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| 1 | Seedling-lump integrated non-destructive monitoring for automatic transplanting with Intel RealSense depth camera显示文摘Non-destructive plant growth parameters measurement is an important concern in automatic-seedling transplanting.Recently,several image-basedmonitoring approaches have been proposed and potentially developed for several agricultural applications.The presented study proposed and developed a RealSense-based machine vision system for the close-shot seedling-lump integrated monitoring.The strategy was based on the close-shot depth information.Further,the point cloud clustering and suitable algorithms were applied to obtain the segmentation of 3D seedling models.In addition,the data processing pipeline was developed to assess the differentmorphological parameter of 4 different seedling varieties.The experiments were carried out with 4 different seedling varieties(pepper,tomato,cucumber,and lettuce)and trained under different light conditions(light and dark).Moreover,analysis results showed that therewas not significantly different(p<0.05)found towards light and dark environments due to close-shot near-infrared detection.However,the results revealed that the stem diameter relationship between RealSense and the manual method was found for R^2=0.68 cucumber,R^2=0.54 tomato,R^2=0.35 pepper,and R^2=0.58 lettuce seedlings.Whereas,the seedling height relationship between RealSense and the manual methodwas found higher than R^2=0.99,0.99,0.99,and 0.99 for pepper,tomato,cucumber,and lettuce,respectively.Based on the experiment results,it was concluded that the RGB-D integrated monitoring system with the purposed method could be practiced for nursery seedlings most promisingly without high labour requirements in terms of ease of use.The system revealed a good sturdiness and relevance for plant growth monitoring.Additionally,it has the perspective for future practical value to real-time vision servo operations for transplanting robots. | Tabinda Naz Syed Liu Jizhan Zhou Xin Zhao Shengyi Yuan Yan Sami Hassan Ahmed Mohamed Imran Ali Lakhiar | 2019 | Artificial Intelligence in Agriculture2019，，3： | 4 |
| 2 | Analysis of Chang’e-5 lunar core drilling process显示文摘Chang’e-5 explorer successfully acquired lunar regolith core samples from depths of greater than 1 m of lunar surface.This study analyzed the lunar core drilling process based on the telemetry data,image information,and returned samples to optimize the sampling device design and enhance the understanding of the lunar regolith.In particular,a prediction method for the projected drilling path and local terrain fitting of drilling dip angle was proposed based on the flight events recorded during the core drilling process and the image information acquired before,during,and after sampling.The results revealed that the drilling dip angle of Chang’e-5 was approximately2.3.,and the deviation of the drilling length and depth was less than 2 mm.For continuous drilling,a fusion method based on telemetry data and image information was applied to determine the demarcation point of drilling with and without the lunar soil.The position of the demarcation point implied that the drilling point remained at approximately 6 mm loose soil,thereby lagging the action of the force response.Additionally,a characteristic parameter comparison method was proposed for the lunar and ground drilling to analyze the status of the lunar soil.Furthermore,the analysis results revealed that the majority of the Chang’e-5 drilling samples were derived from 0–73.8 cm below the lunar surface and few samples were extracted below 73.8 cm,as the drilling encountered several rocky regions.Moreover,the drilling point exhibited two prominent stratification variations at~28.7 cm and~70 cm below the lunar surface.Ultimately,the preliminary relationship between sample dissected position in soft tube and drilling displacement was analyzed.The segmented estimation results can support research on subsurface lunar soil. | Yanhong ZHENG Mengfei YANG Xiangjin DENG Shengyi JIN Jing PENG Yan SU Zheng GU Liping CHEN Yong PANG Nai ZHANG | 2023 | Chinese Journal of Aeronautics2023，36，2： | 3 |
| 3 | Multiscale evolution mechanism of sandstone under wet-dry cycles of deionized water:From molecular scale to macroscopic scale显示文摘Water is the most abundant molecule found on the earth’s surface and is a key factor in multiscale rock destruction.However,given the fine-grained nature of rock and the complexity of its internal structure,the microstructural evolution of rock under the action of water has not yet been elucidated in detail,and little is understood about the relationship between the rock structure and solideliquid unit.A variety of techniques were used in this study to track the mechanical properties,pore and crack characteristics,and mineral structure degradation characteristics of sandstone at different stages under the action