The neighboring group participation and non-classical carbonium ion;
邻基参与与非经典碳正离子
There are three kinds of neighboring group participation in reaction course, which is n—participation course and o—participation course.
邻基参与反应的历程主要有三类 ,即n—参与历程、π—参与历程和σ—参与历程 ;分为二步 :( 1)反应物的邻基从反面进攻α—碳原子 ,形成中间体 ,构型转化一次 ,为分子内的SN2反应 ;( 2 )外部的亲核试剂Nu—从邻基的反面进攻中间体 ,构型又转化一次 ,再发生一次分子内SN2反应 ,其结果是 :该类反应总的来说属于SN1反应历程 ,产物的构型保持不
Under such background,investigate current situation of China s grass roots political participation,research its deep reasons of formation,taking this as the initial logic point,seek actively for promote the route of China s grass roots political participation.
基层政治参与作为衡量政治民主化和政治发展的重要标准,正在成为我国民主政治建设和社会主义和谐社会建构的重要内容。
Neighboring Group Participation in Electrophilic Cyclization and Diiodonation of a-Alkynylol;
邻基参与的a-炔醇的亲电环化和二碘化反应
An Automated Stellar Spectra Classification System Based on Non-Parameter Regression and Nearest Neighbor Method
基于非参数回归与最近邻方法的恒星光谱自动分类
Neighbor-Group Method and Descriptor Selection for QSAR Based on SVR;
基于SVR的参数汰选及近邻群法在QSAR上的应用
The Character Parameterization Design for Virtual Production Based on the Field Knowledge;
基于邻域知识的虚拟产品特征参数化设计
Short-term traffic flow forecasting based on K-nearest neighbors non-parametric regression
基于K-邻域非参数回归短时交通流预测方法
Spatio-Temporal Shifts in Narration and Multiple Themes of Neighbour Rosicky
《邻居罗西基》的时空叙事与复调主题
Synthesis and characterization of 5,5-dimethyl-1-(o-aminophenyl)-1,3-hexadiyne
5,5-二甲基-1-邻氨基苯基-1,3-己二炔的合成与表征
The Analysis of Interaction between Excavation of Foundation Pit and Nearby Pile Foundation;
基坑开挖与邻近桩基础的相互影响分析
She is always eager to have a finger in the pie if her neighbours are planning any little festivity.
要是她的左邻右舍准备办任何小的喜庆事，她总是巴不得参与其事。
Study on the Dynamic Response and Support Parameters of Adjacent Tunnel Wall Rock under Dynamic Load;
动载作用下邻近巷道围岩动态响应与支护参数的研究
A New Polygon Filling Algorithm Based on Pertinence Between Point and Its Abutting Sides
基于顶点与邻边相关性的多边形填充算法
THE MOLECULAR STRUCTURE AND CRYSTAL STRUCTURE OF BIS (o-HYDROXYBENZYLAMINE) COPPER(Ⅱ)
无水双邻羟基苄胺铜(Ⅱ)的分子结构与晶体结构
Studies on Solid Metal Complexes of o-Hydroxybenzyl-Amine (HBA) with Cu(Ⅱ), Fe(Ⅲ)
铜(Ⅱ)、铁(Ⅲ)与邻羟基苄胺固体配合物的研究
The Theory and Numerical Analysis on Settlement of Adjacent Pile Foundations Due to Tunnel Excavating;
隧道开挖引起近邻桩基沉降的理论与数值分析
Research on the Ground Settlement Caused by the Shield Construction and the Protection of the Adjacent Buildings;
盾构施工引起地基移动与近邻建筑保护研究
Design and realization of OSPF neighbor state machine based on TMS architecture;
基于TMS结构的OSPF邻居状态机设计与实现
The P2P Network Model Based on Neighboring Node and Interest Grouping
基于邻近节点与兴趣分组的P2P网络模型
Synthesis and Characterization of N-(Ortho-Substituted Phenyl) Maleimides
N-邻位取代苯基马来酰亚胺的合成研究与表征