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Aeroelastic stability analysis of heated flexible panel subjected to an oblique shock

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Chinese Journal of Aeronautics 2018年第8期31卷 1650-1666页

作者： Liuqing ye Zhengyin ye Xiaochen WANG School of Aeronautics Northwestern Polytechnical University Xi'an 710072 China

The critical conditions for aeroelastic stability and the stability boundaries of a flexible two-dimensional heated panel subjected to an impinging oblique shock are considered using theoretical analysis and numerical computations, respectively. The von-Karman large deflection theory of isotropic flat plates is used to account for the geometrical nonlinearity of the heated panel, and local first-order piston theory is employed in the region before and after shock waves to estimate the aerodynamic pressure. The coupled partial differential governing equations, according to the Hamilton principle, are established with thermal effect based on quasi-steady thermal stress *** Galerkin discrete method is employed to truncate the partial differential equations into a set of ordinary differential equations, which are then solved by the fourth-order Runge-Kutta numerical integration method. Lyapunov indirect method is applied to evaluate the stability of the heated panel. The results show that a new aeroelastic instability（distinct from regular panel flutter） arises from the complex interaction of the incident and reflected wave system with the panel flexural modes and thermal loads. What＇s more, stability of the panel is reduced in the presence of the oblique shock. In other words, the heated panel becomes aeroelastically unstable at relatively small flight aerodynamic pressure.

关键词： AerothermoelasticityHeated panel Local piston theory Shock waves Stability Thermal flutter

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

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Science China Earth Sciences 2016年第4期59卷 707-719页

作者： ye Yu State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences

There are potentially huge amounts of water stored in Earth's mantle, and the water solubilities in the silicate minerals range from tens to thousands of part per minion(ppm, part per million). Exploring water in the mantle has attracted much attention from the societies of mineralogy and geophysics in recent years. In the subducting slab, serpentine breaks down at high temperature, generating a series of dense hydrous magnesium silicate(DHMS) phases, such as phase A, chondrodite, clinohumite, etc. These phases may serve as carriers of water as hydroxyl into the upper mantle and the mantle transition zone(MTZ). On the other hand, wadsleyite and ringwoodite, polymorphs of olivine, are most the abundant minerals in the MTZ, and able to absorb significant amount of water(up to about 3 wt.% H_2O). Hence, the MTZ becomes a very important layer for water storage in the mantle, and hydration plays important roles in physics and chemistry of the MTZ. In this paper, we will discuss two aspects of hydrous silicate minerals:(1) crystal structures and(2) equations of state(Eo Ss).

关键词： Hydrous silicate mineral Crystal structure Equation of state(Eo S) Mantle transition zone(MTZ) Wadsleyite Ringwoodite

Privacy Preserving and Delegated Access Control for Cloud Applications

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Tsinghua Science and Technology 2016年第1期21卷 40-54页

作者： Xinfeng ye Department of Computer Science The University of Auckland

In cloud computing applications, users＇ data and applications are hosted by cloud providers. This paper proposed an access control scheme that uses a combination of discretionary access control and cryptographic techniques to secure users＇ data and applications hosted by cloud providers. Many cloud applications require users to share their data and applications hosted by cloud providers. To facilitate resource sharing, the proposed scheme allows cloud users to delegate their access permissions to other users easily. Using the access control policies that guard the access to resources and the credentials submitted by users, a third party can infer information about the cloud users. The proposed scheme uses cryptographic techniques to obscure the access control policies and users＇ credentials to ensure the privacy of the cloud users. Data encryption is used to guarantee the confidentiality of data. Compared with existing schemes, the proposed scheme is more flexible and easy to use. Experiments showed that the proposed scheme is also efficient.

关键词： cloud computing access control security

Fault tolerant channel-encrypting quantum dialogue against collective noise

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Science China(Physics,Mechanics & Astronomy) 2015年第4期58卷 1-10页

作者： ye TianYu College of Information & Electronic Engineering Zhejiang Gongshang University

In this paper,two fault tolerant channel-encrypting quantum dialogue(QD)protocols against collective noise are *** is against collective-dephasing noise,while the other is against collective-rotation *** decoherent-free states,each of which is composed of two physical qubits,act as traveling states combating collective ***-Podolsky-Rosen pairs,which play the role of private quantum key,are securely shared between two participants over a collective-noise channel in *** encryption and decryption with private quantum key,the initial state of each traveling two-photon logical qubit is privately shared between two *** to quantum encryption sharing of the initial state of each traveling logical qubit,the issue of information leakage is *** private quantum key can be repeatedly used after rotation as long as the rotation angle is properly chosen,making quantum resource *** a result,their information-theoretical efficiency is nearly up to 66.7%.The proposed QD protocols only need single-photon measurements rather than two-photon joint measurements for quantum *** analysis shows that an eavesdropper cannot obtain anything useful about secret messages during the dialogue process without being ***,the proposed QD protocols can be implemented with current techniques in experiment.

