目的分析脉压对不同年龄急性缺血性脑卒中(AIS)患者血管内介入治疗短期预后的预测作用。方法筛选2018年1月至2022年6月在临沂市人民医院进行血管内介入治疗的AIS患者801例,根据年龄和治疗前后脉压差值分为高值高龄组[A组,212例,脉压差值...目的分析脉压对不同年龄急性缺血性脑卒中(AIS)患者血管内介入治疗短期预后的预测作用。方法筛选2018年1月至2022年6月在临沂市人民医院进行血管内介入治疗的AIS患者801例,根据年龄和治疗前后脉压差值分为高值高龄组[A组,212例,脉压差值≥15 mm Hg(1 mm Hg=0.133 kPa),年龄≥60岁],高值低龄组(B组,188例,脉压差值≥15 mm Hg,年龄<60岁),低值高龄组(C组,205例,脉压差值<15 mm Hg,年龄≥60岁),低值低龄组(D组,196例,脉压差值<15 mm Hg,年龄<60岁)。收集一般临床资料,采用ROC曲线分析预测效果。结果A组年龄明显高于B组、D组,糖尿病、治疗前美国国立卫生研究院卒中量表(NIHSS)评分、脑梗死、灌注综合征、皮下血肿发生率明显高于D组,住院时间、治疗后NIHSS评分、肾功能损伤、不良事件发生率明显高于C组、D组(P<0.05),A组和B组治疗前后脉压差值明显高于C组、D组(P<0.05);C组糖尿病比例明显高于D组(P<0.05)。B组灌注综合征、不良事件发生率明显高于D组,肾功能损伤发生率明显高于C组、D组(P<0.05)。年龄、治疗前脉压、治疗后收缩压、治疗后脉压、治疗前后脉压差值是AIS患者预后的危险因素(P<0.05,P<0.01)。治疗前后脉压差值预测AIS患者短期预后的最佳截断值为12.81 mm Hg,曲线下面积为0.722(95%CI:0.698~0.746)。结论治疗前后脉压差值能够对不同年龄AIS患者血管内介入治疗短期预后进行有效预测。展开更多
In this paper, the problem of moving object detection in aerial video is addressed. While motion cues have been extensively exploited in the literature, how to use spatial information is still an open problem. To deal...In this paper, the problem of moving object detection in aerial video is addressed. While motion cues have been extensively exploited in the literature, how to use spatial information is still an open problem. To deal with this issue, we propose a novel hierarchical moving target detection method based on spatiotemporal saliency. Temporal saliency is used to get a coarse segmentation, and spatial saliency is extracted to obtain the object＇s appearance details in candidate motion regions. Finally, by combining temporal and spatial saliency information, we can get refined detection results. Additionally, in order to give a full description of the object distribution, spatial saliency is detected in both pixel and region levels based on local contrast. Experiments conducted on the VIVID dataset show that the proposed method is efficient and accurate.展开更多
Ecological culture has a low-carbon attribute,which coincides with the concepts of energy conservation and emission reduction in low-carbon tourism.Analyzing the differences in the public perception of the two is of g...Ecological culture has a low-carbon attribute,which coincides with the concepts of energy conservation and emission reduction in low-carbon tourism.Analyzing the differences in the public perception of the two is of great significance for achieving the carbon neutral goal of tourism.Firstly,the views of nature,equality and ecology in ecological culture,as well as the cognition and participation willingness for low-carbon tourism were identified by using the principal component analysis method.Secondly,all samples were divided into four types of ecological culture cognition:sufficient,relatively sufficient,general and poorer,by the K-means clustering method.Thirdly,significant differences in the low-carbon tourism cognition among different types were revealed by using the ANOVA method.Finally,the influences of the main demographic characteristics on the low-carbon tourism cognition were analyzed.This analysis showed that gender,age,education level and income level had significant differences in some aspects of low-carbon tourism cognition and participation willingness,especially education level.On this basis,several corresponding strategies were put forward for managing the cognitive differences of the different types,which could contribute to the realization of the carbon neutral vision of tourism.展开更多
低碳旅游研究是气候变化背景下旅游研究的前沿问题和关键领域。以Web of Science核心合集、CSSCI及CSCD数据库中关于低碳旅游的文献为基础,利用CiteSpace软件、Alluvial Generator程序、Excel统计功能进行国内外低碳旅游研究的可视化分...低碳旅游研究是气候变化背景下旅游研究的前沿问题和关键领域。以Web of Science核心合集、CSSCI及CSCD数据库中关于低碳旅游的文献为基础,利用CiteSpace软件、Alluvial Generator程序、Excel统计功能进行国内外低碳旅游研究的可视化分析。结果表明:国外低碳旅游研究起步时间早,始于系统外部与旅游业相互作用视角,以生态环境和工程技术学科为基础,主要为了解决"碳中和"等现实问题,已形成固定的区域性合作网络;国外研究以定量研究为基本范式,其关键文献全部围绕旅游碳排放的测算,且已经形成了较完善的减碳体系。而国内低碳旅游研究与国外的快速发展时期相吻合,是从旅游业可持续发展角度开展研究,依附于旅游及经管类学科,尚未形成固定的合作网络;国内研究在概念理论的定性研究方面优于国外,但整体研究视角较为单一且未形成完整体系,其关键文献包含基础概念、理论体系、碳排放测算、影响因素分析等诸多方面。展开更多
