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Detection navigation baseline in row-following operation of maize weeder based on axis extraction

International Journal of Agricultural and Biological Engineering 2020年第5期13卷 181-186页

作者： junhui feng Zhiwei Li Wei Yang Xiaoping Han Xueli Zhang College of Agricultural Engineering Shanxi Agricultural UniversityJinzhong 030801ShanxiChina

Detection navigation baseline is primary for the automation of maize weeder in seedling.In the navigation technology based on machine vision,maize seeding or weed near the camera is photographed as a discrete area,while a plant far away from the camera is photographed as a strip area along with other plants in the same row.The two problems cannot be solved by one method.However,in this paper,an algorithm of detection navigation baseline in the row-following operation of maize weeder based on axis extraction was proposed to solve the both problems.Firstly,plants are distinguished from the background based on color feature,and the binary image is acquired.Secondly,plants are described as a set of connected components with numbers after connected components labeling and noise clearing.Thirdly,the axes of all connected components are extracted according to the calculation method of rotary inertia in physics.Next,the abnormal connected components with axes are deleted because the angles between the axes and X-axis are above angle threshold.Then,the judgment model is built based on angle tolerance and distance tolerance,the connected components in a same row based on this model through two-step traversal are merged,and a new axis is re-extracted as the axis of the plant row.Finally,the navigation baselines are detected based on the axes of the plant row.The experimental results show that the accuracy of this algorithm is more than 93%,and the computing time is less than 1.6 s,which can meet the accuracy and real-time performance requirements of maize weeder.

关键词： detection navigation baseline maize weeder machine vision extraction axis

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Experimental Study of Dynamic Characteristics on Composite Foundation with CFG Long Pile and Rammed Cement-Soil Short Pile

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Open Journal of Civil Engineering 2014年第1期4卷 1-12页

作者： Jihui Ding Yanliang Cao Weiyu Wang Tuo Zhao junhui feng China Metallurgical Design and Research Institute Co. Ltd. Baoding China College of Civil Engineering Hebei University Baoding China Hebei Academy of Building Research Shijiazhuang China

Based on the idea of optimization design of pile type, the two kinds of the typical pile type are selected, which containing flexibility pile (e.g. rammed cement-soil pile is for short RCSP), and rigid pile (e.g. cement-flyash-gravel pile is for short CFGP). The three kinds of the composite foundation are designed, which are CFGP, CFG long pile and CFG short pile (for short CFGLP-CFGSP), CFG long-short pile and rammed cement-soil short pile (for short CFGLP-RCSSP). Natural earthquake is simulated by using the engineering blasting;the dynamic characteristics and dynamic response of the composite foundation are studied through field test. CFGLP-RCSSP is closed to linear relation. The bearing capacity of the four composite foundation of the CFGP, CFGLP-CFGSP, and CFGLP-RCSSP in the site are 225 kPa, 179 kPa, and 197 kPa, separately increases 150%, 98.8% and 119% compared to the natural foundation. The vibration main frequency is mainly depended on properties of foundation soil and piles between vibration source and measuring point, pilling load value. Horizontal vibration main frequency greater than the vertical vibration main frequency and the vertical vibration main frequency close to the first-order natural frequency of composite foundation. With the pilling load increasing, the CFGLP-RCSSP pile composite foundation combined frequency decreased. Under the same blast energy, the acceleration peak on the CFG pile composite foundation is less than CFGLP-CFGSP the corresponding values, as the load increases, the peak acceleration gently. CFG pile composite foundation is favorable on seismic. The distribution of peak acceleration is consistent within 4 m from pile top in the CFGLP_RCSSP composite foundation. The maximum of the horizontal acceleration peak along the pile body occurs at a distance of pile top 4 m or the pile top, and that of vertical acceleration peak occurred at a pile top.

关键词： Blasting Vibration CFG Pile Rammed Cement-Soil Pile Combined Pile Composite Foundation Dynamic Characteristics

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The Dynamic Characteristic Experimental Method on the Composite Foundation with Rigid-Flexible Compound Piles

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Open Journal of Civil Engineering 2013年第2期3卷 94-98页

作者： Jihui Ding Weiyu Wang Tuo Zhao junhui feng Panxing Zhang College of Civil Engineering Hebei University Baoding China Hebei Academy of Building Research Shijiazhuang China

Based on the idea of optimization design of pile type, the composite foundations, which include cememt-flyash-gaavel (for short CFG) long piles and cement-soil (for short CS) short piles, and CS piles with CFG core as well, are formed. The method of the site dynamic characteristic tests of the composite foundations is discussed. The test results show that fireworks bomb may replace demolitions as the vibration resource. Vibration time is about 0.1 sec. Horizontal vibration major frequency is at 22.476 - 56.436 Hz, and vertical vibration major frequency is at 15.538 - 55.884 Hz. The pile arrangements of the composite foundation in the same site have more effect on the acceleration peak value. From the point of vibration, the anti-seismic effect of the CS piles with CFG core is better than others.

