This paper identifies the most promising electric power system (EPS) architecture for a future more aircraft based on reviews and evaluations of both weight stability feature existing EPS architectures. When comparing overall different architectures, various aspects, including voltage generation, wiring system, ground operation, conversion, complexity integrating alternative energy sources, are considered. After choosing possible candidates among all architectures by using weight-saving...

Shape memory polymer blocks are used as universal grippers to manipulate multiscaled, arbitrarily shaped objects.

Abstract The TRIZ theory was used to accurately discover the problems be solved in design of roadway surrounding rock control technology. This paper tried solve complex issue deep roadways from a new perspective. Based on functional component analysis and causal axis problem’s primary reason, simultaneously, technology optimized through technical contradiction analysis, physical substance field model analysis. As result, fully enclosed wire-shell support proposed. Finally, taking typical...

Using natural bamboo fibers (BFs) and nano-SiO2 particles together can produce a certain synergistic effects, which may have better toughening strengthening effects than using any one of them separately. This study aims to investigate the effect BFs on mechanical, physical characteristics erosive wear performances BFs/SiO2/epoxy-based ternary composites. The samples were characterized mechanical testing, Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM)...

Abstract Thumb actions, outperforming conventional methods such as hand gestures or wrist in terms of dexterity, agility and intuitiveness, have long been sought‐after for achieving immersive interactive experiences robotic control AR/VR platforms. However, accurate mapping dynamic, subtle thumb actions remains a difficult challenging. Here, wireless, wrist‐affixed soft ultra‐conformal neuromuscular interface system (UniSyst) is reported to capture high‐fidelity surface electromyography...

Missing values in time series data present a significant challenge, often degrading the performance of downstream tasks such as classification and forecasting. Traditional approaches address this issue by first imputing missing then independently solving predictive tasks. Recent methods have leveraged self-attention models to enhance imputation quality accelerate inference. These models, however, predict based on all input observations—including values—thereby potentially compromising...

Abstract Accurate, noninvasive dysphagia assessment is important for rehabilitation therapy but current clinical diagnostic methods are either invasive or subjective. Surface electromyography (sEMG) that monitors muscle activity during swallowing, offers a promising alternative. However, existing sEMG electrode arrays remain challenging in combining the advantages of large coverage area and strong compliance to entire swallowing muscles. Here, we report stretchable, breathable, large‐area...

<title>Abstract</title> This article examined the preparation process of copper-iron composite powder using a chemical displacement method. It focused on how various parameters, such as amount additives in copper sulfate solution, wet stacking time after coating, and reduction temperature, impact surface morphology, composition, structure coating layer. The morphology composition were characterized scanning electron microscopy (SEM) energy-dispersive spectroscopy (EDS), cross-sectional...

<title>Abstract</title> Steel wire ropes, as essential components of industrial safety, require precise damage detection to ensure safe production. Addressing the high missed rates and poor environmental adaptability associated with traditional methods, we propose a novel high-accuracy real-time approach, named SPSS-YOLO. This network is based on YOLOv8 incorporates Swin-Transformer layers enhance multi-scale feature extraction capabilities. It integrates SimAM attention mechanism optimize...

This work is focused on an underwater manipulator. To solve its nonlinear dynamics and hydrodynamics when it operates underwater, model reference adaptive control (MRAC) applied. The output of the represents expected transient response. Adaptive controller parameters are adjusted on-line in real time according to error between system outputs state filters, using parameter regulator. input thus achieved such that can track output. Simulation results demonstrate proposed scheme has accurate...

The existing rolling bearing fault diagnosis method based on the deep convolutional neural network has issues of insufficient feature extraction ability, poor anti-noise and a large number model parameters. A lightweight depthwise separable convolutions is proposed. proposed can simultaneously extract different features from vibration signals in directions to enhance stability model. unit layer reduces size parameters that need be learned. bearings are converted into time-frequency by...

In printing, microreactors, and bioassays, the precise control of micrometer-scale droplet generation is essential but challenging, often restricted by equipment nozzles used in traditional methods. We introduce a needle-plate electrode corona discharge technique that injects charges into an oil layer, enabling manipulation polarization splitting. This method allows for meticulous adjustment microdroplet formation regarding location, size, quantity modulating voltage, time, positioning. It...

In this article, an attitude tracking controller is designed for a quadrotor unmanned aerial vehicle (UAV) subject to lumped disturbances. Firstly, the dynamical model of under external disturbances established. Subsequently, improved sliding mode control (SMC) strategy based on linear extended state observer (LESO). scheme, SMC will guarantee surface finite time reachable and LESO estimate compensate Then, robustness asymptotic stability proposed are proved by analyses. Finally, three...

A novel hollow shell-and-tube heat exchanger with helical elastic coiled tubes was designed to improve the overall transfer performance. Different numbers of baffles installed on (HHETs) were compared HHET without a baffle. The fluid–solid coupling method provided study effects entrance velocity and baffle number performances vibration-enhanced transfer. Based numerical results, vibration become more obvious by increasing velocity. Compared baffle, adding or can remarkably make fluid flow...

Charged droplets driven by Coulomb force are an important part of a droplet-based micro reactor. In this study, we realized the rapid oscillatory motion both in oil and on superhydrophobic surface injecting charges through corona discharge. Distinct from water under DC electric field, charge injection can make more flexible. A droplet layer move up down regularly action discharge, discharge voltage control movement period height droplet. addition, left-right translation be achieved into...

Natural bamboo fibers (BFs), which were treated by silane coupling agents, reinforced epoxy resin (EP)–based composite synthesized. Effects of the agents on chemical structures BFs characterized Fourier Transform Infrared Spectroscopy. The mechanical properties, such as tensile strength, flexural impact and hardness BFs/EP-based composites improved significantly, could be attributed to excellent strengthening effect BFs. Simultaneously, experimental investigations thermal behaviors BFs/epoxy...

Abstract RGB‐D salient object detection (SOD) is to detect objects from one RGB image and its depth data. Although related networks have achieved appreciable performance, they are not ideal for mobile devices since cumbersome time‐consuming. The existing lightweight SOD use information as additional input, integrate with colour image, which achieve impressive performance. However, the quality of uneven acquisition cost high. To solve this issue, depth‐aware strategy first combined propose a...

While selecting a proper power system architecture for more electric aircraft (MEA), it is the volume and weight that treated as most important criterion by researchers. However, with increased use of electronics converters motor drive systems, stability would be deteriorated. Therefore, issue should also considered besides weight. In this paper, an investigation on suitable future MEA done analyzing stability. Firstly, two promising candidates, i.e. hybrid HVAC/HVDC pure HVDC architecture,...