Smartphone recycling is a heated topic recently because of environmental and economical concerns. However, the limited recognition ability of naked eyes to find defects on phones impedes further growth of the second-h...
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Mobile robots have broad application prospects in military, industrial, agricultural, commercial, transportation, and logistics fields. The core problem of mobile robot lies in the autonomous navigation ability of mob...
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In this paper, a priority based adaptive MAC protocol (PM-MAC) is proposed for UAV ad hoc networks. Firstly, in the protocol, the arriving packets are classified into different queues according to the priority of serv...
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Today's science and technology develop rapidly with the passage of time. In the highly competitive environment, everyone's time is twenty-four hours a day. No one can have more than one minute. Or less have a ...
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ISBN:
(纸本)9781728166513
Today's science and technology develop rapidly with the passage of time. In the highly competitive environment, everyone's time is twenty-four hours a day. No one can have more than one minute. Or less have a minute to go, so if you want to improve your competitiveness, efficient scheduling time is very important, people's daily needs for efficiency are also growing. In the process of moving these vehicles, how to move the same distance with others in less time, this demand and efficiency can also be seen from the tools we now use to produce vehicles (such as tricycles).In the high-precision control system design of the self-balancing vehicle of the tricycle vehicle, in addition to the high-precision inclination sensor to measure the dynamic inclination angle, the steering control has an absolute value encoder to learn the angle of the steering of the tricycle body. More importantly, in addition to the rear axle drive system on the wheel of the tricycle body itself, we also installed a stepper motor to control the balance of the tricycle body, so that the tricycle body can be at a higher speed. Under the steady steering, the tricycle body will not roll *** attitude measurement is a very important aspect in the design of high-precision control systems for self-balancing vehicles of tricycle vehicles. Because the motor is an open-loop system, we need to use the tilt sensor for attitude measurement to obtain high-precision angle values, and the obtained angle value and the motor form a closed-loop control system to achieve more precise motor control to control the tricycle body. balance. So we need to measure the angle change very accurately, because a single axial attitude tilt sensor can't meet our requirements, and because there are too many shortcomings, we can't get more accurate values in a dynamic environment, so we use A six-axis sensor that helps us get better precision and precision. Finally, we use the VEKF-based algorithm to eliminate the numerical
The seismic signals of two typical types of vehicle targets—wheeled vehicles and tracked ones—were collected in field test, and decomposed at multiple levels using wavelet packet transformation (WPT), which has a mu...
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A dual-band broadband conical beam antenna operating at Ku-/ Ka-band is presented in this paper. The proposed antenna adopts a novel across-layer folded structure which consists of two substrates. A circular patch wit...
A dual-band broadband conical beam antenna operating at Ku-/ Ka-band is presented in this paper. The proposed antenna adopts a novel across-layer folded structure which consists of two substrates. A circular patch with coupling slot is printed on the lower substrate as a monopole at Ku-band, and a circular patch and a loop patch are printed on the upper substrate to achieve operating at Ka-band. A wideband performance is obtained by introducing shorting vias to excite TM 01 and TM 02 mode in both bands. The simulation results show that the proposed antenna operates at 11.74 GHz-14.47 GHz in Ku-band and 32.20 GHz-35.63 GHz in Ka-band with 10 dB impedance bandwidth of 20.8% and 10.1%. And conical beam radiation patterns are achieved within the two bands, the peak gains in the lower and upper bands are 5.4 dBi and 9.9 dBi respectively.
Ground Penetrating Radar (GPR) technology is a widely used detectiontechnology for underground target objects, which can perform non-destructive detection of underground targets. Due to the complexity of the undergro...
ISBN:
(数字)9781837240982
Ground Penetrating Radar (GPR) technology is a widely used detectiontechnology for underground target objects, which can perform non-destructive detection of underground targets. Due to the complexity of the underground environment and the interference of clutter, manual processing of GPR data is a time-consuming and laborious task. Therefore, an accurate and fast automatic underground target detection method is urgently needed. We propose a method that can achieve fast goals in complex multi-goal situations. The simplified ResNet-50 network is used to detect dense intersecting hyperbolic curves and reduce the computation of the network. At the same time, we use k-means clustering algorithm to optimize the anchor in faster-Rcnn based on the characteristics of GPR hyperbola. In addition, this method is also suitable for target detection on GPR images under random media.
In this paper, a deep learning based localization scheme is proposed for unmanned aerial vehicle (UAV) aided wireless sensor networks (WSN s), The scheme contains two components which are ranging and localization. In ...
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ISBN:
(纸本)9781665450867
In this paper, a deep learning based localization scheme is proposed for unmanned aerial vehicle (UAV) aided wireless sensor networks (WSN s), The scheme contains two components which are ranging and localization. In the ranging component, a UAV works as a data collector and calculates the distances between the ground sensor nodes. In the localization component, a localization convolutional neural network (CNN) is built and trained to estimate the nodes coordinates using the ranging information. Simulations results show that the proposed localization scheme has a higher accuracy comparing with a related method.
Considering the continuous development of intelligent technology and the wide application prospects of unmanned aerial vehicles (UAVs), the target tracking technology will be applied in future combat. In order to deal...
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ISBN:
(数字)9781665426473
ISBN:
(纸本)9781665426480
Considering the continuous development of intelligent technology and the wide application prospects of unmanned aerial vehicles (UAVs), the target tracking technology will be applied in future combat. In order to deal with the complex battlefield environment and the scale change of the target during tracking, an improved scale-adaptive correlation filter algorithm based on fusion features is proposed to realize the tracking of military personnel. First, the fast histogram of oriented gradient (FHOG) features and the local binary pattern (LBP) features are adaptively weighted and fused to achieve the target location. Then the translation filter of kernelized correlation filters(KCF) and the scale filter of discriminative scale space tracking(DSST) are combined to comprehensively improve the calculation speed and scale adaptation performance of the algorithm and track the target in time. The experimental results prove the robustness and practicability of the proposed method, which can accurately track military targets in real time.
Vivaldi antenna has superior radiation performance and simple process, which can be used for common radar ranging. However, as a transmitting antenna, the Vivaldi antenna beam width is insufficient. In this paper, the...
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ISBN:
(纸本)9781665409889
Vivaldi antenna has superior radiation performance and simple process, which can be used for common radar ranging. However, as a transmitting antenna, the Vivaldi antenna beam width is insufficient. In this paper, the traditional radiation structure of Vivaldi antenna is improved. A wide beam Vivaldi antenna based on elliptical slot structure is proposed, and the size is 150 mm×150 mm×1.6 mm, and FR4 is selected as the dielectric layer material. In the 2.5GHz-4GHz frequency range, the half-power beam width of the antenna reaches 90°, and the maximum reaches 128.3°. The gain is greater than 3.26 dBi and the directivity consistency is good. In the direction finding and ranging experiment, the antenna was used as the transmitting source of the transceiver system to measure the distance of metal objects. The ranging results are in high agreement with the actual results, indicating that the performance of the antenna is good.
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