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| 1 | Porous Graphene Microflowers for High-Performance Microwave Absorption显示文摘Graphene has shown great potential in microwave absorption(MA) owing to its high surface area, low density,tunable electrical conductivity and good chemical stability.To fully realize graphenes& MA ability, the microstructure of graphene should be carefully addressed. Here we prepared graphene microflowers(Gmfs) with highly porous structure for high-performance MA filler material. The efficient absorption bandwidth(reflection loss B-10 dB) reaches 5.59 GHz and the minimum reflection loss is up to -42.9 dB, showing significant increment compared with stacked graphene. Such performance is higher than most graphene-based materials in the literature. Besides, the low filling content(10 wt%) and low density(40–50 mg cm^(-3))are beneficial for the practical applications. Without compounding with magnetic materials or conductive polymers,Gmfs show outstanding MA performance with the aid of rational microstructure design. Furthermore, Gmfs exhibit advantages in facile processibility and large-scale production compared with other porous graphene materials including aerogels and foams. | Chen Chen Jiabin Xi Erzhen Zhou Li Peng Zichen Chen Chao Gao | 2018 | Nano-Micro Letters2018，10，2： | 20 |
| 2 | Coupling effects of tungsten and molybdenum on microstructure and stress-rupture properties of a nickel-base cast superalloy显示文摘In order to comprehensively understand the forming mechanism of abnormal phases solidified in a nickel-base cast superalloy with additives of tungsten and molybdenum, the coupling effects of W and Mo on the microstructure and stress-rupture properties were investigated in this paper. The results indicated that the precipitation of primary α-(W, Mo) phase depended tremendously on the amount of W and Mo addition. When the total amount of W and Mo was greater than 5.79 at%, α-(W, Mo) phase became easily precipitated in the alloy.With increasing of Mo/W ratio, the dendrite-like α-(W, Mo) phases were apt to convert into small bars or blockylike phases at the vicinities of γ′/γ eutectic. The morphological changes of α-(W, Mo) phase can be interpreted as the non-equilibrium solidification of W and Mo in the alloy. Since the large sized α-(W, Mo) phase has detrimental effects on stress-rupture properties in as-cast conditions, secondary cracks may mainly initiate at and then propagate along the interfaces of brittle phases and soft matrix. During exposing at 1100 ℃ for 1000 h, the α-(W, Mo) phases transformed gradually into bigger and harder M_6C carbide, which results in decreasing of stress-rupture properties of the alloy. Finally, the alloy with an addition of 14W-1Mo(wt%) maintained the longest stress lives at high temperatures and therefore it revealed the best microstructure stability after 1100 ℃/1000 h thermal exposure. | Tongjin Zhou Wei Feng Huibin Zhao Yu Meng Huaxia Zhang Hongsheng Ding Zichen Wang | 2018 | Progress in Natural Science:Materials International2018，28，1： | 7 |
| 3 | AED-Net:An Abnormal Event Detection Network显示文摘It has long been a challenging task to detect an anomaly in a crowded scene.In this paper,a selfsupervised framework called the abnormal event detection network(AED-Net),which is composed of a principal component analysis network(PCAnet)and kernel principal component analysis(kPCA),is proposed to address this problem.Using surveillance video sequences of different scenes as raw data,the PCAnet is trained to extract high-level semantics of the crowd’s situation.Next,kPCA,a one-class classifier,is trained to identify anomalies within the scene.In contrast to some prevailing deep learning methods,this framework is completely self-supervised because it utilizes only video sequences of a normal situation.Experiments in global and local abnormal event detection are carried out on Monitoring Human Activity dataset from University of Minnesota(UMN dataset)and Anomaly Detection dataset from University of California,San Diego(UCSD dataset),and competitive results that yield a better equal error rate(EER)and area under curve(AUC)than other state-of-the-art methods are observed.Furthermore,by adding a local response normalization(LRN)layer,we propose an improvement to the original AED-Net.The results demonstrate that this proposed version performs better by promoting the framework’s generalization capacity. | Tian Wang Zichen Miao Yuxin Chen Yi Zhou Guangcun Shan Hichem Snoussi | 2019 | Engineering2019，5，5： | 2 |
