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Anomalous open orbits in Hofstadter spectrum of Chern insulator

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Science China(Physics,Mechanics & Astronomy) 2025年第3期Mechanics & Astronomy) .卷 143-148页

作者： Haijiao ji Peng Zhou Noah f.Q.Yuan Hua jiang Haiwen Liu X.C.Xie Center for Advanced Quantum Studies Department of Physics Beijing Normal University Tsung-Dao Lee Institute Shanghai Jiao Tong University Department of Mathematics UC Berkeley Institute for Nanoelectronic Devices and Quantum Computing Fudan University International Center for Quantum Materials School of Physics Peking University Hefei National Laboratory

The nontrivial band topology of Chern insulator can enrich the content of its Hofstadter butterfly spectra, which is closely related to recent experiments in twisted bilayer graphene and cold atom systems. We investigate the Hofstadter spectrum for various models of Chern insulators under a rational flux φ0/q, here φ0=h/e and q being an integer. We find the number of splitting subbands is |q-C| with C denoting the Chern number of parent band. Importantly, anomalous open-orbital subbands with Chern numbers q-1 and-q-1 emerge unexpectedly, which are beyond the parameter window（-q/2, q/2） of the Diophantine equation studied by Thouless-Kohmoto-Nightingale-den Nijs [Phys. Rev. Lett. 49, 405（1982）]. The emergence of anomalous open orbits can be traced by analyzing the evolution of the Hofstadter spectrum, identifying as a new type of topological phase transition. These novel findings not only pinpoint the peculiar Hofstadter spectrum of Chern insulator, but also provide routes to study exotic characteristics beyond the Landau level physics.

关键词： Hofstadter spectrum topological phase transition open orbit

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The influence mechanism of environmental factors on DGT adsorbing sulfonamides and the migration between water and sediment

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Journal of Environmental Sciences 2025年第5期151卷 347-359页

作者： Peng Zhang jingfeng Yan Hao ji Linke Ge Yanying Li School of Environmental Science and Technology Shaanxi University of Science&TechnologyXi’an 710021China College of Environmental Sciences and Engineering Dalian Maritime UniversityDalian 116026China

Obtaining the sulfonamides(SAs)concentrations in the water body and sediment bulk was a prerequisite to reveal their transport and partitioning behavior in sediment-water environments and accurately assess their ecological *** the present study,the influences of multifactor interactions on the performance of o-DGTs with XAD-18 binding gels were analyzed by central combination experiments and response surfaces analysis,in which the target compounds were 9 *** results indicated that dissolved organic matter(DOM),pH,and suspended particulate matter(SS)had significant effects on the o-DGT sampling,whereas this o-DGT was independent of the ionic strength(IS).Concentning the composite influence of the four factors,the interaction between DOM and SS posed the most significant effect on all 9 SAs ***,an o-DGT and DIfSmodel was applied to explore the SAs migration between the water-sediments *** difference between desorption rate(k_(b))and adsorption rates(k_(f))values suggested that the kinetics of SAs was dominated by ***,the short-term sediment-water partitioning of SAs was clarified on the basis of distribution coefficient(K_(dl))for the labile SAs,among which the sulfadiazine(SDZ)had the largest labile *** ability of sediments to release SAs to the liquid phase as a sink was determined by response time(T_(c)).Among the 9 SAs,the longterm release of soseulfamethoxypyridazine(SMP)from the solid phase of sediments would have a potential risk to the aquatic environment,to which more attention should be paid in the future.

关键词： Sulfonamides O-DGT Water-sediments interface DIfS Distribution

Internal transcribed spacer sequencing to explore the intrinsic composition of fungal communities in fungal esophagitis

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World Journal of Gastroenterology 2025年第7期31卷 26-38页

作者： Yi-Kang Song Lin Zheng Ai-Xin Liu Jun-ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesShijiazhuang050000Hebei ProvinceChina

