为提高冰雹探测算法(Hail Detection Algorithm, HDA)产品的可用性,针对2015—2020年普洱地区监测到的22次冰雹个例,利用新一代雷达业务应用软件ROSE2.0对相关雷达基数据进行回放及产品分析,以命中率、虚警率、临界成功指数为指标对HDA...为提高冰雹探测算法(Hail Detection Algorithm, HDA)产品的可用性,针对2015—2020年普洱地区监测到的22次冰雹个例,利用新一代雷达业务应用软件ROSE2.0对相关雷达基数据进行回放及产品分析,以命中率、虚警率、临界成功指数为指标对HDA算法在普洱地区的识别效果进行评估并给出本地化参数配置方案。结果表明:HDA算法在普洱地区命中率接近100%,但虚警现象非常普遍,使用强冰雹概率(Probability of Severe Hail, POSH)的预警效果优于任意大小冰雹概率(Probability of Hail, POH),且冰雹尺寸越大POSH虚警的概率越低。进一步使用模拟测评法对POSH算法的适配参数进行分析,发现正确输入降雹日当天的0℃层和-20℃层高度能有效减少POSH的虚警率及提高临界成功指数;同时使算法预测的最大冰雹直径普遍偏大的情况得到控制,其中,中小冰雹直径偏离百分比减小76.07%,改善效果显著高于大冰雹。此外,增大反射率因子及POSH阈值能有效控制虚警,但也导致漏报次数快速增加,当阈值太大时命中率明显降低,为了保证较高的命中率和临界成功指数,选择Z=50 dBz或POSH=70%为阈值能明显改善HDA算法的识别效果。展开更多
In order to reduce the waste of resources and environmental pollution caused by excessive application of chemical fertilizers, improve the utilization rate of fertilizers, and promote the large-scale and high-quality ...In order to reduce the waste of resources and environmental pollution caused by excessive application of chemical fertilizers, improve the utilization rate of fertilizers, and promote the large-scale and high-quality development of the Chinese rose industry. In this experiment, corn stover biochar, phosphoric acid modified biochar and organic fertilizer were used as test materials, and the effects of mixed application of modified biochar and organic fertilizer on the growth and development of Chinese rose as well as soil physicochemical properties were investigated by using the method of pot planting test. The results showed that modified biochar with organic fertilizer had the most significant effect on the enhancement of soil pH, organic matter content and soil carbon-to-nitrogen ratio. After 120 d of planting, modified biochar with organic fertilizer had the most significant effect on the enhancement of plant height and crown width of Chinese rose;both organic fertilizer and modified biochar with organic fertilizer significantly increased the chlorophyll content of Chinese rose. The number of flowers and the number of branches were the highest in the modified biochar with organic fertilizer treatment. In conclusion, the application of modified biochar with organic fertilizer can better improve the soil pH, and increase the soil organic matter content and carbon-to-nitrogen ratio to change the biological traits of Chinese rose. The results of this study provide a theoretical basis for the reduction of chemical fertilizers and the resource utilization of agricultural wastes and guarantee the sustainable development of the cut flower industry.展开更多
The novel A Rose for Emily is one of the early works of William Faulkner,a famous American southern writer who has won The Nobel Prize in Literature in 1950.Spatial narrative theory analyzes and summarizes the spatial...The novel A Rose for Emily is one of the early works of William Faulkner,a famous American southern writer who has won The Nobel Prize in Literature in 1950.Spatial narrative theory analyzes and summarizes the spatial characteristics of modern and postmodern novels,showing the narrative characteristics of the works that the time is disrupted and suspended,and the space is extended indefinitely.This paper intends to interpret A Rose for Emily from the perspective of spatial narrative theory,and analyze the geological space,social space and text space in the novel,so as to reveal the important role of spatial structure in creating atmosphere and promoting narrative process,in order to better grasp the spatial metaphors in Faulkner’s novels.展开更多
使用医疗信息系统的数据进行睡眠呼吸暂停低通气综合征(OSAHS)预测和分析过程中,存在不平衡数据问题。为此,在现有临床研究的基础上,提出了一种基于ROSE(Random Over Sampling Examples)和C5.0算法的初筛模型。利用收集到的人体测量学...使用医疗信息系统的数据进行睡眠呼吸暂停低通气综合征(OSAHS)预测和分析过程中,存在不平衡数据问题。为此,在现有临床研究的基础上,提出了一种基于ROSE(Random Over Sampling Examples)和C5.0算法的初筛模型。利用收集到的人体测量学指标数据,通过数据预处理,删除异常值并填补缺失值。然后采用ROSE算法对数据进行平衡,利用C5.0分类器对平衡后的数据构建筛查模型,通过十则交叉验证的方法检验模型的筛查效果。实验结果表明,使用该模型进行打鼾患者的OSAHS筛查,可以有效地提高筛查效率。展开更多
