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不同药芯焊丝工艺条件下X80管线钢焊缝组织与性能对比

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压力容器 2024年第1期41卷 12-17,44页

作者：王汉奎李阳姚呈祥李海舰何仁洋中国特种设备检测研究院北京100029 中石油长北天然气处理厂陕西榆林719000

为保障管线安全、平稳运行,提高管线环焊缝的可靠性,对已经投用的2条X80管线环焊缝进行对比分析。2条X80管线的环焊缝的焊接方法为药芯焊丝自保护焊(FCAW-S)和药芯焊丝气保护焊(FCAW-G),对比分析了焊缝的化学成分、金相组织、硬度、拉... 详细信息

为保障管线安全、平稳运行,提高管线环焊缝的可靠性,对已经投用的2条X80管线环焊缝进行对比分析。2条X80管线的环焊缝的焊接方法为药芯焊丝自保护焊(FCAW-S)和药芯焊丝气保护焊(FCAW-G),对比分析了焊缝的化学成分、金相组织、硬度、拉伸强度和冲击韧性等方面。分析发现,2种焊接方法获得焊缝均比母材Ni含量高,Cr、Mo含量低;FCAW-S焊缝的Al、N含量远高于FCAW-G焊缝及母材。FCAW-S焊缝晶粒内,亚结构尺寸大、取向的多样性低。与FCAW-G焊缝相比,FCAW-S焊缝的硬度高,屈服强度低、抗拉强度较为接近。由系列冲击试验可见,FCAW-S焊缝的韧脆转变温度为12.2℃,比FCAW-G焊缝高55.6℃。据此推断相同条件下,采用FCAW-S焊接的环焊缝发生脆性断裂的概率大。

关键词： X80管线环焊缝脆性断裂焊缝性能

Spatial and temporal dynamics of phytoplankton and bacterioplankton biomass in Sanya Bay, northern South China Sea

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Journal of Environmental Sciences 2009年第5期21卷 595-603页

作者： ZHOU Weihua LI Yao CAI Chuanghua HUANG Liangmin wang hankui XU Jirong DONG Junde ZHANG Si LED and LMB South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Tropical Marine Biological Research Station in Hainan Chinese Academy of Sciences Sanya 572000 China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Laboratory of Marine Ecosystem and Biogeochemistry SOA Second Institute of Oceanography SOA Hangzhou 310012 China

The composition of phytoplankton and the dynamics of phytoplankton and bacterioplankton biomass （PB and BB, respectively） of Sanya Bay, South China Sea, were determined. A total of 168 species （67 genera） phytoplankton were identified, including BaciUariophyta （diatom, 128 species）, Pyrrophyta （35 species）, Cyanophyta （3 species）, and Chrysophyta （2 species）. Annual average zbundance of phytoplankton was 1.2 × 107 cells/m^3, with the highest abundance in autumn, and the lowest in summer. Annual average diversity index （H＇） and evenness （J） values were 3.96 and 0.70, respectively. Average chlorophyll-a was 2.5 mg/m^3, and the average PB was 124 mg C/m^3, with the highest value in autumn. Surface PB was higher than the bottom, except for summer. Annual mean bacterioplankton abundance and BB were 6.9 × 10^1l cells/m^3 and 13.8 mg C/m^3, respectively. The highest BB was found in summer, followed by winter, spring, and autumn. Surface BB was higher than bottom all year round. The spatial distribution patterns of PB and BB were very similar with the highest biomass in the estuary, and decreased seaward, primarily due to the terrestrial input from the Sanya River and influx of oceanic water. The main factor influencing PB and BB was dissolved inorganic nitrogen （DIN）. Other factors such as temperature, which is above 22℃ throughout the year, had a negligible impact. The correlation between BB and PB was significant （P 〈 0.01）. The annual average ratio of BB/PB was 0.12 （0.06-0.15）. Phytoplankton primary production was one of the most important factors in controlling the distribution of bacterioplankton.

