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Novel tracking method for the drinking behavior trajectory of pigs

International Journal of Agricultural and Biological Engineering 2023年第6期16卷 67-76页

作者： Chengqi Liu Haijian Ye longhe wang Shuhan Lu Lin Li College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China National Research Facility for Phenotypic and Genotypic Analysis of Model Animals Beijing 100083China School of Information University of MichiganAnn Arbor 48103USA

Identifying and tracking the drinking behavior of pigs is of great significance for welfare feeding and piggery management. Research on pigs’ drinking behavior not only needs to indicate whether the snout is in contact with the water fountain, but it also needs to establish whether the pig is drinking water and for how long. To solve target loss and identification errors, a novel method for tracking the drinking behavior of pigs based on L-K Pyramid Optical Flow (L-K OPT), Kernelized Correlation Filters (KCF), and DeepLabCut (DLC) was proposed. First, the feature model of the drinking behavior of a sow was established by L-K OPT. In addition, the water flow vector was used to determine whether the animal drank water and to demonstrate the details of the movements. Then, on the basis of the improved KCF, the relocation model of the sow’s snout was established to resolve the problem of tracking loss in the snout. Finally, the tracking model of piglets’ drinking behavior was established by DLC to build the mapping association between the pig’s snout and the drinking fountain. By using 200 episodes of drinking water videos (30-60 s each) to verify the method proposed in this study, the results are explained that 1) according to the two important drinking water indexes, the Down (−135°, −45°) direction feature and the V2 (>10 pixels) speed feature, the drinking time could be accurate to the frame level, with an error within 30 frames;2) The overlapping precision (OP) was 95%, the center location error (CLE) was 3 pixels, and the speed was 300 fps, which were all superior to other traditional algorithms;3) The optimal learning rate was 0.005, and the loss value was 0.0 002. The method proposed in this study realized accurate and automatic monitoring of the drinking behavior of pigs, which could provide reference for other animal behavior monitoring.

关键词： tracking method drinking behavior trajectory pigs L-K optical flow KCF DeepLabCut

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Skeleton extraction and pose estimation of piglets using ZS-DLC-PAF

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International Journal of Agricultural and Biological Engineering 2023年第3期16卷 180-193,F0004页

作者： Chengqi Liu Haijian Ye Shuhan Lu Zhan Tang Zhao Bai Lei Diao longhe wang Lin Li College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China School of Information University of MichiganAnn Arbor 48109USA National Research Facility for Phenotypic and Genotypic Analysis of Model Animals(Beijing) Beijing 100083China

The accurate identification of various postures in the daily life of piglets that are directly reflected by their skeleton morphology is necessary to study the behavioral characteristics of ***,this study proposed a novel approach for the skeleton extraction and pose estimation of ***,an improved Zhang-Suen(ZS)thinning algorithm based on morphology was used to establish the chain code mechanism of the burr and the redundant information deletion templates to achieve a single-pixel width extraction of pig ***,body nodes were extracted on the basis of the improved DeepLabCut(DLC)algorithm,and a part affinity field(PAF)was added to realize the connection of body nodes,and consequently,construct a database of pig behavior and ***,a support vector machine was used for pose matching to recognize the main behavior of *** this study,14000 images of piglets with different types of behavior were used in posture recognition *** showed that the improved algorithm based on ZS-DLC-PAF achieved the best thinning rate compared with those of distance transformation,medial axis transformation,morphology refinement,and the traditional ZS *** node tracking accuracy reached 85.08%,and the pressure test could accurately detect up to 35 nodes of 5 *** average accuracy of posture matching was 89.60%.This study not only realized the single-pixel extraction of piglets’skeletons but also the connection among the different behavior body nodes of individual sows and multiple ***,this study established a database of pig posture behavior,which provides a reference for studying animal behavior identification and classification and anomaly detection.

