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distribution
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  分布
    A Study on the Geological Model of Oil Accumulation and the Distribution of Remaining Oil in Complex Fault Block
    复杂断块油藏地质模型与剩余油分布研究
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    Mesozoic Structure Framework and Its Controls on Accumulation and Distribution of Gold Deposits in the Northern Part of Yiwulü Mts., Western Liaoning Province
    辽西医巫闾山北段中生代构造格架及其对金矿形成富集与分布的控制作用
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    Distribution and Geological Significance of Sediment Color Reflectance in the Yellow Sea and the East China Sea
    黄海、东海沉积物颜色反射率分布及其地质意义
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    Accumulation and Distribution of Oil and Gas at Larger Depths in the Bohai Bay Basin
    渤海湾盆地深部层系油气成藏与分布规律研究
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    Study on the Fluvial Reservoir Architecture and Distribution Modes of Remaining Oil in Gudao Oil Field
    孤岛油田河流相储层结构与剩余油分布规律研究
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  分布规律
    Accumulation and Distribution of Oil and Gas at Larger Depths in the Bohai Bay Basin
    渤海湾盆地深部层系油气成藏与分布规律研究
短句来源
    Study on the Fluvial Reservoir Architecture and Distribution Modes of Remaining Oil in Gudao Oil Field
    孤岛油田河流相储层结构与剩余油分布规律研究
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    The Distribution and Environmental Significance of Redox Sensitive Elements in the Hypoxia Zone of the Changjiang Estuary and Its Contiguous Area
    长江口外缺氧区及其邻近海域氧化还原敏感性元素的分布规律及环境指示意义
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    Lithologic Reservoir Distribution Law and Target Prediction of Dongpu Depression
    东濮凹陷岩性油气藏分布规律及目标预测
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    DISTRIBUTION OF UNDERGROUND SEISMIC INTENSITY IN THE EPICENTRAL AREA OF THE 1976 TANGSHAN EARTHQUAKE
    1976年唐山地震地下工程震害的分布规律
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  分布特征
    A Study on the Organic Composition and Distribution in Surface Sediments from the Gulf of Mexico and South China Sea
    墨西哥湾—南海海底表层沉积物中有机质组成与分布特征研究
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    DISTRIBUTION CHARACTERISTICS AND MIGRATION REGULARITY OF STRONG AFTERSHOCK OF TANGSHAN EARTHQUAKE
    唐山地震强余震分布特征和迁移规律
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    GRAIN-SIZE DISTRIBUTION CHARACTERISTICS AND THE SEDIMENTARY ENVIRONMENT OF LOWER TERTIARY "T" BEDS FROM A CERTAIN AREA
    某地下第三系T层粒度分布特征及沉积环境
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    The Characteristics of the Time and Space Distribution of Some Macroscopic Phenomena in Shandong Province Before and After the Tangshan Earthquake of Magnitude 7.8
    唐山7.8级地震前后某些宏观现象在山东的时空分布特征
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    DISTRIBUTION CHARACTERISTICS OF THE QUALITY FACTOR Q AND THE AVERAGE STRESS DROP IN THE BEIJING-TIANJIN DISTRICT
    京津地区Q值及平均应力降的分布特征
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    COSMOGENIC NUCLIDES K~(40), Mn~(54) AND Co~(57) IN KIRIN METEORITES AND THEIR DEPTH DISTRIBUTION
    吉林陨石雨样品中宇宙成因核素Mn~(54)、Co~(57)和K~(40)的深度变化
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    DISCUSSION ON THE SOUTHEASTERN BOUNDARY OF THE ANCIENT SONGLIAO BASIN BASED UPON THE DISTRIBUTION OF THE CRETACEOUS SEDIMENTARIES
    从白垩系的分布论古松辽盆地的东南边界
短句来源
    THE DISTRIBUTION AND DEVELOPMENT CHARACTERISTICS OF SEDIMENTAL SYSTEM IN PARALIC LACUSTRINE BASINS IN EASTERN CHINA
    中国东部近海陆相湖盆沉积体系发育特征初探
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    EPR STUDY OF Mn~(2+) IN DOLOMITE AND ITS DISTRIBUTION
    白云石中Mn~(2+)及其占位的电子顺磁共振研究
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    SPATIAL DISTRIBUTION CHARACTERISTICS AND CONTROLLING FACTORS OF DIFFERENT TYPE GOLD DEPOSITS IN ZHAOYUAN-YE COUNTY GOLD DEPOSIT ZONE
    招—掖金矿带不同类型金矿的空间展布特点及其控制因素
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  distribution
The Diagonal Distribution for the Invariant Measure of a Unitary Type Symmetric Space
      
In this paper we compute the Fourier transform of the diagonal distribution for $\phi_{*}\mu,$ relative to a compatible triangular decomposition of G, the complexification of U.
      
