grounds and lags

In this paper, (R)- and (S)-2,2'-diethynyl-1,1'-binaphthyl with highly stable chiral configurations were em- ployed as structural templates, and a new type of helical cyclophane compounds (R,P)-3 and (S,M)-3 were synthesized in enantiopure form by the introduction of benzyl sulfone through Sonogashira coupling reac- tion, followed by the treatment of disulfone with lithium diisopropylamide (LDA).

基于2,2'-二取代的联萘衍生物在手性构型上高度稳定的特点,分别从光学活性的(R)-和(S)-2,2'-二乙炔基-1,1'-联萘结构模板出发,通过Sonogashira偶连反应导入苄基砜,然后用二异丙基氨基锂(LDA)处理制得的联萘二砜成功地合成了一种新的螺旋环芳分子——对映异构体(R,P)-3和(S,M)-3。

formwork structure and installation technology of 60m precast box girder of Qingdao Gulf Bridge

青岛海湾大桥60m预制箱梁模板结构及安装施工技术

Shaking table test and analysis of model structure installed magnetorheological damper under different control strategies;

不同控制策略下安装磁流变阻尼器的模型结构振动台试验与分析

Study on model structure and approximation performance of Support Vector Regression;

支持向量回归机模型结构及性能的研究

The results showed that optimal algorithms cannot give a sound explanation for complexity of model structure and identifying model parameters via uncertainty analysis methods presented an effective alternative to understand model system.

结果表明参数优化算法与传统灵敏度分析方法不能解释模型结构复杂性特征 ,采用不确定性分析方法对环境模型参数进行识别提供了深入分析与理解模型系统的有效途径 。

The structural model of affecting factors of management misconduct in coalmine fatal accidents in China;

煤矿重大事故中管理失误行为影响因素结构模型

Analysis of structural models of precipitatesη,η′in Al-Zn-Mg alloys;

Al-Zn-Mg合金中η′,η析出相结构模型的分析

A preliminary discussion on the structural model of ecosystem stability in Karst basin;

喀斯特流域生态系统稳定性结构模型初探

The Template-structure of Intelligence Long-distance Teaching By Agents

基于多Agent的智能远程教学的模板结构

Draw forming simulation and die-structure optimization of front fender

翼子板拉深成形模拟及模具结构优化

A COMMONLY-SIGHTED ROCK MASS STRUCTURE--SLAB-RENT STRUCTURE AND ITS MECHANICAL MODEL

一种常见的岩体结构——板裂结构及其力学模型

Big Distort Sheet-pile Wall Structure Numerical Simulation and Structural Property Analysis

大变位板桩墙结构的数值模拟与结构特性分析

Optimization Design on Mold Structure and Press Process of Conveyor Chain Boundary Plate

输送链附板结构、加工工艺与模具结构优化设计

Fabrication of Nano-porous SiC-based Ceramics Using Template Method;

模板法制备SiC基陶瓷纳米孔结构材料

Synthesis of Mesoporous Titania Using Templates and Its Structural Modifications;

介孔TiO_2的模板法合成及结构修饰研究

Polyaniline Nanotubes Obtained by Template Method;

模板法制备聚苯胺纳米管状结构材料

Simulate the Heating Stress of ROF Bottom Plate and Optimize the Structure;

ROF炉底板热应力模拟与结构优化

DNA-templated Formation of ZnO Nanoparticles Chains;

以DNA为模板合成氧化锌纳米链状结构

Structured Design Excellent Courseware Template In Authorware;

Authorware中结构化设计精品课件模板

The Mode Analysis and Position Selection of Perforated Panel Absorber

穿孔板吸声结构模态分析及位置选择

Assembly of ZnO Nano-Chains Based on DNA Template

DNA模板法组装氧化锌纳米链结构

Calculation model and Pushover analysis for a multi-ribbed slab structure

密肋壁板结构计算模型及Pushover分析

Reliability Analysis of Steel Tubular Support Under the Function

基于功能的模板支架结构可靠性分析

Large-span Structural Engineering Application of Highsupporting Wooden Template

大跨度结构工程高支撑木模板的应用

The application of shear wall structure steel large formwork construction technology

剪力墙结构钢制大模板施工技术应用

Comparative analysis of simplified computation models of a multi-ribbed slab structure

密肋壁板结构简化计算模型对比分析