关键词： quantum dialogue (QD) quantum encryption information leakage decoherent-free (DF) state collective-dephasingnoise collective-rotation noise

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电动拖拉机双电源并联控制研究

农机化研究 2025年第1期47卷 234-238页

作者：初香港王宝超陈叶青岛农业大学机电工程学院山东青岛266109

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建... 详细信息

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建了系统模型。仿真试验表明:单电源可以实现升压稳压控制;基于下垂控制的双电源并联均流能够实现双电源的电流均流;当切换不同功率负载时,系统电压随功率增加按比例下调,验证了该方案的可行性。

关键词：电动拖拉机双电源并联下垂控制动态仿真

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Skeletal muscle-specific Bambi deletion induces hypertrophy and oxidative switching coupling with adipocyte thermogenesis against metabolic disorders

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Science China Life Sciences 2025年

作者： Xiangping Yao Xudong Mai ye Tian Yifan Liu Guanghui Jin Ze Li Shujie Chen Xiaoshuang Dai Liujing Huang Zijing Fan Guihua Pan Xiaohan Pan Xiangmin Li Michael C Yu Jia Sun Jingxing Ou Hong Chen Liwei Xie College of Life and Health Sciences Guangdong Industry Polytechnic Department of Endocrinology and Metabolism Zhujiang Hospital Southern Medical University State Key Laboratory of Applied Microbiology Southern China Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application Guangdong Open Laboratory of Applied MicrobiologyInstitute of Microbiology Guangdong Academy of Sciences Institute of Aging Research Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics School of Medical Technology Guangdong Medical University Department of Hepatic Surgery and Liver transplantation Center of the Third Affiliated Hospital Organ Transplantation Institute Sun Yat-sen University Organ Transplantation Research Center of Guangdong ProvinceGuangdong province engineering laboratory for transplantation medicine Guangdong Provincial Key Laboratory of Liver Disease Research School of Public Health Xinxiang Medical University BGI Institute of Applied Agriculture BGI-Shenzhen Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Department of Biological Sciences State University of New York at Buffalo Department of Internal Medicine Shunde Women and Children's Hospital (Maternity and Child Healthcare Hospital of Shunde Foshan) Guangdong Medical University

Skeletal muscle plays a significant role in both local and systemic energy metabolism. The current investigation aims to explore the role of the Bambi gene in skeletal muscle, focusing on its implications for muscle hypertrophy and systemic metabolism. We hypothesize that skeletal muscle-specific deletion of Bambi induces muscle hypertrophy, improves metabolic performance, and activates thermogenic adipocytes via the reprogramming of progenitor of i WAT, offering potential therapeutic strategies for metabolic syndromes. Leveraging the Chromatin immunoprecipitation(ChIP)-seq and bioinformatics analysis, Bambi gene is shown to be a direct target of HIF2α, which is further confirmed by ChIP-qPCR and promoter luciferase assay. Skeletal muscle-specific Bambi deletion led to significant muscle hypertrophy and improved metabolic parameters, even under high-fat diet conditions. This deletion induced metabolic reprogramming of stromal vascular fractions(SVFs) into thermogenic adipocytes, contributing to systemic metabolic improvements, potentially through the secretory ***, mice with skeletal muscle-specific Bambi deletion demonstrate resistance to high-fat diet-induced metabolic disorders, highlighting a potential therapeutic pathway for metabolic syndrome management. Thus, skeletal muscle-specific deletion of Bambi triggers muscle growth, enhances metabolic performance, and activates thermogenic adipocytes. These findings suggest Bambi as a novel therapeutic target for metabolic syndromes, providing new insights into the interaction between muscle hypertrophy and systemic metabolic improvement. The study underscores the potential of manipulating muscle physiology to regulate whole-body metabolism, offering a novel perspective on treating metabolic disorders.

