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number of states with given spin I and isospin T for n fermions in a j orbit

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Chinese Physics C 2022年第11期46卷 195-202页

作者： X.y.n y.M.Zhao Shanghai Key Laboratory of Particle Physics and Cosmology School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China

In this study,we investigate formulas of the number of states with a given total spin I and isospin T for n nucleons in a single-j shell denoted by DIT(j,n).Talmi's recursion formulas for the number of states with a given z-axis projection of total spin are generalized by further considering the isospin couplings and are applied to derive explicit formulas of DIT(j,n).

关键词： nuclear structure shell model nuclear spin and isospin

Microstructure and brazing mechanism of porous Si_3n_4/Invar joint brazed with Ag-Cu-Ti/Cu/Ag-Cu multi-layered filler

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Journal of Materials Science & Technology 2018年第4期34卷 713-719页

作者： J.Zhang J.y.Liu T.P.Wang School of Materials Science and Engineering Harbin Institute of Technology

Porous Si3n4 was brazed to Invar alloy in this study, and Ag-Cu-Ti/Cu/Ag-Cu multi-layered filler was designed to inhibit the formation of Fe2Ti and ni3Ti intermetallic compounds. The effects of the brazing temperature and the thickness of Cu interlayer on the microstructure and mechanical properties of brazed joints were investigated. The typical microstructure of the joint brazed with multi-layered filler was porous Si3n4/Tin ＋ Ti5Si3/Ag-Cu eutectic[Cu[Ag-Cu eutectic/Cu-rich layer ＋ diffusion layer/Invar. When the brazing temperature increased, the reaction layer at the ceramic/filler interface grew thicker and the Cu interlayer turned thinner. As the thickness of Cu interlayer increased from 50 to 150 μm, the joint strength first increased and then decreased. In this research, the maximum shear strength （73 MPa） was obtained when being brazed at 1173 K with a 100 μm Cu interlayer applied in the filler, which was 55% higher than that brazed with single Ag-Cu-Ti brazing alloy and had reached 86% of the ceramic. The release of residual stress and the barrier effect of Cu interlayer to inhibit the formation of Fe2Ti and ni3Ti intermetallics played the major role in the improvement of joint strength.

关键词： Porous Si3n4 Invar alloy Brazing Microstructure Mechanical properties

Surface hydrophobicity: effect of alkyl chain length and network homogeneity

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Frontiers of Chemical Science and Engineering 2021年第1期15卷 90-98页

作者： Wenqian Chen Vikram Karde Thomas n.H.Cheng Siti S.Ramli Jerry y.y.Heng Department of Chemical Engineering Imperial College LondonLondonSW72AZUK Department of Food Technology Faculty of Applied SciencesUniversiti Teknologi MARA(UiTM)Shah AlamSelangorMalaysia

Understanding the nature of hydrophobicity has fundamental importance in environmental *** spherical silica nanoparticles(diameter=369±7 nm)as the model material,the current study investigates the relationship between the alkyl chain network and *** alkyl silanes with different chain length(triethoxymethylsilane(C1)***(octyl)silane(C8))were utilised separately for the functionalisation of the *** contact angle and inverse gas chromatography results show that the alkyl chain length is essential for controlling hydrophobicity,as the octyl-functionalised nanoparticles were highly hydrophobic(water contact angle=150.6°±6.6°),whereas the methyl-functionalised nanoparticles were hydrophilic(i.e.,water contact angle=0°,similar to the pristine nanoparticles).The homogeneity of the octyl-chain network also has a significant effect on hydrophobicity,as the water contact angle was reduced significantly from 148.4°±3.5°to 30.5°±1.0°with a methyl-/octyl-silane mixture(ratio=160:40µL·g^(–1) nanoparticles).

