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Integrative Zoology 2022年第6期17卷 1041-1052页

作者： Xiaoning chen Xiang HOU tuo FENG Ning HAN Jing WANG Gang CHANG Shaanxi Key Laboratory for Animal Conservation Shaanxi Institute of ZoologyXi’anChina College of Life Sciences Shaanxi Normal UniversityXi’anChina

The effect of combined levonorgestrel(P)and quinestrol(E)on the fertility of stripedﬁeld mouse(Apodemus agrarius)has not been *** performed a series of experiments in both the laboratory andﬁeld to assess the effect of P and/or E on the fertility of *** the laboratory,to test the time-dependent anti-fertility ef-fects of P and E,as well as their mixtures,90 male stripedﬁeld mice were randomly assigned to 6 treatment groups(n=60),and a control group(n=30).Mice in 3 treatment groups were administered 1 of the 3 compounds(1 mg�kg–1[body weight]EP-1,0.34 mg�kg–1 E,0.66 mg�kg–1 P)for 3 successive days(another half for 7 suc-cessive days)via oral gavage;mice were then sacriﬁced 15 and 45 days after initiating the gavage ***ﬁndings indicated that E and EP-1 treatment,but not P or control treatment,signiﬁcantly decreased the sperm count in the caudal epididymis,as well as the weight of the testes,epididymides,and seminal ***,fer-tile female mice mated with E-and EP-1-treated males produced smaller *** data indicate that E and EP-1 can induce infertility in male *** theﬁeld,the population density of *** was signiﬁcantly inﬂu-enced by EP-1,and the rodent density in the treatment group was lower than that in the control ***,our results indicate that EP-1 is an effective contraceptive in ***,a dominant rodent species in the farmland.

关键词： Apodemus agrarius fertility control levonorgestrel quinestrol

Remarks on the Lower Bounds for the Average Genus

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Acta Mathematicae Applicatae Sinica 2011年第3期27卷 517-526页

作者： yi-chao chen College of mathematics and econometrics Hunan University 410082 Changsha China

Let G be a graph of maximum degree at most four. By using the overlap matrix method which is introduced by B. Mohar, we show that the average genus of G is not less than 1/3 of its maximum genus, and the bound is best... 详细信息

关键词： average genus lower bound girth overlap matrix

Hierarchical Dispatch Method for Integrated Heat and Power Systems Based on a Feasible Region of Boundary Variables

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CSEE Journal of Power and Energy Systems 2020年第3期6卷 543-553页

作者： tuo Jiang Yong Min Weichun Ge Lei chen Qun chen Fei Xu Huanhuan Luo Guiping Zhou State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Grid Liaoning Electric Power Supply Co.Ltd. Shenyang 110000China Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China

Fully utilizing the flexibility provided by a district heating system(DHS)can promote wind power accommodation for an electric power system(EPS).However,for privacy or communication reasons,existing power and heat dispatch methods are not suitable for practical *** this paper,a general math formulation of the hierarchical dispatch method is proposed to coordinate EPS and DHS operators based on the feasible region of boundary variables(FRBV),and a method based on the simplicial approximation approach is proposed to obtain a conservative FRBV approximation of a DHS.A simulation based on a real 41-node DHS is constructed to determine the factors that may impact the boundaries of the FRBV,and then the performance of the simplicial approximation approach is displayed by visualizing the approximation process for the FRBV,and finally three dispatch methods are compared to show the advantages of the proposed hierarchical dispatch method.

关键词： District heating system feasible region hierarchical dispatch method integrated heat and power system simplicial approximation approach

Progress in membrane distillation crystallization： Process models, crystallization control and innovative applications

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Frontiers of Chemical Science and Engineering 2017年第4期11卷 647-662,F0004页

作者： Jiang, Xiaobin tuo, Linghan Lu, Dapeng He, Gaohong Hou, Baohong chen, Wei Dalian Univ Technol Sch Chem Engn State Key Lab Fine Chem Res & Dev Ctr Membrane Sci & Technol Dalian 116024 Peoples R China Tianjin Univ Sch Chem Engn & Technol State Key Lab Chem Engn Natl Engn Res Ctr Ind Crystallizat Technol Tianjin 300072 Peoples R China

Membrane distillation crystallization （MDC） is a promising hybrid separation process that has been applied to seawater desalination, brine treatment and wastewater recovery. In recent years, great progress has been made in MDC technologies including the promotion of nucleation and better control of crystallization and crystal size distribution. These advances are useful for the accurate control of the degree of supersaturation and for the control of the nucleation kinetic processes. This review focuses on the development of MDC process models and on crystallization control strategies. In addition, the most important innovative applications of MDC in the last five years in crystal engineering and pharmaceutical manufac- turing are summarized.