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Advances and applications in single-cell and spatial genomics

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Science China Life Sciences 2025年

作者： Jingjing Wang Fang ye Haoxi Chai Yujia Jiang Teng Wang Xia Ran Qimin Xia Ziye Xu Yuting Fu Guodong Zhang Hanyu Wu Guoji Guo Hongshan Guo Yijun Ruan Yongcheng Wang Dong Xing Xun Xu Zemin Zhang Beijing Advanced Innovation Center for Genomics (ICG) Peking University Guangdong Provincial Key Laboratory of Genome Read and Write BGI Research Bone Marrow Transplantation Center of the First Affiliated Hospital & Liangzhu Laboratory Zhejiang University School of Medicine Life Sciences Institute and The Second Affiliated Hospital Zhejiang University BGI Research Biomedical Pioneering Innovation Center (BIOPIC) and School of Life Sciences Peking University Academy for Advanced Interdisciplinary Studies Peking University Institute of Hematology Zhejiang University Department of Laboratory Medicine of The First Affiliated Hospital & Liangzhu Laboratory Zhejiang University School of Medicine Center for Stem Cell and Regenerative Medicine Zhejiang University School of Medicine Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine Dr.Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine

The applications of single-cell and spatial technologies in recent times have revolutionized the present understanding of cellular states and the cellular heterogeneity inherent in complex biological systems. These advancements offer unprecedented resolution in the examination of the functional genomics of individual cells and their spatial context within tissues. In this review, we have comprehensively discussed the historical development and recent progress in the field of single-cell and spatial genomics. We have reviewed the breakthroughs in single-cell multi-omics technologies, spatial genomics methods, and the computational strategies employed toward the analyses of singlecell atlas data. Furthermore, we have highlighted the advances made in constructing cellular atlases and their clinical applications,particularly in the context of disease. Finally, we have discussed the emerging trends, challenges, and opportunities in this rapidly evolving field.

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中国乡镇教育行政机构发展历程、运行模式及变革走向

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北京教育学院学报 2025年第1期39卷 1-8页

作者：司洪昌韩烨国家教育行政学院科研处北京102617 国家教育行政学院教育行政教研部北京102617

自新中国成立以来,乡镇教育行政机构经历了从隶属于乡镇政府到隶属于县教育局的转变。2002年起,乡镇教育行政机构归属于县教育局垂直管理,这一体制运行至今,各地乡镇教育行政机构名称复杂而多元,且存在多样化的模式。乡镇教育行政机构... 详细信息

自新中国成立以来,乡镇教育行政机构经历了从隶属于乡镇政府到隶属于县教育局的转变。2002年起,乡镇教育行政机构归属于县教育局垂直管理,这一体制运行至今,各地乡镇教育行政机构名称复杂而多元,且存在多样化的模式。乡镇教育行政机构的地方属性,给乡镇教育管理预留了政策空间。当前乡镇教育行政机构重构的窗口期已开启,各地根据区域方位、县域及乡镇面积大小与人口多少、居民点分布及经济发展水平等做出适应地方实际的动态调整,成为未来十年的一个重要趋势。

关键词：乡镇教育教育行政机构乡镇中心校

重庆缙云山国家级自然保护区边缘区土地利用冲突评估研究

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园林 2025年第1期42卷 33-43页

作者：彭琳陈烨重庆大学建筑城规学院重庆400030

随着全球城市化地区的快速扩张,城市化压力下自然保护地的持久性和保护成效问题备受国内外关注。在权衡自然保护和城市社会经济发展的过程中,城市自然保护地边缘区土地利用冲突问题成为保护利用协调管理的难点及保护成效的关键影响因子... 详细信息

随着全球城市化地区的快速扩张,城市化压力下自然保护地的持久性和保护成效问题备受国内外关注。在权衡自然保护和城市社会经济发展的过程中,城市自然保护地边缘区土地利用冲突问题成为保护利用协调管理的难点及保护成效的关键影响因子,亟需科学的土地冲突评估方法作为精准介入的技术支撑。构建由制度性冲突、保护利用冲突、不同利用方式冲突三类构成的城市自然保护地边缘区土地利用冲突分类和评估框架,采用矩阵分析法、MaxEnt生境模拟法、土地多宜性分析法等方法,以位于重庆主城的缙云山国家级自然保护区为案例地进行实证运用。识别结果表明,从冲突规模来看,不同利用方式冲突易发区的面积最大,制度性冲突易发区的面积最小;从冲突类型来看,不同利用方式冲突与保护利用冲突的分布重叠度较高;从冲突强度来看,高强度的土地利用冲突大部分位于城镇化程度较高的区域。从空间规划和冲突治理两个方面,提出了缙云山国家级自然保护区边缘区的规划调控建议,为城市自然保护地边缘区的规划管理政策制定提供支撑。

关键词：城市自然保护地土地利用冲突边缘区土地多宜性分析法 MaxEnt生境模拟法缙云山国家级自然保护区