层结切变流体非线性惯性重力内波的稳定性

本文从层结切变流体的非线性惯性重力内波的方程组出发,设解为行波的形式并将非线性项在平衡点附近作Taylor展开,导得了两个变量的一阶自治动力系统的常微分方程组。应用常微分方程的稳定性理论,讨论了惯性重力内波的稳定性。分析指出:在考虑了速度垂直切变和非线性作用后,惯性重力内波的稳定性发生了变化,当LL_0时是稳定的结论只是在时才是正确的,当时,L_0~2<0和L>L_0成为不稳定的条件。 本文还讨论了某些条件下非线性惯性重力内波的解析解。     

Stochastic delineation of wellhead protection area in fractured aquifers and parametric sensitivity study

 In many countries, the setup of protection areas around every drinking water well was instituted at a national level in order to preserve the quality of water as well as the perennially of the resource. Wellhead protection surfaces have been defined using capture zones showing the area influenced by a well within a certain time. A stochastic method is developed for delineating time-related capture zones in fractured aquifers characterised by a low porosity and a high degree of fracturing. The flow velocity within the fractures is determined statistically depending on the distribution of the fracture features and the mass transfer solution is obtained through a particle tracking algorithm. Probabilistic capture zone curves are obtained as a function of the travel time of particles to the well and the percentage of particles apt to be extracted up to this time. A sensitivity study of fracture network parameters leads to the conclusion that orientations and aperture distribution of the fracture sets are of primary importance to the wellhead protection delineation.     

单绳冲抓锥自动脱挂装置的设计

介绍了单绳冲抓锥自动脱挂装置的结构和操作原理，通过对脱挂过程进行了的平衡分析，找出了影响脱钩灵活性和挂钩可靠性的主要因素，阐明了自动脱挂装置的设计原理。     

史料考证与找矿(之三)：铜矿

云南铜矿是历史上开发最早的地区之一,至今已知的大－中型矿区（除边远的羊拉、托顶之外）,历史上几乎都不同程度地被开采过。也有历史上曾采冶辉煌,但至今却没有铜矿产出,找铜工作者也不知道的“古老铜矿”,俞元（澄江）铜矿即是一例。研究、考证采铜史料,认为澄江铜矿、东川茂麓厂、寻甸铜矿、永平宁台厂等,应列为新世纪重新评价的找铜目标。     

测绘标准管理信息系统的设计与实现

测绘标准管理信息系统是标准信息化建设的主要内容，是测绘标准信息管理、应用及服务的重要基础支撑平台。本文结合开展测绘标准管理信息系统研究和建立的实际经验，根据标准信息建设与服务的技术现状和发展趋势，从设计要求、系统功能框架、标准信息管理、标准化工作管理、安全性和数据备份等方面介绍了测绘标准管理信息系统的设计思路，并就其实现方法和所采用的相应技术作了简单的叙述。     

网络时代气象影视节目的创意与制作

对网络时代气象影视节目的发展方向、节目定位、主持风格等问题进行探讨，并以一档以网络信息为切入点的气象资讯节目为例，详细介绍了其在播报方式、场景设置、节目内容、表现手法等方面做的一些新创意和新尝试。     

钻进过程孔内动态参数同步采集系统的研制

介绍了钻进过程孔内参数采集系统的组成原理,性能指标与特点,试验情况和应用前景。     

粤东莲花山地区锡矿矿产类型

锡矿是粤东优势矿种之一。在收集分析粤东莲花山地区61个锡矿床（点）成矿特征的基础上,对该地区锡矿床（点）矿产类型进行划分归类,建立了粤东莲花山地区锡矿工业类型,主要有为锡石-硫化物型、锡石-硅酸盐型、锡石-石英脉型、斑岩型4类;对4种不同类型锡矿床所具有的矿物组合进行归纳,并开展各类型代表性矿床综合研究,初步构建了4个类型代表性矿区的成矿模式图,为粤东地区锡矿研究提供了基础资料。     

Self-similar solution of hot accretion flows with ordered magnetic field and outflow

Observations and numerical magnetohydrodynamic (MHD) simulations indicate the existence of outflows and ordered large-scale magnetic fields in the inner region of hot accretion flows. In this paper, we present the self-similar solutions for advection-dominated accretion flows (ADAFs) with outflows and ordered magnetic fields. Stimulated by numerical simulations, we assume that the magnetic field has a strong toroidal component and a vertical component in addition to a stochastic component. We obtain the self-similar solutions to the equations describing the magnetized ADAFs, taking into account the dynamical effects of the outflow. We compare the results with the canonical ADAFs and find that the dynamical properties of ADAFs such as radial velocity, angular velocity and temperature can be significantly changed in the presence of ordered magnetic fields and outflows. The stronger the magnetic field is, the lower the temperature of the accretion flow will be and the faster the flow rotates. The relevance to observations is briefly discussed.     

基于模拟-优化模型的山东羊庄盆地地下水可开采量研究

为了准确量化与优化地下水水源地开采量,在分析山东羊庄盆地水资源分布特点、开发利用现状及存在问题的基础上,以区域经济发展和水资源可持续利用为前提,通过地质、水文地质资料的整理分析,建立起整个盆地地下水流概念模型;采用Visual Modflow模拟软件,并与优化模型软件Ground-Water Management Process(GWM)相耦合,以水源地开采量最大为目标,以水位不低于限定的控制水位为约束条件,评价出盆地最大可开采量为5 730万m^3/a;进而确定出宋屯、后石湾、南庄、魏庄、西石楼、许坡、龙山头、羊庄、东于、段庄以及王杭水源地的优化开采量分别为0.18万、1.40万、2.56万、1.86万、3.80万、1.70万、0.40万、0.40万、0.50万、1.40万和1.50万m^3/d。