查询词典 control vector

Results:The results showed that all of four mdr1-shRNA expression vector can significantly knockdown the expression of p-glycoprotein as compared with control vector,moreover,the vector targeting 508-526 sites of MDR1 gene is the best one.

结果：与对照载体相比，构建的4个MDR1-shRNA质粒载体均能有效下调MDR1的表达，P-糖蛋白的功能也明显降低，其中508-526靶位点的shRNA作用效果最好。

With the development of various technologies such as motor control, Vector Control and Direct Torque Control appear one after the other. Hereinto, VC is been applying broadest for it's excellent performance.

随着交流电机控制等各种技术的发展，矢量控制和直接转矩控制等高性能调速系统相继出现，其中矢量控制以其优良的性能成为目前实际应用最为广泛的调速方法。

The level of VEGF mRNA was elevated after 6h when 8Gy irradiation was processed and maintained to 72h. Sense and anti-sense expression vector were transfected into vascular endothelial cells and stable cell lines were established. Cell line transfected sense expression vector of VEGF_(165) gene showed reduced inhibition of prolifetation, MNF, MNCF and apoptosis compared to that of control vector, while opposite results were obtained in anti-sense transfected cell line.

转染正义表达载体的ECV-304稳定细胞系经过4Gy γ射线照射后，与转染空载体的细胞相比，细胞增殖抑制率减弱，MNF、MNCF以及凋亡减少；而转染反义表达载体的细胞系与转染空载体的细胞相比，细胞增殖抑制率增强，MNF、MNCF以及凋亡增加。

Firstly, the pGL3-Control vector was reconstructed , the pGL3-Enhancer vector deletious of SV40 promoter gene was obtained . Then the IFN-β promoter gene was cloned into the pGL3-Enhancer vector and pGL-IP21, the Luciferase reporter plasmid with IFN-β promoter was OK. The availability of pGL-IP21 was verified by NDV ,the inductor of IFN-β, the Luciferase activity was assayed in cells transfected with pGL-IP21 by Luminometer.

首先将pGL3-Control载体进行了改构，除去了SV40启动子基因，获得了pGL3-Enhancer载体，将获得的IFN-β启动子基因连入载体中，构建了带有人IFN-β启动子基因的荧光素酶报告质粒IP-21，并且通过实验证明所构建的质粒在干扰素的诱导剂NDV的作用下能够表达荧光素酶活性，照度计检测荧光素酶活性增强，从而验证了所构建的重组质粒的有效性。

Also. the phase difference between response vector and control vector could be obtained through the algorithm. As a result, the important base is established for the phase-shift vibration control of intelligent structure.

同时，矢量算法还可以得到响应信号矢量与控制矢量之间的相位差，为结构振动的移相控制奠定了重要基础。

Based on the analysis of the affected extent of the neutral-point potential by every space vector on all kinds of voltage and current conditions the concept named neutral point control grade was proposed for the first time in this paper. The calculation formulas of NPCG were presented as well. Based on NPCG, a novel modulation scheme called optimized 3D space vector modulation (O3DSVM) scheme was proposed in a-b-0 coordinates based on the translation principle of axes, by which the space vectors with higher NPCG values are selected to synthesize the object vector to suppress the unbalance of the neutral-point potential.

该文通过对各种电流电压状态下每个三维空间矢量对直流中点电位的影响进行分析，提出了"中点控制度"(neutral-point control grades，NPCG)的概念，并给出了NPCG的计算公式；基于NPCG，在a-b-0坐标系下提出一种基于坐标平移原理的新型"三维矢量优化选择调制策略"(optimized 3D space vector modulation，O3DSVM)，该调制策略能优化选择NPCG值较高的矢量以合成目标矢量，从而达到最大程度控制直流中点电位偏移的目的。

According to the classical signal transduction pathway of estrogen, we use Luciferase reporter gene to screen phytoestrogen form Selaginella tamariscina, Pinus massoniana Lamb, Corallodiscus flabellate, Dryopteris sublaeta Ching et Hsu and Leonurus heterophyllus. In this study,the pβgal-Control vector, the pERE-TAL-luc vector, the pCNX2-hERα/pCNX2-hERβvector were transfected into HEK293 cell line. If the components in the herbs combine with the ER, then it could induce the expression of reporter gene controlled by ERE.

根据体内的雌激素信号转导途径，我们选用了以luc为报告基因、ERE为调控序列的重组报告基因载体pERE-TAL-luc，并将其与重组人ERα(humanERα，hERα)表达载体pCXN2-hERα和重组人ERβ(humanERβ，hERβ)表达载体pCXN2-hERβ共转染ER阴性细胞系，建立了靶向ERα或ERβ的细胞水平药物筛选模型，结合小鼠子宫增重实验，对卷柏、松针、益母草、石胆草及贯众等5种中药的植物雌激素作用进行了研究，以期为临床防治更年期综合症等提供准确、科学的实验基础。

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。

This thesis proposed the design and implementation of an ASIC for the motor control with DTC technology. Note that this ASIC is implemented by cell-based Design style with Verilog language.The basic principle of the Direct Torque Control is to select the switch sequence of the inverter. Those switches will control the magnetism and torque of the stator, to induce a fast response of the induction motor. Furthermore, the d-q axle's static coordinate, which is transferred from both the three-phase current and voltage, is used to compute the stator's magnetism and torque. By comparing with original values, those magnetism and torque will be calculated and set to new data. Then the switching table and the hysteresis controller are decided with the new data to generate a voltage vector and to control the stator magnetism and torque.

直接转矩控制的基本原理为经由侦测马达定子磁通与转子转速，来适当的选择变频器功率电晶体的切换状态，以获得快速且不易受外在环境影响的马达控制响应；首先，根据量测三相电流与利用变频器的切换状态取得马达的三相电压，将其转换至d-q轴静止座标，然后藉此估测马达的磁通量与转矩量，再分别与侦测的定子磁通量和转矩量比较后，得到定子磁通量与转矩量比较的结果，再利用DTC电压向量切换表(DTC Voltage Vector Switching table)，依定子磁通与转矩的比较值及马达所在的角度位置，来选择一个适当的电压向量，进而依切换顺序来激发功率电晶体，达到控制感应马达的目的。

Since the commanded guidance acceleration is achieved by thrust vector control system in midcourse phase, we design two loops flight control system to stabilize the attitude and achieve the guidance command by TVC system.

由於中途导引阶段的导引加速度由推力向量控制(Thrust Vector Control，TVC)系统来达成，因此设计双回路飞行控制系统来稳定姿态并且使推力向量达到导引律的需求。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。