检索结果-南通市图书馆

Dual fermion condensate and phase transition in QED_3

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2013年第6期56卷 1116-1119页

作者： feng hongtao YIN PeiLin SUN WeiMin ZONG HongShi Department of Physics Southeast University Department of Physics Nanjing University Joint Center for Particle Nuclear Physics and Cosmology

In this paper,we investigate the behaviors of dual fermion condensate in QED 3 under variation of *** means of Dyson-Schwinger equation for the fermion propagator,we extract the dual fermion condensate and compare its behavior with the ordinary chiral fermion condensate and the chiral *** is found that the dual fermion condensate cannot be regarded as the order parameter for the confinement-deconfinement phase transition in QED ***,the change of the dual fermion condensate around the chiral phase transition point observed in the present work must therefore be interpreted as solely induced by the chiral transition.

关键词： QED 3 dual fermion condensate deconfinement phase transition chiral phase transition

Finite volume effects on the QCD chiral phase transition in the finite size de-pendent Nambu-Jona-Lasinio model

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2019年第3期43卷 43-48页

作者： Yonghui Xia Qingwu Wang hongtao feng Hongshi Zong Department of physics Nanjing UniversityNanjing 210093China Department of physics Sichuan UniversityChengdu 610064China School of physics Southeast UniversityNanjing 210093China Joint Center for Particle Nuclear Physics and CosmologyNanjing 210093China

The effective Lagrangian of a finite volume system should, in principle, depend on the system size. In the framework of the Nambu-Jona-Lasinio(NJL) model, by considering the influence of quark feedback on the effective coupling, we obtain a modified NJL model so that its Lagrangian depends on the volume. Based on the modified NJL model, we study the influence of finite volume on the chiral phase transition at finite temperature, and find that the pseudo-critical temperature of crossover is much lower than that obtained in the normal NJL model. This clearly shows that the volume dependent effective Lagrangian plays an important role in the chiral phase transitions at finite temperature.

关键词： chiral phase transition NJL model finite volume effect

Spatial modulation of nanopattern dimensions by combining interference lithography and grayscale-patterned secondary exposure

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第5期11卷 832-841页

作者： Zhuofei Gan hongtao feng Liyang Chen Siyi Min Chuwei Liang Menghong Xu Zijie Jiang Zhao Sun Chuying Sun Dehu Cui Wen-Di Li Department of Mechanical Engineering University of Hong KongHong KongChina School of Microelectronics Southern University of Science and TechnologyShenzhenChina

Functional nanostructures are exploited for a variety of cutting-edge fields including plasmonics,metasurfaces,and biosensors,just to name a *** applications require nanostructures with uniform feature sizes while others rely on spatially varying ***,fine manipulation of the feature size over a large area remains a substantial challenge because mainstream approaches to precise nanopatterning are based on low-throughput pixel-by-pixel processing,such as those utilizing focused beams of photons,electrons,or *** this work,we provide a solution toward wafer-scale,arbitrary modulation of feature size distribution by introducing a lithographic portfolio combining interference lithography(IL)and grayscale-patterned secondary exposure(SE).Employed after the high-throughput IL,a SE with patterned intensity distribution spatially modulates the dimensions of photoresist *** on this approach,we successfully fabricated 4-inch wafer-scale nanogratings with uniform linewidths of<5%variation,using grayscale-patterned SE to compensate for the linewidth difference caused by the Gaussian distribution of the laser beams in the ***,we also demonstrated a wafer-scale structural color painting by spatially modulating the filling ratio to achieve gradient grayscale color using SE.

关键词： lithography dimensions spatially

Unravelling the anisotropic light-matter interaction in strainengineered trihalide MoCl_(3)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 2981-2987页

作者： Yuxuan Sun Ziang Liu Zeya Li feng Qin Junwei Huang Caiyu Qiu hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210000China

