In view of the serious accidents caused by fatigue operation tower crane drivers in construction, this study puts forward a novel type portable semi-dry electrode to detect mental state real time and reduce occurrence unsafe behavior. The not only possesses advantages low contact impedance convenient use as traditional dry wet electrodes, but also has more stable performance compared with electrodes designed previous scholars. It is suitable for experimental occasions such detection...

Abstract To investigate influence of the single steel fibers, polyvinyl alcohol fiber (PVA) and hybrid fibers on properties high performance concrete (HPC), tests fresh properties, compressive strength, flexural strength toughness HPC reinforced with PVA were conducted. The was evaluated through several analysis methods improved evaluation methods. In order to analyze toughening principle effect different content four‐point bending test simulated by finite element modeling. And calculation...

The composite cross arm tower exhibits excellent electrical performance, which contributes to a reduction in the width of transmission line corridors, minimizes use steel towers, and mitigates issues such as wind bias tripping. This functionality supports low‐carbon design overhead lines, emphasizing importance quality efficiency. However, elimination suspension insulator string linear towers leads significant longitudinal unbalanced tension during adverse conditions conductor breaks or ice...

This study describes the detection of driving fatigue using characteristics brain networks in a real environment. First, θ, β and 36-44 Hz rhythm from EEG signals drivers were extracted wavelet packet decomposition (WPD). The correlation between channels was calculated Pearson coefficient subsequently, built. Furthermore, clustering (C) global efficiency (G) complex to analyze functional differences brains over time. Combined with relative power spectrum ratio (β/θ) mean value...

A home-auxiliary robot platform is developed in the current study which could assist patients with physical disabilities and older persons mobility impairments. The robot, mainly controlled by brain computer interface (BCI) technology, can not only perform actions a person’s field of vision, but also work outside vision. wavelet decomposition (WD) used this to extract δ (0~4 Hz) θ (4~8 sub-bands subjects’ electroencephalogram (EEG) signals. correlation between pairs 14 EEG channels...

In the field of construction, lifting environment precast parts is more complex, which leads to driver's fatigue. When tower crane driver appears driving fatigue, it will appear slow operation response, hoisting abnormal swing, endanger safety on-site operators. Therefore, this study developed a kind transcutaneous acupoint electrical stimulation gloves. wears glove, good contraction glove can make electrode closely fit with three points, so as perform on Neìguān point (内关PC6), Láogóng...

The study on precast UHPC-NC composite beams investigated the effects of shear span ratio, stirrup reinforcement and NC strength cracking force diagonal crack width. Tests eight one RC beam revealed that increasing ratio reduced widened cracks. U-shaped UHPC formwork enhanced delayed development. While had minimal impact force, it helped delay growth. A proposed model accurately estimated maximum width, offering valuable insights for engineering applications.

Abstract Inherent hemispheric asymmetry is important for cognition, language and other functions. Describing normal brain development during early will improve our understanding of how different hemispheres prioritize specific functions, which currently unknown. Here, we analysed developmental changes in the proteome bilateral frontal lobes three foetal specimens late first trimester pregnancy. We found that this period, difference expression between gestational weeks (GWs) increased,...

Empirical mode decomposition is useful in nonparametric signal denoising problem. In this paper, a method based on intrinsic functions proposed. A block energy criterion the samples between two adjacent zero-crossings proposed to distinguish from noise. To verify effectiveness of presented different synthetic signals corrupted by additive white Gaussian noise are simulated under sampling frequencies settings, and results compared with existing EMD methods. The simulation illustrated that...

Only one wind field model loading the transmission tower or tower‐line system was investigated in previous studies, while influence of two different models not considered. In addition, only sample speed random process used past numerical simulations, and multiple dynamic response statistical analysis should be carried out. this paper, wind‐induced single towers is performed with improved accuracy. A finite element (the consisted both steel tubes angel steels) established by ANSYS software....

The flexural properties of high-performance concrete (HPC) can be enhanced by mixing two fibers with appropriate volume contents. Four-point bending tests were conducted on 48 beams to investigate the behavior steel–polyvinyl alcohol (PVA) fiber–reinforced HPC. effects content and hybrid ratio parameters such as strength toughness are discussed. synergistic effect reinforcing HPC was analyzed quantitatively. index (RIv) considering elastic modulus tensile used analyze steel–PVA results...

Currently most technologies used by virtual studio systems are extended applications of Virtual Reality (VR) technologies. But for small TV stations and web stations, based on traditional VR is so expensive while the FLARToolKit technology Augmented (AR) their top option. However, calculation speed a little slow frame rate very difficult to reach live broadcasting video level. My improvements apply adaptive thresholds, use sample blurring change identification frequency, which solves...

In view of the serious accidents caused by fatigue operation tower crane drivers in construction, this paper puts forward a new type portable semi-dry electrode to detect mental state real time and reduce occurrence unsafe behavior. This combines advantages low impedance wet convenient installation disassembly dry electrode. It is suitable for experimental occasions such as detection collecting electroencephalogram (EEG) signals long time. addition, combined with Gramian Angular Difference...

This paper emphasizes improving the navigation performance, when refraction starlight is used to compute position and velocity of a satellite in unscented Kalman filter. In order avoid impact inaccurate measurement information, memory fading filter proposed. Influenced by factor, refreshment results becomes dynamic process, which new information plays more important role. Besides, length limited time interval completely isolate old information. Theoretical analyses simulation show that...