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Experimental results indicate that the improved algorithm acquires good effect of the nonuniformity correction.

在此基础上,提出了利用探测器响应的分段线性模型对该算法进行扩展,以有效地克服响应非线性对非均匀性校正的影响。

The wavelet analysis belongs to the harmonic analysis, is one time domain, the frequency range analysis, has the multi- resolution characteristic, it ingeniously uses in the non- even distribution the resolution through the translation invariable window observation unstable signal.

小波分析属于调和分析,是一种时域、频域分析,具有多分辨率特性,它巧妙地利用非均匀分布上的分辨率通过平移的可变窗口观察非稳信号。

In the case of homogeneous broadening only one mode can normally oscillate.

对于均匀加宽的情况,只有一个模能正常地振荡。

By analyzing the problem of hydrological 3D spatial dispersion in 3D finite differential numeric simulation of porous groundwater flow, as well as discontinuous spatial distribution and asymmetric thickness of porous aquiferous strata and partitive groundwater stratum, the paper presents the GIS-based technique of 3D spatial dispersion of porous aquiferous stratum system. Besides, the paper puts forward the 3D spatial dispersion method of irregular hexahedral unit based on GIS to guarantee to the greatest degree the uniqueness of the stratum types among the dispersed units and improve the precision of 3D spatial dispersion.

分析了目前孔隙地下水流三维有限差分数值模拟中对含水层系统三维空间离散存在的问题,针对自然界孔隙含水层与隔水层空间分布的不连续性与厚度的不均匀性,研究了基於GIS的孔隙含水层系统三维空间离散实现的技术路线,提出了基於GIS与不规则六面体元的孔隙含水层系统的三维空间离散方法,最大限度地保证了离散体元中含水层类型的单一性,提高了孔隙地下水流模拟模型三维空间离散的精度。

By analyzing the problem of hydrological 3D spatial dispersion in 3D finite differential numeric simulation of porous groundwater flow, as well as discontinuous spatial distribution and asymmetric thickness of porous aquiferous strata and partitive groundwater stratum, the paper presents the GIS-based technique of 3D spatial dispersion of porous aquiferous stratum system .

分析了目前孔隙地下水流三维有限差分数值模拟中对含水层系统三维空间离散存在的问题,针对自然界孔隙含水层与隔水层空间分布的不连续性与厚度的不均匀性,研究了基于GIS的孔隙含水层系统三维空间离散实现的技术路线,提出了基于GIS与不规则六面体元的孔隙含水层系统的三维空间离散方法,最大限度地保证了离散体元中含水层类型的单一性,提高了孔隙地下水流模拟模型三维空间离散的精度。

Capillary condensation and the hysteresis loops of methane in layered pillared nano-material were observed.

该方法有效地表征了活性炭的几何非均匀性。

Major results were summarized as follows:(1) A total of 58 tree species from 53 genera in 36 families among which 8 species were Rosaceae, 5 species were Liliaceae, 5 species were Eriaceae, 3 species were Ranunculaceae, 3 species were Compositae, 2 species were Cupressaceae, 2 species were Caprifoliaceae, 2 species were Umblliferae, and other 28 tree species were only one receptively. These were recorded in the 8 plots of the A. georgei var. smithii forest;(2) Number of families, genera, species and Margalef index correlated negatively with altitude (P.05), with a peak at 3600 m.(3) Shannon-Wiener index correlated negatively with altitude (P.01), and maintained stable at the altitudes between 3700~4100 m, evenness with altitudes, however, this trend was insignificant.(4) Jaccard index increased sharply with increasing altitude at the altitudes between 3600~4100 m, and was lower between different vegetation types at the altitudes between 4100~4200. Cody index β(subscript c decreased with an increasing altitude, but there were 2 troughs between 4000~4100 m and 4200~4300 m.(5) Maximum tree height H(subscript max and HH(subscript max=37 mcorrelated negatively with altitude (P.05); but basal area and BA BA(subscript max=5.3m^2 correlated with altitudes, however, this trend was insignificant.

结果表明:(1)在调查的8个急尖长苞冷杉林样地内共有植物58种,分属于36科53属,其中植物较多的科有蔷薇科8种、百合科5种、杜鹃花科5种、毛茛科3种、菊科3种、柏科2种、忍冬科2种、伞形科2种,其余的28科各只有1个种;(2)物种科、属、种数、Margalef指数D(下标 M与海拔存在显著的负相关性(P.05),在分布急尖长苞冷杉最低海拔3600m处出现物种丰富度的最大值;(3)多样性指数与海拔之间有极显著的负相关性(P.01),并且在3700~4100m之间多样性指数保持稳定;均匀度指数与海拔梯度之间存在负相关性,但不显著;(4)Jaccard指数C(下标 j在海拔3600~4100m随海拔的升高而升高,在生境过渡带的4100~4200m之间Jaccard指数C(下标 j较低;Cody指数β(下标 c随海拔的升高呈下降的趋势,但在4000~4100m和4200~4300m 海拔区间出现2个低谷;(5)最大树高H(下标 max和最大胸径DBH(下标 max与海拔之间存在显著负相关性(P.05);胸高断面积之和和立木密度与海拔之间存在负相关性,但不显著。

The distribution of Sn in α-Mg is basically uniform and the grain can be refined significantly with 1.5%Sn addition, however the grain presents the trend to be coarse with excessive Sn content.

微量Sn基本均匀分布在合金基体上,并有效地细化晶粒,Sn质量分数为1.5%时细化效果显著,多量的Sn有使晶粒粗大的倾向。

In the case of the same sensor number,this method which adopts appropriate array geometry arrangement can improve the resolvability of DOA estimation more obviously than the uniform linear array.

在阵元数一定的情况下,该方法可使阵列的方位分辨率较之均匀线阵有较大的改善,而且还克服了一般稀布线阵方位估计模糊和去相关能力差的缺点,成功地将空间平滑MUSIC这一经典方法用于非等矩阵。

The case of uniform illumination is simulated and it is found that the method can recover Zernike coefficients of the original phase well while avoiding complicated boundary condition and reducing computation time, and furthermore the root-mean-square value between the corrected phase and the original phase is acceptable even when noise is added.

对均匀照明的情形进行了仿真,发现该方法不仅可以避免复杂的边界条件,减少运算时间,而且还能够较好地恢复出原始波前的泽尼克系数,即便在加噪的情况下,修正相位与原始相位的均方根误差也在可以接受的范围内。

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