共查询到19条相似文献，搜索用时 187 毫秒
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古生物物种分异度计算和绘图的计算机化 总被引：10，自引：2，他引：8
本文采用ＢＡＳＩＣ程序,方便、快捷、准确地绘制出了物种分异度图,并与其它应用软件资源共享,绘制出的图件显得整洁、美观,充分显示了计算机技术的优越性 相似文献
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微X射线束荧光扫描成份分析研究：元素二维分布图 总被引：4，自引：0，他引：4
经过改进的微X射线扫描分析装置,扩大了测量范围;提高了位移精度;处理数据及绘制二维(平面)元素分布图实现计算机化。测量并绘制出大洋锰结核中多元素平面分布图。 相似文献
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基于可视化程序设计思想,用BorlandDelphi4编程实现了直方图的组数选择与绘制。程序能够绘制出[5,25]区间内各组数的原始或对数数据频率分布直方图图形,从而使用户能够直观地根据图形选择合适的直方图分组。程序界面友好、使用方便。 相似文献
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目前,绘图软件所绘制的岩性剖面图中,将所有岩性框架均用矩形来表示。对于陆源碎屑岩来说,这样既不能表示出其粒度变化情况,又不能反映出它形成时的沉积动力学特征。为了弥补绘图软件的这些不足,提出用曲边矩形代替矩形来绘制陆源碎屑岩岩性框架,并以表示正粒序陆源碎屑岩岩性框架的曲边矩形为例,详细推导了其曲边的函数表达式,为绘图软件的二次开发提供了陆源碎屑岩岩性框架绘制的一种数学模型。 相似文献
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刘心季 《物探化探计算技术》1986,(4)
对遥感图象的立体观察和分析是遥感图象解译的重要手段之一,也是多种数据综合处理的重要方法之一。本文介绍了用计算机绘制彩色立体图的基本原理、方法和立体效果。使用I~2S/101图象处理系统,对长江三峡巴东县附近的航片和地形图资料进行数字化、配准、平滑和增强,绘制出不同视角的立体图,并模拟绘制不同水位的立体图,取得了较好的效果,十分有助于图象解译人员认识和捕助感兴趣的地貌景观特征。它的成功,证明了直接利用地形图和平面图象绘制立体图的可行性,为多种数据的综合处理打开了新的途径。 相似文献
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观测场地磁场梯度测量结果最直观的表述方式就是利用ΔF值绘制出的场地地磁场分布等值线图。Winsurf软件是Golden公司开发的一个三维绘图软件包 ,可以绘制各种等值线图和三维立体图。目前最高版本为 8.0。本文较为详细地介绍了利用这个软件的应用方法、步骤。 相似文献
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本文根据大量史料考证出《永乐大典》所辑的“潮州城图”,是元、明之际以宋代绘制的“潮州城图”为底本的摹绘图。其底本绘制于宋端平年间(1234—1235),绘制人可能是《潮州图经》(1235年)的作者黄梦锡等人。原图已佚。文中还考证了该图中部分自然地理和人文地理的分布以及建置情况。 相似文献
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Trace elements in galena and sphalerite and their geochemical significance in distinguishing the genetic types of Pb-Zn ore deposits 总被引：3，自引：0，他引：3
Zhang Qian 《中国地球化学学报》1987,6(2):177-190
This paper deals with the trace elements Ag, Sb, Bi in galens and Fe, Mn, Cd, Se, Te, Ga and In in sphalerite from 60 Pb-Zn
deposits in China and other countries. The contents of the selected trace elements and their ratios show regular variations
from one type of Pb-Zn deposits to another. These elements or their ratios are plotted onto Pb-lnAg, lnSb-lnBi, lnGa-lnIn,
Fe-Cd, Fe-Cd-Mn and Zn/Cd-Se/Te-Ga/In diagrams. On the basis of these diagrams, the deposits associated with magmatism(type
I), those associated with volcanism(type II), the sedimentary-reformed deposits (type III) and sedimentary-metamorphic deposits(type
IV) can be well distinguished. Types I and III have the definite fields in all the diagrams. Types II and IV also have their
own fields in lnGa-lnIn and Zn/Cd-Se/Te-Ga/In diagrams. The author considers that these diagrams are applicable to distinguishing
the genetic types of Pb-Zn deposits. 相似文献
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A contribution to the theory of variation diagrams 总被引：9，自引：0，他引：9
T. H. Pearce 《Contributions to Mineralogy and Petrology》1968,19(2):142-157
Harker diagrams and other ternary weight per-cent diagrams distort genetic trends by changing their slopes. They can not be readily used to discriminate between rival hypotheses. Two theorems have been proven which show the desirability of using certain types of ratios, instead of per-cent values, for comparisons. It is suggested that, when it is desired to discriminate between rival hypotheses, or to determine the exact variation between components, weight per-cent comparisons be discontinued (wherever possible) in favour of molar ratio comparisons in which one of the components (the divisor) is a constant. Variation diagrams of this type offer reliable discrimination between rival hypotheses, and yield the true relationship between variables in every case. An example involving crystal fractionation of olivine and pyroxene from a basic sill is developed in detail, and other potential uses are mentioned. This technique is completely general and is not restricted to chemical components, or to any scale of system, or to any field of study, providing certain essential conditions are fulfilled. 相似文献
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The relation between amplitude-periodband (APB) diagrams and Fourier spectra of teleseismic P and S waves was analyzed using displacement-proportional signals derived from magnetic tape records of the feedback-controlled broadband velocigraph operating at the KHC seismic station. Most Fourier spectra and all the APB diagrams of the wave groups investigated exhibit a more or less pronounced maximum and do not correspond to the shape of theoretical far-field spectra for the Brune model. Contrary to Fourier spectra, APB diagrams have an unambiguously defined level and are not influenced by truncation, incorrect zero level and other disturbing effects. 相似文献
