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Preliminary study on seasonal succession and development pathway of phytoplankton community in the Bohai Sea

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Acta Oceanologica Sinica 2001年第2期20卷 251-260页

作者： Sun Jun, Liu Dongyan, qian Shuben (1. Marine Ecosystem Dynamic Lab, Marine Life Science College, Ocean University of Qingdao, Qingdao 266003, China. ) Marine Ecosystem Dynamic Lab Marine Life Science College Ocean University of Qingdao Qingdao 266003 China

Phytoplankton species composition and species succession were determined in 1.98-1.99 based on 2 nestle investigation cruises in the Bohai Sea and two monthly monitoring stations at Penglai and Changdao for 1. months. The seasonal succession and pathway of phytoplankton community in the Bohai Sea were discussed complementarily with history data. The main process of Phytoplankton community development in the Bohai Sea was controlled by temperature and nutrient replenishes. There were two cell abundance peaks in an annual variation, the main peak in April and the secondary peak in September. In winter, the cell abundance was low due to the low temperature, the phytoplankton community was mainly made up of small-celled diataoms. In spring, the phytoplankton community was developed very quickly by small-celled diatom in suitable conditions of temperature and nutrients. In summer, the cell abundance decreased and big-celled diatoms became predominated. In autumn, because of the replenish of nutrient, big-celled diatoms and dinoflagellates formed another cell abundance peak. during the annual variation of phytoplankton community in the Bohai Sea, species succession was the main process of community development, the species sequence just occur at special areas and special periods. The evolution of phytoplankton community in the Bohai Sea accords with the hypothesis of Margalef's phytoplankton community of four stages. But the size feature is contrary to the hypothesis, which may be caused by nutrient replenish in autumn in Bohai Sea and the top to down control.

关键词： Phytoplankton community seasonal changes species succession species sequence the Bohai Sea

Study on LF Refining Slag and Slagging Regime of High-Aluminium Steel

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Journal of Iron and Steel Research International 2011年第S2期18卷 201-206页

作者： ZENG Jian-hua1. ZHANG Min1. CHEN Yong1. HE Sheng-ping2, WANG qian2 (1. PanGang Group Research Institute Co, Ltd, Chengdu 61.731. Sichuan, China 2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China) PanGang Grp Res Inst Co Ltd Chengdu 611731 Sichuan Peoples R China Chongqing Univ Coll Mat Sci & Engn Chongqing 400044 Peoples R China

During secondary refining of molten steel, reaction of steel-slag has great influence on the quality of steel. Taking high aluminium steel ([Al]≥0.8%) for instance, reaction control of 4[Al]+3(SiO2) = 2(Al2O3)+3[Si] was discussed by both thermodynamics calculation and industrial experiments. The results show that content of silicon increased sharply when content of SiO2 in slag exceeded 1.%. In order to prevent the increment of silicon content and reoxidation for high aluminium steel, reasonable component range of LF refining slag is: %CaO/%Al2O3=1.6-1.9, %SiO2 1.. Results of the industrial experiments indicate that the CaO-Al2O3 based refining slag has strong ability of desulfurization and inclusion absorption. Average desulfurization rate is 80%, and T[O] reduces above 50% after refining, with the average sulfur content and T[O] about 0.0025% and 1.×1.-6,respectively, which can meet the requirements of secondary refining and obtain good castability of steel in continuous casting process.

关键词： high aluminium steel refining slag thermodynamics desulfurization inclusion

Investigation of the Leaching Behavior of Mortar Pipe Lining in Drinking Water

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Journal of Wuhan University of Technology(Materials Science) 2010年第5期25卷 893-896页

作者：高岳毅张亚梅 Department of Materials Science and Engineering Southeast University Jiangsu Key Laboratory of Construction Materials

The leaching behavior of three types of mortars was investigated using a self-design device which could simulate the field conditions of pipe lining. The results by ICP and ESEM measurement show that the developed sla... 详细信息

关键词： leaching pipe lining drinking water slag cement

Assessment of biochemical concentrations of vegetation using remote sensing technology

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Journal of Geographical Sciences 2002年第3期12卷 321-330页

作者： DING Shengyan, GU Jidong, qian Lexiang(1. College of Environment and Planning, Henan University, Kaifeng 475001. China 2. Department of Ecology & Biodiversity, The University of Hong Kong, Hong Kong, China) College of Environment and Planning Henan University Kaifeng 475001 Department of Ecology & Biodiversity The University of Hong Kong 香港

The main biochemicals (such as lignin, protein, cellulose, sugar, starch, chlorophyll and water) of vegetation are directly or indirectly involved in major ecological processes, such as the functions of terrestrial ecosystems (i.e., nutrient-cycling processes, primary production, and decomposition). Remote sensing techniques provide a very convenient way of data acquisition capable of covering a large area several times during one season, so it can play a unique and essential role provided that we can relate remote sensing measurements to the biochemical characteristics of the Earth surface in a reliable and operational way. The application of remote sensing techniques for the estimation of canopy biochemicals was reviewed. Three methods of estimating biochemical concentrations of vegetation were included in this paper: index, stepwise multiple linear regression, and stepwise multiple linear regression based on a model of the forest crown. In addition, the vitality and potential applying value are stress

关键词： biochemicals vegetation remote sensing techniques

Relaxant effect of an estrone derivate EA303 on isolated colonic smooth muscle of rabbits

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Relaxant effect of an estrone derivate EA303 on isolated col...