关键词： hydrophobicity surface energy wettability alkyl chain network silica nanoparticle

Diagnostic approach to patients with cholestatic jaundice

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World Journal of Gastroenterology 1999年第3期5卷 252-262页

作者： Assy.n Jacob G Spira G Edoute y Liver Disease Unit and Department of Internal Medicine C Rambam Medical Center Haifa and Department of Anatomy the Bruce Rappaport Faculty of Medicine Technion-Israel Institute of Technology Haifa Israel

Conjugated hyperbilirubinemia due to any form of hepatobiliary disease is essentially the result of impairment in bile formation and/or bile flow, a condition known as cholestasis[1,2].

关键词： AIDS cell US ERCP GGT Diagnostic approach to patients with cholestatic jaundice PBC TPn

Hybrid TiO_(2)/Ag nPs/g-C_(3)n_(4) nanocomposite coatings on TC4 titanium alloy for enhanced synergistic antibacterial effect under full spectrum light

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Journal of Materials Science & Technology 2022年第23期118卷 35-43页

作者： Xi.Rao L.Du J.J.Zhao X.D.Tan y.X.Fang L.Q.Xu y.P.Zhang School of Materials and Energy Southwest UniversityChongqing 400715China Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing Southwest UniversityChongqing 400715China

The hybrid TiO_(2)/AgnPs/g-C_(3) n_(4) nanocomposite coatings were constructed on TC4 alloy by a hydrothermal and calcining ***_(2)/AgnPs/g-C_(3) n_(4) nanocomposite coatings demonstrated excellent biocompatibility and osteogenesis compared to those of titanium *** existence of trace AgnPs on the surface and interface of the heterojunction could further enhance the transfer and separation of photogenerated electron/hole pairs,which greatly improved the antibacterial performance under full spectrum *** at the valence band of TiO_(2) and g-C_(3) n_(4) reacted with adsorbed H_(2) O to generate·OH,killing bacteria through photocatalytic redox reaction under light irradiation,while released AgnPs exhibited bacteriostatic efficacy with or without *** study provides a pathway of coating modification for further improving the antibacterial properties of heterojunction coatings and maintaining the biocompatibility of matrix materials.

关键词： TiO_(2)/AgnPs/g-C_(3)n_(4)nanocomposite g-C_(3)n_(4) Photocatalysis Photocatalytic inactivation of bacteria Disinfection mechanism

Viscous dissipation of Rankine vortex profile in zero meridional flow

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Acta Mechanica Sinica 2005年第6期21卷 550-556页

作者： y.Ahoelkassem G.H.Vatistas n.Esmail Department of Mechanical and Industrial Engineering Concordia UniversityMontreal.Quebec H3G 1M8Canada

An analytical solution is given for a time-decay Rankine vortex profile due to viscous effects. The vortex filament is assumed to be isolated, strong, concentrated and having zero-meridional flow （i.e. radial and axial velocities are equal to zero）. Zero-meridional renders the governing equations for an unsteady, incompressible and axisymmetric vortex in a simple form. Based on the tangential momentum equation, the spatial-temporal distributions of the swirl velocity are given in terms of Fourier-Bessel series by using separation of variables technique. A general formula is derived by total differentiation of the swirl velocity with respect to time, depicting the viscous dissipation for Oseen and Taylor-like vortex profiles. This analysis is validated by comparison with previous experimental data.

关键词： Rankine vortex Dissipation Fourier series Monopolar Zero-Meridional

From single to combinatorial therapies in spinal cord injuries for structural and functional restoration

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neural Regeneration Research 2025年第3期20卷 660-670页

作者： Ernesto Doncel-Pérez Gabriel Guízar-Sahagún Israel Grijalva-Otero Hospital nacional de Parapléjicos de Toledo Servicio de Salud de Castilla La Mancha(SESCAM)ToledoSpain Medical Research Unit for neurological Diseases UMAE Hospital de EspecialidadesCentro Médico Nacional Siglo XXIIMSSCiudad de MéxicoMéxico

