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Search Results: 1 - 10 of 328601 matches for " <br>徐嘉莉 "
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A Fast Personalized Bibliographic Recommendation Method
一种快速的个性化书目推荐方法*

Xu JialiChen Jia,<br>,陈佳
现代图书情报技术 , 2010,
Abstract: 针对高校数字图书馆现有书目推荐方法存在的不足,提出一种快速的个性化书目推荐方法。该方法利用矩阵向量技术和压缩技术对Apriori算法进行改进,以提高数据资源的挖掘效率,然后利用改进的Apriori算法从读者的借阅记录中挖掘出图书之间的关联关系,以此为读者的借阅提供个性化的书目推荐服务。仿真结果能够证明该方法的有效性。
Updating algorithm based on matrix for mining frequent item sets
一种基于矩阵的频繁项集更新算法*

XU Jia-li,CHEN Jia,<br>,陈佳
计算机应用研究 , 2010,
Abstract: Aiming at updating problems of frequent item sets, this paper proposed an updating algorithm based on matrix(UABM) for mining frequent item sets.Divided the updated database into original database and new one based on time. Converted these databases into matrixes.Got the new frequent sets by matrix cropping and the bit operation, and updated the gotten frequent item sets on gotten ones.The experiments show the algorithm is not only feasible and efficient but also fit to update freguent item sets for a large-scale and dense data base.
A universal index formula for evaluating eutrophication level using a power function of weighted sums
富营养化评价的幂函数加和型普适指数公式

LI Zuoyong,WANG Jiayang,ZHAO Xiaoli,XU Tingting,<br>李祚泳,,赵晓,婷婷
环境科学学报 , 2008,
Abstract: 提出了一个用幂函数加和型表示湖泊富营养化评价的综合指数公式,并采用粒子群算法优化公式中的参数,得出优化后适用于多指标的富营养化综合评价的普适指数公式,该公式的特例也可作为单项指标的富营养化评价指数公式.将优化好的湖泊富营养化评价公式用于我国不同地域和不同类型的65个湖泊的实例评价.其评价结果与用修正卡森指数公式TSI.和我国营养状态指数公式TSI,及其它方法的评价结果基本一致,并与实况相符,从而为水体富营养化评价提供了一种新的有效途径.
一种快速的个性化书目推荐方法*
,陈佳
现代图书情报技术 , 2010,
Abstract: ?针对高校数字图书馆现有书目推荐方法存在的不足,提出一种快速的个性化书目推荐方法。该方法利用矩阵向量技术和压缩技术对apriori算法进行改进,以提高数据资源的挖掘效率,然后利用改进的apriori算法从读者的借阅记录中挖掘出图书之间的关联关系,以此为读者的借阅提供个性化的书目推荐服务。仿真结果能够证明该方法的有效性。
Screening of Bacillus stubilis PGAN-12 and Production of γ-Polyglutamic Acid by Fermantation
g-聚谷氨酸产生菌的筛选及发酵条件

SANG Li,XU Hong,LI Hui,ZHANG Lu-jia,JIANG Min,<br>桑,,李晖,张鲁,姜岷
过程工程学报 , 2004,
Abstract: Strain PGAN-12 which could produce ?-polyglutamic acid (?-PGA) was isolated from soils and identified taxonomically as Bacillus subtilis. PGAN-12 could produce a large amount of ?-PGA in the medium containing glucose and sodium glutamate. The suitable carbon source was glucose, however, when organic acids in TCA cycle including citric acid were used as carbon sources, PGAN-12 did not produce ?-PGA. The optimum nitrogen source was yeast extract. PGAN-12 is a ?-PGA producing strain depending on L-glutamic acid in the medium. In the presence of 70 g/Lsodium glutamate, the highest ?-PGAconcentration reached up to 18.32 g/L, while 30 g/Lsodium glutamate was added, 14.2 g/L?-PGA was obtained with the highest yield of 62.1%.
Algorithm based on vector for mining maximal frequent itemsets in sliding window over data streams
基于向量的数据流滑动窗口中最大频繁项集挖掘*

XU Jia-li,CHEN Ji,HU Qing,HUANG Bo,GUO Hong-xia,<br>,陈佳,胡庆,黄波,郭红霞
计算机应用研究 , 2012,
Abstract: This paper proposed an algorithm based on vector for mining maximal frequent itemsets in sliding window over data streams (MFISW) aimed at the mining problems of maximal frequent itemsets over data streams. Firstly,the algorithm used vector to express items in data streams and solved the problem of time granularity through quantitative updating strategies. Secondly, it stored the ancillary information using a matrice and a array in creating the frequent sets through the bit operation, and improved the mining efficiency again using pruning technology during creating the maximal frequent sets. Finally, it improved the detecting efficiency by using a index list to store mining results.Theoretical analysis and experimental results show the algorithm is efficient.
Influencing factors of partial nitrification process for treatment of wastewater with high concentration-ammonium
高氨氮废水的半硝化工艺影响因素

Xu Shan,Cheng Guanwen,Wei Wenyuan,Zhang Li,Yang Jiachun,Kenji Furukawa,<br>,成官文,韦文渊,,,Kenji Furukawa
环境工程学报 , 2012,
Abstract: 采用泳动床反应器对含高浓度氨氮的污泥脱滤液进行了半硝化反应影响因素研究。实验结果表明,半硝化工艺可以在较高负荷条件下运行,其出水NO-2-N/NH+4-N比例稳定在1.1±0.05∶1,基本满足了厌氧氨氧化工艺的进水要求。此外,温度和溶解氧对工艺运行具有重要影响,控制适宜无机碳含量与NH+4-N比值、碱度与氨氮比值有利于半硝化工艺的进行。
诱导型多能干细胞通过修复ZO-1蛋白改善脓毒症小鼠肠 黏膜通透性和细菌移位
Effects of Human Induced Pluripotent Stem Cells on Intestinal Permeability and Bacterial Translocation of Lipopolysaccharide -induced Septic Mice via ZO -1 Restoration

,詹 蔚,江 仁,刘志豪,杨春华,廖瑾,,熊 艳<br>XU Jia,ZHAN Wei,JIANG Ren,LIU Zhi -hao,YANG Chun -hua, LIAO Jin -li, ZHAN Hong, XIONG Yan
- , 2016,
Abstract:
The Proof Based on Schur Partition to a Class of Inequalities Involving Parameters
用Schur分拆证明一类含参数的不等式

XU Jia,<br>
系统科学与数学 , 2009,
Abstract: A proof for an inequality conjectrue is presented, based on Schur partition for symmetric polynomials and real root seperation algorithm for univariate polynomials. Furthermore, the mixed method is applied to dealing with a class of symmetric polynomials involving parameters.
郑州—兰考区域性隐伏断裂的发现及其意义
,赵云章,王晓青,
国土资源遥感 , 2005, DOI: 10.6046/gtzyyg.2005.02.13
Abstract: ?黄河下游郑州京广铁桥—兰考段河道穿行于华北平原济源—开封凹陷,南邻太康隆起。该河段为著名的地上悬河,属典型的游荡型河床,河流地质作用以强烈侧蚀南岸为特征。遥感、物探综合解译首次发现在河道南岸存在一东西向郑州—兰考区域性隐伏深大断裂带,该断裂带的发现,从河流地质作用特征与基底新构造活动关系方面解释了该段黄河发生、发展和演化机理,解释了河床“小尺度游荡,大尺度呈直线状延伸”的河道地貌特征和“河流强烈侧蚀南岸”的河流地质作用特征,对黄河下游河道防洪、治理具有重要意义。
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