扬子地块新元古代裂谷盆地莲沱组沉积分异及其物源分析

扬子地块莲沱组及相当地层单元的划分和对比,一直是我国南华系(即Cryogenian)研究关键难题之一.新元古代裂谷盆地开启早期,构造-沉积分异作用,同裂谷相变很大,使得盆地边缘区地层序列不完整.过分依赖岩石地层单元对比,历存分歧,典型的就是关于莲沱组与板溪群地层对比、时代归属以及莲沱组的沉积环境问题.本文通过对扬子地块...     

车载导航电子地图中语音提示应用与问题探讨

伴随着国家经济建设的飞速发展,我国城市建设也取得了长足的进步,交通网络四通八达,车载导航产品竞相上市,并成为解决定位服务的领先力量。作为车载导航的重要功能的路径规划与语音提示功能备受消费者关注。车载导航电子地图成为驾车出行不可或缺的辅助工具,尤其是车载导航电子地图的语音提示功能,已变得举足轻重,应用越来越广泛。本文主要就车载导航电子地图使用中语音提示问题进行探讨,并提出一些建议。     

近太湖新银鱼——银鱼移植新对象

近太湖新银鱼不仅在形态上与太湖新银鱼很相似,而且它们的个体大小、生长速度、食性等方面也十分相近。近几年在湖北地区的湖泊、水库相继发现了近太湖新银鱼,并在湖北省广水市徐家河水库成为优势种类,形成了较大生产规模。从目前研究的结果来看,近太湖新银鱼也是适宜我国湖泊、水库移植的银鱼种类。     

The Asymmetrical Eruption of a Quiescent Filament and Associated Halo CME

We will present detailed observations of the asymmetrical eruption of a large quiescent filament on 24 November 2002, which was followed by a two-ribbon flare, three coronal dimmings, endpoint brightenings, and a very fast halo-type coronal mass ejection (CME). Before the eruption, the filament lay along the main neutral line (MNL) underneath a single-arcade helmet streamer with a simple bipolar configuration. However, photospheric magnetic fields on both sides of the filament showed an asymmetrical distribution, and the filament and MNL were not located just at the center of the streamer base but were closer to the eastern leg of the streamer arcade. Therefore, instead of erupting along the streamer’s symmetrical axis, the filament showed a nonradial and asymmetrical eruption. It lifted from the eastern flank of the streamer arcade to impact the western leg directly, leading to an asymmetrical CME that expanded westward; eventually the streamer was disrupted significantly. Accordingly, the opposite-polarity coronal dimmings at both sides of the filament forming in the eruption also showed an asymmetrical area distribution. We thus assume that the streamer arcade could guide the filament at the early eruption phase but failed to restrain it later. Consistent with previous results, these observations suggest that the global background magnetic field can impose additional action on the initial eruption of the filament and CME, as well as the dimming configuration.     

STUDY OF RURAL TOURISM IN TURPAN, CHINA

~~STUDY OF RURAL TOURISM IN TURPAN ,CHINA@KEYIM Parhad$Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, P. R. China; The Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. ChinaBRAMWELL B, LANE B,…     

三峡工程及其邻近地区实测现今构造应力场

不少学者对三峡及其邻近区域的现今构造应力场用不同方法作过研究,但结论不一致。本文根据本区100多个地应力实测资料,分析了该地区的现今构造应力场,特别是最大水平主压应力方向的展布以及随深度的变化,认为本区现今构造应力场的最大主压应力方向为北西方向,应力值的量级属中等。     

秭归盆地东缘断裂构造觅踪——再论仙女山断裂带北延过长江问题

文章在概略介绍仙女山断裂带所处的大地构造位置、展布特征、组合关系基础上,用详实的材料,逐一分析了荒口—腰店子、腰店子—将军垭、将军垭—卜庄河及尹家湾—黄垭畔、黄垭畔—贾家店长江南北两岸各段的断裂构造形迹特征、力学性质和交切关系。认为仙女山断裂带已北延过长江,并建议对断裂的应力传递方式和可能出现的史前地震进行深入研究。     

On the role of buoyancy force in the ore genesis of SEDEX deposits: Example from Northern Australia

Finite element modeling on a highly conceptualized 2-D model of fluid flow and heat transport is un-dertaken to simulate the paleo-hydrological system as if the Mount Isa deposits were being formed in the Mount Isa basin, Northern Australia, and to evaluate the potential of buoyancy force in driving ba-sin-scale fluid flow for the formation of sedimentary-exhalative (SEDEX) deposits. Our numerical case studies indicate that buoyancy-driven fluid flow is controlled mainly by the fault penetration depth and i...     

厚壳贻贝（Mytilus coruscus）McNF-κB基因的克隆及其在发育中的作用

核因子κB（Nuclear Factor kappa-B,NF-κB）具有免疫、炎症、凋亡、细胞增殖和发育的调节作用,目前NF-κB在脊椎动物和果蝇中的研究较为丰富,在贝类中的报道较少。为进一步探究NF-κB在厚壳贻贝（Mytilus coruscus）免疫和发育中的作用,本研究克隆了厚壳贻贝McNF-κB基因的序列全长,其全长为4 087 bp,开放阅读框为2 613 bp,编码871个氨基酸,具有典型的锚蛋白重复序列（ankyrinrepeat, ANK）结构域和死亡结构域。氨基酸序列分析结果发现,该基因与欧洲贻贝（Mytilus edulis）和地中海贻贝（Mytilus galloprovincialis）分别具有72.76%和66.58%同源性,且在系统进化树中与欧洲贻贝和地中海贻贝聚为一支。经实时荧光定量PCR（qRT-PCR）技术检验表明,McNF-κB基因于厚壳贻贝各组织均有分布,在鳃中表达最高;McNF-κB基因在厚壳贻贝眼点幼虫阶段和稚贝阶段均有表达,且在稚贝阶段表达量显著高于眼点幼虫阶段。利用RNA干扰技术沉默眼点幼虫McNF-κB基因后幼虫变态率显著下降,推测McNF-κB基因调控厚壳贻贝幼虫变态过程。本研究为探究McNF-κB基因如何调控厚壳贻贝发育奠定了基础。