Abstract: Recently, the growing use of unmanned aerial vehicles (UAV) for pesticide application has been reported against a wide range crops with promising results in East Asian countries such as Japan, South Korea and China. This UAV-based technology agrochemicals is considered high efficiency alternative to conventional manual spray operations low-cost choice compared classical manned application. However, adoption rate designed optimal sprayer suitable drone small scale farm remains at...

In the last decade, unmanned aerial vehicle (UAV) sprayers have been growing rapidly worldwide as a new method for pesticide application, especially in Asian countries. More and more manufacturers service providers are currently aiming at UAV spraying operation fruit trees with higher economic value. We evaluated spray performance of an electric six-rotor sprayer using orchard mode (different application volumes flight patterns) hilly apple small sparse (SS) plain tall-spindle...

With the development of ecological irrigation area, a higher level detection and control categories for weeds are currently required. In this article, an improved transfer neural network based on bionic optimization to detect weed density crop growth is proposed, which used pre-trained AlexNet learning. Because learning rate new addition layer difficult tune best, weight bias newly added fully connected set with particle swarm (PSO) bat algorithm (BA) find optimal combination small data set....

This paper presents a robust finite frequency <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${H} _{\infty }$ </tex-math></inline-formula> control strategy for improving vibration performance and ride comfort of electric vehicles through in-wheel motor-active suspension system(IWM-ASS). Since the human body is much sensitive to vertical 4 -8 Hz, main objective dedicated deal with challenge that matches...

The Xinjiang Region in Northwest China is known as the “dust center” of Eurasian mainland. Dust on leaf surface affects overall plant development. While emphasis was studying impacts industrial dust particles crop development, effect natural deposition physiological parameters cotton had not been studied before. objective this study to examine effects deposits leaves and estimate their impact development yield. For purpose, an experiment set up having two treatments a control. In Treatment...

In recent years, unmanned aerial vehicles (UAVs) for plant protection have achieved rapid development in China. order to test and evaluate the performances of pesticides application status UAVs China, four typical UAV models were selected spraying coverage, penetrability, droplets density work efficiency. The results showed that deposition liquid coverage inconsistent both lateral longitudinal direction. Under condition similar amount spray volume operation parameters, median diameter (VMD)...

Automatic navigation (AN) is an essential component to ensure the safety of pesticide application in orchards, whereas precision variable-rate spraying (PVS) serves as indispensable technology for reducing pesticides and protecting environment. At present, AN PVS are not closely combined. In this case, a single three-dimension (3D) light detection ranging (LIDAR) sensor hereby adopted sense information fruit trees around robot determine region interest (ROI). Moreover, two-dimensional (2D)...

Driven by the demand for efficient plant protection in orchards, autonomous navigation system orchards is hereby designed and developed this study. According to three modules of unmanned “perception-decision-control,” environment perception map construction strategy based on 3D lidar constructed complex orchards. At same time, millimeter-wave radar further selected multi-source information fusion obstacles. The extraction orchard lines achieved formulating a four-step according obtained...

Pesticide application by unmanned agricultural aerial vehicles (UAVs) has rapidly developed in China and other Asian counties. Currently, tank-mix spray adjuvants are usually added into pesticide solutions to reduce drift facilitate droplet deposition control efficacy. The currently used all derived from conventional ground sprays, their mechanisms of action applications still unclear. In order clarify the spraying characteristics efficacy those performances various types were compared...

In this paper, the concept of symmetry is utilized in promising trajectory planning design autonomous ground vehicles—that is, construction and solution improved artificial potential field-based approach are symmetrical. Despite existing fields (APF) achievements on vehicles (AGV), applying traditional to dynamic traffic scenarios inappropriate without considering vehicle dynamics environment road regulations. This paper introduces a highly efficient for trajectories using (IAPF) handle...

Abstract BACKGROUND The use of unmanned aerial vehicles (UAVs) for the application plant protection products (PPPs) in paddy fields is becoming increasingly prevalent worldwide. Despite its growing usage, UAV spraying rice pest control faces practical challenges, including limited canopy penetration, uneven deposition, and significant spray drift. This study investigated impact two tank‐mix adjuvants, Wonderful Rosin (Adjuvant‐1) Tiandun (Adjuvant‐2), at six volume concentrations, on...

Chitinases play a vital part in the molting phase of insect pests. Inhibiting their activities by use drug-like small chemical molecules is thought to be an efficient strategy pesticide design and development. On basis crystal structure OfChtI, chitinase indispensable for pest Ostrinia furnacalis (Asian corn borer), here we report fragment five variant compounds as inhibitors OfChtI obtained from library over 200 000 chemicals structure-based-virtual-screening approach. The were synthesized...

Since the 2010s, unmanned aerial vehicle (UAV) sprayer was applied more and widely for low-volume pesticides spraying operations in China. However, droplets from UAV have a higher drift risk due to fine sprayed flight height than ground sprayers. Study on spray has been new hot spot within field of pesticide application technology. Most previous studies used direct methods drift, but meteorological conditions were unstable uncontrollable, research under an actual operation state wind tunnel...

Disease has always been one of the main reasons for decline apple quality and yield, which directly harms development agricultural economy. Therefore, precise diagnosis diseases correct decision making are important measures to reduce losses promote economic growth. In this paper, a novel Multi-scale Dense classification network is adopted realize 11 types images, including healthy diseased fruits leaves. The different kinds same disease with grades was accomplished. First all, solve problem...

Plant height of maize is related to lodging resistance and yield highly heritable but also polygenic, thus an important trait in breeding. Various manual methods exist determine the plant maize, yet they are labor-intensive time consuming. Therefore, we established digital surface models (DSM) based on RGB-images captured by unmanned aerial vehicle (UAV) at five different dates throughout growth period rapidly estimate 400 genotypes. The UAV-based estimation (PHUAV) was compared measurement...

Background: Unmanned Aerial Vehicles (UAVs) are increasingly being used commercially for crop protection in East Asia as a new type of equipment pesticide applications, which is receiving more and attention worldwide. A model pear cultivation called the ‘Double Primary Branches Along Row Flat Type’ standard trellised orchards (FT orchard) widely China, Japan, Korea, other Asian countries because it saves manpower suitable mechanization compared to traditional spindle open-center cultivation....

In the past decade, an unmanned aerial spraying system (UASS) was applied more and widely for low-volume pesticides operations in China. However, UASS have a higher drift risk due to fine droplets sprayed with working height faster driving speed than ground sprayers. Study on spray is new hot spot within field of pesticide application technology. The test bench originally designed measurement potential No methodology using evaluation reported. Based our previous study, measurements...

The stable detection and tracking of high-speed vehicles on the road by using LiDAR can input accurate information for decision-making module improve driving safety smart cars. This paper proposed a novel LiDAR-based robust vehicle method including three parts: point cloud clustering, bounding box fitting recognition. Firstly, aiming at problem clustering quality degradation caused uneven distribution clouds difference in radius between clusters traditional DBSCAN (TDBSCAN) obstacle...