Objective To investigate the changes of cerebral oxygen extraction fraction (OEF) following acute cerebral infarction and its clinical value in old patients.
目的探讨老年急性脑梗死后脑氧摄取分数(OEF)变化及临床价值。
Fucoidan is a sulfated polysaccharide from brown seaweed, which has a variety of biological activities. the studies on the extraction, purification and fraction of fucoidan are summarized.
褐藻糖胶是存在于褐藻中的硫酸酯多糖，具有多种生物活性。本文综述了褐藻糖胶的提取、纯化和分级等方面的研究工作。
The extraction efficiency of organic light-emitting diode(OLED) is restrained by the high fraction of energy of the guided wave in the high-index materials(ITO/organic).
有机发光二极管（OLED）发光效率很大程度上受到器件中高折射率材料（ITO/有机物）对导波光能量的制约。
The extraction raffinate can be concentrated by one-stage evaporation to obtain sulfuric acid with 80% of mass fraction.
萃余液经一次性蒸发浓缩，可得到质量分数80%以上的硫酸。
Gas oil fraction of shale oil is unstable. To address this problem, the authors of the article propose a new solvent extraction-alkali washing refining process.
针对页岩油粗柴油馏分不稳定问题，提出了一种溶剂萃取-碱洗精制工艺。
In order to enhance the rate of accuracy and coverage fraction in the information extraction process, it has introduced the domain main body in the information extraction retrieval system.
为了实现提高信息抽取过程中的准确率与覆盖率，在信息抽取检索系统中，引入了领域本体。
In order to enhance the rate of accuracy and coverage fraction in the information extraction process, it has introduced the domain main body in the information extraction retrieval system.
为了实现提高信息抽取过程中的准确率与覆盖率，在信息抽取检索系统中，引入了领域本体。
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