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Rational design of Co nano-dots embedded three-dimensional graphene gel as multifunctional sulfur cathode for fast sulfur conversion kinetics

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Journal of Energy Chemistry 2021年第5期30卷 132-140页

作者： Tongtao Wan Shuming Liu Changcheng Wu zhaoyang Tan Shuanglong lin Xiaojie Zhang Zisheng Zhang Guihua Liu Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China College of Chemical Technology Shijiazhuang UniversityShijiazhuang 050035HebeiChina Department of Chemical and Biological Engineering University of OttawaOttawa KIN 6N5ONCanada

Lithium-sulfur(Li-S)batteries hold great promises to serve as next-generation energy storage devices because of their high theoretical energy density and environmental ***,the shuttle effect of the soluble lithium polysulfides(LiPS)and intrinsic insulating nature of sulfur lead to low sulfur utilization and coulombic efficiency,leading to poor cycling *** impeded charge transportation and retard LiPS catalytic conversion also endows the Li-S batteries with sluggish redox reaction,leading to unsatisfied rate *** this study,Co-based MOF material ZIF-67 is used as the precursor to prepare Co nano-dots decorated three-dimensional graphene aerogel as sulfur *** porous architecture establishes a highly conductive interconnected framework for fast charge/mass *** exposed Co nano-dots serve as active sites to strongly trap LiPS,which endows CoNDs@G with low decomposition energy barrier for fast LiPS conversion reaction and promote the completely Li2 S catalytic ***-S cells based on the Co-NDs@G cathode exhibits excellent cyclability and a high capacity retention rate of 91.1%in 100 *** strategy offers a new direction to design sulfur immobilizer for accelerated LiPS conversion kinetics of Li-S batteries.

关键词： Lithium-sulfur batteries Co nano-dots Graphene network Metal-organic framework High-loading cathodes

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Vertically stacked holey graphene/polyaniline heterostructures with enhanced energy storage for on-chip micro-supercapacitors

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Nano Research 2016年第4期9卷 1012-1021页

作者： Xiaocong Tian Bei Xiao Xu Xu lin Xu Zehua Liu zhaoyang Wang Mengyu Yan Qiulong Wei Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemistry and Biochemistry University of California Los Angeles California 90095 USA Department of Chemistry and Chemical Biology Harvard University Cambridge Massachusetts 02138 USA These authors contributed equally to this work.

Planar micro-supercapacitors （MSCs） have drawn extensive research attention owing to their unique structural design and size compatibility for microelectronic devices. Graphene has been widely used to improve the performance of microscale electrochemical capacitors. However, investigations of an intrinsic electrochemical mechanism for graphene-based microscale devices are still not sufficient. Here, micro-supercapacitors with various typical architectures are fabricated as models to study the graphene effect, and their electrochemical performance is also evaluated. The results show that ionic accessibility and adsorption are greatly improved after the introduction of the holey graphene intermediate layer. This study provides a new route to understand intrinsic electrochemical behaviors and possesses exciting potential for highly efficient on-chip micro-energy storage.

关键词： micro-supercapacitors holey graphene heterostructures ionic accessibility intrinsic electrochemical behaviors

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Genome-wide association study of callus induction variation to explore the callus formation mechanism of rice

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Journal of Integrative Plant Biology 2019年第11期61卷 1134-1150页

作者： zhaoyang Zhang Hu Zhao Wei Li Jiemin Wu Zaihui Zhou Fei Zhou Hao Chen Yongjun lin National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University

Rice(Oryza sativa) is one of the most widely cultivated food crops, worldwide. Tissue culture is extensively used in rice breeding and functional genome research. The ability to induce callus determines whether a particular rice variety can be subjected to tissue culture and Agrobacterium-mediated transformation. Over the past two decades, many quantitative trait loci(QTLs)related to callus induction traits have been identified;however, individual genes associated with rice callus induction have not been reported. In this study, we characterized three callus-induction traits in a global collection of 510 rice accessions. A genome-wide association study of the rice population in its entirety as well as subpopulations revealed 21 significant loci located in rice callus induction QTLs. We identified three candidate callus induction genes, namely CRL1, Os BMM1, and Os SET1, which Rese are orthologs of Arabidopsis LBD17/LBD29, BBM, and SWN,respectively, which are known to affect callus ***, we predicted that 14 candidate genes might be involved in rice callus induction and showed that RNA interference(RNAi)-mediated disruption of Os IAA10 inhibited callus formation on tissue culture *** growth in the Os IAA10 RNAi line was not inhibited by synthetic auxin(2,4-D) treatment, suggesting that Os IAA10 may perceive auxin and activate the expression of downstream genes, such as CRL1, to induce callus formation. The significant loci and candidate genes identified here may provide insight into the mechanism underlying callus formation in rice.

