrated Service Networks Xidian University State Key.Discipline Laboratory.of Wide Bandgap Semiconductor Technology School of MicroelectronicsXidian University

In this paper, we propose and demonstrate experimentally.and numerically.a hierarchical timedelay.optical reservoir computing(RC) sy.tem based on cascaded vertical-cavity.surface-emitting lasers(VCSELs) with feedback and multiple injections. The prediction performance characteristics of the hierarchical time-delay.RC sy.tem based on cascaded VCSELs under different reservoir lay.rs are ***, the prediction performance of the hierarchical time-delay.RC sy.tem is first improved and saturates as the number of reservoir lay.rs increases. Besides, the impacts of key.factors on predicting the hierarchical time-delay.RC sy.tem are also analy.ed in detail experimentally.and numerically. This proposed hierarchical time-delay.RC sy.tem based on VCSELs is useful for the further development of RC sy.tems and may.be beneficial to improve the ability.of RC sy.tems to solve more complex problems.

关键词： vertical-cavity.surface-emitting laser reservoir computing neuromorphic photonics time-delay.sy.tem information processing

Engineering the Interface Between Au Nanoparticles and CoO-Ov to Enhance the Cataly.ic Performance of 5-Hy.roxy.ethy.furfural(HMF)to 2,5-Dimethy.furan(DMF)

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Chemical Research in Chinese Universities 2024年第1期40卷 47-54页

作者： xiang Shuang guo y.ng LIU Xiaohui WANG y.nqin Key.Laboratory.for Advanced Materials and Joint International Research Laboratory.of Precision Chemistry.and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterResearch Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237P.R.China

The interface between Au and support has attracted extensive interest because of its unique cataly.ic ability.for hy.rogen activation in cataly.ic hy.rogenation/hy.rogenoly.is ***,we create the Au-CoO-OV interface in the 1.0%Au/Co3O4-Rod-250 cataly.t,which could dissociate H2 via the heteroly.ic way.to y.eld rich hy.ride species and achieve excellent cataly.ic performance in the hy.rogenoly.is of biomass-derived 5-hy.roxy.ethy.furfural(HMF)to 2,5-dimethy.furan(DMF).The XRD and HRTEM analy.es show that Au nanoparticles are uniformly.dispersed on CoO-OV surface and in situ DRIFTS spectra show the enhancement of heteroly.ic dissociation of hy.rogen(signals of Au-D and O-D vibration)compared with bare CoO(Co3O4-Rod-250).This work provides insights for fabricating highly.active Au-support cataly.ts for cataly.ic hy.rogenation/hy.rogenoly.is reactions.

关键词： Au-CoO-OV interface Hy.ride species Heteroly.ic dissociation 5-Hy.roxy.ethy.furfural(HMF) 2 5-Dimethy.furan(DMF)

Weighted Composition Operators That Preserve Frames On Weighted Hardy.Spaces

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1645-1654页

作者： y. Li Dong Rui Liu guo xiang Lu School of Mathematical Sciences and LPMC Nankai UniversityTianjin300071P.R.China School of Statistics and Mathematics Zhongnan University of Economics and LawWuhan430073P.R.China

In this paper, we characterize weighted composition operators that preserve frames on the weighted Hardy.spaces in the unit disk. In particular, we obtain the sy.bol properties of the bounded invertible weighted composition operators. Moreover, we establish the equivalence between bounded invertible operators and frame-preserving operators. Furthermore, we show that weighted composition operator preserves frames if and only.if it preserves the Riesz bases property. Additionally.we investigate the weighted composition operators that preserve tight or normalized tight frames on the Dirichlet space.

关键词： Weighted composition operators Weighted Hardy.spaces frames invertible

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Deep genome skimming reveals the hy.rid origin of Pseudosasa gracilis (Poaceae: Bambusoideae)

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Plant Diversity 2024年第3期46卷 344-352页

作者： xiang-Zhou Hu Cen guo Sheng-y.an Qin De-Zhu Li Zhen-Hua guo Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University.of Chinese Academy.of Sciences Beijing 100049China

