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Acta Mechanica Solida Sinica 2021年第1期34卷 27-39页

作者： Qicong Li xiaoya tang Linli Zhu Haihui Ruan Department of Engineering Mechanics and Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang UniversityHangzhou310027China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

The thermal properties of a nanostructured semiconductor are affected by multi-physical fields,such as stress and electromagnetic fields,causing changes in temperature and strain *** this work,the influence of stress-dependent thermal conductivity on the heat transfer behavior of a GaN-based nanofilm is *** finite element method is adopted to simulate the temperature distribution in a prestressed nanofilm under heat *** results demonstrate the effect of stress field on the thermal conductivity of GaN-based nanofilm,namely,the prestress and the thermal stress lead to a change in the heat transfer behavior in the *** the same heat source,the peak temperature of the film with stress-dependent thermal conductivity is significantly lower than that of the film with a constant thermal conductivity and the maximum temperature difference can reach 8.2 *** results could be useful for designing GaN-based semiconductor devices with higher reliability under multi-physical fields.

关键词： Multi-physical effect Stress-dependent thermal conductivity Prestress fields Heat transfer behavior GaN-based nanofilm Finite element method

Characteristics of sedimentation and channel adjustment linked to the Three Gorges Reservoir

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International Journal of Sediment Research 2021年第2期36卷 177-189页

作者： xiaoya tang Sichen Tong Guoxian Huang Guangxiang Xu Xinghua Li Kun Lei Shiming Yao School of River and Ocean Engineering Chongqing Jiaotong University Chinese Research Academy of Environmental Sciences Key Laboratory of River Regulation and Control of Ministry of Water Resources Changjiang River Scientific Research Institute State Key Laboratory of Plateau Ecology and Agriculture Qinghai University

Construction of large dams is attractive because of their great benefits in flood control, hydropower generation, water resources utilization, navigation improvement, etc. However, dam construction may bring some negative impacts on sediment transport and channel dynamics adjustments. Due to the effects of recent water and soil conservation projects, sediment retention in the newly constructed large upstream reservoirs, and other factors, the sedimentation in the Three Gorges Reservoir(TGR) is quite different from the amount previously predicted in the demonstration stage. Consequently, based on the measured data, characteristics of sedimentation and the related channel deformation in the TGR were analyzed. The results imply that sediment transport tended to be reduced after the Three Gorges Project(TGP). Sedimentation slowed dramatically after 2013 and indicated obvious seasonal characteristics. Due to the rising water level in the TGR in the flood season, the yearly sediment export ratio(Eratio) was prone to decrease. The water level near the dam site should be reasonably regulated according to the flow discharge to improve the sediment delivery capacity and reduce sedimentation in the TGR, and to try to avoid situations where the flood retention time is close to 444 h. The depositional belt was discontinuous in the TGR and was mainly distributed in the broad reaches, and only slight erosion or deposition occurred in the gorge reaches. Sedimentation in the broad and gorge reaches accounted for 93.8% and6.2% of the total sedimentation, respectively. The estuarine reach located in the fluctuating backwater area experienced alternate erosion-deposition, with a slight accumulative deposition in the curved *** mainly occurred in the perennial backwater area. The insight gained in this study can be conducive to directly understanding of large reservoir sedimentation and mechanism of channel adjustment in the reservoir region in the main channel of large

关键词： Three Gorges Reservoir Sedimentation characteristics Channel adjustment Reduced sediment load

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基于非均匀流浅水效应的船舶操纵建模与仿真

系统仿真学报 2018年第3期30卷 866-872页

作者：童思陈唐小娅张欢重庆交通大学河海学院重庆400074 国家内河航道整治工程技术研究中心重庆400074

为更好体现和模拟山区河道的水流条件和船舶航行姿态,在明渠恒定非均匀水流模型基础上,开发了基于浅水效应的3自由度MMG船舶操纵运动数学模型。通过船舶定回转试验和Z型运动模拟结果表明,随着水深吃水比h/d的减小,船舶浅水效应越为突出... 详细信息

