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Log in 提交 IUTAM Symposium on Acoustic/elastic metamaterials, their design and applications
Login Submit IUTAM Seminar Sound waves Elastic material
2017/12/13
The last decade has witnessed an increasing interest in the study of acoustic/elastic metamaterials and their potential engineering applications. Acoustic/elastic metamaterials are a class of composit...
LIDAR-INCORPORATED TRAFFIC SIGN DETECTION FROM VIDEO LOG IMAGES OF MOBILE MAPPING SYSTEM
Traffic Sign Detection Mobile Mapping System RANSAC Random Forest Camshift Kalman Filtering
2016/7/5
Mobile Mapping System (MMS) simultaneously collects the Lidar points and video log images in a scenario with the laser profiler and digital camera. Besides the textural details of video log images, it...
Log-det heuristic for matrix rank minimization with applications to Hankel and Euclidean distance matrices
Positive semi-definite matrix convex sets functions half positive definite matrix distance data
2015/8/11
We present a heuristic for minimizing the rank of a positive semidefinite matrix over a convex set. We use the logarithm of the determinant as a smooth approximation for rank, and locally minimize thi...
The scaling in the overlap region of turbulent wall-bounded flows has long been the source of
controversy, and until recently this controversy could not be addressed because measurements
did n...
Lithological Study and Mapping of Barind Tract Using Borehole Log Data with GIS: In the Context of Tanore Upazila
Lithology Barind Tract Borehole Log Tanore
2013/3/5
In this paper the lithological study and mapping of Barind Tract is done by using irrigation boreholes log data in the context of an upazila under Barind Tract in northwest Bangladesh. Northwestern pa...
An O(log n) Distributed Approximation Algorithm for Local Broadcasting in Unstructured Wireless Networks
Local Broadcasting Unstructured Wireless Networks
2012/12/4
The unstructured multi-hop radio network model, with asynchronous wake-up, no collision detection and little knowledge on the network topology, is proposed for capturing the particularly harsh charact...
TESTING goGPS LOW-COST RTK POSITIONING WITH A WEB-BASED TRACK LOG MANAGEMENT SYSTEM
Web based Cooperation Software GPS/INS Accuracy,Real-time
2014/6/12
Location-based online collaborative platforms are proving to be an effective and widely adopted solution for geospatial data collection, update and sharing. Popular collaborative proje...
针对医学X胸片影像对比度低，视觉效果差，不利于临床医师对X胸片肺部节点进行检诊的问题，在对X胸片肺部节点图像特点以及传统拉普拉斯高斯图像增强算子深入分析的基础上，提出一种基于视觉及方向尺度拉普拉斯高斯（Laplace of Gaussion，LoG）算子的医学X胸片肺结节增强方法。该方法是在传统拉普拉斯高斯滤波算子的基础上，通过对不同方向纹理引入不同算子尺度，并考虑视觉因素，进行视觉矫正实现的。实...
AODB中基于Log快速恢复编织状态的方法
方面 数据库 编织
2010/1/13
面向方面数据库系统研究的一个关键难点是在数据库管理系统(DBMS)中内建方面编织器。基于已有的需要时编织和编织历史机制，提出一种基于Log的编织实现方法。该方法不仅给出需要时编织、重编织和编织历史的具体实现，还分别给出系统在正常或异常重启时，基于该方法的快速恢复方面编织状态的机制。该方法是对在DBMS中内建方面编织器研究的较好补充和完善。
Turbo译码中的Log-MAP折线逼近法
通信技术 纠错编码 折线逼近法
2009/10/20
为了在降低Turbo系统译码延时的同时仍保证其优良的低误比特率性能，本文提出折线逼近法方案。该方案只用比较器和加减法，就能在保证Turbo码低误比特率的前提下，有效降低系统延时和译码复杂度。仿真结果表明：折线逼近法的译码性能大大优于MaxLogMAP方法，同时比二次幂逼近算法降低1.5倍以上的系统延时。
Can Trip Planner Log Files Analysis Help in Transit Service Planning?
Trip Planner Log Files Analysis Transit Service Planning
2009/10/19
Transit trip planners are now found on most transit authority websites. This feature gives transit users a full itinerary from a point of origin to a destination. The web server on which the trip plan...
结合LOG算子和小波变换的图像边缘检测方法
LOG 小波变换 边缘检测
2009/9/30
针对目前常用的边缘检测方法对噪声比较敏感，测得的边缘比较粗糙等现象，在传统边缘检测方法的基础上提出了一种基于数据融合的边缘检测方法。该方法分别采用改进的LOG算子和离散小波变换对原始图像进行边缘检测，建立相应的融合原则，并将两种方法检测出来的边缘进行数据融合，得到最终的图像边缘。实验证明，该方法结合了两种检测方法的优点，有效地提高了边缘检测准确性，获得了比较理想的边缘检测效果。
...
基于Log似然比的特征选择算法
文本分类 向量空间模型 特征选择
2009/9/27
针对基于向量空间模型文本分类系统中特征选择算法存在的问题，提出一种基于Log似然比的特征选择算法，引进Log似然比统计量，在考虑稀有事件对分类结果产生正面影响的同时，较好地控制其对分类产生的负面影响。采用KNN分类方法，将Log似然比特征选择算法与典型特征算法进行比较，实验结果表明，该算法能够获得良好的性能。
轮廓曲线的LoG变换及图像共变区域的检测
轮廓曲线 Laplacian of Gaussian 角点 轮廓方向 共变区域
2010/3/29
本文将LoG(Laplacian of Gaussian)变换应用到轮廓曲线上,其范数的平方具有稳健的曲率特性, 由此构造了轮廓角点的响应函数;在此基础上,结合轮廓LoG所检测的角点和角点邻域内轮廓方向的尺度共变性设计了一种新的关于旋转和尺度共变的特征区域检测算法.最后, 利用相关度准则对多组受干扰的图像进行特征共变区域匹配,实验结果验证了所提出的共变特征区域检测算法具有计算简单、容易实现和较强的...
State-Space Synthesis of Current-Mode First-Order Log-Domain Filters
Log-domain filters current-mode circuits state-space synthesis
2009/7/28
This paper proposes current-mode first-order log-domain filters, which are systematically derived using the state-space synthesis procedure. First-order low-pass, high-pass, and all-pass responses are...