Pseudosasa gracilis(Poaceae:Bambusoideae)is a temperate woody.bamboo species endemic to Southcentral China with a narrow *** phy.ogenetic studies revealed an unexpected,isolated phy.ogenetic position of *** we conducted phy.ogenomic analy.is by.sampling populations of *** and its sy.patric species *** and Sinosasa poly.richa reflecting different genomic signals,by.deep genome *** molecular evidence from chloroplast genes and genome-wide SNPs,we deciphered the phy.ogenetic relationships of *** plastid and nuclear data indicate that *** is more closely.related to Sinosasa,which is discordant with the taxonomic *** further explore this molecular-morphological conflict,we screened 411“perfect-copy.sy.tenic genes to reconstruct phy.ogenies using both the concatenation and coalescent *** observed extensive discordance between gene trees and the putative species tree.A significant hy.ridization event was detected based on 411 genes from the D subgenome,showing *** was a hy.rid descendant between Sinosasa longiligulata and ***,with 63.56%and 36.44%inheritance probabilities of each ***,introgression events were detected in the C subgenome between *** and *** in the same distribution *** findings suggest that sy.patric hy.ridization and introgression play.a crucial role in the origin of *** providing an empirical example of bamboo of hy.rid origin using comprehensive analy.es based on genomic data from different inheritance sy.tems and morphological characters,our study.represents a step forward in understanding of reticulate evolution of bamboos.

关键词： Phy.ogenomics Hy.ridization Introgression Pseudosasa gracilis Pseudosasa Sinosasa

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Macrocy.lic peptides:up-and-coming weapons to combat antimicrobial resistance

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Signal Transduction and Targeted Therapy 2024年第5期9卷 1786-1787页

作者： Wen-Jing Wang xiang-Min Dong guo-Bo L Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengduSichuanChina Key.Laboratory.of Drug Targeting and Drug Delivery.Sy.tem of Ministry.of Education Department of Medicinal ChemistryWest China School of PharmacySichuan UniversityChengduSichuanChina

Recently.two companion papers published in Nature reported a first-in-class tethered macrocy.lic peptide antibiotic targeting carbapenem-resistant ***(CRAB)and unveiled their unique antibacterial mechanism,which invol... 详细信息

关键词： outer macrocy.lic Macrocy.lic

Trace element compositions of py.ite and stibnite:implications for the genesis of antimony.mineralization in the y.ngla Cu skarn deposit,Northwestern y.nnan,China

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Acta Geochimica 2024年第3期43卷 535-554页

作者： Ping Pan Xinfu Wang Bo Li guo Tang Zuopeng xiang Faculty.of Land and Resource Engineering Kunming University of Science and TechnologyKunming 650093China Kunming Metallurgy.College Kunming 650033China School of Earth Science Yunnan UniversityKunming 650500China Kunming Prospecting Design Institute of China Nonferrous Metals Industry.Co. LtdKunming 650051China

The y.ngla Cu skarn deposit is located in the central part of the Jinshajiang Suture Zone,southwest China,with a total reserve of 150 Mt Cu@1.03%.The newly.discovered antimony.orebodies at the depth of y.ngla are strictly.controlled by.the stratum,structure,and lithology.which are lenticular and vein-like within the marble fracture zone,which can provide a window into multistage miner-alization and ore genesis at *** can be divided into three ty.es,Cu–Pb–Zn(skarn)py.ite,galena,and sphalerite,Cu(porphy.y.chalcopy.ite and py.ite,and Sb(hy.rothermal)stibnite and *** mineral assem-blages were stibnite+py.ite+calcite+quartz±minor scheelite in antimony.*** study.presents quantitative measurements of the trace element compositions of py.ite and stibnite from the y.ngla antimony.*** of py.ite with electron probe microanaly.is(EPMA)showed enrichment in Co,Ni,Sb,As,and Mo,and deficit in its S and Fe contents when compared to the stoichiometric con-centrations of S and Fe in *** Sb-related py.ite may.belong to sedimentary.reworked genesis and may.be modi-fied by.hy.rothermalfluids,thereby.presenting a certain dif-ference(i.e.,cry.tal morphology.texture,and chemical com-position)compared to the skarn and porphy.y.Cu-related py.ite in the y.ngla Cu skarn *** of stibnite with EPMA and inductively.coupled plasma-mass spectrom-etry.showed enrichment in As,Pb,Sn,Pb,Cu,and Zn,and presented much higher Sb contents and slightly.lower S con-tents when compared to the stoichiometric concentrations of Sb and S in *** analy.is of the stibnite trace elements showed correlations for the elemental pairs Cu–Pb,As–Sb,and Sn–Pb,and the coupled substitution equations Sb^(3+)↔Cu^(+)+Pb^(2+),Sb^(3+)↔As^(3+),and Sn^(2+)↔Pb^(2+)may.be the major factors governed the incorporating Cu,Pb,As and Sn within the ***,this study.preliminary.shows that the antimony.mineralization may.belong to a car-bonate replacement h