| 4 | Bioresponsive nanotherapy for preventing dental caries by inhibiting multispecies cariogenic biofilms显示文摘Early childhood caries(ECC)is a public healthcare concern that greatly reduces the quality of life of young children.As a leading factor of ECC,cariogenic biofilms are composed of acidogenic/aciduric pathogens and extracellular polysaccharides(EPSs),creating an acidic and protected microenvironment.Antimicrobial photodynamic therapy(aPDT)is a noninvasive,painless,and efficient therapeutic approach that is suitable for treating ECC.However,due to the hyperfine structure of cariogenic biofilms,most photosensitizers(PSs)could not access and penetrate deeply in biofilms,which dramatically hamper their efficiency in the clinic.Herein,bioresponsive nanoparticle loaded with chlorin e6(MPP-Ce6)is developed,which largely increases the penetration depth(by over 75%)and retention(by over 100%)of PS in the biofilm compared with free Ce6.Furthermore,MPP-Ce6-mediated aPDT not only kills the bacteria in preformed biofilms but also inhibits multispecies biofilm formation.A rampant caries model is established to mimic ECC in vivo,where the population of cariogenic bacteria is decreased to 10%after MPP-Ce6-mediated aPDT.Importantly,the number and severity of carious lesions are efficiently reduced via Keyes’scoring and micro-CT analysis.This simple but effective strategy can serve as a promising approach for daily oral hygiene in preventing ECC. | Danfeng Liu Xianbin Ma Yaoting Ji Rourong Chen Shuhui Zhou Hantao Yao Zichen Zhang Mengjie Ye Zhigang Xu Minquan Du | 2022 | Bioactive Materials2022，7，8： | 2 |
| 5 | Novel directions of precision oncology:circulating microbial DNA emerging in cancer-microbiome areas显示文摘Microbiome research has extended into the cancer area in the past decades.Microbes can affect oncogenesis,progression,and treatment response through various mechanisms,including direct regulation and indirect impacts.Microbiota-associated detectionmethods and agents have been developed to facilitate cancer diagnosis and therapy.Additionally,the cancermicrobiome has recently been redefined.The identification of intra-tumoral microbes and cancer-related circulating microbial DNA(cmDNA)has promoted novel research in the cancer–microbiome area.In this review,we define the human system of commensal microbes and the cancer microbiome from a brand-new perspective and emphasize the potential value of cmDNA as a promising biomarker in cancer liquid biopsy.We outline all existing studies on the relationship between cmDNA and cancer and the outlook for potential preclinical and clinical applications of cmDNA in cancer precision medicine,as well as critical problems to be overcome in this burgeoning field. | Liting You Juan Zhou Zhaodan Xin J.Spencer Hauck Feifei Na Jie Tang Xiaohan Zhou Zichen Lei Binwu Ying | 2022 | Precision Clinical Medicine2022，5，1： | 2 |
| 6 | Study and performance test of full complement cycloid ball reducer with ceramic ball as its gear teeth显示文摘 | Zhou Jianjun Chen Zichen | 2001 | Chinese Journal of Aeronautics2001，14，4： | 1 |
| 7 | Discharge rate consistency of each channel for UAV-based pneumatic granular fertilizer spreader显示文摘Unmanned aerial vehicles(UAVs)are widely being used to spread granular fertilizer in China.Granular fertilizer spreaders equipped with UAVs are mainly centrifugal disc-type and pneumatic.The multichannel pneumatic granular fertilizer spreaders(MPGFSs)have a banded fertilizer deposition distribution pattern,which are more suitable for variable rate fertilization with high precision requirement than the circular deposition distribution pattern of disc-type granular fertilizer spreaders(DGFSs).However,the existing MPGFS has the disadvantage of inconsistent discharge rate of each channel,which affects the uniformity of fertilization.In order to explore the causes of inconsistent discharge rate of each channel,the discrete element method(DEM)and bench test were performed to analysis the discharge process of the fluted roller fertilizing apparatus and distribution of fertilizer in axial direction of fluted roller.The computational fluid dynamics(CFD)was used to simulate the airflow field of pneumatic system to analyze the influence of airflow on the movement of fertilizer particles.The simulation results of the discharge process of the fluted roller fertilizing apparatus showed that the filling velocity at the axial ends of the fluted roller fertilizing apparatus was lower than that of the middle.The reason was that the filling capacity was weak near the wall.The simulated results of the airflow field without partitions showed that the airflow provided by the axial flow fan was rotational,and this caused the particles to move irregularly in the throat,resulting in inconsistency