定位环

Re-tighten the graduation-ring setscrew.

重新上紧赤经兼小时刻度环的定位螺丝。

This device utilizes DC servo motor and fine precision feedback variable resistor and closed loop control so it has the advantage of fine static control and low mechanical noise.

本装置利用DC伺服电机配以高精度反馈电位器及闭环控制电路，具有较高的定位精度，较小的机械噪声，全部拍片过程通过微机自动控制，操作简捷，使用方

Voice coil motor: motor closedloop control for accurate positioning the head on the track.

音圈电机：闭环控制电机，用于把磁头准确定位在磁道上。

To further explore tillage practices for improving soil structure, the effect of different tillage practices on the structure and organic carbon of tilth soils were investigated using routine method (Wet-sieving, Potassium dichromate volumetry and Core-cutting sampling).

为了寻求能够提高土壤结构稳定性的耕作模式，在陇中黄土高原半干旱区连续7年的定位试验研究基础上，采用常规分析方法(湿筛法、重铬酸钾容量法、环刀法)，研究了不同耕作方式对耕层土壤结构性能及有机碳含量的影响。

To reduce the screw errors produced by the machine tool driving train, the forward and backword positioning values were measured by laser interferometer and the results were used as a nonlinear unit in the semi-closed loop structure to fulfill the screw compensation.

为降低机床传动机构所产生的螺距误差，通过激光干涉仪实际测量正反向定位值，将测量结果作为一个非线性环节引入半闭环结构中实现机床的螺距误差补偿。

This paper proposes a distributed IMS network system based on the bicyclo chord distributed routing strategy so as to effectively solve the centralized CSCF server "single point of failure" and "performance bottleneck" problem.

提出了一种基于双环Chord资源定位的分布式IMS网络系统，从而有效解决集中式CSCF服务器&单点失效&和&性能瓶颈&的难题，实现IMS网元均质化，优化了系统路由效率，增强了系统的可控性、抗灾能力、扩展能力和负载均衡能力。

According to the 13CNMR chemical shifts of substituted benzene, conjugative effect parameter and inductive effect parameter are established.

以取代苯苯环碳原子化学位移为依据，用曾经设定并初步证实的甲基诱导效应和共轭效应参数，讨论了甲基取代基的诱导效应、共轭效应及定位效应。

The orientation rule of substituting group s in benzene ring is often explained with electronic effect (inductive effect and conjugative effect).

有机化学教材中通常是从电子效应来解释苯环上取代基的定位规律。

Being of the open-loop control technique,the PWCT is fittable forsuppressing chaos in the ODS with wide period windows when supportedwith the quick algorithm of scanning and localizing the periodwindows,which has been developed for the easy application of thePWCT.The result of the computer simulation of controlling theopticalsecond-harmonic system with the PWCT is presented in the text forattestation.

周期窗口控制技术为开环控制技术，具有快速、简便、易行的特点，它主要适用于在周期窗口较宽的情形下对光动力学系统进行快速混沌压制控制，为便于其应用文中同时开发了相应的周期窗口快速搜索及定位技术，并给出了利用二者控制光学二次谐波系统的计算机仿真结果。

Adopt AT89S51 MCU as the main part to realize the automatic control of the object motion locus in this design, system using multiturn potentiometer to measure the position of object, and introduces local closed-loop feedback control system link to correct error, in that case system can improve the accuracy of control and orientation.

设计采用AT89S51单片机作为核心器件实现对物体运动轨迹的自动控制，通过多圈电位器实现对悬挂物位置的精确测量，并引入局部闭环反馈控制环节对误差进行修正。以达到对物体的控制和对坐标点的准确定位。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。