主子阵约束下的Hermite广义反Hamilton 矩阵的广义特征值反问题

利用矩阵分块和矩阵商奇异值分解,给出了主子阵约束下的Hermite广义反Hamilton矩阵的广义特征值反问题有解的充要条件和通解具体表达式.并讨论了用主子阵约束下的广义特征值反问题的Hermite广义反Hamilton解来构造给定矩阵的最佳逼近解问题,得出该问题有解的充分必要条件和最佳逼近解的表达式.     

广义Lehmer矩阵求逆问题研究

利用矩阵的LU和Cholesky分解推导出Lehmer矩阵行列式和逆的解析表达式.在此基础上,定义了广义Lehmer矩阵,并获得了其LU分解和Cholesky分解公式,进而简化了广义Lehmer矩阵行列式和求逆的计算问题.     

关于正定矩阵平方根分解性质的讨论及正定矩阵某个特征的证明

基于高斯消去法和A的LU分解之间的密切关系,讨论用高斯消去法的约化过程对正定矩阵A实现唯一的cholesky分解,具体给出一个构造性的直接计算分解的证明过程,以及将分解运用到求证正定矩阵某个特征的证明方法.     

基于四元数矩阵分解的线性方程组解的存在性判断研究

随着刚体运动分析的日益成熟,四元数理论获得了在诸多领域更为广泛的应用.该文从四元数理论的起源谈起,介绍了四元数矩阵的基本表达和主要性质.依托一般矩阵的分解思路,给出了四元数矩阵的奇异值分解和LU分解过程.因为四元数矩阵不满足乘法交换律,在进行LU分解时借助了高斯消去法.最后,在四元数矩阵分解方法的基础上,对线性方程组解的存在性问题进行了研究,并给出了解存在时的解形式.     

对角占优矩阵研究

研究了对角占优矩阵的性质,给出了此类矩阵奇异的一个充分条件和一个充分必要条件,同时给出了它的LU分解形式.     

矩阵分解及其求逆矩阵

Ｄｏｏｌｉｔｔｌｅ对矩阵分解为在矩阵的各阶主子矩阵为非奇异的条件下，Ａ可唯一的分解为一个下三角分块矩阵与一个上三角分块矩阵的乘积形式，本文给出若矩阵Ａ的左上主子矩阵有一个ｒ阶主子矩阵为非奇异的，则Ａ可分解为一个下三角分块矩阵与一个上三角分块矩阵的乘积形式，并给出求逆的计算方法。     

矩阵分解及其求逆矩阵

Ｄｏｏｌｉｔｔｌｅ对矩阵分解为在矩阵的各阶主子矩阵为非奇异的条件下，Ａ可唯一的分解为一个下三角分块矩阵与一个上三角分块矩阵和乘积形式。本文给出若矩阵Ａ的左上主子矩阵有一个ｒ阶主子矩阵为非奇异的，则Ａ可分解为一个下三角分块矩阵与一个上三角分块矩阵的乘积形式，并给出求逆的计算方法。     

矩阵的LU并行递归分解算法的设计研究

分析了矩阵的LU分解原理,并在双核微机上设计实现了一种矩阵的LU并行递归分解算法.该算法的特点是引入分块矩阵把LU分解形成迭代递归的形式,进而较好地发挥了新型微机的并行运算和高速缓冲存储器的功能.实验结果表明该算法是可行和有效的.     

合流多项式Vandermonde矩阵的块LU分解

将给出多项式基下合流Vandermonde矩阵的块LU分解,它是基于多项式基下合流Vandermonde矩阵所满足的位移结构方程这一特殊形式,利用这一特殊形式对多项式合流Vandermonde矩阵进行Gauss消元法,从而降低算法的运算量.在降低运算量的基础上,运用位移结构矩阵Schur补的性质来计算此类矩阵的LU分解.     

星形弹簧质量系统的振动反问题

利用矩阵的奇异值分解研究分块箭状矩阵的反问题, 证明了解存在唯一的充分必要条件, 并给出了解的具体表达式.     

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.