discharge rate of each channel.Based on the analysis of reasons of inconsistent discharge rate of each channel,a MPGFS with partitions in the throat was developed.The discharge rate bench tests were carried out to optimize the partition spacing parameters,and fertilization test was performed to test the performance of the improved MPGFS.The discharge rate test results showed better consistency with partition.The coefficient of variation(CV)of the discharge rate of each channel was 20.16%without the partition and 7.70%with the optimal partition.The fertilizer spreading uniformity bench test results shown that the CV of spreading uniformity of MPGFS without partitions was 15.32%,and that MPGFS with partitions was 8.69%.The partitions design was beneficial to improve the consistency of each channel discharge rate and the uniformity of fertilization.The finding can provide a strong reference to design the MPGFS. | Xunwei Wang Rui Jiang Zhiyan Zhou Cancan Song Xiwen Luo Ruifeng Bao Zichen Lyu Junhao Huang Jianqin Lin | 2023 | International Journal of Agricultural and Biological Engineering2023，16，4： | 1 |
| 8 | Disease resistance conferred by components of essential chrysanthemum oil and the epigenetic regulation of OsTPS1显示文摘The sesquiterpene alpha-bisabolol is the predominant active ingredient in essential oils that are highly valued in the cosmetics industry due to its wound healing,anti-inflammatory,and skin-soothing properties.Alpha-bisabolol was thought to be restricted to Compositae plants.Here we reveal that alpha-bisabolol is also synthesized in rice,a non-Compositae plant,where it acts as a novel sesquiterpene phytoalexin.Overexpressing the gene responsible for the biosynthesis of alpha-bisabolol,Os TPS1,conferred bacterial blight resistance in rice.Phylogenomic analyses revealed that alpha-bisabolol-synthesizing enzymes in rice and Compositae evolved independently.Further experiments demonstrated that the natural variation in the disease resistance level was associated with differential transcription of Os TPS1 due to polymorphisms in its promoter.We demonstrated that Os TPS1 was regulated at the epigenetic level by JMJ705 through the methyl jasmonate pathway.These data reveal the cross-family accumulation and regulatory mechanisms of alpha-bisabolol production. | Chuansong Zhan Long Lei Hao Guo Shen Zhou Congping Xu Zixin Liu Zichen Wu Yuan Deng Yuanyuan Miao Yu Han Meng Zhang Hua Li Sishu Huang Chenkun Yang Feng Zhang Yufei Li Ling Liu Xianqing Liu Hafiz Muhammad Khalid Abbas Alisdair R.Fernie Meng Yuan Jie Luo | 2023 | Science China(Life Sciences)2023，66，5： | 1 |
| 9 | 深水支持平台火灾定量风险评估显示文摘The living area of an offshore platform is the main living place for operators in offshore oil and gas fields.Fire risk assessment plays an important role in the safety of personnel in offshore platforms.In this paper,a fire risk assessment mathematical model for offshore platfoms is proposed based on a comprehensive safety assessment method.The concept of danger time is presented according to the evaluation criteria of safe evacuation.The fire risk of offshore platforms is assessed by combining probability statistics with numerical simulation.The fire risk is quantitatively assessed by using an N500 deep water semi-submersible support platform as an example.According to the FN curve,fire frequency,fire escalation probability,and casualty probability,the rationality of marine general layout is analyzed,and the general layout design could be optimized to reduce the fire risk. | Haipeng Zhang Zichen Zhou Miao Chen Difei Yi | 2021 | Journal of Marine Science and Application2021，20，2： | 1 |
| 10 | Creative Design of Mov- able Tooth Gear Drives显示文摘 | Zhou Jianjun Chen Zichen | 2004 | Chinese Journal of Me- chanical Engineering ( English Edition)2004，17，5： | 1 |
| 11 | TRANSIENT THERMAL RESPONSE IN THICK ORTHOTROPIC HOLLOW CYLINDERS WITH FINITE LENGTH:HIGH ORDER SHELL THEORY显示文摘The transient thermal response of a thick orthotropic hollow cylinder with finite length is studied by a high order shell theory.The radial and axial displacements are assumed to have quadratic and cubic variations through the thickness,respectively.It is important that the radial stress is approximated by a cubic expansion satisfying the boundary conditions at the inner and outer surfaces,and the corresponding strain should be least-squares compatible with the strain derived from the strain-displacement relation.The equations of motion are derived from the integration of the equilibrium equations of stresses,which are solved by precise integration method(PIM).Numerical results are obtained,and compared with FE simulations and dynamic thermo-elasticity solutions,which indicates that the high order shell theory is capable of predicting the transient thermal response of an orthotropic(or isotropic) thick hollow cylinder efficiently,and for the detonation tube of actual pulse detonation engines(PDE) heated continuously,the thermal stresses will become too large to be neglected,which are not like those in the one time experiments with very short time. | Jiaxi Zhou Zichen Deng Xiuhui Hou | 2010 | Acta Mechanica Solida Sinica2010，23，2： | 1 |
