earth-based 中文意思是什麼

The astronomical time scale based on the earth s rotation is another common time scale

根據地球自轉而釐定的天文時標是另一常用時標。

The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment. during the past two decade, the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants, provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants. three new plant based epochs have been recognized. on the other hand, molecular sequence studies have provided insights into the phylogeny and early branches of land plants. a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences. this paper summarizes recent advances and new knowledges, comments on the phylogenetic studies based on the cladistic analysis

陸生植物的起源和演化是地球生命中的重大事件，它影響到地球上所有的其他生命和全球環境。在過去的20年中，從中奧陶世歷經整個志留紀至早泥盆世的巖層中，化石植物微化石和大化石的新發現改變了人們對陸生植物起源的認識，並且為陸生植物和維管植物早期演化分異提供了基部類群分化的時間框架。據此人們識別出地史中的3個陸生植物的時代：始胚植物時代始維管植物時代和真維管植物時代。

Based on xi ' an region meteorologic measurement relative humidity and temperature profile data in cloud cover, the log - amplitude scintillation deviation a, calculated in terms of the cn2 model compare with values predicted by means of ortgies model at 10 ~ 30ghz. it is shown that the c, 2 model can be applied at the continental climate area as xi ' an area. finally, on earth - space paths, by applying a modif

根據西安地區氣象觀測有雲覆蓋時溫度和濕度隨高度變化的數據，在10 30ghz ，應用該c _ n ~ 2模型計算了幅度閃爍標準偏差，也與ortgies模型預測值做了比較；表明該c _ n ~ 2模型是可用於象西安這樣的大陸型氣候地區。

Based on an analysis of geochemical characteristics of rocks and trace elements as well as rare earth elements, this paper holds that they are products of crystallization differentiation of the same magma, that the major ore resource of this area is copper, and that gabbro - diabase is the main ore - bearing horizon

通過對巖石化學特徵和微量元素、稀土元素地球化學特徵的剖析，表明其是同一巖漿結晶分異的產物，本區主要礦產應為銅，輝長輝綠巖是主要的含礦層位。

Based on field research and the dynamic analysis of remote sensing data of different time ( 1987 tm, 1996 tm and 2000 china - brazil earth resource satellite ccd ), using multi - information of research area ( including data of geology, geography, hydrology, meteorology, economy, human culture and dem ) and existing research results, the dissertation discusses drive factors of desertification and the relationships between drive factors and desertification with the help of gis tool and some mathematical methods such as probability, statistics, curvilinear estimation, logical analysis and analytic hierarchy process

論文在對研究區土地荒漠化現狀野外調研和不同時相（ 1987tm 、 1996tm和2000ccd ）遙感圖像土地荒漠化信息提取和演變分析的基礎上，結合研究區已有的多元信息基礎資料及研究成果（包括地質、地理、多時期的水文氣象、經濟、人文以及dem數據等） ，運用gis強大的空間分析功能和概率統計、曲線估計、邏輯分析、主成分分析、層次分析等數學方法綜合研究了土地荒漠化與各驅動因子之間的相關關系，揭示了研究區土地荒漠化的主要驅動因素，探討了荒漠化動態演化規律。

Although tachyons have never been seen in earth-based laboratories, mathematically they can exist.

盡管在地面的實驗室中，從來沒有發現過超光子，但從數學上說，它是可能存在的。

Based on the petrological, petrochemical and geochemical analyses about these rocks, it is concluded in this paper that the xenoliths were originated from the upper mantle, and comprised of both primitive pyrolite and the infusible solid residual of the upper pyrolite while the basaltic magma was melted out of it, which were brought up to the earth ' s surface via o1carnc eruption

根據其巖石學、巖石化學及地球化學特徵分析，包體來源於上地幔，其成因既有原始地幔巖，亦有上地幔巖經部分熔融出玄武巖漿后的難熔固相殘留物，被火山噴發攜帶至地表。

Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources

基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。

Earth - based interferometer

地面干涉儀

The whole data receiving and alerting system of fy - 2 consists of three systems : the earth - based system of data receiving and demodulating, the system of data processing and alerting

