关于ZK-BBM方程的扰动分析

利用多参数形式的行波变换将ZK-BBM方程转化为常微分方程,分析出系统存在关于波速c的连接鞍点的同宿轨线,即ZK-BBM方程的孤立波解曲线;当系统发生阻尼扰动和外激励扰动时,该孤立波解曲线发生重大变化,运用Melnikov方法,给出了混沌的阀值曲线;并且通过数值模拟,给出了系统随扰动参数变化走向混沌的周期倍分岔图。     

一类Boussinesq方程的同宿轨和周期孤立子

研究了一类具有周期边界条件和偶约束的Boussinesq方程.首先,通过线性稳定性分析,证明了“坏”Boussinesq方程存在同宿轨解,而“好”Boussinesq方程存在孤立子解.然后,利用Hirota双线性方法,分别获得了同宿轨和孤立子的显式表达式,而且发现孤立子解存在爆破现象.     

经典Boussinesq方程的新同宿轨和孤立子解

 考虑了经典的Boussinesq方程.通过线性稳定性分析,证明了经典的“好”Boussinesq方程存在同宿轨解,经典的“坏”Boussinesq方程存在孤立子解.然后,利用Hirota双线性方法,得到了方程的新同宿轨和孤立子解.     

一类Boussinesq方程的同宿分岔

研究了一类Boussinesq方程解的结构问题——同宿分岔.首先,通过线性稳定性分析,说明解存在分岔点.其次,利用Hirota方法求出了方程的孤立子解和同宿轨解,然后在此基础上讨论了解的同宿分岔现象,通过研究解的同宿分岔,从而把握解的结构.     

非线性Schr(o)dinger耦合方程组的同宿轨

非线性Schrdinger方程作为非线性发展方程的典型代表之一,受到了国内外学者的长期关注.人们已经得到了它的各种精确解,如行波解、孤波解、扭波解、同宿轨解等.但是,对非线性Schrdinger耦合方程组的研究却很少,未见其同宿轨解的研究成果.利用Hirota双线性方法,研究了非线性Schrdinger耦合方程组的同宿轨,获得了同宿轨的解析式.     

组合KdV-mKdV方程的孤立波

运用动力系统分叉理论研究自治系统（u,y）在各种参数条件下同宿轨的情况,进而研究组合KdV—mKdV方程孤立波的存在情况。     

(2+1)维Broer-Kaup-Kupershmidt方程的同宿轨道与孤立波解

用常微分方程的定性理论严格证明了(2+1)维Broer-Kaup-Kupershmidt方程的同宿轨道的存在性。并由同宿轨道与孤立波解的对应关系,从而证明了该方程孤立波解的存在性。数值模拟进一步验证了所得结论的正确性。     

（3＋1）维Jimbo-Miwa方程的新周期孤立波解

改进和推广了戴正德等提出的构造非线性演化方程周期孤立波解的同宿法,其关键思想是将拟解设定为三角函数和双曲函数的非线性组合形式.以（3＋1）维Jimbo-Miwa方程为例,说明通过改进的同宿法可以获得一系列新的周期孤立波解.此外,利用图形分析了周期孤立波解的特性.     

非线性Schr(o)dinger耦合方程组的同宿轨

非线性Schr(o)dinger方程作为非线性发展方程的典型代表之一,受到了国内外学者的长期关注.人们已经得到了它的各种精确解,如行波解、孤波解、扭波解、同宿轨解等.但是,对非线性Schr(o)dinger耦合方程组的研究却很少,未见其同宿轨解的研究成果.利用Hirota双线性方法,研究了非线性Schr(o)dinge...     

广义强色散DGH方程的新型孤立波解

研究一类浅水波方程即广义强色散DGH方程,通过转化为双线性形式,得到了双Hamilton结构和一些守恒量．通过7种拟设得到了该方程丰富的精确解：紧孤立波解（compacton）,多重紧孤立波解,光滑孤立波解,尖峰孤立波解（peakon）,移动尖峰孤立波解,周期解等,特别是得到了一类新型孤立波解即具有尖点或者奇异点的双孤立波解．     

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.