时间序列系统的随机集建模与预测

介绍了随机集理论的基本数学概念.利用覆盖函数估计定义了一个模糊集,在此基础上将统计目标整合到基于规则的系统中.通过建模仿真,对有独立观测值的统计方法进行了很好的估计、预测和控制,提出了一种新的解决时间序列系统辨识的方法.实例结果表明,随机集是系统辨识的一个新的好方法.     

基于最速下降的混沌时间序列参数估计和滤波

提出了从被加性高斯白噪声污染的混沌时间序列中同时估计混沌系统参数和滤除序列噪声的新方法．并假定产生非线性时间序列的模型已知,但相应的参数未知．这种新方法把对混沌时间序列的参数估计和滤波看作是一种最小化过程,并利用了最速梯度下降方法解决．数值模拟实验表明,新方法要优于现有的方法,是估计混沌系统参数和滤波的一种有效方法．     

基于随机模糊集的粗糙集模型

为处理人工智能、不精确性和不确定性等问题,综合随机集和模糊集两类集合的优点,提出一种新的粗糙集模型一基于随机模糊集的粗糙集模型．利用随机模糊集定义了一种近似算子,并给出了这种近似算子的一些重要性质．     

F集值统计

汪培庄在文[1]中首次提出集值统计的概念,其理论基础是随机集落影理论,本文在文[1]的基础上,把随机集及其落影的概念加以扩充,给出F随机集及其落影的概念,进而提出F集值统计方法,同时,本文还讨论了K·Hirota提出的概率集与F随机集的关系.     

关于时间序列预测法的探讨

时间序列预测法是一种根据动态数据揭示系统动态结构和规律的统计方法.本文给出了时间序列模型的模式识别和实现方法,建立了能够比较精确地反映时间序列中所包含的动态依存关系的数学模型,具有一定的自适应性,能更好地预测实际问题.     

针对能量差值嵌入的视频隐藏分析算法

能量差值信息隐藏（differential energy watermarking,DEW）算法通过有选择地舍弃视频图像中某些区域的部分高频DCT系数,形成能量差异而达到信息嵌入的目的．为此,利用视频序列时间域的强相关性建立针对性统计估计模型,侦测DEW算法所造成的载体信息统计特性变化,并结合K-S统计假设检验方法设计一种视频信息隐藏分析算法．结果表明,此算法能够有效地检测压缩视频码流中是否有DEW算法嵌入的特定信息．     

关于r－收敛的一些结果

证明了集合序列的ｒ－收敛蕴含Ｋ－Ｍ收敛，给出了随机集列在γ－收敛意义下的收敛定理．     

图书流通量统计时间序列的非线性特性

图书馆流通管理人力资源的配置以流通量的统计分析为基础,研究流通量统计时间序列的性质是对其进行描述与分析的前提．通过对流通量统计时间序列的散点图的分析,发现其具有明显的纺锤形状,而其Kolmogorov复杂度G的计算数值在0．6左右,也在0和1之间,均表明流通量统计时间序列具有典型的非线性特征,可以采用非线性方法来处理与研究流通量统计时间序列．     

多通道火灾探测信号的分析与合成方法

提出一种多通道火灾探测信号的分析与合成方法，通过建立基于信号互功率谱的多通道信号模型，提取火灾和非火灾两种情形下的烟雾、温度等实际信号的统计特征，自适应合成信号序列，探讨了模型参数的选择，并开发了探测算法模拟测试系统．实验表明，该方法能有效地测试出探测算法的火灾报警时间和误报警率等性能指标．     

中国股市日内成交量序列建模及预测研究

首先研究上证指数日内高频成交量时间序列的统计特征,包括平稳性、自相关和 长 记 忆 性,然后我们通过对剔除日内周期趋势的成交量序列建立 ＡＲＭＡ 模型,并分别结合 ＡＲＣＨ 类模型和 ＡＲＦＩＭＡ 模型消除模型的异方差和长记忆性．我们的实证分析结果表明在消除日内周期项、异方差和长记忆性后建立的时间序列模型比原始序列的时间序列模型有更高的预测精度．      

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.