unsymmetrical相关论文
Selective C-C bonds formation,N-alkylation and benzo[d]imidazoles synthesis by a recyclable zinc com
Earth abundant metals are much less expensive,promising,valuable metals and could be served as cata-lysts for the borrow......
卟啉三苯基膦盐1与二苯醚醛2发生witting反应,生成了β-位修饰不对称卟啉3,在反应物等摩尔比,以二氯甲烷为溶剂,室温反应,并且不加......
Alkylation reaction utilizing alcohols as alkylating reagents through a borrow-hydrogen(BH)or hydrogen autotransfer(HA)s......
SYNTHESIS AND CHARACTERIZATION OF FLUORINATED POLYAMIDES DERIVED FROM UNSYMMETRICAL DIAMINES CONTAIN
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
SYNTHESIS AND CHARACTERIZATION OF FLUORINATED POLYAMIDES DERIVED FROM UNSYMMETRICAL DIAMINES CONTAIN
A novel unsymmetrical fluorinated diamine monomer with kink non-coplanar heterocyclic structures, 1,2-dihydro-2-(4-amino......
通过解析的方法分析了储存环在部分填充情况下的纵向耦合不稳定性,给出了不稳定性增长率和同步振荡频移的表达式.得到了一个有趣的......
基于对非对称平衡悬架结构的轴荷不均等分配特性研究,通过增加驱动桥上的轴荷进而加大驱动桥轮胎与地面的摩擦力,从而进一步改善了整......
企业家精神的本质是一种敢于冒险的创业和创新精神.创业型企业家是通过自己创办企业即"自我甄别"机制来显示企业家才能的,这就得有......
踏面等效斜度是衡量轨道车辆曲线通过性能和导向性能的重要指标,它同时关系到车辆的行车安全和乘客乘坐舒适性(或货物的完整性),现今有......
从系统工作稳定的角度出发,提出一种分析方法用于非对称轮询多址服务排队系统的高阶性能研究,并以排队队长方差作为系统二阶特性参......
肼类燃料(肼、甲基肼和偏二甲肼)排放于大气中时,可与大气组分:氧、二氧化碳、水、臭氧、氮氧化物、二氧化硫等发生反应,降解主要......
基于隧道开挖引起地表沉降经典Peck公式,考虑砂土地区浅埋非对称近接平行隧道不同开挖步序,研究隧道周围土体横向水平位移及工后地......
针对传统滤波对称窗口在图像边缘处会引入干扰像素引起图像模糊的问题,提出一种非对称有向窗加权均值滤波算法。首先,基于区域极值......
无功和谐波检测要求快速、准确地检测出电流信号,而当三相电压不对称时,由于a相电压与其正序电压之间存在相位差,使得ip-iq检测法......
本文提出一种不对称电力系统潮流算法,该处地对称分量法为基础 ,将三序潮流转换为正序潮流,然后利用正序电压计算负序电坟和零序电压......
Numerical simulation using finite differential code was conducted for the single line railway and four-lane road shallow......
运用波前相因子判断法,对各种非对称单透镜模式分数傅里叶变换全息图作全面系统的分析,讨论了记录和再现各种因素对再现像性质的影响......
不对称故障时,对于撬棒(Crowbar)保护的双馈风机(DFIG)暂态特性分析较少,且传统的分析往往忽略了定子电阻,或不考虑定、转子磁链之间作用,......
在风电机组单机容量不断增大、装机总量持续攀升的现有形势下,风力发电系统面临着电网故障穿越运行等日益复杂的运行工况,对电气性......
针对同步电机外部不对称时的数字仿真计算工作量较大的特点。本文推导并提出了凸极同步电机处于外部不对称运行工况下的一种新的数......
非旋转对称的光学曲面越来越多地应用到现代光学系统中,但对该类光学面形的检测还基本依靠坐标测量机和接触式轮廓仪.利用计算全息......
设计了一种新型点对点全局异步局部同步方式异步互连接口,采用非对称握手协议进行通讯,并在数据路径上加入异步可控FIFO,比传统的对称......
POLYKETONE FROM CO AND STYRENE: A USEFUL COPOLYMER CATALYZED BY A HIGHLY ACTIVE AND STABLE PALLADIUM
A novel coordinated complex [(5-nitrophen)Pd(CF3CO2)2] (5-nitrophen = 5-nitro-l,10-phenanthroline) was first synthesized......
THE PROBLEM OF THE NON-LINEAR UNSYMMETRICAL BENDING FOR CYLINDRICALLY ORTHOTROPIC CIRCULAR THIN PLAT
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Based upon the theory of anisotropic plates, the unsymmetrical large deformation equations of orthotropic circular plate......
煤斗是火电厂燃料系统中的一个重要环节,它又是电厂的事故多发部位。介绍了一种新型的煤斗设计及其应用情况。......
从各向异性板的基本理论出发,推导出正交各向异性圆板的非对称大变形基本方程,利用Fourier级数把问题的偏微分方程转化为一组可积......
<正>A novel unsymmetrical fluorinated diamine monomer with kink non-coplanar heterocyclic structures, 1,2-dihydro-2-(4-a......
以半椭圆形内胆工件为例,分析了非对称形工件的结构特点及由此给成形带来的问题,介绍了对此类工件可以采取的工艺对策,以及可应用于批......
本文模拟分析了在空调室外侧采用一侧部分开缝、一侧波纹的非对称翅片换热器替代原有波纹翅片换热器的情况下,室外换热器的换热系......
本文主要讨论三相不对称负载电路的特点,以及如何利用这种电路判断电源的相序。...
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This article explains the imbalance in DES and introduces the operators in IDEA. At last it puts forward a Unsym-metrica......
Unsymmetrial cooling always exists in melt - spinning process with circle blowing or lateral blowing cooling, especially......
Synthesis and Thermal Decomposition Kinetics of La(Ⅲ) Complex with Unsymmetrical Schiff Base Zwitter
A new unsymmetrical solid Schiff base (LLi) was synthesized using L-lysine, o-vanillin and 2-hydroxy-l-naphthaldehyde. S......
Synthesis, Characterization and Antibacterial Activity of New Ln(Ⅲ) Complex with Unsymmetrical Schif
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A facile,rapid and efficient method for the synthesis of molecular tweezers containing chiral unsymmetrical urea unit in......
A novel series of unsymmetrical porphyrins with aldehyde group at the terminal of the linkage which connected to meso-ph......
研究了非对称弹性粘性阻尼滞迟隔振系统动力学模型的参数识别方法,该模型中弹性恢复力与位移变形之间存在非对称关系。采用电液伺服......
Because of the widespread existence of unsymmetrical system in the production process, its research is getting more and ......