海洋微藻胞外产物研究进展

厦门大学国家教育部海洋生态环境开放研究实验室(MEE)开放基金(MEE9903);; 教育部留学回国人员科研启动基金(教外司留[1999])363号资助项

1994年全国体操锦标赛男子双杠比赛的调研与思考

本文通过对１９９４年全国体操锦标赛暨第１２届亚运会选拔赛双杠项目的技术调研，较详尽地报告了双杠比赛的技术情况。并在此基础上，对我国双杠的技术现状进行了分析和研究，提出了一些值得思考的问题

L ∞U n ifo rm Convergence of a D ifference Schem e fo r a Singu lar Pertu rbat ion P rob lem Invo lving Two Param eters

摘要　对带有两个小参数的奇异摄动问题, 给出一种差分格式. 并证明其在L ∞ 范数意义下 的一致收敛性. 最后给出数值例子. 　Abs tra c t　A difference schem e is given fo r so lving a singu lar pertu rbat ion p rob lem invo lving two param eters. The so lu t ion of the schem e is show n to be of un ifo rm convergences in the discrete L ∞ no rm. The num erical examp les are given

EXTRACELLULAR DISSOLVED ORGANIC CARBON OF A MARINE NANOPLANKTONIC DIATOM CHAETOCEROS SP.:INFLUENCE OF DAILY RHYTHM,LIGHT AND TEMPERATURE

正> The extracellular dissolved organic, carbon (DOC) and algal cell particlutate organiccarbon (POC) of a marine nanoplanktonic diatom Chaetoceros sp. were determined in this study. Thedaily rhythm and the influence of light and temperature on the production rate of DOC and POC were stud-ied by growing the diatom under different laboratory controlled conditions of light and temperature. Theresults showed that the production of DOC and POC varied with light and temperature and were generallyhigher at daytim... 【英文摘要】 The extracellular dissolved organic carbon (DOC) and algal cell particJuiate organic carbon (POC) of a marine nanoplanktonic diatom Chaetoceros sp. were determined in this study. The daily rhythm and the influence of light and temperature on the production rate of DOC and POC were studied by growing the diatom under different laboratory controlled conditions of light and temperature. The results showed that the production of DOC and POC varied with light and temperature and were generally higher at dayti...This work was supported by the MEE Key Laboratory of Ministry of Education,Xiamen University(Grant No.MEE9903)and by Ministry of Education Foundation for University Key Teache

Task Migration Node Selection with Reliable Service Quality in Edge Computing Environment

随着物联网、大数据和5G网络的快速发展及应用，传统的云计算模式已无法高效处理网络边缘设备所产生的海量计算任务，边缘计算应运而生。边缘计算环境下，计算任务将被迁移到接近数据源的计算设备上执行，这为拓展终端节点资源以及缓解云中心负载提供了新的解决方案。现有的任务迁移决策均是在任务迁移节点确定的前提下制定的，并未考虑存在多个任务迁移节点可选的情景；而边缘计算下任务迁移节点的选择直接影响着任务迁移的服务质量，因此文中构建了服务质量可信模型，分别从时间可信、行为可信、资源可信3个维度对任务迁移节点进行评价。为了避免任务迁移节点数量巨大带来的选择效率低的问题，采用基于聚类编码的skyline查询算法对任务迁移节点进行筛选，并利用灰色关联分析法进行任务迁移节点的最终选择。实验结果表明，所提基于服务质量可信的任务迁移节点选择策略将任务迁移成功率平均提高36%，将任务完成吞吐量平均提高18%。</p

天然次生林中小斑啄木鸟的取食偏好

2022年3—6月，于黑龙江帽儿山森林生态系统国家野外科学观测研究站开展小斑啄木鸟（Dryobates minor）取食偏好的调查。采用样方结合样线与无线电追踪技术追踪小斑啄木鸟，采用基于“利用-可利用型”方法的Bailey’s方法分析小斑啄木鸟取食树木与取食生境的偏好，采用主成分分析归纳影响选择取食地的主要因子，利用Fisher’s精确检验、非参数检验和相关性检验探究性别在取食行为中及主要因子间的差异。结果显示：小斑啄木鸟偏好在活立木上，用轻啄的方式，在冠层处、侧枝上短时取食；株密度、取食树高度、坡度、优势种、最近人为干扰距离与样方内树的均高是影响小斑啄木鸟选择取食树木与取食生境的主要因子；小斑啄木鸟偏好在株密度适中、取食树的高度约15 m、平坡处、以春榆（Ulmus davidiana var.japonica）或胡桃楸（Juglans mandshurica）为优势种、靠近人为干扰和样方内树均高约13 m的生境内取食；与雌性相比，雄性还偏好在株密度较低、株高在3~5 m的树木上取食

Determination of five poisonous elements in 40 kinds of traditional chinese medicines by microwave digestion with ICP-MS

建立了微波消解-电感耦合等离子体质谱(ICP-MS)法测定中药材中Cu,As,Cd,Hg,Pb 5种有毒元素的方法,采用In为内标,利用其回收率对以上5种元素的测定结果进行校正。该方法对5种元素的检出限分别为0.063,0.015,0.018,0.006,0.056μg/g,相对标准偏差为0.2%~4.0%,In元素加标回收率为96.7%~104.5%,说明该方法灵敏度高,结果准确。利用该方法对40种不同产地中药材中5种有毒元素进行了测定,结果表明中药材中有毒元素超标问题相当严重,必须在中药材生产过程中予以高度重视。A method based on microwave sample digestion and inductively coupled plasma-mass spectrometry(ICP-MS) detection was established for determination of Cu,As,Cd,Hg and Pb in TCM(Traditional Chinese medicine).Indium was used as an internal standard element to calibrate the results of determination of these five elements.Determination limits of these five elements were in the range of 0.006～0.063 μg/g,coefficients of variation(CV%) were in the range of 0.2%～4.0%,and the recoveries of In were in the range of 96.7%～104.5%.The method has been applied to determining the five poisonous elements in 40 kinds of TCM.The results indicated that the problem of poisonous element in TCM was very serious,more attention should be paid to this problem in the production of TCM.国家自然科学基金重点项目(20235020);; 青岛“2004将才计划”(04-3-JJ-11)和共建生物医药研发测试中心(LS-05-KJZX-76)项目资