BACKGROUND fungal esophagitis(fE)is caused by fungal invasion of the esophageal *** endoscopy,the esophageal mucosa shows edema,congestion,erosion,and ulceration,and bleeds easily when touched,and the surface of the mucosa is covered with small white spots like"bean curd residue".Clinical cases showing typical fE under endoscopic imaging but negative esophageal mucosal brush(referred to as suspected fE)have increased the difficulty and challenge of clinical diagnosis and *** present,the esophageal fungal flora of suspected case has not been thoroughly *** To characterize the fungal flora in fE,suspected fE,and the esophageal normal controls(NCs),and to identify marker species to improve detection of *** This was a case-control study.A total of 19 patients with fE,16 with suspected fE,and 10 NCs were selected by *** esophageal cell brush samples of each group were sequenced by internal transcribed spacer(ITS)1 and analyzed by *** In fE and suspected fE patients,species richness,species diversity and species evenness,as measured by the Chao1 index,Shannon index and Pielou index,were lower than in the NCs,and the comparison between the fE and NCs was the most significant(Pf Candida in fE and suspected fE patients was significantly increased(Pf Yarrowia was significantly decreased(PfE group was significantly lower than in the NCs and suspected fE groups(Pfor Candida in fE and suspected fE patients was 99.5%(PfE patients,the relative abundance of Ascomycota and Candida in the esophageal flora of suspected fE patients was decreased,while the relative abundance of Yarrowia,Thermomyces and Pichia was *** ITS showed that composition of the fungal community was similar in the f

关键词： fungal microbiota Esophagitis Candida Yarrowia Biomarker

Interannual succession of phytoplankton community in a canyon-shaped drinking water reservoir during the initial impoundment period:Taxonomic versus functional groups

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Journal of Environmental Sciences 2025年第5期151卷 454-468页

作者： Yi Hou Ya Cheng Kai Li Meng Yang Kangzhe Huang Gang ji Ruikang Xue Tinglin Huang Gang Wen Shaanxi Provincial field Scientific Observation and Research Station of Water Quality in Qinling Mountains Xi’an University of Architecture and TechnologyXi’an 710055China Key Laboratory of Northwest Water Resource Environment and EcologyMOEXi’an University of Architecture and TechnologyXi’an 710055China School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

During the initial impoundment period of a canyon-shaped reservoir,the water body fluctuated violently regarding water level,hydrological condition,and thermal *** variations may alter the structure of phytoplankton community,resulting in algal blooms and seriously threatening the ecological security of the *** is of great significance to understand the continuous changes of phytoplankton in the initial impoundment period for the protection of reservoir water ***,a two-year in-situ monitoring study was conducted on water quality and phytoplankton in a representative canyonshaped reservoir named Sanhekou and the interannual changes of phytoplankton community and its response to environmental changes during the initial impoundment period were discussed at taxonomic versus functional classification *** results showed that the total nitrogen and permanganate index levels were relatively high in the first year due to rapid water storage and heavy rainfall input,and the more stable hydrological conditions in the second year promoted the increase of algae density and the transformation of community,and the proportion of cyanobacteria increased *** succession order of phytoplankton in the first year of the initial impoundment periodwas Chlorophyta-Bacillariophyta-Chlorophyta,or J/f/X1-P/MP/W1-A/X1/MP,*** the succession order in the second year was Cyanobacteria/Chlorophyta-Bacillariophyta-Chlorophyta,or L_(M)/G/P-P/A/X1-X1/J/*** temperature,relativewater column stability,mixing depth,and pHwere crucial factors affecting phytoplankton community *** study revealed the interannual succession law and driving factors of phytoplankton in the initial impoundment period and provided an important reference for the operation management and ecological protection of canyon-shaped reservoirs.

关键词： Canyon-shaped reservoir functional groups Initial impoundment Interannual succession Water quality

Bacillus CotA laccase improved the intestinal health,amino acid metabolism and hepatic metabolic capacity of Pekin ducks fed naturally contaminated AfB_(1)diet

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Journal of Animal Science and Biotechnology 2025年第1期16卷 331-344页

作者： Mingxin Ma Qianqian Wang Yanrong Liu Guiming Li Limeng Liu Gaigai Wang Yongpeng Guo Shimeng Huang Qiugang Ma Cheng ji Lihong Zhao State Key Laboratory of Animal Nutrition and feeding Poultry Nutrition and Feed Technology Innovation TeamCollege of Animal Science and TechnologyChina Agricultural UniversityNo.2.Yuanmingyuan West RoadBeijing 100193People’s Republic of China Poultry Institute Shandong Academy of Agricultural SciencesJinan 250100China College of Animal Science and Technology Henan Agricultural UniversityZhengzhou 450046China

