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基于PageRank算法的学者影响力研究
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作者 李柏树 司守奎 孙玺菁 《信息工程期刊(中英文版)》 2018年第1期8-14,共7页
本文在分析PageRank算法原理的基础上,将基于计算文献重要性的PageRank算法应用于分析学者影响力,使用2014年美国大学生数学建模大赛“运用网络测量影响力”一题的数据,对相互之间存在合作关系的各个学者的影响力进行评价,最终给出学者... 本文在分析PageRank算法原理的基础上,将基于计算文献重要性的PageRank算法应用于分析学者影响力,使用2014年美国大学生数学建模大赛“运用网络测量影响力”一题的数据,对相互之间存在合作关系的各个学者的影响力进行评价,最终给出学者影响力排名结果。随后又在计算的基础上对所使用的算法进行了灵敏度分析,分析表明,本文使用的PageRank算法可以得到客观稳定的学者影响力排名结果。并且通过研究发现运用PageRank算法分析网络图中节点的重要性可以运用到完全不同的其他网络数据上,对系统中个体的重要性进行分析。 展开更多
关键词 PAGERANK算法 邻接矩阵 状态转移矩阵
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Quality assessment in competition-based software crowdsourcing
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作者 Zhenghui HU Wenjun WU +2 位作者 Jie LUO Xin WANG boshu li 《Frontiers of Computer Science》 SCIE EI CSCD 2020年第6期17-30,共14页
Quality assessment is a critical component incrowdsourcing-based software engineering(CBSE)as soft-ware products arc developed by the crowd with unknownor varied skills and motivations.In this paper.we proposea novel ... Quality assessment is a critical component incrowdsourcing-based software engineering(CBSE)as soft-ware products arc developed by the crowd with unknownor varied skills and motivations.In this paper.we proposea novel metric called the project score to measure the perfor-mance of projects and the quality of products for compctition-based software crowdsourcing devclopment(CBSCD)activ-ities.To the best of our knowledge,this is the first work to deal with the quality issue of CBSE in the perspective ofprojccts instead of contcsts.In particular,we develop a hi-crarchical quality evaluation framework for CBSCD projects and come up with two metric aggregatibn modcls for projectscores.The first model is a modified squale model that canlocate the sofiware modules of poor quality,and the secondone is a clustering-based aggregation model,which takes dif-ferent impacts of phases into account.To test the effective-ness of the proposed metrics.we conduct an empirical studyon TopCoder,which is a famous CBSCD platform.Resultsshow that the proposed project score is a strong indicator ofthe performance and product quality of CBSCD projects.wealso find that the clustering-based aggregation model outpcr-forms the Squale one by increasing the percentage of the per-formance evaluation criterion of aggregation models by anadditional 29%.Our approach to quality assessment for CB-sCD projects could potentially facilitate software managersto assess the overall quality of a crowdsourced project con-sisting of programming contests. 展开更多
关键词 crowdsourcing software engineering.productquality.competition evaluation framework metric aggregation
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Efficient CRISPR/Cas9-mediated genome editing in sheepgrass(Leymus chinensis) 被引量:1
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作者 Zhelong lin Lei Chen +12 位作者 Shanjie Tang Mengjie Zhao Tong li Jia You Changqing You boshu li Qinghua Zhao Dongmei Zhang Jianli Wang Zhongbao Shen Xianwei Song Shuaibin Zhang Xiaofeng Cao 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2023年第11期2416-2420,共5页
The lack of genome editing platforms has hampered efforts to study and improve forage crops that can be grown on lands not suited to other crops.Here,we established efficient Agrobacterium-mediated clustered regularly... The lack of genome editing platforms has hampered efforts to study and improve forage crops that can be grown on lands not suited to other crops.Here,we established efficient Agrobacterium-mediated clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated nuclease 9(Cas9)genome editing in a perennial,stress-tolerant forage grass,sheepgrass(Leymus chinensis).By screening for active single-guide RNAs(sg RNAs),accessions that regenerate well,suitable Agrobacterium strains,and optimal culture media,and co-expressing the morphogenic factor Ta WOX5,we achieved 11%transformation and 5.83%editing efficiency in sheepgrass.Knocking out Teosinte Branched1(TB1)significantly increased tiller number and biomass.This study opens avenues for studying gene function and breeding in sheepgrass. 展开更多
关键词 AGROBACTERIUM genetic transformation genome editing Lc TB1 sheepgrass
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Anthocyanin-assisted Agrobacterium infiltration for the rapid evaluation of genome editing efficiencies across multiple plant species 被引量:1
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作者 Sinian Xing Yu Sun +4 位作者 boshu li Hongchao li Kevin T.Zhao Kunling Chen Caixia Gao 《National Science Open》 2023年第5期11-24,共14页
CRISPR-based genome editing technologies continue to drive major advances in life sciences.A major challenge for realizing widespread use of genome editing in plants and agriculture is establishing methods that enable... CRISPR-based genome editing technologies continue to drive major advances in life sciences.A major challenge for realizing widespread use of genome editing in plants and agriculture is establishing methods that enable the rapid,comprehensive,and precise evaluation of editing technologies using transient methods.Here we report a new and rapid genome editing evaluation method using Agrobacterium infiltration techniques to enable broad-spectrum,simplistic,and precise assessments of genome editing efficiencies.We employed an anthocyanin marker to facilitate visual screenings of genome-edited cells for use in adult strawberry fruits as well as tomato fruits,cotton leaves,and sugar beet leaves.Using this method,we demonstrate the ability to quickly measure genome editing efficiencies mediated by SpCas9,LbCas12a,A3A-PBE,ABE8e,and PPE.This new method will allow researchers to rapidly and easily evaluate genome editing tools across a broad spectrum of plant species,further expediting the development of genome-edited agricultural crops. 展开更多
关键词 genome editing Agrobacterium infiltration ANTHOCYANIN transient transformation geminivirus replicon strawberry tomato
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Highly efficient heritable genome editing in wheat using an RNA virus and bypassing tissue culture. 被引量:20
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作者 Tingdong li Jiacheng Hu +8 位作者 Yu Sun boshu li Dingliang Zhang Wenli li Jinxing liu Dawei li Caixia Gao Yongliang Zhang Yanpeng Wang 《Molecular Plant》 SCIE CAS CSCD 2021年第11期1787-1798,共12页
Genome editing provides novel strategies for improving plant traits,but relies on current genetic transformation and plant regeneration procedures,which can be inefficient.We have engineered a barley stripe mosaic vir... Genome editing provides novel strategies for improving plant traits,but relies on current genetic transformation and plant regeneration procedures,which can be inefficient.We have engineered a barley stripe mosaic virus(BSMV)-based sgRNA delivery vector(BSMV-sg)that is effective in performing heritable genome editing in Cas9-transgenic wheat plants.Mutated progenies were present in the next generation at frequencies ranging from 12.9%to 100%in three different wheat varieties,and 53.8%to 100%of mutants were virus-free.We also achieved multiplex mutagenesis in progeny using a pool of BSMV-sg vectors harboring different sgRNAs.Furthermore,we devised a virus-induced transgene-free editing procedure(VITF-Edit)to generate Cas9-free wheat mutants by crossing BSMV-infected Cas9-transgenic wheat pollen with wild-type wheat.Our study provides a robust,convenient and tissue culture-free approach for genome editing in wheat through virus infection. 展开更多
关键词 heritable genome editing BSMV common wheat tissue culture-free multiplex editing
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