混沌理论在会计学中的运用

混沌理论是自然科学在非线性系统研究方面取得的重大理论突破，任何事物都是外在的混乱与内在的有序的统一，在混沌中隐含了一种有序。介绍了混沌理论的含义和特征，运用混沌理论对会计学中的某些现象进行了分析。     

复合材料层合板表面椭圆形分层非线性屈曲分析

基于修正型Ｈａｈｎ－Ｔｓａｉ非线性本构模型，利用Ｒａｙｌｅｉｇｈ－Ｒｉｔｚ法，研究了复合材料层合板表面椭圆形分层非线性屈曲性态．采用阻尼因子法有效地克服了非线性迭代过程中屈曲应变的振荡现象．数值结果表明：某些层合板椭圆形分层非线性临界应变与线性临界应变有明显差别．     

Cu—Zn—Al合金表达非线性振荡花样

应用透射电镜进行原位晶体结构分析，证实该类合金中密排六方结构相有两类晶胞，它们会发生长大、缩小的变化，应用薛罗根模型及其非线性学方程分析了这种固态相变中的自组织现象，从理论上证明了该现象是固态合金中的一种耗散结构，这种结构的产生与系统和环境的交互作用密切相关。     

Cu-Zn-Al 合金表面非线性振荡花样——自组织现象

应用透射电镜进行原位晶体结构分析，证实该类合金中密排六方结构相有两类晶胞，它们会发生长大、缩小的变化．应用薛罗根（Ｓｃｈｌｏｇｌ）模型及其非线性动力学方程分析了这种固态相变中的自组织现象，从理论上证明了该现象是固态合金中的一种耗散结构，这种结构的产生与系统和环境的交互作用密切相关．     

影响机床颤振的几个非线性因素及其数学模型

本文研究了机床结构中的非线性刚度、切削过程中的后角限制、刀刃轨迹部分地越出工件材料和非线性切削力等几种非线性因素对于机床颤振过程的影响,及其相应的数学模型;同时评述了某些研究者过去所进行的工作及其结论.本文还分析了机床的非线性颤振理论的研究中所面临的一个重大困难——现今在线性理论的研究中用得十分成熟的一套电磁激振技术,根本无法揭示机床结构的非线性特征,并指出了解决这一困难的可能途径.     

功率变换器中的混沌及控制方法

功率变换器由于其开关工作特性,变换器的拓扑结构不断变化.功率开关变换器被认为是一个固有开关非线性系统,因此其运行过程中必然存在着丰富的非线性现象,如分岔和混沌等.主要表现为诸如转速、转矩的间歇振荡,运行状态的突然崩溃,不明的电磁噪声等.针对功率变换器中的混沌现象,介绍了混沌的基本概念和基本特征,混沌的判别方法;综述了DC-DC功率变换器和电气传动系统中的混沌现象及控制方法;提出了如何利用混沌的某些特性,研究电气传动系统新的控制方法,设计新型的软开关变换器;最后,给出了新型混沌软开关变换器的工作原理及设计方法.指出功率变换器中的混沌研究是一很有发展前景的研究方向.     

BUCK变换器中的混沌现象与输出电压稳定的研究

由于存在非线性开关元件,BUCK型DC-DC功率转换器的拓扑结构不断变化,因此在电路实际运行过程中必然蕴涵着十分丰富的非线性现象如分岔、混沌。本文以BUCK电路为例,通过典型电路模型建立电路数学模型,分析电路中的非线性现象与输出电压的关系。通过MATLAB/SUMILINK仿真验证了BUCK电路数学模型和数学分析的正确性,最后从混沌现象用MULTISIM分析探讨输出电压稳定性。     

经济混沌的动因与预测

经济混沌是非线性经济系统中呈现的一种貌似随机不确定现象．本文通过对经济混沌的动因分析，指出温沌是经济系统的本质特性；根据混沌的有序性，提出经济混沌预测的基本原理；给出一个甚于混沌吸引子的时间序列预测方法，指出影响预测效果的主要因素．     

脆性断层形成的递进连通模型

发育于地壳浅层中的脆性断层常常由一系列次级小断层形成，在结合岩石力学试验“微” 观特征和地质学野外观测“宏”观现象的基础上，建立了脆性断层形成由微裂纹→缝合线状裂缝→宏观断层→超大断裂的递进连通模型，并分析了裂缝递进连通的机制，解释了模型中断裂呈波状弯曲，连接分支及断裂逐渐与在主应力夹角变小的现象。     

陀螺稳定平台的非线性失稳与抖振

本文的目的在于指出高精度陀螺稳定平台可能出现非线性失稳及抖振等非线性现象并说明其发生的规律。在评论了已有资料讨论此类非线性现象时的缺陷之后,针对陀螺稳定平台某些具体的因素抽象出非线性系统模型。使用了谐波线性化的描述函数方法来研究这些非线性系统,特别着重考察了出现非线性失稳和抖振的可能性。给出了典型参数下的计算结果,并提出了既能保证平台精度又能避免非线性失稳的可能技术方案。     

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.