Studies of Nd:YAG laser using a Fabry-Perot band-pass filter as output mirror

Nd:YAG晶体因为优越的光学性能和机械性能而得到最广泛的使用。室温下Nd:YAG晶体4F3/2—4I11/2能级跃迁产生的荧光谱线有多个发射峰。本文主要研究了以Fabry-Perot带通滤光片(FPF)作为[111]切割Nd:YAG激光器的输出镜，得到小受激发射截面激光的输出。实验结果获得了1123nm线偏振激光和1074nm激光输出，采用[100］切割Cr^(4+):YAG调Q晶体，获得了对应的脉冲激光输出，研究了被动调Q晶体方位对激光输出特性的影响；总结了作为固体激光器输出镜的Fabry-Perot带通滤光片的设计原则。 单纵模被动调Q激光器因为其优异的输出特性，在许多领域具有广泛的应...Nd:YAG crystal is the most widely-used laser gain medium because of its excellent optical characteristics and mechanical properties. Typical room temperature emission spectrum for 4F3/2 – 4I11/2 transition of a Nd:YAG crystal shows that there are many emission bands. In this thesis, we used a Fabry-Perot band-pass filter as the output mirror of a [111]-cut Nd:YAG laser and obtain the laser with sm...学位：工学硕士院系专业：信息科学与技术学院_光学工程学号：2312012115289

Anatomical and Histological Studies on the Male Reproductive System of Thenus orientalis

【中文摘要】 东方扁虾雄性生殖系统由精巢、输精管及雄性生殖孔三部分组成 ,输精管可分为前、中、后三段。精巢由卷绕的前、后收集管及挂靠其上的许多生精腺囊所组成。同一腺囊内的精细胞发生基本同步 ,而不同腺囊内则可以不同步。收集管的主要功能是将精细胞团输送至输精管。精荚在输精管内运行时一直进行着精子的形成过程 ,直至精子成熟。位于输精管末段环肌层外的索带状细胞团被认为是造雄腺 【英文摘要】 The male reproductive system of Thenus orientalis is composed of paired testes, vas deferens and male gonopores. The vas deferens can be separated visually into the anterior, medial, and posterior segment. The testes are composed of multi\|convoluted anterior and posterior collecting tubules bearing numerous spermatogenic acini. Stages of spermatocyte development within the acini vary throughout the testis; however spermatogenesis within each acinus is usually synchronous. The main function of collectin..

Observations on the embryonic development of Thenus orientalis

【中文摘要】 东方扁虾的胚胎发育包括以下九个阶段：卵裂期、囊胚期、原肠胚期、卵内无节幼体期、五对附肢期、胸部附肢发生期、复眼色素形成期、近孵化期和孵化期。东方扁虾胚胎复眼的色素斑随胚胎发育的进程而增大。与日本龙虾和中国龙虾不同的是，东方扁虾整个胚胎发育期未能观察到第一颚足。 【英文摘要】 The embryonic development of 7bans orientalis can be devided into nine stages: cleavage, blastula, gastrula, egg-nauplius, embryo with 5 pairs of appendage rudiments, embryo with thoracic appendages (or appendage rudiments, embryo with compound eye pigments forming, embryo nearly ready to hatch and the stage of hatch. The size of pigmental spots of embryonic compound eyes increase with the embryonic development. The lst maxilliped can' t be observed during the period of embryonic development in T. orientali..

The development of aquatic feed industry and aquatic feed disciplines in Fujian province

水产养殖业的迅速发展带动了水产饲料业的进步。福建省水产饲料业经过近30年的稳步发展,饲料研发能力、产品产量与质量等均有较大的提高。本文概述了福建省水产饲料业的崛起与学科建设,指出了福建省水产饲料学科建设的重点发展方向。The rapid development of aquaculture had promoted great development and improvement of aquatic feed industry.The aquatic formulated feed research and development capabilities,aquatic feed yield and quality had greatly increased after nearly 30 years of steady development of Fujian aquatic feed industry.This paper expounded the development of Fujian aquatic feed industry and aquatic feed disciplines,and proposed the development direction of aquatic feed disciplines in Fujian province.福建省科技重大专项“环境友好型饲料关键技术集成及其产业化开发”(2010NZ0002-2);厦门市集美区科技创新重点项目(350211Z20103B01)部分资

Study on the Chromosome of the Squat Lobster, Thenus orientalis(lund)

【中文摘要】 以精巢为材料 ,以气干法制片、Giemsa染色对东方扁虾的染色体进行了研究 .结果表明 :东方扁虾染色体数是 n=1 2 4 ,2 n=2 4 8.还对东方扁虾精原细胞的核型进行了初步的分析 ,未能发现异形的性染色体 【英文摘要】 The chromosome of the squat lobster, T. orientalis, was studies in preparation of testis, obtained by airdry method. The chromosome number forT. orientalis is 2n=248, n=124. The karyotype from mitotic metaphase of spermatogonium in the squat lobster was analysed preliminarily. No sexchromosome of heteromorphism was observed.福建省自然科学基金资助项目(C9810006

Effect of different tillage management measures on rainfall infiltration of slope farmland

利用人工模拟降雨试验,研究了不同耕作管理措施对坡耕地降雨入渗的影响,并采用有限差分法对入渗过程进行了数值模拟。结果表明,土壤入渗速率的计算值与实测值吻合较好,且耕作管理措施可明显增加坡面土壤的水分入渗,在相同入渗时间情况下,土壤稳渗速率大小排序为等高耕作>人工掏挖>人工锄耕>直线坡,在中小坡度和中小雨强条件下,这种特征表现更为显著

Preliminary Study on the Temperature—specific Rates of Embryonic Development of the Flathead Lobster Thenus orientalis (Lund.)

