Abstract: This article focuses on the problem that when CRRC Changchun Railway Vehicles Co., Ltd. produces Harbin subway car body steel structures, the roof, chassis, side walls, end walls and other large components need to be finely processed after welding. If traditional horse stools are used for support, it will not only be bulky and the height cannot be adjusted, but also the operator comfort is not high and the work efficiency is reduced. In order to solve this problem, improve production efficiency and save manpower and time costs. We set up a joint research team. After investigation, analysis and demonstration, we developed a plug-in adjustable support device for large subway components. The device can be adjusted in height and width, and the device is light and easy to move and store, with obvious noise reduction and shock absorption effects. It meets the safe production of various types of subway car body steel structures. Read More

Abstract: Real-time anomaly detection in smart grid networks is critical for ensuring the reliability and security of energy distribution systems. Traditional methods often struggle with the complexity and volume of data generated by these networks. This paper presents a novel deep learning-based approach that integrates Cross-Domain Generalization (CDG) and Multi-Task Learning (MTL) to enhance the detection of anomalies in smart grid data. By leveraging diverse datasets and iterative learning techniques, our method improves model robustness and generalization. Experimental results demonstrate significant improvements over baseline methods, showcasing the effectiveness of our approach. We provide comprehensive evaluations and discuss the broader implications for anomaly detection in industrial applications. Read More

Abstract: Inventory shrinkage and fraud represent significant challenges within supply chain management, leading to substantial financial losses for businesses. Traditional inventory management methods, reliant on manual audits and RFID tags, are often insufficient in preventing these issues due to their susceptibility to human error and tampering. Blockchain technology, characterized by its decentralized and immutable nature, offers a promising solution to these problems. This paper explores the application of blockchain-based systems in reducing inventory shrinkage and fraud. By leveraging blockchain's capabilities for enhanced transparency, traceability, and security, businesses can more effectively manage their inventory. The study presents a comprehensive analysis of blockchain technology's principles, benefits, and limitations, alongside real-world case studies and a proof-of-concept experiment. Results indicate that blockchain integration, particularly when combined with IoT devices and smart contracts, significantly reduces shrinkage rates and improves fraud detection, highlighting its potential as a transformative tool in supply chain management. Read More

Abstract: Supercritical circulating fluidized bed boiler has the advantages of good environmental performance and high efficiency of units, which is suitable for large-scale promotion and has a bright commercial application prospect. It is the inevitable choice of clean coal power generation technology in our country at present. When the steam parameter of CFB boiler is raised from 300 MW sub-critical to 350 MW supercritical parameter, the characteristics of steam water in the heating surface tube screen and the gas-solid flow and combustion heat transfer characteristics in the furnace have great changes, and the overall structure and system layout of the boiler also have significant differences, which brings about changes in the heat transfer characteristics in the furnace. In this paper, the heat transfer coefficient of the working medium in the tube and the heat flux distribution in the furnace are obtained by measuring the temperature on the back fire side of the water wall. The results show that the furnace height increases from 6000W/ (m2·℃) to 31000 W/  (m2·℃). The heat flux in the furnace decreases with the increase of furnace height. Read More

Abstract: Taking the two-stage liquid rocket as an example, we use the ANSYS calculation software to consider the fluid-solid coupling after propellant filling, calculate the modes under the first and last two conditions of propellant filling, and obtain the first 20 natural frequency and vibration pattern of the liquid rocket, which provide reference for the safe use of the target range. The calculation results show that the natural frequency of the liquid rocket system decreases after propellant filling compared with that before filling, the modes of order 1 and 2 are low frequency vibration, the natural frequency amplitude changes significantly, while the natural frequency above order 6 is basically stable. Therefore, attention should be paid to eliminating the low frequency vibration source in the environment, and more attention should be given after filling. The 1 and 2 modes of the front and back liquid rockets are swinging, while the liquid rocket structure; the filling propellant will not affect the first 4 modes, but will only change the vibration plane. Read More

Abstract: Transportation is one of the necessary conditions for social material production, and the hydraulic principle occupies an important role in transportation, it is reflected in all aspects of our life. Hydraulic module vehicle is one of the main equipment for the transportation of large heavy cargo in the world, especially suitable for the transportation of petrochemical, energy, steel and other heavy industries and super large equipment. With the continuous improvement of China's living standards, the cost of small and medium-sized cargo transportation in the overall operation transportation costs is increasing, and the development of China's small and medium-sized cargo transport tools is relatively backward, especially the heavy hydraulic equipment, on the whole presents a very big disadvantage. Most of our small and medium-sized goods are handled by the combination of manpower and trolley. This traditional way is time-consuming, laborious and low efficiency, which urgently needs the research and development of small and medium-sized goods handling hydraulic equipment. Therefore, we designed this multi-functional light load hydraulic transport machine. Read More

Abstract: With increasing global concern about environmental protection and climate change, the automotive industry is also under stress to reduce emissions and improve energy efficiency. In this context, extended range power technology, as a hybrid solution that integrates traditional internal combustion engine and electric drive system, has attracted much attention. At present, the extended range power technology has made some progress and has been applied in the market. By combining an internal combustion engine with a battery pack, extended-range vehicles can achieve longer driving ranges and lower exhaust emissions. In addition, in low-speed driving situations such as urban traffic, pure electric mode can play an advantage, thereby improving energy efficiency. Looking ahead, as the automotive industry moves towards carbon neutrality, extension-range power technology is expected to become one of the mainstream options. Through continuous innovation and improvement, it can be predicted that it will make more breakthroughs in energy conservation and emission reduction, improve driving experience, and eventually become one of the important engines to promote the sustainable development of the automotive industry. Read More

Abstract: "Vehicle-Road-Cloud Integration" is key to solving the industrial development of intelligent connected vehicles and is also an important enabling technology for smart transportation. On July 3, 2024, the Ministry of Industry and Information Technology and four other departments released the list of pilot cities for the application of "Vehicle-Road-Cloud Integration" for intelligent connected vehicles, identifying 20 cities (alliances) as the first batch of pilot cities for "Vehicle-Road-Cloud Integration." The announcement of the pilot application list will accelerate the transition of intelligent driving from small-scale testing to large-scale implementation, further speeding up the widespread application and commercialization of advanced intelligent driving. Read More

Abstract: HVDC transmission is a new transmission technology, but it is born with specialties, such as large transmission capacity, skillfully small transmission loss, long transmission distance, and relatively flexible and rapid transmission control. Therefore, HVDC power transmission technology develops rapidly in various countries around the world. Through the principle of HVDC transmission, analyzes the basic principle and hierarchy of HVDC system management, studied the basic components of management system, established the simulation model based on PSCAD / EMTDC model, and tested the principle and performance of HVDC system, DC transmission control trigger switch and transformer adapter. Finally, through simulation, the possible faults in DC transmission operation and the built converter trigger control and cutting filter model are simulated. It can conclude from the simulation waveform diagram that the fault of each device has very different influence on the system. Simulation results verify the correctness and rationality of the design. Read More