Fast emission color switching of circularly polarized luminescence in platinum(ii) liquid crystalline co-assembly.

Developing stimuli-responsive circularly polarized luminescence (CPL) materials that feature fast emission color switching for advanced information encryption presents a scientifically significant yet formidable challenge. Herein, we construct a supramolecular co-assembly system demonstrating transiently responsive CPL emission color switching, enabling mechanically-modulated information encryption. Combining a highly luminescent Pt(II) liquid crystal (Pt8) with the anchored binaphthyl inducers (/-M) forms chiral co-assemblies (/-M)-(Pt8), which assemble into twisted nanobelts (180 °C) and helical nanofibers (260 °C) exhibiting green ( = 545 nm, = 0.

Has the green total factor productivity increased in the early stage of the establishment of smart city.

In the context of global climate change, green development has become the main goal of smart city construction. Most existing research suggests that smart cities will enhance the level of the green total factor productivity (GTFP) in cities. However, this study found that smart cities will reduce the level of green total factor production in the short term and increase it in the long term.

Flue gas desulfurization gypsum mineralization in waste Lye medium at pilot scale.

CO capture, utilization and sequestration technology is currently a global research hotspot with increasing CO emission and rising atmospheric temperatures. Flue gas desulfurization gypsum (FGDG) was used to realize CO mineralization in waste NaOH lye in a pilot scale bubble tower. The effects of the ionic strength, CO flow rate, reaction temperature, and liquid level in the reactor on the properties of the mineralization products and the CO mineralization efficiency were investigated using thermogravimetric analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and particle size analysis.

Concurrent Production of Glycolic Acid via Anode Valorization of Plastic Paired With Cathode Upcycling of Biomass Derivative.

Electrochemical upcycling of polyethylene-terephthalate-derived (PET-derived) ethylene glycol (EG) into valuable chemicals, such as glycolic acid (GA), provides a sustainable route for reclaiming the carbon resource in plastic wastes. However, valorization of EG to GA is realized solely via anodic oxidation, which is typically accompanied by the generation of low-value hydrogen at the cathode. Here, we develop a GA production system that combines anodic and cathodic GA production via oxidation of PET-derived EG paired with reduction of biomass-derived oxalic acid, which is made possible by the discovery of a robust PdBi alloy anode and earth-abundant TiO cathode.

Composite SnO-KS ETL for energy level regulation and electron mobility enhancement in perovskite solar cells.

High-performance perovskite solar cells commonly utilize SnO as the electron transport layer (ETL), which is vital for perovskite crystallization and defect regulation, yet energy level mismatch, oxygen vacancies in SnO, and defects at the buried interface impede the device's photovoltaic performance. Therefore, we found that incorporating KS into the SnO layer effectively regulated the energy levels and occupied oxygen vacancies, enhancing the electron mobility of the composite SnO-KS ETL and improving the interface quality to promote efficient electron extraction and transport. Consequently, the device based on SnO-KS ETL showed an enhanced photovoltaic performance with power conversion efficiency of to 23.

Image Fusion and Target Detection Based on Dual ResNet for Power Sensing Equipment.

Target detection helps to identify, locate, and monitor key components and potential issues in power sensing networks. The fusion of infrared and visible light images can effectively integrate the target the indication characteristics of infrared images and the rich scene detail information of visible light images, thereby enhancing the ability for target detection in power equipment in complex environments. In order to improve the registration accuracy and feature extraction stability of traditional registration algorithms for infrared and visible light images, an image registration method based on an improved SIFT algorithm is proposed.

Space-time acoustic coding metasurfaces with scattering reduction characteristics.

In recent years, constructing space-time joint modulation acoustic metasurfaces with harmonic manipulation capabilities to achieve excellent scattering reduction within three-dimensional (3D) space has remained a significant challenge. Here, space-time acoustic coding metasurfaces (STAMs) with harmonic manipulation in 3D space are demonstrated, which consist of two types of sub-wavelength unit cells. By changing acoustic impedance of proposed unit cells, the phase difference between these unit cells can maintain 180° in the operation frequency.

Ion Implantation Combined with Heat Treatment Enables Excellent Conductivity and Corrosion Resistance of Stainless Steel Bipolar Plate Anode for Hydrogen Fuel Cells.

