Abstract: In modern power electronics and energy management systems, multi-port DC-DC converters are of excellent research significance as they can meet the demands of multiple energy inputs and multiple load outputs in complex systems. With the increasing complexity of energy systems, traditional single-port and bi-directional DC-DC converters make it challenging to meet these demands, so it has become necessary to develop multi-port DC-DC converters for efficient and flexible energy management. The direction of this research mainly reviews the research background and current status of multi-port DC-DC converters, discusses their applications in renewable energy systems, hybrid vehicles, and microgrids, and proposes future research directions. Read More

Abstract: The improvement of charging technology is necessary. By listing the charging characteristics of the three charging modes, this paper gives the methods to improve the charging efficiency of new energy vehicles in each mode, the advantages and disadvantages of the mode to improve the charging efficiency, and what kind of technology is expected to be used in the future. By summarizing the development prospects of various charging methods, providing the direction of building a more energy-efficient charging system in the future, and looking forward to the possible vigorous development of charging modes in the future. Read More

Abstract: Nowadays, the level of science and technology is developing rapidly, and there are more and more ways for people to choose to travel. Under the environment of people's increasing pursuit of environmental protection and sustainable development, the development of the electric vehicle industry has attracted much attention, which contains fuel cell electric vehicles. Fuel cell electric vehicles, as one of the many types of electric vehicles, are special in that chemical energy is converted into electrical energy through the reaction of hydrogen and oxygen, and then the electrical energy is converted into mechanical energy through the drive system. This paper describes the types of fuel cell electric vehicles, introduces the working principle and basic mechanism in detail, and explores the development prospects of the related industry and the basic problems faced by it through the study of its core technology, so as to provide some references for the development of new energy automobile related industries. Read More

Abstract: With the popularization of electric vehicles, wireless charging technology has shown significant advantages in charging convenience, security and other aspects, and has become a research hotspot in the field of new energy vehicles. The purpose of this paper is to discuss the principle, architecture, standards, protocols and development trend of the wireless charging system for electric vehicles. This paper expounds the basic concepts and main technical types of wireless charging, and reveals the application of electromagnetic induction and magnetic resonance in wireless charging; The composition and function of the wireless charging system, as well as the key technical challenges in practical application, are analyzed; The mainstream wireless charging standards and the importance of standardization are sorted out; The development direction, external influencing factors and future application scenarios of wireless charging technology are prospected, which provides theoretical basis and practical guidance for further research on wireless charging technology of electric vehicles. Read More

Abstract: With the global attention to renewable energy and environmental protection, new energy Electric Vehicles (EVs), as a green travel mode, are gradually becoming the development trend of the future automotive industry. However, problems such as inadequate charging infrastructure and long charging times limit the popularity of electric vehicles. The emergence of wireless charging technology provides a new way to solve these problems. This paper aims to discuss the principle, application status, advantages, challenges and future development trend of wireless charging technology for new energy electric vehicles. Read More

Abstract: Drone autonomous decision-making technology is a key component of the UAV system, which aims to enable UAVs to autonomously complete tasks in complex and dynamic environments, reducing human intervention. This paper reviews the current status and development of autonomous decision-making technology of UAVs, mainly covering key technologies such as perception and environmental modeling, path planning and navigation, decision-making and control, and multi-UAV systems. This paper also explores the application scenarios of autonomous decision-making technology for drones in military and civilian fields, such as reconnaissance and surveillance, logistics and distribution, agricultural monitoring, and disaster relief. In view of the challenges faced by the current technology, such as computing resources, environmental complexity, security and privacy protection, this paper proposes possible solutions and research directions. Read More

Abstract: The report presents the design and implementation of a water heater control system utilizing SIMATIC WinCC configuration software. The research highlights the transition from traditional manual control methods to automated systems, demonstrating significant improvements in efficiency, user convenience, and energy conservation. By leveraging the advanced capabilities of WinCC, the system effectively monitors and controls water levels and temperatures, integrating real-time data processing with a user-friendly interface. The project showcases enhanced operational efficiency, safety, and environmental sustainability, emphasizing the critical role of technological advancements in industrial automation. Read More

Abstract: This paper proposes a dual-band magnetoelectric dipole antenna. By changing the size of the electric dipole and the magnetic dipole in the traditional magnetoelectric dipole, the two resonant frequencies are moved to high and low frequencies respectively, so as to realize the dual-band characteristics of the magnetoelectric dipole antenna. Finally, the two impedance bandwidths are measured to be 14.94% (1.6-1.86GHz) and 11.01% (4.25-4.74GHz), and the average gains are 9.8dBi and 6.3dBi respectively. Read More

Abstract: Die casting molds are prone to thermal fatigue under high-temperature and high-pressure cycles, which significantly affects their service life. In this study, a three-dimensional numerical simulation method is employed to analyze the temperature field, stress field, and crack development process of the mold under different cooling cycles. The results show that shorter cooling cycles (15s, 30s) lead to larger temperature gradients and stress concentrations within the mold, thereby accelerating crack initiation and propagation. In contrast, longer cooling cycles (70s) help to reduce the temperature gradient and stress fluctuations, which in turn slows down crack propagation and effectively extends the mold's service life. Read More