裂峰映射倍周期分叉的复杂性

由于连续函数迭代映射的符号动力学在实际应用中的局限性，因此对非连续函数的符号动力学的研究是更具有实际应用的意义，正为人们普遍关注。混沌运动与周期轨道有着密切关系，本文讨论裂峰映射倍周期分岔过程中的复杂性，这表明裂峰映射通往混沌道路的多样性。并在可允条件下，简要给出倍周期生成规则的证明方法。

裂峰映射倍周期分岔规则与普适常数

讨论裂峰映射符号动力学中揉序列新的周期新倍化变化规则 ,并根据规则进行计算 ,得到一些Feigenbaum普适常数 .

煤有机硫分析中XPS分峰拟合方法及参数设置

通过对含硫模型化合物和新峪焦精煤中的有机硫含量的分析,对XPS谱图的分峰拟合方法和参数设置进行了探讨.结果表明,用XPS解析煤中不同形态硫含量时,应按2p3/2和2p1/2劈裂峰分峰方法进行,并设置劈裂峰的面积比约为2∶1,裂距为1.18 eV,L-G％相同,FWHM值也相同;限定各有机硫2p3/2峰峰位分别为：硫醇硫醚类硫162.1 ～163.6 eV;噻吩类硫164.0～164.4 eV;亚砜类硫165.0 ～ 166.0 eV,同时对分峰拟合参数在一定范围内进行动态微调,可实现良好的数据重现性和较佳的拟合度.

准噶尔盆地玛X井风城组页岩油含油性与岩性特征关系研究

近两年,随着准噶尔盆地玛湖凹陷风城组碱湖相页岩油的大力开发,页岩油大油区初步展现,勘探意义重大。鉴于页岩油含油性以及烃类赋存状态是页岩油甜点评价与优选的关键,以玛X井风城组页岩油岩心样品为研究对象,采用岩石热解分析、残余碳分析、X射线衍射分析、X射线荧光元素分析等技术,开展页岩油含油性与烃类赋存状态研究,并通过岩性分析找到页岩油含油性与岩性特征之间的关系。研究表明,玛湖凹陷风城组页岩油中,含油性与矿物分析中白云石含量负相关,与元素分析中镁、硅、钙相关性明显。研究成果为风城组页岩油进一步勘探开发提供了理论依据和技术支撑。

中板峰裂的研究与控制

中板表面峰裂是造成非计划改判的主要原因,通过系统的调查分析,认为该缺陷来源于铸坯内弧的横裂纹。造成横裂的原因除与钢种的化学成分有关外,还与保护浇注,设备保证性能有关。通过优化成分设计,提高保护浇注效果,保证连铸关键设备如结晶器、振动台、扇形段的控制精度能有效减少横裂纹的产生。

Dynamic behavior of rock during its post failure stage in SHPB tests

In order to investigate the micro-process and inner mechanism of rock failure under impact loading, the laboratory tests were carried out on an improved split Hopkinson pressure bar （SHPB） system with synchronized measurement devices including a high-speed camera and a dynamic strain meter. The experimental results show that the specimens were in the state of good stress equilibrium during the post failure stage even when visible cracks were forming in the specimens. Rock specimens broke into strips but still could bear the external stress and keep force balance. Meanwhile, numerical tests with particle flow code （PFC） revealed that the failure process of rocks can be described by the evolution of micro-fractures. Shear cracks emerged firstly and stopped developing when the external stress was not high enough. Tensile cracks, however, emerged when the rock specimen reached its peak strength and played an important role in controlling the ultimate failure during the post failure stage.

GaAs结构在单轴加压下的光致发光特性测试

研究了一种G aA s层结构在[110]方向外部单轴应力下基于光致发光(PL)谱的测试方法.层结构的应力由螺旋测微器施加,可以产生平面内的压(拉)应力和应变,大小可以由胡克定律算出.随着应力的增大,观察到了谱峰明显的蓝移.在一系列的加压后,在1.432 eV,有一个新的峰出现在原有的峰的肩部附近,随着压力增加,两个峰逐渐分开.同时PL峰的半峰宽随着应力增加而逐渐加大.最后,本文根据实验结果分析了静水和单轴应力的不同.

