一种基于Red-Black小波的图像融合的改进算法

为增加融合后图像信息量,增强图像清晰度,提出一种基于Red-Black小波图像融合的改进算法。该算法在对源图像进行Red-Black小波变换前,首先进行PCA变换,然后对得到的第一分量作多尺度的Red-Black小波分解,对于高频子带系数和低频子带系数分别采用基于极大值的选择和基于区域方差的融合规则。最后对融合后的各级子图像进行Red-Black重构,并对重构的结果进行PCA逆变换得到融合的图像。实验结果表明,提出的算法进行多光谱图像融合可以很好地保留光谱信息并且有较高的空间分辨率,提高了熵值,增加了融合后图像的信息量,扩大了信息丰富程度,也有效增强了图像的清晰度,具有较好的视觉效果,在遥感图像处理领域有较广泛的应用前景。

基于Red-Black小波变换的多光谱图像融合方法

针对张量积小波在多光谱图像融合中的不足,提出了一种基于Red-B lack小波变换的多光谱图像和高空间分辨率全色图像融合方法。首先对多光谱图像进行IHS变换,将得到的亮度分量和高空间分辨率全色图像进行直方图匹配,并分别作多尺度Red-B lack小波分解,然后对低频部分采用加权平均、高频部分采用替代的融合算法对分解子图像进行融合,最后对融合后的各级子图像进行Red-B lack重构和IHS逆变换得到融合结果图像,采用客观性能指标对融合结果图像进行了评价。实验结果表明,该方法有较好的融合效果,其保持光谱质量和空间分辨率信息的能力比基于IHS变换融合方法、基于DWT的融合方法和基于IHS-DWT的融合方法都强。

求解非线性Black-Scholes模型的自适应小波精细积分法

针对非线性Black-Scholes方程,基于quasi-Shannon小波函数给出了一种求解非线性偏微分方程的自适应多尺度小波精细积分法.该方法首先利用插值小波理论构造了用于逼近连续函数的多尺度小波插值算子,利用该算子可以将非线性Black-Scholes方程自适应离散为非线性常微分方程组;然后将用于求解常微分方程组的精细积分法和小波变换的动态过程相结合,并利用非线性处理技术(如同伦分析技术)可有效求解非线性Black-Scholes方程.数值结果表明了该方法在数值精度和计算效率方面的优越性.

Analysis of the Red and the Black via Aristotle's Catharsis Theory

The Red and the Black,authored by French writer Stendhal,depicts the rugged short life of Julian and vividly presents to readers a picture of social life under the reign of Charles X. Being a masterpiece of critical realism,its description of figures and arrangement of plot are intimately bound up with ancient Greek spirit of tragedy. The present paper aims to analysis the unity of plot as well as characters of figures in The Red and the Black via Aristotle's tragedy theory of catharsis,and to expound the tragic effect of this novel.

Burial Records of Reactive Iron in Cretaceous Black Shales and Oceanic Red Beds from Southern Tibet

One of the new directions in the field of Cretaceous research is to elucidate the mechanism of the sedimentary transition from the Cretaceous black shales to oceanic red beds. A chemical sequential extraction method was applied to these two types of rocks from southern Tibet to investigate the burial records of reactive iron. Results indicate that carbonate-associated iron and pyrite are relatively enriched in the black shales, but depleted or absent in red beds. The main feature of the reactive iron in the red beds is relative enrichment of iron oxides （largely hematite）, which occurred during syn-depostion or early diagenesis. The ratio between iron oxides and the total iron indicates an oxygen-enriched environment for red bed deposition. A comparison between the reactive iron burial records and proxies of paleo-productivity suggests that paleo-productivity decreases when the ratio between iron oxides and the total iron increases in the red beds. This phenomenon could imply that the relationship between marine redox and productivity might be one of the reasons for the sedimentary transition from Cretaceous black shale to oceanic red bed deposition.

Response of Reactive Phosphorus Burial to the Sedimentary Transition from Cretaceous Black Shales to Oceanic Red Beds in Southern Tibet

The mechanism of sedimentary transition from the Cretaceous black shales to the oceanic red beds is a new and important direction of Cretaceous research. Chemical sequential extraction is applied to study the burial records of reactive phosphorus in the black shale of the Gyabula Formation and oceanic red beds of the Chuangde Formation, Southern Tibet. Results indicate that the principal reactive phosphorus species is the authigenic and carbonate-associated phosphorus （CAP） in the Gyabula Formation and iron oxides-associated phosphorus （FeP） in the Chuangde Formation which accounts for more than half of their own total phosphorus content. While the authigenic and carbonate-associated phosphorus （CAP） is almost equal in the two Formations; the iron oxidesassociated phosphorus is about 1.6 times higher in the Chuangde Formation than that in the Gyabula Formation resulting in a higher content of the total phosphorus in the Chuangde Formation. According to the observations on the marine phosphorus cyde in Modern Ocean, it is found that preferential burial and regeneration of reactive phosphorus corresponds to highly oxic and reducing conditions, respectively, leading to the different distribution of phosphorus in these two distinct type of marine sediments. It is the redox-sensitive behavior of phosphorus cycle to the different redox conditions in the ocean and the controlling effects of phosphorus to the marine production that stimulate the local sedimentary transition from the Cretaceous black shale to the oceanic red beds.

