激光

In order to improve scan precision of the laser galvanometer scan system, especially when scan area is large, the reasons of graphic distortion are analyzed in this paper when the laser galvanometer scan system is running, and the whole bag of compensating tricks are put forward for every reason of corresponding graphic distortion.

针对如何提高振镜式激光扫描的扫描精度，特别是当扫描区域较大时的精度问题，文中展开了对振镜式激光扫描时图形畸变原因的分析，并对每一种误差产生的原因提出了校正补偿的办法。

The result shows that the power density and scanning speed are two important factors to produce glassy surface layers.

试验结果表明，激光功率密度和激光扫描速度是实现材料表面非晶化的重要条件。

The principle and features of the laser gyro are summarized in this paper.

分析了激光陀螺的工作原理，介绍了激光陀螺的性能特点。

In order to measure jitter of gain-switched laser precisely, we analyze theoretically the math model and measurement principle of harmonic spectrum analysis used to measure laser pulse jitter.

为了能够精确测量增益开关激光脉冲的抖动，应用傅里叶变换和自相关函数，理论分析了谐波频谱分析法测量激光脉冲抖动的数学模型、测量原理，修正了David A。

The transient heat conduction equation is the base of the model.

为讨论激光介质温度、热应力的分布和变化，建立了激光介质热力学计算模型。

Generally considering about the thermophysical performance parameters of the material and the heat reservoir of the laser, a rational numbered model of the laser remelted jet electroforming was build up by using finite element analysis software of ANSYS.

利用ANSYS有限元软件，综合考虑材料的热物理性能参数、激光的热源模型，建立了激光重熔喷射电镀层的数值模型。

To measure the nonlinearity in laser heterodyne interferometer, a novel method to measure the nonlinearity was proposed.

为了精确测量激光外差干涉非线性误差，提出了一种新的激光外差干涉非线性误差测量方法。

The effects of different factors on the laser-induced graft polymerization on the PET surface were analyzed, and the mechanisms were discussed. The factors were: 1 Monomers with smaller molecules resulted in better modification than polymeric monomers. Acrylamide monomer was chosen as hydrophilic modifier finally; 2 Higher concentration of the monomer solution favored the graft reaction; 3 With the increasing laser fluence, the surface hydrophilicity of PET films increased at first, then decreased. More laser pulses led to a more hydrophilic surface; 4 Benzophenone as a photosensitizer hindered the graft polymerization; 5 The homopolymer retardant of ammonium iron sulfate hexahydrate in a proper concentration retarded the formation of homopolymers and promotes the graft copolymerization; 6 The solvent of monomer solution also affected the graft reaction. Different solvents functioned in different ways. Ethanol can promote the graft reaction because of the activity of hydrogen in its structure; 7 pH value of the monomer solution affects the polymerization rate, and a lower pH value was favorable to the graft reaction.

这些影响因素的作用分别为：1小分子单体的表面改性效果好，确定以丙烯酰胺为亲水性改性单体；2较高的单体溶液浓度有利于接枝反应；3激光能量密度增大，薄膜表面亲水性先显著增强，后又减弱；激光脉冲次数越多，改性后表面亲水性越强；4光敏剂BP对PET表面接枝聚合反应有阻碍作用；5适当浓度的均聚物抑制剂六水合硫酸铁铵能减少单体均聚物的生成，促进接枝聚合；6单体溶液的溶剂也影响接枝聚合的反应进程，不同溶剂的影响作用原理不同，含较活泼氢的乙醇能促进接枝反应；7溶液pH值影响单体聚合速率，pH值较低有利于接枝反应。

So our work is of theoretical and practical significance not only to study of a high power laser beam quality and stability, but also to development of the laser.

因此，我们的工作不仅对于当前高能激光光束质量及稳定性研究乃至以后的高能激光的发展具有理论和实际意义。

With the high speed development of Information and Computer Technology, it will become one new trend to apply the technology of USB in medical laser film printer.This paper is organized as follows.

随着信息技术和计算机技术的飞速发展，医用激光胶片打印机也不断地采用新的技术，并具有广阔的发展前景，通用串行总线技术在激光打印机中的应用将成为一种新的趋势。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。