排序方式: 共有11条查询结果,搜索用时 15 毫秒
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结合某电网建设中电气工程自动化技术的应用案例,简单介绍了电网建设工程的开展情况,论述了电气工程自动化技术在电网建设中的应用优势,并对电气工程自动化技术在电网建设中的具体应用进行了分析. 相似文献
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将谱图理论引入图像检索领域,将原图像按照灰度级进行划分,针对各个图像灰度分布的差异提出自适应划分方法,把图像的每个划分都看作一个子图,利用谱图理论计算各个子图之间的Normalized cut(Ncut),生成一个Ncut矩阵,在生成的Ncut矩阵中,计算每一个子图与其余子图的相似关系,提取原图像的特征向量,达到检索的目的。实验结果表明,该方法优于传统方法。 相似文献
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In order to improve the adaptiveness of TV/L2-based image denoising algorithm in differ- ent signal-to-noise ratio (SNR) environments, an iterative denoising method with automatic parame- ter selection is proposed. Based upon the close connection between optimization function of denois- ing problem and regularization parameter, an updating model is built to select the regularized param- eter. Both the parameter and the objective function are dynamically updated in alternating minimiza- tion iterations, consequently, it can make the algorithm work in different SNR environments. Mean- while, a strategy for choosing the initial regularization parameter is presented. Considering Morozov discrepancy principle, a convex function with respect to the regularization parameter is modeled. Via the optimization method, it is easy and fast to find the convergence value of parameter, which is suitable for the iterative image denoising algorithm. Comparing with several state-of-the-art algo- rithms, many experiments confirm that the denoising algorithm with the proposed parameter selec- tion is highly effective to evaluate peak signal-to-noise ratio (PSNR) and structural similarity 相似文献
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某汽车厂焊装车间的空中积放式推杆悬挂牵引链节在使用过程中有两节断裂,其中一节为使用1a(年)后两侧均出现断裂,另一节为使用10a后在链节一侧出现断裂。采用宏观观察、化学成分分析、硬度测试、金相检验、宏微观断口形貌分析等方法,对链节断裂失效的原因进行了分析。结果表明:1a断裂失效链节是由于疲劳及受力不均导致的过载断裂;10a断裂失效链节整个断口上几乎都是疲劳扩展区,为疲劳断裂。 相似文献