微细浸染型金矿床地质特征及其在河南的找矿方向

本文在对微细浸染型金矿床的地质及地球化学特征和成矿条件进行综合分析的基础上 ,对省内该类型金矿床的特点和成矿地质条件进行了分析和对比 ,指出了省内寻找该类型金矿床的找矿方向。     

宁阳县黑山头饰面用变粒角闪岩矿床地质特征及矿床成因

宁阳县黑山头饰面用变粒角闪岩矿床赋存在阜平期蒙山超单元龟蒙顶单元片麻状中粒含黑云花岗闪长岩和西官庄单元片麻状中粒含黑云角闪英云闪长岩中。矿体为新太古代五台期麻塔单元粗粒变角闪石岩,墨绿色,夹杂白色较大不规则条带,中粗粒变晶结构,块状构造。区内主要有1个矿体,呈岩脉状产出,倾角西陡东缓,矿体中间薄两端厚,连续性较好,属于岩浆型花岗岩矿床。     

复杂机场环境的多维动态可视化方法

针对飞行器可视导航中复杂机场空地环境多维要素动态交互可视化的难题,基于空地环境要素威胁语义统一的信息场模型,采用体绘制、面绘制与切片绘制混合的方法对机场近区域复杂多样的地形地貌、电磁和气象等威胁态势信息进行交互式动态可视化表达。以某机场的典型模拟数据为例,实现了威胁态势的动态交互可视化,验证了该方法的实用性和有效性。     

山东省重点地区矿产勘查开采遥感动态监测探析

为打击各类违法采矿行为,自2007年起山东省在全省基岩裸露区开展了多轮次矿产勘查开采遥感动态监测,及时发现了各类违法勘查开采矿产资源行为,为监测区矿产资源监管提供了执法依据。结合山东省矿产勘查开采遥感动态监测工作现状,探讨了矿产勘查开采遥感动态监测相关工作内容及要求。     

Identification and characterization of the Vibrio anguillarum prtV gene encoding a new metalloprotease

We cloned and sequenced a prtV-like gene from Vibrio anguillarum M3 strain. This prtV gene encodes a putative protein of 918 amino acids, and is highly homologous to the V. cholerae prtV gene. We found that a prtV insertion mutant strain displayed lower gelatinase activity on gelatin agar, lower protease activity against azocasein, and lower activity for four glycosidases. This prtV mutant strain also had increased activity for two esterases in its extracellular products, as analyzed by the API ZYM system. In addition, the prtV mutant strain exhibited decreased growth in turbot intestinal mucus and reduced hemolytic activity on turbot erythrocytes. Infection experiments showed that the LD₅₀ of the prtV mutant strain increased by at least 1 log compared to the wild-type in turbot fish. We propose that prtV plays an important role in the pathogenesis of V. anguillarum.     

ELEMENT COMPOSITION OF SARGASSUM THUNBEGII

ImODUcrIONSa~ll)lisalargegenerabelongingtothedassofFucales,Whosemembersaremorethan250.SargassumthunbopiiisthemostabundantwhdspedesintheYell0wScacoast,andisWdelydistributedalongtheentireChinacoastcyseng,1983).AlthoughsornestudiesonelemetSinseawtalshavebenTnadebyvariousauth0rspeanetal.,l995,Fanetal.,l996;Yamamotoetal.,l983,Whyte&Englar,l98O)theelementalcomPositioninseawedhasrareybenstudiedindetail.NeutronActivationAnalysis(NNA)isanidealmeth0dforinvestigatingtheelementalcompositioninmar…     

多用户环境下管理信息系统权限管理的一种新方法

提出一种多用户环境下权限管理的通用模型,对数据库的操作可分为录入、修改、查询3种基本操作,8种组合,由分配权限生成权限字符串,根据用户权限字符申在主菜单上分配操作权限,最后给出编程举例。     

基于SOA的GIS应用设计与实现

随着网络技术的快速发展,SOA作为构建企业级分布式软件系统的思想和方法学,已经得到了越来越广泛的应用.本文主要探讨了如何基于SOA技术实现传统的GIS应用系统.首先,我们介绍了SOA解决的GIS系统中模块复用的两大问题:封装和组合,以及现阶段还存在的问题,如海量数据和QoS等,接着简单介绍了当前SOA在GIS中的应用情景.最后,我们通过一个小型校园GIS服务应用实例PKUMAP,详细阐述了如何利用SOA的核心技术,如SCA,BPEL来构建GIS应用系统.     

Multi-band Solar Full-disk Extreme Ultraviolet Imager

Solar Extreme Ultraviolet (EUV) imaging observation is an important measure for the researches of solar activities and coronal plasma physics. But the traditional EUV imager and spectrograph can hardly achieve simultaneously the high spectral resolution and wide field-of-view of solar imaging. This paper has designed a new type of solar EUV multi-band imager, by adopting a kind of slitless grating and grazing incidence structure, it can realize the solar full-disk imaging of high spectral and spatial resolution. The field-of-view of the imager can be as broad as 47′. The spectral resolution is 2×10^?3nm per pixel, and the spatial resolution is 1.4′ per pixel. The temporal resolution of the solar full-disk is better than 60 s. The analysis of the solar full-disk spectral image and system response shows that the imager can observe the morphological evolutions of various solar activities, and can provide more comprehensive data for the researches of solar physics and space weather forecast.     

More than two hundred and fifty thousand spectroscopic binary or variable star candidates discovered by LAMOST

About 786.4 thousand stars were observed by LAMOST twice or more during the first stage of its spectroscopic survey. The radial velocity differences for about 256 thousand targets are larger than10 km s^-1 and they are possible spectroscopic binary or variable candidates(SBVCs). It is shown that most SBVCs are slightly metal poorer than the Sun. There are two peaks in the temperature distribution of SBVCs around 5760 K and 4870 K, while there are three peaks in the distribution of the gravitational acceleration at 2.461, 4.171 and 4.621 cm s^-2. The locations of SBVCs on the [Fe/H]-T, [Fe/H]-log g, log g-T and H-R diagrams are investigated. It is found that the detected SBVCs could be classified into four groups. The first group has higher log g～4.621 and lower T ～ 4870 K which are mainly cool red dwarf binaries. The second group of SBVCs has logg around 4.171 cm s^-2 that includes binaries and pulsating stars such as δSet and γ Dor variables. The gravitational accelerations of the third group of SBVCs are higher and some of them are below the zero-age main sequence. They may be contact binaries in which the primary components are losing energy to the secondaries in the common envelopes and are at a special stellar evolutionary stage.The last group is composed of giants or supergiants with log g around 2.461 cm s^-2 that may be evolved pulsating stars. One target(C134624.29+333921.2) is confirmed as an eclipsing binary with a period of 0.65 days. A preliminary analysis suggests that it is a detached binary with a mass ratio of 0.46. The primary fills its critical Roche lobe by about 89%, indicating that mass transfer will occur between the two components.