在不同应力下石墨烯中拉曼谱的G峰劈裂的变化

应用计及五阶近邻的力常数模型,研究了单轴应力下的石墨烯和芳香烃分子三明治型贴层的石墨烯中拉曼谱的G峰劈裂.计算结果表明对称性的降低解除了G峰对应的在Γ点的面内的纵波光学模声子和横波光学模声子能量简并,从而G峰劈裂为G+和G-两个峰.在单轴应力作用下,C—C键的伸长致使力常数减小,软化了面内的光学模声子,导致两个G峰都红移;芳香烃分子对石墨烯产生的沿分子长短边方向不同的应力作用,使得G峰对应的两支光学模声子的频率一支发生蓝移,而另一支发生红移.这解释了两种应力情况下石墨烯的拉曼谱实验中G峰不同的劈裂现象.

Physical and mechanical properties of sandstone containing a single fissure after exposure to high temperatures

In order to investigate the physical and mechanical properties of sandstone containing fissures after exposure to high temperatures,fissures with different angles α were prefabricated in the plate sandstone samples,and the processed samples were then heated at 5 different temperatures.Indoor uniaxial compression was conducted to analyze the change rules of physical properties of sandstone after exposure to high temperature,and the deformation,strength and failure characteristics of sandstone containing fissures.The results show that,with increasing temperature,the volume of sandstone increases gradually while the quality and density decrease gradually,and the color of sandstone remains basically unchanged while the brightness increases markedly when the temperature is higher than 585 ℃;the peak strength of sandstone containing fissures first decreases then increases when the temperature is between 25℃and 400℃.The peak strain of sandstone containing fissures increases gradually while the average modulus decreases gradually with increasing temperature,and the mechanical properties of sandstone show obvious deterioration after 400 ℃.The peak strain of sandstone containing fissures increases gradually while the average modulus decreases gradually with increasing temperature;with increasing angle αof the fissure,the evolution characteristics of the macro-mechanical parameters of sandstone are closely related to the their own mechanical properties.When the temperature is 800 ℃,the correlation between the peak strength and average modulus of sandstone and the angle α of the fissure is obviously weakened.The failure modes of sandstone containing fissures after high temperature exposure are of three different kinds including:tensile crack failure,tensile and shear cracks mixed failure,and shear crack failure.Tensile and shear crack mixed failure occur mainly at low temperatures and small angles;tensile crack failure occurs at high temperatures and large angles.

间断单峰映射倍周期分岔规则

讨论裂峰映射的四种类型交点的二倍化和三倍化规则，并根据可允条件，对倍化规则作简要证明．

基于模拟退火算法的NMR波谱重叠峰解析

提出了基于模拟退火算法的NMR波谱重叠峰全局优化解析方法。对苯酚样品的核磁共振1H谱中6.9ppm和7.2ppm化学位移处的裂分峰组进行了定量解析处理。在分别对4次、8次和16次扫描测量的各自10套1H谱处理中,拟合曲线与实验曲线之间的相关系数大于0.9986,峰面积比值的最大标准差小于0.05。结果表明模拟退火算法适用于NMR波谱重叠峰的解析。

阿莫西林双氯西林钠胶囊含量测定方法的改进研究

目的:改进现有阿莫西林双氯西林钠胶囊含量测定色谱系统中色谱峰易变形及裂分的缺陷,并建立一个新的高效液相色谱方法。方法:采用YWGC18色谱柱(250mm×4.6mm,10μm),流动相为含0.015mol.L-1十二烷基硫酸钠和0.03mol.L-1醋酸钠的溶液(用醋酸调节pH至4.2)-甲醇(80:20),流速1.0mL.min-1,检测波长为225nm。结果:在考察了不同离子对试剂和离子强度等因素对色谱系统中系统峰的形状和保留值的影响及系统峰对被分析物色谱峰形的影响后,对原先的方法进行改进。改进后阿莫西林浓度在0.87～34.9μg.mL-1范围内线性关系良好,r=1.000;双氯西林浓度在0.57～22.7μg.mL-1范围内线性关系良好,r=1.000。阿莫西林、双氯西林的平均回收率(n=3)分别为99.2%和100.2%;RSD分别为1.1%和2.1%。结论:本法准确,专属性好,可用作控制阿莫西林双氯西林钠胶囊质量的方法。