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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。

A new digital measure method was presented based on the three coordinate measuring machines. Compensation of sensor radius, establish part's measure reference frame, the best measuring layout and mix programmed scanning all those not only enhance measure precision and increase efficiency of scanning measure, but also the data can image geometrical characteristic of complex surface. The method was illuminate by a sample, and the digital data of the surface adumbration are obtained at last

在三坐标测量机的基础上给出了一种数字化测量曲面轮廓的方法,通过测球半径的补偿、坐标系的建立、最佳测量路径的规划以及混合编程扫描,提高了测量精度及扫描测量的效率,而且采集到的数据可以反映曲面的几何特征,并以实例对该方法进行说明,得到了数字化的曲面轮廓数据。

Materials and Methods 6 patients of abdominal viscera internal organs aneurism were collected and received routine MR abdomen scan ,then Propeller LAVA and blood vessel imagery, Processing original image with VR and MIP to reconstruct artery.

材料和方法搜集腹腔内脏动脉瘤患者6例,常规腹部MR扫描,三维容积超快速多期动态增强扫描序列血管成像,采用容积再现及最大强度投影进行动脉重建。

The results show, when the prism wedge angle is 4°, the transmitted laser beam changes about 1 μrad as the prism rotates 1′; when the small angle deviation on one side of the minimum deviation angle of each prism is controlled, the scanning range of laser beam in the horizontal and vertical direction is not less than 500 μrad, and the scanning precision of the device is superior to 0.2 μrad.

结果表明:取棱镜棱角α为4°时,棱镜每旋转1′,透射光束变化约1 μrad;分别控制双棱镜在其最小偏向角一侧小角度偏转,可以实现光束在水平方向和垂直方向500 μrad范围内的精确扫描,装置的扫描精度可以达到0.2 μrad。

The pulse width broadening of the femtosecond laser after angular dispersion wasdescribed,the pulse width expression at arbitrary propagation distance was provided,the pulse width broadening of the femtosecond laser by AOD was precisely predicted,thegeneral theory on pulse width broadening of plane wave,spherical wave and Gaussianbeam was deduced and the physical mechanism of pulse width broadening based on eachabove light beam model was revealed.

本文对随机扫描双光子显微镜中飞秒激光传输特性进行了系统深入的研究,完整解决了这一理论问题,发现了空间与时间色散通过角色散耦合的规律,为空间与时间色散同时补偿的方案提供了理论依据,基于此原理的单个角色散器件同时补偿空间和时间色散的方案高效解决了声光偏转器的色散补偿这一核心难题,为建立随机扫描双光子显微成像装置并应用于神经学研究奠定了基础:阐明了飞秒激光经角色散后的光斑展宽规律,获得任意传输距离处的光斑解析式,精确预测了声光偏转器对飞秒激光的光斑展宽,并揭示了光斑展宽的物理机制。

Results 3 cases was missed diagnosing in X ray exam.2 cases was missed in normal CT scan.every cases was displayed well in quasi scan.So quasi scan has great advantages in fracture fracture of joint,especially in anklebone.

结果:X线片诊断漏诊3例,常规轴位CT扫描漏诊2例,踝关节准冠状位CT扫描对20例骨折均显示良好,尤其对涉及关节面的骨折及有合并跟骨骨折者有明显优势。

Ray exam.2 cases was missed in normal CT scan.every cases was displayed well in quasi scan.So quasi scan has great advantages in fracture fracture of joint,especially in anklebone.

结果:X线片诊断漏诊3例,常规轴位CT扫描漏诊2例,踝关节准冠状位CT扫描对20例骨折均显示良好,尤其对涉及关节面的骨折及有合并跟骨骨折者有明显优势。

When scanning, from light transmitter beams shines on the bar code on the basis of the photoelectric detector from bar code on the binvalidation of the reflected light intensity to respond to that, when scanning a white spot sweep to the surface or in two in the space between the black line, the reflection of light intensity, high current output a detector; when the scan-to-black lines, reflected light, detector output UN-effectual, on the basis of narrow-striped width or length of time made in response to changes in light and shade with bar code and converted to a little different current signal, after a post to the bezze codec.

扫描时,从平发射器发不入的平束照在条码上时,平电检测器根据平束从条形码上不直射返来的平不不弱度息不入回答,当扫描平不背扫到白纸背上或处于两条暗线之间的空缺处时,不直射平不不弱,检测器输不入一个不小电流;当扫描至暗线条洋时,不直射平不弱,检测器输不入小电流,并根据暗线宽或广息不入工夫不幼短差别的反响,随着条形码明暗的改变变化为人小差别的电流暗记,经过放不小后运输到泽码器洋去。

Program according to a certain frequency of scan lines with lowlevel circulation lines, while testing out the state line, once the judge has said there is a classified as lowkey is pressed, stop the scan and to maintain the current lineline state, and then read out line state to get the current keys key codes to wait for key popstart the scanning process, waiting for the next key.

程序按一定的频率用低电平循环扫描行线,同时检测列线的状态,一旦判断有一列为低则表示有键被按下,停止扫描并保持当前行线的状态,再读取列线的状态从而得到当前按键的键码;等待按键弹起:检测到各列线都变成高点平后,重新开始扫描过程,等待下一次按键。

Use light transmitter plate, by laser beam scanning and imaging, Business card printing and membership card to make a microscanning time, every time the business card printing and membership card production, at the time of the formation of submarine-like rescanning the elimination, form a new submarine-like.

该机拔取平导体版材,堵住激平束扫描不败像,制卡和会员卡制息一次扫描不败像一次,屡屡制卡和会员卡制息后,后次形不败的不浮像即打消,需重陈扫描形不败陈的不浮像。

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