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Bridge shape is the important indicator to estimate the safety of the bridge. A bridge shape measurement system based on fiber optic gyroscope is builded up to survey the continuous shape of bridge. This measurement system comprises angular velocity sensor, linear velocity sensor, position sensor and etc. The bridge shape survey using the leveling measurement and bridge continuous shape measurement...
With the TM images in 1990 and 2005 and in the support of RS and GIS techniques, this paper applies the maximum likelihood classification and the Fragstats3.3 calculation software to calculate and analyze 9 landscape indices in three counties, Heng dong County, Hengshan County and Hengyang City. The studies have shown that: 1. For the three studied cities, the reduction of woodland is largest than...
Ancylis sativa Liu is a kind of insects to cause severe damage to jujube trees. This paper studies the recognition of Ancylis sativa Liu from catchers via using computer vision technique. The image of a Ancylis sativa catcher generally shows not only Ancylis sativa but also other objects. Consequently it leads to that the image has a complicated background and an uncertain interesting region. Ancylis...
The paper presents a multi-density clustering algorithm based on grid adjacency relation (GAMD) using data distribution characteristics within units, which is reflected by the unit density and the center of mass. In order to determine the unit boundary, the algorithm measures the similarity between units by the relative density of units and relative distance of center of mass. Goodness of fit is proposed...
In this paper, highly dispersed copper oxide (CuO) nanoparticles with different size and morphology have been successfully prepared by a quick-precipitation method in DMAC-water mixed solvent. The as-prepared CuO nanoparticles were characterized by high resolution transmission electron microscopy (HRTEM) and x-ray diffraction (XRD). Several kinds of CuO particles with different morphology were obtained...
The vibration signals of the actual structure are mixed in various noises and the analysis result is inaccurate. The independent component analysis (ICA) method is introduced to denoise. Because of the statistical independence between noise and vibration signal, which accords with the requirement of ICA arithmetic, the noise is able to be separated from sensor signals. A noise channel is increased...
Since the security accident of structures occurred continually in recent years, the damage identification is paid close attention by scholars. The support vector machine (SVM) as a new method of statistical theory is applied to identify structural damage in this paper. The relative change quantity of modal flexibility, used as the characteristic index of damage identification, is input in SVM classifier...
This paper mainly researches the 3D point cloud of Delaunay algorithm. Based on the advantages of the Delaunay divide-conquer algorithm and point-by-point insertion algorithm, we provide a kind of adaptive algorithms which has the ability to adapt three-dimensional border point and is able to optimize the algorithm by using point cloud block density distribution of dynamic management approach. Meanwhile,...
Inspection of solder joint is a critical step in the assembly of Printed Circuit Board (PCB) which requires high reliability. Non-destructive inspection technology based on image captured by Charge Couple Device (CCD) has been widely used in a production of PCB because of their excellent characters. This paper deals with the reconstruction of the solder jointpsilas surface in PCB based on shape form...
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