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Noise and light pollution affect breeding habits in birds（图）
Noise light pollution breeding habits birds
2020/12/11
Looking for a bird's-eye view of human impacts? A new study, published in the journal Nature, provides the most comprehensive picture yet of how human noise and light pollution affect birds throu...
CONSTRUCTION THEORY AND NOISE ANALYSIS METHOD OF GLOBAL CGCS2000 COORDINATE FRAME
CGCS2000 globalization coordinate time series Noise analysis construction of geocentric reference frame Geodetic datum
2018/5/14
The definition, renewal and maintenance of geodetic datum has been international hot issue. In recent years, many countries have been studying and implementing modernization and renewal of local geode...
SAE 2017 Noise and Vibration Conference and Exhibition
Passive and Active NVH Control Vehicle Subsystem NVH
2016/7/21
The SAE 2017 Noise and Vibration Conference and Exhibition is the premier technical event dedicated to mobility noise, vibration and harshness. Held biennially, this conference serves as a forum for l...
The Noise-Sensitivity Phase Transition in Compressed Sensing
Approximate Message Passing Lasso Basis Pursuit Minimax Risk over Nearly- Black Objects Minimax Risk of Soft Thresholding
2015/8/20
Consider the noisy underdetermined system of linear equations: y = Ax0 + z0, with n N measurement matrix A, n < N, and Gaussian white noise z0 N(0; 2I). Both y and A are known, both x0 and z0 are...
The Effect of System Stochastic Noise on SINS Initial Alignment
捷联惯导系统 多位置对准 单轴旋转 卡尔曼滤波 系统随机噪声
2014/4/17
捷联惯导系统初始对准系统状态方程所描述的状态统计信息，受系统随机噪声驱动，系统随机噪声通过噪声驱动阵作用于状态。常用系统状态方程的系统噪声驱动阵为单位阵。经过分析发现系统噪声驱动阵为单位阵是有条件的；通过推导给出了系统状态方程可以简化此种形式的条件；指出了在水平陀螺、加速度计随机噪声水平不同时，若使用简化系统模型会引起状态估计误差；并通过单轴旋转多位置对准仿真实验进行了验证。仿真结果表明：若水平陀...
Assessment of Underwater Anthropogenic Noise Associated with Construction Activities in Bechers Bay, Santa Rosa Island, California
Acoustic Monitoring Pile Drilling Mitigation Channel Islands
2013/3/12
Acoustic monitoring and mitigation of underwater construction noise was conducted during marine pier demolition and reconstruction activities near Santa Rosa Island, California. Activities spanned two...
Post-processing Method to Reduce Noise while Preserving High Time Resolution in Aethalometer Real-time Black Carbon Data
Smoothing Aerosol Carbonaceous Soot Aethalometer
2016/3/28
Real-time aerosol black carbon (BC) data, presented at time resolutions on the order of seconds to minutes, is desirable
in field and source characterization studies measuring rapidly varying concent...
Neural Network Modelling of Outdoor Noise Levels in a Pilot Area
Noise Outdoor noise Noise modelling Artificial neural networks
2009/10/12
Noise measurements were made for 16 relevant outdoor points in the central campus area of Yidz Technical University. All measurements were performed in accordance with Turkish Standards using an HD ...
Impact of Tanneries on Ambient Noise Levels in Kano, Nigeria
Ambient Noise Levels industries
2008/10/27
Ambient noise levels were measured both indoors and outdoors of eight tanning industries known to be operating between 75 – 100 % of the working days per annum in Kano, Nigeria to assess the impact of...