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Identifying Three New AGNs among Fermi Unidentified Gigaelectronvolt Sources

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Research in Astronomy and Astrophysics 2024年第7期24卷 257-267页

作者： Shun-Hao Ji zhong-xiang Wang Qiang-Meng Huang Ruo-Heng Yang Department of Astronomy School of Physics and AstronomyYunnan UniversityKunming 650091China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China

We report our identification of three gigaelectronvoltγ-ray sources,4FGL J0502.6+0036,4FGL J1055.9+6507,and 4FGL J1708.2+5519,as Active Galactic Nuclei(AGNs).They are listed in the latest Fermi-Large Area Telescope source catalog as unidentified *** find that the sources all showedγ-ray flux variations in recent *** different survey catalogs,we are able to find a radio source within the error circle of each source's *** analysis of optical sources in the fields allows us to determine the optical counterparts,which showed similar variation patterns to those seen inγ-*** optical counterparts have reported redshifts of 0.6,1.5,and 2.3,respectively,estimated from photometric *** addition,we also obtain an X-ray spectrum of 4FGL J0502.6+0036 and a flux upper limit on the X-ray emission of 4FGL J1055.9+6507 by analyzing the archival *** broadband spectral energy distributions of the three sources from radio toγ-rays are *** mainly theγ-ray properties of the three sources with those of different sub-classes of AGNs,we tentatively identify them as *** optical spectroscopy is highly warranted for obtaining their spectral features and thus verifying the identification.

关键词： gamma-rays galaxies-(galaxies)BL Lacertae objects general-(galaxies)quasars general

一株小菇属天麻萌发菌原生质体的制备、再生和应用

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陕西科技大学学报 2025年第1期43卷 58-66页

作者：李宏敬李锡琴粟忠祥仇全雷雷云霆西南林业大学林学院云南昆明650224 中国科学院昆明植物研究所云南昆明650201 昆明市林草局西山林场云南昆明650199 西藏波密高原藏天麻产业开发有限公司西藏林芝860318

小菇属真菌(Mycena spp.)遗传转化体系是研究其促进天麻种子萌发机制的重要基础,而其原生质体的制备和再生是该体系构建的必要条件.以小菇菌株MY004为实验材料,通过单因素分析和正交试验策略,探究其原生质体制备和再生的影响因素,构建... 详细信息

小菇属真菌(Mycena spp.)遗传转化体系是研究其促进天麻种子萌发机制的重要基础,而其原生质体的制备和再生是该体系构建的必要条件.以小菇菌株MY004为实验材料,通过单因素分析和正交试验策略,探究其原生质体制备和再生的影响因素,构建小菇原生质体制备和再生体系.结果表明,在含10 mM MES和0.7 M甘露醇的酶解缓冲液(pH=6)中,小菇MY004菌丝被10 mg/mL真菌溶壁酶在24℃条件下酶解3 h,其原生质体的释放率较高;经液体再生培养基(pH=5)培养3天,其原生质体再生效率可达2%.利用该体系,高效地完成了含报告基因eGFP转基因小菇的菌株纯化.小菇原生质体制备和再生体系可用于小菇遗传转化体系的快速构建,也将为小菇与天麻互作分子机制的研究提供基础平台.

关键词：小菇原生质体制备原生质体再生转基因菌株纯化

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Composite Homogeneous Parameter Dependent Quadratic Lyapunov Functions 36

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Composite Homogeneous Parameter Dependent Quadratic Lyapunov...

An Innovative Coupled Common-Node Discrete Element Method-Smoothed Particle Hydrodynamics Model Developed with LS-DYNA and Its Applications

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作者： Guochen Pang zhong xiang Feng Zhao College of Mechanical Engineering Linyi University School of mathematical science Liaocheng University

ISBN: (纸本)9781538629185

This paper presents a new type of Lyapunov function which is called composite homogeneous parameter dependent quadratic Lyapunov function. By using this function, a condition is derived in terms of an auxiliary feedback matrix for determining if a given convex hull is an estimation of attractive region for a system under a saturated linear feedback. Most of the cases, the shape of attractive region is irregular. So, using simple ellipsoid to estimate the attractive region will bring conservativeness. However, if we use the complex polyhedron to estimate attractive region, the polyhedron is obviously more closer to attractive region than the simple ellipsoid. Along this direction, we get this polyhedron by constructing the level set of composite homogeneous parameter dependent quadratic Lyapunov function. Simulation results show the features of the proposed design the composite homogeneous parameter dependent quadratic Lyapunov function brings about.

