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| 1 | Development status and trend of agricultural robot technology显示文摘In the face of the contradiction between the increasing demand for agricultural products and the sharp reduction of agricultural resources and labor force,agricultural robot technology is developing explosively on the basis of decades of technical and industrial exploration.In view of the complexity and particularity of the development of agricultural robot technology,it is of great value to summarize its development characteristics and make reasonable judgments on its development trend.In this paper,the type of agricultural robot systems was first discussed.From the classification of agricultural robot systems,the development of main types of monitoring robots,non-selective and selective working robots for crop farming,livestock and poultry farming and aquaculture were introduced in detail.Then the scientific research,core technology,and commercialization of different types of agricultural robots were summarized.It is believed that navigation in complex agricultural environments,damage-free robot-crop interaction,and agronomy-robot fusion have high scientific value and significance to promote the revolutionary advances in agricultural robot technology.The characteristics of inter-discipline between agricultural robot technology and new materials,artificial intelligence,bionics,agronomy are research focus.The fast damage-free operation,autonomous navigation for complex environments,target detection for complex backgrounds,and special design for agricultural robots are considered to be the key technology of agricultural robot development,and the development path is given.Finally,robot-crop interaction simulation,big data support,and artificial intelligence are regarded as paths to realize the breakthrough of key agricultural robot technologies.The summary and prospect of this paper are of positive significance to promote the overall development of agricultural robot technology. | Yucheng Jin Jizhan Liu Zhujie Xu Shouqi Yuan Pingping Li Jizhang Wang | 2021 | International Journal of Agricultural and Biological Engineering2021，14，4： | 6 |
| 2 | 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 |
| 3 | Tensile mechanical properties of greenhouse cucumber cane显示文摘To obtain the mechanical properties of greenhouse cucumber cane,tensile and shear properties of the greenhouse cucumber cane were studied by using computer-controlled electronic universal testing machine and homemade cutting test bench,respectively.Firstly,the root,middle and head of cucumber cane were subjected for tensile tests.The tensile stress-strain curves showed that the root of cumber cane presented the characteristics of plastic material,while the middle and head showed the characteristics of brittle material.The average tensile strength of root,middle and head of fresh cucumber cane were 7.35 MPa,6.30 MPa and 4.68 MPa,respectively.The average elastic modulus of root of fresh cucumber cane was 280.58 MPa,which was much greater than the middle and head with average elastic modulus of 198.81 MPa and 137.22 MPa,respectively.A pendulum impact cutting test-rig and a cutting force measurement system composed of a cantilever weigh sensor,a high frequency DAQ card and motion control card were developed.The cutting mechanical property experiments of different parts of greenhouse cucumber cane were carried out,and the continuous curves of cutting force were measured.The single factor test for cross-sectional area,cutting speed,cutting tool type and manner were analyzed.The results indicated that the peak cutting force increased approximately linearly with the increasing of cutting sectional area,but decreased gradually with the increasing of cutting speed.In the same conditions,the cutting force could be reduced by using straight blade cutting tool and ramp cutting way.Through the multifactor interaction impact test of the cutting way,the blade type and the cutting speed,it was found that the corresponding F-value of the three factors were 21.316,49.141 and 0.222,which suggests that the blade type is the most significant factor for the cutting force. | Xu Yunfeng Zhang Xiliang Sun Xiaojia Wang Jizhang Liu Jizhan Li Zhiguo Guo Qian Li Pingping | 2016 | International Journal of Agricultural and Biological Engineering2016，9，5： | 2 |
| 4 | Study on photosynthetic characteristics of Orychophragmus violaceus related to shade-tolerance显示文摘 | Yanyou Wu Pingping Li Yuguo Zhao Jizhan Wang Xiangming Wu | 2007 | Scientia Horticulturae2007，，2： | 1 |
| 5 | Study on the collision-mechanical properties of tomatoes gripped by harvesting robot fingers显示文摘 | Li ZhiGuo Liu JiZhan Li PingPing | 2009 | African Journal of Biotechnology2009，8，24： | 1 |
| 6 | Physical and mechanical properties of tomato fruits as related to robot’s harvesting显示文摘 | Zhiguo Li Pingping Li Jizhan Liu | 2010 | Journal of Food Engineering2010，，2： | 1 |
