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Permutation orbifolds of vertex operator superalgebras and associative algebras

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Science China Mathematics 2025年第1期68卷 19-38页

作者： Chongying Dong feng xu Nina Yu Department of Mathematics University of California at Santa CruzSanta CruzCA 95064USA Department of Mathematics Huzhou UniversityHuzhou 313000 China Department of Mathematics University of California at RiversideRiversideCA 92521USA School of Mathematical Sciences Xiamen UniversityXiamen 361005China

Let V be a vertex operator superalgebra and g=(12···k)be a k-cycle which is viewed as an automorphism of the tensor product vertex operator superalgebra V^(■k).In this paper,we construct an explicit isomorphism from A_(g)(V^(■k))to A(V)if k is odd and to Aσ(V)if k is even whereσis the canonical automorphism of V of order 2 determined by the superspace structure of *** recover previous results by Barron(2016)and Barron and Vander Werf(2014)that there is a one-to-one correspondence between irreducible g-twisted V^(■k)-modules and irreducible V-modules(***σ-twisted V-modules)when k is odd(***).This explicit isomorphism is expected to be useful in our further study on the Zhu algebra of the fixed point subalgebra.

关键词： permutation orbifold vertex operator superalgebra Zhu algebra

Unraveling atomistic and electronic origins of multiaxial magnetic anisotropy

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 175-182页

作者： Boyu Liu xueyang Li Junsheng feng Changsong xu Hongjun Xiang Key Laboratory of Computational Physical Sciences(Ministry of Education) Institute of Computational Physical SciencesState Key Laboratory of Surface Physics and Department of PhysicsFudan UniversityShanghai200433China Shanghai Qi Zhi Institute Shanghai200030China School of Physics and Material Engineering Hefei Normal UniversityHefei230601China

Multiaxial magnetic anisotropy(MA)refers to the phenomenon that multiple axes of the magnetic crystal correspond to different energy *** with the common uniaxial magnetic anisotropy,multiaxial MA facilitates novel forms of applications in ***,by combining the first-principles-based spin Hamiltonian and tight-binding(TB)method,we reveal the microscopic origins,instead of the common phenomenological understanding,of biaxial MA and triaxial *** the example system of NiO,it is found that the multiple minima result from the fourth-order and the sixth-order single ion interactions,while the difference between[110]and[110]directions originates from a second-order bond-dependent anisotropic pair interaction(i.e.,the so-called Gamma interaction).Moreover,through the application of a newly developed general spin dependent TB approach,it is revealed that the triaxial MA arises from the special spin-orbital entangled Hund term,which is different from the orbital-independent Hund term in the usual Slater Koster TB *** work thus not only leads to a thorough understanding of the multiaxial MA in NiO,but also establishes a methodology that can be widely used to explore the microscopic origins of MA in different magnets.

关键词： multiaxial magnetic anisotropy origin of multiaxial magnetic mnisotropy effective spin Hamiltonian tight-binding model antiferromagnetism

Precision-Engineered Construction of Proton-Conducting Metal-Organic Frameworks

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Nano-Micro Letters 2025年第4期17卷 230-274页

作者： Liyu Zhu Hongbin Yang Ting xu feng Shen Chuanling Si State Key Laboratory of Biobased Fiber Manufacturing Technology Tianjin Key Laboratory of Pulp and PaperTianjin University of Science and Technology300457 TianjinPeople’s Republic of China State Key Laboratory of Pulp and Paper Engineering South China University of Technology510640 GuangzhouPeople’s Republic of China Agro-Environmenta Protection Institute Ministry of Agriculture and Rural Affairs300191 TianjinPeople’s Republic of China Robustnique Co.Ltd. Block CPhase IIPioneer ParkLanyuan Road300384 TianjinPeople’s Republic of China

Proton-conducting materials have attracted considerable interest because of their extensive application in energy storage and conversion *** them,metal-organic frameworks(MOFs)present tremendous development potential and possibilities for constructing novel advanced proton conductors due to their special advantages in crystallinity,designability,and *** particular,several special design strategies for the structure of MOFs have opened new doors for the advancement of MOF proton conductors,such as charged network construction,ligand functionalization,metal-center manipulation,defective engineering,guest molecule incorporation,and pore-space *** the implementation of these strategies,proton-conducting MOFs have developed significantly and profoundly within the last ***,in this review,we critically discuss and analyze the fundamental principles,design strategies,and implementation methods targeted at improving the proton conductivity of MOFs through representative ***,the structural features,the proton conduction mechanism and the behavior of MOFs are discussed thoroughly and *** endeavors are also proposed to address the challenges of proton-conducting MOFs in practical *** sincerely expect that this review will bring guidance and inspiration for the design of proton-conducting MOFs and further motivate the research enthusiasm for novel proton-conducting materials.

