無定形巖 的英文怎麼說
中文拼音 [wúdìngxíngyán]
無定形巖
英文
amorphous body-
The volcanic rock age and the age of the qiangtang formation determined the wudaoliang group between 20 - 5ma, discovering a flood of spore and pollen with ostracods fossils ( regard eucypris as principle ), which are miocene epoches typical numerator, therefore wudaoliang group accumulate in miocene epoch is doubtless ; 9 - 2ma are the age of the suonahu formation based on the data of the esr, which were characteristic of later period in miocene epoch - pliocene epoch, spore and pollen with fossil all were miocene epoch period
由火山巖和覆于其上的羌塘組的年齡限定五道梁群的沉積時間為20 - 5ma ，五道梁群中發現大量的孢粉和介形蟲化石（以eucypris為主） ，分析認為它們都是中新世時期的典型分子，因此五道梁群的沉積時間為中新世是無疑的；嗩吶湖組的esr測年數據范圍為9 - 2ma ，代表中新世晚期?上新世時期，孢粉和化石都具有中新世時期的特徵。Where good natural protection is not available a fixed hanger or ringbolt should replace the piton
若該處並無良好的天然支點，則應以固定耳片或環形錨栓取代該巖釘。The acidic liquid related to decomposition of organic mater during hydrocarbon enrichment in the late diagenesis, and m eteoric - waters during epidiagenesis, had resulted in dissolution of detrital feldspars and carbonate cements, which contributed a better retention of reservoir quality for the sandstones
溶蝕作用是砂巖物性改善的主要原因，尤其是晚期成巖階段，在富含有機酸和無機酸酸性孔隙流體的作用下形成一定量的次生溶蝕孔，使儲層砂巖物性得到一定改善；在表生成巖階段，由於大氣降水的介入，儲層物性再次得以改善。The fractal is a geometrical figure with self - similar symmetry, and it is an important tool for characterizing irregular structures in nature that are self - similar on certain length scales. for example, the koch curves can be viewed as a mathematical model for coastlines, percolation model can be used to mimic mixture of mental and insulator, self - avoiding walks can serve as a model for linear polymers, and rock fracture mode can stimulate the process of brittle fracture of rock, and so on
分形是具有自相似對稱性的幾何圖形，可用來模擬自然界中在一定尺度范圍內具有自相似對稱性的不規則結構，如koch曲線可用來模擬海岸線，滲流模型可模擬金屬絕緣體混合物，自迴避無規行走模型可模擬線性聚合物，巖裂模型可模擬真實巖體的脆性破裂等。At the meantime, the rock mass may alternate between loading and unloading and it exists in certain kind of liquid, such as surface water, unconfined water, confined water etc for its intrinsic crannies. the practical rock mass concerned project must solve the key stability pr oblem after the understanding of the complicated mechanical characteristic and the deformation trends to guide the following project design and construction for the demand of security, economy, feasibility and validity. however, the intrinsic nonlinearness and complexity of the engineering rock mass become the main difficulty to predict the stability and deformation, the corresponding structure design must ensure enough safety with all the determinate or random force combination, so a model without the geometry distortion and constitutive equation warp is necessary to be built for the quantificational analysis of practical structure ' s stress, for the simulation of the real process and for the determinate evaluation system and optimization
由於實際工程巖體其固有的非線性和復雜性，使得求解對應的諸如其穩定性、變形等問題面臨較大的困難，而有關的工程結構的設計必須保證該結構在外來因素的作用下具有足夠的安全度、經濟性和合理性，這必然要求對巖體及其工程結構的受力與變形有一套量化評判體系和優化技術，抓住實際工程問題的本質特徵並建立可行的符合幾何模擬、本構模擬、受力模擬、過程模擬四原則的求解模型，通過該模型的數值模擬成果來指導巖體工程的設計、施工及運營、管理；而巖體結構面的存在使得基於傳統連續介質力學理論的理論分析和數值模擬面臨巨大的挑戰，物理模擬的試驗周期和成本也大大增加，而巖土體工程問題則成為典型的數據有限、了解程度有限類問題，這類問題的解決需要綜合應用理論分析、經驗判斷、物理模擬和數值模擬等方法，數值模擬可以完成目前許多技術手段無法完成的實驗，如參數控制，復雜條件下的邊界條件的處理，同時數值模擬具有高可重復性，且數值模擬的成本和人力開銷等遠低於物理模擬，因此研究巖土體工程問題的流形元數值模擬方法是一項具有理論和實際工程應用價值的重要課題。The main contents and conclusions are as follows : 1. the dynamic pressure on the original riverbed and the scour hole are measured. the results show that the characteristics of dynamic pressure in the scour hole are the same as that on the original riverbed
表明在基巖沖刷過程中以及沖坑穩定后，射流沖擊區的脈動壓強與沖坑形成前一樣，都是以低頻大振幅為主，說明在沖刷坑形成后，射流沖擊區水流與無沖坑時一樣，都是大尺度渦不斷破碎和小尺度渦不斷生成的過程。分享友人