会议号：腾讯会议854 955 393
Evaluations of Drying Features of Typical Agricultural Products Undergoing Microwave-Vacuum Drying by Non-destructive Techniques
Non-destructive Techniques provide a rapid, non-destructive, and chemical free method for food quality evaluation. The current study investigated effects of cutting methods and shapes on gingers, and effects of microstructures, dielectric properties and temperature on mushrooms undergoing microwave-vacuum drying using near-infrared hyperspectral imaging, IR thermal imaging and computer vision. Additionally, near-infrared hyperspectral imaging was employed to develop a general model for monitoring moisture distribution of carrots, celeries, potatoes, and spinach leaves undergoing microwave-vacuum drying.
Research on directional droplet transport and its basic application based on surface/interface effect
A lot of progress in science and technology comes from the natural world. It is the source of intellectual thought and inventiveness to imitate special structures and functions of biological surfaces. Inspired by the special effects of natural biological surfaces, droplet directional transport surfaces have become a research hotspot in interdisciplinary fields. By changing the interaction behaviour of the solid/liquid/gas three-phase interface, these surfaces promote mass, momentum transfer and energy conversion, thereby showing huge application prospects in pesticide spraying, microfluidic, phase change heat transfer, self-cleaning and anti-icing. However, the existing surfaces allowing transport of droplet still faces some challenges, such as incomplete transport mechanism, poor surface durability and inadequate development of applications. Therefore, this study designed and prepared the directional droplet transport surface under different operating temperatures based on the concept of bionics. The kinetic behaviour of droplets was studied to reveal the droplet transport mechanism. The basic applications of surfaces and their stability and durability were studied. The outcomes are of great significance for expanding the transport mechanism of droplets and promoting its practical application in complex working conditions.
Research on resilience enhancement methods for cyber-physical systems
摘要：设备的信息化和智能化使得传统物理系统发展成为物理和信息深度融合的信息物理系统（Cyber-physical system, CPS）。在这类系统中，物理和信息的流动更为复杂，呈现出相互依存的特性。因此，信息物理系统不仅面临着传统物理侧的威胁，还同时引入了信息侧的风险。此外，复杂系统还暴露在人为破坏、网络攻击和自然灾害等多种外部事件中，严重危害着系统的安全稳定运行。因此，提升信息物理系统抵御极端事件的韧性具有重要意义。
The informatization and intelligence of equipment has made the traditional physical system evolve into a cyber-physical system (CPS) with deep integration of physical and information (cyber) systems. The flow of physics and information in such systems is more complex and presents interdependent characteristics. As a result, the cyber-physical system is not only exposed to traditional physical-side threats, but also introduces information-side risks at the same time. In addition, complex systems are exposed to a variety of external events such as human damage, cyber-attacks and natural disasters, which seriously jeopardize the safe and stable operation of the system. Therefore, it is of great importance to enhance the resilience of cyber-physical systems to withstand extreme events.
In this study, considering the topological similarity of information and physical systems, a spatially embedded hierarchical cyber-physical system model is proposed to analyze the system vulnerability under multiple deliberate attacks. Taking the cyber-physical power system (CPPS) as an example, the system vulnerability under random/localized attacks is studied, and the attack and defense resource allocation strategies are investigated. In addition, considering the characteristics of the scenarios before extreme events, the allocation of defense resources before disasters is studied based on the defense-attack-defense perspective. The research and results can yield insights for the protection and resilience enhancement of cyber-physical systems.