用光

Nanometer praseodymium and iron doped TiO2 powder was obtained from tetrabutyl titanate by sol-gel method.

以钛酸丁酯为原料，用溶胶-凝胶法制备了掺杂镨和铁的纳米TiO2粉末，采用X光衍射仪对粉体的物相进行了表征。

A specially designed prismoid that generates interference of four beams with binary symmetry is fabricated and optical interference field is observed with an optical microscope.

实验上用光学显微镜拍摄了双模结构的光场分布。

The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.

摘 要：以腐叶土为培养基质，对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究，结果表明：①不同时期播种的同种蕨类的孢子，发育出原叶体和幼孢子体所历经的时间长短不同；②孢子萌发和配子体生长发育的适宜温度约为 15 ～ 24 ℃；③稀有蕨类的孢子萌发率低，而在野外能形成较大种群的蕨类的孢子萌发率高；④用 GA 3 处理孢子可以促进萌发；⑤当原叶体上长出幼孢子体时，原叶体由大变小，由绿变黄， 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失；⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同；⑦孢子萌发需要光；⑧ 1 片原叶体尽管有多个颈卵器，但仅发育出 1 株幼孢子体；⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。

Given other certain parmeters,the effect of quintic nonlinearity on the chirp of the Gaussian pulse and soliton was considered and compared.

在波分复用系统中，由于一根光纤可以传输多路光脉冲，因此，WDM是当前光纤通讯领域研究的主流技术。

This experiment investigate the expression of TGF- B1 and bFGF in the rabbet corneas to find whether such expression contribute to the corneal wound healing after PRK; and compare the effects of mechanical deepithelialization with chemical deepithelialization PRK on the corneal wound healing.

裂隙灯显微镜下观察角膜Haze及角膜上皮愈合、水肿消退的情况；光镜下观察角膜组织病理学变化并计数不同时间点角膜基质浅层角膜细胞数量的变化；用逆转录-PCR法及免疫组化法检测正常对照组及PRK手术组术后1天、1周、1月、3月不同时点角膜TGF—β1和bFGF的表达情况。

The techniques of optical beam induced current have found wide-spread applications in characterizing many semiconductor and optoelectronic devices. A two-photon confocal microscope is adapted for investigating the dynamics of light emitting devices through the contrast mechanisms of two-photon DC and radio frequency optical beam induced current.

摘要 光致电流的技术至今已经广泛的被应用在检测半导体特性以及光学元件上，共焦显微镜搭配双光子激发技术相当适合用来检测LED元件，与单光子激发相较之下，利用脉冲雷射双光子激发术可以使用光子能量小於能隙的长波长光源来完成激发，并且具有高度的空间解析度。

Interventional radiology is the performance of medical procedures with the guidance of imaging technologies. The acquisition of medical imaging is usually carried out by the radiographer or radiologic technologist.

此外，各种检查工具针对不同的部位或器官，更发展出很多特别的应用方式，如心导管检查或各器官的血管摄影即是利用在血管内注射显影剂，再用X光原理显像以进行诊断。

A new method for planar curves has been developed. Curvature signal is decomposed with wavelet at first, and then select interpolative dots by altering pace, which is used to construct a G2 continuous rational cubic Bezier spline curve.

给出了一种先对初始曲率进行小波分解，再用变步长的方法选取待插值点，最后利用C^2连续的三次有理Bezier样条插值重建出光顺的平面曲线的方法。

Hit me with your rays of light.

用你们的光射线打我。

There's nothing more you can learn from pain, but here it comes again—with its monotone, its idiot drone, like a brick wall against which thinking smacks its big skull until it's juiceless fruit the devil reams clean with red teeth and razor-blade tongue.

你已经痛苦至极但它又来了——伴随着单调声响，和愚蠢的嗡营，像一堵砖墙靠着它，思想击打自己硕大头骨直至自己无汁的果实被魔鬼用红牙齿和剃刀片的舌头榨光。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。