k-a age 中文意思是什麼

k-a age 解釋
鉀-氬年齡
  • k : （pl Ks K s; ks k s ）1 英語字母表第十一字母。2 K字形物體[記號]。3 一個序列中的第十一〈若 J 略去...
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  • age : n 1 年齡。2 成年〈滿廿一歲〉。3 老年，晚年。4 壽命；終生，一生。5 時代，時期，年代。6 〈口語〉很...
  1. K - ar age of an illite from alteration rock in the contact zone around lianhuashan porphyry is 38. 6ma. with referencing to the main metallogenic period of yulong copper metallogenic zone and of ailaoshan gold metallogenic zone, it is suggested that the time of formation of deposits in the district studied is probably in a period of time from 38. 6ma at earliest to 20ma at latest. this time is equivalent to the origination time of two important tectonic events, i. e., lanping movement and the turning point when ailaoshan - red river fault turned from sinisteral into dextral

    獲得了蓮花山巖體周圍接觸帶蝕變巖中伊利石k - ar年齡38 . 6ma ，參考玉龍銅礦帶和哀牢山金礦帶的主要成礦期（分別為30ma左右及26ma ） ，釐定本礦集區成礦年齡下限為38 . 6ma ，上限為20ma ，與兩次重要的構造事件?蘭坪運動的起始時間及哀牢山?紅河斷裂由左旋轉為右旋的時間相當。
  2. K - ar age dating method is facing a serious challenge to its application due to that both ar loss and ar excess are widespread found even though it has been undergoing 50 years. in the latest few years of the 20th century, studies on k - ar geochronology have been pushing on a new step as a sign of method perfected and precision enhanced. high precision and high resolution

    Ar定年方法的完善和精度的提高為標志，把k - ar年代學研究推向了一個新高度。微區微量高精度高分辨定年，把定年時限擴展到人類歷史范疇，精細的分析技術拓寬了年代學的應用范圍，使之解決的地質問題更廣泛。
  3. Alkylammonium cations method is a new way to study the diagenetic age of sedimentary rocks. alkylammonium cations can replace k cations in mica and illite stoichiometrically

    Iaa法和烷基胺陽離子取代法進行伊利石分離和定年是目前國際上最先進的礦物定年方法。
  4. Such integra ting feature vector is used for building k dim e nsion gaussian m odel, whose param e ters are estim ated by an expectation - m a xi m i zation ( em ) algorithm, and then the resulting block - cluster m e mberships provide a segm entation of th e im age. after segm ented, a m e thod of param e ter - trimm e d average for describing re gion is proposed, of which the param e ter is decided by area and position of region dire ctly. the sim ilarity m easure between two im ages is defined by integrating properties of all regions in the im age

    文中先將圖像分成4 4小塊，各塊的顏色、紋理、位置特徵構成8維的特徵空間；在該空間中對得到的8維特徵矢量建立一個k維高斯模型，應用期望最大em演算法估計模型參數，產生的塊特徵-聚類隸屬度函數實現對圖像的分割；為減小分割演算法不確定性對檢索效果的不良影響，對得到的區域採用參數均衡平均特徵表示，其中參數的確定直接與區域的面積、位置有關。
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