Scales of quasi-norms are defined for the coefficients of the expansion that characterize, via Littlewood-Paley-Stein theory, when a radial distribution belongs to a Triebel-Lizorkin or Besov space.
      
Approximation of Distribution Spaces by Means of Kernel Operators
      
In this note we prove that the Wigner distribution of an f ∈ L2(?n) cannot be supported by a set of finite measure in ?2n unless f=0.
      
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Ⅰ. General SKETCH The Cenozoic basalt lavas are widely distributed along the coastal regionand its adjacent districts in eastern China. They form either widespread plateausor scattered mesa-like hills; and, in some places, the volcanic craters are stilladmirably preserved to-day. These basalt sheets were erupted extensively in lateTertiary and early Quaternary times. They belong to the multiple-vent basalts,but not the plateau basalt in the type of eruption. In this paper are given the results of a petrochemical...

Ⅰ. General SKETCH The Cenozoic basalt lavas are widely distributed along the coastal regionand its adjacent districts in eastern China. They form either widespread plateausor scattered mesa-like hills; and, in some places, the volcanic craters are stilladmirably preserved to-day. These basalt sheets were erupted extensively in lateTertiary and early Quaternary times. They belong to the multiple-vent basalts,but not the plateau basalt in the type of eruption. In this paper are given the results of a petrochemical study of the Ceno-zoic basalt in eastern China. Geological and petrographical studies of the basaltsare not described in detail. Judging from the chemical compositions, the mostoutstanding characteristic feature of the most basaltic rocks is the richness inalkalis, especially in K_2O, also the undersaturation in silica, and, therfore,the most of the basalts distinctly belong to the alkaline rock suite. Such chemicalcharacters are closely related to modal compositions. The general petrogra-phical characters of the basalt may be now as well described. In North Chinaand South Manchuria most basalts are trachy basalt and its allied types, andoccasional nepheline basalt. The constituent minerals of these basalt are cha-racterized by the presence of anorthoclase, potash-adesine, plagioclase, titanaugite,as well as by the abundance of olivine. In South China the main basalt is olivinebasalt, consisting of olivine, augite, and plagioclase as usual. At some placesthe basalt may be slightly silica saturated that the occasional presence of hyper-thene and quartz (xenocryst) is noteworthy. In North Manchuria the dominant basalt is leucite basalt, containing leucite and olivine as phenocryst and groundmass constituent. Xenocryst of quartz and feldspar grains are sometimes present.In Taiwan Province, basalt of Kuanyinshan volcano is of the tholeiite type,but, in some other districts, the alkaline basalt with feldspathoidal constituentalso occurs. In view of the above-mentioned facts, the petrographical difference seemsto be matched by the differences of the major tectonic forms of China. Thesefacts may be tabulated below: Geographical region Tectonic forms Basalt type 1. North Manchuria Granitized region in Varisclde Leucite basalt 2. North China & South Precambrian Sino-Korean Trachybasalt Manchuria massive 3. South China Huanan platform in Yenshanide Olivine basalt 4. Taiwan Himalayide Tholeiite basalt Ⅱ. Regional INVESTIGATION In Table 1 the chemical analyses of the Cenozoic volcanic rocks in easternChina published up to 1951 were collected, of which 74 analyses are basalticrocks. The available analyses of every basalt sheet are taken an average to re-present the regional composition of the basaltic rocks. The localities of the basaltsheets where the analyzed chemical data are referable are shown in Figure 1.In all, 21 localities of basalt are investigated. The average chemical compositionsof each basalt locality, together with the normative minerals, Niggli's valuesand Zavarickij's numbers are given in Tables 2 A and 2 B respectively (localnos. in Table 2 correspond to the numerous in circle in Figure 1). For theconvenience of comparison, the average chemical composition of some standardbasalts (after S. R. Nockolds, 1954), some alkaline basalt in New Zealand (afterW. N. Benson, 1944) and Uganda (after A. Holmes, 1937), and the world's ba-salts, together with the normative minerals, Niggli's values and Zavarickij'snumbers of our calculation, are selected and given in Tables 3A, 3B, 7A, 7Brespectively. As mentioned above, the chemical composition of eastern China basalt ischaracterized by the high content of alkalies, and especially the K_2O. This cha-racter is definitely revealed by the normative feldspar, which is given in Table2 A and graphically shown in Figure 2. From this graphical representation,it is recognized that the normative feldspar becomes increasingly enriched ormolecular from South China to North Manchuria. Although the projected points appear to be scattered, a trend of clustering of the normative feldspars in accor-dance with its geographical distribution is apparent upon close inspection. Inthe normative pyroxene diagram, Figure 3, it is shown that most basalts of easternChina are rich in Wo molecular, falling near the Di-Hd line; On the otherhand, those of Kuanyinshan basalts of Taiwan Province are poor in Wo andcluster in the central part of the Di-Hd-Fs-En field. Therefore, that the easternChina basalt, excluding that of Kuanyinshan, belong to the alkaline rock suiteis justified. The comparison diagrams of qz, al-alk, C-(al-alk) and K-mg ofNiggli's values, based on the data given in Tables 2 B, 3 B, and 7 B, are gra-phically shown in Figs. 4, 