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本文从实践和理论两方面讨论了应用构造地球化学图解分辨玄武质岩石产出的大地构造环境这一方法所存在的问题,认为J. A. Pearce等给出的构造地球化学图解,在很大程度上,是一种岩性分辨图解,图解分辨中存在不确定性的根本原因是控制玄武质岩石形成的条件参数与构造环境并不完全存在一一对应的映射关系,应用图解应持谨慎态度。 相似文献
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R. PASSEGA 《Sedimentology》1977,24(5):723-733
CM grain-size diagrams of clastic deposits were introduced in 1957. Since that time a large number of diagrams representing most environments were constructed. Discussions of parameters C and M by the writer and by others showed that these parameters are indicators of hydraulic conditions under which sediments were deposited. In a 1975 paper Vandenberghe discussed the CM diagram of the Boom Clay, Belgium, and excluded that CM diagrams gave indications on the mechanism of sediment deposition. In order to answer Vandenberghe's assertions, the writer systematically compared the numerous CM diagrams representing suspension deposits with the characteristics of the environments. Result of this comparison is that CM diagrams give coherent indications on deposition which agree with the known environment characteristics. The Boom Clay diagram is no exception. Another result of the present study is that, in environments as a whole, two types of currents can be recognized, distinguished by the relation between bottom turbulence and grain-size of sediment in suspension. Deposits of these two current types and distribution of bottom turbulence are indicated by CM diagrams. Characteristics of these currents vary with the environment and help the reconstruction of ancient environments. Information given by CM diagrams has limits and should be integrated with other evidence on the environment. However, contrarily to the information given by ecology or sedimentary structures, the evidence provided by grain-size has the advantage of being universal, as it can be obtained in all clastic deposits. This evidence therefore is a means for comparing and classifying clastic deposits as a whole. 相似文献
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对南堡凹陷馆陶组(粉)砂岩的主量、微量及稀土元素的地球化学特征研究表明：多数主量元素含量中等,SiO2、Al2O3等主元素含量及其相关比值反映大多数砂岩属于岩屑砂岩和长石砂岩,个别为杂砂岩;镁铁族元素(Co,Cr,Ni,Sc,V)和大离子亲石元素(Rb,Cs,Ba,Sr)含量类似于上地壳。砂岩十分相似的REE分布模式显示了相似的物源和构造背景。SiO2-K2O/Na2O图解、主元素双变量判别图解及Th-Sc-Zr/10和Th-Co-Zr/10等构造背景判别图解均表明,馆陶组物源区属于活动大陆边缘构造背景。根据主元素物源判别方程图、La/Sc-Co/Th和Th-Hf-Co图投影及(Gd/Yb)N值,表明馆陶组物源主要来自由长英质岩石组成的后太古宙上陆壳。通过与燕山地区不同时代(期)中酸性火山岩和花岗岩REE的对比,表明母岩主要来自燕山褶皱带地区于燕山期发育的中酸性火山岩和/或花岗岩体。 相似文献
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The color indices of the Sun in the u vby system are calculated using the spectral energy distribution of Lockwood, Tug, and White. This allows errors in the absolute calibration to be excluded from the calculated color indices. The normal position of the Sun on the (v-b)?(b-y) and (v-y)?(b-y) color-color diagrams for early G stars testifies to the absence of any significant peculiarities in the Sun compared to other stars of similar spectral type. These diagrams can provide a useful tool in searches for candidate solar analogues among faint stars. 相似文献
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It is shown that a hypothetical relict magnetic field in the solar radiative-transport zone that penetrates into the convective
zone would affect the solar dynamo, resulting in radical changes in the butterfly diagrams. This would transform the traveling
waves of activity into standing waves. A comparison of our results with the well-known butterfly diagrams for the Sun gives
an upper limit of the order of some tens G for the value of relict magnetic field penetrating into the solar convective zone.
At the same time, it is not ruled out that such relict magnetic fields in other solar-type stars are strong enough to make
the activity waves become standing waves. 相似文献
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首先介绍了两种简易岩石地球化学图解，即元素，元素对比值混合方程和混染岩，混染端员元素浓度差相关性图解。进而应用这两种图解配合其它地质事实共同验证了冀东迁西上营－十八盘地区的云英闪长质片麻岩是由奥长花岩是由奥长花岗岩浆对角闪质岩石不同程度同化，混染形成的。 相似文献