关键词： biomass phytoplankton bacterioplankton Sanya Bay northern South China Sea

Antibacterial substance from mucus of a scleractinian coral,Symphyllia gigantea

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Acta Oceanologica Sinica 2007年第2期26卷 140-143页

作者： CHEN Guohua HUANG Liangmin TAN Yehui YIN Jianqiang wang hankui HUANG Hui ZOU Kun LI Ruiping Key Laboratory of Applied Marine Biology of Guangdong Province and Chinese Academy of Sciences South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Hubei Key Laboratory of Natural Product Research and Development College of Chemistry ＆ Life Sciences China Three Gorges University Yichang 443002 China

Coral mucus covers the surface of coral and contains antibacterial substances as a first line of defense. Coral mucus not only enables the coral itself to resist disease, but also provides antibacterial agents for people. We collected mucus from a scleractinian coral （Symphyllia gigantea） at Sta. Sanya （China）, then extracted the antibacterial substances using 10% glacial acetic acid with the help of antiprotease inhibitors, and tested the antibacterial activity by a terrestrial bacterium （Staphylococcus aurevs） and a marine bacterium （Vibrio anguillarum）. The result showed that, there were antibacterial agents in the mucus, and their antibacterial activities were lost by treatment of the sample at 90 ℃ water for 10 min.

关键词： coral mucus antibacterial substance antibacterial activity

Status monitoring and health assessment of Luhuitou fringing reef of Sanya, Hainan, China

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Chinese Science Bulletin 2006年第B12期51卷 81-88页

作者： ZHANG Qiaomin SHI Qi CHEN Gang FONG T C W WONG D C C HUANG Hui wang hankui ZHAO Meixia South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Kay Laboratory of Marginal Sea Geology Chinese Aeademy of Sciences Guangzhou 510301 China Department of Marine and Fishery of Hainan Province Haikou 570203 China Environmental Resources Management Hong Kong China Hong Kong Cetacean Research Project Hong Kong China Tropical Marine Biological Research Station in Halnan Chinese Academy of Sciences Sanya 572000 China

The monitoring survey and health assessment for benthic community were carried out in Luhuitou fringing reef of Sanya, Hainan, China in 2002. Monitoring survey included manta tow, line intercept transect, video transect and digital photograph. The mean live coral cover was 23.40%. Comparison of used monitoring methods showed that video transect can replace line intercept transect, and 50 m transect is better than 20 m transect in uneven coral region. Survey data and comparison with previous research work showed that Luhuitou fringing reef has been damaged severely and has a general declining trend with live coral cover from about 85% in the 1960s down to 20% in 2004, but it still has quite high biodiversity and therefore has special protection value. Main factors of Luhuitou fringing reef declining were human activities including reef rock digging and curios collecting, destructive fishing, sediment and pollutant from coastal land, and recent marine aquaculture. Only strengthening integrated management can reach improvement and restoration of Luhuitou declining coral reef ecosystem.

关键词：海南岛三亚鹿回头珊瑚礁生物多样性环境监测健康评估

并行化光滑分子动力学方法及其与分子动力学的耦合

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计算物理 2008年第6期25卷 718-724页

作者：王汉奎张雄刘岩清华大学航天航空学院北京100084

提出光滑分子动力学方法(SMD)的并行化计算方法,编制光滑分子动力学以及光滑分子动力学-分子动力学(SMD-MD)耦合的并行程序,并分析铜纳米单晶的单向拉伸和带裂纹板的拉伸问题.光滑分子动力学在分子动力学基础上引入背景网格,在背景网格... 详细信息

提出光滑分子动力学方法(SMD)的并行化计算方法,编制光滑分子动力学以及光滑分子动力学-分子动力学(SMD-MD)耦合的并行程序,并分析铜纳米单晶的单向拉伸和带裂纹板的拉伸问题.光滑分子动力学在分子动力学基础上引入背景网格,在背景网格点上求解运动方程,由此将控制MD临界时间步长的因素化为背景网格单元尺寸,扩大可用的时间积分步长,缩短总计算时间.通过单晶拉伸和带裂纹板拉伸等较大规模问题的计算,验证方法的正确性.与传统分子动力学相比,SMD和SMD-MD耦合方法可以节约计算时间.

关键词：光滑分子动力学并行处理多尺度计算多时间步

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基于小冲杆试验数据的力学性能的数值模拟

华东理工大学学报（自然科学版） 2019年第4期45卷 669-674页

作者：罗安王汉奎王建文华东理工大学机械与动力工程学院上海200237 中国特种设备检测研究院北京100029

小冲杆试验是研究在役设备材料性质的重要手段,小冲杆试验的结果与传统拉伸试验的关联性研究更为重要.已有的小冲杆试验与传统拉伸试验关联性的研究均忽略了摩擦对于试验结果的影响,得出的试验结果过于理想化,参考意义不大,且小冲杆试... 详细信息

小冲杆试验是研究在役设备材料性质的重要手段,小冲杆试验的结果与传统拉伸试验的关联性研究更为重要.已有的小冲杆试验与传统拉伸试验关联性的研究均忽略了摩擦对于试验结果的影响,得出的试验结果过于理想化,参考意义不大,且小冲杆试验的数据难以大量获得,因此通过数值模拟方法在少量数据基础上建立材料的应力-应变关系具有重要的现实意义.以304#不锈钢材料为例,通过已经建立的小冲杆试验数据和有限元数值模拟数据之间的关联关系,在充分考虑摩擦对于试验关联性影响的基础上,研究摩擦因子μ与试样关联参数之间的关系,结果表明两者之间符合程度较高.

