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On Edge Connectivity and Parity Factor

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Acta Mathematica Sinica,English Series 2015年第5期31卷 772-776页

作者： Hong Liang LU Wei WANG yuqing lin School of Mathematics and Statistic Xi'an Jiaotong University School of Electrical Engineering and Computer Science The University of Newcastle

By Petersen＇s Theorem, a bridgeless cubic graph has a 2-factor. Fleischner （Discrete Math., 101, 33-37 （1992）） has extended this result to bridgeless graphs of minimum degree at least three by showing that every such graph has an even factor without isolated vertices. Let me〉 0 be even and mo〉 0 be odd. In this paper, we prove that every me-edge-connected graph with minimum degree at least me ＋ 1 contains an even factor with minimum degree at least me and every （mo ＋ 1）- edge-connected graph contains an odd factor with minimum degree at least too, which further extends Fleischner＇s result. Moreover, we show that our results are best possible.

关键词： Edge connectivity parity factor

基于模糊隶属度分布函数的博斯腾湖景观适宜水位确定

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水资源保护 2024年第3期40卷 116-124页

作者：刘洋李江陈诚林育青莫康乐胡明涛李沁园陈求稳南京水利科学研究院生态环境研究所江苏南京210029 新疆塔里木河流域管理局新疆库尔勒841000 河海大学长江保护与绿色发展研究院江苏南京210098

采用层次分析法识别博斯腾湖景观关键点,基于湖泊特征水位分析,构建了景观关键点水位和景观适宜度的模糊隶属度分布函数,计算了不同季节博斯腾湖景观适宜水位范围。结果表明:湖泊水质、年旅游业收益是识别博斯腾湖景观关键点的主要因素... 详细信息

采用层次分析法识别博斯腾湖景观关键点,基于湖泊特征水位分析,构建了景观关键点水位和景观适宜度的模糊隶属度分布函数,计算了不同季节博斯腾湖景观适宜水位范围。结果表明:湖泊水质、年旅游业收益是识别博斯腾湖景观关键点的主要因素;博斯腾湖最佳景观水位为1046.70 m,低警戒水位为1045.00 m,高警戒水位为1047.90 m,低、高破坏边缘水位分别为1045.40 m和1047.40 m;不同季节博斯腾湖景观适宜水位存在差异,春季和秋季景观适宜水位范围为1045.90~1047.16 m,夏季为1046.00~1047.00 m,冬季为1045.85~1047.25 m。

关键词：景观适宜水位景观关键点模糊隶属度分布函数层次分析法博斯腾湖

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氨氮胁迫下鲢幼鱼下行洄游通道质量研究

生态科学 2024年第4期43卷 204-211页

作者：计红林育青陈诚何梦男于道平余世金万安安庆师范大学资源环境学院安庆246133 南京水利科学研究院生态环境研究所南京210029 安庆师范大学水生生物保护与水生态修复安徽省高等学校工程技术研究中心安庆246133

为定量揭示氨氮浓度对鱼类栖息地质量的影响,以淮河干流鲁台子至窑河闸段为研究区域,选择典型土著洄游鱼类鲢作为目标物种,耦合研究区域内平面二维水动力水质模型构建了含有氨氮指标的鲢幼鱼下行洄游通道栖息地模型。假定入流边界氨氮... 详细信息

为定量揭示氨氮浓度对鱼类栖息地质量的影响,以淮河干流鲁台子至窑河闸段为研究区域,选择典型土著洄游鱼类鲢作为目标物种,耦合研究区域内平面二维水动力水质模型构建了含有氨氮指标的鲢幼鱼下行洄游通道栖息地模型。假定入流边界氨氮浓度满足地表水Ⅲ类水质标准(1.0 mg·L^(-1)),选取栖息地面积、栖息地斑块数和栖息地连通性指数三个景观生态学特征指标,定量评估了高、中、低三组代表性流量下氨氮对鲢幼鱼下行洄游通道质量的影响。结果表明:与不考虑氨氮指标情况下的洄游通道质量相比,(1)鲢幼鱼下行洄游通道适宜生境面积分别下降1.6%、6.7%和3.4%,氨氮对洄游通道适宜生境面积的影响较小。(2)鲢幼鱼下行洄游通道斑块数分别增加4.5%、28.7%和3.6%,在原本具有较高破碎度的情况下氨氮影响最大,二者存在一定程度的正相关和协同效应。(3)鲢幼鱼下洄游通道连通性分别降低54.3%、34.6%和24.8%,连通性下降幅度与入流边界流量成反比。研究结果可为鱼类栖息地指标体系构建和基于水质需求的生态流量调度提供依据。

