我国金耳资源及其开发利用研究

本文介绍了我国的金耳资源，报道了金耳的营养万分，药用功效和食疗价值，集体离金耳的人工驯工栽培技术，简单介绍了金耳产品的加工概况，并对今后工作进行了展望，为进一步开发利用提供了较系统的资料。     

基于无人机影像样本的遥感图像分类方法

对于遥感图像计算机自动分类而言,样本选择至关重要,直接影响分类结果精度。为了提升样本选取的质量,本文在实验区卫星影像覆盖范围内选取了几个样本点。对每个样本点利用无人机采集了约0.3 km2的数据,通过后期处理生成正射影像。在正射影像中选取耕地、植被、水体、建筑和道路等几类地物的样本,采用最大似然值法对卫星影像进行相应类别信息提取。实验结果表明：在无人机高分辨率影像上解译的样本作用于卫星遥感影像,并利用最大似然值法进行信息提取,其方法可行,分类精度优于在卫星影像上选择的样本。     

非线性支持向量机在油气预测中的应用

油气预测的传统方法通常是基于经验风险最小化准则,但在有限样本情况下,预测效果并不理想.研究引入基于结构化风险最小化准则的非线性支持向量机方法,通过对推广误差界的最小化达到最大的泛化能力和全局最优,时于小样本数据,该方法具有可靠的预测能力.在对四川观音场构造面新统上部碳酸盐岩储层数据处理中.通过实例试算,结果表明该方法有效可靠,预测精度高,与已知结果吻合较好.     

基于TLS的滑坡形变分析方法研究

以四川理县一地质滑坡为例,分析扫描点空间位置的理论精度,探讨点云数据获取以及点云过滤、点云拼接、地理参考等数据预处理的关键技术,给出一套比较直观、全面的滑坡形变分析方法,包括基于点云比较的形变分析、基于TIN比较的形变分析、基于特征点的形变分析以及基于DEM的形变分析。为了充分利用非地面点云数据,提出一种提取滑坡区域电线杆、树干的几何特征来分析滑坡水平变化的新方法。通过分析得到的滑坡形变量与GNSS远程实时监测结果基本一致。     

Status of the Recent Declining of Arctic Sea Ice Studies

In the past 30 years, a large-scale change occurred in the Arctic climatic system, which had never been observed before 1980s. At the same time, the Arctic sea ice experienced a special evolution with more and more rapidly dramatic declining. In this circumstance, the Arctic sea ice became a new focus of the Arctic research. The recent advancements about abrupt change of the Arctic sea ice are reviewed in this paper .The previous analyses have demonstrated the accelerated declining trend of Arctic sea ice extent in the past 30 years, based on in-situ and satellite-based observations of atmosphere, as well as the results of global and regional climate simulations. Especially in summer, the rate of decrease for the ice extents was above 10% per decade. In present paper, the evolution characteristics of the arctic sea ice and its possible cause are discussed in three aspects, i.e. the sea ice physical properties, the interaction process of sea ice, ocean and atmosphere and its response and feedback mechanism to global and arctic climate system.     

“塞上江南”好风光——宁夏回族自治区加强基本农田保护的经验

近年来,被誉为“塞上江南”的宁夏回族自治区,始终坚持保护耕地和节约用地两个最严格的管理制度有机统一,加强领导,落实共同责任,使全自治区基本农田总量没减少,用途未改变,质量有提高。2008年11月7日至11日,由国土资源部、农业部和国家统计局组成的联合抽查组对宁夏耕地保护责任目标履行情况进行了严格检查,对全自治区加强耕地和基本农田保护工作给予了充分肯定。     

Josephson junction of two-species Bose-Einstein condensates in a high-finesse optical cavity

The mean-field dynamics of undistinguishable two-species Bose Josephson junction coupled to a single mode high-finesse optical cavity is investigated. From the Hamiltonian, the phase portrait and the stationary points are given. It is shown that the role of the interspecies interaction equals the intraspecies interaction under suitable conditions. As the interspecies interaction increases, the trapped atoms will start tunneling between the two wells unnaturally for some special cases.     

下地壳及壳幔过渡带化学不均一性──河北汉诺坝地区深源捕虏体元素地球化学证据

河北汉诺坝玄武岩中长英质麻粒岩、镁铁质麻粒岩和辉石岩捕虏体的主量元素和微量元素特征,反映了下地壳及壳幔过渡带组成具有高度化学不均一性。不相容元素原始地幔标准化曲线特征的差异表明捕虏体成因复杂。MgO与不相容元素无或仅有很弱的相关性,与相容元素的相关性则相对较明显。这些特征反映了下地壳及壳幔过渡带存在较强和多元的混合作用。捕虏体的加权平均值比基于麻粒岩地体资料估算的下地壳平均组成偏基性,揭示了二者可能的成因差异。