关键词： MOFs Proton conduction Porous materials Fuel cells

Research on the hazards of gas leakage and explosion in a full-scale residential building

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Defence Technology(防务技术) 2025年第1期43卷 168-181页

作者： Chengjun Yue Li Chen Zhan Li Bin feng Ruizhi xu Engineering Research Center of Safety and Protection of Explosion&Impact of Ministry of Education Southeast UniversityNanjing 211189China

The gas explosion in residential building has always been a highly concerned *** in homogeneous mixtures have been extensively ***,mixtures are often inhomogeneous in the practical scenarios due to the differences in the densities of methane and *** order to investigate the effects of gas explosions in inhomogeneous mixtures,experimental studies involving gas leakage and explosion are conducted in a full-scale residential building to reproduce the process of gas *** fitting the dimensionless buoyancy as a function of dimensionless height and dimensionless time,a distribution model of gas in large-scale spaces is established,and the mechanism of inhomogeneous distribution of methane is also be ***,the stratified reconstruction method(SRM)is introduced for efficiently setting up inhomogeneous concentration fields in *** simulation results highlight that for the internal overpressure,the distribution of methane has no effect on the first overpressure peak(ΔP1),while it significantly influences the subsequent overpressure peak(ΔP2),and the maximum difference between the overpressure of homogeneous and inhomogeneous distribution is174.3%.Moreover,the initial concentration distribution also has a certain impact on the external overpressure.

关键词： Methane distribution Inhomogeneous mixture Gradient layer Gas explosion Explosive simulation

Copper homeostasis and neurodegenerative diseases

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Neural Regeneration Research 2025年第11期20卷 3124-3143页

作者： Yuanyuan Wang Daidi Li Kaifei xu Guoqing Wang feng Zhang International Research Laboratory of Ethnomedicine of Ministry of Education Key Laboratory of Basic Pharmacology of Ministry of EducationLaboratory Animal Center and Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiGuizhou ProvinceChina

Copper,one of the most prolific transition metals in the body,is required for normal brain physiological activity and allows various functions to work normally through its range of *** homeostasis is meticulously maintained through a complex network of copper-dependent proteins,including copper transporters(CTR1 and CTR2),the two copper ion transporters the Cu-transporting ATPase 1(ATP7A)and Cu-transporting beta(ATP7B),and the three copper chaperones ATOX1,CCS,and *** in copper homeostasis can lead to either the deficiency or accumulation of copper in brain *** evidence suggests that abnormal copper metabolism or copper binding to various proteins,including ceruloplasmin and metallothionein,is involved in the pathogenesis of neurodegenerative ***,the exact mechanisms underlying these processes are not *** is a potent oxidant that increases reactive oxygen species production and promotes oxidative *** reactive oxygen species levels may further compromise mitochondrial integrity and cause mitochondrial *** oxygen species serve as key signaling molecules in copper-induced neuroinflammation,with elevated levels activating several critical inflammatory ***,copper can bind aberrantly to several neuronal proteins,including alphasynuclein,tau,superoxide dismutase 1,and huntingtin,thereby inducing neurotoxicity and ultimately cell *** study focuses on the latest literature evaluating the role of copper in neurodegenerative diseases,with a particular focus on copper-containing metalloenzymes and copper-binding proteins in the regulation of copper homeostasis and their involvement in neurodegenerative disease *** synthesizing the current findings on the functions of copper in oxidative stress,neuroinflammation,mitochondrial dysfunction,and protein misfolding,we aim to elucidate the mechanisms by which copper contributes to a wide range of heredit

关键词： Alzheimer's disease amyotrophic lateral sclerosis disease copper homeostasis copper toxicity Huntington's disease Menkes'disease multiple sclerosis neurodegenerative disease Parkinson's disease Wilson's disease

Glial cell line-derived neurotrophic factor improves impaired colonic motility in experimental colitis mice through connexin 43

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World Journal of Gastroenterology 2025年第8期31卷 82-95页

作者： Wei Yang Rui Liu feng xu Department of Gastroenterology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Medical School Xiangyang Vocational and Technical CollegeXiangyang 441021Hubei ProvinceChina

