To investigate the activities of typical night-migrating birds under the light with various spectral compositions during autumn migration,23 Siberian Rubythroat Luscinia calliope were tested under colorful LED lights ...To investigate the activities of typical night-migrating birds under the light with various spectral compositions during autumn migration,23 Siberian Rubythroat Luscinia calliope were tested under colorful LED lights with different wavelengths and mixed white at 100 lx.Using behavior response as an indicator,the quantitative relationship between the activity level of test birds and illumination stimulation duration was acquired.It was found that the visible light sensitivity of Siberian Rubythroat was the highest for the 478 nm turquoise and decreased towards the 622 nm red.展开更多
基金Supported by Science and Technology Support Program of Beijing(No.Y0604017040391)National Natural Science Foundation of China(No.51208350)Doctoral Fund of Ministry of Education of China(No.20100032110047)
文摘To investigate the activities of typical night-migrating birds under the light with various spectral compositions during autumn migration,23 Siberian Rubythroat Luscinia calliope were tested under colorful LED lights with different wavelengths and mixed white at 100 lx.Using behavior response as an indicator,the quantitative relationship between the activity level of test birds and illumination stimulation duration was acquired.It was found that the visible light sensitivity of Siberian Rubythroat was the highest for the 478 nm turquoise and decreased towards the 622 nm red.
文摘对采用可见光通信(Visible Light Communication,VLC)的车辆定位方法进行了研究,研究、分析并比较了4种基于VLC的车辆定位方法;基于假设的系统模型和接收到的VLC信号数学模型,分析了每种方法所采用的TX位置与系统物理参数的测量过程,利用这些参数与TX位置之间的几何关系构成一个观测模型,获得车辆位置估计;基于VLC定位方法的观测模型得到每种方法关于位置精度的Cramer-Rao下界(Cramer-Rao Lower Bound,CRLB);在一般有限传播延迟、视距(Line of Sight,LoS)和加性高斯白噪声(Additive White Gaussian Noise,AWGN)的VLC信道模型下,对于真实道路的避碰和列队行驶场景,仿真了每种方法的系统物理参数测量,并基于测量结果,对每种方法的定位精度的CRLB进行了评价。
基金浙江省“十二·五”农业重大成果转化工程“毛竹林高效生态可持续经营技术示范推广”(2012T201-02)联合国77国集团佩罗基金项目“Assessment of bamboo shoot development for food in Africa and Latin America”(L-063/2011)