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Cow-YOLO:Automatic cow mounting detection based on non-local CSPDarknet53 and multiscale neck

International Journal of Agricultural and Biological Engineering 2024年第3期17卷 193-202页

作者： De Li Junhao Wang Zhe Zhang Baisheng Dai Kaix.an Zhao Weizheng Shen Yanling Yin yang Li College of Electrical Engineering and Information Northeast Agricultural UniversityHarbin 150030China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471023HenanChina College of Animal Sciences and Technology Northeast Agriculture UniversityHarbin 150030China Key Laboratory of Northeast Smart Agricultural Technology of Ministry of Agriculture and Rural Affairs Northeast Agricultural UniversityHarbin 150030China

Cows mounting behavior is a significant manifestation of estrus in *** timely detection of cows mounting behavior can make cows conceive in time,thereby improving milk production of cows and economic benefits of the *** methods of mounting behavior detection are difficult to achieve precise detection under occlusion and severe scale change environments and meet real-time ***,this study proposed a Cow-YOLO model to detect cows mounting *** meet the needs of real-time performance,YOLOv5s model is used as the baseline *** order to solve the problem of difficult detection of cows mounting behavior in an occluded environment,the CSPDarknet53 of YOLOv5s is replaced with Non-local CSPDarknet53,which enables the network to obtain global information and improves the model’s ability to detect the mounting ***,the neck of YOLOv5s is redesigned to Multiscale Neck,reinforcing the multi-scale feature fusion capability of model to solve difficulty detection under dramatic scale ***,to further increase the detection accuracy,the Coordinate Attention Head is integrated into ***,these improvements form a novel cow mounting detection model called Cow-YOLO and make Cow-YOLO more suitable for cows mounting behavior detection in occluded and drastic scale changes ***-YOLO achieved a precision of 99.7%,a recall of 99.5%,a mean average precision of 99.5%,and a detection speed of 156.3 f/s on the test *** with ex.sting detection methods of cows mounting behavior,Cow-YOLO achieved higher detection accuracy and faster detection speed in an occluded and drastic scale-change ***-YOLO can assist ranch breeders in achieving real-time monitoring of cows estrus,enhancing ranch economic efficiency.

关键词： cows mounting automatic detection Cow-YOLO computer vision CSPDarknet53 multiscale neck

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Asymmetric frequency multiplex.ng topological devices based on a floating edge band

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Photonics Research 2024年第6期12卷 1201-1212页

作者： JIAJUN MA CHUNMEI OUyang YUTING yang DONGyang WANG HONGYI LI LI NIU YI LIU QUAN x. YANFENG LI ZHEN TIAN JIAGUANG HAN WEILI ZHANG Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering and Key Laboratory of Optoelectronics Information and TechnologyTianjin UniversityTianjin 300072China School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Guangx. Key Laboratory of Optoelectronic Information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin 541004China School of Electrical and Computer Engineering Oklahoma State UniversityStillwaterOklahoma 74078USA

Topological photonics provides a platform for robust energy transport regardless of sharp corners and ***,the frequency multiplex.ng topological devices have attracted much attention due to the ability to separate optical signals by wavelength and hence the potential application in optical communication *** frequency multiplex.ng topological devices are generally based on the slow light ***,the resulting static local spatial mode or finely tuned flat band has zero-group velocity,making it difficult for both ex.erimental ex.itation and channel ***,we propose and ex.erimentally demonstrate an alternative prototype of asymmetric frequency multiplex.ng devices including a topological rainbow and frequency router based on floating topological edge mode(instead of localized ones);hence the multiple wavelength channels can be collectively ex.ited with a point source and efficiently routed to separate output *** channel separation in our design is achieved by gradually tuning the band gap truncation on a topological edge band over a wide range of frequencies.A crucial feature lies in that the topological edge band is detached from bulk states and floating within the upper and lower photonic band *** interestingly,due to the sandwiched morphology of the edge band,the top and bottom band gaps will each truncate into transport channels that support topological propagation towards opposite directions,and the asymmetrical transportation is realized for the frequency multiplex.ng topological devices.