Variation on Foraminiferal Composition in Cretaceous Black-Gray-Red Bed Sequence of Southern Tibet, China

An Upper Cretaceous black-gray-red bed sequence was deposited in the Tethys-Himalayan Sea where abundant foraminifera,especially planktons,were yielded. In the shallow shelf to the upper slope on the north margin of Indian plate was recorded an extinction-recovery-radiation cycle of foraminiferal fauna highly sensitive to paleoceanographical changes. The black unit, consisting of the Late Cenomanian-earliest Turonian beds, displays a major extinction, with keeled planktonic and many benthic species as the principal victims at the end of the Cenomanian when existed only low diversity, surface water-dwelling foraminifera. The gray unit spans a long-term recovery interval from the Turonian to the early Santonian with keeled planktonic foraminifera returning stepwise to the water column. The planktonic biota in the red unit, extremely abundant, indicate a biotic radiation during the Late Santonian and the Early Campanian, implying that the high oxygen levels had returned to all the oceanic depth levels, and that the water stratification disappeared, followed by the radiation of all depth-dwellers. The variation on foraminiferal faunas from the whole sequence refers to the extreme warm climate that appeared in the Middle Cretaceous and to the declined temperature toward the late epoch. Substantial deposits for this warming and cooling zones represent the black shales in the Middle Cretaceous and the red beds in the later period of the southern Tibet. The change in the foraminiferal composition corresponded to the formation of dysaerobic facies and to the development of high-oxidized circumstances.

Lipids and Fatty Acid Composition of Dried Edible Red and Black Ants

Total lipid contents,lipid classes and fatty acid compositions of hot-air dried edible black ants（Polyrhachis vicina Roger） from Wenzhou and Guizhou,China,and edible red ant（Oecophylla smaragdina Fabricius） from Thailand were determined.The major lipid components were triacylglycerol（43.4-79.4% of total lipid）,followed by phospholipids（6.1-21.5%）,diacylglycerol（6.1-18.1%） and cholesterol ester（4.9-13.5%） while free fatty acids（1.8-2.9%） and sterol（0.5-0.8%） were the minor components.Oleic acid（C18：1） was the most predominant fatty acid,accounting for 3 407.8,9 098.8 and 3 790.1 mg 100 g-1 in Wenzhou and Guizhou black ants,and Thai red ant,respectively.Followed by palmitic acid（C16：0）,922.9,2 523.3 and 1 511.8 mg 100 g-1;linoleic acid（C18：2n-6）,133.7,305.2 and 506.4 mg 100 g-1;α-linolenic acid（C18：3n-3）,35.1,138.0 and 52.5 mg 100 g-1;eicosapentaenoic acid（C20：5n-3） was 19.1,15.0 and 20.0 mg 100 g-1 in Wenzhou and Guizhou black ants,and Thai red ant,respectively.Docosapentaenoic acid（C22：5n-3） was only found in black ants,7.0 and 7.3 mg 100 g-1 for Wenzhou and Guizhou ants,respectively.The edible black and red ants were shown to be a good source of unsaturated fatty acid.

On Syntagmatic and Paradigmatic Relations： a Case Study of ＂Red＂ and ＂Black＂

Through analyzing the paradigmatic and syntagmatic relations and exploring the case study of"red"and"black"in thedifferent culture backgrounds, the problems in the comprehension are put forward for the purpose of enhancing the learners' abilityof words comprehension based on a complex meaning system.

1/3 and 2/3,Running in Red or in Black?

Figures are always confusing or even hardly comprehensible in any statistical analysis report,textile industry in China is so huge that a close approach to understanding its economic performance as a whole would be a lucky experience. The two figures of 1/3 and 2/3 are a lot seen in various media coverage.Where does this figure come from and what does it mean?

基于红黑小波的图像显著性检测

频域分析方法是图像显著性检测的经典方法之一,算法简单且计算速度快.然而传统的傅里叶频域分析方法计算出的显著性图精细度较低,难以获得满意的显著性区域分割结果.针对此问题,文中提出基于红黑小波变换的图像显著性检测方法.首先根据图像的尺寸确定红黑小波的分解层数;然后将原始图像和经过高斯平滑处理的图像分别进行红黑小波分解,求得二者分解结果的差值,并对该值进行红黑小波反变换获得显著性图.实验结果表明,与传统的傅里叶频域分析方法相比,该方法可获得更好的显著性检测效果.