[Objective] This study aimed to select suitable cultivars of cut roses with prominent comprehensive performance which is suitable for the commercial promotion in the tropical region of South Hainan Province,including ...[Objective] This study aimed to select suitable cultivars of cut roses with prominent comprehensive performance which is suitable for the commercial promotion in the tropical region of South Hainan Province,including Sanya and the low-altitude area.[Method] Introduction experiment and production test were designed to observe the agronomic and economic traits of cultivars in a rose resources nursery established in Sanya.[Result] Through observation in the resources garden,18 varieties were chosen to conduct the introduction experiment,of which 8 varieties were selected to accomplish the production test.The results of the production test showed that 'Vendela','Golden Emblem','Samantha' and 'Tineke' showed the best adaptability;the cut flower quality of 'Carola','Black Magic' and 'Golden Emblem' belonged to the first grade;the yield of 'Movie Star','Golden Emblem' and 'Black Magic' was more than one million per hm2;except 'Golden Emblem',the vase life of the other seven cultivars was more than 10 days;'Carola','My Choice' and 'Perfume White' had better disease-and insect-resistance;'Carola','Vendela','Rouge Meilland','Tineke','Golden Emblem','Samantha','Perfume White','Saiun','Asagumo' and 'Double Delight' were more resistant to blackspot,while 'Black Magic','Versilla','Alec's Red' and 'Movie Star' were less resistant to blackspot.[Conclusion] Cultivars of cut roses were able to grow and develop normally in the tropical coastal area of Hainan Province,including South Hainan and Sanya,where it was appropriate for the production of cut roses.However,it is necessary to pay attention to the prevention and control of thrips and blackspot.'Black Magic','Carola','Vendela','Rouge Meilland','Golden Emblem','Tineke','Movie Star' and 'Samantha' showed best comprehensive performance,which were thus worthy of large-scale popularization in Hainan Province.展开更多
文摘为提高冰雹探测算法(Hail Detection Algorithm, HDA)产品的可用性,针对2015—2020年普洱地区监测到的22次冰雹个例,利用新一代雷达业务应用软件ROSE2.0对相关雷达基数据进行回放及产品分析,以命中率、虚警率、临界成功指数为指标对HDA算法在普洱地区的识别效果进行评估并给出本地化参数配置方案。结果表明:HDA算法在普洱地区命中率接近100%,但虚警现象非常普遍,使用强冰雹概率(Probability of Severe Hail, POSH)的预警效果优于任意大小冰雹概率(Probability of Hail, POH),且冰雹尺寸越大POSH虚警的概率越低。进一步使用模拟测评法对POSH算法的适配参数进行分析,发现正确输入降雹日当天的0℃层和-20℃层高度能有效减少POSH的虚警率及提高临界成功指数;同时使算法预测的最大冰雹直径普遍偏大的情况得到控制,其中,中小冰雹直径偏离百分比减小76.07%,改善效果显著高于大冰雹。此外,增大反射率因子及POSH阈值能有效控制虚警,但也导致漏报次数快速增加,当阈值太大时命中率明显降低,为了保证较高的命中率和临界成功指数,选择Z=50 dBz或POSH=70%为阈值能明显改善HDA算法的识别效果。
文摘In order to reduce the waste of resources and environmental pollution caused by excessive application of chemical fertilizers, improve the utilization rate of fertilizers, and promote the large-scale and high-quality development of the Chinese rose industry. In this experiment, corn stover biochar, phosphoric acid modified biochar and organic fertilizer were used as test materials, and the effects of mixed application of modified biochar and organic fertilizer on the growth and development of Chinese rose as well as soil physicochemical properties were investigated by using the method of pot planting test. The results showed that modified biochar with organic fertilizer had the most significant effect on the enhancement of soil pH, organic matter content and soil carbon-to-nitrogen ratio. After 120 d of planting, modified biochar with organic fertilizer had the most significant effect on the enhancement of plant height and crown width of Chinese rose;both organic fertilizer and modified biochar with organic fertilizer significantly increased the chlorophyll content of Chinese rose. The number of flowers and the number of branches were the highest in the modified biochar with organic fertilizer treatment. In conclusion, the application of modified biochar with organic fertilizer can better improve the soil pH, and increase the soil organic matter content and carbon-to-nitrogen ratio to change the biological traits of Chinese rose. The results of this study provide a theoretical basis for the reduction of chemical fertilizers and the resource utilization of agricultural wastes and guarantee the sustainable development of the cut flower industry.