关键词： Homogeneous polynomial functions Contractively invariance Saturating actuator Quadratic Lyapunov functions Domain of attraction

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China Ocean Engineering 2024年第3期38卷 467-482页

作者： SHEN zhong-xiang WANG Wen-qing XU Cheng-yue LUO Jia-xin LIU Ren-wei School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

In this study,a common-node DEM-SPH coupling model based on the shared node method is proposed,and a fluid–structure coupling method using the common-node discrete element method-smoothed particle hydrodynamics(DS-SPH)method is developed using LS-DYNA *** DEM and SPH are established on the same node to create common-node DEM-SPH particles,allowing for fluid–structure *** simulations of various scenarios,including water entry of a rigid sphere,dam-break propagation over wet beds,impact on an ice plate floating on water and ice accumulation on offshore structures,are *** interaction between DS particles and SPH fluid and the crack generation mechanism and expansion characteristics of the ice plate under the interaction of structure and fluid are also *** results are compared with available data to verify the proposed coupling ***,the simulation results demonstrated that controlling the cutoff pressure of internal SPH particles could effectively control particle splashing during ice crushing failure.

关键词： common-node DEM-SPH fluid-structure interaction discrete element method smoothed particle hydrodynamics

Effectivity and safety of trifocal intraocular lenses and capsular tension rings implantation for cataract patients with axial high myopia

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 499-508页

作者： Shan Hua Qiu-Xia Xie Hu Wang Jing-xiang zhong Dongguan Aier Eye Hospital Jinan UniversityDongguan 523106Guangdong ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Jinan UniversityGuangzhou 510630Guangdong ProvinceChina Department of Ophthalmology the Sixth Affiliated Hospital of Jinan UniversityDongguan 523576Guangdong ProvinceChina

●AIM:To assess effectivity and safety of trifocal intraocular lenses(IOLs)and capsular tension rings in treating cataract patients with axial high myopia.●METHODS:A prospective nonrandomized controlled clinical trial was *** 98 eyes(74 patients)who underwent femtosecond laser-assisted cataract surgery(FLACS)with trifocal IOLs were enrolled in the study and followed up for 2y after surgery:46 eyes(33 patients)with capsular tension ring implantation in the long axial lengths(AL)group(260.05).The dysfunctional lens index and total modulation transfer function(MTF)average height were similar between the two *** postoperative internal coma aberrations in the axial high myopia eyes were significantly higher than that in the normal AL group(P<0.05).The total satisfaction score in the long AL group(91.32±2.76)was slightly higher than that in the normal AL group(90.36±3.47),but there was no difference(P=0.136).A statistically negative correlation was found between corrected distance visual acuity(CDVA)and dysfunctional lens index(r=-0.382,P=0.009),and between CDVA and the total MTF average height(r=-0.374,P=0.01).But there was no significant correlation between CDVA and total satisfaction score(r=0.059,P=0.696).Postoperative complications mainly presented as posterior capsular opacity(PCO),retinal detachment and cystoid macular *** was no difference in the incidenc

关键词： trifocal intraocular lenses capsular tension ring axial high myopia cataract visual quality

Diversity of Plant Species of Alpine Grassland in Nakchu of Tibet, China

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Wuhan University Journal of Natural Sciences 2005年第4期10卷 659-664页

作者： YANYan ZENGYun-ying ZHANGJian-hui ZHANGJian-guo zhong-xiang-hao InstituteofMountainHazardsandEnvironment ChineseAcademyofSciencesChengdu610041SichuanChina／／GraduatedSchooloftheChineseAcademyofSciencesBeijing100039China~ DepartmentofCivilEngineering JiujiangCollegeJiujiang332005JiangxiChina InstituteofMountainHazardsandEnvironment ChineseAcademyofSciencesChengdu610041SichuanChina

