雷歌源头及传播原点探析

在雷州半岛民系结构变迁史与我国悠久而顽强的民歌传统等众多因素作用下,闽南民歌获得落地三雷的历史机遇,并随着雷话的生成及扩张进而本土化生成富有本土气息的雷歌,获得当地民众的文化认可,成为雷州文化重要构成之一。     

An Economical Approach to Flow-Adaptive Moderation of Spurious Ensemble Correlations and Its Application in the Proper Orthogonal Decomposition-Based Ensemble Four Dimensional Variational Assimilation Method

The purpose of this study is to describe an economical approach to an existing adaptive localization technique and its implementation in the proper orthogonal decomposition-based ensemble four-dimensional variational assimilation method(PODEn4DVar). Owing to the applications of the sparse processing and EOF decomposition techniques, the computational costs of this proposed sparse flow-adaptive moderation(SFAM) localization scheme are significantly reduced. The effectiveness of PODEn4 DVar with SFAM localization is demonstrated by using the Lorenz-96 model in comparison with the Smoothed ENsemble Correlations Raised to a Power(SENCORP) and static localization schemes, separately. The performance of PODEn4 DVar with SFAM localization shows a moderate improvement over the schemes with SENCORP and static localization, with low computational costs under the imperfect model.     

基于小波变换的畸形波海况时频分析研究

在随机海浪条件下,基于修正的四阶非线性薛定谔方程(m NLS)能够有效地模拟畸形波的非线性演化,文中利用小波变换对演化过程进行分析,并对时频谱特征参数(能量集中区域在时域和频域的分布范围)以及能量集中度进行了定量描述,结果表明,当畸形波出现时,能量可以由低频向高频扩散且能量集中度相对较大。     

太平洋牡蛎中Cg-IL-17和Cg-TGF-β的表达及其免疫作用的研究

目的:探讨Cg-IL-17和Cg-TGF-β在太平洋牡蛎中表达的组织定位、免疫作用及其可能的机制。方法:采用Real-time PCR、原位杂交和图像分析的方法进行研究。结果:实时定量PCR研究表明,Cg-IL-17和Cg-TGF-β在弧菌感染后的太平洋牡蛎的鳃、外套膜、心包液、唇须、消化道和闭壳肌中表达明显增强。原位杂交实验结果表明,Cg-IL-17和Cg-TGF-β在未染菌组牡蛎的消化道、消化腺、鳃、唇须、外套膜中都有表达;染菌组以上各组织中的Cg-IL-17和Cg-TGF-β表达量均有显著增高,而消化道、消化腺中的表达量明显高于其他组织,闭壳肌中也均有微弱表达;感染弧菌前后两种基因在性腺中均未见表达。相关性分析发现这两种基因表达量在唇须和外套膜中具有明显的相关性。结论:Cg-IL-17和Cg-TGF-β具有多种生物学效应,且都参与了太平洋牡蛎的固有免疫反应;消化道可能是牡蛎主要的免疫反应器官之一;Cg-IL-17和Cg-TGF-β在唇须和外套膜中可能存在调控关系或协同作用。     

青藏高原东北部HDA算法检验评估及参数本地化

利用2006-2011年CINRAD/CD雷达在青藏高原东北部(以下简称高原)探测到的110次强对流风暴过程,运用WSR-88D冰雹探测算法(HDA)计算强冰雹指数(SHI)和最大预期冰雹直径(MEHS)并进行探测效果检验.提出对HDA原默认参数进行本地化并给出本地化方案,明显地改善了探测效果,正确率由85％提高到89％,虚警率由41％降低到21％,临界成功指数由53％升高到75％,MEHS大于观测尺寸的百分比由74％降到33％.结果对CINRAD/CD雷达探测冰雹有重要参考价值.     