关键词： membrane distillation crystallization mathe-matics model nucleation separation hybrid process

Unsupervised Log Anomaly Detection Method Based on Multi-Feature

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Computers, Materials & Continua 2023年第7期76卷 517-541页

作者： Shiming He tuo Deng Bowen chen R.Simon Sherratt Jin Wang School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410114China School of Systems Engineering The University of ReadingRG66AYUK

Log anomaly detection is an important paradigm for system *** log anomaly detection based on Long Short-Term Memory(LSTM)networks is time-consuming to handle long *** model is introduced to promote ***,most existing Transformer-based log anomaly detection methods convert unstructured log messages into structured templates by log parsing,which introduces parsing *** only extract simple semantic feature,which ignores other features,and are generally supervised,relying on the amount of labeled *** overcome the limitations of existing methods,this paper proposes a novel unsupervised log anomaly detection method based on multi-feature(UMFLog).UMFLog includes two sub-models to consider two kinds of features:semantic feature and statistical feature,*** applies the log original content with detailed parameters instead of templates or template IDs to avoid log parsing *** the first sub-model,UMFLog uses Bidirectional Encoder Representations from Transformers(BERT)instead of random initialization to extract effective semantic feature,and an unsupervised hypersphere-based Transformer model to learn compact log sequence representations and obtain anomaly *** the second sub-model,UMFLog exploits a statistical feature-based Variational Autoencoder(VAE)about word occurrence times to identify the final anomaly from anomaly *** experiments and evaluations are conducted on three real public log *** results show that UMFLog significantly improves F1-scores compared to the state-of-the-art(SOTA)methods because of the multi-feature.

关键词： System log anomaly detection semantic features statistical features Transformer

Estimation of inverse Compton peak frequency for 4FGL Blazars

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Science China(Physics,Mechanics & Astronomy) 2023年第4期66卷 142-157页

作者： JiangHe Yang JunHui Fan yi Liu ManXian tuo ZhiYuan Pei WenXin Yang YuHai Yuan SiLe He ShengHui Wang XiaoHai Qu YueLian Zhang JianJun Nie XiuHui chen College of Mathematics and Physics Science Hunan University of Arts and ScienceChangde 415000China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province Guangzhou 510006China

This study uses a parabolic equation to fit the Inverse Compton (IC) spectral component of 3743 blazars (794 FSRQs,1432 BLLacs,and 1517 BCUs) from the 4FGL-DR3 *** mutual correlations are investigated,and a Bayesian classification is performed to the IC peak *** analyses draw the following conclusions:(1) The Bayesian classification shows two components with a dividing boundary of log(v_(p)^(IC)/Hz)pIC=***,the 3743 blazars are divided into low IC peak frequency(LCP) blazars and high IC peak frequency (HCP) blazars.(2) A strong linear correlation exists between IC peak frequency(logv_(p)^(IC)) and γ-ray photon spectral index (Γ).The IC peak frequency can be estimated by an empirical relation logv_(p)^(IC)=–4.5·Γ+32.8 for BL Lacs and logv_(p)^(IC)=4.0+31.4pICfor FSRQs,which is consistent with the result by Abdo et al.(3) The ICspectral curvature and IC peak frequency are not as closely related as the synchrotron curvature and the synchrotron peak frequency.(4) An anti-correlation exists between IC peak frequency and IC peak luminosity,implying that as the IC peak frequency in the γ-ray band decreases,the source becomes more *** beaming effect is stronger for the source with a lower IC peak frequency.(5) Positive correlations exist between IC and synchrotron components for both peak frequencies and peak fluxes,but no clear correlation exists between IC curvature and synchrotron curvature.

关键词： active galactic nuclei Fermi blazars spectral energy distribution inverse Compton emission

Multi-domain equivalent method for prediction of elastic modulus of complex fractured rock mass

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Journal of Mountain Science 2023年第3期20卷 859-872页

作者： JIAO Feng-yu WANG Hui-dong LI tuo chen Yun MA Guo-wei School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China Tianjin Key Laboratory of Prefabricated Building and Intelligent Construction Hebei University of TechnologyTianjin 300401China

Reliable estimation of deformation and failure behaviors of fractured rock mass is important for practical engineering *** study proposes a multi-domain equivalent method for fracture network to estimate the deformation properties of complex fractured rock *** comprehends both the advantages of the discrete fracture network model and the equivalent continuum model to capture the features of discontinuities explicitly while reducing computational *** complex fracture network is stochastically split into a number of subfracture networks according to the domain,length or *** analytical solution is derived to infer theoretically the relationship between the elastic moduli of the original complex fractured rock mass and the split subfractured rock masses by introducing a correction term based on the deformation superposition *** simulations are conducted to determine the elastic moduli of split subfractured rock masses using universal distinct element code(UDEC),while the elastic modulus of the original model is estimated based on the currently proposed analytical *** results show that the estimation accuracy with the current domainbased splitting model is far superior compared to those with the other two splitting ***,the estimation method of elastic modulus of complex fractured rock mass based on domain splitting mode of fracture network is identified as the multi-domain equivalent method proposed in this *** reliability of this method is evaluated,and its high computational efficiency is demonstrated through exemplification with regard to different geometric configurations for stochastically artificial discrete fracture *** proposed multi-domain equivalent method constructs the theoretical framework except for the regression analysis hypothesis compared to the density-reduced model equivalent method.