Layered trihalides exhibit distinctive band structures and physical properties due to the sixfold coordinated 3d or 4d transition metal site and partially occupied d orbitals,holding great potential in condensed matter physics and advanced electronic *** research focused on trihalides with highly symmetric honeycomb-like structures,such as CrI3 andα-RuCl_(3),while the role of crystal anisotropy in trihalides remains *** particular,the trihalide MoCl_(3) manifests strong in-plane crystal anisotropy with the largest difference in Mo–Mo interatomic *** on such material is imperative to address the lack of investigations on the effect of anisotropy on the properties of ***,we demonstrated the anisotropy of MoCl_(3) through polarized Raman spectroscopy and further tuned the phonon frequency via strain *** showed the Raman intensity exhibits twofold symmetry under parallel configuration and fourfold symmetry under perpendicular configuration with changing the polarization angle of incident ***,we found that the phonon frequencies of MoCl_(3) decrease gradually and linearly with applying uniaxial tensile strain along the axis of symmetry in the MoCl_(3) crystal,while those frequencies increase with uniaxial tensile strain applied *** results shed light on the manipulation of anisotropic light-matter interactions via strain engineering,and lay a foundation for further exploration of the anisotropy of trihalides and the modulation of their electronic,optical,and magnetic properties.

关键词： layered trihalide MoCl_(3) polarized Raman spectroscopy strain engineering anisotropy

不同烟草制品烟气气溶胶的粒径和成分对比研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国测试 2024年第7期50卷 85-90页

作者：杨继刘春波尹志豇唐石云司晓喜李振杰蒋薇承强冯洪涛李晖云南中烟工业有限责任公司技术中心云南昆明650000 四川大学化学工程学院四川成都610065

该文通过自行设计的在线捕集稀释装置采集烟气气溶胶,采用单颗粒气溶胶质谱仪(SPAMS)测定不同烟草制品主流烟气气溶胶中粒状物的粒径分布和含特定成分的粒状物数浓度随粒径的变化规律。结果表明三种烟草制品烟气气溶胶粒相物粒径的尺寸... 详细信息

该文通过自行设计的在线捕集稀释装置采集烟气气溶胶,采用单颗粒气溶胶质谱仪(SPAMS)测定不同烟草制品主流烟气气溶胶中粒状物的粒径分布和含特定成分的粒状物数浓度随粒径的变化规律。结果表明三种烟草制品烟气气溶胶粒相物粒径的尺寸在0.15μm到0.6μm之间服从正态分布规律,且在0.3~0.45μm范围内分布最为集中。三种烟草制品中含有芳香烃、有机碳和烟碱成分的粒状物占有较高比例,且不同类型的化合物在不同粒径气溶胶中呈现的分布趋势大致相同。含有特征化合物烟碱的粒状物呈现出传统卷烟<电子烟<加热不燃烧卷烟的总体趋势。致癌或促癌的化合物,包括芳香烃和重金属在传统卷烟、电子烟和加热不燃烧卷烟烟气气溶胶中的相对含量呈现逐渐增加的趋势。该文成果有助于研究烟草制品的烟气产生方式和产生条件对烟气气溶胶粒状物粒径和成分的分布规律影响。

关键词：单颗粒气溶胶质谱仪实时在线监测烟气气溶胶

维普期刊数据库博看期刊

A Blockchain-Based Efficient Cross-Domain Authentication Scheme for Internet of Vehicles

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第7期80卷 567-585页

作者： feng Zhao hongtao Ding Chunhai Li Zhaoyu Su Guoling Liang Changsong Yang Guangxi Engineering Research Center of Industrial Internet Security and Blockchain Guilin University of Electronic TechnologyGuilin541004China School of Information and Communication Guilin University of Electronic TechnologyGuilin541004China School of Computer Science and Information Security Guilin University of Electronic TechnologyGuilin541004China

The Internet of Vehicles(IoV)is extensively deployed in outdoor and open environments to effectively address traffic efficiency and safety issues by connecting vehicles to the ***,due to the open and variable nature of its network topology,vehicles frequently engage in cross-domain *** such processes,directly uploading sensitive information to roadside units for interaction may expose it to malicious tampering or interception by attackers,thus compromising the security of the cross-domain authentication ***,IoV imposes high real-time requirements,and existing cross-domain authentication schemes for IoV often encounter efficiency *** mitigate these challenges,we propose CAIoV,a blockchain-based efficient cross-domain authentication scheme for *** scheme comprehensively integrates technologies such as zero-knowledge proofs,smart contracts,and Merkle hash tree *** divides the cross-domain process into anonymous cross-domain authentication and safe cross-domain authentication phases to ensure efficiency while maintaining a balance between efficiency and ***,we evaluate the performance of *** results demonstrate that our proposed scheme reduces computational overhead by approximately 20%,communication overhead by around 10%,and storage overhead by nearly 30%.

