集成成像3D信息获取技术

集成成像作为一种新型裸眼三维(3D)显示技术,能够完整获取3D信息并还原再现,是目前最具发展前景的裸眼3D显示技术之一。其中,对3D信息的完整获取通过记录场景不同角度的视差信息,并以微图像阵列形式进行呈现,不仅能够为集成成像显示提供3D内容,更作为一种多维度信息获取手段,在被遮挡场景的探测成像、目标识别、2D/3D信息加密和显微3D成像等多个领域得到应用。文中对集成成像3D信息获取的基本原理、不同类型的集成成像3D信息获取技术以及集成成像3D信息实时获取技术进行综述,并讨论现存的一些问题以及未来发展趋势。     

Synthesis and characterization of uniform nanoparticles of γ-Mo2N for supercapacitors

Uniform nanoparticles of molybdenum nitride were synthesized by temperature-programmed reaction(TPR) using MoO3 and ammonia as reactants. This material was characterized by X-ray diffractometry(XRD), transmission electron microscopy(TEM), scanning electron microcopy(SEM) and cyclic voltammetry(CV). Results show that the material consists of a pure phase of γ-Mo2N nanoparticles with average diameter of about 16 nm. The material presents a specific capacitance of 172 F/g in 1 mol/L H2SO4 electrolyte at a scan rate of 1 mV/s and the potential window is broadened to 1.1 V (-0.6 to 0.5 V). At the 6 000th cycle, the material remains 94.9% and 94.7% of the initial capacitance in 1 mol/L H2SO4 and KCl solution, respectively. A possible mechanism comprising surface control and diffusion control is proposed to explain the effect of scan rates on specific capacitance.     

浅谈道路桥梁施工中预应力的问题

目前,我国道路桥梁建设规模在不断扩大,预应力作为一项重要技术,越来越广泛地应用到道路桥梁施工中,但是也出现很多的质量问题,并且产生这些问题的原因具有多样性。本文首先介绍了预应力在道路桥梁施工过程中的应用,然后分析了道路桥梁中预应力技术在工程操作中出现的问题,最后总结了改善这些问题的改进措施。