查询词典 ir

Both two complexes exhibit the monomeric solvated structure, whichis determined by elemental analyses, IR, MS and 〓.

产物经元素分析、红外光谱、质谱、〓分析表明是单核溶剂化产物，其组成式为〓。

In chapter four, five new monomeric solvated biscyclopentadienyl lanthanide thiolates,〓THF (Ln = Ho, Yb, La, Y, Gd), have isolated by reaction of 〓 with2-mercaptopyrimidine in THF solution, which have been confirmed by elementalanalyses, IR, MS and 〓 NMR spectra.

三、通过1∶1摩尔比的三茂基稀土配合物〓(Ln=Ho，Yb，La，Y，Gd)与2-巯基嘧啶在四氢呋喃中反应，得到了五个新的含茂基和烃硫基的稀土有机配合物。

Mn-Zn ferrite nanocrystalline was prepared by solgel auto-combustion process,and the technics was analyzed by means of TG-DTA, FT-IR and XRD.

用溶胶-凝胶自燃烧法制备了 Mn-Zn铁氧体纳米晶体，用TG-DTA，FT-IR和XRD等3种分析方法研究了其制备工艺。

K-M composite ceramic membrane tube supported TiO〓 membranes have been prepared by solgel technique and characterized by mercury intrusion, SEM and IR techniques.

采用溶胶—凝胶技术在K-M支承体上制备了负载型TiO〓膜，利用压汞、SEM、IR等实验手段对其进行了表征，考察了溶胶浓度、粘度、浸涂时间和次数等条件对成膜过程和成膜性质的影响。

The results showed that the vibration frequency and intensity of IR and Raman spectra obviously indicated even-odd oscillation with the number of SiO_2 units.

结果发现，在红外和拉曼光谱中振动频率和强度随着二氧化硅纳米线单元个数的奇偶变化，表现出奇偶振荡现象。

But it can also be ascribed to the passion shooters have for the ir sport.

然而，选手们对射击运动的激情也推动了其快速发展。

Structure of superplasticizer was characterized by IR and effects of the product on fluidity of cement paste and water reduction for concrete were investigated.

利用IR表征了其结构，并考察了产品对水泥净浆流动度和混凝土减水率的影响。

The final products were characterized by HNMR and IR ,which shows that the resultants are the objective products.

通过IR和HNMR图谱分析证明合成物质即为目标产物。

The printed circuit assembly is IR or convection reflowed at a temperature between approximately 280 and 290 degrees C, and maintains solder connection integrity when the printed circuit assembly (36) is later incorporated into a second printed circuit assembly using a standard tin-lead solder system.

该印刷电路组件在约280―290℃的温度下通过IR或对流加热而发生回流，并且当该印刷电路组件（36）随后通过标准的锡―铅焊料系被安装至第二印刷电路板时维持焊料连接整体性。

UV absorptions of the complexes are redshifted compared with those of the monomers owing to the less LUMO-HOMO energy gap. IR frequencies of N-H bonds in the complexes are lessened due to the formation of hydrogen bonds.

LUMO-HOMO能隙的减小使电子光谱吸收峰发生红移，氢键的形成削弱了单体原来的N-H键，使红外振动频率变小。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。