Results 51 to 60 of about 14,950 (229)
Remote Sensing Image Enhancement Based on Orthogonal Wavelet Transformation and Pseudo-color Image Processing [PDF]
, 2010 针对基于正交小波分析的图像增强技术一般只适用于黑白图像;而伪彩色处理技术不能够充分处理图像中某些细节信息的缺陷,提出了基于正交小波分析和伪彩色的遥感图像增强处理方法;实验结果表明,增强后的遥感图像无论在视觉效果上还是在噪声特性上都有了很大的改善;该方法简便易行且计算量小,在应用中有较大的灵活性;该方法还具有运算速度快和可操作性强等特点,在遥感图像增强研究方面具有广泛的应用前景。Image enhancement technique based on wavelet analysis is only ...
刘美珍, 周健, 李绍滋, 王智文
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结合Attention U-Net与瓶颈检测的肺部细胞图像分割方法
智能科学与技术学报, 2022 肺部病理图像具有边界模糊、细胞重叠交织等特点，为了解决细胞分割问题，提出结合Attention U-Net与瓶颈检测的肺部细胞图像分割方法。首先对采集到的图像进行双边滤波和拉普拉斯锐化处理，在去除噪声的同时突出细胞边缘细节，加大目标物与背景的对比；然后对Attention U-Net进行训练，利用训练的模型对病理图像进行分割，得到细胞区域；在模型分割结果的基础上，以面积、周长、圆度为筛选条件建立判别模型，区分单个细胞和重叠细胞；对细胞重叠区域采用瓶颈检测方法确定分离点，采用椭圆拟合方法进行边界修正 ...
邵虹, 左常升, 张萍
doaj
European Policy Analysis, Volume 11, Issue 1, Page 10-31, Winter 2025.Abstract This paper studies how scientists participated in policy debates during the COVID‐19 pandemic in Switzerland not only by telling facts but also by telling stories. It combines insights from Narrative Policy Framework and science communication literature with a conceptualization of scientific advice to study how scientists used narratives and ...
Jule Ksinsik
wiley +1 more source
Pure ti-based mixed oxides prepared from the thermal decompositions of molecular precursors of peroxo complexes coordinated with tris(hydroxycarbonylmethyl)amine trivalent anion titanate(IV) [PDF]
, 2004 Different peroxo titanate (IV) complexes coordinated with tris(hydroxycarbonylmethyl) amine trivalent anion including ammonium, potassium, strontium and barium salts (NH4)(4)[Ti2O(O-2)(2)(ta)(2)]-4H(2)0 (1), K-4[Ti2O(O-2)(2)(ta)(2)]-6H(2)O (2), Sr-2[Ti2O(
DENG, Yuan-Fu +5 more
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Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Zoos and aquariums are well placed to connect visitors with the issues facing biodiversity globally and many deliver interventions that seek to influence visitors’ beliefs and behaviors with respect to conservation. However, despite primary studies evaluating the effect of such interventions, the overall effect of engaging with zoos and the ...
Xavier McNally +4 more
wiley +1 more source
Pure Ti-based Mixed Oxides Prepared from the Thermal Decompositions of Molecular Precursors of Peroxo Complexes Coordinated with Tris(hydroxycarbonylmethyl)amine Trivalent Anion Titanate(Ⅳ) [PDF]
, 2004 在pH =2 5～ 4 0的条件下 ,以四氯化钛、过氧化氢和氨三乙酸为原料反应得到四种过氧酸钛配合物 (NH4) 4 [Ti2 O (O2 ) 2 (ta) 2 ]·4H2 O (1) ,K4[Ti2 O(O2 ) 2 (ta) 2 ]·6H2 O (2 ) ,Sr2 [Ti2 O(O2 ) 2 (ta) 2 ]·10H2 O (3 )和Ba2 [Ti2 O(O2 ) 2 (ta) 2 ]·10H2 O (4 )(H3 ta =C6H6O6N) .配合物的EA ,UV vis ...
周朝晖, 洪麒明, 邓远富
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New method of detecting special function of decomposition map(基于分解图检测特殊函数的新方法)
Zhejiang Daxue xuebao. Lixue ban, 2008 特殊布尔函数在电路设计中有着独特的优点.本文从特殊函数的定义出发，导出了基于分解图的冗余函数、线性函数、对称函数、自反函数和自双反函数的相关定理，着重介绍了基于分解图的相关定理在特殊函数检测中的应用，并以实例加以说明.本文为超大规模集成电路中单元电路的设计与化简提供了新的方法，对进一步完善布尔代数系统具有一定的实际应用意义.
ZHAOMei-ling(赵美玲) +1 more
doaj +1 more source
Landscape‐scale predictions of future grassland conversion to cropland or development
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Grassland conservation planning often focuses on high‐risk landscapes, but many grassland conversion models are not designed to optimize conservation planning because they lack multidimensional risk assessments and are misaligned with ecological and conservation delivery scales.
Kevin W. Barnes +2 more
wiley +1 more source
基于Surfacelet 变换的3D Context 模型视频去噪新方法 [PDF]
, 2008 本文将3D Context 模型应用于Surfacelet 变换域,提出一种新的视频去噪方法. Surfacelet 变换(ST) 是一种新的3D 变换,具有多方向分解、各向异性和低冗余度等性质. 根据视频信号ST 域内系数和噪声分布的特征,将2D Context 模型拓展到3D ,按照能量分布将ST系数分成多个子块,每个子块有独立的能量和阈值估计. 实验结果表明,本文算法噪声抑制效果明显优于分层2D 去噪声方法和其它现有的3D 方法,去噪视频的PSNR 值提高了约2dB.
屈小波, 肖弘智, 闫敬文
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Jixie chuandong, 1991 当组成复合轮系的简单行星轮系的个数较多时,复合轮系的运动分析就非常繁杂。本文提出一种研究复合行星轮系运动的图解法,利用简单的线图即可求出其中任一基本构件的运动,不必作辅助计算。根据线图上的几何关系,还可迅速写出传动比的准确计算公式,比之用分析计算法来推导要简便快捷得多。除了一个自由度的复合轮系外,本图解法还可解决多个自由度的复合行星轮系的问题。
何廷樾
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