10 resultados para 1960-1962
em Chinese Academy of Sciences Institutional Repositories Grid Portal
Resumo:
We report the experimental results of a mode-locked diode-end-pumped Nd:YAG laser with a semiconductor saturable absorber mirror (SESAM) from which we achieved a 10 ps pulse duration at 150 MHz repetition rate. The SESAM was grown by metal organic chemical vapour deposition at low temperature. The recovery time was measured to be 0.5 ps, indicating the potential pulse compression to sub-picoseconds.
Resumo:
本文根据中国科学院海洋生物标本馆(MBMCAS)所收藏的砂海星科标本对中国海砂海星科进行了系统分类学研究。研究材料包括中国科学院海洋研究所等单位进行的北黄海西部和渤海综合调查(1957-1958),全国海洋综合调查(1958-1960),中越北部湾海洋综合调查(1959-1960,1962)等获得的大量标本。文中以传统的形态分类学方法为主,结合现代分类学的手段和方法准确鉴定了中国海砂海星科的疑难种类,搞清了中国海砂海星科的种类组成及分类上存在的问题,并进行了地理分布和分类区系研究。 文中共记述中国海砂海星科1属9种,包括2新种,详细描述了各种的形态特征、地理分布,并讨论了它们在分类学研究中存在的问题,提供了各种的形态结构图、地理分布图和中国海砂海星科种的分类检索表。地理分布和分类区系研究结果表明,中国海砂海星科有3种广布于印度-西太平洋海域,有4种仅发现于中国海域,5种在日本近海也有分布,区系分布与日本近海有着较大的相似性。 该研究对中国海砂海星科作了全面的系统分类学研究,改变了中国海砂海星科研究的混乱局面,为中国动物志编写,生物多样性监测、评估与保护,砂海星科资源的综合研究和利用积累了有用资料。
Resumo:
<正> 1961年5至10月,岳佐和及黄宏金参加了中国科学院的西藏综合考察队,在西藏南部地区进行了鱼类学考察。1962年又在北京进行了鱼类种类的鉴定及资料整理工作。本文继《西藏鱼类初篇》(张春霖等,1962)之后,仅报告该地区的条鳅属(Nemachilus)鱼类,共六种,其中腹纹条鳅(N.bellibarus,sp.nov.)为一新种,斯氏条鳅(N.stoliczkae Steind.)为1960年张迺治等同志所采。
Resumo:
分析汕头气象站1960-2005年500hPa高度的气候变化特征,得出存在年际和年代
Resumo:
Dilution incubations and Calanus sinicus addition incubations were simultaneously conducted at five stations in the Yellow Sea in June of 2004 to evaluate the impact of microzooplankton and Calanus sinicus on phytoplankton based on the Chlorophyll a (Chl-a) levels. The Chl-a growth rates (k) ranged from 0.60-1.67 d(-1), while microzooplankton grazed the Chl-a at rates (g) of 0.29-0.62 d(t-1). The addition of C. sinicus enhanced the Chl-a growth rate (Z) by 0.004-0.037 d(-1) ind.(-1) L. C. sinicus abundance ranged from 84.1-160.9 ind. m(-3), which occupied 90.7%-99.1% of the copepod (> 500 mu m) population. The in-situ increase in phytoplankton by C. sinicus community was estimated to be 0.000 4-0.005 9 d(-1). These results showed that microzooplankton were the main grazers of phytoplankton, while C. sinicus induced a slight increase in the levels of phytoplankton.