关键词： tuning floating hence

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基于边界点估计与稀疏卷积神经网络的三维点云语义分割

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浙江大学学报（工学版） 2024年第6期58卷 1121-1132页

作者：杨军张琛兰州交通大学电子与信息工程学院甘肃兰州730070 兰州交通大学测绘与地理信息学院甘肃兰州730070

针对大规模点云具有稀疏性,传统点云方法提取上下文语义特征不够丰富,并且语义分割结果存在物体边界模糊的问题,提出基于边界点估计与稀疏卷积神经网络的三维点云语义分割算法,主要包括体素分支与点分支.对于体素分支,将原始点云进行体... 详细信息

针对大规模点云具有稀疏性,传统点云方法提取上下文语义特征不够丰富,并且语义分割结果存在物体边界模糊的问题,提出基于边界点估计与稀疏卷积神经网络的三维点云语义分割算法,主要包括体素分支与点分支.对于体素分支,将原始点云进行体素化后经过稀疏卷积得到上下文语义特征;进行解体素化得到每个点的初始语义标签;将初始语义标签输入到边界点估计模块中得到可能的边界点.对于点分支,使用改进的动态图卷积模块提取点云局部几何特征;依次经过空间注意力模块与通道注意力模块增强局部特征;将点分支得到的局部几何特征与体素分支得到的上下文特征融合,增强点云特征的丰富性.本算法在S3DIS数据集和SemanticKITTI数据集上的语义分割精度分别达到69.5%和62.7%.实验结果表明,本研究算法能够提取到更丰富的点云特征,可以对物体的边界区域进行准确分割,具有较好的三维点云语义分割能力.

关键词：点云数据语义分割注意力机制稀疏卷积体素化

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Comparison of prognosis and postoperative morbidities between standard pancreaticoduodenectomy and the TRIANGLE technique for resectable pancreatic ductal adenocarcinoma

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 689-699页

作者： He-x.ng Hang Zheng-Hua Cai Yi-Fei yang x. Fu Yu-Dong Qiu Hao Cheng Division of Pancreatic Surgery Department of General SurgeryNanjing Drum Tower HospitalThe Affiliated Hospital of Medical SchoolNanjing UniversityNanjing 210008Jiangsu ProvinceChina

BACKGROUND Radical surgery combined with systemic chemotherapy offers the possibility of long-term survival or even cure for patients with pancreatic ductal adenocar-cinoma(PDAC),although tumor recurrence,especially locally,still inhibits the treatment *** TRIANGLE technique was introduced as an ex.ended dissection procedure to improve the R0 resection rate of borderline resectable or locally advanced ***,there was a lack of studies concerning postoperative complications and long-term outcomes of this procedure on patients with resectable *** Patients with resectable PDAC eligible for PD from our hospital between June 2018 and December 2021 were enrolled in this retrospective cohort *** the patients were divided into PDstandard and PDTRIANGLE groups according to the surgical *** characteristics,surgical data,and postoperative morbidities were *** of the patients were followed up,and the date and location of tumor recurrence,and death were *** Kaplan-Meier method and log-rank test were used for the survival *** There were 93 patients included in the study and 37 underwent the TRIANGLE *** of operation was longer in the PDTRIANGLE group compared with the PDstandard group[440(410-480)min vs 320(265-427)min](P=0.001).Intraoperative blood loss[700(500-1200)mL vs 500(300-800)mL](P=0.009)and blood transfusion[975(0-1250)mL vs 400(0-800)mL](P=0.009)were higher in the PDTRIANGLE *** was a higher incidence of surgical site infection(43.2%vs 12.5%)(P=0.001)and postoperative diarrhea(54.1%vs 12.5%)(P=0.001)in the PDTRIANGLE *** rates of R0 resection and local recurrence,overall survival,and disease-free survival did not differ significantly between the two *** The TRIANGLE technique is safe,with acceptable postoperative morbidities compared with standardized PD,but it does not improve prognosis for patients with resectable PDAC.

关键词： Pancreatic ductal adenocarcinoma TRIANGLE technique Pancreaticoduodenectomy Prognosis Postoperative morbidities

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Continuous Production of Formic Acid Solution from Electrocatalytic CO_(2) Reduction Using Mesoporous Bi_(2)O_(3) Nanosheets as Catalyst

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CCS Chemistry 2024年第1期6卷 100-109页

作者： Zhonghao Tan Jianling Zhang Yisen yang Jiajun Zhong Yingzhe Zhao Jingyang Hu Yanyue Wang Zhuizhui Su Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049

Electrochemical reduction of CO_(2) to formic acid(HCOOH)is an important route for storing renewable energy and achieving carbon ***,we propose the continuous production of HCOOH solution from electrocatalytic CO_(2) reduction using highly mesoporous bismuth ox.de(Bi_(2)O_(3))nanosheets as an electrocatalyst and membrane electrode assembly with solid-state electrolyte as an ***,0.1 M of HCOOH solution could be produced continuously at a current density of -56 mA cm^(-2) for at least 43 *** underlying mechanism for the high performance of the electrocatalytic system was investigated by ex.erimental studies and theoretical calculations.

