时间：2022年6月2日（星期四）14:30-16:30
会议号：腾讯会议854 955 393
主办：www.bob.com
承办：工学院
报告人1：林晓慧14:30-15:10
题目：基于无损检测技术探究农产品的形状及结构对其真空微波干燥特性的影响
Evaluations of Drying Features of Typical Agricultural Products Undergoing Microwave-Vacuum Drying by Non-destructive Techniques
摘要：无损检测技术能为食品工业的定性和定量分析提供一种无损伤、快速、高效和方便的检测方法。本课题应用近红外高光谱成像、红外热成像仪和计算机视觉等无损检测技术，揭示了生姜不同切割方式和形状对其干燥特性的影响，以及蘑菇微观结构、介电特性和温度对其干燥特性的影响。此外，本课题基于近红外高光谱成像技术建立了监测胡萝卜、芹菜、土豆和菠菜叶片真空微波干燥水分分布的通用模型。
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.
报告人2：刘聪15：10-15:50
题目：基于表/界面效应的液滴定向输运及其基础应用研究
Research on directional droplet transport and its basic application based on surface/interface effect
摘要：人类诸多科技进展起源于自然界，模仿生物表面的特殊结构和功能是人类技术思想和发明创造的源泉。受自然界生物表/界面效应的启发，液滴定向输运仿生表面已成为跨学科领域的研究热点，其通过改变固/液/气三相界面的作用行为，促进质量、动量传递及能量转换，在农药喷洒、微流控、相变传热、自清洁、防结冰领域具有重要的应用前景。然而，现有液滴输运表面仍面临着输运机理不完善、表面耐用性差以及应用有待进一步开发等问题。基于此，本研究基于仿生学理念，设计和制备针对不同工作温度环境下的液滴定向输运表面；研究表面液滴的动力学行为，揭示液滴的输运机理；开发基础应用，并研究表面的稳定性和耐久性。研究成果对于拓展液滴定向输运机理，推动其在复杂工况下的实际应用具有重要的意义。
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.
报告人3：董政呈15:50-16:30
题目：信息物理系统韧性提升方法研究
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。
本研究考虑信息和物理系统的拓扑相似性，提出了一种层次化信息物理系统空间网络模型，研究了多种蓄意攻击下的系统脆弱性。以信息物理电力系统为例，研究了随机/区域攻击下的系统脆弱性，研究了攻防资源分配策略。此外，考虑极端事件前的场景特点，基于防-攻-防视角研究了信息物理电力系统灾害前的防御资源分配。相关研究和结果可为信息物理系统的保护及韧性提升提供支持。
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.