光

In this paper, we have investigated the development of organic-inorganic composite PR material, prepared a new organic-inorganic nanocomposite PR material of PVK-CdS/DMNPAT, characterized every component and tested it photorefractivty by two beam coupling experiment.The work of this paper includes mainly three parts as followed:(1) An azo dye DMNPP was prepared via reoxidation and coincidence reaction and its derivative DMNPAT was prepared by attaching a long methacrylate chain in DMNPP.

本学位论文分析了国内外有机无机复合光折变材料的研究现状，根据目前有机无机纳米复合光折变材料研究中存在的问题，依照有机无机纳米复合光折变材料各功能组分的基本要求设计并制备了PVK-CdS/DMNPAT的有机无机纳米复合光折变材料，对各组分的合成表征以及光折材料的光折变性能做了较系统的研究。

Four laser beams used for ~ 40 K and ~ 87 Rb cooling and repump lights are obtained by using acoustic optic modulators to offset the frequencies from the three external cavity diode lasers.

三台ECDL通过声光调制器产生四束光，分别作为40K和87Rb原子的冷却光和再抽运光，四束不同频率成分的激光分别注入锁定四台从激光器，然后Rb冷却光、K冷却光和K再抽运光再同时注入半导体激光放大器进行放大。

Four laser beams as 40K and 87Rb cooling and repump lights are obtained by using acoustic optic modulators to offset the frequencies from the three ECDL lasers. Four light beams with the different frequencies are injected into four slave lasers for injection locking, then Rb cooling light, K cooling light and K repump light are injected into a semiconductor tapered amplifier in a master oscillator-power configuration.

采用三台外腔光栅反馈半导体激光器、四台注入锁定激光器和一台半导体激光放大器组成激光系统，三台外腔光栅反馈半导体激光器通过声光调制器产生四束光，分别作为40K和87Rb原子的冷却光和再抽运光，四束不同频率成份的激光分别注入锁定四台从激光器，然后Rb cooling光、K cooling光和K repump光再同时注入半导体激光放大器进行放大。

The laser diode system is composed of three external cavity diode lasers and four injection diode lasers and a tapered amplifier. Four laser beams as 40K and 87Rb cooling and repump lights are obtained by using acoustic optic modulators to offset the frequencies from the three ECDL lasers. Four light beams with the different frequencies are injected into four slave lasers for injection locking, then Rb cooling light, K cooling light and K repump light are injected into a semiconductor tapered amplifier in a master oscillator-power configuration.

采用三台外腔光栅反馈半导体激光器、四台注入锁定激光器和一台半导体激光放大器组成激光系统，三台外腔光栅反馈半导体激光器通过声光调制器产生四束光，分别作为40K和87Rb原子的冷却光和再抽运光，四束不同频率成份的激光分别注入锁定四台从激光器，然后Rb cooling光、K cooling光和K repump光再同时注入半导体激光放大器进行放大。

Based on the investigation of the transesterification between dimethyl sebacate and 1,2,2,6,6-pentamethyl-4-piperinol, the synthetic technologies of Tinuvin292 and Tinuvin 765 were established. The two kinds of hindered amine light stabilizers were obtained in the yield of 93.3% and 92.4% respectively and qualified as the advanced level of the kindred overseas products.2. The synthetic technology of Tinuvin123 was studied and established. Using 2,2,6,6-tetramethyl-4-piperinol as the starting material, the product was synthesized successfully through oxidation, free-radical reaction and transesterification in overall yield of 57.6%.

本文研究建立了三个受阻胺类光稳定剂的合成工艺，探索了聚合型受阻胺类光稳定剂生产过程中不溶性副产物产生的原因，并设计、合成了一系列具有抑菌活性的新型受阻胺类光稳定剂。1、在研究癸二酸二甲酯与1，2，2，6，6-五甲基哌啶醇的酯交换反应的基础上，建立了受阻胺类光稳定剂Tinuvin292、Tinuvin765的合成工艺，分别以93.3%和92.4%的收率得到了光稳定剂Tinuvin292、Tinuvin765，所得产品质量达到了国外同类产品的水平。2、研究建立了受阻胺类光稳定剂Tinuvin123的合成工艺。

The synthetic technologies of three hindered amine light stabilizers were established, the reason for the insoluble side products formed in the production of polymerized hindered amine light stabilizers were studied, and a series of novel hindered amine light stabilizers with antibacterial properties were designed and synthesized in this present paper.1. Based on the investigation of the transesterification between dimethyl sebacate and 1,2,2,6,6-pentamethyl-4-piperinol, the synthetic technologies of Tinuvin292 and Tinuvin 765 were established. The two kinds of hindered amine light stabilizers were obtained in the yield of 93.3% and 92.4% respectively and qualified as the advanced level of the kindred overseas products.2. The synthetic technology of Tinuvin123 was studied and established.