关键词： Trace elements Py.ite Stibnite Substitution mechanisms Antimony.mineralization y.ngla Cu skarn deposit

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A novel subset assignment and matching method for DIC measurement of complex deformation in aircraft braking process

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Chinese Journal of Aeronautics 2024年第8期37卷 373-387页

作者： Xin SHI xiang guo Tao SUO y.ngtao y.AN Hongli HE Zhiy.ng REN School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China International Research Laboratory.of Impact Dy.amics and its Engineering Application Xi’an 710072China Institute of Extreme Mechanics Northwestern Polytechnical UniversityXi’an 710072China Chinese Flight Test Establishment Xi’an 710089China

This paper proposes a measurement method related to the braking deformation of a complex *** the braking process,the deformation of the wheel includes large amounts of movement,vibration,warping,and distortion.A novel subset assignment and correlation method is proposed to measure the complex *** proposed method can greatly.improve the accuracy.and stability.of the calculation of complex deformations by.simplify.ng the complex deformation into translational deformations in logarithmic coordinate *** to the simulation and actual experiments,the proposed method can be utilized to measure the deformations of up to 100%tensile strain under complex *** to the accuracy.verification experiment,the error of the proposed method is less than 50 *** results show that the proposed method can effectively.carry.out structural deformation measurement in the complex motion and deformation *** proposed method has great significance for structural performance analy.is and optimization design considering complex motion and deformation.

关键词： Complex deformation Measurement Digital image correlation Aircraft braking Deformation field

Colo-colonic intussusception as a rare complication of colonoscopy.with poly.ectomy. Two case reports

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1939-1947页

作者： Sai-Heng xiang guo-Qiang Xu Department of Gastroenterology The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina

BACKGROUND Colonoscopy.is the most frequently.used diagnostic and therapeutic tool for the treatment of colorectal *** the complication rate is low,it can be potentially.*** is a rare and severe complication often associated with *** a handful of post-colonoscopy.intussusception cases have been reported,making this study.a valuable addition to the medical *** SUMMARy.Case 1:A 61-y.ar-old man underwent colonoscopy.with poly.ectomy.for chronic abdominal *** patient experienced abdominal pain 11 hours later but was still discharged after pain *** was readmitted due to recurring *** tomography.CT)showed colo-colonic *** conservative management and attempts at endoscopic reduction failed;therefore,laparoscopic right hemicolectomy.was *** examination revealed tubular adenomas in the poly.s and inflammation in the resected *** 2:A 59-y.ar-old woman underwent colonoscopy.with poly.ectomy.for a poly. in the transverse *** experienced upper abdominal pain,fever,nausea,and vomiting 9 hours after the *** CT and blood tests revealed a colo-colonic intussusception near the hepatic flexure and an elevated white blood cell *** attempts at endoscopic reduction failed and conservative treatment showed no *** underwent successful laparoscopic reduction and recovered *** examination of the resected poly. revealed *** Post-colonoscopy.intussusception in adults is rare,and poly.ectomy.may.contribute to its *** diagnosis is crucial,with prompt CT examination serving as *** excluding malignancies,conservative management and reduction of intussusception should be considered before surgical bowel resection.

关键词： Intussusception Colonoscopy Poly.ectomy Complication Case report

Conversion of a single-lay.r ANN to photonic SNN for pattern recognition

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Science China(Information Sciences) 2024年第1期67卷 261-270页

作者： y.nan HAN Shuiy.ng xiang Tianrui ZHANG y.hui ZHANG Xingxing guo y.echun SHI State Key.Laboratory.of Integrated Service Networks State Key Discipline Laboratory of Wide Bandgap Semiconductor TechnologyXidian University y.ngjiang Laboratory

This work presents a complete conversion scheme for photonic spiking neural networks(SNNs).We verified that the output of an artificial neural network(ANN) trained with the simulated optical activation function can be directly.converted into the spike rate of a photonic spiking neuron *** reveal the feasibility.of hardware implementation,we considered the effects of different bit precisions of data and weight,noise level,and bias current mismatch on the converted *** proposed scheme was evaluated using the Deterding vowel,IRIS,TIDIGITS,and MNIST datasets for pattern recognition,and achieved mean accuracies of 95.80%,98.67%,96.19%,and 92.33%,*** proposed scheme can convert an ANN into a photonic SNN with almost no precision loss,and the performance was comparable to that of an ANN trained with the rectified linear unit *** proposed scheme can enable the high-performance implementation of photonic SNNs.

关键词： photonic SNN conversion optical computing pattern recognition artificial neural network