A type of chiral molecular tweezers has been designed and synthesized by using diphenic acid as spacer and chiral unsymmetrically disubstituted urea as arm for the first time. 以联苯二甲酸为隔离基,手性不对称脲为手臂,设计合成了一类新型的手性分子钳。
Nonlinear finite element analysis of the room-temperature shape of unsymmetrically laminated composites asymmetric multiple ray 非对称铺层复合材料板室温形状的非线性有限元分析非对称的多次波射线
Synthesis and Application of Unsymmetrically Substituted Ureas 非对称取代脲的合成与应用
Evaluation on structure stability of unsymmetrically loaded tunnels using the theory of information optimization analysis 偏压隧道结构稳定性评价的信息优化分析浅议评估的定义论ITS的结构体系
On Some Problems for Unsymmetrically Lateral Buckling of Rectangular Plates 矩形板不对称侧向屈曲中若干问题
The paper introduces the measures adopted to treat the severe defects in the lining of an unsymmetrically loaded multi-arched highway tunnel with large-scale cracks in the mountain mass above it. 文章介绍了某高速公路偏压连拱隧道在衬砌结构发生严重破坏和隧道上方产生规模较大的山体开裂的情况下,所采取的病害处理措施。
Model test and reliability analysis for an unsymmetrically loaded tunnel 偏压隧道模型试验及可靠度分析
The relation between structural stability of unsymmetrically loaded tunnel and original data is established with the help of the information optimization theory, and the tunnel stability is evaluated with these data. The method is proved credible by field measurements. 利用原始数据,根据信息优化理论建立原始数据信息与偏压隧道结构稳定性关系,对结构稳定性进行评价,经过计算分析和工程检验,证实了该方法的可靠性。
The synthesis of unsymmetrically substituted porphyrins and their metal complexes 具有不同长度碳链的不对称四苯基卟啉及其金属配合物的合成
Design and synthesis of chiral diphenic acid-based molecular tweezers containing unsymmetrically disubstituted urea unit 手性不对称脲联苯二甲酸分子钳的设计合成一系列二茂铁二取代物的合成和表征
Analysis for Heat Transfer in Micro-annular Channel with Unsymmetrically Heated Walls in Slip Flow Regime 滑移流区内微环缝通道单侧等壁温加热下的换热
Based on the Karman type refined plate theory, the buckling behavior of unsymmetrically laminated angle ply shear deformable rectangular plates with four edges simply supported is analyzed. The latest version of the generalized Karman equations counting for the transverse shear deformation are applied here. 基于Karman型板的精化理论,研究了双向压缩四边简支矩形板的屈曲性态,分析中应用了计及横向剪切效应的广义大挠度Karman方程。
One-pot Synthesis of Chiral N, N '-Unsymmetrically Disubstituted Urea 一锅法合成手性双取代不对称脲
Seism CT detection on geological defects in one unsymmetrically loaded multi-arched tunnel and the treating measures 某偏压连拱隧道地质病害地震CT探测及病害处理
An analysis for heat transfer between two unsymmetrically heated parallel plates with micro space in slip flow regime 不同热流下平行平板微槽内流体滑移流动与层流换热
The Condensation Reaction of Unsymmetrically Controlled Aldehyde Alcohol 不对称控制的醛醇缩合反应
An Initial Research on Method of Deciding Designing Flow of Pipelines Arranged Unsymmetrically in an Automatically Spraying Fire-extinguishing 自动喷淋灭火系统非对称布置管段设计流量确定方法浅论
Analysis on the Structure Stability of the Unsymmetrically Loaded and Connecting-arch Tunnel Caused by Different Construction Orders 不同施工顺序对偏压连拱隧道结构稳定性的影响分析
In this paper, based on model test and reliability theory, the mechanical behavior of unsymmetrically loaded tunnels is studied. Further, the reliability indices and failure probabilities of the lining structure in an unsymmetrically loaded tunnel are analyzed. 以模型试验和可靠度理论为基础,研究了偏压隧道的力学行为,分析了偏压隧道衬砌结构的可靠指标及失效概率。
First, the electromagnetic damping force when motors run unsymmetrically is obtained by using electromagnetic field theory, and the rotor vibratory differential equation is obtained by using Lagrange-Maxwell ′ s equation. 用电磁场理论得到了电机三相不对称稳态运行时电磁阻尼力,应用拉格郎日-麦克斯韦方程得到了考虑电磁阻尼的转子横振微分方程。
Study of unsymmetrically Chopped Mode of a PEV imaging system PEV摄象机非对称斩波模式研究