关键词： piglets skeleton extraction pose estimation Zhang-Suen DeepLabCut Part affinity field

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Seismic performance and resilience of composite damping self-centering braced frame structures

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Fundamental Research 2024年第3期4卷 603-610页

作者： longhe Xu Xingsi Xie Zhongxian Li School of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China Key Laboratory of Coast Civil Structure Safety of China Ministry of Education Tianjin UniversityTianjin 300072China

A magnetorheological self-centering brace(MR–SCB)has been proposed to improve the energy dissipation capability of the *** this paper,a 15-story MR–SCB braced frame is numerically analyzed to examine its seismic performance and *** MR–SCB provides higher lateral stiffness than the buckling restrained brace and greater energy dissipation capability than the existing self-centering *** brace also exhibits a reliable recentering *** rare earthquakes,the maximum average residual deformation ratio of the structure is less than the 0.5%*** mega earthquakes,the maximum average interstory drift ratio of the structure does not exceed the 2.0%elastoplastic limit,and its maximum average floor acceleration ratio is *** effects of mainshock and aftershock on the structural behavior are also *** interstory drift and residual deformation of the structure increase with the increase of the intensity of the *** aftershocks with the same intensity as the mainshocks,the maximum increment of the residual deformation ratio of the structure is 81.8%,and the average interstory drift ratios of the 12^(th),7^(th),and 3^(rd)stories of the structure are increased by 13.4%,9.2%and 7.5%,*** strong aftershock may significantly cause increased damage to the structure,and increase its collapse risk and residual deformation.

关键词： Braced frame structure Self-centeringbrace Magnetorheological fluid Disc spring Seismic performance Seismic resilience Mainshock-aftershock

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Vehicle-to-Infrastructure Channel Characterization in Urban Environment at 28 GHz

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China Communications 2019年第2期16卷 36-48页

作者： longhe wang Bo Ai Danping He Ke Guan Jiayi Zhang Junhyeong Kim Zhangdui Zhong State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications Future Mobile Communication Research Division Electronics and Telecommunications Research Institute School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST)

Both ultra-reliable low latency and high-data-rate communications are required by connective vehicles. Millimeter wave(mm Wave) with large bandwidth is a key technology to support high-data-rate communications. In this paper, the 28 GHz wideband vehicle-to-infrastructure channel is characterized for the urban environment in a major street in Manhattan. The deployment of the transmitter and the receiver, as well as the traffic models, are selected by considering the recommendation by 3GPP TR 37.885. Ray tracing simulator with calibrated electromagnetic parameters is employed in this work to practically conduct intensive simulations. The 3D environment model is reconstructed from OpenStreetMap. The power delay profile, path loss, root-meansquare delay spread, K-factor and so on, are extracted from the calibrated simulation results. The evolution of the parameters, as well as their statistical properties, are analyzed and modeled. The work of this paper helps the researchers understand the propagation channel for designing mmWave technologies and communication system in a similar scenario.

关键词： channel characterization mmWave channel ray tracing urban environment vehicular communication

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Magnetic, dielectric and luminescence synergetic switchable effects in molecular material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)]

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Chinese Chemical Letters 2024年第4期35卷 502-505页

作者： Yan Cheng Hua-Peng Ruan Yan Peng longhe Li Zhenqiang Xie Lang Liu Shiyong Zhang Hengyun Ye Zhao-Bo Hu Chaotic Matter Science Research Center Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China College of Materials and Chemical Engineering Pingxiang UniversityPingxiang 337055China Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Jiangxi University for Functional Materials Chemistry School of Chemistry and Chemical EngineeringGannan Normal UniversityGanzhou 341000China

The application of multifunctional materials in various fields such as electronics and signal processors has attracted massive attention. Herein, a new organic-inorganic hybrid material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)](1) is reported, which contains two organic amines cations and one [MnBr_(4)] tetrahedral ion. Compound 1 has a dielectric anomaly signal at 338 K, which proves its thermodynamic phase transition. The single crystal measurements at 200 K and 380 K show that the phase transition of compound 1 is caused by the thermal vibration of organic amine cations in the lattice. Moreover, compound 1 shows yellow-green luminescence under UV light irradiation. The magnetism measurements indicate that compound 1 shows switchable magnetic properties. This organic–inorganic material is a multifunctional material with dielectric, optical, and magnetic synergetic switchable effects, which expands a new direction for designing multifunctional materials.

