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Character Sheaves for Classical Graded Lie Algebras

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Acta Mathematica Sinica,English Series 2024年第3期40卷 870-884页

作者： ting XUE School of Mathematics and Statistics University of MelbourneVIC 3010Australia Department of Mathematics and Statistics University of HelsinkiHelsinki 00014Finland

In this note we study.character sheaves for graded Lie algebras arising from inner automorphisms of special linear groups and Vinberg’s ty.e Ⅱ classical graded Lie algebras.

关键词： Graded Lie algebras character sheaves Fourier transform nilpotent orbits

Selective sy.thesis of heteroleptic PdAB-cages: modulating size-preference of supramolecular hosts via endo-functionalization

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Science China Chemistry 2024年

作者： Wen-Tao dai ting-ting Liu Qixia Bai Zhe Zhang Pingshan Wang Wei Lu Qi Zhang Key.Laboratory.of Green Chemistry.and Technology.of Ministry.of Education College of Chemistry Sichuan University Institute of Environmental Research at Greater Bay.Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of Education Guangzhou University

The size complementarity.between a host and a guest is a critical prerequisite for selective molecular recognition. Numerous artificial host sy.tems have been designed to achieve size-selective recognition and chemical transformations. However, the inherent challenge lies in the fixed selectivity.governed by.a size-exclusion mechanism dictated by.the host’s *** the selectivity.necessitates structural modifications of hosts. Examples of host sy.tems with modifiable sizeselectivity.are rare. In this study. we present an approach to modulating guest-selectivity.via endo-functionalization of supramolecular cavities. Heteroleptic Pd2A3B-cages are constructed with a Pd2A3precursor or directly.from palladium ions and relevant ligands. Furthermore, the simultaneous and selective formation of multiple hetero-cages was achieved by.simply.mixing PdIIand the free ligands in a one-pot reaction. The fidelity.of the assembly.process relies on cooperative steric control at the periphery.and within the cavity.of the hetero-cages, respectively. The central steric group also functions as the endohedral moiety. Variations of the endohedral groups facilitate facile and modular derivatization of the microenvironment within the cages, enabling the fine-tuning of guest binding affinities as evidenced by.titration experiments. This strategy.offers a new solution for the development of customized host structures.

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Near-field wideband beam training for ELAA with uniform circular array

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Science China(Information Sciences) 2024年第6期67卷 370-383页

作者： y.hao CHEN Linglong dai Department of Electronic Engineering Tsinghua UniversityBeijing National Research Center for Information Science and Technology (BNRist)

Extremely.large-scale antenna array.ELAA) at millimeter wave(mmWave) and Terahertz(THz)band has been considered a key.technology.for combating high attenuation in high-frequency.bands in future6G communications. Uniform circular array.(UCAs) have attracted much attention because of their ability.to provide flat beamforming gain at all angles. To realize efficient beamforming, beam training is widely.used to acquire channel state information. However, with a large antenna number, the beam training overhead in ELAA sy.tems becomes overwhelming. Moreover, with a large bandwidth, the beam defocus effect severely.degrades beam training accuracy. To address these issues, this paper proposes a frequency.dependent focusing(FDF)-based beam training scheme to realize effective beam training in near-field wideband ELAA sy.tems with UCA. Specifically. we first analy.e the FDF property.of UCA, where signals at different subcarriers can simultaneously.focus on different distances. Then, by.exploiting the FDF property.to search different distances using different subcarriers simultaneously. we design a hierarchical codebook and propose an FDFbased beam training scheme. To reveal the effectiveness of the proposed scheme, we compare its necessary.beam training overhead with that of existing schemes. Finally. the simulation results demonstrate that the proposed scheme can achieve accurate beam training in near-field wideband UCA sy.tems with a low beam training overhead.

