查询词典 laser

Results: Porphyrin nitrogen mustard (5 μg/ml ) decreased the D value of human liver cancer cell line SMMC7721. The activity of LDH was increased after laser irradiation. The3H-TdR of human liver cancer cells was decreased with or without laser.

结果：卟啉氮芥(5μg/ml，培养1h)可使人肝癌细胞SMMC7721D值明显降低、经光激发可使培养上清LDH活性显著升高；可使体外培养人肝癌细胞SMMC7721的3H-TdR掺入量显著下降、经光激发可使体外培养人肝癌细胞SMMC7721的3H-TdR掺入量进一步显著下降。

Objective To study the effect of laser prostatectomy for benign hypertrophy of prostate by transurethral noncontact laser ablation.

目的 分析激光切除前列腺治疗前列腺增生症的临床疗效及并发症的防治。

Laser plasma interaction is a typical nonlinear problem and one of the key issues in laser fusion.

激光等离子体相互作用是一个典型的非线性问题，是激光聚变研究的核心问题之一。

Laser processing technology research,laser cutting metal and nonmetal business.

激光材料加工技术研究，对外承揽激光切割金属和非金属业务。

Firstly,3D point clouds produced by 3D laser scanner are converted into polygon mesh.Then,normal vectors and areas of every polygon mesh are computed and some candidate regions are obtained using region dilation strategy.Finally,the 3D laser scanning data is segmented into regions of similar orientation after the elimination of the insignificant regions.

首先将三维扫描表面数据转化为三维网格模型；然后利用同一区域中相邻网格具有相似法线方向这一性质，使用区域膨胀策略生成若干获选表面区域；最后通过去除候选区域中的噪声区域得到最终表面区域分割结果。

A general Godunov finite difference schemes-WENO (Weighted Essentially Non-Oscillatory) schemes which have fifth-order accuracy is used to perform a numerical calculation for 2-dimensional axis symmetrical laser-supported plasma flow field under laser ablated solid target.

采用具有五阶精度的WENO差分格式和简易等离子体状态方程模型对激光与等离子体相互作用的复杂物理过程进行了数值计算，分析了激光束能量在等离子体区中的吸收、屏蔽效应等动态耦合规律以及激光支持等离子体前驱冲击波传播。

Its R/W device has a single laser source and a single object lens. The wavelength of laser source and the numerical aperture of object lens are between those of CD and DVD or same as those of CD.

此种光学记录媒体的读写装置具有单一激光光源以及单一物镜，激光光源的波长和物镜的数值孔径介于CD与DVD规格之间，或与CD规格相同。

As one part of the project, the dissertation is developed with thelocalization problem in mobile robot navigation. Combined with "MobileRobot 1 of Central South university (MORCS-1)", a mobile robot designed byus that equipped with a 2D laser measurement system to sense the environmentand the proprioceptive sensors such as the odometry, gyroscope to calculate itsdead reckoning, the approach about the four kind uncertainty factors of mobilerobot localization is studied. These researches include that the error analysisand calibration of position sensors is implemented to reduce the measurementnoise, the 3D kinematic model of mobile robot is built to gain the accuratepose in complex terrain, some work on the automatic detection of static ordynamic obstacles based on laser scanner is investigated to eliminate thedynamic influence of the environment and to realize the reliably absoluteposition, and lastly a robust algorithm is presented to involve the incrementalenvironment mapping and self-localization of mobile robot with unknown dataassociation and to improve the self-localization performance of mobile robotunder unknown environment.

作为该项目研究的一部分，本论文以移动机器人导航中的定位问题为研究内容，利用自行研制的装配有二维激光雷达环境感知系统，并通过里程计、陀螺仪等内部传感器来实现航迹推测的移动机器人"中南移动1号MORCS-1"，重点围绕影响移动机器人系统定位的四类不确定性处理展开研究：通过移动机器人定位传感器的误差分析及校准，旨在消除传感器噪声所带来的测量误差；通过建立移动机器人的三维运动学模型进行航迹推测，以期实现复杂地形下精确的移动机器人本体姿态感受；通过基于激光雷达的动静态障碍的自主检测等相关研究，尽量消除环境的不确定因素影响进而实现可靠的移动机器人绝对定位；通过以上研究，针对未知数据关联下移动机器人增量式环境建图与自定位的研究提出一种鲁棒的滤波算法，改善未知环境中移动机器人自定位的性能。

A new scheme for laser beam focus position error compensation is proposed, In this scheme, a decomposing compensation scheme, the compensation action along laser beam is decomposed to three orthogonal straight-line coordinates: X、Y、Z, without extra actuator.

论文提出了一种新的激光焦点位置误差补偿方案，该方案不需要专门的执行机构，而是将激光聚焦头沿着光轴方向的补偿运动分解到机床的X、Y、Z三个直线运动座标上，称为分解补偿方案。

A new green laser is designed for use in the operating room by otologists for otosclerosis and by ophthalmologists for retinal photocoagulation, which will allow hospitals to use one standard laser platform across specialties.

一种新型绿色激光被设计用于在手术室由耳科医生使用来治疗耳硬化症，以及眼科医生用于视网膜激光凝固治疗，这就使得医院跨学科使用一套标准激光平台。

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。