5, 6 and 7 respectively. As will be seen from thesefigures, in general, the qz and al-alk of Niggli's value are lower, but C-(al-alk) and K-mg are higher than those of some common basalts. Fig. 8 isZavorickij's petrochemical vector diagram, from which the petrochemical cha-racters of high alkaline property in eastern China basalts are clearly justified. Ⅲ. Serial COMPARISON For ascertaining and understanding the general chemical characters, theCenozoic eastern China basalt and its differentiated associations are divided,based on the SiO_2 content, into 5 chemical types, the average composition ofwhich is given in Table 5A. As the chemical composition of Kuanyinshanvolcanic rocks in Taiwan Province shows a distinct calc-alkaline affinity, it is,therefore, dealt with the same procedure as well. The average chemical compo-sition of the volcanic rocks is given in Table 5 B. Since the Cenozoic basalt ineastern China covers the region adjacent to the Circum-Japan Sea and the Ja-panese Archipelagoes which are well known by the occurrence of alkaline andcalc-alkaline rock suite respectively. The serial variation in the chemical com-position of eastern China volcanic rocks is examinated in comparing them withthose of the Circum-Japan Sea and the Japanese volcanic rocks. The data usedfor the Circum-Japan Sea and Japanese rocks, which are given in Tables 6 A and6 B, are based on Tomita's and Yamada's calculated results respectively. Zavaric-kij's number of the same rocks, based on Zavarickij's data, is given in Table6 C. Following various petrochemical methods, some graphic diagrams are cons-tructed in order to express the chemical characters of the rock series of easternChina more definitely. The difference in chemical composition as comparedwith the Circum-Japan Sea alkaline rock suite is shown in the normal varia-tion diagram Figure 9. Other petrochemical indices (proposed by Peacock, Hol- mes and Tomita respectively) obtained are summarized below: Ⅰ Ⅱ Ⅲ Ⅳ alkali-lime index (Fig. 10) 65.5 59.0 63.0 52.0 alkali-alumina index (Fig. 11) -- -- 67.8 63.3 Ol-Q index (Fig. 12) 20.0 43.0 72.5 76.5 Ne-Hy index (Fig. 13) -- -- 55.0 59.9 Di-C index (Fig. 14) 46.5 46.5 -- -- Ⅰ. Japanese volcanic rocks; Ⅱ. Taiwan volcanic rocks; Ⅲ. Circum-Japan Sea alkaline suite; Ⅳ. eastern China volcanic rocks.From these graphical solutions in Figs. 10-14, it may be justified that thevolcanic rocks in eastern Asia have increasingly enriched the alkali contentfrom the Japanese Archipelagoes to the mainland of China. Figure 15 is avariation diagram of the normative feldspar of the eastern China series, incomparison with that of the Circum-Japan Sea region, the Japanese Archipela-goes and New Zealand. As will be seen from the diagram, the variation of thenormative feldspar of eastern China rock series is quite discriminative. Notonly is it richer in or molecular, but the positions of point N and O (corres-pond to the respective Ol-Q and Ne-Hy indices as shown in Figs. 12 and 13)of the eastern China series are also in a later course than the others. Figure 16is a paragenetic diagram of the normative plagioclase and pyroxlene of theeastern China series. In the variation diagram of the normative pyroxene, Fig.17, the distinct difference in the course of variation between the alkaline andcalc-alkaline series is clearly revealed. In this connection, the directon of varia-tion in the normative pyroxene of the alkaline series differs from that of thecalc-alkaline series. It is also notable that the range of variation in the easternChina series is smaller, due to the presence of higher Wo molecular in bothbasic and acidic types, as compared with that of the Circum-Japan Sea series.Figure 18 is Zavarickij's petrochemical vector diagram of the eastern Chinaseries compared with that of Circum-Japan Sea and Japanese series. It may be acomplemental diagram of the serial comparison diagram of eastern Asia volcanicrock series, prepared by Zavarickij (cf. A. N. Zavarickij's Introduction to Petro-chemistry of Igneous Rocks, 1950, Fig. 61, p. 205, in Russian). The distinctdifference of these rock series may be clearly observed in the graphical solution.In Table 7 A is given the average chemical composition of eastern China basalt,together with the composition of basaltic rocks of the world (including olvinebasalt and Toleiite, Ocean basalt and Continent basalt) for comparison. Theeastern China average is very similar to the average composition of the olivine- basalt of the Circum-Japan Sea region (based on Tomita, 1935, and recalculatedby the writer), while it differed more or less from that of any of the world'sbasalts by the high content of alkali and especially K_20. This character isdefinitely revealed by the normative feldspar and pyroxene, which are graphi-cally shown in Figs. 19 and 21 respectively. Figure 20 is Zavarickij's petroche-mical diagram of the world's basalt. As shown in these diagrams, it suggests atransitional relation rather than a sharp cleft in the petrochemical charactersof the world's basalts. There are no distinct types of basalt magma but rathera continuous series from silica saturated (tholeiitic) to silica-undersaturated(olivine-basalt) rock, although the chemical distinction may be too subtle to beread directly from chemical analyses. Ⅳ. ORIGINAL Basalt Magma The original magma of eastern China basalt belongs to the olivine basaltmagma type. In this discussion it is assumed that the primary olivine basaltmagma is melted from a crust of peridotitic crystalline rock in the upper partof the sima layer. Olivine basalt magma may be modified by the gain of alimited amount of silica and some alkalies to produce a derived melt, whichappears to coincide with the tholeiitic

