碳点(CDs)作为一种新型的零维碳基纳米材料, 由于其优异的荧光性质、良好的生物兼容性、低细胞毒性以及丰富的表面官能团等性质, 在荧光传感和生物医学领域具有巨大的应用潜力。特别是针对肿瘤弱酸性的微环境特点, 设计pH响应型碳点来实现对肿瘤的特异性治疗将尤为重要。本文对近年来基于pH响应型碳点的研究工作进行了系统的调研, 综述了pH响应型碳点的荧光机制及其在pH传感、生物成像及癌症治疗等生物医学领域的应用, 并对pH响应型碳点目前面临的主要挑战以及未来发展的方向进行了展望。

An innovative formaldehyde gas sensor based on thin membrane type metal oxide of TiO₂layer was designed and fabricated. This sensor under ultraviolet (UV) light emitting diode (LED) illumination exhibits a higher response to formaldehyde than that without UV illumination at low temperature. The sensitivities of the sensor under steady working condition were calculated for different gas concentrations. The sensitivity to formaldehyde of 7.14 mg/m³is about 15.91 under UV illumination with response time of 580 s and recovery time of 500 s. The device was fabricated through micro-electro-mechanical system (MEMS) processing technology. First, plasma immersion ion implantation (PIII) was adopted to form black polysilicon, then a nanoscale TiO₂membrane with thickness of 53 nm was deposited by DC reactive magnetron sputtering to obtain the sensing layer. By such fabrication approaches, the nanoscale polysilicon presents continuous rough surface with thickness of 50 nm, which could improve the porosity of the sensing membrane. The fabrication process can be mass-produced for the MEMS process compatibility.

设计了一种加热炉内钢坯表面温度实时检测系统，以DSP为图像处理核心，采集加热炉内两幅临近中心波长的近红外辐射图像，用比色测温算法计算出钢坯表面温度。 对比色测温原理、系统的硬件电路、软件流程和试验效果进行了分析。在H型钢加热炉的试验表明，系统能实时检测加热钢坯的表面温度，实时生成加热炉内温度场 的伪彩图像并完成工况分析。钢坯表面温度检测的相对误差小于0.5%，满足加热炉温度控制工艺的要求。

介绍了一种基于DM642的实时图像伪彩处理系统,并对硬件设计和软件实现进行了详细的阐述。 硬件是以DM642为中央处理核的单通道输入与输出架构, 软件采用单线程流水线方式顺序执行,提高了程序执行的效率,满足实时性及稳定性要求。最后 介绍了此方案的实验及实践检验效果。

材料的疲劳过程是能量耗散的过程,它在宏观上表现为热耗散。能量理论是研究材料疲劳行为的微观机理和宏观现象的桥梁。利用具有准确、快速、便捷、低成本等优点的红外热像仪测量了45# 钢疲劳过程中的温度变化,并对疲劳过程中引起温升的机制进行了探讨。通过对试验数据的分析,快速确定了45# 钢的疲劳极限,而且实测值处于疲劳极限估算值的范围内。