两岸三地药理学与临床药理学术会议

作者： ZHU Lan~1.FU Shou-ting~1.CHEN Guo-liang~2 ZHOU qian-qian~2 (1. School of the Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang 1.001., China 2. School of the Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 1.001., China)

Objective To study the relaxant effect mechanism of an estrone derivate EA303 on isolate colonic smooth muscle of *** Preparations of the isolated colonic smooth muscle of rabbits were pre- *** effect of EA303 on potassium channel,βreceptor and prostaglandin were studied by observing the difference of relaxant dose-effect curves of EA303 on preparations pre-contracted with BaCl,High K solution and Acetylcholine chloride (ACh) in the absence or presence incubation with glibenclamide (1.μM),propranolol (0.1.M) and Indometacin (1.μM).Results The relaxant effect of EA303 on contrac- tion caused by BaCl and High Ksolution were weakened by glibenclamide inhibiting the opening of K channel while the relaxant effect of that on contraction caused by ACh was strengthened,after adding pro- pranolol inhabitingβreceptor,EA303 attenuated the relaxant action on contraction caused by ***303 had some relaxant impact on contraction induced by High Ksolution after adding indometacin inhabiting the synthesis the prostaglandin (PG).Conalusions The relaxant effect of EA303 on isolated colonic smooth muscle of rabbits may be related with PG synthesis enzyme,potassium channel andβreceptor.

关键词： colonic smooth muscle rabbit potassium channel

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毕氏酵母流加发酵过程的比生长速率控制

上海交通大学学报 2004年第5期38卷 799-801,805页

作者：任海涛袁景淇邓建慧贾茜上海交通大学自动化系上海200030 华北制药集团新药中心石家庄050015

在已建立的毕氏酵母发酵过程结构模型基础上,进行了甲醇流加阶段恒定比生长速率控制研究.实验结果表明,基于模型的甲醇进料策略可以将细胞比生长速率恒定地控制在设定值;在比生长速率均值相等的情况下,恒定比生长速率进料策略较之恒速... 详细信息

在已建立的毕氏酵母发酵过程结构模型基础上,进行了甲醇流加阶段恒定比生长速率控制研究.实验结果表明,基于模型的甲醇进料策略可以将细胞比生长速率恒定地控制在设定值;在比生长速率均值相等的情况下,恒定比生长速率进料策略较之恒速进料策略蛋白产量更高.

关键词：毕氏酵母比生长速率重组人血清蛋白

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生物固体微波杀菌及机理研究

微波学报 2003年第4期19卷 70-72,82页

作者：傅大放周涛钱科东南大学南京210096 南京船舶雷达研究所南京210003

以粪大肠杆菌为指示菌 ,试验比较了微波杀菌和传统加热杀菌的效果。试验结果表明 ,微波杀菌不仅杀菌速率快 ,而且杀菌效果明显优于加热杀菌。通过酶活性检测和透射电镜观察 ,探讨了微波杀菌的机理。同时。

关键词：微波杀菌生物固体酶活性检测透射电镜非热效应机制

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高速公路入口匝道启发式控制的仿真研究

系统仿真学报 2009年第21期21卷 6829-6832页

作者：柴干黄琪方程炜赵倩东南大学智能运输系统研究中心南京210096 河南省交通基本建设质量检测监督站郑州450006

为了解决高速公路交通事件引起拥堵的控制问题,提出了基于Bottleneck算法的高速公路入口匝道启发式控制方法并进行了数字仿真。针对交通事件引起拥挤时,事发点上游密度变大,下游密度变小的事实,选取交通密度代替Bottleneck算法中的流量... 详细信息

为了解决高速公路交通事件引起拥堵的控制问题,提出了基于Bottleneck算法的高速公路入口匝道启发式控制方法并进行了数字仿真。针对交通事件引起拥挤时,事发点上游密度变大,下游密度变小的事实,选取交通密度代替Bottleneck算法中的流量作为控制参数,推导出拥堵条件下的入口匝道协调控制算法;针对单点层面调节缓慢,协调层面调节振荡与调节过度的缺陷,应用数字仿真方法,通过控制效果的仿真分析,提出了改进的调节率公式。以宁杭高速公路为背景,应用MATLAB仿真软件,进行了控制效果的仿真研究,从数字仿真层面表明了所提出的启发式控制算法的有效性。

关键词：高速公路交通事件入口匝道启发式控制仿真

挤压态Mg-(6～9)Al-Zn的组织性能和断裂行为分析

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特种铸造及有色合金 2009年第9期29卷 857-860页

作者：杜勇曹韩学龙思远曹凤红朱茜重庆大学材料科学与工程学院东风汽车有限公司

通过金相观察、拉伸试验和SEM分析等方法,研究了挤压态Mg-(6～9)Al-Zn合金的显微组织和力学性能。结果表明,挤压工艺使铸态下粗大枝状晶变成均匀细小等轴晶,随着Al含量增加,合金抗拉强度、硬度和晶粒大小均呈升高趋势,而伸长率先上升后... 详细信息

通过金相观察、拉伸试验和SEM分析等方法,研究了挤压态Mg-(6～9)Al-Zn合金的显微组织和力学性能。结果表明,挤压工艺使铸态下粗大枝状晶变成均匀细小等轴晶,随着Al含量增加,合金抗拉强度、硬度和晶粒大小均呈升高趋势,而伸长率先上升后下降。AZ91.合性能最优,抗拉强度、屈服强度和伸长率分别达336.7MPa、245.3MPa和1..1.。Mg-(6～9)Al-Zn合金均表现为准解理断裂特征,适当的Al含量有利于改善合金的综合性能,但Al含量过高所形成的脆性β(Mg1.Al1.)相加剧了镁合金的断裂倾向。

关键词： Mg-(6~9)Al-Zn合金 Al含量组织性能断裂特征