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基于EM的启动子序列半监督学习

计算机研究与发展 2009年第11期46卷 1942-1948页

作者：王立宏赵宪佳武栓虎烟台大学计算机科学与技术学院山东烟台264005 青岛大学国际学院山东青岛266071

启动子的预测对于基因的定位有重要意义.已有多种对启动子进行预测的算法,涉及到信号搜索、内容搜索和CpG岛搜索等多种策略.基于马尔可夫模型的启动子分类方法也有研究,其中的转移概率都是直接通过统计已标号训练样本序列得来的.将半监... 详细信息

启动子的预测对于基因的定位有重要意义.已有多种对启动子进行预测的算法,涉及到信号搜索、内容搜索和CpG岛搜索等多种策略.基于马尔可夫模型的启动子分类方法也有研究,其中的转移概率都是直接通过统计已标号训练样本序列得来的.将半监督学习思想引入启动子序列分析中,推导出转移概率等参数的最大似然估计公式.实验中将待测试基因序列片段同已标号训练样本混合,利用得出的参数值对基因序列片段进行识别,使用少量的已标号的样本数据能得出较好的启动子识别结果.

关键词：马尔可夫模型最大似然估计启动子识别转移概率半监督学习

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一种改进的最邻近分类算法

信息通信 2018年第12期31卷 5-7页

作者：鞠冬彬赵宪佳青岛大学数据科学与软件工程学院山东青岛266071

K最邻近算法(K-nearest neighbor,KNN)是一种无参数、分类效果显著、简单的经典分类算法,但是实际的训练样本经常存在类与类之间分布不均的现象,造成实验结果的偏差。针对这个问题,进行基于密度改进KNN算法。实验结果表明,改进的分类算... 详细信息

K最邻近算法(K-nearest neighbor,KNN)是一种无参数、分类效果显著、简单的经典分类算法,但是实际的训练样本经常存在类与类之间分布不均的现象,造成实验结果的偏差。针对这个问题,进行基于密度改进KNN算法。实验结果表明,改进的分类算法在分类的准确率平均提高了3.3%,召回率平均提高1.6%,F1值均值提高2.4%。

关键词： KNN最邻近算法文本分类余弦相似度类间分布不均

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用户权限管理及其与系统主菜单关系规划

青岛远洋船员学院学报 2002年第4期23卷 13-17页

作者：赵宪佳栾积成青岛远洋船员学院龙口东江中学

通过对信息系统中的用户权限管理与系统主菜单的关系进行分析,采用Power Builder设计了一套用户权限管理通用程序,详细介绍该通用程序的设计思路和技术实现方法。

关键词：用户权限管理主菜单规划程序设计技术实现计算机管理信息系统

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基于文本的关键词提取方法研究与实现

信息与电脑 2020年第5期32卷 51-54页

作者：姜永清赵宪佳青岛大学数据科学与软件工程学院山东青岛266071

关键词提取技术是目前计算机文本分类等技术采用的基本技术。笔者根据传统TFIEF算法的特点,研究出创新型的关键词提取算法,算法的基础是以词语权重来计算的,并在文本候选关键词中把词频比设计成去噪音的权值以及引入词语相似度,该方法... 详细信息

关键词提取技术是目前计算机文本分类等技术采用的基本技术。笔者根据传统TFIEF算法的特点,研究出创新型的关键词提取算法,算法的基础是以词语权重来计算的,并在文本候选关键词中把词频比设计成去噪音的权值以及引入词语相似度,该方法对降低文本同类语料库提取关键词权重的影响都是非常有效的,也消除了TFIDF算法存在偏差。经过实验的分析和对比,该新型方法拥有更高的平均召回率。

关键词： TFIDF算法关键词提取词语相似度

A complete assembly of the rice Nipponbare reference genome

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Molecular Plant 2023年第8期16卷 1232-1236页

作者： Lianguang Shang Wenchuang He Tianyi Wang Yingxue Yang Qiang Xu xianjia zhao Longbo Yang Hong Zhang Xiaoxia Li Yang Lv Wu Chen Shuo Cao Xianmeng Wang Bin Zhang Xiangpei Liu Xiaoman Yu Huiying He Hua Wei Yue Leng Chuanlin Shi Mingliang Guo Zhipeng Zhang Bintao Zhang Qiaoling Yuan Hongge Qian Xinglan Cao Yan Cui Qianqian Zhang Xiaofan Dai Congcong Liu Longbiao Guo Yongfeng Zhou Xiaoming Zheng Jue Ruan Zhukuan Cheng Weihua Pan Qian Qian Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Yazhouwan National Laboratory No.8 Huanjin RoadYazhou DistrictSanya CityHainan Province 572024China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Plant Functional Genomics of the Ministry of Education Jiangsu Co-Innovation Center for Modern Production Technology of Grain CropsYangzhou UniversityYangzhou 225009China