为更好体现和模拟山区河道的水流条件和船舶航行姿态,在明渠恒定非均匀水流模型基础上,开发了基于浅水效应的3自由度MMG船舶操纵运动数学模型。通过船舶定回转试验和Z型运动模拟结果表明,随着水深吃水比h/d的减小,船舶浅水效应越为突出,直航速度越小,定回转直径越大;同时,船舶Z型运动的摆幅越大,运动周期越长,说明船舶的舵效和操纵性能越差。结合工程实例分析表明,本文开发的基于非均匀流和浅水效应的船舶操纵运动数学模型可以应用于工程实际研究,山区河道的船舶操纵运动采用基于浅水效应的模型计算才更加合理和符合实际。

关键词：航道工程非均匀流浅水效应船舶操纵性船舶数学模型

The interactive effect of temperature and fertilizer types determines the dominant microbes in nitrous oxide emissions and the dicyandiamide efﬁcacy in a vegetable soil

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Soil Ecology Letters 2024年第3期6卷 121-133页

作者： xiaoya Xu Haiyang Liu Yaowei Liu Didier Lesueur Laetitia Herrmann Hongjie Di Caixian tang Jianming Xu Yong Li Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China College of Geography and Environment Shandong Normal UniversityJinan 250014China Centre de Coopération Internationale en Recherche Agronomique pour le Développement(CIRAD) UMR Eco&SolsHanoiVietnam Eco&Sols Universitéde Montpellier(UMR)CIRADInstitut National de Recherche pour l’Agriculturel’Alimentation et l’Environnement(INRAE)Institut de Recherche pour le Développement(IRD)Montpellier SupAgro34060 MontpellierFrance Alliance of Biodiversity International and International Center for Tropical Agriculture(CIAT) Asia hubCommon Microbial Biotechnology Platform(CMBP)HanoiVietnam School of Life and Environmental Sciences Faculty of ScienceEngineering and Built Environment–Deakin UniversityMelbourneVIC 3125Australia Rubber Research Institute Chinese Academy of Tropical Agricultural SciencesHaikou 571737China La Trobe Institute for Sustainable Agriculture and Food Department of AnimalPlant&Soil SciencesLa Trobe UniversityBundooraVic 3086Australia

Heat waves associated with global warming and extreme climates would arouse serious consequences on nitrogen(N)***,the responses of the functional guilds to different temperatures,especially high temperature and the cascading effect on N_(2)O emissions remain *** incubation study was conducted to examine the effect of different temperatures(20°C,30°C,and 40°C)and fertilizer types(urea and manure)on N_(2)O-producers and N_(2)O-reducers,as well as the efficacy of dicyandiamide(DCD)on N_(2)O emissions in a vegetable *** showed that ammonia oxidizers and nirS-type denitrifiers were well adapted to high temperature(40°C)with manure application,while the fungal nirK-denitrifiers had better tolerance with urea *** nosZ clade I microbes had a strong adaptability to various temperatures regardless of fertilization type,while the growth of nosZ clade II group microbes in non-fertilized soil(control)were significantly inhibited at higher *** N_(2)O emissions were significantly decreased with increasing temperature and DCD application(up to 60%,even at 40°C).Under high temperature conditions,fungal denitrifiers play a significant role in N-limited soils(non-fertilized)while nirS-type denitrifiers was more important in fertilized soils in N_(2)O emissions,which should be specially targeted when mitigating N_(2)O emissions under global warming climate.

