This research introduces a path planning method based on the geometric A-star algorithm. The whole approach is applied to an Automated Guided Vehicle (AGV) in order avoid problems of many nodes, long-distance and large turning angle, these usually exist sawtooth cross paths produced by traditional First, grid models port environment. Second, nodes close-list are filtered functions P(x,y ) W(x,y that do not meet requirements removed generation irregular paths. Simultaneously, enhance...

High-resolution images provided by synthetic aperture radar (SAR) play an increasingly important role in the field of ship detection. Numerous algorithms have been so far proposed and relative competitive results achieved detecting different targets. However, detection using SAR is still challenging because these are affected degrees noise while inshore ships shore image contrasts. To solve problems, this paper introduces a method called N-YOLO, which based on You Only Look Once (YOLO). The...

In light of recent advances in deep learning and Synthetic Aperture Radar (SAR) technology, there has been a growing adoption ship detection models that are based on methodologies. However, the efficiency SAR is significantly impacted by complex backgrounds, noise, multi-scale ships (the number pixels occupied images varies significantly). To address aforementioned issues, this research proposes Pyramid Pooling Attention Network (PPA-Net) for detection. Firstly, Pooled Module (PPAM) designed...

Abstract Recently, piezoelectric energy harvesters (PEHs) have been paid a lot of attention by many researchers to convert mechanical into electrical and low level vibration. Currently, most PEHs worked under high frequency In this paper, we propose micro cantilever generator based on the bonding bulk PZT wafer phosphor bronze, which is fabricated MEMS technology, such as chemical thinning etching. The experimental results show that open-circuit output voltage, power density prototype are 35...

This paper proposes an impact-based micro piezoelectric energy harvesting system (PEHS) working with the frequency up-conversion mechanism. The PEHS consists of a high-frequency straight cantilever (SPC), low-frequency S-shaped stainless-steel (SSC), and supporting frames. During vibration, behavior is realized through impact between bottom top cantilever. SPC used in fabricated using new electromechanical (MEMS) fabrication process for thick film on silicon substrate. output performances...

A gullwing-structural piezoelectric energy harvester mainly consisting of two typical nonlinear buckled-bridges is proposed to effectively scavenge low-frequency rotational kinetic based on a gear mechanism induced interwell oscillation. natural buckled unit and flexible polymer substrate are used for the buckled-bridge. thinned bulk lead zirconate titanate ceramic employed layer in consideration its excellent electromechanical factor. The presented can generate peak open-circuit voltage 20...

With the rapid development of wireless communication and micro-power technologies, smart wearable devices with various functionalities appear more in our daily lives. Nevertheless, they normally possess short battery life need to be recharged external power sources a long charging time, which seriously affects user experience. To help extend or even replace it, non-resonant piezoelectric-electromagnetic-triboelectric hybrid energy harvester is presented effectively harvest from low-frequency...

A nanochannel, based on CF 3 to break water clusters, achieves a record output power density of 4.10 W m −2 among clay generators.

Adenomyoepithelioma (AME) is a relatively rare type of tumor formed by the coordinated proliferation glandular epithelial cells and myoepithelial cells. Clinically, most them are benign, while malignant ones extremely rare. Malignant breast adenomyoepithelioma somewhat invasive may recur locally or metastasize distantly through vascular pathway. However, reports on axillary lymph node metastasis scarce. In this case, we present an instance with metastasis. By combining previous studies,...

In this paper, we have designed a fabrication process for microgenerators by bonding piezoelectric ceramic Pb(Zr,Ti)O3 (PZT) plate to silicon on insulator (SOI) wafer. The key techniques of the include low-temperature technique using conductive epoxy resin, thinning bulk PZT mechanical lapping and wet-etching combined method, micromachining ceramics dicing. Through development optimization process, MEMS power generator array was successfully fabricated. typical device is selected...

Ruthenium-based perovskite systems are attractive because their Structural, electronic and magnetic properties can be systematically engineered. SrRuO$_3$/SrTiO$_3$ superlattice, with its period consisting of one unit cell each, is very sensitive to strain change. Our first-principles simulations reveal that in the high tensile region, it transits from a ferromagnetic (FM) metal an antiferromagnetic (AFM) insulator clear tilted octahedra, while low without octahedra tilting. Detailed...

Structural transformation and the variation in band gap of (0001) AlN GaN films as a function equibiaxial in-plane strain are studied using HSE06 range-separated hybrid functional. Although under share same structural transition from wurtzite to graphitelike phase, their electronic properties significantly different. Both can display either direct or indirect structures, whereas is always indirect. Furthermore, it more difficult for than obtain semi-metallic phase. Our results support...

In order to solve the problem of control performance degradation caused by time delay in wave compensation system, predicting vessel heave motion can be input vector system alleviate problem. The belongs series, this paper proposes an improved Long Short-Term Memory (LSTM) model with a random deactivation layer (dropout), which deal series very well. obtain motion, establishes suitable for marine operation, and solves through mathematical motion. Finally, predicts short predicted series....

The structural stability, spontaneous polarization, piezoelectric response, and electronic structure of AlN GaN under uniaxial strain along the [0001] direction are systematically investigated using HSE06 range-separated hybrid functionals. Our results exhibit interesting behavior. (i) share same transition from wurtzite to a graphite-like phase at very large compressive strains, similarly other semiconductors. calculations further reveal that this well-known is driven by transverse-acoustic...

Ship detection from high-resolution optical satellite images is still an important task that deserves optimal solutions. This paper introduces a novel image network-based approach based on the preselection of region interest (RoI). pre-selected network first identifies and extracts input images. In order to efficiently match ship candidates, principle our distinguish suspected areas hue, saturation, value (HSV) differences between ships background. The whole basis experiment with large...

Aiming at the continuous motion control problem of upper limb auxiliary exoskeleton. In this paper, we use particle swarm optimization (PSO) to optimize long short-term memory network (LSTM), and optimized establish a map between surface electromyography (sEMG) signals joint angles. The inputs model are sEMG feature time series, which have been dimension reduction processed, outputs angles elbow wrist. To validate effectiveness PSO-LSTM model, eight healthy subjects participated in...

Abstract For the offshore wave compensation control system, its controller setting will directly affect platform's effect. In order to study system and optimization strategy, we build simulate model by using particle swarm (PSO) optimize controller's parameters compare results with other intelligent algorithms. Then response errors of platform under different PID controllers; algorithm's genetic algorithm optimization. The show that is 63.94% lower than overshoot, peak time 0.26 s lower,...

Container terminal yards are automated yards. The rail-mounted gantry crane (RMGC) and tracks (RMGCTs) that frequently operate in need to be inspected regularly ensure the safe operation of container transportation yard. This paper proposes a framework for path planning RMGCT visual inspection using UAV port environment. consisted two main aspects. First, global all viewpoints was planned according requirements A* algorithm improved minimum snap method. Second, intelligent bidirectional...