【中文摘要】 从抱卵雌虾腹部剥离的东方扁虾(Thenus orientalis Lund,1793)胚胎在四组恒温水浴(22℃±0.2℃,25℃±0.2℃,28℃±0.2℃,31℃±0.2℃)下进行的离体培养孵化实验取得成功.通过监测以胚胎眼指数来指示胚胎发育进程,建立了四组温度下眼指数对时间的直线回归图。在此基础上,确立了单位时间内眼指数增长值与培养温度之间的线性关系,用于预报不同温度下胚胎的孵化日期.此外,还结合亲虾抱卵孵化实验和自然水温下离体孵化实验的结果探讨了东方扁虾胚胎孵育机制及复眼形成期发育所需要的有效积温。 【英文摘要】 The embryos stripped from the pleopods of the berried Thenus orientalis (Lund. ) are incubated in vitro at four constant temperatures (22℃± 0. 2℃, 25℃±0. 2℃, 28℃±0. 2℃ and 31℃±0. 2℃) and the rates of development of the embryos of each group are monitored by measuring embryonic eye index (EI) according to Perkins. We have established the regression lines of EI related to time at four temperatures, and find that the relationship between the increase of EI per unit time and the incubating temperatures is also ..

SPERM ULTRASTRUCTURE OF THE SQUAT LOBSTER, Thenus orientalis (Crustacea,Decapoda)

利用电镜研究了东方扁虾 (Thenusorientalis)精子的形态和结构。精子由核、膜复合物区和顶体区 3部分组成。核内含非浓缩的染色质、微管及细纤维丝 ,外被核膜 ;5～ 6条辐射臂自核部位伸出 ,臂内充满微管。膜复合物区位于核与顶体之间 ,由许多膜片层结构及其衍生的囊泡共同组成。顶体区由顶体囊和围顶体物质组成 ,顶体结构复杂 ,由顶体帽、内顶体物质和外顶体物质等构成 ;围顶体物质呈细颗粒状 ,主要分布于顶体囊侧面。还就龙虾总科精子顶体反应的模式进行了讨论。Morphology and ultrastructure of mature sperm of Thenus orientalis were studied with electron microscopy.Each sperm comprises a nucleus,membrane complex area and acrosomal region.The nucleus limited by a nuclear envelope contains uncondensed chromatin,microtubules and filaments.Five to six radial arms extend from the nucleus,and are stationary as well as packed with microtubules.The membrane complex area,which lies between the nucleus and the acrosomal region,contains numerous lamellar membrane structure and vesicle which originate from the lamellar membrane structure.The acrosomal region includes acrosomal vesicle and periacrosomal material.The acrosome is structurally complex and comprised of acrosomal cap,inner and outer acrosomal material.The periacrosomal material is finely granular with most of it lying at the sides of the acrosomal vesicle.The mode of acrosome reaction of Palinura sperm was also discussed in this paper

ULTRASTRUCTURE OF OOGENESIS IN THENUS ORIENTALIS

【中文摘要】 根据卵细胞的形态、内部结构特征及卵母细胞与滤泡细胞之间的关系,东方扁虾的卵子发生可划分为卵原细胞、卵黄发生前卵母细胞、卵黄发生卵母细胞和成熟卵母细胞等四个时期。卵原细胞胞质稀少,胞器以滑面内质网为主。卵黄发生前卵母细胞核明显膨大,特称为生发泡;在靠近核外膜的胞质中可观察到核仁外排物。卵黄发生卵母细胞逐渐为滤泡细胞所包围;卵黄合成旺盛,胞质中因而形成并积累了越来越多的卵黄粒。东方扁虾卵母细胞的卵黄发生是二源的。游离型核糖体率先参与内源性卵黄合成形成无膜卵黄粒。粗面内质网是内源性卵黄形成的主要胞器。滑面内质网、线粒体和溶酶体以多种方式活跃地参与卵黄粒形成。卵周隙内的外源性物质有两个来源:滤泡细胞的合成产物和血淋巴携带、转运的卵黄蛋白前体物。这些外源性物质主要通过质膜的微吞饮作用和微绒毛的吸收作用这两种方式进入卵母细胞,进而形成外源性卵黄。内源性和外源性的卵黄物质共同参与成熟卵母细胞中富含髓样小体的卵黄粒的形成。卵壳的形成和微绒毛的回缩被认为是东方扁虾卵母细胞成熟的形态学标志。 【英文摘要】 Oogenesis and oocyte vitellogenesis in the flathead lobster Thenus orientalis were observed in detail by transmission electron microscopy.According to the shape and size of ootids,ultrastructural changes of nucleus and cytoplasm,vitelline accumulation and the relationship between oocytes and follicle cells,the oogenesis of T.orientalis could be divided into four stages,i.e.oogonia, previtellogenic oocytes,vitellogenic oocytes and mature oocytes.Besides a large and oval nucleus,the oogonia mainly contain ves...福建省科技重中之重项目(海洋生物优良种质和生物活性物质的应用基础研究)资

Culture of Phyllosomas of Spiny Lobster

【中文摘要】 简要回顾了龙虾类叶状幼体培养研究的历史,着重综述了影响叶状幼体培养成功的因素,并就实现叶状幼体群体培养的可能途径进行了初步的探讨. 【英文摘要】 In this paper, the culturing history of phyllosoma is reviewed briefly,the factors important to the successful culture of phyllosoma are stressed intensively, and the probable methods for mass culture of phyllosoma are also discussed preliminarily