查询词典 extraction

In this thesis, the theory, algorithm and applications combined with the project "research on the feature extraction and analysis of XX acoustic vector" are discussed, according to the present development, main problems and practical needs in application of feature extraction of pressure and acoustic vector signals.

本文根据声压和声矢量信号特征提取的研究现状、存在的主要问题以及工程实际应用的基本要求，结合基金项目"XX声矢量特征提取与分析研究"的内容，对目标特征提取及其分类识别进行了理论、算法与应用方面的探讨。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

N,N,N',N'-tetrabutyl-3-oxa-pentanediamide presents excellent extraction abilities for actinides elements. The effects of hydrolysis and radiation on extraction behavior of U with TBOPDA have been investigated.

N，N，N'，N'四丁基 3 氧戊二酰胺对锕系元素具有良好的萃取性能，为了考察TBOPDA稳定性，研究了温度、酸度和吸收剂量对TBOPDA萃取性能的影响。

Experimental results were processed and it was found that 1: 1 adduct of alcohol and acylate is formed in every extraction process, and that acylate can give higher extraction equilibrium constant for alcohol than the corresponding organic acid.

由实验数据回归出了络合剂与醇的络合比及络合萃取平衡常数。金属有机酸盐与醇的络合萃取平衡常数远远大于相应的有机酸与醇的络合萃取平衡常数。

Our company have advanced equipment, the existing variety of extraction, processing, production equipment 85 Units, of which: quarrying track 4 Units sawing machine, 10 sets of pneumatic air compressor, automatic bridge saw stone machine combination, single-arm combination Stone sawing machine 16 Units, 23 Units grinder, saws Stone Trimming Machine Units 8 and so on, at present, Henan Province are granite extraction, processing, extraction, processing, production base, the largest granite stone, products are sold throughout the country and foreign markets.

本公司设备先进，现有各种开采、加工生产设备85台，其中：采石轨道锯切机4台，空压机风钻10套，全自动桥式组合锯石机、单臂组合锯石机16台，磨光机23台，锯石切边机8台等等，目前是河南省花岗岩开采、加工开采、加工生产基地，规模最大的花岗岩石材，产品销往全国各地及国外市场。

Supercritical fluid extraction technology different from the traditional steam distillation and organic solvent extraction method is a new, highly efficient, energy-efficient, and clean the oil extraction technology.

超临界流体萃取技术有别于传统的水蒸气蒸馏法和有机溶剂萃取法，是新兴的、高效的、节能的和洁净的精油萃取技术。

Ingredient: Deep sea cleanser gene, natural willow extraction, bee gel extraction, corn mint and herbs extraction.

成 分：海洋深层洁肤因子、天然柳树皮萃取液、蜂胶萃取液、清爽薄荷和草本植物精华成分。

But when the pressure is bigger than 30MPa, there is a contrary phenomenon. The flow rate, particle size distribution and void fraction of the extraction bed have the complicated effect. 3Based on the broken-intact cells model, a dynamic model based on differential mass balance equation is developed according to the law of conservation mass. The expression of mass transfer flux is given by the analysis the process and the necessary hypotheses. The extraction process is described, and the expression of extraction rate of diosgenin is given.

3在引入破碎—完整细胞结构理论的基础上，根据质量守恒原理建立了基于微分质量守恒方程的动力学模型，通过对萃取过程的分析和必要的简化、假设，给出了不同阶段传质通量的表达式，在此基础上描述了萃取过程，并给出了超临界流体萃取薯蓣皂甙元的萃取收率表达式。

Methods In this paper, samples of inkpad seals were printed on 4 different kinds of paper with 6 different brands of inks. The strong and weak extraction reagents were selected in the experiment of the double solvent extraction method. The size of slit and scan wavelength were measured, and the relation curve of the extraction percentage of inks with time was drawn.

选用6种不同品牌的印泥和4种纸张分别制作印泥印文的历时性样本，通过实验确定适用于双溶剂提取法判定印泥印文形成时间的弱提取剂和强提取剂；确定薄层扫描时狭缝的大小和扫描波长；绘制盖印时间与提取率的关系曲线。

The extraction condition of the brown coal in different solvent is introduced,for its extraction principle and the influencing factor of extraction rate make comprehensive statement.

本文介绍了褐煤在不同溶剂中的萃取情况，对其萃取原理和萃取率的影响因素做了综合叙述。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。