地基云图识别的光照补偿算法

为研究地基云图云状识别中的光照补偿问题,针对可见光地基云图,提出了一种基于BEMD与Closed-Form景物提取算法相结合的地基云图光照补偿算法对云图进行预处理,经过去光照处理后的云图,再进行Hilbert谱特征提取,最后进行云类的识别。与基于L1的全变分模型的光照补偿算法相比,可有效地去除云图的光照影响,又不至于去掉云图自身的信息,且与背景区别明显。试验结果表明,使用该方法与未进行处理的云图相比识别率提高4.17%~18.88%。     

充分发展湍流标度律的数学模型

为了解湍流小尺度结构的特征,以及湍流雷诺应力模型的建立,开展了充分发展湍流的标度律研究。提出了建立数学模型来研究湍流标度律的方法,可以方便地提取湍流的标度指数。结果表明:该理论不再需要"惯性区的存在"或"大雷诺数"的假设,不再依赖于标度区间的确定,标度指数完全可以通过计算确定下来,新模型确定的标度指数与ESS的标度指数几乎完全一致,误差在1%以内,且物理意义更明确。     

基于SVM和雷达回波反射率的雹云模型识别研究

为了提高基于支持向量机(Support Vector Machine,SVM)的大雨、冰雹模型的分类准确率,利用SVM分类方法与雷达回波反射率图像相结合的方法建立模型。提取雹云图像与大雨图像的的特征数据进行筛选,分别求出它们的和、中位数与方差,组成的三维识别向量作为SVM模型判别的变量数据训练模型。利用该模型对已有样本进行测试,可得雹云判别模型的识别率较高,且判别误差率较低。结果表明,通过气象雷达反射率图像的回波强度数据与SVM分类模型相结合构造的雹云判别模型,具有较好的效果。     

夜间静止卫星红外云图的GHSOM网络云分类模型

针对夜间云分类准确率低下的问题,利用奇异值分解方法对FY-2E夜间红外云图进行特征提取和选择,从中筛选出包括亮温和分裂窗差值在内的不同的纹理特征。分别采用动态增长型分层自组织和自组织映射2种神经网络模型对夜间云图进行分类,并将2种网络模型的分类效果进行对比分析。实验结果表明:GHSOM网络模型在夜间云图分类方面效果较好,平均准确率总体上高于SOM,通过分层的分类方法极大地提高了夜间云图的分类准确率。     

基于改进LeNet-5模型的手写体中文识别

手写体中文的自动识别是中文文档数字化的前提和基础,由于中文字符数目繁多、相似性强、字体种类繁多、书写随意、缺乏统一规范等原因,一直是计算机视觉领域中一个具有挑战性的问题.为解决这一难题,提出了一种基于卷积神经网络的手写体中文识别方法.在经典LeNet-5网络模型的基础上进行改进,提出了一种LeNet-Ⅱ模型.利用改进的Inception模块和空洞卷积,设计了一种并行的双路卷积神经网络结构;两路分支可分别提取手写中文图像中不同尺度的特征,获得多个尺度的特征图像;通过对其进行特征融合,可以达到丰富特征图像多样性、提升识别准确率的目的;最后经过全连接层进行分类.利用经典手写体中文数据集进行训练,利用该模型实现了3 755类手写体中文字符及相关文本的自动识别.实验结果表明,基于改进LeNet-5模型的手写体中文识别方法,在同一训练数据集上的收敛速度和识别准确率明显优于经典LeNet-5模型,对经典数据集的识别准确率可以达到95.21%,也高于其他传统算法;此外,对4幅手写体中文文本的平均识别准确率达到97.30%,超出了人类表现,取得了理想的实际效果.     

复杂系统的标度律与层次结构分析

为了对复杂非线性系统的特性进行分析,将用于分析湍流信号的标度律和层次结构理论,推广到对人脑电图、图像灰度分布和英文小说随机字母的分布等复杂信号进行统计分析.结果发现:这些复杂信号与湍流信号一样,也具有很好的扩展自相似ESS(extended self similarity)标度律和较明显的层次结构或相似律(Hierarchical Structure,简称HS层次结构理论).说明ESS标度律与SL层次结构理论具有定量刻画一般复杂信号统计规律的能力,它对揭示存在于一般复杂系统结构中的多尺度、多涨落和多强度(或激发状态)的统计自相似特性具有一定的普遍指导意义.     

基于随机森林-遗传算法-极限学习机的非侵入式负荷识别方法

提高负荷识别准确率是实现非侵入式负荷监测的关键技术。针对现有模型识别准确率低,特征冗余度高、可分性较差的问题,提出一种基于随机森林(RF)和遗传算法优化极限学习机(GA-ELM)的负荷识别方法。首先从稳态电流信号中提取时域和频域信息作为负荷特征。为进一步减小特征集的冗余度并剔除可分性较差的特征,使用随机森林算法对特征进行优选,得到最优特征集。最后使用遗传算法优化极限学习机的权值和偏置参数,建立负荷识别模型。利用所建立的模型对11个家用电器共16种负荷状态进行识别,实验结果表明,所提模型可以提高识别准确率,使用该模型可以对家用负荷进行快速有效识别。     

湍流多尺度相干结构间歇性的PIV实验研究

利用粒子成像测速(PIV)系统测量了湍流边界层中流向速度平面,并对湍流多尺度相干结构统计特性进行了实验研究.利用连续子波变换,计算了不同尺度、不同法向位置的子波系数概率密度函数.结果发现缓冲区有着更强的间歇性.利用子波系数量化湍流间歇性的方法,应用推广的自相似律(ESS),计算了子波系数结构函数的标度指数.研究表明:当多尺度相干结构被提取出后,利用子波系数计算的ESS标度律就符合科尔莫戈罗夫提出的线性标度律,验证了多尺度相干结构是湍流边界层产生奇异标度律的原因.此外,利用PIV系统测量的数据,给出了流向平面内的以子波系数表达的能量分布.这种方法有利于进一步对多尺度相干结构在空间平面内的辨识与特性进行研究.     

基于InSAR的潜在滑坡人工智能识别——以延安宝塔区为例

基于合成孔径雷达干涉测量(InSAR)技术,结合热点分析和机器学习算法,进行区域高形变斜坡自动提取和潜在滑坡人工智能识别研究,以提升潜在滑坡识别效率和准确性,解决传统人工调查和目视解译无法有效识别位于高位、隐蔽性较强的潜在滑坡问题.结果表明,基于热点分析自动提取20处高形变区域,提取正确率、错分率和漏分率分别为74.31%、25.69%和11.80%,证实热点分析方法能够有效应用于InSAR高形变区自动识别和提取.基于识别的高形变区,结合历史滑坡灾害发育特征,利用机器学习算法建立潜在滑坡预测模型,采用表现最佳的自适应提升模型对自动提取区域进行预测,预测召回率和准确率分别为81%和65%,能够实现潜在滑坡的有效识别.     

基于堆栈稀疏自编码与整体嵌套的乳腺病理图像细胞识别

为解决病理图像的快速分析和利用细胞自动识别的问题,提出了一种基于堆栈稀疏自编码与整体嵌套的细胞识别的方法,快速、高效、准确地识别了高分辨率病理组织图像中的细胞.运用堆栈自编码对训练集中的细胞样本块和非细胞样本块提取高级特征,并运用特征训练Softmax分类器,加入融合层进行融合,用于细胞的自动识别;在训练过程中,还引入了一种新的整体嵌套结构.结果表明:该算法能有效识别出细胞,较其他自编码相比,具有更高的准确率、召回率和综合评价指标.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.