搜索结果: 1-15 共查到“知识库 理学 FIR”相关记录17条 . 查询时间(0.5 秒)
A robust control design for FIR plants with parameter set uncertainty
Robust control design plant parameter set oval
2015/8/12
A method of computing the finite-horizon control inputs for FIR plants whose parameters are only known to lie in a set is proposed. The parameter set is assumed to be described by an ellipsoidal bound...
FIR filter design via spectral factorization and convex optimization
Finite impulse response filter filter coefficient variables spectral decomposition linear and nonlinear convex programming
2015/8/11
We consider the design of finite impulse response (FIR) filters subject to upper and lower bounds on the frequency response magnitude. The associated optimization problems, with the filter coefficient...
In Chebyshev finite-impulse response (FIR) equalization, we design an FIR filter that minimizes the Chebyshev equalization error, i.e., the maximum absolute deviation between the equalized and the des...
IDENTIFICATION OF A COMPLETE 160 μm FLUX-LIMITED SAMPLE OF INFRARED GALAXIES IN THE ISO LOCKMAN HOLE 1 deg2 DEEP FIELDS: SOURCE PROPERTIES AND EVIDENCE FOR STRONG EVOLUTION IN THE FIR LUMINOSITY FUNCTION FOR ULIRGs
starburst-active galactic nucleus (AGN) composite AGN spectral types
2014/12/20
We have identified a complete, flux-limited (S 160>120 mJy) sample of 160 μm selected sources from Spitzer observations of the 1 deg2 Infrared Space Observatory (ISO) Deep Field region in the Lockman ...
Range-wide chloroplast and mitochondrial DNA imprints reveal multiple lineages and complex biogeographic history for Douglas-fir
chloroplast mitochondrial DNA imprints biogeographic history for Douglas-fir
2011/12/31
The contemporary genetic structure of species offers key imprints of how organisms responded to past geological and climatic events, which have played a crucial role in shaping the current geographica...
The magnetic field in the NGC 2024 FIR 5 dense core
individual ISM magnetic fields Polarization Stars formation Techniques interferometric
2010/11/10
We used the Submillimeter Array (SMA) to observe the thermal polarized dust emission from the protostellar source NGC 2024 FIR 5. The polarized emission outlines a partial hourglass morphology for the...
A closer view of the radio-FIR correlation: disentangling the contributions of star formation and AGN activity
Galaxy Astrophysics (astro-ph.GA)
2010/12/23
We extend the Unified Radio Catalog, a catalog of sources detected by various (NVSS, FIRST, WENSS, GB6) radio surveys, and SDSS, to IR wavelengths by matching it to the IRAS Point and Faint Source cat...
通带可调相位 FIR 数字滤波器及其设计
通带可调相位 FIR 数字滤波器
2009/9/18
常见的 FIR 数字滤波器大致可分为两类:一类是线性相位滤波器;另一类是极小相位滤波器,这两种类型的滤波器,其相位响应均不可调.第一种滤波器,其群延迟为((N-1)T)/2,其中 N 为滤波器长度,T 为采样周期.以 N=60,T=0.2秒的线性相位滤波器为例,它的相位响应为...
Applying MERLIN for modelling nitrate leaching in a nitrogen saturated Douglas fir forest in the Netherlands after decreased atmospheric nitrogen input
refractory organic matter atmospheric nitrogen input nitrate leaching
2009/6/5
The MERLIN model was applied on the results of a field-scale manipulation experiment with decreased nitrogen (N) deposition in an N saturated forest ecosystem in the Netherlands. The aim was to invest...
Dynamic nitrogen deposition thresholds during forest stand development in a Douglas fir forest analysed with two nitrogen models SMART2 and MERLIN
nutrient throughfall forest floor water spatial variability
2009/3/17
This study focuses on spatial variability of throughfall water and chemistry and forest floor water content within a Douglas fir (Pseudotsuga menziesii, Franco L.) forest plot. Spatial patterns of wat...
Spatial variability of throughfall water and chemistry and forest floor water content in a Douglas fir forest stand
nutrient throughfall forest floor water spatial variability
2009/3/17
This study focuses on spatial variability of throughfall water and chemistry and forest floor water content within a Douglas fir (Pseudotsuga menziesii, Franco L.) forest plot. Spatial patterns of wat...
Spatial variability of throughfall water and chemistry and forest floor water content in a Douglas fir forest stand
nutrient throughfall forest floor water spatial variability
2009/3/17
This study focuses on spatial variability of throughfall water and chemistry and forest floor water content within a Douglas fir (Pseudotsuga menziesii, Franco L.) forest plot. Spatial patterns of wa...
GM-RC,AJ-RC FIR系统辨识方法的改进
高阶累量 非最小相位FIR系统 参数估计
2008/12/31
本文讨论基于高阶累量辨识非最小相位FIR系统问题.在文献[1,2]提出的GM-RC,
AJ-RC算法的基础上,提出了一种改进算法.模拟实验结果表明:改进算法有效地抑制了传
播误差并进一步简化了运算,因而性能更加优越.
非最小相位FIR系统的自适应辨识
自适应系统辨识 非最小相位系统 高阶累量
2008/12/26
提出了一种基于线性代数方程组约束和梯度法的非最小相位FIR系统的自适应辨
识算法.选用的线性方程组具有列满秩的系数矩阵,保证了系统参数的唯一可识别性.由于只
采用高阶累量,故能够抑制任何高斯有色噪声的影响.重点讨论了梯度法中步长的选择,提出
了收敛速度最快的变步长.仿真实验的结果证实了算法的有效性.
基于琼斯矩阵的FIR晶体光滤波器设计方法
2007/8/20
FIR晶体光滤波器由夹在两个偏振片之间的N个厚度相同的晶片构成,设计过程中需要根据要求的频率响应求出各个晶体波片的光轴方向和输出端偏振片的通光方向.提出了一种基于琼斯矩阵的反向递推设计方法.FIR晶体光滤波器的琼斯矩阵是各个晶片以及偏振片琼斯矩阵的乘积,利用这一关系可以建立简单的反向递推关系,并计算出与输出偏振分量对应的正交偏振分量,通过迭代运算确定所有元件的角度参数.实例设计的结果与使用其它方法...