关键词： Cement-Soil Piles Cememt-Flyash-Gaavel Piles Composite Foundation Dynamic Characteristic In-Site Test

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Spherical cationic polymer networks with porphyrin photosensitizer for sustainable and efficient photocatalysis

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Nano Research 2024年第5期17卷 3934-3941页

作者： Lingling Zhang Liwei Wu junhui Bao Longhui Li Zejun Liu feng Bai Jie Ju Xi Yao Key Laboratory for Special Functional Materials of Ministry of Education School of Materials Science and EngineeringHenan UniversityKaifeng 475004China Department of Chemistry City University of Hong KongKowloonHong Kong 999077China

The continuous and sustainable photo-activity on micro-or nano-carriers has always been a key stepping stone in the industrialization of photo-catalysis,photo-synthesis,and photo-degradation.Herein,we report a new series of positively charged hollow microspheres carrying porphyrin moieties.Such hollow spheres are formed through crosslinking of well-ordered porous thin laminates,initiated by co-assembly of regular monomers and those decorated with porphyrin moieties.On the surface of an individual sphere,densely distributed positive sites attract anionic reactants.The superficial porphyrin decomposes the accumulated reactants under 1 Sun.After degradation and release of products,the photoactive sites are thereby renewed.We demonstrate that polymer network(1:10)exhibited superior sustainable photocatalytic performance with complete degradation of methyl orange(MO)in 40 min with no observable performance deterioration after six cycles.The established close loop of adsorption-reaction-release cycle makes possible many efficient and continuous photo-catalytic processes.

关键词： hydrogen bonding assembly porphyrin sustainable photo-activity anionic pollutant

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棉花黄萎病生防菌筛选鉴定及根瘤菌DG3-1对棉花生长的影响

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山东农业科学 2024年第5期56卷 138-144页

作者：代先兴闫成才祖丽胡玛尔·麦提喀迪尔王庆朋冯俊辉李猛王兰牛冬冬郝海婷塔里木大学农学院/南疆农业有害生物综合治理兵团重点实验室新疆阿拉尔843300 南京农业大学植物保护学院江苏南京210000

本研究旨在发掘南疆棉花内生菌种质资源来防治棉花黄萎病,探究根瘤菌对棉花生长的影响。采用常规组织分离法分离棉花不同组织内生细菌;平板对峙法筛选拮抗棉花黄萎病菌的内生菌,并对其进行分子鉴定;通过盆栽试验研究根瘤菌对棉花生长的... 详细信息

本研究旨在发掘南疆棉花内生菌种质资源来防治棉花黄萎病,探究根瘤菌对棉花生长的影响。采用常规组织分离法分离棉花不同组织内生细菌;平板对峙法筛选拮抗棉花黄萎病菌的内生菌,并对其进行分子鉴定;通过盆栽试验研究根瘤菌对棉花生长的影响。结果显示,棉花不同组织内生细菌的数量具有一定差异,根部最多,其次是叶和茎;在分离获得的31株内生菌中,有11株对棉花黄萎病菌具有拮抗活性,抑菌率在35.99%~68.28%之间,经鉴定,9株为芽孢杆菌,2株为根瘤菌,其中,根瘤菌DG3-1对棉花黄萎病菌的抑制率为(56.63±1.82)%;盆栽试验结果表明,菌株DG3-1处理后棉株的地上鲜重、地上干重、地下鲜重、地下干重、叶绿素含量分别比对照增加2.12、2.09、1.05、0.75、1.75倍。菌株DG3-1对棉花黄萎病菌有较好的抑制作用,并且对棉花的生长有一定的促生作用,是防治棉花黄萎病的潜力菌株,可为微生物菌剂的研发提供菌种资源。

关键词：棉花内生细菌棉花黄萎病拮抗根瘤菌DG3-1 促生

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Single-cell transcriptomics reveals the ameliorative effect of rosmarinic acid on diabetic nephropathy-induced kidney injury by modulating oxidative stress and inflammation