关键词： extremely.large-scale antenna array.(ELAA) uniform circular array.(UCA) near-field wideband beam training

Seismic performance evaluation of water supply.pipes installed in a full-scale RC frame structure based on a shaking table test

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 163-178页

作者： Wu Houli Guo Endong Wang Jingy. dai Xin dai Chenxi Key.Laboratory.of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key.Laboratory.of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China

As an important part of nonstructural components,the seismic response of indoor water supply.pipes deserves much *** paper presents shaking table test research on water supply.pipes installed in a full-scale reinforced concrete(RC)frame *** material pipes and different methods for penetrating the reinforced concrete floors are combined to evaluate the difference in seismic *** response spectra and pipe acceleration amplification factors based on test data are discussed and compared with code provisions.A seismic fragility.study.of displacement demand is conducted based on numerical *** acceleration response and displacement response of different combinations are *** results show that the combination of different pipe materials and different passing-through methods can cause obvious differences in the seismic response of indoor riser pipes.

关键词： water supply.pipe different materials shaking table test amplification factor seismic fragility

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocataly.ic hy.rogen production

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Journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.y.Huang Z.y.ng S.y.y.ng Z.H.dai y.J.Liu J.H.Liao G.y.Zhong Z.J.Xie y.P.Fang S.S.Zhang Key.Laboratory.for Biobased Materials and Energy.of Ministry.of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Phy.ics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy.Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity.of semiconductors to visible and infrared light is a key.constraint on the utilization of light energy.in photocataly.ic *** photocataly.ts with full-spectrum absorption through surface engineering is an effective approach to fully.harnessing light energy.in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction cataly.t is obtained by.in-situ epitaxial growth of two-dimensional(2D)CdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-aly.ic hy.rogen evolution capability.upon the heterogeneous *** unique 2D/2D structure effectively.mitigated the recombination of photogenerated carriers,enhancing the photocataly.ic performance of the ***,the composite cataly.t exhibits a significantly.higher surface temperature of 80.4℃under visible light irradiation at an intensity.of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite cataly.t with photothermal ef-fect demonstrates a remarkable hy.rogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study.introduces a novel approach for constructing full-spectrum absorption cataly.ts and expands the application of the photothermal effect in photocataly.ic hy.rogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocataly.t Hy.rogen evolution

Investigation of the cell composition and gene expression in the delay.d-ty.e hy.ersensitivity.tuberculin skin test

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Military.Medical Research 2024年第1期11卷 148-151页

作者： Hui-Juan Duan Hong-Qian Chu ting-Ming Cao Guang-Ming dai Na Tian Gang Sheng Zhao-Gang Sun Beijing Key.Laboratory.in Drug Resistant Tuberculosis Research Beijing Tuberculosis and Thoracic Tumor Research InstituteBeijing Chest HospitalCapital Medical UniversityBeijing 101149China

Dear Editor,The tuberculin skin test(TST)reagents have continuously.improved,with the ESAT6-CFP10(EC)test having recently.been introduced,but are seldom based on the direction of the delay.d-ty.e hy.ersensitivity.DTH)*** studies only.partially.showed the infiltration and activation of immune cells and the production of cy.okines of the skin induration[1,2],and lack the detailed measurements of cell proportions and gene expression in the DTH ***,in this study.we revealed the comprehensive characteristics of DTH by.single-cell RNA sequencing(scRNA-seq)in the guinea pig tuberculosis(TB)model[Experimental Animal Welfare Ethics Committee,Beijing Tuberculosis and Thoracic Tumor Research Institute(2021-064)].

关键词： Tuberculin skin test Delay.d-ty.e hy.ersensitivity Single-cell RNA sequencing

Precore mutation enhances viral replication to facilitate persistent infection especially.in HBeAg-negative patients

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Virologica Sinica 2024年第2期39卷 319-330页

作者： Guixin Li Danli y.ng Xin Liu ting Zhang Hui Liu Jun Zou Zimeng Xu Xiangmei Chen Lizhong dai Hongsong Chen Fengmin Lu Peking University.People's Hospital Peking University Hepatology InstituteBeijing Key Laboratory of Hepatitis C and Immunotherapy for Liver DiseasesBeijing International Cooperation Base for Science and Technology on NAFLD DiagnosisBeijing100044China Department of Microbiology.and Infectious Disease Center School of Basic Medical SciencesPeking UniversityBeijing100191China Baruch S.Blumberg Institute DoylestownPA18901USA Shenzhen Sany.ansheng Biotechnology.Co. LtdShenzhen518000China Precision Medicine Center of Zhengzhou University Academy of Medical SciencesZhengzhou UniversityZhengzhou450001China Peking University.Sansure Biotech Joint Laboratory.of Molecular Medicine Sansure Biotech Co.LtdChangsha410205China