本文研究建立了三个受阻胺类光稳定剂的合成工艺，探索了聚合型受阻胺类光稳定剂生产过程中不溶性副产物产生的原因，并设计、合成了一系列具有抑菌活性的新型受阻胺类光稳定剂。1、在研究癸二酸二甲酯与1，2，2，6，6-五甲基哌啶醇的酯交换反应的基础上，建立了受阻胺类光稳定剂Tinuvin292、Tinuvin765的合成工艺，分别以93.3%和92.4%的收率得到了光稳定剂Tinuvin292、Tinuvin765，所得产品质量达到了国外同类产品的水平。2、研究建立了受阻胺类光稳定剂Tinuvin123的合成工艺。

The main business is to deal with a variety of surface materials, including the sand material for blasting (iron grits, ceramic sand, plastic sand etc), polishing material (polishing wax, cloth wheels, polishing powder, polishing liquid, KOYO series),grinding materials (grinding stone, grinding media , brightener),drawing series, cleaning materials (the liquid for removing wax, rust removing, powder for removing oil). we are the distributor of Japan KOYO polishing products in South China,also distribute the other famous brand in the field of surface treatment, such as Japan FUJIMI, RIKEN, NIKKEN,SOKEN,Germany MENZERNA, AMERICAN 3M, AMERICAN MAXI-BLAST, Saint-Gobain of France, South Korea DEER.

主要产品有各种喷涂砂材(铁砂、陶瓷砂、玻璃砂、棕刚玉、金刚砂、白刚玉、塑胶砂、石榴砂、核桃砂、碳化硅、不锈钢丸、钢砂、铸铁丸等)；国产/进口抛光材料(抛光腊、布轮、麻轮、尼龙轮、抛光粉、抛光布、抛光液、KOYO抛磨系列等)；研磨耗材(研磨石、研磨液、光亮剂、润滑剂、平面研磨液、精磨液等)；打磨拉丝材料(打磨片、抛磨片、尼龙辊、尼龙轮、砂纸砂带、百洁布、飞翼轮等)；清洗材料(除蜡水、除锈剂、防锈剂、除油粉、乙丙醇等)以及其它相关表面处理耗材，是日本光阳社KOYO系列抛磨产品中国华南总代理。，代理的其它品牌有日本创研，日本福吉米，日本野牛，日本日研，日本理研，德国名仕，德国赫美斯，美国3M，美国MAXI-BLAST，法国圣戈班，韩国鹿牌等。

If you are a manufacturer, we can save costs for you. If You are a trader, we can create the largest profit space for you.The main business is to deal with a variety of surface materials, including the sand material for blasting (iron grits, ceramic sand, plastic sand etc), polishing material (polishing wax, cloth wheels, polishing powder, polishing liquid, KOYO series),grinding materials (grinding stone, grinding media , brightener),drawing series, cleaning materials (the liquid for removing wax, rust removing, powder for removing oil). we are the distributor of Japan KOYO polishing products in South China,also distribute the other famous brand in the field of surface treatment, such as Japan FUJIMI, RIKEN, NIKKEN,SOKEN,Germany MENZERNA, AMERICAN 3M, AMERICAN MAXI-BLAST, Saint-Gobain of France, South Korea DEER.

主要产品有各种喷涂砂材(铁砂、陶瓷砂、玻璃砂、棕刚玉、金刚砂、白刚玉、塑胶砂、石榴砂、核桃砂、碳化硅、不锈钢丸、钢砂、铸铁丸等)；国产/进口抛光材料(抛光腊、布轮、麻轮、尼龙轮、抛光粉、抛光布、抛光液、KOYO抛磨系列等)；研磨耗材(研磨石、研磨液、光亮剂、润滑剂、平面研磨液、精磨液等)；打磨拉丝材料(打磨片、抛磨片、尼龙辊、尼龙轮、砂纸砂带、百洁布、飞翼轮等)；清洗材料(除蜡水、除锈剂、防锈剂、除油粉、乙丙醇等)以及其它相关表面处理耗材，是日本光阳社KOYO系列抛磨产品中国华南总代理。，代理的其它品牌有日本创研，日本福吉米，日本野牛，日本日研，日本理研，德国名仕，德国赫美斯，美国3M，美国MAXI-BLAST，法国圣戈班，韩国鹿牌等。

As a example, four kinds of switch structures are discussed, numerical results show that the off/on extinction ratio can be less than -90 dB and the dynamic switching range can be less than 0.03 Pc/100, and as an optical stabilizator, the fluctuation of the limiting power level can be less than 10-7Pc.

数值分析表明，级联耦合器作为全光开关，消光比可小于-90 dB，动态开关区可小于3×10-4 Pc；作为光功率稳定器和光学限幅器，其输出光功率起伏可小于10-7 Pc。标签非线性耦合光开关光限幅器 nonlinear coupling optical switch optical limiter

Chromatic plastic film and light conversion film has been applied in protected cultivation, and plastic films with different light quality may serve as a non-chemical approach regulating growth and thermoperiodic responses of plants. A few studies showed that light quality affected growth and yield of strawberry, but little is known about its effects on photosynthesis and chlorophyll fluorescence in strawberry leaves, and fruit quality. So it is beneficial to scientific regulating growth and fruiting for strawberry protected cultivation to study on those effects and the interactions between CO2 and N supply on photosynthesis.

而低氮影响植株生长、叶片黄化，进而影响光合作用，导致抗性减弱和产量品质下降；③CO_2供应问题：目前我国草莓栽培常在设施环境下进行，在封闭性强的设施中空气流通不畅，常导致设施内部CO_2供应不足而影响光合作用，进而影响产量和品质；④光不足与光质问题：设施栽培中，光通过玻璃和塑料棚膜后使设施内的光强与光质均发生改变，这些变化特别是光质变化对草莓生长与结果的影响程度尚无明确认识。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。