关键词：小冲杆试验传统拉伸试验数值模拟关联系数摩擦因子

Large-Scale Shell Model for Nuclear Structure and Nuclear Astrophysics Studies

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原子核物理评论 2016年第2期33卷 242-245页

作者：王韩奎金华孙扬何翊绮秦伟王高亮 College of Physics and Telecommunication Engineering Zhoukou Normal University Department of Mathematics and Physics Shanghai Dianji University Department of Physics and Astronomy Shanghai Jiao Tong University College of Mathematics and Statistics Zhoukou Normal University

The study of neutron-rich nuclei near132 Sn is interesting and important for both nuclear structure and nuclear astrophysics. For a considerably large model space allowing cross-shell excitations,a new effective Hamiltonian is determined by employing the extended pairing-plus-quadrupole model with monopole corrections. Calculations for two mass regions, for the north-east quadrant of132 Sn with Z > 50 and N > 82 and for the south-west quadrant with Z < 50 and N < 82, have been performed recently. The structure of these nuclei is analyzed in detail, and the role of the monopole corrections can be clearly seen.

关键词： large-scale shell model monopole correction single-particle state core-excitation exotic nuclei

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丰中子锰同位素的壳模型计算

原子核物理评论 2016年第3期33卷 268-273页

作者：金华王韩奎孙扬上海电机学院数理教学部上海201306 中国科学院近代物理研究所高精度核谱学重点实验室兰州730000 周口师范学院物理与电信工程学院河南周口466000 上海交通大学物理与天文系上海200240

利用球形壳模型和投影壳模型两种方法对Z≤28,N=40附近pf壳的丰中子核素的结构进行了一系列的研究。以丰中子的锰同位素为例讨论了对奇奇核^(58,60)Mn的两种壳模型计算结果。结果显示,两种理论方法都很好地再现了^(58,60)Mn实验上观测... 详细信息

利用球形壳模型和投影壳模型两种方法对Z≤28,N=40附近pf壳的丰中子核素的结构进行了一系列的研究。以丰中子的锰同位素为例讨论了对奇奇核^(58,60)Mn的两种壳模型计算结果。结果显示,两种理论方法都很好地再现了^(58,60)Mn实验上观测到的从低激发到高自旋态的能级。在对这两个同位素由中子g9/2轨道闯入所产生的负宇称转动带进行描述时,两种理论计算也得到了一致的结果。通过对比,阐明了两种壳模型方法及其采用的有效相互作用在该丰中子核区的适用性,特别强调了中子g9/2轨道的激发对于pf壳Z≤28丰中子核素结构的重要性。

关键词：丰中子核锰同位素球形壳模型投影壳模型

双幻核^(16)O附近核素^(14)C,^(14,15)N,^(14-18)O能谱结构的壳模型计算分析

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原子核物理评论 2020年第3期37卷 563-568页

作者：姜俊基金蕊王韩奎周口师范学院物理与电信工程学院河南周口466000 上海交通大学物理与天文学院上海200240

根据YSOX,WBT以及WBP三种不同的有效相互作用对双幻核^(16)O附近同位素^(14)C,^(14,15)N,和^(14-18)O的能谱结构进行了比较分析,在结合相应的实验值的基础上揭示了重新考虑跨壳相互作用对壳模型理论计算的优化效果。借助不同的相互作用... 详细信息

根据YSOX,WBT以及WBP三种不同的有效相互作用对双幻核^(16)O附近同位素^(14)C,^(14,15)N,和^(14-18)O的能谱结构进行了比较分析,在结合相应的实验值的基础上揭示了重新考虑跨壳相互作用对壳模型理论计算的优化效果。借助不同的相互作用以及大量理论数据与实验值的对比,发现了已有壳模型有效相互作用在该核区的不足之处,例如部分能级误差较大、能级次序反转等,这为下一步改进这些有效相互作用创造了条件。

关键词：壳模型有效相互作用能谱结构组态成分