在软件缺陷预测过程中,训练集质量是影响预测结果的关键因素。近几年,训练集选择也成为跨项目缺陷预测和跨版本缺陷预测等场景下的研究热点。然而,现有研究大多针对单一预测场景,可能会在一定程度上影响训练集质量。基于跨项目缺陷预测...在软件缺陷预测过程中,训练集质量是影响预测结果的关键因素。近几年,训练集选择也成为跨项目缺陷预测和跨版本缺陷预测等场景下的研究热点。然而,现有研究大多针对单一预测场景,可能会在一定程度上影响训练集质量。基于跨项目缺陷预测和跨版本缺陷预测两个场景,从数据分布角度提出一种基于相似性度量的训练集推荐(similarity-based training set recommendation,STSR)方法。采用聚类将候选源项目与目标项目划分为相同个数的簇,计算簇心之间的欧氏距离衡量数据集的相似度,对目标项目进行抽样,计算候选源项目与抽样目标项目缺陷率的差值,并计算干扰类比率,最终实现训练集推荐。在PROMISE数据集的11个项目共40个版本上进行实验验证,采用F1和AUC指标评价STSR方法的性能。实验结果表明,与跨版本缺陷预测相比,STSR方法的F1更优,在AUC指标上两者相当;在时间代价方面,STSR方法的最长推荐时间为5.09 s,是可接受的。展开更多
As the rapid development of more powerful and safer lithiumion batteries, the mechanism study of gases evolution is attacking more and more attention in recent years. Especially under overcharge/discharge and/or high-...As the rapid development of more powerful and safer lithiumion batteries, the mechanism study of gases evolution is attacking more and more attention in recent years. Especially under overcharge/discharge and/or high-temperature working condition.展开更多
Urban water system has a certain orientation for the formation and morphological evolution and development of urban space,and old residential areas are often built along the vein of the water system,which is one of th...Urban water system has a certain orientation for the formation and morphological evolution and development of urban space,and old residential areas are often built along the vein of the water system,which is one of the main media to continue the historical context of the city and create the urban regional landscape in the context of urban renewal.The old residential area of the Tiaodeng River basin in the old city of Yongchuan is taken as the research object.Under the background of urban double cultivation,community transformation is combined with urban waterfront space transformation.Around the influencing factors such as water pollution,monotonous function,and lack of style,the existing problems of the site are analyzed and summarized.Additionally,six major strategies are put forward to achieve the quality and function improvement of the old residential area in the Tiaodeng River basin:creating a water town type of landscape style,river course governance,traffic optimization,shaping cultural interface,updating business formats,and improving supporting facilities.展开更多
文摘在软件缺陷预测过程中,训练集质量是影响预测结果的关键因素。近几年,训练集选择也成为跨项目缺陷预测和跨版本缺陷预测等场景下的研究热点。然而,现有研究大多针对单一预测场景,可能会在一定程度上影响训练集质量。基于跨项目缺陷预测和跨版本缺陷预测两个场景,从数据分布角度提出一种基于相似性度量的训练集推荐(similarity-based training set recommendation,STSR)方法。采用聚类将候选源项目与目标项目划分为相同个数的簇,计算簇心之间的欧氏距离衡量数据集的相似度,对目标项目进行抽样,计算候选源项目与抽样目标项目缺陷率的差值,并计算干扰类比率,最终实现训练集推荐。在PROMISE数据集的11个项目共40个版本上进行实验验证,采用F1和AUC指标评价STSR方法的性能。实验结果表明,与跨版本缺陷预测相比,STSR方法的F1更优,在AUC指标上两者相当;在时间代价方面,STSR方法的最长推荐时间为5.09 s,是可接受的。
基金partially supported by the National Natural Science Foundation of China (grant no. 22021001, 22179111)the Ministry of Science and Technology of China (grant no. 2021YFA1201900)+3 种基金the Basic Research Program of Tan Kah Kee Innovation Laboratory (grant no. RD2021070401)the Principal Fund from Xiamen University (grant no. 20720210015)the Fundamental Research Funds for the Central Universities (grant no. 20720220010)the National Natural Science Foundation of China (grant no. 22202082)。
文摘As the rapid development of more powerful and safer lithiumion batteries, the mechanism study of gases evolution is attacking more and more attention in recent years. Especially under overcharge/discharge and/or high-temperature working condition.
基金the Chongqing Social Science Planning Project(2022NDYB83)the National Natural Science Foundation of China(52008062).
文摘Urban water system has a certain orientation for the formation and morphological evolution and development of urban space,and old residential areas are often built along the vein of the water system,which is one of the main media to continue the historical context of the city and create the urban regional landscape in the context of urban renewal.The old residential area of the Tiaodeng River basin in the old city of Yongchuan is taken as the research object.Under the background of urban double cultivation,community transformation is combined with urban waterfront space transformation.Around the influencing factors such as water pollution,monotonous function,and lack of style,the existing problems of the site are analyzed and summarized.Additionally,six major strategies are put forward to achieve the quality and function improvement of the old residential area in the Tiaodeng River basin:creating a water town type of landscape style,river course governance,traffic optimization,shaping cultural interface,updating business formats,and improving supporting facilities.
