Rosenau-KdV方程的一个非线性守恒加权差分逼近

利用LXA加权差分格式的构造思想,在空间层引入加权系数,对Rosenau-KdV方程的初边值问题进行数值研究,提出了一个三层非线性加权差分格式,合理模拟了该问题的两个守恒性质,得到了差分解的先验估计,并利用离散泛函分析方法分析了格式的二阶收敛性与无条件稳定性.数值实验表明,该方法是可靠的,且适当调整加权系数可以大幅提高计算精度.     

耗散SLRW方程的一个新的守恒差分逼近

利用Lax格式的离散思想,引入加权系数,对耗散对称正则长波方程的初边值问题提出了一个带有加权系数a的3层线性差分格式,格式合理地模拟了问题的2个守恒律,得到了差分解的先验估计,分析了该格式的二阶收敛性与稳定性.数值实验表明,该方法是可信的,且适当调整加权系数,可以大幅提高计算精度.     

Rosenau-KdV方程的一个线性守恒加权差分逼近

利用LXA加权差分格式的构造思想,在空间层引入加权系数,对Rosenau-KdV方程的初边值问题进行了数值研究,提出了一个具有二阶精度的三层线性空间加权差分格式,该格式合理地模拟了原问题的两个守恒性质,给出了差分解的先验估计,分析了差分解的存在唯一性,用离散泛函分析方法证明了该格式的无条件稳定性与收敛性。数值算例表明,该加权方法是可靠的,且适当调整加权系数可以大幅提高计算精度。     

Rosenau-RLW方程的非线性守恒差分格式

对Rosenau-RLW方程的初边值问题研究差分数值计算方法,提出了一个带有加权系数θ的两层非线性差分格式。格式模拟了方程的两个守恒量,并利用差分解的先验估计和能量方法分析了该格式的二阶收敛性与无条件稳定性。数值结果表明,适当调整加权系数θ,可以大幅提高格式的计算精度。     

耗散SRLW方程的一个非线性守恒加权差分算法

我们对具有耗散项的对称正则长波方程的初边值问题进行了数值研究,提出了一个带有加权系数θ的两层Crank-Nicolson差分格式,格式合理地模拟了问题本身的两个守恒量.在差分解的先验估计基础上我们用能量方法分析了该格式的二阶收敛性与无条件稳定性.数值试验表明该方法是可信的,且适当调整加权系数θ可以大幅提高格式的计算精度.     

Rosenau-RLW方程的非线性守恒差分格式

对Rosenau-RLW方程的初边值问题研究差分数值计算方法,提出了一个带有加权系数θ的两层非线性差分格式。格式模拟了方程的两个守恒量,并利用差分解的先验估计和能量方法分析了该格式的二阶收敛性与无条件稳定性。数值结果表明,适当调整加权系数θ,可以大幅提高格式的计算精度。
     

Rosenau-KdV方程的一个线性守恒加权差分逼近

利用LXA加权差分格式的构造思想，在空间层引入加权系数，对Rosenau-KdV方程的初边值问题进行了数值研究，提出了一个具有二阶精度的三层线性空间加权差分格式，该格式合理地模拟了原问题的两个守恒性质，给出了差分解的先验估计，分析了差分解的存在唯一性，用离散泛函分析方法证明了该格式的无条件稳定性与收敛性。数值算例表明，该加权方法是可靠的，且适当调整加权系数可以大幅提高计算精度。
     

Rosenau-RLW 方程的加权守恒差分格式

本文对Rosenau-RLW方程初边值问题的数值解法进行了研究,提出了一个三层的加权差分格式,该格式较好地模拟了方程的守恒性质.然后本文讨论了差分解的存在唯一性,给出了差分解的先验估计和误差估计,并利用能量方法分析了该格式的二阶收敛性、无条件稳定性.数值算例验证了格式的可靠性,并且适当调整加权系数还可以提高计算精度.     

Rosenau-Burgers方程的一个新的差分方法

从动力学系统的实际问题出发,针对Rosenau-Burgers方程的初边值问题进行了数值研究,揭示了复杂离散动态系统理论中非线性波耗散问题. 在方程求解的时间和空间区域,采用网格化方法,提出了一个新的三层隐式差分格式,对差分解进行了先验估计,并给出了该格式的稳定性和收敛性的严格理论证明. 数值实验的结果表明,差分格式简单而有效、计算速度快、稳定性好,并且差分格式使用了加权方法,使其具有普遍意义和推广价值.     

Rosenau-Burgers方程的加权隐式差分方法

作者对Rosenau-Burgers方程的数值解法进行了研究,对该方程的初边值问题提出了一个三层加权隐式差分格式,讨论了差分解的存在唯一性,并分析了格式的收敛性和稳定性.数值实验验证了方法的有效性,且效果较好.     

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.     

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。     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.