黑豆皮红色素微波辅助提取与乙醇浸提的工艺比较研究

目的确定黑豆皮红色素的最佳提取条件。方法通过单因素和正交试验确定优化工艺条件。结果采用微波提取功率为中火(385W)、体积比(1:1)的75%乙醇和0.1mol/L盐酸为提取剂、提取时间120s、提取次数2次,料液比1:40时,色素提取率可达98.1%。结论微波用于提取天然植物色素优于传统工艺。

基于提升框架的非张量积小波图像融合方法

利用Geert Uytterhoeven提出的一种非张量积小波(Red-Black小波)来进行图像融合。首先基于提升框架的思想构造Red-Black小波,然后将其应用于两组图像融合实验:不同聚焦点图像融合与可见光—红外图像融合;并分别采用基于统计特性和信息量的评价指标,将本文方法与db4张量积小波的图像融合方法进行了比较。实验结果表明,本文的方法优于db4张量积小波的图像融合方法。

基于红-黑小波变换的图像去噪算法

在红-黑小波变换的基础上,提出了一种新的阈值方法对小波系数进行萎缩以实现图像的去噪.该阈值方法结合了仿射阈值和非负Garrote阈值的优点,能在保留图像细节的基础上实现更好的去噪效果.通过仿真试验,对不同尺度下的阈值提出了一组最多适用到8级红-黑小波变换的阈值权重.结果证明,结合所提出的阈值方法和这一组阈值权重能实现较为理想的去噪效果.

应用混合小波神经网络和遗传算法在香港衍生品市场上的研究

提出了新的基于Black-Scholes模型的混合小波神经网络。隐含波动率是指在市场中观察的期权价格所蕴涵的波动率。基于不同种类的期权价格对波动率的敏感度不同,建立了混合小波神经网络和遗传算法相结合的模型,将期权按钱性进行分类,提出了加权的隐含波动率作为神经网络的输入变量,通过遗传算法来求取不同种类期权的隐含波动率的最优权重。在香港衍生品市场的实证中表明,所提出的模型优于传统的Black-Scholes模型。

基于HSV和红黑小波变换的多光谱图像融合

提出一种基于HSV和红黑小波变换的多光谱图像融合方法。对多光谱图像进行HSV变换,将得到的明度分量和全色图像做多尺度红黑不可分小波分解。采用不同的融合算子对高低频分量进行融合,对融合后的图像进行红黑重构和HSV逆变换得到融合结果,并采用客观性能指标对融合结果进行评价。实验结果表明,该方法对多光谱图像和高空间分辨率图像有较好的融合效果。

基于红-黑小波变换的图像数据压缩方法

提出了一种新的变换方法――红–黑小波变换用于图像的压缩,红–黑小波变换与张量积小波变换相比,它的去相关性更好,能得到更稀疏的图像表示。从理论分析和实验结果表明,将红–黑小波变换用于图像压缩是一种更为有效的方法。

基于整数红-黑小波变换的图像加密算法

设计了一种基于整数红-黑小波变换的图像加密算法。首先对图像进行最大层数整数红-黑小波变换,然后仅加密非零高频系数,加密方法是利用交叉混沌映射生成的混沌序列对系数进行扩散。最后,对加密后的系数矩阵进行类似zigzag扫描,得到加密数据并传输到接收方。该方案弥补了传统频域加密算法不能无损重构的缺陷,克服了单一、低维混沌系统保密性不高的缺点,密钥空间大、敏感性强,并且能有效抵抗信息丢失,具有很好的安全性和实用性。

红-黑小波变换

介绍一种新的第二代小波变换--红-黑小波变换,它是把矩形栅格的数字图像分成红块和黑块,利用二维提升格式进行构造。并从理论上与张量积小波变换进行了比较。实验表明红-黑小波变换可以更有效地去除图像的相关性并得到更稀疏的图像表示,在图像压缩中红-黑小波变换比传统小波变换更有效。

频域约束的红-黑小波变换图像复原算法

提出一种频域约束的红-黑小波变换图像复原新算法.该算法引入频域约束因子,对不同频率的部分系数给予不同程度的约束,保证了对有色噪声的压制效果,保留了图像细节信息.利用频域约束的红-黑小波变换提取图像信息,消除了有色噪声和振铃效应,实现了降质图像复原.运用含噪退化的图像进行了实验.结果表明,该方法与维纳滤波、等功率谱方法相比,信噪比RSN及信噪比提高RS′N两个参数均提高了3倍.