查询词典 synthesis method

The invention relates to a method of preparing acetophenone by ethylbenzene photocatalysis and oxidation, belonging to the technical field of organic synthesis application.

本发明涉及一种乙苯光催化氧化制备苯乙酮的方法，属于有机合成应用技术领域。

A new way of synthesis 2-methoxy-4'-trifluoromethyl acetophenone by the method of crossed ester condensation was investigated in the overall yield of higher than 85%.

本文提出了一种新的方法——交叉酯缩合法合成2-甲氧基-4'-三氟甲基苯乙酮。

A novel method for the synthesis of α-bromo acetophenone s by the reaction of 1,3-dibromo- 5,5-dimethylhydantoin with p-toluenesulfonic acid in methanol at 20～60 ℃ was described.

报道了使用1，3-二溴-5，5-二甲基海因和对甲苯磺酸在甲醇中和20～60℃的温和条件下合成α-溴代苯乙酮的新方法。

A new method for the direct synthesis of α-acyl methylenetriphenyl-arsoranes from readily available arsonium salts was afforded.

提供了一个由α-位具有强吸电子取代基的鉮盐一步合成α-酰基胂叶立德的新方法。

The synthetic method for nickel borate acylate, a kind of rubber-steel c ord adhesion promoter, through nickelous carbonate borate and mixed carboxylic a cids was studied, and many factors influencing the synthesis of NBA were investi gate d systematically.

研究了以碳酸镍、硼酸酯和混合羧酸合成新的金属橡胶粘合促进剂硼酰化镍的新方法。系统地考察了各种因素对合成硼酰化镍的影响。

"Control System Synthesis by Root Locus Method, AIEE Trans.

Part II，69(1950)，pp.66-69即已基本上建立起根轨迹法的完整理论。

The present method has many obvious advantages, which provides a simple and efficient method for the synthesis of the N-substituted pyrroles.

证明了吡咯的烷基化在离子液体中能高效的选择性地完成，本方法是一种简单、温和、有效的合成N-取代吡咯的方法。

In the aspect of prosodic modifications of Chinese spech synthesis, the thesis presents a tone modification method and a syllable duration modification method, and make a summary of prosodic modifications rules.

在汉语语音的韵律修正方面，本文提出一种汉语语音合成中的声调修正算法和一种音长修正算法，并较为完整地总结了各种汉语语音的韵律修正规则。

The Pd-supported catalyst on MCM-22 synthesized by static method shows a higher acetone conversion than that prepared by dynamic method in one-step synthesis of methyl isobutyl ketone from acetone.

在丙酮一步法合成甲基异丁基酮反应中，静态条件下合成的MCM-22为载体的催化剂的丙酮转化率较高，这是由于该分子筛的酸量较高所致。

Also the convergence of temporal difference method is discussed. The method is put forward that Neural Network is used to implement multiaction Adaptive Heuristic Critic and Q-learning first, and then the five methods that can speed up the reinforcement learning are presented in allusion to slow learning speed of reinforcement learning system, they are quantisation of input space, local approximating neural network used to realize the reinforcement learning system, synthesis reinforcement learning algorithm, action model and prior knowledge.

针对强化学习系统学习速度较慢的问题，提出了提高强化学习速度的5种方法，即输入空间的量化方法、采用局部逼近神经网络实现强化学习系统方法、采用强化学习综合学习算法和利用动作模型及先验知识等方法，通过仿真实验验证了所提出方法的有效性。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。