Fy - 2衛星的空間環境數據接收及警報系統由2大系統組成：地基數據接收及解調系統、數據處理及警報系統。

At first, environment detection data is collected, modulated and emitted in the the system of fy - 2 and detectors. then data signal is magnified, demodulated and sent in the earth - based system of data receiving and demodulating. at last, data is received, processed, stored, displayed and judged to make alarm automatically by telephone for solar proton - events and x - ray flare in the system of data processing and alerting

首先在fy - 2衛星及探測器系統中，環境探測數據被收集、調制並發射，接著由地基數據接收及解調系統將數據信號放大、解調還原並發送，最後由數據處理及警報系統將數據接收處理、保存顯示並對太陽質子事件、 x耀斑進行自動電話報警。

It is impossible to look for life on another planet using earth - based telescopes

使用放置在地球上的望遠鏡是無法觀察到其他行星的生命的。

Radar observations using earth - based radio telescopes have pierced those clouds and suggest the presence of lakes composed of liquid hydrocarbons

利用地球表面無線電波望遠鏡所做的雷達觀測，可穿透這些霾霧，看見可能是由液態碳氫化合物組成的湖泊。

We will depend on the high technology to research and develop the power resource of the new permanent magnetic rare - earth - based mechanism and get a first - rate series of magnetic machinery engineering products, which will become our start point

我們將依託高科技，研究開發基於稀土永磁的新型機構的動力源，獲得一流的磁機械工程系列產品，這就是我們的出發點。

Digital watershed was epitome of digital earth, based on elementary theory of digital earth and many years " work foundation of the watershed, stemming from watershed informationalization construction, function, structure, system, configuration, development stages were conceived. meanwhile, technological means of theory and fulfillment of digital watershed construction from many facets such as main frames, data types, constitution and structures were explored preliminarily

根據數字地球的基本理論，以流域多年來的工作基礎為前提，從流域信息化建設出發對數字流域的功能結構、體系結構、發展階段等進行了設想，並從總體框架、數據類型、組成結構等方面對數字流域構建的技術方法進行理論和實踐上的初步探索。

Research progress of rapid quenching and annealing of rare earth - based hydrogen storage alloys

稀土系貯氫合金的快淬及退火研究進展

Modern navigators normally are not affected by the wandering of the poles because they can regularly determine their position from satellites and earth - based observatories

現代導航器一般不會受到磁極漂移的影響，這是因為它們能從衛星和地面天文臺有規律地確定自己的位置。

Study on rare - earth - based low co ab5 hydrogen stora ge alloy

低鈷型稀土基貯氫合金的研究

This dissertation established a novel distributed spaceborne sar simulation system based on the high level architecture ( hla ). this dissertation developed a mathematical model of instantaneous sphere earth model and instantaneous circle orbit model for the geometry system between the satellite platform and the targets on earth based on the satellite platform ’ s orbit features and sar system ’ s operational characteristics, unlike the traditional sphere earth model and circle orbit model

本文從建立精確的、易於模擬的星地幾何關系入手，舍棄了傳統的星載sar研究中的球型地球模型和圓形軌道模型，根據星載sar的軌道特點和sar的工作特點，對局部球型地球模型進行改進，建立了在瞬時球型地球模型和瞬時圓形軌道模型下的星載sar模擬。

Thus restrict the course of gis socialization and block the development of " digital earth ". based on open gis consortium ' s open gis criterion and combined the development of computer technologies, this paper studies the webgis developing model deeply, then brings forward a new developing model and puts it into practice

本文著眼于現有webgis系統的缺陷，根據ogc制定的開放式gis標準，結合計算機技術的發展，對webgis系統的設計與開發作了較為深入的研究，設計了一種基於j2ee和gml的系統模型並付諸于實踐。