关键词： nitrogen fertilizer microorganisms nitrification inhibitor bacteria archaea fungi

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基于sEMG的连续膝关节角度预测方法

计算机应用与软件 2023年第11期40卷 335-340页

作者：唐晓娅陈峰南通大学电气工程学院江苏南通226019

建立表面肌电信号(surface electromyography,sEMG)和关节运动量的映射模型,对康复机器人的连续运动过程控制具有重要意义。为提高预测模型的准确性和适用性,基于肌肉协调理论,采用特征提取和主成分分析提取肌肉激活度,提出遗传算法(GA... 详细信息

建立表面肌电信号(surface electromyography,sEMG)和关节运动量的映射模型,对康复机器人的连续运动过程控制具有重要意义。为提高预测模型的准确性和适用性,基于肌肉协调理论,采用特征提取和主成分分析提取肌肉激活度,提出遗传算法(GA)优化的支持向量回归算法(Support Vector Regression,SVR)构建肌肉激活度和膝关节角度之间的映射模型,并对健康受试者和膝关节损伤患者在不同运动状态下的sEMG进行膝关节角度预测。GA-SVR算法预测结果的均方根误差分别为1.94°和2.44°,远优于BP神经网络的18.21°和18.28°。结果表明,GA-SVR具有较高的预测精度和较强的通用性。

关键词：表面肌电信号连续运动预测特征提取膝关节肌肉激活度

Cauliflower-like Ni_(3)S_(2) foam for ultrastable oxygen evolution electrocatalysis in alkaline seawater

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Nano Research 2024年第8期17卷 6820-6825页

作者： Qiuying Dai Xun He Yongchao Yao Kai Dong Xuwei Liu Xiankun Guo Jie Chen xiaoya Fan Dongdong Zheng Yongsong Luo Shengjun Sun Luming Li Wei Chu Asmaa Farouk Mohamed SHamdy Xuping Sun Bo tang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute for Advanced Study Chengdu UniversityChengdu 610106China Department of Chemistry College of ScienceKing Khalid UniversityP.O.Box 900461413 AbhaSaudi Arabia Center for High Altitude Medicine West China HospitalSichuan UniversityChengdu 610041China Laoshan Laboratory Qingdao 266237China

It is of great importance to design and develop electrocatalysts that are both long-lasting and efficient for seawater ***,a three-dimensional porous cauliflower-like Ni_(3)S_(2) foam on Ni foam(Ni_(3)S_(2) foam/NF)is proposed as a high-performance electrocatalyst for the oxygen evolution reaction in alkaline *** as-synthesis Ni_(3)S_(2) foam/NF achieves exceptional efficacy,achieving a current density of 100 mA·cm^(−2)at mere overpotential of 369 ***,its electrocatalytic stability extends up to 1000 h at 500 mA·cm^(−2).

关键词： Ni_(3)S_(2)foam oxygen evolution reaction seawater electrolysis electrocatalyst

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三峡水库汛期泥沙淤积对坝前水位的滞后响应

水科学进展 2019年第4期30卷 528-536页

作者：唐小娅童思陈许光祥黄国鲜王涛重庆交通大学河海学院重庆400074 国家内河航道整治工程技术研究中心重庆400074 中国环境科学研究院北京100012 长江重庆航运工程勘察设计院重庆401147

河床演变中普遍存在着滞后现象,而以往的三峡水库泥沙研究对滞后现象鲜有考虑。为深入认识三峡水库运行带来的泥沙淤积特征,建立了考虑上游来沙和坝前水位双重影响的泥沙淤积滞后响应模型。基于2003—2017年实测水沙资料,分析了三峡入... 详细信息

河床演变中普遍存在着滞后现象,而以往的三峡水库泥沙研究对滞后现象鲜有考虑。为深入认识三峡水库运行带来的泥沙淤积特征,建立了考虑上游来沙和坝前水位双重影响的泥沙淤积滞后响应模型。基于2003—2017年实测水沙资料,分析了三峡入库水沙特性及汛期泥沙淤积特点,利用滞后响应模型探究了汛期泥沙淤积的滞后规律。结果表明:2003—2012年入库水沙呈现“大水带大沙,少水带少沙”的特点,汛期淤积随坝前水位抬升而增加;2013—2017年入库水沙关系的一致性发生变化,受上游梯级库群拦沙影响,汛期淤积减缓。三峡水库汛期累计淤积与5年线性叠加坝前水位之间有较好的相关关系,汛期淤积不仅与当年来沙和坝前水位运行有关,也与前4年的来沙和坝前水位调度有关。