Characteristics of plant species diversity of two types of grassland communities (alpine meadow and alpine grassland) was examined and the relationship between species diversity and community dynamics was determined using GPS positioning and in situscrutinization of community of alpine grassland in Nakchu prefecture of Tibet Autonomous Region. The result indicated that: ① there was an unobvious difference between grassland communities in terms of richness index of plant, evenness index, dominant index and diversity index. The species diversity index followed the order Kobresia humilis meadow >Stipa purpurea steppe>K. littledalei meadow; ② the original community created high diversity, while the degenerative community suffering from serious disturbance was of low diversity; ③ the diversity of community plants was closely related to changes of species biomass, and the growth and decline of species in the community; ④ grazing disturbance is a key factor of community dynamics, leading to coexistence of various secondary successions of communities, diversified suitable habitats and species diversity. improvements

关键词： alpine grassland species diversity human activity Tibet

Semiparametric Bayesian Inference for Mean-Covariance Regression Models

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Acta Mathematica Sinica,English Series 2017年第6期33卷 748-760页

作者： Han Jun YU Jun Shan SHEN Zhao Nan LI xiang zhong FANG School of Mathematical Sciences Peking University School of Statistics Capital University of Economics and Business

In this paper, we propose a Bayesian semiparametric mean-covariance regression model with known covariance structures. A mixture model is used to describe the potential non-normal distribution of the regression errors. Moreover, an empirical likelihood adjusted mixture of Dirichlet process model is constructed to produce distributions with given mean and variance constraints. We illustrate through simulation studies that the proposed method provides better estimations in some non-normal cases. We also demonstrate the implementation of our method by analyzing the data set from a sleep deprivation study.

关键词： Clustered data Dirichlet process empirical likelihood moment constraints nonparamet-ric Bayes

Analysis of Process Control Model of Plate MAS Rolling

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Journal of Iron and Steel Research International 2010年第4期17卷 31-33页

作者： ZHU Fu-wen HU Xian-lei ZHAO zhong LIU xiang-hua State Key Laboratory of Rolling Technology and Automation Northeastern University Shenyang 110004 Liaoning China

Using the identification quantity to identify the long ear disfigurement was brought up, and by calculation, it can be found that identification quantity should be set as the quantity of long ear disfigurement of the position which is about 0. 2 times of plate width to the plate border. Conception of plate head tiny cell was brought up, and the long ear disfigurement was uncoupled into the product of elongation percentage and length of tiny cell. On the basis of prediction of long ear disfigurement, process control model of MAS rolling was built up, and application indicates that it can fit the on-line production and eliminate the long ear disfigurement commendably.

关键词： plate plane shape plan view pattern MAS rolling long ear disfigurement head disfigurement

Searching for γ-ray emission from LOTAAS pulsars

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Research in Astronomy and Astrophysics 2021年第3期21卷 61-68页

作者： Qi-Wei Lu zhong-xiang Wang Yi Xing Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China University of the Chinese Academy of Sciences Beijing 100049China Department of Astronomy Yunnan UniversityKunming 650091China

The LOw-Frequency ARray(LOFAR)has recently conducted a survey(LOFAR Tied-Array Allsky Survey;LOTAAS)for pulsars in the Northern hemisphere that resulted in discoveries of 73 new *** the purpose of studying the properties of these pulsars,we search for theirγ-ray counterparts using the all-sky survey data obtained with the Large Area Telescope(LAT)onboard the Fermi Gamma-Ray Space Telescope(Fermi).We analyze the LAT data for 70 LOTAAS pulsars(excluding two millisecond pulsars and one with the longest known spin period of 23.5 s).We find one candidate counterpart to PSR J1017+30,which should be searched for theγ-ray pulsation signal once its timing solution is *** other LOTAAS pulsars,we derive their 0.3-500 GeV flux upper *** order to compare the LOTAAS pulsars with the knownγ-ray pulsars,we also derive the 0.3-500 GeVγ-ray fluxes for 112 of the latter contained in the Fermi LAT fourth source *** on the properties of theγ-ray pulsars,we derive upper limits on the spin-down luminosities of the LOTAAS *** upper limits are not very constraining but help suggest that most of the LOTAAS pulsars probably have<10^(33) erg s^(-1) spin-down luminosities and are not expected to be detectable with Fermi LAT.

关键词： stars:pulsars stars:neutron gamma rays:stars