Background AflatoxinB1(AfB_(1))is a prevalent contaminant in agricultural products,presenting significant risks to animal *** laccase from Bacillus licheniformis has shown significant efficacy in degrading mycotoxins in vitro *** efficacy of Bacillus CotA laccase in animals,however,remains to be confirmed.A 2×2 factorial design was used to investigate the effects of Bacillus CotA laccase level(0 or 1 U/kg),AfB_(1) challenge(challenged or unchal-lenged)and their interactions on *** purpose of this study was to evaluate the efficacy of Bacillus CotA laccase in alleviatingAfB_(1) toxicosis of *** Bacillus CotA laccase alleviatedAfB_(1)-induced declines in growth performance of ducks accompanied by improved average daily gain(ADG)and lower feed/gain ratio(f/G).Bacillus CotA laccase amelioratedAfB_(1)-induced gut barrier dysfunctions and inflammation testified by increasing the jejunal villi height/crypt depth ratio(VH/CD)and the mRNA expression of tight junction protein 1(TJP1)and zonula occluden-1(ZO-1)as well as decreasing the expression of inflammation-related genes in the jejunum of *** acid metabolome showed that Bacillus CotA laccase amelioratedAfB_(1)-induced amino acid metabolism disorders evidenced by increasing the level of glu-tamic acid in serum and upregulating the expression of amino acid transport related genes in jejunum of ***-lus CotA laccase amelioratedAfB_(1)-induced liver injury testified by suppressing oxidative stress,inhibiting apoptosis,and downregulating the expression of hepatic metabolic enzyme related genes of ***,Bacillus CotA laccase degradedAfB_(1) in digestive tract of ducks,resulting in the reduced absorption level ofAfB_(1) across intestinal epithelium testified by the decreased level ofAfB_(1)-DNA adduct in the liver,and the reduced content ofAfB_(1) residues in liver and feces of *** Bacillus CotA laccase effectively improved the growth performance,inte

关键词： AfB_(1)residue Aflatoxin Bacillus CotA laccase Duck Intestinal barrier function Liver metabolic enzyme

Two-plasmon-decay instability stimulated by dual laser beams in inertial confinement fusion

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Matter and Radiation at Extremes 2025年第1期10卷 48-56页

作者： C.-W.Lian Y.ji R.Yan J.Li L.-f.Wang Y.-K.Ding J.Zheng Department of Modern Mechanics University of Science and Technology of ChinaHefeiAnhui 230026China Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghai 200240China Department of Plasma Physics and fusion Engineering University of Science and Technology of ChinaHefei 230026China Institute of Applied Physics and Computational Mathematics Beijing 100088China

Two-plasmon-decay instability(TPD)poses a critical target preheating risk in direct-drive inertial confinement *** this paper,TPD collectively driven by dual laser beams consisting of a normal-incidence laser beam(Beam-N)and a large-angle-incidence laser beam(Beam-L)is investigated via particle-in-cell *** is found that significant TPD growth can develop in this regime at previously unexpected low laser intensities if the intensity of Beam-L exceeds the large-angle-incidence *** beams contribute to the growth of TPD in a“seed-amplification”manner in which the absolute instability driven by Beam-L provides the seeds that are convectively amplified by Beam-N,making TPD energetically important and causing significant pump depletion and hot-electron generation.

关键词： laser pump decay

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公共性建构:乡村文化治理先行的实现逻辑

中国农村观察 2025年第1期 3-20页

作者：季乃礼尹剑南开大学周恩来政府管理学院

文化治理主张治理内容与治理工具的统一。由行政思维或经济思维主导的乡村文化治理往往侧重于文化治理的内容或工具的单一维度,难以真正融入乡村文化生态。为实现乡村文化治理先行,以文化引领并整合乡村治理资源,需要从乡村文化自身的... 详细信息

