Abstract.In order to solve the problems of limited battery life and environmental pollution caused by the dependence of wearable devices on lithium-ion batteries, this study focuses on the efficient collection of human thermal energy, and proposes a flexible stretchable array design based on gradient nanostructure thermoelectric materials, which breaks through the bottleneck of the existing technology through the collaborative optimization of the whole chain of "material-structure-system". On the material level, the Bi₂Te₃/Sb₂Te₃ quantum dot superlattice thin film is constructed, and the Seebeck … Read more →

Abstract.As a safety-grade filtration device within the Important plant water systems of nuclear power stations, the marine organism trap bears the vital responsibility of ensuring reactor heat removal. Any blockage would trigger unit fault signals, leading to shutdown and loss of the safety-grade heat trap, with severe consequences. This paper introduces a novel multi-cartridge marine organism trap featuring planetary gear self-cleaning capability. It outlines the structure, operating principle, and design methodology, determining inlet/outlet pipe diameters, cartridge parameters, and filter area … Read more →

Abstract.To promote the efficient development of wind energy resources in plain areas and the transformation of the energy structure, this study takes a 50MW wind power project in a certain region of Hebei Province, China, as the research object. Based on detailed feasibility study data, a systematic investigation is conducted from aspects including project site selection, wind energy resource assessment, engineering design, economic analysis, and environmental impact. The results show that the financial internal rate of return (FIRR) on the project's equity capital is 12.79%, indicating the project is … Read more →

Abstract.Construction safety is a major challenge in the construction industry, and workers’ unsafe behavior is one of the main causes of safety accident. Therefore, adopting scientific methods to motivate workers' safety behavior (WSB) has become the mainstream in the field. This study establish a priori model based on existing theories and literature to elucidate the relationship between managers' safety attitude(MSA), workers' safety awareness (WSA), trust in managers (WTM), and WSB. Develop a potential model using Netlogo software to investigate the impact of MSA on WSB. Conduct univariate and … Read more →

Abstract.Researchers in the engineering field have developed a large number of new technologies and products to fix carbon dioxide at various stages of concrete structure construction to neutralize the large amount of carbon dioxide emitted by the cement manufacturing industry during the production process. This includes injecting carbon dioxide into freshly mixed concrete, using carbon dioxide gas to cure the concrete, and using carbon dioxide treatment to strengthen recycled aggregates. However, further research is needed to determine whether these concrete carbon sequestration technologies will have … Read more →

Abstract.As a typical urban lifeline infrastructure, integrated utility tunnels play a crucial role in enhancing urban operational safety, optimizing spatial environments, and improving carrying capacity. This paper systematically reviews domestic and international management models of integrated utility tunnel construction, compares their advantages, disadvantages, and applicable conditions, and analyzes the key factors influencing model selection. On the technical side, construction methods, performance design, and the application of information technologies such as BIM and GIS are investigated. In … Read more →

Abstract.With the rapid development of intelligent transportation systems (ITS), intelligent vehicle path planning technology has become a key component in enhancing traffic efficiency, reducing energy consumption, and improving road safety. This paper reviews the latest research progress in the field of intelligent vehicle path planning both domestically and internationally, with a focus on analyzing optimization methods of mainstream algorithms and their application effects under different scenarios. Through an in-depth analysis of the Rapidly-exploring Random Tree (RRT) algorithm and its improved … Read more →

Abstract.Rolling bearings, as core transmission components in rotating machinery, directly determine the reliability of equipment operation and the safety of industrial production. They play an irreplaceable role in key sectors such as aerospace, rail transportation, petrochemical industries, and intelligent manufacturing. In complex working conditions, bearing vibration signals exhibit strong non-stationarity and significant nonlinearity. Traditional fault diagnosis methods face challenges such as a high dependency on manual feature extraction, poor robustness under complex conditions, and … Read more →

Abstract.With the rapid development of UAV technology, mathematical methods play a vital role in the design of quadrotor UAV. This paper systematically expounds the application of mathematical tools in mathematical modeling, control algorithm and optimization method of quadrotor UAV. Aiming at the nonlinear characteristics of UAV, such as the torque model has no driving force characteristics and strong coupling, Euler-Lagrange equation is used to establish a six-degree-of-freedom model of UAV, and coordinate transformation theory is used to accurately describe the motion of UAV. In the control … Read more →

Abstract.As the most critical yet weakest structural unit within composite materials, the fiber–matrix interface plays a decisive role in determining the overall strength and service life of the material. Ultrasonic characterization techniques, owing to their high sensitivity, quantitative capability, and potential for online monitoring, have become a vital approach for investigating interfacial damage and bonding performance. This paper provides a systematic review of the development of ultrasonic characterization methods for fiber–matrix interface evaluation over the past five decades, with … Read more →

Abstract.This study focuses on the basic structure and flight principle of unmanned aerial vehicles (UAVs), and systematically analyzes the core components of the UAV system, the flight control technology and its performance in different application scenarios. The UAV flight platform adopts lightweight and high-strength materials such as carbon fiber composites, and combines GPS/GNSS navigation, inertial measurement unit (IMU) and flight controllers to achieve autonomous flight and high-precision positioning. The ground control and communication system ensures real-time data interaction and remote … Read more →

Abstract.In this research work, a series of one-dimensional compression tests (oedometer tests) was conducted to investigate the compression behavior of reconstituted gap-graded soils composed of kaolin and completely decomposed granite. Sieving analysis was performed to investigating the effect of the particle breakage on the transitional behavior. Stress paths are plotted in terms of void ratio against the vertical stress in semi-log graphs to examine the convergence of the compression behavior of the soils. The correlations of the initial void ratios at which the samples were prepared, the particle … Read more →

Abstract.In recent years, the booming automotive, home appliance, and construction industries have driven a surge in market demand for cold-rolled steel strips. In response to the “carbon neutrality” initiative, the steel industry has accelerated its green transformation. The high added-value characteristics of cold-rolled strip steel highlight the importance of quality control. However, its production process is complex, with intertwined parameters. This paper aims to establish a model that can accurately reflect the production mechanism. For Problem 1, this paper innovatively combines principal … Read more →