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A new approach by use of an electro-optic aperiodically poled lithium niobate is proposed to realize Q-switch operation of the simultaneous dual-wavelength laser.

利用PPMgO：LN晶体，获得了1571~1679nm范围内的宽带输出。5、提出了一种利用倾斜周期极化晶体非共线光学参量振荡产生宽带光源的新方法。6、提出了一种利用非周期极化铌酸锂晶体电光效应实现双波长激光器调Q的新方案。

A diode array detector was used at 244 nm as the detection wavelength. Arsanilic acid and sulfanilic acid were separated within 3 min.

在优化的色谱条件下，阿散酸和掺假物质对氨基苯磺酸在3 min内实现了基线分离。

Due to the short Fermi electron wavelength of metals, for a successful research of this problem, atomically flat films must be prepared, and their electronic structure, which is atomic-layer sensitive, must be accurately characterized.

由于金属电子的费米波长很短，要观察到显著的量子效应，必须要克服两个难点：既要制备出具有原子级平整度的薄膜，又要对其电子结构进行精确表征。

The molar extinction coefficient, maximum absorption wavelength, reaction rate constants of trans-cis photochemical isomerization, thermal back-isomerization and photochemical back-isomerization and equilibrium constant of photochemical back-isomerization reaction of a novel photochromic liquid crystalline dendrimer G1 of the first generation containing nitroazophenyl groups on its periphery and small molecular azophenyl moiety M1 in solution were described.

张其震*1，盛昕1，李爱香1，王艳2摘要：研究了树外围含12个硝基偶氮苯基元新型一代碳硅烷光致变色液晶树枝状大分子G1和基元小分子M1在溶液中的最大吸收波长、摩尔消光系数、反-顺光化学异构化反应速率常数、热回复异构化反应速率常数、光化学回复异构化反应平衡常数及速率常数。

In vivo chlorophyll fluorescence excitation spectra at 675 nm emission wavelength of six phytoplankton species belonging to dinophyta and bacillariophyta were studied.

研究了甲藻和硅藻两个门类的六种浮游植物在发射波长为675 nm处的活体叶绿素荧光激发光谱。

The results suggested that at the excitation wavelength from 350 to 550 nm, significant differences of Gaussian database presented between dinophyta and bacillariophyta while similar characteristics were found in the same division.

研究发现，在波长为350～550 nm内，甲藻和硅藻的高斯基库特征差异显著，而同门类的高斯基库特征相似，表明高斯分解法为甲藻和硅藻的分类识别提供有效的技术手段。

The results show that the introduction of 2-, 3- and 4- substituent of group leads to a bathochromic shift of position of the maximum absorption wavelength λmax, and also increases the molar extinction coefficient εmax.

2位、 3位和4位引入取代基可使酚类化合物的最大吸收波长λmax发生红移，摩尔消光系数εmax明显提高。

The maximal absorption wavelength of the nitro-stilbene derivatives with an ether bond exhibited approximate 30 to 40 nm bathochromic shift compared to that of nitro-stilbene dyes with an ester bond.

相对于酯键而言，通过醚键连接的对硝基二苯乙烯类分子的最大吸收波长有一个大约30至40 nm的红移现象。

For low molar ratios of Al/Zr, a hypsochromic shift of the initial catalyst absorption band, corresponding to the monomethylation of the catalyst, was observed. Further addition of AlEt2Cl was accompanied by a continuous bathochromic shift of the maximal wavelength corresponding to the formation of more dissociated ionic active species. Then, there would be a coordination of monomer to the ionic active species.

结果表明，无论是AlEt_2Cl还是MAO，少量的助催化剂首先使催化剂发生单烷基化反应，主催化剂金属中心的最大吸收峰波长发生蓝移，而当助催化剂量进一步增加时，金属中心的最大吸收峰波长红移，单烷基取代的催化剂被大量的助催化剂夺去电子成为缺电子的阳离子活性中心，以便烯烃单体的配位插入。

The principle of frequency bathochromic shift used for testing the thermal resistors R(subscript th of Laser Diodes was given. The temperature change △T was obtained indirectly because the temperature change caused the LDs peak wavelength change△λ.

给出了&频率红移法&测量半导体激光二极管热阻R的原理：由于温度变化引起LD峰值波长的变化△λ，间接得到温度变化△T；由注入电功率和输出光功率间接得到热耗散功率。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