基于图像天空区域分割的去雾算法

为了提升图像去雾效果，提出了基于天空区域分割的透射率合成图像去雾算法，通过雾霾图像构造的概率分布函数，结合迭代阈值分割及天空区域的暗、亮通道以及最大连通性确定出粗分割阈值。利用引导滤波加强天空与非天空区域像素灰度的差异性，实现了精准分割。利用对数自适应变换估计了天空区域透射率，利用改进的暗通道先验算法估计了非天空区域透射率，通过合成对应像素的透射率实现了图像的去雾。实验结果表明，相比其他去雾算法，所提算法在各客观指标上均有所提高，对天空与非天空区域分割准确，去雾图像整体视觉效果良好。     

双定时混合截尾下Pareto产品失效时刻的预测

假设受试样品的失效时刻服从Pareto分布，基于双定时混合截尾样本得到了未来失效时刻的概率密度函数，利用经典方法得到了未来失效时刻的点预测和区间预测.当形状参数的先验分布分别取为伽玛先验和无信息先验分布时，得到了未来次序失效时刻的等尾预测区间.根据所得到的双定时混合截尾数据，对于独立同分布于该Pareto分布的任一产品，得到了它的失效时刻的中位数预测和区间预测.借助一个数值例子，利用文中的结论计算出了相关的点预测和区间预测.     

基于正交局部慢性特征的故障检测方法

为提高化工行业中数据驱动故障检测的效果,该文针对实际工业系统中闭环控制导致的过程动态特性和数据流形中蕴含的局部信息,提出了一种基于局部时空正则慢特征提取(local time-space regularized slow feature extraction, LTSS)的方法进行故障检测。首先,构造基于局部时空正则的目标函数得到投影矩阵,进而得到预提取特征S,则S张成的空间中包含了静态信息,而S的一阶差分张成的空间中包含了动态信息。其次,基于独立成分分析(independent components analysis, ICA)方法,分别为2个空间构建对应的S~2和SPE统计量进行监控,用于实时故障检测。在TE (Tennessee Eastman)过程上的案例研究可以证明所提方法的有效性。     

原始方程组对黏性系数的连续依赖性

考虑了柱形区域上带振荡随机力的大尺度海洋三维原始方程组的连续依赖性。运用微分不等式技术,推导了方程组解的先验界,采取能量分析的办法,得到了方程组的解对黏性系数的连续依赖性。     

一类具有空间扩散项的生态-流行病模型

针对一类具有空间扩散项的生态-流行病模型.利用最大值原理和Harnack不等式估计了反应扩散方程组解的上下界,进一步利用Poincare不等式和Young不等式,证明了非正常数解的不存在性.得到了生态-流行病模型各个平衡点局部渐近稳定性的充分条件和非正常数解不存在性的充分条件,对研究具有空间扩散项的生态-流行病模型具有重要的意义.     

一种基于样本块的图像超分辨率方法研究

提出了一种在马尔科夫网络框架下基于样本块的图像超分辨率算法。算法根据相似性选取多个样本块作为图像重建的候选,在候选集中计算图像块先验概率和图像块之间的相容性,最后在马尔科夫框架下选取最优图像块,合成最终的高分辨率图像。实验证明本文提出的算法具有较好的超分辨率效果。     

定数截尾数据缺失场合下Weibull分布的Bayes统计分析

当寿命分布为Weibull分布时,本文给出了定数截尾数据缺失场合下各种参数的Bayes估计,并且给出了它们与极大似然估计的模拟比较.     

论爱默生其人其诗

Ralph Waldo Emerson, born in 19th century's America, is most famous for his transcendental ideas and writings. He was deeply influenced by European Romanticism in his thirties and formed an informal Transcendental Club with people of like minds. His thought is often considered the core of Transcendentalism. "Nature" is the fundamental document of his philosophy and an embodiment of his transcendental attitude towards the phenomenal world. He also wrote some other brilliant essays such as "The American Scholar", "Self-Reliance", "The Over-Soul" and "The Poet", etc, all of which established his indisputable position in the history of culture, especially in the American Culture where he is regarded as the one who, in literally terms at least, really put America on map. But considering Emerson's writings without significant emphasis on his verse would be a great loss. Emerson wrote poetry from the time he was a boy to nearly the end of his life. These poems are essential for understanding him and his transcendental theories and are receiving more extensive representation in anthologies while significant critical analyses are emerging though some modern readers and scholars tend to view his poetry as secondary to the "essential" Emerson. In view of the above, this paper supposes to introduce Emerson's views on poets and poems and then analyze some of his famous poems in the order of 'Emerson as a Poet', 'Emerson's Views on Poets and Poems' and 'Emerson's Poems' with the third one as the focus of this paper. The purpose of this paper is to try to make the comprehension on Emerson and his abstract transcendental theories more complete and thorough by emphasizing his contribution in the poetic field.     

正态模型下单边假设检验问题中频率与贝叶斯证据的一致性

假设检验问题中的频率与贝叶斯证据的一致性或和谐性是频率学派和贝叶斯学派所共同关心的问题.研究正态模型下单边假设检验问题中广义p-值以及Jeffreys无信息先验下的贝叶斯证据,证明了各种检验问题中两类证据的一致性.