The broad use of (stainless steel) SS 316 L bipolar plates (BPs) in proton exchange membrane fuel cells relies (PEMFC) on high conductivity and corrosion resistance. To enhance the properties of stainless steel, this study applies ion implantation and heat treatment to form a non-homogeneous modified layer on SS 316 L. The injection of C and Mo ions on the SS 316 L surface caused irradiation damage, producing holes.

High resolution photoacoustic vascular image reconstruction through the fast residual dense generative adversarial network.

Photoacoustic imaging is a powerful technique that provides high-resolution, deep tissue imaging. However, the time-intensive nature of photoacoustic microscopy (PAM) poses a significant challenge, especially when high-resolution images are required for real-time applications. In this study, we proposed an optimized Fast Residual Dense Generative Adversarial Network (FRDGAN) for high-quality PAM reconstruction.

Efficiently intensified nitrogen transformation in electrolysis-integrated constructed wetlands: Comparative performance and mechanism.

This study developed constructed wetlands (CWs) with direct current (DC) electrolysis and iron-carbon (IC) microelectrolysis. Ammonium removal was more significantly enhanced with IC by 12.7-27.

A continuous kinematic calibration method for accuracy maintenance of industrial robot based on recursive least squares algorithm.

Industrial robots have become more and more important in the advanced manufacturing industry. There is still a degradation problem in the accuracy performance of industrial robots after being calibrated. To maintain the accuracy performance of robots timely, a continuous kinematic calibration method is proposed.

Resilience and online learning emotional engagement among college students in the digital age: a perspective based on self-regulated learning theory.

Background: Self-efficacy perception and strategy use are two key processes for achieving self-regulated learning. Based on the perspective of self-regulated learning theory, this study explores the mediating mechanism of self-regulated learning efficacy, and strategy use (self-control and emotion regulation strategies) between resilience and online learning emotional engagement.

Methods: The study was conducted on 2182 college students from China using questionnaires, and a structural equation model was established to test the mediating effects.

Anionic high-entropy doping engineering for electromagnetic wave absorption.

High-entropy doping (HED) engineering surpasses conventional methods for optimizing atomic configurations and electronic structures, opening new paths for developing advanced electromagnetic wave absorbing (EWA) materials. However, the application of anionic HED engineering to tailor EWA mechanisms remains unexplored. Herein, we employ in situ pyrolysis combined with a three-stage solvent thermal doping procedure to systematically induce anion multibody interactions, thereby facilitating the inheritance and accumulation of beneficial EWA properties.

Identification and control of booming noise of thin-walled metal plates of commercial vehicle body subjected to high-speed airflow.

The thin walled metal plates (TWMP) on top of a commercial vehicle body are easy to produce vibration and booming noise under the action of high-speed airflow, which reduces the sound quality inside the vehicle. Therefore, the effective control of the noise of TWMP is very important for vehicle comfort performance. Based on experimental, finite element, dynamic and fluid techniques, a method for identification, analysis and optimization of TWMP booming noise under high-speed airflow is proposed in this paper.

Facile and Rapid Synthesis of Ultra-Low-Loading Pt-Based Catalyst Boosting Electrocatalytic Hydrogen Production.

The development of a low-cost hydrogen evolution reaction (HER) catalyst is crucial for the implementation of hydrogen production via water electrolysis. Herein, a facile and rapid electrodeposition method to synthesize an ultra-low-loading platinum-based catalyst in a short time of 120 s without any other chemical additive is reported. A functionalized nitrogen-doped carbon nanotube (F-N-CNT) is utilized as a carbon support to controllably and effectively anchor the Pt species.

Identifying the spatiotemporal heterogeneity of the relationships between grain production and its determinants using the GTWR model across China.

Background: Ensuring adequate food production is essential to the stability and security of a country. This study aims to assess China's grain production (GP) from 2000 to 2020 and explore the dominant factors affecting the spatiotemporal dynamics of GP.

Results: The present study reveals a significant rise in China's GP capacity over the last two decades, although the growth rate has recently slowed.

Application of design of experiments in accelerated degradation testing of new energy low voltage electrical appliances.

With the continuous development of the new energy industry, the lifespan requirements for low-voltage electrical appliances are increasing, and the time cycle for verifying lifespan is getting longer. Traditional testing methods no longer meet these requirements. Therefore, it is necessary to introduce accelerated degradation testing technology to shorten the testing cycle.

