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Analysis on Relationship between Adjustment of Agricultural Structure and Urbanization Development

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Asian Agricultural Research 2014年第1期6卷 1-5,13页

作者： Jinhua tang Yinghui LI Hongxia LI yilin LIU Gangqiang CHEN Department of Tourism Management Changsha University

As a part of certain region,agricultural development has inevitable connection with regional urbanization,and they are highly heterogeneous and complementary in space. Their internal relationship is manifested as agricultural structure suits demand of urbanization development through adjustment in the process of urbanization,while urbanization is based on development of regional agriculture. From history of world agriculture and urbanization development,agriculture firstly provides primitive accumulation for urbanization development,and drives regional urbanization through promoting agricultural development. When urbanization develops to certain stage,urbanization accumulation increases and reaches the goal of " boosting urbanization through agriculture". If urbanization develops slowly,agricultural adjustment will lack motive force. On the contrary,weak agricultural development will lead to stagnation of urbanization. Therefore,adjustment of agricultural structure and urbanization development are interconnected,mutually promoted and restricted,and interdependent.

关键词： Adjustment of agricultural structure Urbanization

基于稀疏注意力卷积ViT模型的锌浮选工况识别

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工程科学学报 2025年第2期47卷 328-338页

作者：苏越唐朝晖谢永芳高小亮张虎马炜烨汤海玚中南大学自动化学院长沙410083 中南大学数学与统计学院长沙410083

准确识别锌浮选工况并用于指导锌浮选操作,可以提高浮选效率、优化选矿过程.目前浮选现场主要通过人工肉眼观察泡沫并依据经验判断工况,这种方法主观性强,难以客观准确地评价锌浮选工况.针对该问题,本文通过研究锌浮选泡沫视觉特征和浮... 详细信息

准确识别锌浮选工况并用于指导锌浮选操作,可以提高浮选效率、优化选矿过程.目前浮选现场主要通过人工肉眼观察泡沫并依据经验判断工况,这种方法主观性强,难以客观准确地评价锌浮选工况.针对该问题,本文通过研究锌浮选泡沫视觉特征和浮选工况的密切联系,提出基于稀疏注意力卷积ViT模型的锌浮选工况识别方法.首先,所提模型融合了卷积神经网络(Convolutional neural networks,CNN)和视觉Transformer(Vision transformer,ViT)的结构和优点,同时感知泡沫局部空间信息和全局信息,完备表征泡沫图像.其次,模型引入稀疏的多头注意力机制,每个注意力头以不同的稀疏程度处理特征,从不同尺度下感知全局信息,同时引入注意力门控单元优化特征传递,最终实现锌浮选工况识别.实验结果表明,本文所提工况识别方法在锌浮选泡沫图像数据集上的准确率达到88.62%,解决了传统CNN和ViT模型不能充分利用泡沫图像全局信息,且无法自适应捕捉泡沫图像重要特征的问题,为浮选流程优化提供有力支持.

关键词：工况识别卷积神经网络视觉Transformer 稀疏注意力泡沫浮选

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Harboring CAR-T cells using an injectable scaffold to treat solid tumors

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National Science Review 2024年第5期11卷 91-92页

作者： Li tang Institute of Bioengineering (IBI) école polytechnique fédérale de Lausanne (EPFL)

Genetic expression of chimeric antigen receptors (CAR) enables T cells to target and kill cancer cells in an MHCindependent manner, resulting in a potent antitumor response [1]. To date, more than 10 CAR-T cell products have been approved globally for the treatment of hematologic disorders such as relapsed/refractory B-cell acute lymphoblastic leukemia, non-Hodgkin lymphoma, and multiple myeloma [2,3].