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Acta Pharmaceutica Sinica B 2024年第4期14卷 1661-1676页

作者： junhui Chen Qian Zhang Jinan Guo Di Gu Jing Liu Piao Luo Yunmeng Bai Jiayun Chen Xinzhou Zhang Sheng Nie Chunbo Chen Yulin feng Jigang Wang National Pharmaceutical Engineering Center for Solid Preparation of Chinese Herbal Medicine Jiangxi University of Chinese MedicineNanchang 330006China Department of Pulmonary and Critical Care Medicine Shenzhen Institute of Respiratory Diseasesand Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalFirst Affiliated Hospital of Southern University of Science and TechnologySecond Clinical Medical College of Jinan UniversityShenzhen 518020China School of Traditional Chinese Medicine and School of Pharmaceutical Sciences Southern Medical UniversityGuangzhou 510515China Department of Urology and Shenzhen Clinical Research Centre for GeriatricsShenzhen People's Hospitalthe First Affiliated HospitalSouthern University of Science and TechnologyShenzhen 518020China Department of Urology the First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510230China Department of Nephrology Shenzhen Key Laboratory of Kidney Diseasesand Shenzhen Clinical Research Centre for GeriatricsShenzhen People's Hospitalthe First Affiliated HospitalSouthern University of Science and TechnologyShenzhen 518020China Department of Nephrology Nanfang Hospitalthe First Affiliated Hospital of Southern Medical UniversityGuangzhou 510515China Department of Critical Care Medicine Shenzhen People's Hospital(the Second Clinical Medical CollegeJinan Universitythe First Affiliated HospitalSouthern University of Science and Technology)Shenzhen 518020China State Key Laboratory for Quality Esurance and Sustainable Use of Dao-di Herbs Artemisinin Research Centerand Institute of Chinese Materia MedicaChina Academy of Chinese Medical SciencesBeijing 100700China Department of Oncology the Affiliated Hospital of Southwest Medical UniversityLuzhou 646000China

Diabetic nephropathy(DN)is a severe complication of diabetes,characterized by changes in kidney structure and function.The natural product rosmarinic acid(RA)has demonstrated therapeutic effects,including anti-inflammation and anti-oxidative-stress,in renal damage or dysfunction.In this study,we characterized the heterogeneity of the cellular response in kidneys to DN-induced injury and RA treatment at single cell levels.Our results demonstrated that RA significantly alleviated renal tubular epithelial injury,particularly in the proximal tubular S1 segment and on glomerular epithelial cells known as podocytes,while attenuating the inflammatory response of macrophages,oxidative stress,and cytotox-icity of natural killer cells.These findings provide a comprehensive understanding of the mechanisms by which RA alleviates kidney damage,oxidative stress,and inflammation,offering valuable guidance for the clinical application of RA in the treatment of DN.

关键词： Rosmarinic acid Diabetic nephropathy scRNA sequencing Injury Oxidative stress Infiammation Proteomics

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一种针对物联网智能系统的规则冲突检测方法

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计算机研究与发展 2023年第3期60卷 592-605页

作者：杨波郭浩然冯俊辉李戈金芝北京林业大学信息学院北京100083 北方工业大学信息学院北京100144 国家林业和草原局林业智能信息处理工程技术研究中心(北京林业大学) 北京100083 北京大学计算机学院北京100871 高可信软件技术教育部重点实验室(北京大学) 北京100871

物联网系统架构的核心是逻辑控制器,逻辑控制器中使用规则控制业务逻辑,减少物联网系统的开发、维护成本,提高物联网设备的灵活性.但随着物联网系统的规模扩大,规则间的关系变得复杂,从而可能产生规则冲突.为避免规则发生冲突,一些研究... 详细信息