关键词： CO_(2)electroreduction formic acid Bi_(2)O_(3)nanosheet solid-state electrolyte Zn-CO_(2)battery

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Impact of Pd single-site coordination structure on catalytic performance for semihydrogenation of acetylene

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Nano Research 2024年第9期17卷 8243-8249页

作者： Yu Zeng Minqi x.a Fujie Gao Changkai Zhou x.eyi Cheng Liwei Liu Liu Jiao Qiang Wu x.zhang Wang Lijun yang Yining Fan Zheng Hu Key Laboratory of Mesoscopic Chemistry of MOE and Jiangsu Provincial Laboratory for Nanotechnology School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Semihydrogenation of trace acetylene in an ethylene gas stream is a vital step for the industrial production of polyethylene,in which Pd single-site catalysts(SSCs)have great ***,two Pd SSCs with different coordination structures are prepared on hierarchical nitrogen-doped carbon nanocages(hNCNC)by regulating the nitrogen species with or without using *** using dicyandiamide,the obtained Pd1-Ndicy/hNCNC SSC features the coordinated Pd by two pyridinic N and two pyrrolic N(PdN^(py)_(2)N^(pr)_(2)).Without using dicyandiamide,the obtained Pd1/hNCNC SSC features the coordinated Pd by pyridinic N and C(PdN^(py_(x.C_(4-x.),x.1-4).The former ex.ibits an 18-fold increase in catalytic activity compared to the *** results reveal the abundant unoccupied orbital states above the Fermi level of moiety,which can facilitate the activation of substrate molecules and dynamics of acetylene hydrogenation as supported by the combined theoretical and ex.erimental *** addition,PdN^(py)_(2)N^(pr)_(2)the moiety presents a favorable desorption of ***,the Pd1-Ndicy/hNCNC SSC ex.ibits high C2H2 conversion(99%)and C2H4 selectivity(87%)at 160℃.This study demonstrates the impact of Pd single-site coordination structure on catalytic performance,which is significant for the rational design of advanced Pd SSCs on carbon-based supports.

关键词： coordination structure hierarchical nitrogen-doped carbon nanocages palladium semihydrogenation of acetylene singlesite catalysts

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面向图像分析领域的黑盒对抗攻击技术综述

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计算机学报 2024年第5期47卷 1138-1178页

作者：武阳刘靖内蒙古大学计算机学院呼和浩特010021

图像领域下的黑盒攻击(Black-box.Attack)已成为当前深度神经网络对抗攻击领域的热点研究方向.黑盒攻击的特点在于仅利用模型输入与输出的映射关系,而无需模型内部参数信息及梯度信息,通过向图像数据加入人类难以察觉的微小扰动,进而造... 详细信息

图像领域下的黑盒攻击(Black-box.Attack)已成为当前深度神经网络对抗攻击领域的热点研究方向.黑盒攻击的特点在于仅利用模型输入与输出的映射关系,而无需模型内部参数信息及梯度信息,通过向图像数据加入人类难以察觉的微小扰动,进而造成深度神经网络(Deep Neural Network,DNN)推理与识别失准,导致图像分析任务的准确率下降,因此由黑盒攻击引起的鲁棒性问题成为当前DNN模型研究的关键问题.为提高黑盒攻击在图像分析任务下的攻击成效,现有相关研究以低查询次数、低扰动幅度、高攻击成功率作为优化目标,针对不同图像分析任务采用不同的攻击模式与评估方式.本文以主流的图像分析任务为出发点,阐述图像分类、目标检测与图像分割三类任务中黑盒攻击算法的核心思想和难点,总结黑盒对抗攻击领域中的关键概念与评估指标,分析不同图像分析任务中黑盒对抗攻击的实现策略与研究目标.阐明各个黑盒攻击算法间的关系与优势,从攻击成功率、查询次数以及相似性度量等多个方面对不同的黑盒攻击算法进行性能比较,以提出目前图像分析领域中黑盒对抗攻击仍存在的主要挑战与未来研究方向.

关键词：黑盒对抗攻击深度神经网络鲁棒性图像分类目标检测图像分割

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An ensemble machine learning model to uncover potential sites of hazardous waste illegal dumping based on limited supervision ex.erience

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Fundamental Research 2024年第4期4卷 972-978页

作者： Jinghua Geng Yimeng Ding Wenjun x.e Wen Fang Miaomiao Liu Zongwei Ma Jianx.n yang Jun Bi State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023 China

With the soaring generation of hazardous waste(HW)during industrialization and urbanization,HW illegal dumping continues to be an intractable global *** in developing regions with lax.regulations,it has become a major source of soil and groundwater *** dominant challenge for HW illegal dumping supervision is the invisibility of dumping sites,which makes HW illegal dumping difficult to be found,thereby causing a long-term adverse impact on the *** to utilize the limited historic supervision records to screen the potential dumping sites in the whole region is a key challenge to be *** this study,a novel machine learning model based on the positive-unlabeled(PU)learning algorithm was proposed to resolve this problem through the ensemble method which could iteratively mine the features of limited historic *** of the random forest-based PU model showed that the predicted top 30%of high-risk areas could cover 68.1%of newly reported cases in the studied region,indicating the reliability of the model *** novel framework will also be promising in other environmental management scenarios to deal with numerous unknown samples based on limited prior ex.erience.

