合成孔径雷达图像船舶自动检测新方法

针对传统SAR图像船舶自动检测方法在检测近岸目标时存在的普适性不强、计算量大、自动识别差的缺陷,提出了一种新的迭代阈值分割算法,通过消除噪声、分离目标检测出船舶目标,对比验证该方法能自动、快速、准确地检测近岸船舶目标。     

蠡河特大桥深水墩基础施工工艺

结合蠡河特大桥的施工经验,简要介绍在软土地基中深水基础钢板桩围堰的施工工艺、水下吸泥封底砼的施工方法及质量控制要点.     

浅谈沥青表面处置路面养护

公路养护,它是阐述公路路基、路面及其相关构筑物的施工和养护技术问题,建养并重,协调发展,已为大家所共识,已成为当前公路建设的基本方针,现就几年来的工作实践作以下简述。     

加强对外购件质量的控制—推进多品种市场质量保证体系的实施

通过对我厂以前外购件质量控制的反思，引入了对供应商实施产品诞生阶段的质量管理和综合业绩评价，并辅以质量否决和连带索赔制的实施来达到控制外购件质量的目的。论文对上述制度的实施方式进行了论述，同时，结合前一阶段我厂在这方面的实践，提出了目前存在的不足及改进方向，从而为加强外购件质量控制，推进多品种市场质量保证体系的实施提供了有效的手段。     

Online sequential extreme learning machine based multilayer perception with output self feedback for time series prediction

This study presents a time series prediction model with output self feedback which is implemented based on online sequential extreme learning machine. The output variables derived from multilayer perception can feedback to the network input layer to create a temporal relation between the current node inputs and the lagged node outputs while overcoming the limitation of memory which is a vital part for any time-series prediction application. The model can overcome the static prediction problem with most time series prediction models and can effectively cope with the dynamic properties of time series data. A linear and a nonlinear forecasting algorithms based on online extreme learning machine are proposed to implement the output feedback forecasting model. They are both recursive estimator and have two distinct phases: Predict and Update. The proposed model was tested against different kinds of time series data and the results indicate that the model outperforms the original static model without feedback.     

高陡边坡下隧道洞口区稳定性研究

为研究隧道开挖工法对高陡边坡下隧道洞口区稳定性的影响,文章依托某实际隧道工程,采用FLAC3D软件建立了相应的三维模型,对三台阶法、环形预留核心土法和CRD法开挖施工进行模拟分析,并与现场监测结果进行对比,得到如下结论:(1)对比三种工法开挖时隧道围岩和边坡变形可知,CRD法为最适宜,采用该工法开挖隧道时,洞口区围岩和边坡变形最小;(2)数值模拟所得围岩及边坡变形变化规律与现场监测结果基本一致,故采用数值法进行隧道施工优化具有一定的可行性;(3)为减少隧道开挖对洞口区边坡的影响,采用CRD法进行隧道开挖,结合锚索预加固可有效提高边坡稳定性。