查询词典 scan frequency

Taking the nonlinear refraction and the nonlinear absorption into account simultaneously, this paper investigated the diffraction theory model of the Z-scan technique, and analyzed the features of Z-scan curves and their variation rules.

在同时考虑非线性折射和非线性吸收的情况下，借助光的衍射理论，研究了Z-扫描技术的衍射理论模型，分析了非线性折射和非线性吸收同时存在时Z-扫描曲线的形状特征和变化规律。

To fulfill a TV guidance system task of fast recognizing and tracking missile target from sequential images including multiple interferences,a fast segmentation and target characteristic extraction algorithm of sequential images based on binary image index map was proposed.After the sequential images were processed to binary images,a Field Programmable Gate Array was used to scan the binary image once and an index map was built,and then Digital Signal Processing was used to scan the index map once.

针对电视制导系统需从包含多个干扰目标的序列图像中快速识别和跟踪导弹目标的要求，提出了一种基于二值图像索引图的序列图像快速分割及目标特征提取算法，在序列图像二值化后，只需由FPGA对其遍历一次就可得到一张含有目标信息的索引图表，再由DSP对该索引图表边遍历边计算就可得到图像所含目标的数量、面积、质心坐标、二阶矩不变量等特征。

In this article both stereo vision and line2laser scan sensor are integrated to CMM,according to this measuring system the bound2 aries or outlines of object are obtained by stereo vision and the ostensible data of object are achieved by line2laser scan sensor. Information fusion of multi2sensor can be utilized to segment 3D data、to abstract the geometry characteristic of the object、to construct the object modeling.

将立体视觉和线激光扫描传感器集成到三坐标测量机下，由立体视觉来获得物体的边界或轮廓信息、线激光扫描传感器获得物体表面的三维数据，利用多传感器的信息融合技术对三维数据进行分割，提取被测物体的几何特征，并在此基础上构建物体模型。

A CT scan, sometimes also called a CAT scan, takes pictures of the body and uses a computer to put them together.

CT扫描，有时也被称为猫扫描，以图片的身体，并使用一台计算机把他们在一起。

Typically, these are recent imaging methods like CAT scan and PET scan and fMRI which, as I said before, show parts of your brain at work.

通常，这些都是最近的成像方法如猫、功能性核磁共振扫描和扫描，就像我以前说的那样，展示你的大脑在工作。

Select a color depth of 48 bits (3x16 bit), then pre-scan or start the high-resolution scan.

选择48bits(3x16bit)的颜色深度，开始预扫或高分辨率扫描。

Firstly, the relationship of Atomic force and distance is studied. The scan type of samples and the working mode of probe is confirmed, then PZT is chosen as actuator for micro scan displacement, and optical deflexion method is used to detect the deflexion value of cantilever. After all these work, the system light path design is finished, and its mathematical model is completed.

首先，分析了原子力探针系统的中原子力–距离的关系，并确定探针系统的探针的工作模式和样品的扫描模式，从而选择压电陶瓷作为扫描微位移驱动器；采用光学偏转法检测微悬臂偏转量，并选用了PSD作为传感元件，并在此基础上进行了系统光路设计及其数学模型的建立。

Methods B-scan, CT scan and magnetic resonance imaging were used to examine 21 cases of orbital dermoid cyst. The imagings were analyzed.

对21例眼眶皮样囊肿的B超、CT扫描及磁共振成像检查结果进行观察分析。

And the devices'properties and improve the properties to prepare the artificial boundary. The bi-epitaxial YBCO superconducting film with 45°grain boundary in a-b plane was made for the first time in China in this article by magnetic sputtering instrument that was designed and fabricated by ourselves. The x-ray θ～ 2θ scan 、Ф scan、rocking curve、non-symmetry diffraction and SEM、 TEM、AES etc. were utilized in the study.

为此，本工作采用自行设计制造的全金属密封超高真空磁控溅射设备，利用x射线θ～2θ扫描、Ф扫描、摇摆曲线、非对称衍射及SEM、TEM、AES等分析测试手段，在国内首次、也是至今唯一的一家，制得a—b平面内具有45°人工晶界的双外延YBCO超导薄膜，并进而得到双外延晶界Josephson结。

Methods 200 cases (252 knees) of total knee arthroplasty were randomly divided into two groups: Experience group (64 cases): femoral prothesis rotational certification was depended on the palpation of the femoral epicondyle axes combined with Whiteside line in operation. CT scan group (136 cases): femoral prothesis rotational certification was depended on the preoperation CT scan, by which could modulate the lateral rotation angle. The other procedure was same to the standard TKA.

将200例（252膝）TKA患者随机分为两组：①经验组（64例）：TKA术中根据术者触摸外科股骨上髁轴线联合Whiteside线联合确定股骨假体外旋角度；②CT扫描组（136例）：术前CT扫描确定股骨后髁角，术中采用可调外旋定位器复制CT确定的外旋角度，其余TKA手术操作相同。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。