河南祁雨沟金矿床冰长石中自然铜超显微包体的发现及成因   总被引：1，自引：1，他引：1  

栾文楼 《矿物学报》1991,11(3):281-284,F001

经透射电镜研究,在祁雨沟金矿床的冰长石中发现有自然铜超显微包体。作者认为这种超显微包体是在低fs_2、fo-2、富Cl的条件下形成,Cu是以CuCl-2~-络合物形式搬运。晶出的自然铜被正在结晶的冰长石捕获,使其封闭起来,未受到后来富fs_2流体的作用。  相似文献   

Analysis and prevention of sinkhole collapses during the reconstruction and extension of Guang-Qing freeway,china   总被引：1，自引：0，他引：1  

Zhanfei Gu  Qi Liu  Yaoru Lu  Zhenming Shi  Gaoyu Su  Dexiang Luan 《Environmental Earth Sciences》2016,75(9):788

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Review of Development and Application of High Resolution Global Climate System Model   总被引：1，自引：0，他引：1  

Luan Yihua  Yu Yongqiang  Zheng Weipeng 《地球科学进展》2016,31(3):258-268

Climate models have been used as an important tool to quantitatively study climate variability and to predict or project climate change in the future. One of the most important pathways for development and improvement of climate system model is to increase the spatial resolution and improve the corresponding physical parameterization schemes, which is very important for understanding climate change and improving climate prediction skill. Based on a brief introduction of the importance of developing high-resolution global climate system model, a review of recent progresses in the development and application of high-resolution models was summarized. The paper also introduced the current situation and problems for the development and evaluation of high-resolution models and focused on the key scientific and technical bottlenecks which restrict the development of high-resolution models, including the development of dynamic framework of the high-resolution ocean and atmospheric models and massive high performance parallel computing, the improvement of the sub-grid physical parameterization scheme, and mesoscale air-sea interaction. Meanwhile, the scientific objects and experiments design of the international high resolution climate model intercomparison project (HiResMIP) of the coupled model intercomparison project phase 6 (CMIP6) was introduced. Finally, we prospect the future developments and evaluations of high-resolution climate models in China was proposed.  相似文献   

<Emphasis Type="Italic">Grateloupia ramosa</Emphasis> Wang &amp; Luan sp. nov. (Halymeniaceae,Rhodophyta), a new species from China based on morphological evidence and comparative <Emphasis Type="Italic">rbc</Emphasis>L sequences     

曹翠翠  刘淼  郭少茹  赵丹  栾日孝  王宏伟 《中国海洋湖沼学报》2016,34(2):283-294

Grateloupia ramosa Wang & Luan sp. nov. (Halymeniaceae, Rhodophyta) is newly described from Hainan Province, southern China. The organism has the following morphological features: (1) purplish red, cartilaginous and lubricous thalli 5–10 cm in height; (2) compressed percurrent axes bearing abundant branches with opposite arrangement; (3) claw-like apices on top, constricted to 2–4 cm at the base; (4) cortex consisting of 3–6 layers of elliptical or anomalous cells and a medulla covered by compact medullary filaments; (5) reproductive structures distributed throughout the thallus, especially centralized at the bottom of the end portion of the branches; and (6) 4-celled Carpogonial branches and 3-celled auxiliary-cell branches, both of the Grateloupia-type. The morphological diff erences were supported by molecular phylogenetics based on ribulose-1, 5-bisphosphate carboxylase/oxygenase (rbcL) gene sequence analysis. There was only a 1 bp divergence between specimens collected from Wenchang and Lingshui of Hainan province. The new species was embedded in the large Grateloupia clade of the Halymeniaceae. The pairwise distances between G. ramosa and other species within Grateloupia ranged from 26 to 105 bp, within pairwise distances of 13–111 bp between species of the large genus Grateloupia in Halymeniaceae. Thus, we propose this new species as G. ramosa Wang & Luan sp. nov.  相似文献   

基于蜂群算法的城市土地利用变化建模     

章欣欣  栾海军  花利忠 《地理科学》2016,36(3):359-366

通过引入人工蜂群算法用于构建土地利用变化的驱动力模型,分析土地利用变化的驱动力机制。算法原理通过模仿蜜蜂采蜜行为,自动搜索和提取土地利用变化样本中不同土地变化类型所对应的驱动力分类规则。分类规则的构建采用“IF…THEN”形式,并选取3种不同的适应度函数分别进行模拟验证。研究案例基于UCI实验数据集和美国纽卡斯尔市真实土地利用变化数据集。由实验结果可知,采用蜂群算法模型的总体精度和Kappa系数评价优于其它算法,表明蜂群算法应用于土地利用变化建模具有可行性。  相似文献   

射阳港工程潮位的推算和分析     

栾家友 《海岸工程》1997,(4)

利用射阳港站1986年7月至1995年5月的潮位资料，与附近的射阳河闸下站潮位进行相关分析，建立了射阳港站1972～1995年较为长期的潮位序列。以此推算出射阳港工程潮位。  相似文献   

胶东温泉地热水及温度与其他要素的相关分析     

栾光忠 《中国海洋大学学报(自然科学版)》1993,(Z1)

本文根据胶东地区14处温泉地热水中阴离子的组份和含量,将14处地热水划分为Ⅰ_1、Ⅰ_2、Ⅱ_1、Ⅱ_2 、Ⅲ型。经分析时比,笔者认为区内Ⅱ_1、Ⅱ_2型地热水提供的热量及开发潜力均大于其它类型。并且地热水的温度与其它要素之间存在着密切的相关性。这些相关性的分析在地热勘查及温泉开发等方面有着重要的意义。  相似文献   

关于矩阵方程A~TX+X~TA=B的极小范数解     

刘新国  栾绪国  李谌宽 《中国海洋大学学报(自然科学版)》2001,(6)

作者讨论矩阵方程 ATX+ XTA=B。该方程在 Hamilton力学研究中有用。首先利用L yapunov方程证明了极小 Frobenius范数解的存在性和惟一性。然后用奇异值分解给出了求解最小范数解的一种方法。最后讨论极小范数解的向前扰动分析和最佳向后扰动分析  相似文献   

琉球沟弧盆系的海底热流分布特征及冲绳海槽热演化的数值模拟   总被引：9，自引：0，他引：9  

栾锡武 《海洋与湖沼》1997,28(1):44-48

以１９９３－１９９５年对琉球沟弧盆系各个航次的热流数值进行了搜集整理，发现这一地区热流的分布特征和构造特征有明显的对应关系，大致上呈出现东西分带南北分块的分布特征，冲绳海槽有极高的热流值，而琉球海沟则有极低的热流值，这和板块的撞碰，俯冲，弧后扩张模式相吻合，用二维热传导平流议程用有限单元法对冲绳海槽进行的地球动力学热模拟显示，冲绳海槽的高热流值和海槽内的岩浆活动有着密切关系，如果不考虑海槽中岩浆因  相似文献   

潮间带垒石蒙网养鲍技术研究   总被引：1，自引：0，他引：1  

郭新堂  管相胜 《海洋湖沼通报》1997,(4):69-72

在潮间带进行垒石蒙网养鲍试验，４个岩礁区共设置１３６个石垛，放养壳长１．３￣３．０厘米的鲍５５．１万只，经１８个月养殖，共产商品鲍１９．２５４吨，平均亩产１３９７．８公斤，平均壳长６．８１厘米，成活率８９．６％，实现产值６９３．１４４万元，利润３５２．８１万元。该成果１９９６年被评为青岛市科技进步三等奖。  相似文献