关键词： breeding crops

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Quantification of traffic-induced compaction based on soil and agricultural implement parameters

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International Journal of Agricultural and Biological Engineering 2020年第5期13卷 134-140页

作者： Xianliang Wang Xiangcai Zhang Xiaona lin Luming Sha Hanyu Yang zhaoyang Guo Zeyu Chen Rongyan Sun College of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255000ShandongChina

Vehicle-induced soil compaction occurs when agricultural machinery is working in the *** accumulated soil compaction could destroy soil structure and inhibit crop *** low degree of visualization of soil compaction has always been an important reason for restricting the development of compaction alleviation ***,the main objective of this study was to predict soil compaction based on soil and agricultural implement *** component of soil compaction prediction includes traffic-induced stress transmission evaluation and the quantitative relationship between soil stress and bulk *** modified FRIDA model was used to elucidate the soil stress propagation,which has been validated by previous *** Bailey formula was used to establish the intrinsic relationship between soil stress and bulk *** soil uniaxial compression test was applied to obtain the parameters of the Bailey formula,and soil samples were prepared with three different levels of water *** fitting with the Bailey formula,under the condition that the soil moisture contents were 16%,20%,and 24%,the fitting coefficients of soil bulk density were respectively 0.980,0.959,and 0.975,which were close to *** results indicated that the Bailey formula could be used to calculate soil bulk density based on the stress conditions of the *** verify the practicality of the soil compaction prediction model,a field experiment was carried out in Zhuozhou City,Hebei Province,*** treatment was set for 1,3,5,7,and 9 times compaction with two different loads of compaction *** results showed that the fit coefficient between the predicted and measured values of soil bulk density was greater than *** slope of the equation was greater than 0.782,proving that the soil bulk density prediction model based on agricultural implements and soil parameters has a good predictive effect on soil bulk *** soil compaction evaluation model can p

关键词： soil traffic-induced compaction agricultural implement soil bulk density no-tillage soil structure quantification

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面向动态交通流预测的双流图卷积网络

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计算机科学与探索 2022年第2期16卷 384-394页

作者：李朝阳李琳陶晓辉武汉理工大学计算机科学与技术学院武汉430070 南昆士兰大学理学院澳大利亚图文巴4350

准确的交通流预测能够为管理部门提供合理的决策依据,为驾驶员提供实时的道路状况预警,是交通领域至关重要的问题。近年来,相关研究利用图卷积神经网络(GCN)处理非欧式空间结构的特点,对来自复杂路网的交通流数据进行空间相关性建模。然... 详细信息

准确的交通流预测能够为管理部门提供合理的决策依据,为驾驶员提供实时的道路状况预警,是交通领域至关重要的问题。近年来,相关研究利用图卷积神经网络(GCN)处理非欧式空间结构的特点,对来自复杂路网的交通流数据进行空间相关性建模。然而,现有基于图卷积的交通流预测方法未能充分考虑空间相关性的有向性和动态性这两个重要特点。考虑到动态交通流呈现出由固定道路结构约束的稳定空间相关性和受交通环境变化影响的动态空间相关性,提出了一种用于动态交通流预测的端到端双流图卷积网络(TSGCN)。首先,将实时交通流数据分解为具有不同空间相关性的稳定分量和动态分量。其中,稳定分量表示受路网约束和交通习惯影响的部分,动态分量则代表因交通状况变化(如交通拥堵和恶劣天气)引起的波动。然后,通过双流图卷积层提取稳定和动态的空间相关性。最后,使用参数化跳过连接方法来融合时空相关性以获得最终的预测结果。在两个公开的真实交通数据集上的实验结果表明,提出的模型优于对比的交通流预测方法。

关键词：交通流预测图卷积神经网络(GCN) 时空相关性

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基于分层特征提取和多尺度特征融合的高分辨率遥感影像水体提取深度学习算法