Spinal cord injury results in paralysis, sensory disturbances, sphincter dysfunction, and multiple systemic secondary conditions, most arising from autonomic dysregulation. All this produces profound negative psychosocial implications for affected people, their families, and their communities;the financial costs can be challenging for their families and health institutions. Treatments aimed at restoring the spinal cord after spinal cord injury, which have been tested in animal models or clinical trials, generally seek to counteract one or more of the secondary mechanisms of injury to limit the extent of the initial damage. Most published works on structural/functional restoration in acute and chronic spinal cord injury stages use a single type of treatment: a drug or trophic factor, transplant of a cell type, and implantation of a biomaterial. Despite the significant benefits reported in animal models, when translating these successful therapeutic strategies to humans, the result in clinical trials has been considered of little relevance because the improvement, when present, is usually insufficient. Until now, most studies designed to promote neuroprotection or regeneration at different stages after spinal cord injury have used single treatments. Considering the occurrence of various secondary mechanisms of injury in the acute and sub-acute phases of spinal cord injury, it is reasonable to speculate that more than one therapeutic agent could be required to promote structural and functional restoration of the damaged spinal cord. Treatments that combine several therapeutic agents, targeting different mechanisms of injury, which, when used as a single therapy, have shown some benefits, allow us to assume that they will have synergistic beneficial effects. Thus, this narrative review article aims to summarize current trends in the use of strategies that combine therapeutic agents administered simultaneously or sequentially, seeking structural and functional restoratio

关键词： neural regeneration neuroprotection spinal cord injury repair spinal cord injury treatments structural restoration of spinal cord injury

Effect of nitrogen Content on Microstructures and Mechanical Properties of WB_2(n) Films Deposited by Reactive Magnetron Sputtering

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Journal of Materials Science & Technology 2015年第12期31卷 1217-1225页

作者： y.M.Liu D.y.Deng H.Lei Z.L.Pei C.L.Jiang C.Sun J.Gong Institute of Metal Research Chinese Academy of Sciences

In the present study,WB 2（n） films are fabricated on silicon and yG8 substrates at different n 2 pressures by reactive magnetron *** influence of n 2 partial pressure（P （n2）） on the film microstructure and characteristics is studied systematically,including the chemical composition,crystalline structure,residual stress,surface roughness as well as the surface and the cross-section ***,nano-indentation and ball-on-disk tribometer are performed to analyze the mechanical and tribological properties of the *** results show that the addition of nitrogen apparently leads to the change of the structure from（1 0 1） to（0 0 1） orientation then to the amorphous structure with the formation of Bn *** the addition of nitrogen can greatly refine the grain size and microstructure of the ***,the residual stress of the film is also found to change from tensile to compressive stress as a function of P （n2）,and the compressive stress increases with P （n2）,The WB 2（n） films with small nitrogen content,which are deposited at P （n2） of 0.004 and 0.006 Pa,exhibit better mechanical,tribological and corrosion properties than those of other *** increase of nitrogen content accelerates the formation of Bn phase and fast decreases the film *** addition,the large n 2 partial pressure gives rise to the target poisoning accompanied by the increase of the target voltage and the decrease of the deposition rate.

关键词： Reactive magnetron sputtering nanocomposites WB 2(n) films Residual stress Mechanical properties

Photovoltaic enhancement of Si solar cells by assembled carbon nanotubes

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nano-Micro Letters 2010年第1期2卷 22-25页

作者： y.F.Zhang y.F.Wang n.Chen y.y.Wang y.Z.Zhang Z.H.Zhou L.M.Wei Key laboratory for Thin Film and Microfabrication of the Ministry of Education National Key Laboratory of Nano/Micro Fabrication Technology Research Institute of Micro/Nano Science and Technology Shanghai Jiao Tong University

Photovoltaic conversion was enhanced by directly assemble of a network of single-walled carbon nanotubes(SWnTs) onto the surface of n-p junction silicon solar cells. When the density of SWnTs increased from 50 to 400 tubes μm^(-2), an enhancement of 3.92% in energy conversion efficiency was typically obtained. The effect of the SWnTs network is proposed for trapping incident photons and assisting electronic transportation at the interface of silicon solar cells.

关键词： Solar cell Carbon nanotube Photovoltaic enhancement Heterojunction