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Vertical Diffusion Coefficient with Stratification Effect for Silty Sediment Suspension Under Waves

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China Ocean Engineering 2023年第2期37卷 323-332页

作者： yang Guang-yao ZHANG Qing-he State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China

To analyze previous experimental data of suspended sediment concentration for silty sediment with different sediment particle sizes due to waves, a new stratification correction coefficient is presented. The suspended sediment concentration gradient and sediment particle diameter are selected as parameters. Furthermore, a diffusion coefficient model with a stratification effect over the whole water depth for silty sediment suspension under waves is developed. The comparison between the suspended sediment concentration calculated by the presented model and several groups of experimental data shows that the model can reasonably reflect the vertical distribution of silty sediment *** stratification effect calculated by the present model decreases with an increase in the sediment particle diameter,which indicates that the model can be extended to describe the suspended sediment concentration of fine to medium sand when the near-bottom sediment concentration is not very high. Although the original model needs to be iteratively solved, the approximate method without iteration is recommended for applications when the near bottom sediment concentration is between 10 and 20 kg/m~3 due to the small difference between the non-iterative and iterative solution for near bed layer suspended sediment concentration, which plays a major role in sediment transport.

关键词： stratification silty sediment suspension diffusion coefficient wave

CR-Morph: Controllable Rigid Morphing for 2D Animation

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Journal of Computer Science & Technology 2019年第5期34卷 1109-1122页

作者： Wen-Wu yang Jing Hua Kun-yang yao School of Computer and Information Engineering Zhejiang Gongshang UniversityHangzhou 310012China Department of Computer Science Wayne State UniversityMichigan 48202U.S.A.

This paper presents a rigidity-preserving morphing technique that blends a pair of 2D shapes in a controllable manner. The morphing is controllable in two aspects: 1) motion dynamics in the interpolation sequences can be effectively enhanced through an intuitive skeleton control and 2) not only the boundaries but also the interior features of the source and target shapes are precisely aligned during the morphing. We introduce a new compatible triangulation algorithm to decompose the source and target shapes into isomorphic triangles. Moreover, a robust and motion-controllable rigiditypreserving transformation scheme is proposed to blend the compatible triangulations, ultimately leading to a morphing sequence which is appearance-preserving and with the desired motion dynamics. Our approach constitutes a powerful and easy-to-use morphing tool for two-dimensional animation. We demonstrate its versatility, effectiveness and visual accuracy through a variety of examples and comparisons to prior work.

关键词： compatible triangulation disc-based interpolation rigid morphing skeleton-based dynamics

Preparation and thermal stability of Pd_(40.5)Ni_(40.5)Si_xP_(19-x) bulk metallic glasses

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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 204-207页

作者： yang Li yao-cen Wang Ke-fu yao Department of Mechanical Engineering Tsinghua University Beijing 100084 China

With the addition of Si to replace some P,Pd40.5Ni40.5SixP19-x（x=0,2.5,5,9.5,14,and 19 in atomic number fraction） bulk glassy samples with the diameter of about 5 mm were successfully prepared by use of flux treatment and water quenching *** the increase of Si content,the glass forming ability of Pd40.5Ni40.5Si-xP19-x increases first for low Si content and then decreases for high Si content （Si≥9.5at%）.The Pd40.50Ni40.5Si5P14 glassy alloy possesses the largest supercooled liquid region△T of 119 K,the largest reduced glass transition temperature of 0.621,and the largestγparameter of 0.460,indicating that this glassy alloy possesses very large glass forming ability and very high thermal stability.

关键词： bulk metallic glass flux method glass forming ability water quenching thermal stability

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硬碳负极材料储钠性能的影响因素分析

化学试剂 2025年第1期47卷 45-50页

作者：杨耀陈平施志聪广东工业大学材料与能源学院广东广州510000 深圳市电科电源股份有限公司广东深圳518000 衡阳电科电源有限公司湖南衡阳421000

以木质素磺酸钠和酚醛树脂为前驱体,采用喷雾干燥和油浴干燥两种方法制备硬碳前驱体,前驱体在预氧化、碳化及清洗步骤后得到硬碳材料。通过扫描电子显微镜、X射线衍射、氮气吸附/脱附测试和拉曼光谱等方法探究采用不同制备方法合成的硬... 详细信息

以木质素磺酸钠和酚醛树脂为前驱体,采用喷雾干燥和油浴干燥两种方法制备硬碳前驱体,前驱体在预氧化、碳化及清洗步骤后得到硬碳材料。通过扫描电子显微镜、X射线衍射、氮气吸附/脱附测试和拉曼光谱等方法探究采用不同制备方法合成的硬碳材料在结构形貌和物相上的差别,并通过电化学测试分析所制备的硬碳材料的电化学性能。结果表明,采用喷雾干燥法合成的硬碳前驱体制备的硬碳材料具有更稳定的球形结构和较小的比表面积。作为钠离子电池负极材料,这种硬碳材料在电池中展现出更高的首次库伦效率,并且具有更稳定的循环性能。

关键词：硬碳钠离子电池负极材料喷雾干燥油浴干燥

A dynamic signal coordination control method for urban arterial roads and its application

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Frontiers of Information Technology & Electronic Engineering 2016年第9期17卷 907-918页

作者： Guo-jiang SHEN Yong-yao yang College of Computer Science and Technology Zhejiang University of Technology Zhejiang Zheda Supcon Information Technique Co. Ltd.