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人民珠江 2024年第2期45卷 45-52页

作者：盛晟万芳琦林康聆胡朝阳陈华武汉大学水资源工程与调度全国重点实验室湖北武汉430072 江西省自然资源测绘与监测院江西南昌330009 福建省水利水电勘测设计研究院福建福州350001

高精度的水体提取有助于水资源监测和管理。目前基于遥感影像的水体提取方法缺乏对于边界质量的重视,造成边界划分不准确,细节保留度低的问题。为了提升遥感影像水体提取的边界与细节的精度,提出了一种基于多尺度特征融合的高分辨率遥... 详细信息

高精度的水体提取有助于水资源监测和管理。目前基于遥感影像的水体提取方法缺乏对于边界质量的重视,造成边界划分不准确,细节保留度低的问题。为了提升遥感影像水体提取的边界与细节的精度,提出了一种基于多尺度特征融合的高分辨率遥感影像水体提取深度学习算法,包括分层特征提取模块与融合多尺度特征的堆叠连接解码器模块。分层特征提取模块中,引入了通道注意力结构,用于整合高分辨率遥感影像中水体的形状、纹理和色调信息,以便更好地理解水体的形状和边界。在融合多尺度特征的堆叠连接解码器模块中,进行了多层次语义信息的堆叠连接,并加强了特征提取,同时捕捉了广泛的背景信息和细微的细节信息,以实现更好的水体提取效果。在自行标注的数据集与公开数据集上的试验结果表明,模型的准确率达到了98.37%和91.23%,与现有的语义分割模型相比,提取的水体边缘更加完整,同时保留细节的能力更强。提出的模型提升了水体提取的精度和泛化能力,为高分辨率遥感影像水体提取提供了参考。

关键词：水体提取高分辨率遥感影像深度学习多尺度特征融合

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改进Sage-Husa算法结合小波模糊阈值算法的MEMS陀螺去噪

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电子测量技术 2022年第19期45卷 64-69页

作者：于玉丹林伟俞朝阳上海应用技术大学电气与电子工程学院上海201418

为解决微机电系统(MEMS)中陀螺仪输出噪声大、精度低的问题,基于自适应滤波算法与小波阈值算法的基础上,将小波阈值算法与模糊理论结合,提出了Sage-Husa自适应滤波算法联合小波模糊阈值去噪算法应用在MEMS陀螺去噪中。首先使用改进的Sag... 详细信息

为解决微机电系统(MEMS)中陀螺仪输出噪声大、精度低的问题,基于自适应滤波算法与小波阈值算法的基础上,将小波阈值算法与模糊理论结合,提出了Sage-Husa自适应滤波算法联合小波模糊阈值去噪算法应用在MEMS陀螺去噪中。首先使用改进的Sage-Husa自适应滤波算法进行预处理,通过修正状态的预测值抑制干扰数据对滤波的影响,然后使用小波模糊阈值去噪算法对信号进行后处理,实现抑制随机噪声的效果。实验结果表明:在静态实验中,该算法去噪效果优于Sage-Husa自适应滤波算法和小波阈值算法,其与Sage-Husa自适应滤波算法、小波模糊阈值算法相比,噪声方差分别降低78.7%和14.6%,信噪比分别提高43.7%和16.3%。在动态实验中,该算法能够自适应地减少异常值的不利影响,保持原始信号的波形,其与Sage-Husa自适应滤波算法、小波模糊阈值算法相比,噪声方差分别降低62.7%和31.6%,信噪比分别提高47.8%和10.0%。

关键词：陀螺仪自适应滤波小波模糊滤波联合滤波

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CAS-ESM2.0 Model Datasets for the CMIP6 Flux-Anomaly-Forced Model Intercomparison Project (FAFMIP)

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Advances in Atmospheric Sciences 2021年第2期38卷 296-306页

作者： Jiangbo JIN He ZHANG Xiao DONG Hailong LIU Minghua ZHANG Xin GAO Juanxiong HE zhaoyang CHAI Qingcun ZENG Guangqing ZHOU Zhaohui lin Yi YU Pengfei lin Ruxu LIAN Yongqiang YU Mirong SONG Dongling ZHANG International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

