【摘 要】
：
A plants adaptation to its environment is one of the most important issues in evolutionary biology. Mangroves are trees that inhabit the intertidal zones with high salinity, while salt tolerance compe
【出 处】
：
Chinese Science Bulletin
论文部分内容阅读
A plants adaptation to its environment is one of the most important issues in evolutionary biology. Mangroves are trees that inhabit the intertidal zones with high salinity, while salt tolerance competence of different species varies. Even congeneric
其他文献
HDR高动态范围技术在3D游戏中已广泛使用,所谓高动态范围,指的是画面同时出现高亮度与暗部的情况,现行数码相机无法拍摄出如此高对比度的画面,要么就是暗部细节丢失,要么就是画面不够明亮,这种情况在阳光强烈的拍摄环境中经常都会遇到,3D游戏工业可以通过32bit高精度运算来渲染HDR画面,而数码相机则可以通过多张不同曝光量照片的合成来实现类似的效果,不过这需要涉及到图像格式的调整。
针对TFDs图像识别问题,提出了一种基于独立分量分析(Independent component Analysis,ICA)算法和最大熵模型的解决方案,该方案首先对图像进行预处理,然后利用独立分量分析(ICA)进行特征提取,最后采用最大熵模型进行闸瓦钎故障的分类识别。
凹凸字符在成像时,由于字符和背景的材料和颜色一致,得到的图像对比度较低,在提取字符特征时较一般字符相比难度较大。针对此问题,根据标牌凹凸字符的特点,首次提出了一种基于灰度图像和Gabor变换的凹凸字符特征提取新方法。首先设计了一组Gabor滤波器,然后对凹凸字符的灰度图像直接进行特征抽取,分别提取凹凸字符水平、竖直、左、右对角线等四个方向上的局部笔画特征,在此基础上,继而建立一种不变Gabor特征
尿液图像中的红细胞比较复杂,灰度变化较大。由于采集、光照等原因,红细胞所在的区域包含非常丰富的细节(边缘特征很明显),因此利用Sobel算法,对红细胞进行边缘检测是很必要的,它是细胞图像预处理中一个重要的方法。
顶端分生组织(shoot apical meristems,SAM)为产生新的器官和组织而不断提供新的细胞,它的活性依赖于平衡分生组织细胞的增殖和器官发生之间关系的调控基因。来自不具备光合能力的顶端分生组织的细胞可形成具有光合能力的营养器官。在从营养生长到生殖发育的转变过程中,茎顶端分生组织,转变为花序分生组织,最终形成花分生组织。在进入开花决定状态以前,SAM的状态很大程度上受到环境信号和转录调
The seed cotyledons of a euhalophyte, Suaeda physophora, were found to be dark green. The pigment extracted from the cotyledons was proved to be chlorophyll for the absorption spectra curve of extract
The root system of plant is a vitally important organ for living plant. One of the major functions of the root system is uptaking water and nutrients from the soil. The present paper analyzes the whol
H+ concentration induced-monomerization or trimerization of photosystem I (PSI) in cyanobacteria has never been directly observed. In this work, taking characteristic spectra for the trimers and monom
A T-DNA insertion mutant AtctpA1 was identified to study the physiological roles of a carboxyl-terminal processing protease (CtpA) homologue in Arabidopsis. Under normal growth conditions, disruption
Plants are exposed to many potentially pathogenic microbes in the environment, but each species is only susceptible to a limited number of pathogens. The broad resistance is referred to as nonhost re-