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Sveva Longo Enricomaria Mormina Francesca Granata Domenico Mallamace Marcello Longo Silvia Capuani 《文物保护研究》2018,63(7):383-390
A modern approach to the diagnosis of artistic heritage makes use of non-destructive techniques which avoid damage to artworks or signs of interaction with the analytical technique used. For this reason, today, the employment of X-rays to study artistic heritage is quite widespread. Computed tomography (CT) Imaging was first used as specialized medical diagnostic tool in the early 1970s. Today, CT scanners have become more common, and non-destructive three-dimensional imaging has found an increasing number of uses in different areas such as materials research, geology, archaeology, and museum conservation. In this work, a new generation of clinical CT (based on the Dual Energy and multi-slice acquisition principle) is used to investigate an Egyptian wooden mummy board with a total acquisition time of 93.23 seconds and a voxel size of 0.078?×?0.078?×?1.5?mm. The use of two distinct techniques of image post-processing, the two-dimensional multi-planar reconstruction (MPR) and the three-dimensional volume rendering technique (VRT) allowed us to: evaluate the state of conservation of the mummy board, determine how the wooden object was implemented, recognize a nineteenth-century intervention of consolidation, and advance the hypothesis that the wooden planks were reused. In particular, we highlight the use of the cardiovascular and pulmonary filter with VRT reconstruction, which allows a virtual elimination of different parts of the mummy board to investigate those areas otherwise accessible only by removing parts of the board and thus damaging the work. 相似文献
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文章具体阐述了汽车模型的制作过程曲面光顺的重要性和现阶段的问题。并提出利用计算机三维扫描光滑曲面的理论基础,结合实例来验证其方法和流程的可行性。 相似文献
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为了加强对电网及非线性用电设备谐波的在线监测和抑制 ,本文介绍了一种基于远程I/O通信方式的电网质量监控系统 ,重点阐述了远程I/O通讯的原理及实现的方法 相似文献
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以洗车水枪为例,详细阐述了逆向建模的流程,并利用逆向工程软件GeomagicStudio软件和Geomagic Design X软件对扫描数据进行处理,得到了高质量的三维模型。该方法即可获得高质量的三维模型,还可缩短产品开发周期,具有较好的应用价值。 相似文献
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袁晖 《深圳信息职业技术学院学报》2006,4(2):5-7,12
入侵检测系统包含：扫描系统、主体IDS,IDS审计分析系统三个部分,其中扫描系统是IDS设计中非常重要的部件,包括扫描器、弱点(漏洞)数据库,以及分布在各主机上的扫描子系统。本文从扫描器的原理、网络扫描器的设计进行详细的介绍。 相似文献
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Raffaella Fontana Marinella Greco Marzia Materazzi Enrico Pampaloni Luca Pezzati Claudio Rocchini Roberto Scopigno 《Journal of Cultural Heritage》2002,3(4):1
The Minerva of Arezzo is an ancient bronze statue located at the Museo Archeologico in Florence and currently under repair at the Restoration Centre of the Soprintendenza Archeologica of the Tuscany Region. We assembled a complete three-dimensional (3D) digital model of the Minerva before the restoration started. More 3D models will be produced to keep track of the variations that occurred during the restoration process, up to the final acquisition of the form of the restored artwork. The modelling of the Minerva will be the focal point of an ambitious “Minerva Project” that involves the integration of data from other sources in a 3D digital model of the object. Besides this, the project is aimed at showing how 3D techniques can be used to design useful and easily manageable new tools for the diagnostics of archaeological objects. 3D measurements have been realized by means of a high-resolution laser scanner developed at National Institute for Applied Optics (INOA). The instrument is composed of commercial low-cost components in order to be competitive with the very expensive commercial devices. Besides this, our scanner is supported by an efficient and flexible software developed by Consiglio Nazionale delle Ricerche (CNR) that supports all the post-processing phases of a 3D scanning session (range data alignment, merge and simplification). 相似文献
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本文从主机信息资源安全角度考虑,介绍了漏洞扫描器的概念和工作原理,制订了基于漏洞扫描器的主机安全策略,强调了漏洞扫描器的使用权和自身安全性问题,并给出了漏洞扫描器的使用和维护方法,从而能够最大限度发挥基于主机的漏洞扫描器的效用。 相似文献
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结合三维激光扫描测量原理,介绍了使用激光扫描仪对溶洞实例进行的扫描研究方法,分析和阐述了数据处理的方法及其实现,证明了三维激光扫描技术在洞体扫描的形状、大小探测方面有着较大的优越性。 相似文献
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为充分发挥多媒体课件在测控电路课程教学中的作用,利用电路仿真软件Multisim制作了容器自动输送与喂料演示系统,解释控制电路与传感器检测电路作用;利用三维足形扫描仪制作的扫描视频介绍平台直线运动及利用结构光测量过程中涉及的单元电路;利用数控加工仿真系统模拟工作台移动及加工过程,了解数控铣床控制系统及有关电路组成。制作的三个典型测控系统课件已用于测控电路、现代电子技术及应用等课程的教学,提高了教学质量。 相似文献