一类特殊的指数分布族参数的经验Bayes检验:NA样本

在线性损失函数下,对NA样本下一类指数分布族参数θ的经验Bayes单侧检验问题进行了研究.通过构造参数的经验Bayes单侧检验函数,获得了它的渐近最优(a.o)性,在适当条件下得出了所提出的经验Bayes检验函数的收敛速度可以任意接近O(n-1/2).     

Kumaraswamy分布族参数的经验Bayes检验收敛速度

在"线性损失"下,研究了Kumaraswamy分布族参数的经验Bayes(EB)检验问题.利用独立同分布样本下密度函数的递归核估计和经验Bayes检验函数的单调性,重新构造了参数的EB检验函数,并在适当的条件下,获得了EB检验函数的收敛速度的阶为O(n~(-λ(s-2.5)/s-1))(s≥3,s∈N~*).     

同分布负相协情形下威布尔分布族参数的经验贝叶斯检验问题

在同分布负相协样本情形下研究了威布尔分布族参数的经验贝叶斯检验.利用密度函数核估计方法构造了参数的经验贝叶斯检验函数,在加权线性损失下获得了该估计的收敛速度,在适当条件下证明了经验贝叶斯检验函数的渐近最优性.     

线性指数模型参数的经验贝叶斯估计

根据经验贝叶斯原理,讨论了在平方损失函数下,线性指数模型参数的非参数经验贝叶斯(empirical贝叶斯,EB)估计问题.首先利用密度函数的核估计方法构造边际分布密度函数以及该分布密度函数的一阶导数;然后结合线性指数模型未知参数在相同损失函数之下的贝叶斯估计得到了未知参数的非参数经验贝叶斯估计.最后由C-R不等式以及Jensen不等式证明了所得到的经验贝叶斯估计的渐进最优性质,并获得了其收敛速度(n-(2r-1)/(2r 1)).     

NA样本下Modified Weibull模型参数的经验Bayes检验

在线性损失函数下,讨论了NA样本情形下Modified Weibull分布刻度参数的经验Bayes单侧检验问题。利用概率密度函数的核估计构造了参数的经验Bayes单侧检验函数,并获得了它的渐近最优性。在适当的条件下证明了所提出的经验Bayes检验函数的收敛速度可任意接近Ο(n-1/2)。     

PA样本下刻度指数族参数的EB检验

目的 研究PA样本情形下刻度指数族参数的经验Bayes检验问题.方法 对密度函数及其导函数采用核估计的方法构造EB检验函数.结果 在加权线性损失下,给出PA样本情形参数EB检验函数渐近最优性及其收敛速度.结论 在适当条件下,所构造的EB检验函数的收敛速度可与iid样本及NA样本一样,任意地接近D(n-1/2).     

NA样本下艾拉姆咖分布参数的经验Bayes检验

【目的】研究NA样本下艾拉姆咖分布参数的经验Bayes检验问题。【方法】在同分布负相协(NA)随机列{X1,X2,…,Xn}下,利用概率密度函数的变窗核估计方法,讨论了艾拉姆咖分布参数θ 的经验Bayes检验问题。【结果】首先得到了经验Bayes检验函数δn(x),然后证明了δn(x)的渐近最优性。【结论】在适当的条件下,利用相关引理和不等式,可获得参数θ 的经验Bayes检验函数δn(x)的收敛速度为Ο(n-1/2) 。
     

大维样本协方差矩阵谱分布收敛速度的一个注记

提高了在有限八阶矩条件下,p×n维大维样本协方差矩阵谱分布收敛到Marcenko-Pastur分布的速度.特别,如果样本维数比率y=yn=p/n接近1,p×n维大维样本协方差矩阵谱分布的期望收敛到极限分布的速度,改进为O(n-1/6).相似在y接近1的条件下,依概率收敛和几乎处处收敛速度为Op(n-1/6)和Oa.s.(n-1/6).     

两两NQD序列下Kumaraswamy分布的经验Bayes检验问题

研究了同分布两两NQD样本下Kumaraswamy分布的经验Bayes(EB)单侧检验问题.利用核估计构造了参数相应的经验Bayes(EB)单侧检验函数,在适当的条件下证明了所提出的EB检验函数是渐近最优的,并获得了EB检验函数的收敛速度.     

NA样本下双指数分布位置参数的经验Bayes估计

在平方损失NA样本下获得了双指数分布参数θ的经验Bayes估计,构造了经验Bayes(EB)估计量,证明了渐近最优且收敛速度阶为O(n-(rs-2)/2(s+2)).     

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.