An improved method to design compact pattern reconfigurable pixel antennas is described. The introduces a new structure consisting of diagonal connections between pixels enhance the steering capability antennas. These increase number independent degrees freedom available in process which results significantly performance when compared designs with only horizontal and vertical pixels. Furthermore, structures enable possible formation "cross-over" provide that allows currents cross each other...

This article addresses the modeling and control of heterogeneous populations thermostatically controlled loads (TCLs) operated by model predictive (MPC) schemes at level each TCL. It is shown that dynamics such TCLs can be described a pair Fokker-Planck equations coupled via actions in domain. The technique input-output feedback linearization used design aggregate power control, which leads to nonlinear system closed loop. Well-posedness analysis carried out validate developed scheme....

With the development of e-commerce, last-mile delivery has become a significant part customers’ shopping experience. In this paper, an autonomous method using multiple unmanned ground vehicles is investigated. Being smart logistics service, it provides promising solution to reduce cost, improve efficiency, and avoid spread airborne diseases, such as SARS COVID-19. By cooperation strategy with heterogeneous robots, contactless parcel can be carried out within apartment complexes efficiently....

The localization problem for multi-robot teams has been extensively studied with the goal of obtaining precise positioning information, such as required by a variety robotic applications. This paper proposes dynamic approach that exploits multiple robots equipped range-only ultrawideband sensors to create and maintain common self-adaptive coordinate system. For 2-D localization, we use three relative range measurements build global We recursively apply an extended Kalman filter, which...

Avionics Full Duplex Switched Ethernet (AFDX) is a standard proposed to implement deterministic networks by providing predictable performance guarantees. The determinism enforced through the concept of Virtual Link, which defines logical unidirectional connection between end systems. Although an upper bounded end-to-end delay can be obtained using analysis based on, e.g., network calculus, frame arrival uncertainty in destination End-System source nondeterminism that introduces problem with...

Avionics Full Duplex Switched Ethernet is a safety critical network in which redundancy management mechanism employed to enhance the reliability of network. However, as stated ARINC664-P7 standard, there still exists potential problem, may fail redundant transmissions due sequence inversion channels. In this paper, we explore phenomenon and provide its mathematical analysis. It revealed that variable jitter transmission latency difference between two successive frames are main sources...

In this paper, we seek to provide unmanned ground vehicles with positioning service using ultrawideband (UWB) technology, a high-accuracy approach. UWB is chosen for two distinct reasons. First, it does not rely on global navigation satellite systems like GPS, making able be applied indoors or in an environment where GPS signal unstable. Second, immune interference from other signals and accurate enough guide moving precisely complex within narrow road. three base stations are aggregated as...

As China's aging population increases, falls have become a common health problem among the elderly. Therefore, fall detection has an important research direction relating to elderly problems. In this article, we propose low-cost smart home detecting and monitoring system based on YCL(YOLO V3 combined with LiteFlowNet) algorithm multi-sensor fusion. On one hand, behavior of is monitored by using YCL detect activities. other fusion applied embedded sensors smartphone-i.e., acceleration air...

A genetic multi-robot path planning (GMPP) algorithm is proposed to rationalize the of multi-robots in multi-obstacle scenarios, especially large and complex environments with length constraints safety feasibility. On basis ensuring safety, GMPP uses shortest as objective function. Secondly, considers task execution problem avoid collisions a shared working environment. As result, introduces central planner make collision-free driving between multiple robots through two mechanisms: collision...

iOS operating system for Apple and Android Samsung, Huawei other worldrenowned mobile phone manufacturers are representing the fashion trend of development also leading technology. However, due to restriction time synchronization strategy server functionality, both platform not provided with function high precision NTP network timing. In this paper, on basis advanced computer language JAVA Xcode, software platforms produced. The simulation results simulator show that: platform, mean value...

This paper addresses the load balancing problem, which is one of key issues in high-performance computing (HPC) platforms. A novel method, called decentralized active queue management (DAQM), proposed to provide a fair task distribution heterogeneous environment for HPC An implementation DAQM presented, consists an ON-OFF control and utility maximization-based coordination scheme. The stability scheme convergence algorithm maximization have been assessed by rigorous analysis. To demonstrate...

The aim of this paper is to mitigate the problem high power demand peak and load oscillations in operation a large population thermostatically controlled loads (TCLs) operated by model predictive control (MPC) at TCL level. Two desynchronized MPC schemes are introduced: 1) adding random delays reference signals 2) extra penalizations on objective functions. For characterizing validating proposed desynchronization schemes, partial differential equation (PDE) developed represent evolution...

In this article, we propose a controller that can coordinate swarm of robots to cover region persistently by forming mobile sensor network. Therefore, the robot monitor large area interest (AOI) over long time. The performance achieve high flexibility and coverage efficiency with intelligence. This method is inspired behavior predators, such as lions use liquid markers containing pheromones mark their territories indicate status. Via interactions based on these clues, ecosystem dynamic...

The paper makes a brief introduction of Multiple Carrier-Code Division Access (MC-CDMA) scheme based on the principles Orthogonal Frequency Multiplexing (OFDM) and CDMA, mathematical model uplink is established in MC-CDMA system.The simulation research different multi-user detection methods system implemented by using MATLAB software, it also compares impacts to performance several methods, such as De-Correlation (DEC) detection, Minimum Mean Square Error (MMSE) Parallel Interference...

In recent years, with the increasing number of artificial intelligence and deep learning algorithms applications, reinforcement learning, as a branch machine has shown its advantages over other in highly complex environments, including famous events such AlphaGo defeating human chess players. Various branches experimental environments have been developed for research. Reinforcement multi-agent are applied this paper. The algorithm MAPPO proposed reward function is validated under Neural MMO...

This paper combines the deep learning technology and side-channel analysis method to achieve effective cross-technology for ECC Curve-25519 algorithm on an STM32F407 (ARM-CortexM4) chip. The implementation of target algorithm, which is protected with point randomization constant-time operations (Montgomery powering ladder), uses security countermeasures. Therefore, explores leakages from memory-related (conditional swap), happen before each addition or doubling operation. used determine...

The main focus of the dominant technologies in high performance computation (HPC) market, such as GPU and multicore systems, is put on processing power, while much less attention has been paid to communication delays inside hybrid architectures. To fill this gap, paper presents an experimental study Intel's Broadwell Xeon processor with integrated Arria 10 FPGA capabilities characterize between CPUs FPGA, using both low latency cache coherent interface two PCIe links offered by platform....

with the parallelism of task implementation, spatial distribution, well system fault tolerant capability and scalability, multi-agent are widely used in many fields. The synchronization control technology has been becoming a hot research at home abroad. This paper set up unified time frequency models both homogenous heterogeneous-agent, to explore expression multivariate consistency problem. In addition, exploring received signal strength (RSS) based algorithm can enlarge action range...

With the development of technology, positioning systems have shifted from outdoor to indoor and low precision high precision. The has put forward greater demands on many applications including robot navigation. Aiming at improving accuracy, cost, stability localization, this paper proposed a single base station approach for robots based fusion UWB, IMU, encoder sensors. combination several sensors, that carry UWB tags can achieve accuracy localization well robustness in an environment. It...

Nowadays, agricultural production needs to improve the quality and yield of crops by monitoring their growth environment. The locations have characteristics wide distribution, high density, large quantity. Thus, a networking method suitable for environmental is required. LoRa wireless communication technology has advantages long range strong diffraction ability, while its date rate low. NRF24L01P single-chip transceiver working in 2.4 2.5 GHz ISM band. It data rate, low energy consumption...