关键词： Synergetic switchable effects Molecular materials Magnetism Dielectric Luminescence

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社会本位视角下之近代中国所得税立法——《所得税发达史》述论

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政法论坛 2024年第2期42卷 166-177页

作者：韩龙河厦门大学法学院

近代学者朱偰在《所得税发达史》一书中系统梳理了所得税的发展过程和三种主要立法模式,将其置于法本位的历史发展框架中,可发觉所得税本身即具有社会本位属性,并随着法的权利本位向社会本位转换而风靡全球。近代中国引介所得税除了补... 详细信息

近代学者朱偰在《所得税发达史》一书中系统梳理了所得税的发展过程和三种主要立法模式,将其置于法本位的历史发展框架中,可发觉所得税本身即具有社会本位属性,并随着法的权利本位向社会本位转换而风靡全球。近代中国引介所得税除了补充财政和税制革新之目的外,还有社会本位层面之动因,具体包括传统中国整体主义价值观之赓续、20世纪初西方社会本位法律学说之影响、近代中国经济发展不平衡所导致的社会不公问题之凸显。社会本位动因的存在决定了所得税在近代中国之发展不能脱离其社会本位属性,但囿于经济环境和战争压力,近代中国所得税的多次立法尝试在税权表达和规范建构上均存在相应的社会本位问题。以史为鉴,当代中国所得税的社会本位立法应注意在基本税权表达和具体规范建构层面进一步解决收入分配差距较大问题和保证所得税之公平性。

关键词：社会本位整体主义所得税立法《所得税发达史》

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基于深度学习的PPI关系抽取方法研究进展

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计算机应用与软件 2023年第5期40卷 1-9页

作者：唐詹王龙鹤郭旭超周晗刁磊李林中国农业大学信息与电气工程学院北京100085

蛋白质间相互作用(protein-protein interaction,PPI)在几乎全部的生命活动中发挥着极其重要的作用,如何准确、高效地自动化抽取出科学文献中的PPI关系有着十分重要的研究意义。深度学习作为机器学习的一个重要分支,由于其强大的学习能... 详细信息

蛋白质间相互作用(protein-protein interaction,PPI)在几乎全部的生命活动中发挥着极其重要的作用,如何准确、高效地自动化抽取出科学文献中的PPI关系有着十分重要的研究意义。深度学习作为机器学习的一个重要分支,由于其强大的学习能力和特征提取能力,在PPI关系抽取领域得到了广大研究者的关注。对现有基于深度学习的PPI关系抽取方法进行阐述,对这些方法的实验数据及其构成组件进行对比分析,总结这些方法存在的问题,展望可以改进的研究方向。

关键词：蛋白质间相互作用关系抽取深度学习自然语言处理

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卫星互联网资源管控技术研究

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中国工程科学 2023年第6期25卷 27-38页

作者：王龙河周一青曹欢刘子凡陈岩陈道进石晶林中国科学院计算技术研究所北京100190 处理器芯片全国重点实验室北京100190 移动计算与新型终端北京市重点实验室北京100190 中国科学院大学计算机科学与技术学院北京100049

卫星互联网支持全球无缝覆盖,是地面通信系统的重要扩展和延伸、构建“空天地”一体化网络的关键环节、实现网络强国的重要基础信息设施;发展卫星互联网战略意义重大,相应的资源管控研究较为迫切。本文阐述了卫星互联网的基本概念及国... 详细信息

卫星互联网支持全球无缝覆盖,是地面通信系统的重要扩展和延伸、构建“空天地”一体化网络的关键环节、实现网络强国的重要基础信息设施;发展卫星互联网战略意义重大,相应的资源管控研究较为迫切。本文阐述了卫星互联网的基本概念及国际发展前沿、卫星互联网资源管控的基本要素与研究进展,辨识了以卫星互联网新环境、新模式为代表的卫星互联网资源管控发展挑战,形成了相应的应对策略。设计了卫星互联网资源管控技术路线,涵盖星地网络互联互通、星地异构资源融合、智能按需服务、智慧内生等主要阶段;论证提出了卫星互联网资源管控模式与架构,构建了包括高时空动态资源表征、多维资源时间连续确定性分析、多维时变能力池索引、智能决策规划在内的卫星网络资源管控关键技术体系。研究建议,重点关注资源异质异构、网络结构动态变化、服务需求差异化的网络特征,按照优化的技术路线循序渐进发展,突破卫星网络资源管控关键技术并融合人工智能技术,从而实现智能高效的卫星网络资源管控。

关键词：卫星互联网资源管控空天地一体化网络动态资源表征智能规划决策

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自复位复合阻尼耗能支撑滞回性能研究

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振动与冲击 2024年第14期43卷 29-36页

作者：徐龙河杨智博谢行思北京交通大学土木建筑工程学院北京100044

为解决自复位支撑耗能能力不足且来源单一、耗能材料成本高昂的问题,提出了一种新型自复位复合阻尼耗能支撑。支撑由金属屈服阻尼装置、黏弹阻尼装置并联预压碟簧自复位装置组成。对其基本构造和工作原理进行阐述,通过精细化模拟研究了... 详细信息