Method for Selecting the Down-Sampling Factor of Photoacoustic Image by Using Cumulative Power Difference in Frequency Domain.

As a novel non-invasive imaging technology, a constraint of photoacoustic microscopy (PAM) is its imaging speed. Often, PAM utilizes sparse spatial sampling, which necessitates extensive prior experimentation to accurately select the down-sampling factors. To overcome this limitation, this study proposes a frequency-domain evaluation index, cumulative power difference (CPD), for rapid selection of the optimal down-sampling factor.

Efficient co-production of ammonia and formic acid from nitrate and polyester paired electrolysis.

Paired electrolysis, which integrates a productive cathodic reaction, such as the nitrate reduction reaction (NORR) with selective oxidation at the anode, offers an intriguing way to maximize both atomic and energy efficiency. However, in a conventional design, the NORR is often coupled with the anodic oxygen evolution reaction, leading to substantial energy consumption while yielding low-value oxygen. Here, we report a hybrid electrolysis system that combines cathodic reduction of nitrate to ammonia and anodic oxidation of polyethylene-terephthalate-derived ethylene glycol (EG) to formic acid (FA), utilizing oxygen-vacancy-rich (O) CoO and Cu doped Ni(OH) as the cathode and anode, respectively.

Tunable Synthesis of 2D Bismuth Oxyhydroxide and Oxysulfide from Solid-Liquid Interfacial Reaction for High Performance Optoelectronic Gas Sensing.

The self-limiting Cabrera-Mott oxidation reaction on metal surfaces provides an effective pathway for synthesizing atomically thin 2D metal oxide. Inspired by this reaction, it is proposed that solid bismuth metals can react with dissolved oxygen and water molecules in an aqueous environment, forming an ultrathin oxyhydroxide layer on their surfaces. The lattice mismatch between the surface oxyhydroxide layer and the underlying pure metal enables the mechanical exfoliation of detached 2D oxyhydroxide nanosheets.

Circularly Polarized Ultraviolet Light-Activated Asymmetric Photopolymerization for the Synthesis of CPL-Active Materials.

Circularly polarized ultraviolet light (CP-UVL) offers significant potential for practical applications in asymmetric photocatalysis and photopolymerization. However, the development of CP-UVL-active materials has been hindered by their low emission dissymmetry factors (g). Here, we present a high-performance CP-UVL material for asymmetric photopolymerization, achieved through thermodynamic regulation of a chiral supramolecular assembly.

Excellent Dynamic Non-Wetting Performance Induced by Asymmetric Structure at Low Temperatures: Retraction Actuation and Nucleation Inhibition.

Asymmetric structures have exhibited significant advantages in regulating wetting behavior. Nevertheless, the influence of this unique structural feature on anti-icing performance remains to be further explored. In this work, static/dynamic anti-icing performance is investigated on the asymmetric superhydrophobic structures fabricated by micro-milling combined with electrodeposition.

The Chinese version of Selection, Optimization, and Compensation Questionnaire: psychometric properties among adolescent students.

Objective: This study established the reliability and validity of the Selection, Optimization, and Compensation Questionnaire in a sample of senior secondary school students in China.

Methods: The data for this study were sourced from 1,080 students from multiple senior secondary schools using the SOC Questionnaire and the Learning Engagement Scale. This study conducted Exploratory Factor Analysis and Confirmatory Factor Analysis.

Research on key factors influencing Chinese designers' use of AIGC: An extension based on TAM and TRI.

With the rapid development of AI intelligent technology, AIGC can bring an innovative revolution to art creation, providing designers with unlimited possibilities but also challenges. These challenges affect the willingness to adopt and constrain the sustainable development of AIGC. The purpose of this study is to analyse the factors of designers' adoption intention behaviours.

Design and implementation of an independent-drive bionic dragonfly robot.

Bionic flapping wing robots achieve flight by imitating animal flapping wings, which are safe, flexible, and efficient. Their practicality and human-machine symbiosis in narrow and complex environments are better than traditional fixed-wing or multirotor drones, indicating broader application potential. By systematic and biomimetic methods, a bionic dragonfly robot with four independent drive flapping wings, called DFly-I, was designed.