关键词： scaffold cells solid treat harboring injectable tumors using

Non-noble metal anode based dual-ion batteries： promising high-energy and low-cost energy storage devices

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Science China Materials 2017年第4期60卷 368-370页

作者： Zhiyong tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China

Lithium-ion batteries(LIBs),as one of the most commonly used electrochemical energy storage devices,have dominated todays markets for portable electronics and electric vehicles[1].Llowever,their energy density cannot yet satisfy the increasing requirement,so it is imperative for developing next-generation batteries with high energy density together with long cycling life and good *** recent years,a novel type of battery called as

关键词：科学研究材料学工程材料中国

Global change hydrology:Terrestrial water cycle and global change

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Science China Earth Sciences 2020年第3期63卷 459-462页

作者： Qiuhong tang Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences University of Chinese Academy of Sciences

*** Global Change Hydrology(GCH)is an emerging interdisciplinary field that links global change research and *** integrates hydrology,climatology,and geography to study the interactions between the terrestrial water cycle and global change across various time and space *** main objective of GCH is to understand the natural and anthropogenic causes of the changing terrestrial water cycle and the associated influences and feedbacks in the Earth system.

关键词： hydrology terrestrial Global

Multi-objective optimization strategies using adjoint method and game theory in aerodynamics

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Acta Mechanica Sinica 2006年第4期22卷 307-314页

作者： Zhili tang College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

There are currently three different game strategies originated in economics：（1） Cooperative games （Pareto front）, （2） Competitive games （Nash game） and （3） Hierarchical games （Stackelberg game）. Each game achieves different equilibria with different performance, and their players play different roles in the games. Here, we introduced game concept into aerodynamic design, and combined it with adjoint method to solve multi- criteria aerodynamic optimization problems. The performance distinction of the equilibria of these three game strategies was investigated by numerical experiments. We computed Pareto front, Nash and Stackelberg equilibria of the same optimization problem with two conflicting and hierarchical targets under different parameterizations by using the deterministic optimization method. The numerical results show clearly that all the equilibria solutions are inferior to the Pareto front. Non-dominated Pareto front solutions are obtained, however the CPU cost to capture a set of solutions makes the Pareto front an expensive tool to the designer.

关键词： Multi-objective optimization. Pareto front Nash game Stackelberg game Adjoint method

Cramer-Rao bound and signal-to-noise ratio gain in distributed coherent aperture radar

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Journal of Systems Engineering and Electronics 2014年第2期25卷 217-225页

作者： Peilin Sun Jun tang Xiaowei tang Department of Electronic Engineering Tsinghua University

This paper studies the estimation performance of the coherent processing parameter （CPP）, including time delay differences and phase synchronization errors among different apertures of the distributed coherent aperture radar （DCAR）. Firstly, three architectures of signal processing in the DCAR are introduced. Secondly, the closed-form Cramer-Rao bound （CRB） of the CPP estimation is derived and compared. Then, the closed-form CRB is verified by numerical simulations. Finally, when the next generation radar works in a fully coherent mode, the closed-form signal-to-noise ratio （SNR） gain of the three architectures is presented.

关键词： Cramer-Rao bound (CRB) joint parameter estimation,distributed coherent aperture radar (DCAR).

Direct knitting privileged molecular catalysts into recyclable single-site catalysts with enhanced activity

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Science China Chemistry 2020年第4期63卷 419-420页

作者： Yong tang State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

An ideal strategy for catalyst immobilization is taking advantage of the widely well studied homogeneous molecular catalysts and transforming them directly into highly efficient and recyclable heterogeneous ***,the obtained heterogeneous catalysts often have inferior activity due to altered chemical environment around active centers and decreased mass/heat transfer[1,2].

关键词： catalysts molecular centers

Robust Consensus Tracking of Heterogeneous Multi-Agent Systems Under Switching Topologies

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Journal of Systems Science & Complexity 2016年第5期29卷 1226-1237页

作者： tang Yutao School of Automation Beijing University of Posts and Telecommunications

This paper considers a robust consensus tracking problem of heterogeneous multi-agent systems with time-varying interconnection topologies. Based on common Lyapunov function and internal model techniques, both state and output feedback control laws are derived to solve this *** proposed design is robust by admitting some parameter uncertainties in the multi-agent system.

关键词： Internal model multi-agent system robust consensus tracking switching topology.