查询词典 vector density

DsRNA technology was discovered recently, and many studies demonstrated that it could suppress genes more effectively than antisense technology. Inverted repeats of 800 bp TCS cDNA fragments sandwiching a 400 bp GUS gene fragment was inserted into the binary vector pBI121 and placed under the control of 35S promoter, forming a dsRNA expression vector.

DsRNA技术是近几年才刚刚发展起来的新技术，将上述DNA片段正向和反向插入到双元载体pBI121的35S启动子下游，两片段之间由约400 bp的GUS基因片段隔开，形成反向重复序列，由此构建成了表达TCS基因dsRNA的中间表达载体。

The superposing method of vector and image information is especially discussed and studied, and the problems of precision influence apon images grouping because of multi-origin data are analyzed, and the designing principle and realizing methods of GIS vector and image database are elucidated.

特别探讨和研究了矢量信息与图像信息复合方法，分析了多源信息的参与对图像分类精度的影响问题；并阐述了GIS矢量数据库和图像数据库的设计原则与实现方法。

Then the DTC theory of PMSM and the voltage vector table are analyzed. A new DTC scheme for PMSM is proposed in this paper, which is based on the area voltage vector. And the paper offers the available modulation algorithm between torque and flux.

拓展了一种基于区域电压矢量表的新型控制策略用于永磁同步电机直接转矩控制，并给出了转矩、磁链作用分量协调可控的电压矢量选取调制算法，基于理论分析和MatLab6。

In this equation, A is the area normal vector of face f directed from cell c0 to c1, ds is the distance between the cell centroids, and ~es is the unit normal vector in this direction.

在这个方程中A是从单元格c0 指向单元格c1 的表面f的标准向量围成的面积，ds 是两个单元格重心间的距离， s 是这个方向的单元向量。

For the complexity of face detection environment, this paper proposes a face detection algorithm which based on skin color and support vector machines .for color picture of face which has complex background information, the algorithm uses skin color detection to divide area of skin color ,and to wipe off the noise interference, then do further examination for the same area of skin color and confirm the face area used by support vector machines.

针对人脸检测环境的复杂性，该文提出了基于肤色和支持向量机的人脸检测算法。该算法对于具有复杂背景信息的人脸彩色图像，采用肤色检测的方法进行肤色区域的分割并去除噪声干扰，然后使用支持向量机对于类似肤色区域进一步检测并确定人脸区域。

By employing coordinate transformation, the overall generalized displacement vector relevant to the motion of pad and axle journal is converted into axle journal displacement vector in a local motion coordinate system, and the oil film force in a partial motion coordinate system is obtained by solving the dynamic characters of a fixed bush bearing.

通过坐标变换，将瓦块和轴颈运动相关的全局广义位移矢量转换为局部动坐标系下轴颈的位移矢量；利用求解固定瓦轴承动力特性的方法求得的局部动坐标系下的油膜力。

Use pCR2.1-TOPO and pCR2.1-Blunt II TOPO vectors as models, we investigated the possibility to use TOPO T/A vector (pCR2.1-TOPO) to clone blunt-ended PCR product and to use TOPO blunt vector (PCR-Blunt II TOPO) to clone 3'-A PCR product.

以pCR2.1-TOPO与pCR2.1-Blunt II TOPO载体为模型，我们研究了利用TOPO T/A载体（pCR2.1-TOPO）克隆平端PCR产物与利用TOPO 平端载体（pCR2.1-Blunt II）克隆3'-A末端PCR产物的可能性。

The performance of the vector modulator is proved by experimental results. In addition, applications of the vector modulator in practical systems such as adaptive antenna array are presented, with its calibration method to improve carrier and sideband suppression.

最后给出了矢量调制器的测试结果和它在自适应天线阵等实际系统中的应用情况，并讨论了用于提高载波和边带抑制、满足高精度要求的校准方法。

Result: Restriction enzyme analysis proved that cloning vector pEGFP-RECK was successfully constructed, and the sequencing results of it was in accord with expected. By transfecting the pEGFP-RECK vector into SHG44 cells, we could see the protein locate mainly in cell plasm.

结果：所得RECK基因融合蛋白表达载体序列与预期相符。pEGFP-RECK表达质粒转染SHG44细胞后，荧光信号主要集中在与细胞质有关的部位。

The important parameters of designed flutes, such as rake angle, clearance angle, are analyzed, and the calculating method of tangential vector, normal vector, and so on, is discussed.

基于刀刃曲线模型和刀槽螺旋面的生成原理，提出了可满足各种设计要求的刀槽螺旋面的几何建模方法，推导了铣刀和旋转锉的多种类型的刀槽螺旋面方程。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。