关键词：泥沙淤积滞后响应叠加坝前水位三峡水库

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研究生学术不端现象及其诚信教育

中南大学学报（医学版） 2011年第10期36卷 1021-1024页

作者：毕晓艳唐小亚范学工中南大学公共卫生学院长沙410078 中南大学肿瘤研究所长沙410078

目前抄袭、剽窃、伪造或者篡改实验数据等学术不端行为层出不穷。之所以出现上述现象,是社会环境外部因素、高校研究生培养体制内部因素和研究生自身道德因素相互作用的结果。因此,高校应注重营造健康诚信的校园环境和宽容失败的学术氛... 详细信息

目前抄袭、剽窃、伪造或者篡改实验数据等学术不端行为层出不穷。之所以出现上述现象,是社会环境外部因素、高校研究生培养体制内部因素和研究生自身道德因素相互作用的结果。因此,高校应注重营造健康诚信的校园环境和宽容失败的学术氛围,充分运用现代高科技手段的辅助作用,健全学术诚信,完善监督和评价机制,加大惩戒力度,加强导师的育人和表率作用,培养出具有尊重科学、实事求是和品学兼优的创新型人才。

关键词：研究生学术不端现象诚信教育

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利用埋管水压渗透恢复水库滩库容试验研究

人民长江 2016年第17期47卷 84-87,113页

作者：唐小娅童思陈杨明哲重庆交通大学河海学院重庆400074

水库滩库容损失后极难恢复,探寻有效的滩库容恢复途径十分必要。基于概化水库的滩库容恢复实验,采用埋管水压渗透方法,在水下淤积物底层预埋槽孔管,促使泥沙加压液化,最终在管道上方形成顺管道线的三角形输沙横断面。试验结果表明,压力... 详细信息

水库滩库容损失后极难恢复,探寻有效的滩库容恢复途径十分必要。基于概化水库的滩库容恢复实验,采用埋管水压渗透方法,在水下淤积物底层预埋槽孔管,促使泥沙加压液化,最终在管道上方形成顺管道线的三角形输沙横断面。试验结果表明,压力水流进入上下开孔的槽孔管后,边滩泥沙整体向上起动,而后向主槽移动,清淤效果较为明显;压力水流进入左右开孔的槽孔管后,靠近主槽的边坡泥沙最先落回,而后边坡逐渐崩坍并向高滩蔓延,输沙断面慢慢扩大,从而达到滩库容恢复的目的。

关键词：埋管水压渗透加压液化水槽试验库容恢复

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图像处理技术在泥沙粒径分析中的应用

水利水电技术 2017年第6期48卷 85-90页

作者：唐小娅童思陈王亮郭荣重庆交通大学国家内河航道整治工程技术研究中心重庆400074 北京城建设计发展集团股份有限公司广西南宁530028 天津普泽工程咨询有限责任公司天津300201

基于数字图像处理技术的泥沙粒径分析是近年发展起来的一种新方法。传统分水岭分割方法直接作用于梯度图像,受图像噪声、目标的细小边缘及纹理等因素影响,测量精度会相对降低。通过标记重构和区域合并对传统分水岭分割法进行优化,提出... 详细信息

基于数字图像处理技术的泥沙粒径分析是近年发展起来的一种新方法。传统分水岭分割方法直接作用于梯度图像,受图像噪声、目标的细小边缘及纹理等因素影响,测量精度会相对降低。通过标记重构和区域合并对传统分水岭分割法进行优化,提出改进算法。基于实测数据,围绕数字图像处理相关技术,借鉴其他领域图像分析设备和方法,以数码单反相机和Image J2x图像处理软件为基础,建立一套泥沙图像粒径分析系统。采用图像法、机械筛分法和激光分析法分别对同一批沙样进行粒径测定。对测定结果进行的分析表明数字图像处理技术可较好地用于泥沙粒径分析。

关键词：数字图像处理泥沙粒径分析粘连颗粒