利用粘弹性原理研究岩层移动下沉

本文提出把岩石表示为开尔文体和弹性元件串联的力学模型,认为地下开采后的采空区上方和煤层上方的顶板为粘弹性基础上的粘弹性悬臂梁.根据悬臂梁受弯曲的理论,推导出了采空区和煤层上方地表下沉计算公式.     

Zircon U-Pb SHRIMP dating for the volcanic rocks of the Xiong’er Group: Constraints on the initial formation age of the cover of the North China Craton

The volcanic rocks of the Xiong‘er Group occur widely in the southern part of the North China Craton, which mark the beginning of the cover in the southern part of the North China Craton. The age of the volcanic rocks is thus crucial to understand the tectonic regime and evolutionary history of the North China Craton in the Proterozoic age. Zircons from five volcanic rocks and intrusions were dated by U-Pb SHRIMP method. The results indicate that the Xiong‘er Group formed in 1.80--1.75 Ga of Paleo-Proterozoic. Since the Xiong‘er Group formed earlier than the Changcheng System, the earliest rocks in the Changcheng System is therefore assumed to be formed in 1.75 Ga. A thermal-tectonic event of ca. 1.84 Ga is indicated by new zircon U-Pb SHRIMP ages in the southern part of the North China Craton. The volcanic rocks of the Xiong‘er Group thus represent the initial magmatism of the Paleo-Proterozoic breakup of the North China Craton. Numerous inherited zircons in the volcanic rocks mainly formed in ～2.20 Ga, indicating that the source magma of the volcanic rocks may be derived from the ～2.20 Ga crust, or from a mantle magma with significant contamination of the ～2.20 Ga crust.     

Synthesis and characterization of semiconductor zinc sulfide nanotubes by soft-template method

ZnS nanotubes have been successfully synthe-sized from solutions containing a surfactant, Triton X-100(t-octyl-(OCH2CH2)χOH, χ=9, 10). X-ray diffraction (XRD),transmission electron microscope (TEM) and selected areaelectron diffraction (SAED) are employed to characterize thestructure and morphology of as-synthesized product. XRDand SAED pattern indicate that as-obtained products consist of pure polycrystalline cubic-phase ZnS structures. TEM images reveal that most of the products are tubular struc-tures, with diameters ranging between 37--52 nm andlengths up to 3 μm. The wall thickness of as-obtained ZnSnanotube is around 9 nm. The growth mechanism of ZnSnanotubes has also be proposed.     

宏观经济智能决策支持系统MEIDSS

ＭＥＩＤＳＳ是一个大型的智能软件系统，本文介绍ＭＥＩＤＳＳ的总体结构和功能特征，主要集中于面向对象（００Ｍ）和ＡＩ相结合的系统开发方法，以及ＭＥＩＤＳＳ实现仿真决策问题自动求解的技术.     

Beatty序列中的无平方因子数

用三角和估计方法研究了无平方因子数在Ｂｅａｔｔｙ序列「ｎθ」中分的布，这里θ〉１是实数，并得到了一个比较强的渐近公式。     

五行学说和“天人相应”的数学模型

本文给出了五行学说和“天人相应”这两个中国古典哲学理论的数学模型,论证了这两个理论和现代控制论的一致性。     

对玻璃池窑硅质耐火材料侵蚀机理的研究

对玻璃池窑硅质耐火材料侵蚀机理进行了研究，结果表明，碱性氧化物从接触介面向砖体内部扩散，是硅质耐火材料侵蚀过程中的主要形式，扩散的深度往往是随砖体的熔融而逐步加深，同时硅质耐火材料的侵蚀还与硅砖内晶相的重结晶及多晶转变有关。了解与掌握硅质耐火材料侵蚀机理，以便采取相应措施，尽量延长池窑的使用寿命     

对《中国经济地理》教材中人口迁移部份的商榷

本文认为,高师统编教材《中国经济地理》中应增加人口迁移的概念及其分类体系的内容,其中插图也有多处应修改。     

理想状态下物理（热）钢化玻璃定量分析

通过对理想状态下玻璃热钢化的分析与推导，给出一个相应的系统的数学描述。