关键词： Blockchain cross-domain authentication internet of vehicle zero-knowledge proof

Neural Network Robust Control Based on Computed Torque for Lower Limb Exoskeleton

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2024年第2期37卷 83-99页

作者： Yibo Han hongtao Ma Yapeng Wang Di Shi Yanggang feng Xianzhong Li Yanjun Shi Xilun Ding Wuxiang Zhang School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Beihang Goer(WeiFang)Intelligent Robot Co. Ltd.Beihang UniversityWeifangChina Research Center of Satellite Technology Harbin Institute of TechnologyHarbinChina Beijing Xinfeng Aerospace Equipment Co. LtdBeijingChina

The lower limb exoskeletons are used to assist wearers in various scenarios such as medical and industrial *** modeling errors of the exoskeleton in different application scenarios pose challenges to the robustness and stability of its control *** Radial Basis Function(RBF)neural network is used widely to compensate for modeling *** order to solve the problem that the current RBF neural network controllers cannot guarantee the asymptotic stability,a neural network robust control algorithm based on computed torque method is proposed in this paper,focusing on trajectory *** innovatively incorporates the robust adaptive term while introducing the RBF neural network term,improving the compensation ability for modeling *** stability of the algorithm is proved by Lyapunov method,and the effectiveness of the robust adaptive term is verified by the *** wearing the exoskeleton under different walking speeds and scenarios were carried out,and the results show that the absolute value of tracking errors of the hip and knee joints of the exoskeleton are consistently less than 1.5°and 2.5°,*** proposed control algorithm effectively compensates for modeling errors and exhibits high robustness.

关键词： Lower limb exoskeleton Model compensation RBF neural network Computed torque method

Synergistic chemotherapy/PTT/oxygen enrichment by multifunctional liposomal polydopamine nanoparticles for rheumatoid arthritis treatment

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2024年第1期19卷 86-102页

作者： Xiaoling Fu Yutong Song Xianquan feng Zhihong Liu Wenhao Gao hongtao Song Qian Zhang School of Pharmacy Fujian Medical UniversityFuzhou 350108China Fuzong Clinical Medical College of Fujian Medical University Fuzhou 350025China First school of clinical medicine Nanjing Medical UniversityNanjing 211166China

Amultifunctional liposomal polydopamine nanoparticle(MPM@Lipo)was designed in this study,to combine chemotherapy,photothermal therapy(PTT)and oxygen enrichment to clear hyperproliferating inflammatory cells and improve the hypoxic microenvironment for rheumatoid arthritis(RA)***@Lipo significantly scavenged intracellular reactive oxygen species and relieved joint hypoxia,thus contributing to the repolarization of M1 macrophages into M2 ***,MPM@Lipo could accumulate at inflammatory joints,inhibit the production of inflammatory factors,and protect cartilage in vivo,effectively alleviating RA progression in a rat adjuvant-induced arthritis ***,upon laser irradiation,MPM@Lipo can elevate the temperature to not only significantly obliterate excessively proliferating inflammatory cells but also accelerate the production of methotrexate and oxygen,resulting in excellent RA treatment ***,the use of synergistic chemotherapy/PTT/oxygen enrichment therapy to treat RA is a powerful potential strategy.

关键词： Polydopamine Thermosensitive liposomes Photothermal therapy Oxygen generation Rheumatoid arthritis

Discussion for the Solutions of Dyson-Schwinger Equations at <i>m</i>≠ 0 in QED<sub>3</sub>

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Physics 2013年第4期4卷 151-156页

作者： Huixia Zhu hongtao feng Weimin Sun Hongshi Zong Department of Physics Nanjing University Nanjing China Department of Physics Southeast University Nanjing China

In the case of nonzero fermion mass, within a range of Ansatze for the full fermion-boson vertex, we show that Dyson-Schwinger equation for the fermion propagator in QED3 has two qualitatively distinct dynamical chiral symmetry breaking solutions. As the fermion mass increases and reaches to a critical value mc, one solution disappears, and the dependence of mc on the number of fermion flavors is also given.

关键词： QED3 Fermion Propagator Solutions of DSEs