物联网系统架构的核心是逻辑控制器,逻辑控制器中使用规则控制业务逻辑,减少物联网系统的开发、维护成本,提高物联网设备的灵活性.但随着物联网系统的规模扩大,规则间的关系变得复杂,从而可能产生规则冲突.为避免规则发生冲突,一些研究者提出了规则冲突检测方法.但是,以往的规则冲突检测方法还存在规则冲突类型分析不全面、检测结果准确性较低的问题.为此提出一种针对物联网系统控制逻辑的形式化规则冲突检测方法(formal rule conflict detection,FRCD).该方法首先形式化定义规则及规则冲突,其中将规则定义为控制主体、动作、触发条件、符号的组合;然后根据规则对系统的影响以及规则的结构特征,总结出7类规则冲突类型;最后设计规则冲突检测的算法,并介绍规则冲突检测的详细过程.在2个物联网系统上开展实验,与已有的3种典型的物联网规则冲突检测方法进行对比.这3种方法分别是基于用户、触发器、环境实体和作动器的冲突检测方法(user,triggers,environment entities,and actuators,UTEA)、基于Web语义的策略冲突检测方法(semantic Web-based policy interaction detection with rules,SPIDER)和半形式化的冲突检测方法(identifying requirements interactions using semiformal,IRIS).实验结果显示,FRCD规则冲突检测方法效果更好.

关键词：物联网智能系统规则冲突冲突检测规则形式化

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机动车污染防治存在的问题以及对策

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山西化工 2023年第2期43卷 226-228页

作者：冯军辉阳泉市生态环境监测和应急保障中心山西阳泉045000

在我国现代化社会经济的快速发展中,国民经济水平不断提高,城市的机动车数量也有所增长,机动车的运行负荷强大,不可避免的对我国的生态环境、城市空气等产生污染。在城市大气污染问题逐渐加剧的背景下,治理机动车污染问题落实有效的防... 详细信息

在我国现代化社会经济的快速发展中,国民经济水平不断提高,城市的机动车数量也有所增长,机动车的运行负荷强大,不可避免的对我国的生态环境、城市空气等产生污染。在城市大气污染问题逐渐加剧的背景下,治理机动车污染问题落实有效的防治措施,已经成为了政府和社会各界人士关注的话题。本文分析了机动车污染防治的技术现状,结合目前机动车污染防治中存在的问题,提出了机动车污染防治的优化对策。

关键词：机动车污染防治问题对策

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污染源在线监控现状问题分析及管理

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山西化工 2023年第4期43卷 242-243,249页

作者：冯军辉阳泉市生态环境监测和应急保障中心山西阳泉045000

在社会经济的快速发展中,环境污染问题目前已经受到了国家和社会各界人民普遍的关注,为了消除污染,改善污染现状,落实可持续发展的理念,利用污染源在线监控的管理方法,将在线监控系统的功能利用起来,可以有效的提高环境应急管理水平。... 详细信息

在社会经济的快速发展中,环境污染问题目前已经受到了国家和社会各界人民普遍的关注,为了消除污染,改善污染现状,落实可持续发展的理念,利用污染源在线监控的管理方法,将在线监控系统的功能利用起来,可以有效的提高环境应急管理水平。本文对污染源在线监测中的环保问题进行了探讨,结合污染源在线监测在环保中的意义,提出了污染源在线监控的环保管理方法。

关键词：污染源在线监控现状管理

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基于误比特信息区间斜率的正交频分复用水声通信多普勒估计

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声学学报 2024年第3期49卷 560-568页

作者：李斌童峰姚俊辉陈建峰福建理工大学智慧海洋科学技术学院福州350118 导航与位置服务技术国家地方联合工程研究中心(厦门大学) 厦门361002 厦门大学海洋与地球学院厦门361002 西安天和海防智能科技有限公司西安710061

针对正交频分复用水声通信中直接误比特率搜索多普勒估计算法存在的高计算复杂度问题,提出了一种基于误比特信息区间斜率的多普勒估计算法,采用计算误比特信息区间斜率取代逐网格搜索最优误比特信息寻优过程,设计根据多普勒估计分辨率... 详细信息

针对正交频分复用水声通信中直接误比特率搜索多普勒估计算法存在的高计算复杂度问题,提出了一种基于误比特信息区间斜率的多普勒估计算法,采用计算误比特信息区间斜率取代逐网格搜索最优误比特信息寻优过程,设计根据多普勒估计分辨率动态可变的斜率区间,在进一步提升寻优速率的同时有效减小陷入局部最优解的可能性,并有效降低算法的计算复杂度。仿真实验和海上试验结果表明:所提算法以较低的计算代价实现了与误比特率搜索多普勒估计算法近乎一致的估计性能,在本文试验条件下其相对块多普勒估计、基于互模糊度函数多普勒估计以及准梯度互相关多普勒估计算法可获得不低于14%的误比特率性能改善。

关键词：多普勒估计区间斜率误比特信息正交频分复用水声通信

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