关键词：氨氮鲢幼鱼栖息地模型二维水质模拟洄游通道

Surface Electrostatic Potentials of Polychlorinated Dibenzofurans and Their Applications in Quantitative Structure-toxicity Relationships

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Chinese Journal of Structural Chemistry 2005年第4期24卷 407-412页

作者： ZOUJian-Wei HUGui-Xiang JIANGYong-Jun ZENGMin ZHUANGShu-lin yuqing-Sen KeyLaboratoryforMolecularDesignandNutritionEngineering NingboInstituteofTechnolog3 ZhejiangUniversity Ningbo315104China

Polychlorinated dibenzofurans (PCDFs) represent an important kind of serious pollutant. They are highly toxic and persistent in environment. In this paper, geometrical optimizations and subsequent calculations of electrostatic potentials (ESPs) on molecular surface have been performed for all 135 PCDF congeners at the HF/6-31G* level. The effects of substitution value and variation of substitution position upon the surface ESPs have been discussed. A series of statistic-based structural descriptors derived from the surface ESPs have been calculated. For some PCDF congeners, linear relationships between aryl hydrocarbon receptor (AhR) biding affinity and aryl hydrocarbon hydroxylase (AHH) induction potency as well as theoretical descriptors have been established by multiple linear regression method. It appears that the quantities derived from the surface ESPs, Vs,min, Vs , VS +, σ+ and Nvmin, 2 together with the molecular surface area and the energy gap between HOMO and LUMO can be well used to express the quantitative structure-toxicity relationships of PCDFs.

关键词： QSAR molecular electrostatic potential ab initio polychlorinated dibenzofuran

Transient Stability Analysis of Large-scale Power Systems:A Survey

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CSEE Journal of Power and Energy Systems 2023年第4期9卷 1284-1300页

作者： Qing-Hua Wu yuqing lin Chao Hong Yinsheng Su Tianhao Wen Yang Liu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China the Power Dispatching and Control Center China Southern Power GridGuangzhou 510530China

Transient stability analysis is a key problem in power system operation and *** paper aims at giving a comprehensive review on the modeling ideas and analysis methods for transient stability of large-scale power *** model construction,the general modeling of traditional power systems and special modeling for renewable generations and high-voltage direct-current transmissions are *** transient stability analysis,Lyapunov based methods and non-Lyapunov based methods are thoroughly *** Lya-punov based methods,we focus on the energy function method,the sum-of-squares based method and decentralized stability analysis ***,in non-Lyapunov based methods,the time-domain simulation,extended equal-area criterion and data-driven based methods are *** basic working principles,features and recent research progresses of all the above-mentioned methods are described in *** particular,their performances on several aspects,such as computational speed,conservativeness of stability region estimation or stability margin calculation,and adaptability to various types of system models,are ***,a brief discussion of potential directions for future research on transient stability analysis of large-scale power systems is *** Terms-connective stability,large-scale system analysis,Lyapunov functions,power systems,transient stability analysis.

关键词： connective stability large-scale system analysis Lyapunov functions power systems transient stability analysis

基于“主客交”学说论阴道微生态与宫颈上皮内瘤变的关系

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基层中医药 2024年第2期3卷 39-43页

作者：林雨晴吴冬梅陈秋燕福建中医药大学福建福州350122 福建中医药大学附属第二人民医院妇产科福建福州350001

试从吴有性《瘟疫论》中“主客交”学说阐述阴道微生态与宫颈上皮内瘤变的关系。本文认为,“主”素有任脉不固、带脉失约以致阴道微生态失衡,“客”乃湿热、阴虚、血瘀等致病因素,主客交浑而致宫颈上皮内瘤变。正愈虚,则邪愈盛,使疾病进... 详细信息

试从吴有性《瘟疫论》中“主客交”学说阐述阴道微生态与宫颈上皮内瘤变的关系。本文认为,“主”素有任脉不固、带脉失约以致阴道微生态失衡,“客”乃湿热、阴虚、血瘀等致病因素,主客交浑而致宫颈上皮内瘤变。正愈虚,则邪愈盛,使疾病进展,病邪久留,乘精血之衰而深入阴分和血脉之中,并与瘀滞之气血互结,是宫颈上皮内瘤变进展且最终发展为宫颈癌的重要病机。在治疗宫颈上皮内瘤变上,应初起“未病先防,既病防变”,“扶正祛邪”一以贯之;继而兼以清热利湿,行气活血;病瘥后注重调护,维持阴道微生态稳定。