关键词： Hazardous waste Illegal dumping site Positive-unlabeled machine learning Probability prediction Model interpretation

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通信受限条件下多无人机协同环境覆盖路径规划

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中国惯性技术学报 2024年第3期32卷 273-281页

作者：陈洋周锐武汉科技大学信息科学与工程学院武汉430081 武汉科技大学冶金自动化与检测技术教育部工程研究中心武汉430081

多无人机协同覆盖旨在有效分配多个无人机任务,实现给定区域的快速、高效全覆盖。然而,在现实应用场景中常常因为无人机之间距离超出通信范围,信号传输受阻,导致无人机之间的协作和信息交互面临极大挑战。为此,提出一种基于Deep Q Netwo... 详细信息

多无人机协同覆盖旨在有效分配多个无人机任务,实现给定区域的快速、高效全覆盖。然而,在现实应用场景中常常因为无人机之间距离超出通信范围,信号传输受阻,导致无人机之间的协作和信息交互面临极大挑战。为此,提出一种基于Deep Q Networks(DQN)的多无人机路径规划方法。采用通信中断率和最大通信中断时间两个指标来评价路径质量,通过构建与指标相关的奖励函数,实现了无人机团队的自主路径决策。仿真实验表明,所提方法在最短路径上可以与传统优化算法效果保持一致,权衡路径下在增加20%路径长度的情况下可以降低80%通信中断率,在全通信路径下则可以实现100%的全过程连接通信,因此可以根据不同的通信环境生成高效覆盖所有环境节点的路径。

关键词：环境覆盖多无人机通信约束深度Q网络路径规划

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Selective removal of Cr(Ⅵ)using polyvinylpyrrolidone and polyacrylamide co-modified MoS_(2) ccomposites by adsorption combined with reduction

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Chinese Chemical Letters 2024年第6期35卷 524-530页

作者： Shuqi Yu Yu yang Keisuke Kuroda Jian Pu Rui Guo Li-An Hou State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Department of Environmental and Civil Engineering Toyama Prefectural UniversityImizuToyama 939-0398Japan Institute for the Advanced Study of Sustainability United Nations UniversityJingumae 5-53-70Shibuya-kuTokyo 150-8925Japan Technical Centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China

Cr(Ⅵ),one of the most hazardous metal pollutants,poses significant threats to the environment and human ***,a novel MoS_(2) composite(MoS_(2)/PVP/PAM)modified by polyvinylpyrrolidone(PVP)and polyacrylamide(PAM)was synthesized to enhance the removal of Cr(Ⅵ).Characterization analysis including SEM,x.D,FTIR,and x.S indicated that PVP and PAM could increase the interlayer spacing and the dispersibility of MoS_(2),and introduce pyrrolic N and amino functional *** batch ex.eriments showed that MoS_(2)/PVP/PAM represented ex.ellent Cr(Ⅵ)removal performance over a wide p H range,and ex.ibited a significantly higher max.mum Cr(Ⅵ)adsorption capacity(274.73 mg/g,at p H 3.0,and 298 K)than pure MoS_(2).The adsorption of Cr(Ⅵ)followed Langmuir and pseudo-second-order kinetic model,which was a homogeneous monolayer chemisorption ***_(2)/PVP/PAM showed stable removal of Cr(Ⅵ)in the presence of humic acid(HA),interfering cations and anions at different ***,it had ex.ellent selectivity for Cr(Ⅵ)(K_(d) value of 1.69×10^(7)m L/g)when coex.sting with a variety of competing *** characterization revealed that Cr(Ⅵ)was reduced to low tox.city Cr(Ⅲ)by Mo^(4+)and S^(2-),and then chelated on the surface of the adsorbent by pyrrolic *** research ex.anded the design concept for MoS_(2) composites by demonstrating the potential of MoS_(2)/PVP/PAM as a promising material for selective elimination of Cr(Ⅵ)in water.

关键词： Polyvinylpyrrolidone Polyacrylamide MoS_(2) Cr(Ⅵ)removal Adsorbent Reduction

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