The second version of the Chinese Academy of Sciences Earth System Model(CAS-ESM2.0)is participating in the Flux-Anomaly-Forced Model Intercomparison Project(FAFMIP)experiments in phase 6 of the Coupled Model Intercomparison Project(CMIP6).The purpose of FAFMIP is to understand and reduce the uncertainty of ocean climate changes in response to increased CO2 forcing in atmosphere-ocean general circulation models(AOGCMs),including the simulations of ocean heat content(OHC)change,ocean circulation change,and sea level rise due to thermal *** experiments(including faf-heat,faf-stress,faf-water,faf-all,faf-passiveheat,faf-heat-NA50pct and faf-heat-NA0pct)have been *** of the experiments were integrated over a 70-year period and the corresponding data have been uploaded to the Earth System Grid Federation data server for CMIP6 users to *** paper describes the experimental design and model datasets and evaluates the preliminary results of CAS-ESM2.0 simulations of ocean climate changes in the FAFMIP *** simulations of the changes in global ocean temperature,Atlantic Meridional Overturning Circulation(AMOC),OHC,and dynamic sea level(DSL),are all reasonably reproduced.

关键词： CAS-ESM2.0 CMIP6 FAFMIP AMOC ocean heat uptake dynamic sea level change

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考虑集电系统结构的山地风电场耦合谐振特性

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南方电网技术 2023年第3期17卷 136-145页

作者：林元睿李朝阳钟玄中国建筑西南设计研究院有限公司成都610097 西南交通大学电气工程学院成都611756 国网常德供电公司湖南常德415000

山地风电场限于地形、风能分布等因素,通常拥有复杂的集电结构、多样化的电气连接,导致风电场谐波建模繁琐、谐波谐振分析困难。为此基于实际山地风电场拓扑,将集电结构划分为3种类型,并建立传递函数模型,对山地风电场耦合谐振现象及发... 详细信息

山地风电场限于地形、风能分布等因素,通常拥有复杂的集电结构、多样化的电气连接,导致风电场谐波建模繁琐、谐波谐振分析困难。为此基于实际山地风电场拓扑,将集电结构划分为3种类型,并建立传递函数模型,对山地风电场耦合谐振现象及发生机理进行了系统的研究。首先,揭示了山地风电场中广泛存在着内部谐振、组内谐振、组外谐振和跨区域谐振,针对3种集电结构,在宽频域内区分了控制谐振带、滤波谐振带及叠加谐振带。对以上4种谐振中各谐振带引起的谐波放大进行分析,发现跨区域谐振中谐振频率带拓宽且趋向于高频。进一步考虑谐波传播路径变化,定义了谐波传导系数,揭示了耦合的谐波经过不同路径传播下的放大机理。最后,通过仿真验证了理论分析与模型的正确性。

关键词：山地风电场集电结构耦合谐振谐波放大

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横观各向同性岩体平直−光滑节理双模型细观参数联合标定方法

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中南大学学报（自然科学版） 2022年第6期53卷 2211-2223页

作者：王朝阳林鹏许振浩王文扬吴杰山东大学岩土与结构工程研究中心山东济南250061 山东大学土建与水利学院山东济南250061 山东大学齐鲁交通学院山东济南250061

为更真实地模拟节理岩体的力学行为,颗粒流程序(PFC)采用平直节理模型(FJM)和光滑节理模型(SJM)分别模拟横观各向同性岩体的岩石部分和节理部分。但双模型(FJM和SJM)标定涉及的细观参数多,导致宏观−细观参数对应关系复杂。为此,本文提... 详细信息

为更真实地模拟节理岩体的力学行为,颗粒流程序(PFC)采用平直节理模型(FJM)和光滑节理模型(SJM)分别模拟横观各向同性岩体的岩石部分和节理部分。但双模型(FJM和SJM)标定涉及的细观参数多,导致宏观−细观参数对应关系复杂。为此,本文提出一种横观各向同性岩体双模型细观参数联合标定方法。首先,遴选核心细观参数,建立岩体参数标定指标体系,对指标体系中的宏观−细观参数进行了敏感性分析,得到显著影响各宏观参数的细观参数;然后,提出FJM和SJM细观参数标定优先级体系,构建双模型细观参数联合分析方法,建立表征宏细观参数之间的函数关系;第三,为提高参数标定的准确性,提出了细观参数迭代校准方法;最后,形成了一套针对横观各向同性岩体的标准化细观参数标定流程。研究结果表明:所提标定方法可应用于页岩的细观参数标定,标定结果的相对误差小于3%,验证了该方法的有效性。

关键词：横观各向同性岩体颗粒流平直节理模型光滑节理模型标定方法迭代修正

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