宁波大学压力容器与管道安全浙江省工程研究中心, 宁波 315000
干湿交替和硫酸盐腐蚀引起的损伤严重影响导电混凝土服役时的长期稳定性。本研究以碳纤维、石墨作为导电相材料, 掺入粉煤灰和硅灰制备导电混凝土, 在干湿交替和硫酸盐腐蚀耦合作用下, 讨论粉煤灰、硅灰掺量对导电混凝土力学性能与电学性能的影响。综合导电混凝土的力学性能与电学性能衰变定义了服役性能劣化指标。结果表明: 掺入粉煤灰和硅灰后提升了导电混凝土在干湿交替和硫酸盐腐蚀下的耐久性和导电稳定性; 当粉煤灰和硅灰的总掺量一定时, 提高粉煤灰占比能够有效降低干湿交替和硫酸盐腐蚀造成的强度损失, 并提高导电混凝土的导电稳定性。
导电混凝土 干湿交替 硫酸盐腐蚀 电阻率 配合比 优化设计 conductive concrete alternating wetting and drying sulfate corrosion electrical resistivity mix ratio optimal design
Author Affiliations
Abstract
1 Electronic Information School, Wuhan University, Wuhan 430072, China
2 Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
3 Peng Cheng Laboratory, Shenzhen 518055, China
4 Wuhan Institute of Quantum Technology, Wuhan 430206, China
For a conventional cascaded metasurface, the combination channel and each single channel are mutually dependent because the phase modulation of a cascaded metasurface is the sum of each single one. Here we propose a cascaded metasurface that can independently encode information into multiple channels. Based on the orientation degeneracy of anisotropic metasurfaces, each single metasurface can produce a quick-response (QR) image in the near field, governed by the Malus law, while the combined channel can produce a holographic image in the far field, governed by geometric phase. The independent and physically separated trichannel design makes information encryption safer.
cascaded metasurfaces optical encryption holography nanoprinting Chinese Optics Letters
2023, 21(2): 020003
Author Affiliations
Abstract
1 Institute of Neuroscience, Department of Neurobiology, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University, School of Medicine, Hangzhou, Zhejiang 310058, P. R. China
2 State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, and the Collaborative Innovation Center for Brain Science, Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China
Optical microscopy promises researchers to see most tiny substances directly. However, the resolution of conventional microscopy is restricted by the diffraction limit. This makes it a challenge to observe subcellular processes happened in nanoscale. The development of superresolution microscopy provides a solution to this challenge. Here, we briefly review several commonly used super-resolution techniques, explicating their basic principles and applications in biological science, especially in neuroscience. In addition, characteristics and limitations of each technique are compared to provide a guidance for biologists to choose the most suitable tool.
Super-resolution microscopy total internal reflection fluorescence microscopy stimulated emission depletion microscopy structure illumination microscopy photoactivation localization microscopy stochastic optical reconstruction microscopy. Journal of Innovative Optical Health Sciences
2017, 10(5): 1730001