为解决自复位支撑耗能能力不足且来源单一、耗能材料成本高昂的问题,提出了一种新型自复位复合阻尼耗能支撑。支撑由金属屈服阻尼装置、黏弹阻尼装置并联预压碟簧自复位装置组成。对其基本构造和工作原理进行阐述,通过精细化模拟研究了支撑的耗能、复位、承载和变形能力。结果表明,在往复荷载作用下,支撑的滞回响应具有稳定饱满的旗形特征,拉压对称、无残余变形,能够兼顾不同加载频率下的性能需求。揭示了支撑加载制度和设计参数对其滞回性能的影响规律,结果表明:加载频率从0.3 Hz增加到2.0 Hz,黏弹阻尼装置提供的阻尼力增大,支撑耗能量由8.32 kJ增加到11.93 kJ;随着碟簧预压力的增加,支撑激活力从378.98 kN增加到562.67 kN,复位性能始终得到充分发挥;支撑耗能能力主要受三角形钢板个数和黏弹材料剪切面面积影响,增加4个三角形钢板或将黏弹材料剪切面面积从140 mm×140 mm增加到300 mm×140 mm,支撑的等效黏滞阻尼比分别同比增长39.93%和16.09%。

关键词：自复位支撑黏弹阻尼金属屈服阻尼碟形弹簧滞回性能残余变形

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D式造口旁修补术在永久性乙状结肠造口后造口旁疝中的应用

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中华胃肠外科杂志 2024年第6期27卷 621-624页

作者：伏亚彦周家杰张宸恺孙龙和王伟任俊汪刘华汤东马悦王道荣扬州大学附属苏北人民医院胃肠外科、江苏省苏北人民医院胃肠外科、南京大学医学院临床教学医院苏北医院胃肠外科扬州225001 扬州大学-扬州市普通外科研究所、扬州市消化病代谢病基础与临床转化重点实验室扬州225001 扬州大学医学院医疗系扬州225001

目的评估腹腔镜造口旁疝修补联合腹壁及腹膜外造口重建——“D式造口旁疝修补术”在永久性乙状结肠造口后造口旁疝中的可行性。方法采用回顾性观察性研究的方法,纳入疝脱出物还纳困难、有发生急性嵌顿和绞窄性肠梗阻危险以及严重影响患... 详细信息

目的评估腹腔镜造口旁疝修补联合腹壁及腹膜外造口重建——“D式造口旁疝修补术”在永久性乙状结肠造口后造口旁疝中的可行性。方法采用回顾性观察性研究的方法,纳入疝脱出物还纳困难、有发生急性嵌顿和绞窄性肠梗阻危险以及严重影响患者的美观和生活质量、严重影响造口护理的患者。排除随访期内肿瘤复发和(或)新发以及失访者。回顾性分析2020年6月至2022年8月江苏省苏北人民医院连续收治的25例永久性乙状结肠造口后造口旁疝患者的临床资料,其中男性9例,女性16例,年龄(66.7±8.6)岁。D式造口旁疝修补术操作步骤:腹腔镜下回纳疝内容物,清除疝囊并在保护系膜血管弓的情况下游离脾区肠管;原造口开腹下操作,松懈肠管并清除腹腔镜下无法操作的疝囊组织;于原造口外上行腹膜外造口;关闭原造口。观察患者术中、术后及随访情况。结果全组25例患者均顺利完成手术,无术中严重并发症的发生,手术时间为(128.4±32.3)min,术中失血量(58.0±13.6)ml,术后首次肛门排气时间(21.8±4.7)h。术后住院时间(7±2)d,住院费用(2.4±0.2)万元。术后共出现3例(12.0%)短期并发症:其中切口感染、造口回缩和缺血各1例。6例(24.0%)发生长期并发症,其中术后慢性疼痛5例(20.0%),部分肠梗阻1例(4.0%),均经保守治疗后改善。结论D式造口旁疝修补术用于造口旁疝修补联合腹壁及腹膜外造口重建安全可行。

关键词：肠造口术 D式造口旁疝修补术造口重建

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