激光

First of all, we review the development of ultrashort pulse-laser technique ,and key techniques to upbuild high-energy ultrashort pulse-laser system and estimate of the techniques are introdused.

本文首先回顾了超短脉冲激光技术发展的历史，分析了目前飞秒激光的现状，并且讨论了建立高功率短脉冲激光装置的关键技术。

It was found that the selective photoreductionreaction of this uranyl compound could take place under pulsed IR laser irradiation and the rate ofphotoreduction depended on the frequency, energy fluence and numbers of pulses of laser.

用TEA-CO_2激光研究了室温下固体的甲酸铀酰钠的红外光化学反应，发现该化合物在脉冲红外激光照射下可产生选择性的光化还原反应，其光化还原率与激光频率、能量密度和脉冲数有关。

Abstract］ objective to assess the efficacy and safety of holmium laser urethrotomy under ureteroscope to treat the urethral stricture.methods 16 cases were treated by holmium laser resection under ureteroscope.the length of the stricture was 0.1～1.0 cm.the blood loss and the complications as well as curative effect after operation were observed.results all of the cases were treated successfully with less bleeding and no severe complications.the maximal urinary flow rate improved obviously after operation.conclusion the holmium laser under ureteroscope demonstrates good effect to treat urethral stricture.

目的 探讨输尿管镜下钬激光切开术治疗尿道狭窄的疗效。方法 16例患者采用经尿道输尿管镜下钬激光切开术治疗，狭窄长度0.1～1.0 cm，观察其术中出血、术后并发症及疗效。结果 16例患者均顺利完成手术，疗效满意，术中出血少，术后最大尿流率较术前有明显改善，无严重并发症发生。结论输尿管镜下钬激光切开术治疗对尿道狭窄是一种安全、微创且行之有效的治疗方法。

The ultrafast laser technology is expanding to new waveband as well as to a less during time.

不断深入的研究工作则要求超短激光技术继续朝着更短的脉冲持续时间和新的激光波段发展，这一般可通过飞秒激光同物质的非线性相互作用得到。

Under the conditions of moderate laser polishing, the zero probability damage threshold of the fused silica chip is increased by 30%, and no negative effect on transmission wavefront is introduced.

结果发现，在中度激光抛光的程度下，其零概率损伤阈值提高了30%左右，且对透射波前没有造成不利影响，从而证明了CO2激光预处理提高熔石英基片抗激光损伤能力的有效性。

Objective :To analysis the distribution, concomitant of the acumination condyloma in anal canal -lower rectum. To evaluate the therapeutic effect of CO2 laser and Nd: YAG laser treatment.

目的：本文用CO2激光和Nd：YAG激光治疗肛管及直肠下端尖锐湿疣，并对分布、伴发部位、激光治疗方法及疗效进行分析。

Since the laser was discovered in 1960, its component, technology and application have been developing at the very high speed, and it has penetrated into all disciplines and the applicatory domain.

自从1960年发现激光以来，激光器件、激光技术及其应用均以极快的速度发展，目前几乎已渗透到所有的学科和应用领域。

Used squared eancroid method for CCD image subdivided locating,discussed on squared cancroid method,and compared it with traditional centroid method, Gauss curvefitting method , and polynomial interpolation method.

介绍了激光三角测距传感器的基本工作原理和激光光斑成像噪声处理的主要方法，将平方加权质心法应用于激光在CCD中成像的细分定位，并与传统质心法、多项式插值法和高斯曲线拟合法进行了较为系统的比较；通过实验表明，平方加权质心法是一种较为理想的细分定位方法，不仅简单、易于实现，而且具有更高的定位精度以及抗噪声的能力。

Used squared cancroid method for CCD image subdivided locating, discussed on squared cancroid method.and compared it with traditional centroid method, Gauss curvefitting method, and polynomial interpolation method.

本文介绍了激光三角测距传感器的基本工作原理和激光光斑成像噪声处理的主要方法，将平方加权质心法应用于激光在CCD中成像的细分定位，并与传统质心法、多项式插值法和高斯曲线拟合法进行了较为系统的比较。

A general laser scanning altimetry equation is developed that describes an ideal system, followed by developing an error model for the laser scanner, and the INS and GPS units. The result is a modified laser equation that contains all errors introduced. The error model is evaluated by analyzing the difference between errorless equation and laser equation with errors.

本文从机载激光扫描测高对地定位的几何模型出发，详细推导了各项误差对机载激光扫描测高对地定位结果的影响关系式；详细分析了不同误差对激光脚点坐标的影响规律，并给出了相应的数值结果和量化指标。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新