文摘The novel A Rose for Emily is one of the early works of William Faulkner,a famous American southern writer who has won The Nobel Prize in Literature in 1950.Spatial narrative theory analyzes and summarizes the spatial characteristics of modern and postmodern novels,showing the narrative characteristics of the works that the time is disrupted and suspended,and the space is extended indefinitely.This paper intends to interpret A Rose for Emily from the perspective of spatial narrative theory,and analyze the geological space,social space and text space in the novel,so as to reveal the important role of spatial structure in creating atmosphere and promoting narrative process,in order to better grasp the spatial metaphors in Faulkner’s novels.
文摘使用医疗信息系统的数据进行睡眠呼吸暂停低通气综合征(OSAHS)预测和分析过程中,存在不平衡数据问题。为此,在现有临床研究的基础上,提出了一种基于ROSE(Random Over Sampling Examples)和C5.0算法的初筛模型。利用收集到的人体测量学指标数据,通过数据预处理,删除异常值并填补缺失值。然后采用ROSE算法对数据进行平衡,利用C5.0分类器对平衡后的数据构建筛查模型,通过十则交叉验证的方法检验模型的筛查效果。实验结果表明,使用该模型进行打鼾患者的OSAHS筛查,可以有效地提高筛查效率。
基金Supported by the National Agricultural Sci-Tech Achievements Transformation Projects(2010GB2E200369)the National Spark Program Project(2011GA800004)~~
文摘[Objective] This study aimed to select suitable cultivars of cut roses with prominent comprehensive performance which is suitable for the commercial promotion in the tropical region of South Hainan Province,including Sanya and the low-altitude area.[Method] Introduction experiment and production test were designed to observe the agronomic and economic traits of cultivars in a rose resources nursery established in Sanya.[Result] Through observation in the resources garden,18 varieties were chosen to conduct the introduction experiment,of which 8 varieties were selected to accomplish the production test.The results of the production test showed that 'Vendela','Golden Emblem','Samantha' and 'Tineke' showed the best adaptability;the cut flower quality of 'Carola','Black Magic' and 'Golden Emblem' belonged to the first grade;the yield of 'Movie Star','Golden Emblem' and 'Black Magic' was more than one million per hm2;except 'Golden Emblem',the vase life of the other seven cultivars was more than 10 days;'Carola','My Choice' and 'Perfume White' had better disease-and insect-resistance;'Carola','Vendela','Rouge Meilland','Tineke','Golden Emblem','Samantha','Perfume White','Saiun','Asagumo' and 'Double Delight' were more resistant to blackspot,while 'Black Magic','Versilla','Alec's Red' and 'Movie Star' were less resistant to blackspot.[Conclusion] Cultivars of cut roses were able to grow and develop normally in the tropical coastal area of Hainan Province,including South Hainan and Sanya,where it was appropriate for the production of cut roses.However,it is necessary to pay attention to the prevention and control of thrips and blackspot.'Black Magic','Carola','Vendela','Rouge Meilland','Golden Emblem','Tineke','Movie Star' and 'Samantha' showed best comprehensive performance,which were thus worthy of large-scale popularization in Hainan Province.