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北京生态涵养区绿色旅游发展潜力评价及提升模式

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Journal of Resources and Ecology 2024年第2期15卷 484-495页

作者：郑倩倩唐承财张瑛中央民族大学管理学院北京100081 北京第二外国语学院旅游科学学院北京100024 北京旅游发展研究基地北京100024

旅游业的大规模快速发展使生态涵养区可持续发展面临诸多挑战。本研究通过构建生态涵养区绿色旅游发展潜力测度模型,分析北京生态涵养区绿色旅游发展潜力时空演化特征,构建北京生态涵养区绿色旅游发展潜力提升模式。结果显示:2011年至2... 详细信息

旅游业的大规模快速发展使生态涵养区可持续发展面临诸多挑战。本研究通过构建生态涵养区绿色旅游发展潜力测度模型,分析北京生态涵养区绿色旅游发展潜力时空演化特征,构建北京生态涵养区绿色旅游发展潜力提升模式。结果显示:2011年至2020年,北京生态涵养区绿色旅游发展潜力整体增长,呈现北高南低的空间特征,但各区域发展重点有异,需针对不同区域实施差别化管理措施。最后,文章构建了以“分区管理、重点落实”为指导方针,以保护性开发资源为基础力、全过程优化生态为持续力、高品质打造产业为核心力、坚持多主体参与为保障力的北京生态涵养区绿色旅游发展潜力提升模式。本研究为评价生态涵养区绿色旅游发展潜力提出一个新的测量方法,为生态涵养区绿色旅游与区域绿色发展提供了系统化的管理框架。

关键词：绿色发展绿色旅游生态涵养区发展潜力北京

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乡村文旅融合发展研究综述

地理与地理信息科学 2024年第2期40卷 126-133页

作者：郑倩倩唐承财张瑛中央民族大学管理学院北京100081 北京第二外国语学院旅游科学学院北京100024 北京旅游发展研究基地北京100024

乡村文旅融合发展越来越受到学界关注,通过梳理中英文期刊乡村文旅融合的研究成果,从整体上把握其研究态势,能为后续研究提供新思路。该文对乡村文旅融合的研究历程、研究者与发文机构、研究方法与内容进行归纳与分析,结果表明:①相较... 详细信息

乡村文旅融合发展越来越受到学界关注,通过梳理中英文期刊乡村文旅融合的研究成果,从整体上把握其研究态势,能为后续研究提供新思路。该文对乡村文旅融合的研究历程、研究者与发文机构、研究方法与内容进行归纳与分析,结果表明:①相较于英文文献,中文文献热度高、增长趋势明显、政策导向显著,经历了起步探索、初步成长、快速发展3个较稳定的发展阶段;②国内初现领军人物,但国内外尚未形成较强的核心团队和广泛的学术合作网络;③研究方法以定性方法为主,但呈现出定量方法与定性方法相结合的趋势;④研究内容主要包括乡村文旅融合资源、乡村旅游与文化关系、乡村文旅融合影响、乡村文旅融合路径四方面。未来需进一步深化研究内容、完善研究方法、构建理论体系与建立科研合作网络。

关键词：文旅融合乡村旅游乡村文化乡村振兴文化强国

Semi-GSGCN: Social Robot Detection Research with Graph Neural Network

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Computers, Materials & Continua 2020年第10期65卷 617-638页

作者： Xiujuan Wang qianqian zheng Kangfeng zheng Yi Sui Jiayue Zhang Information Technology Institute Beijing University of TechnologyBeijing100124China School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing100876China

Malicious social robots are the disseminators of malicious information on social networks,which seriously affect information security and network *** and reliable classification of social robots is crucial for detecting information manipulation in social *** classification based on manual feature extraction has been widely used in social robot ***,these methods not only involve the privacy of users but also ignore hidden feature information,especially the graph feature,and the label utilization rate of semi-supervised algorithms is *** at the problems of shallow feature extraction and low label utilization rate in existing social network robot detection methods,in this paper a robot detection scheme based on weighted network topology is proposed,which introduces an improved network representation learning algorithm to extract the local structure features of the network,and combined with the graph convolution network(GCN)algorithm based on the graph filter,to obtain the global structure features of the *** end-to-end semi-supervised combination model(Semi-GSGCN)is established to detect malicious social *** on a social network dataset(cresci-rtbust-2019)show that the proposed method has high versatility and effectiveness in detecting social *** addition,this method has a stronger insight into robots in social networks than other methods.

关键词： Social networks social robot detection network representation learning graph convolution network

Pattern dynamics of network-organized system with cross-diffusion

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Chinese Physics B 2017年第2期26卷 80-85页

作者： qianqian zheng Zhijie Wang Jianwei Shen College of Information Science and Technology Donghua University Shanghai 201620 China Institute of Applied Mathematics Xuchang University Xuchang 461000 China

Cross-diffusion is a ubiquitous phenomenon in complex networks, but it is often neglected in the study of reaction–diffusion networks. In fact, network connections are often random. In this paper, we investigate pattern dynamics of random networks with cross-diffusion by using the method of network analysis and obtain a condition under which the network loses stability and Turing bifurcation occurs. In addition, we also derive the amplitude equation for the network and prove the stability of the amplitude equation which is also an effective tool to investigate pattern dynamics of the random network with cross diffusion. In the meantime, the pattern formation consistently matches the stability of the system and the amplitude equation is verified by simulations. A novel approach to the investigation of specific real systems was presented in this paper. Finally, the example and simulation used in this paper validate our theoretical results.