We propose a novel dynamic traffic signal coordination method that takes account of the special traffic flow characteristics of urban arterial roads. The core of this method includes a control area division module and a signal coordination control module. Firstly, we analyze and model the influences of segment distance, traffic flow density, and signal cycle time on the correlation degree between two neighboring intersections. Then, we propose a fuzzy computing method to estimate the correlation degree based on a hierarchical structure and a method to divide the control area of urban arterial roads into subareas based on correlation degrees. Subarea coordination control arithmetic is used to calculate the public cycle time of the control subarea, up-run offset and down-run offset of the section, and the split of each intersection. An application of the method in Shaoxing City, Zhejiang Province, China shows that the method can reduce the average travel time and the average stop rate effectively.

关键词： Urban arterial Control subarea Coordination control Correlation degree Fuzzy logic Intelligent transportation

Motorization and Governance in America and Its Implications for China

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学术界 2014年第5期 259-266页

作者： yao yang Guangzhou Academy of Social Sciences Guangzhou Guangdong 510410

This thesis reviews the motorization of America in 20th century and studies the public governance dealing with negative impacts of motorization. The study respectively examines auto air pollution and the Clean Air Act in America,energy consumption and CAF regulations,road safety and FMVSS,traffic congestion and the traffic congestion mitigation. The fundamental objective of the thesis is to serve as a wake- up call and policy suggestions for Chinese government to mitigate the negative impacts of motorization.

关键词：中国政府机动化美国治理空气污染交通拥堵能源消耗道路安全

Urban Motorization and Traffic Congestion Challenge in the City of Beijing：Application of A Formal Policy Analysis Paradigm

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学术界 2015年第5期 279-285页

作者： yao yang Guangzhou Academy of Social Sciences Guangzhou Guangdong 510410

Public policy is the intersection of social,cultural,political,and economic *** thesis apply a formal paradigm of policy analysis widely used in America for analyzing urban motorization and traffic congestion challenge in the city of Beijing,beginning with problem identification formation of alternative policy responses,and methods of selecting the most appropriate policy response.

关键词：城市机动化交通拥堵北京市应用公共政策反应

A review of geometric calibration for different 3-D X-ray imaging systems

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Nuclear Science and Techniques 2016年第3期27卷 194-204页

作者： yang,yao Li,Liang Chen,Zhi-Qiang Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

A precise knowledge of geometry is always pivotal to a 3-D X-ray imaging system,such as computed tomography(CT),digital X-ray tomosynthesis,and computed *** get an accurate and reliable reconstruction image,exact knowledge of geometry is ***,geometric calibration has become a necessary step after completing CT system *** geometric calibration methods have been reported with the fast development of 3-D X-ray imaging *** these methods,different measuring methods,calibration phantoms or markers,and calculation algorithms were involved with their respective advantages and *** paper reviews the history and current state of geometric calibration methods for different3-D X-ray imaging *** calibration algorithms are presented and summarized,followed by our discussion and outlook.

关键词： X射线成像系统几何校正三维计算机断层扫描计算机层析成像 X射线成像技术综述校准方法

Particle agglomeration and inhibition method in the fluidized pyrolysis reaction of waste resin

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Chinese Journal of Chemical Engineering 2024年第3期67卷 135-147页

作者： Congjing Ren Peng Zhang Qi Song Zhengliang Huang yao yang Yongrong yang Ningbo Innovation Center Zhejiang UniversityNingbo 315100China College of Chemical and Biological Engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang UniversityHangzhou 310027China

This work investigated the pyrolysis reaction of waste resin in a fluidized bed *** was found that the pyrolysis-generated ash would adhere to the surface of ceramic particles,causing particle agglomeration and *** kaolin could effectively inhibit the particle agglomeration during the fluidized pyrolysis reaction through physical isolation and chemical *** the one hand,kaolin could form a coating layer on the surface of ceramic particles to prevent the adhesion of organic ash generated by the pyrolysis of *** the other hand,when a sufficient amount of kaolin(-0.2%(mass))was added,the activated kaolin could fully contact with the Na+ ions generated by the pyrolysis of resin and react to form a high-melting aluminosilicate mineral(nepheline),which could reduce the formation of low-melting-point sodium sulfate and thereby avoid the agglomeration of ceramic particles.

关键词： Pyrolysis reaction of waste resin Fluidization Particle agglomeration Kaolin