~~

Maps purporting to show the distribution of seismicity are generally based on histroical data or results of instrumental seismology or both and sometimes associated with the geological evidence that may account for the cause of earthquake. The present work was based on a large body of materials. For the historical data, we have traced back to three thousand years. In Chinese historical anuals as well as other literary works, there is a wealth of informations on earthquakes in ancient China. It is a formidable...

Maps purporting to show the distribution of seismicity are generally based on histroical data or results of instrumental seismology or both and sometimes associated with the geological evidence that may account for the cause of earthquake. The present work was based on a large body of materials. For the historical data, we have traced back to three thousand years. In Chinese historical anuals as well as other literary works, there is a wealth of informations on earthquakes in ancient China. It is a formidable task to look over thousands of volumes page by page, but it has been eompleted by The Third Institute of History, Academia Sinica.

为国家工業建設地点提供地震参考資料,和全国地震危險地区的划分,是中国科学院地球物理研究所解放以来重点工作之一,承各方面的协助,笔者和徐煜坚等九人在苏联顧問帮助下編成了我国的“全国地震区域划分圖”。現在提出,作簡单的說明,請讀者提意見,以便作进一步的修正。

The problem of primary importance in the study of reflection or refraction seismograms is to recognize effective impulse on the records. If a single seismometer were utilized to determine movement of the ground following a shot, it would generally be quite difficult to distinguish with surety the effective waves from spurious energies recorded on the seismogram. In seismic prospecting, the visual identification of effective waves is made possible by the method of simultaneously recording the motion of ground...

The problem of primary importance in the study of reflection or refraction seismograms is to recognize effective impulse on the records. If a single seismometer were utilized to determine movement of the ground following a shot, it would generally be quite difficult to distinguish with surety the effective waves from spurious energies recorded on the seismogram. In seismic prospecting, the visual identification of effective waves is made possible by the method of simultaneously recording the motion of ground by using as many as 20 to 60 separate detecting seismometers on the same record. The alignment of the impulsive forms across the seismogram is usually referred to as "line-up" or "cophasal-axis" of seismic signal. By using the general probability distribution function of Rayleigh and assuming that seismic waves, are of the Ricker wavelet form, the problem of determining how far random noise statistically limits the detection of seismic cophasal axis in seismogram is studied. The idea that determination of signals of minimum detectable signal—threshold and the dependence of signal threshold on some kinds of parameters was discussed in detail. It may be of interest to mention that signal threshold may be controlled by such interference systems as multiple seismometers, pattern shooting, mixing circuits and magnetic head combination method in reproduction.

在地震勘探中,有效地震波是在干扰背景上进行記录的,在記录上識別有效波一直是地震勘探的基本問題。本文中,我們假定地震脉冲是雷克对称形式的波漣,用随机过程分析法,討論了地震脉冲在平稳正态分布随机干扰影响下的幅度和相角分布函数及其它主要的統計特点,并指出地震脉冲波同相軸能够予以識别的条件,同相軸的可靠程度,能够予以識別的同相軸对应要求的最少地震脉冲波瞬时强度——門限值,并分析了用組合方法控制門限值的方法。

 
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