文化治理主张治理内容与治理工具的统一。由行政思维或经济思维主导的乡村文化治理往往侧重于文化治理的内容或工具的单一维度,难以真正融入乡村文化生态。为实现乡村文化治理先行,以文化引领并整合乡村治理资源,需要从乡村文化自身的公共性出发,实现治理内容与治理工具有机结合。本文以浙江省余姚市和山东省齐河县的“文化先行官”项目为例,考察乡村文化治理过程中公共性建构的具体实践。研究显示:一方面,“文化先行官”项目通过建设具有公共性的乡村文化,重塑了乡村公共权威和公共空间,形成了乡村治理所需的公共精神和公共规则,这是乡村文化治理公共性建构的内在逻辑;另一方面,“文化先行官”项目以治理建设公共文化,又以文化发展乡村治理,体现了乡村文化治理内容与工具两个维度的结合。

关键词：文化治理公共性 “文化先行官” 乡村振兴

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Lip-Audio Modality fusion for Deep forgery Video Detection

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Computers, Materials & Continua 2025年第2期82卷 3499-3515页

作者： Yong Liu Zhiyu Wang Shouling ji Daofu Gong Lanxin Cheng Ruosi Cheng College of Cyberspace Security Information Engineering UniversityZhengzhou450001China Research Institute of Intelligent Networks Zhejiang LabHangzhou311121China College of Computer Science and Technology Zhejiang UniversityHangzhou310027China Henan Key Laboratory of Cyberspace Situation Awareness Zhengzhou450001China Key Laboratory of Cyberspace Security Ministry of EducationZhengzhou450001China

In response to the problem of traditional methods ignoring audio modality tampering, this study aims to explore an effective deep forgery video detection technique that improves detection precision and reliability by fusing lip images and audio signals. The main method used is lip-audio matching detection technology based on the Siamese neural network, combined with MfCC (Mel frequency Cepstrum Coefficient) feature extraction of band-pass filters, an improved dual-branch Siamese network structure, and a two-stream network structure design. firstly, the video stream is preprocessed to extract lip images, and the audio stream is preprocessed to extract MfCC features. Then, these features are processed separately through the two branches of the Siamese network. finally, the model is trained and optimized through fully connected layers and loss functions. The experimental results show that the testing accuracy of the model in this study on the LRW (Lip Reading in the Wild) dataset reaches 92.3%;the recall rate is 94.3%;the f1 score is 93.3%, significantly better than the results of CNN (Convolutional Neural Networks) and LSTM (Long Short-Term Memory) models. In the validation of multi-resolution image streams, the highest accuracy of dual-resolution image streams reaches 94%. Band-pass filters can effectively improve the signal-to-noise ratio of deep forgery video detection when processing different types of audio signals. The real-time processing performance of the model is also excellent, and it achieves an average score of up to 5 in user research. These data demonstrate that the method proposed in this study can effectively fuse visual and audio information in deep forgery video detection, accurately identify inconsistencies between video and audio, and thus verify the effectiveness of lip-audio modality fusion technology in improving detection performance.

关键词： Deep forgery video detection lip-audio modality fusion mel frequency cepstrum coefficient siamese neural network band-pass filter

finite element simulation of elastoplastic fieldnear crack tips and results for a central crackedplate of le-lhp material under tension

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Acta Mechanica Sinica 2019年第4期35卷 828-838页

作者： X. ji f. Zhu School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai 200092 China

The elastoplastic field near crack tips is investigated through finite element simulation.A refined mesh model near the crack tip is proposed. In the mesh refining area, element size continuously varies from the nanometer scale to themicrometer scale and the millimeter scale. Graphics of the plastic zone, the crack tip blunting, and the deformed crack tip elements are given in the *** on the curves of stress and plastic strain, closely near the crack tip, the stresssingularity index and the stress intensity factor,as well as the plastic strain singularity index and the plastic strain intensity factor are *** and plastic strainsingular index vary with the load, while the dimensions of the stress and the plastic strain intensity factorsdependon the stress and the plastic strain singularity index, respectively. The singular field near the elastoplastic crack tip is characterized by the stress singularity index and the stress intensity factor, or alternativelythe plastic strain singularity index and the plastic strain *** the end of the paper, following Irwin’s concept of fracture mechanics,σδKσδKcriterion andεδQεδQcriterion are ***, crack tip angle criterion is also presented.

关键词： Crack fracture mechanics Elastoplasticity finite element method Geometry Nonlinearity