| 12 | CENP-A的Ser68位动态磷酸化调控它在着丝粒区域的细胞周期依赖性装配显示文摘细胞出版社《发育细胞》创刊于2001年,本刊致力于搭建细胞生物学与发育生物学两大学科之间的桥梁。受过专业博士训l练的科学编辑与作者、审稿人、编委会成员共同合作,及时发布横跨两个领域令人振奋的研究成果,强调两个领域之间共同面临的问题以及相互之间的关系。该杂志2015年公布的影响因子为9.708。 | Zhouliang Yu Xiang Zhou Wenjing Wang Wenqiang Deng Junnan Fang Hao Hu Zichen Wang Shangze Li Lei Cui Jing Shen Linhui Zhai Shengyi Peng Jiemin Wong Shuo Dong Zengqiang Yuan Guangshuo Ou Xiaodong Zhang Ping Xu Jizhong Lou Na Yang Ping Chen Rui-Ming Xu 李国红 | 2016 | 科学新闻2016，0，1： | 1 |
| 13 | Laser tracking leader-follower automatic cooperative navigation system for UAVs显示文摘Currently,small payload and short endurance are the main problems of a single UAV in agricultural applications,especially in large-scale farmland.It is one of the important methods to solve the above problems of UAVs by improving operation efficiency through multi-UAV cooperative navigation.This study proposed a laser tracking leader-follower automatic cooperative navigation system for multi-UAVs.The leader in the cluster fires a laser beam to irradiate the follower,and the follower performs a visual tracking flight according to the light spot at the relative position of the laser tracking device.Based on the existing kernel correlation filter(KCF)tracking algorithm,an improved KCF real-time spot tracking method was proposed.Compared with the traditional KCF tracking algorithm,the recognition and tracking rate of the optimized algorithm was increased from 70%to 95%in indoor environment,and was increased from 20%to 90%in outdoor environment.The navigation control method was studied from two aspects:the distance coordinate transformation model based on micro-gyroscope and navigation control strategy.The error of spot position was reduced from the maximum(3.12,−3.66)cm to(0.14,0.12)cm by correcting the deviation distance of the spot at different angles through a coordinate correction algorithm.An image coordinate conversion model was established for a complementary metal-oxide-semiconductor(CMOS)camera and laser receiving device at different mounting distances.The laser receiving device was divided into four regions,S0-S3,and the speed of the four regions is calculated using an uncontrollable discrete Kalman filter.The outdoor flight experiments of two UAVs were carried out outdoors using this system.The experiment results show that the average flight error of the two UAVs on the X-axis is 5.2 cm,and the coefficient of variation is 0.0181.The average flight error on the Z-axis is 7.3 cm,and the coefficient of variation is 0.0414.This study demonstrated the possibility and adaptability of the developed system to achieve multi-UAVs cooperative navigation. | Rui Ming Zhiyan Zhou Zichen Lyu Xiwen Luo Le Zi Cancan Song Yu Zang Wei Liu Rui Jiang | 2022 | International Journal of Agricultural and Biological Engineering2022，15，2： | 0 |
| 14 | Do methylenetetrahydrofolate dehydrogenase, cyclohydrolase, and formyltetrahydrofolate synthetase 1 polymorphisms modify changes in intelligence of school-age children in areas of endemic fluorosis?显示文摘Background: Excessive exposure to fluoride can reduce intelligence. Methylenetetrahydrofolate dehydrogenase, cyclohydrolase, and formyltetrahydrofolate synthetase 1 (MTHFD1) polymorphisms have important roles in neurodevelopment. However, the association ofMTHFD1 polymorphisms with children’s intelligence changes in endemic fluorosis areas has been rarely explored.Methods: A cross-sectional study was conducted in four randomly selected primary schools in Tongxu County, Henan Province, from April to May in 2017. A total of 694 children aged 8 to 12 years were included in the study with the recruitment by the cluster sampling method. Urinary fluoride (UF) and urinary creatinine were separately determined using the fluoride ion-selective electrode and creatinine assay kit. Children were classified as the high fluoride group and control group according to the median of urinary creatinine-adjusted urinary fluoride (UFCr) level. Four loci ofMTHFD1 were genotyped, and the Combined Raven’s Test was used to evaluate children’s intelligence quotient (IQ). Generalized linear model and multinomial