随机时滞Hopfield型神经网络的几乎指数稳定性

利用Lyapunov泛函和Ito公式，研究了具有时滞的随机Hopfield型神经网络的几乎指数稳定性，证明了一个定理和两个推论．当随机扰动为0时，得到确定性的时滞神经网络指数稳定性的结果．     

随机时滞Hopfield神经网络的均方指数稳定性

利用Ｌｙａｐｕｎｏｖ泛函数和Ｉｔｏ公式，研究了具有时滞的随机Ｈｏｐｆｉｅｌｄ型神经网络的均方指数稳定性，证明了三条定理和三个推论，当随机扰动这零时，便得到确定性的时滞神经网络指数稳定的结果。     

变时滞Cohen-Grossberg 随机神经网络的矩指数稳定性

本文讨论了随机变时滞Cohen-Grossberg神经网络的矩指数稳定性.利用Ito公式、时滞微分不等式和神经网络的特征，作者导出了这类神经网络矩指数稳定性的代数条件并给出了一个说明性实例.     

随机区间时滞Hopfield 神经网络的指数稳定性

讨论了一类带有可变时滞的随机区间Hopfield神经网络的指数稳定性,利用李雅普罗夫函数和Razunlinkhin-定理,得到了一些关于该系统均方指数稳定与几乎必然稳定的时滞无关和时滞相关的充分性判据,推广了现有文献中关于定常时滞及其确定形式的一些结果．     

变时滞Cohen-Grossberg随机神经网络的矩指数稳定性

本文利用随机积分的伊腾公式,时滞微分不等式及随机时滞神经网络的特性 讨论变时滞Cohen-Grossberg随机神经网络的矩指数稳定性,实例证明本文结果的优越性.     

变时滞细胞神经网络的全局指数稳定性

研究了一类变时滞细胞神经网络平衡点的全局指数稳定性问题．在不要求激励函数全局Lipschitz条件下，利用Lyapunov函数方法和M-矩阵的特性，结合Young不等式和Halanay时滞微分不等式，得到了细胞神经网络模型在一定条件下全局指数稳定的一些充分条件．数值例子说明了本文结果的有效性．     

具有混合时滞的随机Cohen-Grossberg神经网络的稳定性分析

研究了均方意义下的具有时变时滞与分布时滞的随机Cohen-Grossberg神经网络的指数稳定性,利用It微分公式和Lyapunov泛函,得到了一个关于其指数稳定时滞无关的充分条件.具体实施方法是运用It微分公式沿所考虑的神经网络对构造的Lyapunov泛函进行微分,得到了系统稳定的代数判据.最后,通过一个数学样例说明了所得结论的有效性.目前文献尚未见同时具有时变时滞与分布时滞的随机Cohen-Grossberg神经网络的指数稳定性的相应结果,由于Cohen-Grossberg神经网络更具有代表性,其研究意义与应用前景不言而喻.     

不确定随机神经网络的几乎必然指数稳定

为了探讨带有时变时滞的不确定随机神经网络的几乎必然指数稳定问题,通过构造一个合适的李雅普诺夫函数,利用李雅普诺夫函数法、随机分析法及线性矩阵不等式得到了不确定随机神经网络的几乎必然指数稳定的充分条件,验证了已知条件满足引理,表明带时滞的随机系统在时滞小于某个上界时,带时变时滞的不确定随机神经网络是几乎必然指数稳定的。所给出的判据是由线性矩阵不等式表示的,该判据是否有解可以通过Matlab工具箱快速地得到解决。     

关于时滞细胞神经网络全局稳定性的一些注记

首先证明具有时滞的细胞神经网络平衡点的一个存在性定理．然后，利用这定理分别得到该类神经网络的全局渐进稳定性与全局指数稳定性的判据各一个．最后，给出利用所得的新判据判别时滞细胞神经网络的全局稳定的两个例子。     

具有混合时滞Cohen-Grossberg随机神经网络的均方指数稳定性

研究了具有时变时滞与分布时滞的随机Cohen-Grossberg神经网络的均方指数稳定性.运用It微分公式沿所考虑的神经网络对构造的Lyapunvo函数进行微分,利用时滞微分不等式得到其均方指数稳定的几个充分判据.仿真例子证明了结果的有效性.     

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.     

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.