HRIR的空间特征抽取与特征分析

在自由声场中，抵达听者耳膜处的声音信号是随着声源的方向而变化的．由方向所决定的冲激响应被称作与头相关联的冲激响应（ＨＲＩＲ）．利用Ｋａｒｈｕｎｅｎ－Ｌｏｅｖｅ变换对归一化的ＨＲＩＲ作特征抽取．其主分量的特征与先前的许多心理物理实验结果十分吻合．     

悬索桥空缆状态下结构参数计算

考虑悬索桥成桥状态下两种线形进行计算：1）考虑一期恒载和二期恒载均匀分布,且由主缆单独承担,这种假定下的主缆线性为二次抛物线．2）考虑除主缆外的一期恒载及二期恒载作为多个集中力作用在各吊点处,此时主缆在各吊点之间为悬链线,这种方法称为分段悬链线法．在计算结构参数时考虑主缆的自重约束方程,即无应力状态下的自重荷载集度在施工过程中不断的变化,但是主缆总的质量是不变的。根据空缆状态下主索鞍的受力情况．以及中跨及边跨的无应力长度在空缆时与成桥状态是相等的并考虑自重约束方程,利用同伦算法及Aitken加速迭代技术进行计算,从而计算主索鞍的预偏量。根据求出的空缆状态下的水平力计算空缆理想状态下施工时安装索夹处各吊点的坐标．算例对比了两种计算方法．本文提出的两种方法计算精确且收敛快。     

刀具温度场对刀具表面覆盖膜的影响

研究了ＴｉＣ类硬质合金刀具切削Ｃａ－Ｓ易切不锈钢时，刀具温度场及其对刀具表面覆盖膜的影响。结果表明，覆盖膜形成时，在距主切削刃０．２５－０．５ｍｍ范围内，靠近前刀面处垂直前刀面的温度梯度比无覆盖膜时的温度梯度小得多，使覆盖膜／前刀面间的温度在切上过程中维持在８８０－５８０℃之间，为形成稳定覆盖膜创造了最佳温度环境。     

多指标综合评价的主成分分析模型及原理

多指标综合评价的主成分分析模型及原理白奕（陕西教育学院教务处，西安７１００６１；作者，男，５４岁，副教授）多指标的综合评价，目前普遍使用加权和作为评定标准［１～３］．为了改进用经验法或回归法确定权重的不足，作者主张采用多元统计分析中的主成分分析法，在...     

基于近红外光谱的棉纤维素纤维降解机理研究

近红外光谱技术已经有效应用于表征原材料和经过后整理的纺织产品．基于相对简单的近红外光易识别的化学基团（如：C—H，O—H和N—H），该技术已发展成为聚合物产品最重要的表征方法之一．通过近红外光谱分析定量化表征历史纺织品“Curtain Dress”中的棉纤维素纤维降解程度，研究同一棉纺织产品中引起诸如颜色等不同外观变化的纤维结构形态和大分子结构变化机理．利用Brimrose Luminar 5030近红外分析仪测试获得了“Curtain Dress”包括上身和裙子的8处不同程度褪色区域的近红外光谱，根据近红外光谱吸收峰识别了棉纤维素纤维的典型官能团C—H、C—O和0一H等．并通过主元分析法（PCA,Principle component analysis）分析了不同褪色区域的功能基团振动变化．研究发现第一和第二主成分的因子综合得分F很好地解释了分子中各组成键原子高达99．09％的振动变化程度，有效地反映了在褪色过程中纤维结构与形态变化机理．     

折线塔斜拉桥主塔力学特性的研究

以沈阳某折线塔斜拉桥为背景，从混凝土折线塔的受力特点出发，通过有限元数值法对混凝土折线塔主塔折角等关键部位的力学特性进行了分析研究.结果表明:主塔折角处存在严重的应力集中现象，但高应力区范围较小.折角处设置加劲板后，折角截面应力集中系数下降，加劲板消除了中跨侧塔壁平面外弯曲现象，同时折角部位加劲板内出现竖向拉应力.因此，设计时应适当加大加劲板腋角尺寸，并适当加强加劲板内的竖向主拉钢筋和表面防裂钢筋网.     

甲磺酸帕珠沙星紫外光谱性质的研究及应用

在0．1mol／L HCI介质中，甲磺酸帕珠沙星的紫外吸收最强且稳定，最大吸收峰在247nm处，另外在331nm处也有显著吸收．在247nm处，吸光度与药物质量浓度在0～30．0mg／L（R=0．99996）范围内呈线性关系，检测限为0．026mg／L,在331nm处，吸光度与药物质量浓度在0～90．0mg／L（R=0．99995）范围内呈线性关系，检测限为0．144mg／L．该方法操作简便快捷，灵敏度较高，体系稳定．用于合成样品中甲磺酸帕珠沙星的测定，结果满意．     

船用主锅炉模块化仿真模型

从物理机理出发，采用集中参数法，建立了船用主锅炉实时仿真的全工况非线性模块化数学模型，该模型适用于某型船用主锅炉的仿真分析，同样的方法也可以用来建立新型船用主锅炉的模型．该模型在船用蒸汽动力装置训练模拟器中得到了实现，其仿真结果与从实船测得的数据基本相符，精度满足仿真要求．     

沙棘叶水溶性多糖SJ21的研究

热水提取乙醇沉淀获得沙棘叶粗多糖，经酸性乙醇分级和DEAE-SephadexA-25纯化得多糖SJ21．纯度鉴定表明多糖SJ21为均一多糖，分子量约为70KD．单糖组成为Xyl、Ara、Man、Gal、Glc．摩尔比为1．0：2．1：5．3：3．7：2．9．多糖SJ21结构分析采用了UV、IR、高碘酸氧化、Smith降解、甲基化分析、GC、GC-MS和NMR等方法．结果表明：多糖SJ21主链由β-（1→4）Man基、β-（1→6）Gal基、β-（1→4）Glc基构成，其中Man在6-O处有分枝；Gal在3-O处和4-O处有分枝；支链由（1→4）、（1→3）Xyl基和（1→4）或（1→5）Ara基和（1→2、4）或（1→2、5）Ara；末端基为Glc、Gal、Ara．沙棘多糖SJ21是一新结构多糖，为首次从该植物中分离得到．     

用反常观点讨论Kerr-de Sitter黑洞在拖曳坐标系下的霍金辐射(英文)

在拖曳坐标系中，从反常的角度讨论了Kerr-de Sitter黑洞的霍金辐射．为了描述可观测的物理现象，我们忽略事件视界处的入射模和宇宙视界处的出射模来建立有效理论．结果表明，用来恢复事件视界和宇宙视界处的规范流和能动张量流精确地等于霍金辐射流．     

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.     

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.     

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.     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that