| 7 | Feasibility and in- fluencing factors of laser cutting of tomato peduncles for ro- botic harvesting 显示文摘 | Jizhan Liu Yang Hu Xiuqiong xu | 2011 | African Journal of Biotechnology2011，10，15： | 1 |
| 8 | Physical and mechanical properties of tomato fruits as related to robot's harvesting显示文摘 | Li Zhiguo Li Pingping Liu Jizhan | 2011 | Journal of Food Engineering2011，103，2： | 1 |
| 9 | Microclimatic parameters affect Cladosporium rot development and berry quality in table grapes显示文摘Cladosporium cladosporioides is an emerging pathogenic fungus that causes Cladosporium rot in postharvest table grapes(Vitis vinifera). However,studies investigating the infection process of C. cladosporioides are lacking. Therefore, this study aimed to elucidate the infection process by investigating the influence of microclimatic parameters(temperature, wetness and fungal age) in C. cladosporioides pathogenesis, activities of grape defense-related enzymes and grape quality during the infection. C. cladosporioides effectively infects grapes by developing distinct colonies on the artificial wounds and berry surfaces, completing its life cycle within 48 h. The C. cladosporioides disease incidence optimally occurred at 20 ℃ and 25 ℃. Wetness played an influential role in the infectivity of C. cladosporioides and 7-day-old C. cladosporioides resulted in the most serious disease incidence of table grapes. As a result of infection, the quality of grapes was affected, including berry weight, p H, titratable acidity(TA), total soluble solids(TSS), and ascorbic acid level. This infection also induced defense-related enzymes, including polyphenoloxidase(PPO), peroxidase(POD), phenylalanine ammonialyase(PAL), and catalase(CAT), at certain times. The findings of this study demonstrated that Cladosporium rot development depended on the microclimatic parameters of grapes, significantly affected the grape quality and induced grape's defense-related enzymes. | Dhanasekaran Solairaj Ngolong Ngea Guillaume Legrand Qiya Yang Jizhan Liu Hongyin Zhang | 2022 | Horticultural Plant Journal2022，8，2： | 1 |
| 10 | Formation of Two F_(2)^(+)-Like Centers Coexisting in KCl:Li^(+),Na^(+),OH^(-)Crystal显示文摘To enlargen tuning range in a single host material,we have simultaneously created(F_(2)^(+))Li^(+),H^(-)(F_(2)^(+))Na^(+),H color centers in KCl:Li^(+),Na^(+),OH^(-)crystal,whose emission wavelength covers from 1.45 to 2.45μm.The experiments prove that two coexisting F_(2)^(+)-like centers in KCl have high concentration and good stability. | LIN Bizhou XU Chenghuang QIU Jizhan CHEN Guangfu | 1994 | Chinese Physics Letters1994，11，10： | 0 |
| 11 | Hanging force analysis for realizing low vibration of grape clusters during speedy robotic post-harvest handling显示文摘Mechanical damage induced by vibration during harvesting and post-harvest handling could decrease the quality,quantity,and shelf life of the fresh grape cluster.Usually,fresh grape clusters are harvested by gripping and cutting from the main rachis in the present robotic harvesting system,then transported towards the basket during post-harvest handling.However,serious cluster vibration and corresponding berry falling may occur during the robotic transportation of hanging grape clusters.Therefore,this study was designed to perform experimental and theoretical hanging force analysis to explore the vibration mechanism of hanging grape clusters during robotic transportation.A lead screw lathe with an attached linear actuator was used to investigate the effects of four different speeds(0.4,0.6,0.8,1.0 m/s)with four acceleration levels(6,8,10,12 m/s2)on the vibration of the hanging grape cluster.By the experiments,the peak hanging force of the grape cluster at the start,constant speed,and stop phase of the actuator was recorded using a single axis force sensor,and the cluster’s swing angle was measured with a digital camera.The experimental results showed a linear relationship between the swing angle and hanging force of the cluster at the start and stop phase of the actuator.The multi-stage cluster’s vibration during robotic transportation was observed,and the behavior of cycled damping after a sudden stop of the actuator was found.The simulated results of hanging force of grape cluster in damping phase were agreed with experimental results with R2 more than 0.90 at an optimum acceleration of 10 m/s2.To conclude,this research provides theoretical basics for understanding the complex vibration mechanism of the hanging cluster fruits during speedy robotic transportation operations with low-loss of berry drop both on industrial and farm levels. | Muhammad Faheem Jizhan Liu Guozheng Chang Ibrar Ahmad Yun Peng | 2021 | International Journal of Agricultural and Biological Engineering2021，14，4： | 0 |
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