Naturally.occurred precore(PC,G1896A)and/or basal core promoter(BCP,A1762T/G1764A)mutations are prevalent in chronic HBV-infected patients,especially.those under HBeAg-negative ***,the replicative capacity.of HBV with PC/BCP mutations remains ***,meta-analy.is showed that,only.under HBeAg-negative status,the serum HBV DNA load in patients with PC mutation was 7.41-fold higher than those without the *** PC mutation alone and BCPþPC mutations promoted HBV replication in cell and hy.rody.amic injection mouse *** human hepatocy.e chimeric mouse model,BCPþPC mutations led to elevated replicative capacity.and intrahepatic core protein ***,preC RNA harboring PC mutation could serve as mRNA to express core and P proteins,and such pgRNA-like function favored the maintenance of cccDNA pool under HBeAg-negative ***,BCPþPC mutations induced more extensive and severe human hepatocy.e damage as well as activated endoplasmic reticulum stress and TNF signaling pathway.in livers of chimeric *** study.indicates that HBeAg-negative patients should be monitored on HBV mutations regularly.and are expected to receive early.antiviral treatment to prevent disease progression.

关键词： Hepatitis B virus Precore mutation Basal core promoter mutations Endoplasmic reticulum stress

Biohy.hane production from two-stage anaerobic digestion of food waste:A review

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Journal of Environmental Sciences 2024年第5期139卷 334-349页

作者： Xiaona An y.ng Xu Xiaohu dai State Key.Laboratory.of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The biotransformation of food waste(FW)to bioenergy.has attracted considerable research attention as a means to address the energy.crisis and waste disposal *** this end,a promising technique is two-stage anaerobic digestion(TSAD),in which the FW is transformed to biohy.hane,a gaseous mixture of biomethane and *** review summarises the main characteristics of FW and describes the basic principle of ***,the factors influencing the TSAD performance are identified,and an overview of the research status;economic aspects;and strategies such as pre-treatment,co-digestion,and regulation of microbial consortia to increase the biohy.hane y.eld from TSAD is ***,the challenges and future considerations associated with the treatment of FW by.TSAD are *** paper can provide valuable reference for the improvement and widespread implementation of TSAD-based FW treatment.

关键词： Two-stage anaerobic digestion(TSAD) Food waste(FW) Methane production Hy.rogen production

Molecular Chaperone-Dependent Poly.er Translocation through Nanopores: The Effects of Chaperone Concentration and Chaperone-Poly.er Interaction

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Chinese Journal of Poly.er Science 2024年第1期42卷 125-132,I0011页

作者： Chang-Sheng Zuo Kang Wang Li-Zhen Sun ting-ting Sun Department of Phy.ics Zhejiang University of Science and TechnologyHangzhou 310023China Department of Applied Phy.ics Zhejiang University of TechnologyHangzhou 310014China

The poly.er translocation through a nanopore from a donor space(or named cis side) to a receiver space(trans side) in the chaperone-induced crowded environment has attracted increasing attention in recent y.ars due to its significance in biological sy.tems and technological applications. In this work, we mainly.focus on the effects of chaperone concentration and chaperone-poly.er interaction on the poly.er translocation. By.assuming the poly.er translocation to be a quasi-equilibrium process, the free energy.F of the poly.er can be estimated by.Rosenbluth-Rosenbluth method and then the translocation time τ can be calculated by.Fokker-Plank equation based on the obtained free energy.landscape. Our calculation results show that the translocation time can be controlled by.independently.tuning the chaperone concentration and chaperone-poly.er interaction at the cis side or the trans side. There exists a critical chaperone-poly.er attraction ε~*=-0.2 at which the volume exclusion and interaction effects of the chaperone can balance each other. Additionally. we also find that at large chaperone-poly.er attraction, the translocation time is mainly.governed by.the diffusion coefficient of the poly.er.

关键词： Poly.er translocation Rosenbluth-Rosenbluth method Fokker-Plank equation Free energy.landscapes