BACKGROUND Colonic motility dysfunction is a common symptom of ulcerative colitis(UC),significantly affecting patients’quality of *** suggests that glial cell line-derived neurotrophic factor(GDNF)plays a role in restoring colonic *** To investigate whether GDNF enhances aberrant colonic motility in mice with experimental colitis via connexin 43(Cx43).METHODS An experimental colitis model was induced in male C57BL/6 mice using dextran sodium sulfate(DSS).The measurement of colonic transit time was conducted,and colon tissues were evaluated through transmission electron microscopy and hematoxylin and eosin *** mice were treated with exogenous GDNF and Gap 19,a selective Cx43 *** Cx43 and GDNF levels were detected via immunofluorescence,immunohistochemistry,and real-time polymerase chain *** levels of inflammatory markers,including interleukin-1β,tumor necrosis factor-α,interleukin-6,and C-reactive protein,were quantified using enzyme-linked immunosorbent *** Experimental colitis was successfully induced using DSS,and the findings exhibited that the colonic transit time was significantly delayed in colitis mice relative to the UC group(P<0.01).GDNF treatment improved colonic transit time and alleviated intestinal inflammation in DSS-induced colitis mice(P<0.05).In the UC+Gap19+GDNF group,colitis symptoms,colonic transit time,and inflammatory marker levels remained comparable to those in the UC group,indicating that the therapeutic effects of GDNF in UC mice were blocked by Gap *** GDNF improves colonic motility in mice with experimental colitis through a partially Cx43-mediated *** holds promise as a therapeutic option for improving colonic motility in patients with colitis.

关键词： Glial cell line-derived neurotrophic factor Ulcerative colitis Colonic motility Connexin 43 Dextran sodium sulfate model

High Efficiency Mixed Amine Adsorbents for Directly Capturing Carbon Dioxide from Air

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Chemical Research in Chinese Universities 2025年第1期41卷 138-145页

作者： WU Yilu ZHENG Haolong XIA Zihan FU Chengmin xu feng YAN Jian School of Environment and Chemical Engineering Foshan UniversityFoshan528000P.R.China Guangzhou Zhixin High School Guangzhou510080P.R.China

The development of effective adsorbents with high amine efficiency and CO_(2)adsorption almost unaffected by humidity is extremely *** this study,we introduce an innovative solid amine adsorbent,TETA/DEA@FS,composed of triethylenetetramine(TETA)and diethanolamine(DEA)functionalized fumed silica(FS),which exhibits exceptional capability in selectively capturing trace CO_(2)from N_(2).TETA/DEA@FS shows an exceptionally high capacity of CO_(2)adsorption of 1.13 mmol/g at the temperature of 298 K and the pressure of 0.0004 bar(1 bar=100 kPa),and achieves an unprecedented CO_(2)/N_(2)IAST selectivity of 1.70×10^(12).TETA/DEA@FS exhibits high amine efficiency,with breakthrough experiments demonstrating that CO_(2)adsorption remains nearly unaffected by ***,TETA/DEA@FS demonstrates rapid CO_(2)adsorption kinetics and outstanding cyclic stability.

关键词： Direct air capture(DAC) CO_(2) N_(2) Triethylenetetramine Diethanolamine

Inferior vena cava invasion by double-J stent

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World Journal of Emergency Medicine 2025年第1期16卷 97-98页

作者： Huiming Zhong Shanxiang xu Mao Zhang Yiping feng Department of Emergency Medicine the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China Key Laboratory of the Diagnosis and Treatment of Severe Trauma and Burn of Zhejiang Province Hangzhou 310009China Zhejiang Province Clinical Research Center for Emergency and Critical Care Medicine Hangzhou 310009China Research Institute of Emergency Medicine Zhejiang UniversityHangzhou 310009China

The double-J stent (DJS), first reported by Zimskind et al^([1])in 1967, is a commonly used therapeutic tool in urology. DJS is primarily used to maintain urine flow from the kidney to the bladder and to restore the continuity of the urinary tract in various urological conditions.^([2]) The DJS placement is typically performed under cystoscopic or fluoroscopic *** complications include dysuria, urinary frequency,hematuria, bacteriuria, stent fragmentation, and stone formation.^([3]) Most of these complications can be managed with supportive medical care.

关键词： urinary invasion bladder

How do Notch Shape and Boundary Conditions Affect the Hydro-Mechanical Behavior of Fractured Geomaterials?Findings via the Darcy-Brinkman-Biot Approach

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Journal of Earth Science 2025年第1期36卷 351-356页

作者： Yi-Xiang Wang Xiao-Pei Guo Ling xu Shi-feng Lu Department of Civil Engineering School of Human Settlements and Civil EngineeringXi'an Jiaotong UniversityXi'an 710049China China Construction Eighth Engineering Division Co. Ltd.Southwest BranchChengdu 610041China

0 INTRODUCTION Natural geomaterials,including soils and rocks,are invariably exposed to intricate stress conditions,in addition to water pressure,in various engineering contexts such as foundation treatment,mining,and *** geomaterials frequently contain numerous fractures,which significantly influence hydrological dynamics as water permeates through them,leading to processes like expansion and bifurcation(Shu et al.,2023;Tran and Jha,2021;Lei et al.,2017;Wang et al.,2015).

关键词： bifurcation invar mining