Dear Editor,In 2005,the current commonly used rice reference genome(Oryza sativa *** ***)was initially released by the International Rice Genome Sequencing Project(International Rice Genome Sequencing Project,2005).Thereafter,the reference genome was further updated in 2013 with improved genome assembly(IRGSP-1.0)and gene annotations(MSU7,RAP-DB)(Kawahara et al.,2013;Sakai et al.,2013).In the past 10 years,this reference has been serving as one of the most important genetic resources for subsequent rice functional genomics *** several rice genomes had been assembled into gapless chromosomes with only 2–5 telomeres absent(Li et al.,2021;Song et al.,2021;Zhang et al.,2022),the IRGSP1.0 and its annotations still performed as the most widely used ***,limitations of sequencing technology and intricate genomic organization led to an under-representation of complex regions in this reference,leaving a total of 72 major gaps(including 19 telomeres),167 minor gaps,and 779 unknown bases(Kawahara et al.,2013),with an estimated length of3%of the genome unsolved.

关键词： Sakai bases assembly

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新时代高校武德教育的教化与超越

中华武术（研究） 2018年第9期7卷 48-52页

作者：赵先甲周惠新彭能长沙师范学院体育系湖南长沙410012 湖南人文科技学院湖南娄底417000

本文运用质的研究方法对新时期高校武德教育所面临的困境进行理性分析,从时代观望、教化与超越二个维度阐释了新时代高校武德教育的内涵。新时代高校武德教育的教化在于培养自由、个性、全面的武术人。

关键词：新时代武德教育责任与使命

Clean and effective removal of Cl(-I)from strongly acidic wastewater by PbO_(2)

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Journal of Environmental Sciences 2022年第10期34卷 1-8页

作者： Jinmin zhao Linghao Kong Xingyun Hu xianjia Peng State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Recycling strongly acidic wastewater as diluted H_(2)SO_(4) after contaminants contained being removed was previously proposed,however,Cl(-I),a kind of contaminant contained in strongly acidic wastewater,is difficult to remove,which severely degrades the quality of recycled H_(2)SO_(4).In this study,the removal of Cl(-I)using PbO_(2) was investigated and the involved mechanisms were *** removal efficiency of Cl(-I)reached 93.38%at 50℃ when PbO_(2)/Cl(-I)mole ratio reached 2:*** identification of reaction products shows that Cl(-I)was oxidized to Cl_(2),and PbO_(2) was reduced to PbSO_(4).Cl_(2) was absorbed by NaOH to form NaClO,which was used for the regeneration of PbO_(2) from the generated PbSO_(4).Cl(-I)was removed through two pathways,i.e.,surface oxidation and•OH radical oxidation.•OH generated by the reaction of PbO_(2) and OH−plays an important role in Cl(-I)*** regenerated PbO_(2) had excellent performance to remove Cl(-I)after six-time *** study provided an in-depth understanding on the effective removal of Cl(-I)by the oxidation method.

关键词： Cl(-I)removal Strongly acidic wastewater Cl•radicals •OH radicals PbO_(2)regeneration

Preparation of high concentration polyaluminum chloride with high content of Al_b or Al_c

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Journal of Environmental Sciences 2009年第10期21卷 1342-1346页

作者： zhao Changwei ZHANG Jingbo LUAN zhaokun PENG xianjia REN Xiaojing Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. School of Chemical and Environment Engineering China University of Mining and Technology Beijing 100083 China

A novel membrane distillation concentration method was used m prepare high concentration polyaluminum chloride （PAC1） with high content of AID or Ale. 2.52 mol/L PACl1 with 88% Alb and 2.38 mol/L PACl2 with 61% Ale were successfully prepared. Three coagulants, AlCl3, PACl1 and PACl2 were investigated on their hydrolysis behavior and speciation under different conditions. The effects of pH and dilution ratio on Al species distribution were investigated by ferron assay. Experimental result showed that pH had a significant effect on Al species distribution for the three coagulants. Dilution ratio had little effects on Alb and Alc distribution in whole dilution process except the beginning for PACl1 and PACl2. The results indicated that transformation of Al depends largely on their original composition. AlCl3 was the most unstable coagulant among these three coagulants during hydrolysis process. PACl1 and PACl2 with significant amounts of highly charged and stable polynuclear aluminum hydrolysis products were less affected by the hydrolysis conditions and could maintain high speciation stability under various conditions.

关键词： polyaluminum chloride membrane distillation Al species distribution

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离心泵故障及其诊断方法研究

石化技术 2017年第8期24卷 13-13页

作者：赵先甲中国石油独山子石化公司供水供电公司西安石油大学

针对目前离心泵运行使用过程中出现的故障,分析了离心泵的故障成因,并提出了相应的故障诊断方法,其目的是为相关建设者提供一些理论依据。

关键词：离心泵人工神经网络诊断解析模型分析方法