Development characteristics and construction prospects for a multi-integrated economic zone in the South China Sea Region

The Belt and Road Initiative(BRI)instigated by China is catalyzing the evolution of a new global economic landscape.To cope with the great changes in the economic landscape,China needs to view the South China Sea Region(SCSR)as a strategic focus and study carefully the characteristics of regional development and explore the possibility for construc-tion of a strategic multi-integrated economic zone which includes China and ASEAN countries.Based on key indicators,this paper outlines the overall development characteristics of the SCSR and analyzes the regional structural characteristics of industry and global trade based on the indexes of industrial structure similarity and trade commodity structure coincidence;the paper also depicts the spatial characteristics of the nine core growth areas(CGAs)in the region and discusses the construction prospects for a multi-integrated economic zone in the SCSR.The results show that,first,from 2000 to 2017,the main economic indicators of the SCSR grew quite well,and the development trend was much better than the global average for the same period.Second,driven by the global industrial transfer stages and spatial paths,the level of comprehensive development in the SCSR has evolved into four categories.Third,the index values for industrial structure similarity and trade commodity structure coincidence for the 11 countries in the SCSR have remained at a high level,and reveal an integration trend not only from the horizontal and vertical perspective,but also from an upgrading and downgrading standpoint.Fourth,nine CGAs have been established in the SCSR and the advantaged industries and the export commodity types between different countries exhibited the characteristics of convergence and complementarity due to the polarization and diffusion effects of the CGAs.Finally,from a long-term perspective,the SCSR has already acquired the internal and external conditions such as the 5th global industrial transfer initiative,the reconstruction of the global value chain,regional production-consumption networks and spa-tial entities for building a multi-integrated economic zone in the SCSR.     

基于GIS的云南普朗斑岩铜矿床三维成矿预测

文章根据云南普朗斑岩铜矿床地质特征以及矿区72个见矿钻孔中8145个岩芯样品的铜含量分析数据,采用GIS空间分析技术和利用邻近距离统计分析方法,优化和提取了矿床定位预测所需点位的数据信息(包含三维空间坐标及其对应的铜含量数值)。在此基础上,选用反距离权重内插法,在比例尺1:10000的尺度上,确定了该矿区铜元素在海拔3171～4319m不同高度的空间分布状况,并利用3D-GIS的规则六面体成像技术和邻近采样点插值法,建立了该铜矿床含矿岩体(铜含量不小于0.2%)和铜矿体(铜含量不小于0.3%)的三维模型,确定含矿岩体和铜矿体的形态为"锥状体"。最后,在综合分析云南普朗铜矿床特征及其保存条件和剥蚀状况以及钻探资料和矿床三维空间特征的基础上,确定矿床的南西侧具有较好的找矿潜力,认为矿床的东、北两侧深部是有利的成矿远景区。     

地震资料的高阶伪希尔伯特变换边缘检测

构造了一种用于边缘检测的高阶伪希尔伯特变换,它吸收了时频分析的局部化特性和传统希尔伯特变换的思想,调节其时窗宽度和阶数可以实现不同的输出.信号模型及实际图像的处理结果表明,高阶伪希尔伯特变换能提取出各种类型的边缘信息,边缘表达完整、定位准确.利用这一方法对实际地震资料进行了处理,它能突出地震资料的奇异信息.可用于描绘地层精细结构,地层的识别和追踪,裂缝、河道和断层的检测.     

时频误差分析法在地震信号分析中的应用

时频误差分析法与常规的误差分析法相比,既能反映地震信号的振幅误差,也能区分其相位误差.通过连续小波变换的时频误差分析法,分析了平面地震波在复杂构造中含随机介质及其对应构造的各向同性介质模型中的共炮点合成地震记录的时频振幅误差和时频相位误差.研究结果表明,随机介质的振幅比各向同性介质的振幅衰减大,且随机介质的频率也较各向同性介质的频率为宽.     

基于分叉理论的岩体局部化现象研究

为了研究岩体局部化现象,基于轴向压杆稳定实例,运用数理和力学知识,根据Drucker-Prager（简称D-P）准则,推导了基于分叉理论的通用表达式。在此基础上,结合有限差分理论得出FLAC3D计算中岩体内发生分叉的判定条件,之后在自带的FISH编译语言的辅助下,在FLAC3D中建立数值分析模型,采用D-P本构关系,研究了岩体局部化现象及其发展过程。研究结果表明：在FLAC3D中以20 000步为间隔所得的不平衡力比率模型系统逐渐趋于稳定,不平衡力比率逐渐降低,局部化现象的规模逐渐扩大至稳定,清晰度逐渐增加,证实了分叉理论能够有效地分析研究岩体局部化现象。给出的岩体局部分叉判定条件和数值验证,较为科学合理地阐述了常用分叉判定条件的由来,为解释岩体局部化现象的机制和过程提供了理论支撑,从而对岩体局部化现象研究起到了一定的推进作用。