转位

A novel carbonyl transposition led by anilines'nucleophilic addition to methyl 2-keto α-D-glucopyranoside was discovered. And the mechanism of the reaction concerned to an enol rearrangment was provided through tracing the change of 〓H-NMR and 〓C-NMR of a hemiacetal intermediate which was obtained in the reaction of o-phenylene diamine with 2-keto glycoside. Both the intermediate and the converting product were identified by 〓H-NMR,〓C-NMR,〓H-〓H COSY and HMQC.

一、发现了2-位氧化α-甲基D-葡萄糖苷的芳胺亲核加成引起羰基转位的新方法，利用核磁共振氢谱及碳谱对邻苯二胺与2-位氧化α-甲基D-葡萄糖苷加成生成的稳定中间体半缩酮化合物在氘代丙酮中的变化进行跟踪，结合对转化产物的氢氢相关谱和HMQC结构确证，提出了该反应中2-位羰基通过烯醇化互变而转至3-位的机理并得到了验证。

A relatively thorough research on the structure of the indexable milling cutter serial-parametric system and its key technology is presented in this paper.

从可转位铣刀设计的特点和参数化设计技术的要求出发，对可转位铣刀系列化设计环境的体系结构及其关键技术做了较深入的系统的研究，开发了系列化可转位铣刀的参数化设计系统。

The structure of cermets indexable milling cutter and the shape indexable blade are introduced on the paper.

论文说明了研制的金属陶瓷可转位铣刀的结构及可转位刀片的形状，分析了金属陶瓷可转位铣刀的角度的选择。

The effect is less satisfactory with SRR or IOT, SRRCPF on SRRCIOT is better in the treatment of DVD and it is fit DVD combined with overaction of inferior oblique patients.

单独上直肌后退和下斜肌转位术治疗DVD不如后退＋后固定缝线组及后退＋下斜肌转位组效果可靠。关键词斜视外科手术，眼外肌

Whereas solenoid valves have a fixed displacement, that of a piezo actuator can be varied.

鉴于螺线阀的转位是固定的，而压电致动器的转位可以变换。

OBJECTIVE To analyze pathoanatomy and modus operandi of 47 patients with Double Outlet Right Ventricle, and evaluate individual operation design of DORV.METHODS47 patients (31male, 16 female) aged from 2 to 26 (mean 13.6±12.1) with DORV were operated from Jan 1997 to Jan 2006, 46 of these patients had pulmonary artery stenosis.

诊断为单纯DORV者36例，DORV合并镜面右位心、内脏转位5例，1例合并下腔静脉闭锁、左上腔静脉畸形引流及无顶冠状静脉窦畸形，2例Taussing-Bing心脏畸形，2例伴有完全型房室隔缺损（其中1例伴有大血管转位），46例患者均伴有肺动脉狭窄，临床表现为紫绀和杵状指。

Postoperative right-sided obstruction occurs more frequently after ASO repair of Taussig-Bing heart than after TGA arterial switching, leading to higher reintervention rate.

Taussig-Bing 心脏畸形行心脏转位术（ASO比大动脉转位行心脏转位术后更可能发生术后右室流出道梗阻，导致更高的再介入率。

In order to reduce the influence of position error in every standstill-position of turntable on north-seeking precision, the work process of the Dynamically Tuned Gyro multi-position north seeker and the principle of the azimuth arithmetic are introduced, and the relation between position error and north-seeking precision is analyzed.

针对实验过程中转台在每个转位处存在的转位误差对系统寻北精度的影响，介绍了动调陀螺多位置寻北仪的工作过程及真北解算原理，进行了转位误差对寻北精度影响的误差分析。

Position transformation error is a important part in research of north seeking scheme, the thesis analyses position transformation bringing error of north seeking in two-position scheme and brings forward the method of position transformation error measurement and compensation.

在寻北方案的研究中，转位误差是一个不可忽视的部分，文中以二位置为例分析了转位误差引起的寻北误差和转位误差的关系，并提出了测量和补偿方法。

operation process and arithmetic of the two-position gyro-based north seeker are introduced.

文章介绍了二位置陀螺寻北仪工作过程及算法原理，它采用陀螺仪在相差180°的两点上采样相互对消陀螺常值漂移的方法，提高寻北精度；其突出特点是结构简单，实现方便，精度较好；为了提高寻北精度和缩短寻北时间，文章找出误差源中的转位误差，并分析了转位误差对寻北误差的影响，推导了误差公式，得出转位误差引起的寻北误差是一个常量的结论，同时提出了转位误差的测量与补偿方法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。