查询词典 method of synthesis

In this article,the synthesis method of Phenanthraquinone is discussed and five main methods are compared,such as the method of using biphenyl and derivative of diphenylethane and the method of Diels-Alder and rearrangement as well as the direct oxidation.

本文对菲醌的合成方法进行了综述并对其几种方法作了比较，其合成方法主要有以联苯及二苯乙烷衍生物为关键中间体的方法、以Diels-Alder及重排反应为关键步骤，以及直接氧化等五类合成方法。

Firstly, this paper introduces the domestic and foreign present research situation and correlative knowledge, proposes the method of traffic organization optimal and plan estimate; Secondly, this paper depicts signalized intersection organization optimum detailed from method of transit, channelization design and signal design, namely carries on the synthesis optimization design, makes every effort to optimize for the signalized intersection traffic organization provides some scientific, comprehensive and practical theory and method.

论文首先介绍交通组织优化国内外研究现状及相关的基础知识，提出了交通组织优化的思路和优化方案的效果评价方法；其次对信号交叉口交通组织优化从交叉口放行方法、交叉口渠化方法和交叉口信号设计方法三个层次予以详细阐述，即进行综合优化设计，力求为信号交叉口的交通组织优化提供一些科学、全面和实用的理论和方法。

In the aspect of natural language processing needed by speech synthesis, the the thesis presents a new method of Chinese words segmentation, strengthening maximum matching method, and based on the method, a system of Chinese words segmentation which possesses learning ability is developed.

在语音合成的语言处理方面，本文提出一种新的书面汉语自动分词算法——增强型最大匹配法，并用此方法实现了一个具有学习功能的书面汉语实时分词系统。

We construct the synthesis reasoning sources according to the multimedia object low-level features and the reasoning source intensity field according to the multimedia co-existence information. A series of multimedia semantic spaces are built by spectral method after synthesis reasoning. The cross-media retrieval is performed on a per-query basis by which different retrieval methods are adopted for different queries.

首先根据多媒体对象的底层特征构造推理源，根据多媒体对象的共生关系构造影响源场来进行综合推理，并构造出多媒体语义空间；然后针对不同检索例子，根据伪相关反馈为每一个检索例子自适应地选择不同的检索方法进行跨媒体检索。

A new, stereo-controlled method of aldehyde group synthesis is summarized, which is used to synthesize aldehyde group by introducing thiazole ring and has a wide appreciation for bio-activated compounds synthesis.

摘要本文综述了一种新型可立体控制的醛基合成方法––利用唑环引入醛基的方法以及它在具有生物活性物质合成中的应用。

A novel synthesis route is developed according to the synthesis method of aminoacetic acid in the dissertation.

本文借鉴甘氨酸的合成工艺，设计了一条新的合成路线，简单、高效地制备出1-氨基环丁甲酸。

Synthesis process Molecular Formula:〓 Molecular Weight: 394 Chemicla name: N-(2, 3-dihydro-2, 7-dimethyl-benzofuran-1-acyl)-N'-tert-butylN'-(3, 5-dimethyl benzoyl) hydrazine Structural formula:〓 This article define a synthesis method of JS118 with (2, 3-dihydro-2, 7-dimethylbenzofuranyl)-6-formic acid, tert-butyl hydrazine hydrochloride acid and 3, 5-dimethyl benzoic acid as main intermediate through four steps of reaction involving, acyl chloridation condensation and so on.

本文主要的研究工作内容：(1)以N-特丁基双酰肼为先导结构，利用分子等排原理和类同合成法进行先导设计，有目的、有选择地重点改变R〓、R〓基团，将具有不同取代基的苯环以及呋喃环、苯并呋喃环、吡咯环、吡啶环等杂环、稠杂环与先导结构进行有机的组合。

Comparing with the traditional way of stronger sulfuric acid ,The catalyst has its advantage of more effective on the synthesis,the operation is more safer, does not corrode the equipments and does not pollute the environment,and the recovering operation is simple. So it can be called a green method on synthesis of isobutyl acetate.

该催化剂与传统浓硫酸法相比，催化效果更好，作更安全，对设备无腐蚀，对环境无污染，实现了催化剂的重复利用，并且回收作简单，重复利用率高产率好，达到绿色合成乙酸异丁酯的目的。

In this paper,the method for synthesis of 5 new phosphonic acid products,from the reactions of 2-amine thiadiazole and different aldehydes with phosphorous acid by the melting method or the solvent method,was introduced.

用2-氨基噻二唑、醛与亚磷酸反应，应用融熔法与溶剂法合成了一系列新的噻二唑膦酸，并用IR、1HNMR、31PNMR等方法对化合物进行了表征。

The synthesis method of calixcrown ethers was simplified and improved, and 10 Lscale synthesis was carried out.

对杯芳烃冠醚的合成工艺进行了简化和改进，并进行了10L规模的中间放大合成。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。