This paper evaluates the potential of integrating textural and spectral information from unmanned aerial vehicle (UAV)-based multispectral imagery for improving quantification nitrogen (N) status in rice crops. Vegetation indices (VIs), normalized difference texture (NDTIs), their combination were used to estimate four N nutrition parameters leaf concentration (LNC), accumulation (LNA), plant (PNC), (PNA). Results demonstrated that red-edge index (NDRE) performed best estimating among all VI...

This work proposes an online collaborative hunting strategy for multi-robot systems based on obstacle-avoiding Voronoi cells in a complex dynamic environment. involves firstly designing the construction method using support vector machine (SVM) definition of buffered (BVCs). Based safe collision-free region robots, boundary weights between robots and obstacles are dynamically updated such that tangent to safety areas without intersecting with obstacles. Then, controlled move within their own...

This paper proposes a hybrid path planning and formation control strategy for multi-robots in dynamic environment. Under leader-follower structure, the followers can track motion of one leader after leader’s is determined. First, that contains global local investigated, which an improved grey wolf optimizer with whale algorithm (GWO-WOA) designed given map, meanwhile, window approach (DWA) fused to avoid obstacles. Then, proposed multiple mobile robots. The are controlled their corresponding...

Knee osteoarthritis (KOA) is one of the most popular joint diseases endangering human health because its high incidence, disability, and younger onset. However, there no suitable method for early diagnosis, evaluation, treatment KOA. In recent years, some clinical studies have found that ultrasound can detect changes in KOA advance, automatic segmentation images achieve rapid effective quantitative research on images, soft tissue boundaries lesion are blurred, making difficult. Although...

We consider the problem of tracking a dynamically-varying and unknown number targets in urban environments. Our proposed approach exploits available multipath measurements directly incorporates them into modified probability hypothesis density (PHD) filter to dynamically estimate both their corresponding parameters. The PHD multipath-to-measurement association (MMA) scheme that adaptively estimates best matched measurement return paths at each time step. It takes consideration target can...

The acoustic characteristics of underwater cylindrical Helmholtz resonator are analyzed theoretically. Based on the theories electro-acoustic analogy, a low frequency lumped-parameter model is constructed with due consideration effects elasticity and radiation impedance resonator. To our knowledge, this first time such complete constructed. input transfer function system given by circuit analysis. parameter values studied numerical method. Some useful conclusions drawn. A small aluminum...

Motion planning with the multi-robot system is complex and challenging in a dynamic environment unknown obstacles. This paper proposes two-stage motion strategy to guarantee formation of when they pass through some obstacle areas. First, constructed by leader-follower strategy. Then two-level algorithmic framework introduced optimize both global local path planning. A Self-adaptive Dynamic Window Algorithm (SDWA) proposed dynamically search optimal path, which aims balance speed safety...

We consider the particle probability hypothesis density filter (PPHDF) for tracking multiple targets in urban terrain. This is a filtering technique based on random finite sets, implemented using filter. Unlike data association methods, PPHDF can be modified to estimate both number of and their corresponding parameters. propose algorithm that employs multipath-to-measurement (PPHDF-MMA) automatically adaptively available types measurements. By best matched measurement at each time step, new...

A multi-model particle probability hypothesis density filer (PPHDF) algorithm for multiple target tracking in urban terrain is investigated this paper. The PPHDF based on state-space modeling of scenarios, random finite set theory, model estimation and sequential Monte Carlo implementations. Our proposed can instantaneously efficiently estimate both the number targets their corresponding states without conventional measurement-to-track associations. Numerical simulation results demonstrate...

This article analyzes CAD's computer-aided creative design by utilizing the landscape architecture's adversarial network.An intelligent structural optimization of has been constructed through an in-depth investigation generative networks.Compared to traditional methods, The generation scheme CAD a 3D effect image solution analyzing practicality clarity.It utilizes creation based on performance optimize clarity effects.While maintaining artistic value, algorithm proposed in this intelligently...

The positions and orientations of the tool workpiece are analyzed for machining axisymmetric aspheric concave surface position orientation matrixes obtained. relationship between is set up by using method coordinate transformation. basic modules necessary motions generating clarified. And possible structural configurations machine proposed optimized. results in this paper facilitate innovation design a surface.

Unmanned aerial vehicles (UAVs) can provide vision at high altitude. In this paper, multi-UAVs and ground vehicle are utilized to explore a complex environment with obstacles. The desired UAV formation is proposed around wider vision. Interfered Fluid Dynamical System (IFDS) method guide UAVs avoid obstacles, while the need be maintained. Then control scheme of updated combine IFDS according original obstacles avoidance. Simulation results shows that maintain during exploration.

This paper demonstrates a method for visual reconstruction and feature analysis of the surface morphology red swamp crayfish in CATIA (Computer Aided Three Dimensional Interactive Application) Microsoft Excel. Red crayfish, Procambarus clarkii, with efficient burrowing activities coupling propel pattern abdomen tail, was selected to study feasible methods living things. The digital measurements were carried out using three-dimensional laser scanner. Point clouds, scanning data processed by...

This paper presents iMask, a non-invasive and cost-effective wireless wearable respirator that measures breathing parameters in real time. The system consists of as well signal processing pipeline runs inside the respirator, provides Bluetooth Low Energy (BLE) interface for applications. By sensing airflow temperature at exhalation valve with NTC series resistors, each respiratory cycle can be measured regardless pathways through nose or mouth. iMask takes advantage voltage divider...

Microblog ranking is a hot research topic in recent years. Most of the related works apply TF-IDF metric for calculating content similarity while neglecting their semantic similarity. And most existing search engines which retrieve microblog list by string matching keywords not competent to provide reliable users when dealing with polysemy and synonym. Besides, treating all same authority topics intuitively ideal. In this paper, comprehensive strategy proposed. First, we extend conventional...