logistic regression model were performed to analyze the associations between children’s UFCr level,MTHFD1 polymorphisms, and intelligence. The general linear model was used to explore the effects of gene-environment and gene-gene interaction on intelligence.Results: In the high fluoride group, children’s IQ scores decreased by 2.502 when the UFCr level increased by 1.0 mg/L (β= –2.502, 95% confidence interval [CI]: –4.411, –0.593), and the possibility for having 'excellent' intelligence decreased by 46.3% (odds ratio = 0.537, 95% CI: 0.290, 0.994). Children with the GG genotype showed increased IQ scores than those with the AA genotype of rs11627387 locus in the high fluoride group (P < 0.05). Interactions between fluoride exposure andMTHFD1 polymorphisms on intelligence were observed (Pinteraction < 0.05).Conclusion: Our findings suggest that excessive fluoride exposure may have adverse effects on children’s intelligence, and changes in children’s intelligence may be associated with the interaction between fluoride andMTHFD1 polymorphisms. | Zichen Feng Ning An Fangfang Yu Jun Ma Na Li Yuhui Du Meng Guo Kaihong Xu Xiangbo Hou Zhiyuan Li Guoyu Zhou Yue Ba | 2022 | Chinese Medical Journal2022，，15： | 0 |
| 15 | Ultrasensitive room-temperature geranyl acetone detection based on Fe@WO_(3−x) nanoparticles in cooked rice flavor analysis显示文摘In the assessment of food quality,geranyl acetone plays a crucial role as a volatile organic compound(VOC)biomarker for diverse agricultural products,while the ultralow concentration detection meeting application requirements has been barely studied.Herein,an iron(Fe)-doped WO_(3−x) gas sensor was employed for greatly sensitive,selective,and scalable geranyl acetone detection.The results proved that precisely-regulated oxygen vacancy(OV)and sophisticatedly-active electron transition of Fe-doped WO_(3−x) nanoparticles were fulfilled by modifying the doping amount of Fe^(3+),leading to the prominently enhanced sensitivity(23.47 at 6 ppm),low limit of detection(LOD)(237 ppb),optimal selectivity,and outstanding long-term stability.Furthermore,the enhancing mechanism of gas sensing performance was substantiated through density functional theory(DFT)calculation,while the practical application for the evaluation of spoiled cooked rice was conducted as well.This study demonstrates a reliable method for detecting a VOC biomarker in cooked rice,which can ensure food security and improve palatability of cooked rice. | Zichen Zheng Kewei Liu Yiwen Zhou Marc Debliquy Chao Zhang | 2023 | Journal of Advanced Ceramics2023，12，8： | 0 |
| 16 | Measuring the Capability of Biological Incident Rescue Teams in China:A Fuzzy Analytic Hierarchy Process Based Model-Tianjin Municipality,China,2022-2023显示文摘Introduction:The swift advancement of biotechnology has presented both opportunities and challenges to our society,thrusting biosafety to the forefront of concern.Consequently,the evaluation of rescue capabilities in the event of a bioterrorism incident becomes of paramount importance.Currently,there is a notable absence of specific measurement criteria and a comprehensive evaluation system.This paper aims to establish a systematic approach towards assessing emergency response capabilities in the context of bioterrorism incidents.Methods:We employed an enhanced Delphi methodology to establish an index evaluation framework.Subsequently,the weight of the judgment matrix was ascertained via the application of the fuzzy comprehensive evaluation approach.This led to the creation of a fuzzy comprehensive evaluation model for bioterrorism rescue capability.Results:A modified Delphi study was conducted involving 11 experts across two rounds,achieving a response rate of 100%.The Kendall coordination coefficients recorded in the first and second rounds were 0.303 and 0.632,respectively(P<0.05).Upon comprehensive analysis involving score,coefficient of variation,and full score ratio,we distinguished five primary indicators and 25 secondary indicators.Subsequently,an evaluation model was developed based on the Analytic Hierarchy Process(AHP)tailored to assess the response to a rescue from bioterrorism.Discussion:The expert panel confirmed consensus on all aspects of the model,validating its comprehensive content.The succeeding course of action involves converting the assessment model to a measurable scale,affirming its functionality,and implementing it in practical evaluation tasks to further enhance the capabilities of the biological incident rescue team. | Zichen Zhou Lulu Yao Shike Hou Yan Zhou Chao Zhao Song Bai Nan Li Tiantian Li Yongzhong Zhang | 2023 | China CDC weekly2023，5，41： | 0 |
