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Physical, spectral and laser properties of ytterbium borate and phosphate laser glasses were researched.

制备了掺Yb：硼酸盐和Yb：磷酸盐玻璃，并研究了它们的玻璃物理性质和光谱性质。

In ytterbium borate glass, pumped by 1 W, 940 nm Ti∶sapphire laser 8 mW quasi-cw laser output of 8 mW was obtained.

用波长为976 nm，6 W的LD抽运Yb：磷酸盐玻璃获得了62 mW的连续激光输出，其斜率效率为4.4%。

Enterobacter aerogenes was irradiated by He-Ne laser to optimize the laser mutagenesis condition, and to test the heredity, aciduric and hydrogen-producing potential of the mutant.

运用He-Ne激光辐照产气肠杆菌，对激光诱变参数进行优化，考察了突变株的遗传稳定性、耐酸性和产氢特性。

Enterobacter aerogenes was irradiated by He-Ne laser to optimize the laser mutagenesis condition, and to test the heredity, aciduric and hydrogen-producing potential of the mutant. An aciduric mutant with steady hydrogen-producing capability, which was able to grow at acidic pH of 3.0, was obtained. Its capability of hydrogen production was measured in the batch culture experiment.

闻建平，陈宇，刘铭辉(天津大学化工学院生物工程系，天津300072)摘要：运用He—Ne激光辐照产气肠杆菌，对激光诱变参数进行优化，考察了突变株的遗传稳定性、耐酸性和产氢特性结果筛选到一株遗传性状稳定的高产氢突变株，具有良好的耐酸性，在pH值3.0 时仍能生长。

Methods:In this study, 100 cases of urethra condyloma acumination were recruited: 56 cases were treated with CO 2 laser (group CO 2 laser), while the other 44 cases with 20% peltatin.

10 0例尿道口尖锐湿疣患者，分为治疗组 5 6例，采用CO2 激光治疗；对照组 44例，采用 2 0 %足叶草酯治疗。

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。

Laser Solid Forming was an advanced fabrication technology that developed from Rapid Prototyping technique in 1990s and progressed very fast in the recent years. It has a promising future since a density metal component can be rapidly deposited by laser cladding metal materials additively.

激光立体成形技术是于二十世纪九十年代在快速原型技术的基础上发展起来的一项新的先进的制造技术，该技术采用同步送粉激光熔覆方法沿高度方向逐层堆积金属粉材，从而最终获得三维实体零件。

The present thesis is devoted to studying propagation properties of apertured laser beams confronted in the application of high-power-laser technology.

本论文的目的是针对强激光技术实际应用中遇到的受光阑限制的各种激光束的传输特性进行研究。

The propagation property of apertured laser beams (propagation and control of actual high-power lasers) is a complicated and challenging subject in the field of high-power-laser technology and a frontier subject many researchers devoting to.

受光阑限制光束传输特性(实际强激光的传输与控制)是强激光技术研究领域中面临的具有相当的复杂性和挑战性的课题，也是国际同行们正在努力研究的前沿课题。

The experimental results are shown that the microstructure of QT600-3 by CO_2 laser quenching is Aphanitic Martensite+Graphite,and residual stresses are all compressive,which is above 120 MPa,they increase with laser power.

结果表明：经CO_2激光淬火后QT600-3的显微组织为隐晶马氏体+石墨，残余应力均为压应力，其值在120 MPa以上，且随着功率的增大而增加；相变层深度随着扫描速率和光斑直径的增加而减小，且随着功率的增大而增加；激光淬火后的材料组织结构比较均匀，有利于提高凸轮轴的使用寿命。

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。