关键词： Fractured rock masses Discrete fracture network Rock mass deformability Multi-domain equivalent method

Unraveling post-growth mechanisms of monolayer CsPbBr3 nanocubes:Laser-enhanced transformations and cathodoluminescence-electron microscopy correlations

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Journal of Energy Chemistry 2025年第1期100卷 146-156页

作者： Mingxing Li Xiaoge Wang Xiaofan Cao Zhiqun He Chunjun Liang Mingxing chen Jing Ju Fangtian You Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic Technology Beijing Jiaotong University Beijing National Laboratory for Molecular Sciences (BNLMS) College of Chemistry and Molecular Engineering Peking University

Lead-halide perovskite nanoparticles（LHP NPs） are highly promising materials for next-generation displays and solid-state lighting due to their exceptional optical properties. However, their inherent instability presents a significant challenge. Recent advances have demonstrated that optoelectronic devices based on monolayer nanoparticle films exhibit both high luminescence efficiency and long-term *** research demonstrates that mobility limitations and anisotropic alignments in CsPbBr3nanocube monolayer films are key to their stabilization, hindering spontaneous growth through face-to-face fusion and resulting in the formation of connecting necks in a diagonal direction. Introducing laser irradiation confirmed this by significantly accelerating nanocubes growth, increasing mobility, and enhancing local structural ordering, leading to larger and more regularly shaped nanosheets. Fourier transform infrared spectroscopy and energy dispersive spectroscopy line-scan analyses indicated that laser irradiation did not disrupt the ligand structure. Transmission electron microscopy and correlative cathodoluminescence electron microscopy revealed the effects of post-growth and heterogeneous structures, including enhanced luminescence and inhomogeneous intensity in the nanosheets. These findings deepen the understanding of the post-growth mechanism of monolayer nanoparticles and the structure-emission correlation and highlight the unique role of laser irradiation in directing the formation of well-defined and regular nanostructures.

关键词： Post-growth mechanism Heterogeneous structure Single-particle spectroscopy Laser irradiation

Utilizing engineered extracellular vesicles as delivery vectors in the management of ischemic stroke:a special outlook on mitochondrial delivery

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Neural Regeneration Research 2025年第8期20卷 2181-2198页

作者： Jiali chen yiyang Li Xingping Quan Jinfen chen Yan Han Li Yang Manfei Zhou Greta Seng Peng Mok Ruibing Wang Yonghua Zhao Institute of Chinese Medical Sciences State Key Laboratory of Quality Research in Chinese MedicineUniversity of MacaoTaipaMacao Special Administrative RegionChina Department of Pharmacy Hunan Provincial People’s Hospitalthe First Affiliated Hospital of Hunan Normal UniversityChangshaHunan ProvinceChina Department of Electrical and Computer Engineering University of MacaoTaipaMacao Special Administrative RegionChina Department of Pharmaceutical Sciences Faculty of Health SciencesUniversity of MacaoTaipaMacao Special Administrative RegionChina

Ischemic stroke is a secondary cause of mortality worldwide,imposing considerable medical and economic burdens on *** vesicles,serving as natural nanocarriers for drug delivery,exhibit excellent biocompatibility in vivo and have significant advantages in the management of ischemic ***,the uncertain distribution and rapid clearance of extracellular vesicles impede their delivery *** utilizing membrane decoration or by encapsulating therapeutic cargo within extracellular vesicles,their delivery efficacy may be greatly ***,previous studies have indicated that microvesicles,a subset of large-sized extracellular vesicles,can transport mitochondria to neighboring cells,thereby aiding in the restoration of mitochondrial function post-ischemic *** extracellular vesicles have also demonstrated the capability to transfer mitochondrial components,such as proteins or deoxyribonucleic acid,or their sub-components,for extracellular vesicle-based ischemic stroke *** this review,we undertake a comparative analysis of the isolation techniques employed for extracellular vesicles and present an overview of the current dominant extracellular vesicle modification *** the complex facets of treating ischemic stroke,we also delineate various extracellular vesicle modification approaches which are suited to different facets of the treatment ***,given the burgeoning interest in mitochondrial delivery,we delved into the feasibility and existing research findings on the transportation of mitochondrial fractions or intact mitochondria through small extracellular vesicles and microvesicles to offer a fresh perspective on ischemic stroke therapy.

关键词： delivery engineering extracellular vesicles identification ischemic stroke isolation mitochondria targeting strategy therapeutic effects

Global Regularity for Einstein-Klein-Gordon System with U(1)×R Isometry Group,I

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Chinese Annals of Mathematics,Series B 2020年第6期41卷 939-966页

作者： Haoyang chen yi ZHOU School of Mathematical Sciences Fudan UniversityShanghai 200433China

This is the first of the two papers devoted to the study of global regularity of the 3+1 dimensional Einstein-Klein-Gordon system with a U(1)×R isometry *** this first part,the authors reduce the Cauchy problem of the Einstein-Klein-Gordon system to a 2+1 dimensional ***,the authors will give energy estimates and construct the null coordinate system,under which the authors finally show that the first possible singularity can only occur at the axis.

关键词： Einstein-Klein Gordon system Cauchy problem Energy estimates Null coordinate First singularity