| 17 | Recent advances of mechanosensitive genes in vascular endothelial cells for the formation and treatment of atherosclerosis显示文摘Atherosclerotic cardiovascular disease and its complications are a high-incidence disease worldwide.Numerous studies have shown that blood flow shear has a huge impact on the function of vascular endothelial cells,and it plays an important role in gene regulation of pro-inflammatory,pro-thrombotic,pro-oxidative stress,and cell permeability.Many impor-tant endothelial cell mechanosensitive genes have been discovered,including KLK10,CCN gene family,NRP2,YAP,TAZ,HIF-1α,NF-kB,FOS,JUN,TFEB,KLF2/KLF4,NRF2,and ID1.Some of them have been intensively studied,whereas the relevant regulatory mechanism of other genes remains unclear.Focusing on these mechanosensitive genes will provide new strategies for therapeutic intervention in atherosclerotic vascular disease.Thus,this article reviews the mechanosensitive genes affecting vascular endothelial cells,including classical pathways and some newly screened genes,and summarizes the latest research progress on their roles in the pathogenesis of atherosclerosis to reveal effective therapeutic targets of drugs and provide new insights foranti-atherosclerosis. | Shuyu Li Zichen Xu Yi Wang Lizhao Chen Xiangxiu Wang Yanghao Zhou Daoxi Lei Guangchao Zang Guixue Wang | 2024 | Genes & Diseases2024，11，3： | 0 |
| 18 | Zeolite-based Fenton-like catalysis for pollutant removal and reclamation from wastewater显示文摘Wastewater treatment and reclamation from wastewater are essential for the sustainable use of water resource.Zeolite-based heterogeneous catalysis shows great potential in circumventing the current limitations on pollutant removal and transformation to useful chemicals,inspiring advancements towards practical water treatment.This paper summarizes the methods for synthesizing zeolite-based catalyst,and the corresponding advantages and disadvantages.In comparison with traditional Fenton-like reaction,the superiority of zeolite-based catalysis lies in less sludge,wide pH range and easy recyclability.Accordingly,applications of zeolite-based Fenton-like catalysis(ZFCs)in pollutant removal and reclamation of wastewater were reviewed.Emphasis was placed on the methodological strategies in improving ZFCs,including the combination of external driving force(e.g.,photocatalysis or electrochemistry),as well as the introduction of various transition metals into zeolite-based catalyst.Possible challenges and future perspectives for ZFCs were proposed. | Zichen Shangguan Xingzhong Yuan Longbo Jiang Yanlan Zhao Lei Qin Xuerong Zhou Yan Wu Jia Wei Chew Hou Wang | 2022 | Chinese Chemical Letters2022，33，11： | 0 |
| 19 | Development of UAV-based shot seeding device for rice planting显示文摘In order to realize the high-quality row seeding operation with unmanned aerial vehicle(UAV)in paddy field,a shot seeding device that can sow five rows of pelleted rice seeds at the same time was designed.The shot seeding device mainly consists of an external grooved wheel seed metering device and five shot seeding modules.The designed external grooved wheel seed metering device can take the seeds out of the seed box and divide the seeds into five parts.The shot seeding module can accelerate the pelleted rice seeds to reduce the impact of the UAV wind on the direction of seed movement.Furthermore,an angle adjustment mechanism for the shot seeding module was used to change the row spacing.The seed metering device test verified that when the speed of the seed metering wheel was 15 r/min,the coefficient of variation of the discharge rate of each row(C.V1)and total seed discharge rate stability(C.V2)were 1.70%and 1.04%,respectively.Image processing technique was used to test the UAV seeding performance.The distribution characteristics of seeds on the ground showed that the number of seeds in each row gradually increased from both sides to the middle in the width direction.According to the statistics,there were 60%-70%of the seeds in each row in the 100 mm width range.The field test showed that when the working height was 1.5 m and the seeding quantity was 38.56 kg/hm^(2),the performance of sowing in rows was obvious,the deviation rate of seeding quantity was 1.89%.After 16 d of sowing,the seeds’emergence rate was stable,and the average emergence rate was 82.63%and the yield was 6775.50 kg/hm^(2). | Wei Liu Shuaishuai Zou Xuelang Xu Qingyu Gu Weizhuo He Jun Huang Junhao Huang Zichen Lyu Jianqin Lin Zhiyan Zhou Rui Jiang Xiwen Luo | 2022 | International Journal of Agricultural and Biological Engineering2022，15，6： | 0 |
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