关键词： cross diffusion random network Turing instability amplitude equation

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中药有效成分防治前列腺癌的研究进展

西部中医药 2024年第7期37卷 83-87页

作者：郑倩倩陈璐瑶汪涛天津中医药大学天津301617

从中医理论入手,总结中医古代医家对前列腺癌(prostate cancer,PCa)的相关论述,认为中医药具有独特优势及特点,是筛选PCa新治疗药物的资源库,多种中药有效成分在研究中已被证明可有效减缓PCa病理进程。此外还归纳了近年来中药有效成分抗... 详细信息

从中医理论入手,总结中医古代医家对前列腺癌(prostate cancer,PCa)的相关论述,认为中医药具有独特优势及特点,是筛选PCa新治疗药物的资源库,多种中药有效成分在研究中已被证明可有效减缓PCa病理进程。此外还归纳了近年来中药有效成分抗PCa的研究进展,为中医药治疗PCa提供依据和参考。

关键词：前列腺癌中医理论中药有效成分研究进展

Pattern dynamics in telegraph reaction diffusion

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Theoretical & Applied Mechanics Letters 2018年第5期8卷 355-360,364页

作者： qianqian zheng Fang Han Zhijie Wang College of Information Science and Technology Donghua University David Geffen School of Medicine University of California

Reaction-diffusion(RD)equation was often used to investigate the pattern dynamics,but telegraph reaction-diffusion(TRD)system was seldom *** this paper,the Izhikevich model was modified to explain some biological mechanisms by RD and TRD in neuronal *** a new condition under which the system loses stability was proposed and the effect of parameters,diffusion,memory and steady state were considered on the process of neuronal *** method presented is a novel approach to investigate the pattern dynamics of biological ***,simulations are carried out to validate our theoretical results.

关键词： Pattern dynamics Stability Diffusion Memory effect

A dynamically evolving war between autophagy and pathogenic microorganisms

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第1期23卷 19-41页

作者： qianqian zheng Liangwei DUAN Yang ZHANG Jiaoyang LI Shiyu ZHANG Hui WANG Henan Key Laboratory of Immunology and Targeted Drugs School of Laboratory MedicineXinxiang Medical UniversityXinxiang453003China Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine Xinxiang Medical UniversityXinxiang453003China

Autophagy is an intracellular degradation process that maintains cellular *** is essential for protecting organisms from environmental *** can help the host to eliminate invading pathogens,including bacteria,viruses,fungi,and ***,pathogens have evolved multiple strategies to interfere with autophagic signaling pathways or inhibit the fusion of autophagosomes with lysosomes to form ***,host cell matrix degradation by different types of autophagy can be used for the proliferation and reproduction of ***,determining the roles and mechanisms of autophagy during pathogen infections will promote understanding of the mechanisms of pathogen-host interactions and provide new strategies for the treatment of infectious diseases.

关键词： Autophagy Pathogenic microorganism Bacteria Virus Fungi Parasite

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基于SI模型的病毒传播动力学分析

许昌学院学报 2024年第2期43卷 12-16页

作者：杨文杰宋文利郑前前许昌学院数理学院河南许昌461000

创建了SI传播动力学模型,重点讨论了系统平衡点的存在性和稳定性,并运用连续动态系统分岔理论,利用MATLAB软件对系统的分岔情况进行了深入分析,同时考察了参数变化对系统的影响.在数值模拟阶段,对具有Holling IV型功能反应的病毒传播系... 详细信息

创建了SI传播动力学模型,重点讨论了系统平衡点的存在性和稳定性,并运用连续动态系统分岔理论,利用MATLAB软件对系统的分岔情况进行了深入分析,同时考察了参数变化对系统的影响.在数值模拟阶段,对具有Holling IV型功能反应的病毒传播系统进行了详细分析,研究了疾病传播的特点和演变规律.

关键词： SI传染病模型稳定性分岔常微分方程

Global Stability of a Three-Species System with Attractive Prey-Taxis

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Applied Mathematics 2022年第8期13卷 658-671页

作者： Mengxin Chen qianqian zheng College of Mathematics and Information Science Henan Normal University Xinxiang China School of Science Xuchang University Xuchang China

This paper reports the global asymptotic stability of a three-species predator-prey system involving the prey-taxis. With the assumptions, we establish the global asymptotic stability results of its equilibria, respectively. Our results illustrate that 1) the global asymptotic stability of the semi-trivial equilibrium does not involve the prey-taxis coefficients χ, ξ;2) the global asymptotic stability of two boundary equilibria relies on a single prey-taxis coefficient χ and ξ, respectively;3) the global asymptotic stability of the unique positive equilibrium depends on two prey-taxis coefficients χ and ξ.

关键词： Predator-Prey Model Global Asymptotic Stability Prey-Taxis Lyapunov Function