文摘目的分析脉压对不同年龄急性缺血性脑卒中(AIS)患者血管内介入治疗短期预后的预测作用。方法筛选2018年1月至2022年6月在临沂市人民医院进行血管内介入治疗的AIS患者801例,根据年龄和治疗前后脉压差值分为高值高龄组[A组,212例,脉压差值≥15 mm Hg(1 mm Hg=0.133 kPa),年龄≥60岁],高值低龄组(B组,188例,脉压差值≥15 mm Hg,年龄<60岁),低值高龄组(C组,205例,脉压差值<15 mm Hg,年龄≥60岁),低值低龄组(D组,196例,脉压差值<15 mm Hg,年龄<60岁)。收集一般临床资料,采用ROC曲线分析预测效果。结果A组年龄明显高于B组、D组,糖尿病、治疗前美国国立卫生研究院卒中量表(NIHSS)评分、脑梗死、灌注综合征、皮下血肿发生率明显高于D组,住院时间、治疗后NIHSS评分、肾功能损伤、不良事件发生率明显高于C组、D组(P<0.05),A组和B组治疗前后脉压差值明显高于C组、D组(P<0.05);C组糖尿病比例明显高于D组(P<0.05)。B组灌注综合征、不良事件发生率明显高于D组,肾功能损伤发生率明显高于C组、D组(P<0.05)。年龄、治疗前脉压、治疗后收缩压、治疗后脉压、治疗前后脉压差值是AIS患者预后的危险因素(P<0.05,P<0.01)。治疗前后脉压差值预测AIS患者短期预后的最佳截断值为12.81 mm Hg,曲线下面积为0.722(95%CI:0.698~0.746)。结论治疗前后脉压差值能够对不同年龄AIS患者血管内介入治疗短期预后进行有效预测。
基金co-supported by the National Natural Science Foundation of China (Nos.61005028,61175032,and 61101222)
文摘In this paper, the problem of moving object detection in aerial video is addressed. While motion cues have been extensively exploited in the literature, how to use spatial information is still an open problem. To deal with this issue, we propose a novel hierarchical moving target detection method based on spatiotemporal saliency. Temporal saliency is used to get a coarse segmentation, and spatial saliency is extracted to obtain the object＇s appearance details in candidate motion regions. Finally, by combining temporal and spatial saliency information, we can get refined detection results. Additionally, in order to give a full description of the object distribution, spatial saliency is detected in both pixel and region levels based on local contrast. Experiments conducted on the VIVID dataset show that the proposed method is efficient and accurate.
基金The Special Research Project on Science and Technology Strategy of Shanxi Province(202104031402065,202104031402061)。
文摘Ecological culture has a low-carbon attribute,which coincides with the concepts of energy conservation and emission reduction in low-carbon tourism.Analyzing the differences in the public perception of the two is of great significance for achieving the carbon neutral goal of tourism.Firstly,the views of nature,equality and ecology in ecological culture,as well as the cognition and participation willingness for low-carbon tourism were identified by using the principal component analysis method.Secondly,all samples were divided into four types of ecological culture cognition:sufficient,relatively sufficient,general and poorer,by the K-means clustering method.Thirdly,significant differences in the low-carbon tourism cognition among different types were revealed by using the ANOVA method.Finally,the influences of the main demographic characteristics on the low-carbon tourism cognition were analyzed.This analysis showed that gender,age,education level and income level had significant differences in some aspects of low-carbon tourism cognition and participation willingness,especially education level.On this basis,several corresponding strategies were put forward for managing the cognitive differences of the different types,which could contribute to the realization of the carbon neutral vision of tourism.
文摘低碳旅游研究是气候变化背景下旅游研究的前沿问题和关键领域。以Web of Science核心合集、CSSCI及CSCD数据库中关于低碳旅游的文献为基础,利用CiteSpace软件、Alluvial Generator程序、Excel统计功能进行国内外低碳旅游研究的可视化分析。结果表明:国外低碳旅游研究起步时间早,始于系统外部与旅游业相互作用视角,以生态环境和工程技术学科为基础,主要为了解决"碳中和"等现实问题,已形成固定的区域性合作网络;国外研究以定量研究为基本范式,其关键文献全部围绕旅游碳排放的测算,且已经形成了较完善的减碳体系。而国内低碳旅游研究与国外的快速发展时期相吻合,是从旅游业可持续发展角度开展研究,依附于旅游及经管类学科,尚未形成固定的合作网络;国内研究在概念理论的定性研究方面优于国外,但整体研究视角较为单一且未形成完整体系,其关键文献包含基础概念、理论体系、碳排放测算、影响因素分析等诸多方面。
