部分线性回归模型的一步局部M-估计

讨论了部分线性回归模型的一步局部M-估计。用一步局部M-估计给出未知函数估计。用平均方法给出参数估计,并证明回归函数和其导函数的弱一致性和联合正态性。     

广义线性模型的M-估计

用M-估计来估计广义线性模型中的未知参数β.首先,在一定的假设条件下,根据已有的对广义线性模型中未知参数β的极大似然估计方法,应用大数定律及鞅中心极限定理,证明了广义线性模型的M-估计的两个重要性质,印相合性及渐近正态性.其次,将固定设计的思想引入M-估计,并与广义线性模型相结合,证明了其相合性及渐近正态性.最后通过数...     

ARCH(0,q)模型参数M-估计的渐近性质

在一个新的准则函数下,用遍历性定理证明了自回归条件异方差模型ARCH(0,q)参数的M-估计的相合性,并用鞅中心极限定理给出了该模型M-估计的渐近正态性.     

带有线性测量误差的半参数EV模型的估计

研究一类带有线性测量误差的半参数EV模型的估计问题.通过综合利用核光滑方法、修正最小二乘法和广义最小二乘法给出未知参数和未知函数的估计.在一般条件下,证明了未知参数估计的渐近正态性并给出了未知函数估计的收敛速度.     

变系数回归模型的局部M-估计

讨论了变系数回归模型的系数函数的估计问题.在通常的局部M-回归方法基础上嵌入一个变窗宽对模型的系数函数进行了估计,并在样本独立同分布的情况下,讨论了系数函数估计的弱相合性和渐近正态性,最后,给出了估计的渐近性质的证明.     

二元积分不等式的若干推广

本文主要研究一类具有时滞的二元非线性积分不等式.在不要求已知函数的单调性和可微性的条件下,本文通过将不等式中的函数单调化和积分号外函数常量化的方法给出了这类不等式中未知函数的估计,并以推论形式给出相应一元积分不等式中未知函数的解的估计.最后,本文利用该估计证明了一类积分方程和一类微分方程解的有界性.     

误差相关下半变系数模型的随机约束估计

讨论误差相关下半变系数模型的随机约束估计。先用局部线性方法给出未知系数函数的估计,再由最小二乘法估计出未知参量,并讨论了估计的渐近正态性。     

缺失数据下局部M-估计的相合性和渐近正态性

在缺失响应变量的不完全数据下,对非参数回归模型进行研究,利用稳健的变窗宽局部线性回归的方法,给出了回归函数m(x)的估计,并证明了局部M-估计具有相合性和渐近正态性.所提出的方法继承了局部多项式回归的优点并且克服了最小二乘方法缺乏稳健性的缺点.并且使用变窗宽提高了所得M-估计的可塑性,使之能成功地处理空间非齐次曲线、异方差性及非均匀设计密度.所得估计的渐近结果为求渐近最优方案以及直接从数据估计最优变窗宽提供了理论基础.     

二元积分不等式的若干推广及应用

在本文中,我们主要研究一类具有时滞的二元非线性积分不等式. 在不要求已知函数的单调性和可微性的条件下,通过将不等式中的函数单调化和积分号外函数作常量化的方法, 给出这类不等式中未知函数的估计, 并且以推论形式给出相应的一元积分不等式中未知函数的解的估计. 最后, 利用该估计证明了一类积分方程和一类微分方程的解的有界性.     

比例可加模型的参数估计

讨论了比例可加模型的参数估计.使用局部线性方法和平均方法定义了参数给定情况下未知函数的平均估计,然后使用回切方法和最小二乘法给出了未知参数向量的估计,并研究了参数估计的渐近正态性.     

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.     

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.     

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.