natural tracer 中文意思是什麼
natural tracer
解釋
天然示蹤劑-
Tree ring is a kind of natural archives, on which the isotopic analysis is important to study global climate and environmental change. the authors mainly provide a comprehensive introduction to the fractionation models of carbon, hydrogen and oxygen isotope in plants, their research techniques and the extract methods from cellulose. that results show isotopic tracer can record the message of climatic variation and has become a powerful tool for paleoclimate reconstruction and for the modern environment changing research. especially studying on pages, the cellulose isotopic analyses of imbedded old tree ring have become the mainly quantitative means of environmental evolvement. in addition, china is a typical monsoon country, research in tree ring stable isotope seasonal variation can give us a lot of important information on that. up to now, the research techniques and works on tree ring in our country are still in its earlier stage, and remain many limitations. it needs further accumulate basic research materials, intensify regional contrast and intercross studies on relative subjects
尤其是在過去全球變化pages研究中，埋藏古木纖維素中的碳氫氧同位素分析已成為環境演化研究的主要量化手段。另外，對于中國這樣典型的季風氣候國家，開展樹輪穩定同位素隨季節性變化的研究具有重要的意義。我國在樹輪研究方面起步較晚，研究方法和研究內容上也比較簡單，還存在不小差距，既要進一步積累基礎資料，又要做區域對比，加強與相關學科的交叉研究。 -
Surface microtopography, representation and tracer of microscale vortex dislocation of hydrothermal synthetic sapphires and natural beryls are studied by using atomic force micro - scope and interference microscope
摘要採用原子力顯微鏡、干涉顯微鏡對水熱法合成藍寶石和天然綠柱石等寶石的表面微形貌進行了研究。 -
Plain tracer : with plastic or natural wood handle ; metal saw tooth and economical using
金屬齒式描線輪：塑柄或原色木柄，輪體部分為金屬鋸齒，經濟實用。 -
Calculation of natural ventilation rates by tracer gas decay method was proposed, and definition of indoor criterion of carbon monoxide concentration limit and the carbon monoxide emission from cars were discussed
提出了利用示蹤氣體法計算地下停車庫的自然通風量，並論述了如何確定室內一氧化碳允許標準及小汽車的一氧化碳排放量。 -
A brief introduction was given to the concept of natural tracer method, the characteristics of temperature and conductance distribution in groundwater, and the theory of heat - source method and conductance method for leakage detection
摘要簡述天然示蹤法的概念、地下水溫度場和電導場分佈特徵、熱源法原理及電導滲漏測試原理。
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