of deionized water,and the evolution mechanisms of the microstructure were analyzed at the molecular scale.The results showed that during the watererock interaction process,water was adsorbed onto the surface of dolomite minerals and the hydrophilic surface of clay minerals,forming a high-density hydrogen bond network.However,different mineral surface structures had different water adsorption structures,resulting in the strain of the dense clay mineral aggregates under expansion action.Stress concentrated at crack tips under the capillary force of dolomite minerals(very weak dolomite dissolution).These effects resulted in a substantial increase in the number of small pores and enhancements in poreecrack connectivity,and the rock strength exhibited varying degrees of decline at different stages of wet-dry cycles.In general,the results of this paper will help to further elucidate the internal connections between molecular-scale and macroscale processes in rock science. | Jie Meng Changdong Li Jia-Qing Zhou Zihan Zhang Shengyi Yan Yahui Zhang Dewei Huang Guihua Wang | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，5： | 1 |
| 4 | A dual-responsive supramolecular polymer gel formed by crown ether based molecular recognition显示文摘 | Dong Shengyi Luo Yan Yan Xuzhou | 2011 | Angewandte Chemie2011，123，8： | 1 |
| 5 | Construction of Supramolecular Polymers Based on Host-Guest Recognition显示文摘What is the most favorite and original chemistry developed in your research group?The establishment of two new types of host-guest recognition building blocks(21-crown-7/secondary ammonium salt and pillar[5]arene/alkyl chain)for supramolecular polymers.How do you get into this specific field?Could you please share some experiences with our readers?I got my introduction to supramolecular chemistry during the postgraduate period.There are many phenomena closely related to the weak non-covalent interactions in nature,such as the storage and transmission of genetic information through the DNA double helix structure.Inspired by these fascinating natural phenomena,scientists try to use non-covalent Interactions to prepare many very complex self-assembled systems including supramolecular polymers from natural and artificially designed structural units.In 1987,Lehn,Cram,and Pederson won the Nobel Prize for their contribution to supramolecular chemistry.At present,supramolecular chemistry has developed into an emerging discipline formed by the intersection of chemistry,physics,life sciences,materials science,and electronic engineering. | Xiaofan Ji Feng Wang Xuzhou Yan Shengyi Dong Feihe Huang | 2020 | Chinese Journal of Chemistry2020，38，12： | 1 |
| 6 | Supramolecular control over LCST behavior of hybrid macrocyclic system based on pillar[5]arene and crown ether显示文摘A hybrid system containing a pillar[5]arene unit and ten crown ether moieties was developed.The LCST behavior and thermo-responsive ness were successfully introduced into this pillar[5]arene-crown ether system.Both host-guest interactions and salting-out effect displayed great effects in realizing the supramolecular control over LCST properties and the rmo-re sponsiveness.Compa red with the individual macrocycles,this hybrid macrocycle system dramatically amplified the supramolecular control effect over LCST behavior. | Yan Deng Xing Li Chengyou Han Shengyi Dong | 2020 | Chinese Chemical Letters2020，31，12： | 0 |
| 7 | New multi-UAV formation keeping method based on improved artificial potential field显示文摘Formation keeping is important for multiple Unmanned Aerial Vehicles(multi-UAV)to fully play their roles in cooperative combats and improve their mission success rate.However,in practical applications,it is difficult to achieve formation keeping precisely and obstacle avoidance autonomously at the same time.This paper proposes a joint control method based on robust H∞ controller and improved Artificial Potential Field(APF)method.Firstly,we build a formation flight model based on the “Leader-Follower”structure and design a robust H∞ controller with three channels X,Y and Z to eliminate dynamic uncertainties,so as to realize high-precision formation keeping.Secondly,to fulfill obstacle avoidance efficiently in complex situations where UAVs fly at high speed with high inertia,this paper comes up with the improved APF method with deformation factor considered.The judgment criterion is proposed and applied to ensure flight safety.In the end,the simulation results show that the designed controller is effective with the formation keeping a high accuracy and in the meantime,it enables UAVs to avoid obstacles autonomously and recover the formation rapidly when coming close to obstacles.Therefore,the method proposed here boasts good engineering application prospect. | Hanlin SHENG Jie ZHANG Zongyuan YAN Bingxiong YIN Shengyi LIU Tingting Bai Daobo WANG | 2023 | Chinese Journal of Aeronautics2023，36，11： | 0 |
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