关键词：阴道微生态宫颈上皮内瘤变主客交

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基于可植入电极的活体脑化学电分析研究进展

首都师范大学学报（自然科学版） 2024年第3期45卷 74-86页

作者：孔凡镇何瑞煜顾超越林雨青首都师范大学化学系北京100048

基于可植入电极的活体电化学传感研究一直是推动脑神经化学领域分析方法发展的重要助力。脑内结构的复杂性和各项生理活动的实时性对分析方法提出了严苛的要求。分析测量方法的高特异性、高灵敏度、较强的抗干扰能力以及良好的生物相容... 详细信息

基于可植入电极的活体电化学传感研究一直是推动脑神经化学领域分析方法发展的重要助力。脑内结构的复杂性和各项生理活动的实时性对分析方法提出了严苛的要求。分析测量方法的高特异性、高灵敏度、较强的抗干扰能力以及良好的生物相容性是活体原位分析的前提。随着新功能材料的研发和电化学研究方法的进步,可植入电极的活体电化学研究得到了一定的发展,但该领域仍然存在着一系列的挑战。本文综述了目前可植入电极,如酶修饰电极、核酸适配体修饰电极、离子选择性电极、基于液-液界面的电极、离子电流整流类电极在活体电化学传感领域中的应用以及其兼容性、响应性等关键性能研究的主要进展,以期为未来的复杂脑内环境下的精准检测研究提供有益借鉴。

关键词：活体电化学传感可植入电极脑神经化学活体原位分析

Superoxide-like Cu/GO single-atom catalysts nanozyme with high specificity and activity for removing superoxide free radicals

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Nano Research 2022年第10期15卷 8804-8809页

作者： Mingju Lu Jialu Wang Guoyuan Ren Fengjuan Qin Zhiqiang Zhao Kai Li Wenxing Chen yuqing lin Department of Chemistry Capital Normal UniversityBeijing 100048China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Although nanozyme has become an emerging area of research attracting extensive attention recently,the activity and specificity of currently reported nanozymes are generally lower than those of natural *** highly active and specific nanozymes is therefore extremely necessary and also remains a great *** dismutase(SOD)catalyzes the disproportionation of cytotoxic O_(2)·^(−)into hydrogen peroxide and oxygen,and plays an important role in reducing human oxidative *** this work,we prepare Cu single-atom catalysts(Cu/GO SACs,GO=graphene oxide)through a simple and low-cost strategy at room temperature using Cu foam and graphene ***/GO SACs can maintain excellent catalytic activity under harsh *** with the natural enzyme,SOD-like Cu/GO SAC nanozyme has higher catalytic activity and meanwhile,it does not possess the common properties of other mimic enzymes often existing in *** on the excellent SOD-like enzyme activity of Cu/GO SACs,it successfully eliminates the active oxygen in cigarette *** work not only provides a new idea for the design and synthesis of nanozymes with excellent SOD mimetic properties,but also is promising in the treatment of lung injury and inflammatory diseases related to free radical production.

关键词： Cu/graphene oxide(GO)single-atom catalysts(SACs) superoxide dismutase(SOD)-like activity activity specificity superoxide free radicals

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香樟bZIP基因家族鉴定及表达分析

扬州大学学报（农业与生命科学版） 2024年第3期45卷 44-54,81页

作者：朱渊铭张培兰林宇清陈丝雨苏宝川邹双全福建农林大学林学院福州350002 自然生物资源保育利用福建省高校工程技术研究中心福州350002 泉州市林业局福建泉州362000

碱性亮氨酸拉链(bZIP)基因能响应多种非生物胁迫,为探究香樟(Cinnamomum camphora)bZIP基因是否具有调控非生物胁迫的能力,对其进行全基因组鉴定和系统进化分析,并分析其保守基序、基因结构、保守结构域、理化性质及顺式作用元件。结果... 详细信息

碱性亮氨酸拉链(bZIP)基因能响应多种非生物胁迫,为探究香樟(Cinnamomum camphora)bZIP基因是否具有调控非生物胁迫的能力,对其进行全基因组鉴定和系统进化分析,并分析其保守基序、基因结构、保守结构域、理化性质及顺式作用元件。结果表明:香樟中共有56个bZIP基因(CcbZIP),分为10个亚族。同一亚家族的基因保守基序相似,而不同亚家族的基因保守基序存在较大差异。56个CcbZIP基因不均匀地分布在12条染色体上,且存在片段复制事件,香樟与毛果杨(Populus trichocarpa)的共线基因最多。CcbZIP基因家族含有光响应元件最多,还含有大量干旱、低温、厌氧等非生物胁迫响应元件和激素类响应元件。表达量分析显示,土壤肥力差的环境下多数CcbZIP基因在枝和叶中高表达,施肥后土壤肥力增强而基因表达量降低。

关键词：香樟 bZIP基因生物信息学表达量非生物胁迫