anniversary reaction

By analysing stereo-structures of the reaction products in several types of reactions,such as addition reation of alkene,β-elimination reaction of alcohol and the halohydrocabon,pericyclic reaction,we summarized the relationship between reactant structures and reaction mechanisms.

归纳了烯烃的加成、醇及卤代烃等化合物的β 消去、周环反应等反应产物的立体结构与反应物结构和反应历程的关系,探索出一种用简单的数学方法推知这些有机立体化学反应产物结构的方法。

A simplified form of the generalized Woodward-Hoffmann pericyclic selection rule (SGWH rule) is universally applicable to the pericyclic reactions of all kinds.

简化的普遍化 Woodward- Hoffmann周环选择定则 (SGWH定则 )可适用所有类型周环反应 。

We have demonstrated by using Dewar- Zimmerman selection rule that for any simple connected pericyclic reaction the statements of the Woodward- Hoffmann and Tang- Jiang selection rules are equivalent.

:用 Dewar- Zimm erm an选择定则说明了 Woodward- Hoffmann选择定则和唐 -江选择定则对任何简单联接周环反应都是等同的 。

Study on Planting Patterns of Year Round Forage Supply and Techniques of Cultivation and Utilization in Intensive Agricultural Regions;

南方集约农区牧草周年供应种植模式及栽培利用技术研究

Study on Supplying Green Forages Around the Year to Stable-fed Beefcattle Raised by Small Households in Jiangxi Province;

江西省小农户舍饲养肉牛青饲料周年供应模式的研究

The Operational Characteristics of Multi-stage Responding Time in a Supply Chain;

供应链多阶响应周期的运作特点研究

We trust you may secure some of the exceptional value from among what we shall offer you during the week of may 1 7, 19 .

相信本公司19 年5月1日至7日的一周期间内供应的货物定能使您得到意外的收获。

We trust you may secure some of the exceptional values from among what we shall offer you during the week of May 1 - 7, 19 - .

相信本公司19-年5月1日至7日的一周期间内供应的货物定能使您得到意外的收获。

Upon completion in 1997, the station will help ease the power shortage in Lhasa and the surrounding area.

1997年电站全部建成后，将从根本上缓解拉萨及周围地区电力供应紧张局面。

The Influence of Cash Cycle on Performance of Supply Chain Based on Petri Net

基于PetriNet的资金周转周期对供应链绩效影响

The supply of vegetables falls short of demand this year.

今年蔬菜供不应求。

Study on the Selection of Supply Chain Based on Product Life Cycle;

基于产品生命周期的供应链选择研究

Supply chain system framework based on collaborative lifecycle;

基于协同周期的供应链系统体系结构

（We can supply the commodities all the year round .We can supply 10,000Mt/month.

我们可以长年供应，每月可供给一万吨。

Supply of Power in Fighting against Poverty--In Commemoration of the 20th Anniversary of the Declaration on the Right to Develop;

反贫困的能力供给——纪念《发展权利宣言》20周年

Supply chain multi-stage response time decision-making model based on bi-level programming;

基于二层规划的供应链多阶响应周期决策模型

An Integrated Model for Shortening the Responding Time of Multi-stage SCM;

基于缩短多阶响应周期的供应链集成模型

New Plan Mode in Supply Chain for Shortening Multi-stage Response Time;

缩短多阶响应周期的供应链新型计划模式

A Study on the Supply Chain Mode Based on Shortening Response Time;

基于缩短供应链响应周期的运作模式研究

Logistics Mode for Shortening of the Multi-stage ResponseTime of Supply Chain;

缩短供应链多阶响应周期的物流模式研究

A Judging Model for Shortening the Multi-stage Responding Time in Supply Chain;

缩短供应链多阶响应周期的一个判断模型