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Copyright of Bulletin of Botanical Research is the property of Bulletin of Botanical Research Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Xi'an Jiaotong University (Medical Sciences) is the property of Xian Jiaotong University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science & Technology of Food Industry is the property of Science & Technology of Food Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] The aim of this study is to reveal the spatial and temporal patterns of nonlinear impact of changes in territorial development intensity on the evolution of ecological security, provide a scientific basis for promoting the high-quality development of the Wuling Mountain Area, and to build a strong ecological security barrier in the upper reaches of the Yangtze River. [Methods] The Wuling Mountain Area, a national key ecological functional area, was taken as the research object, the comprehensive assessment system of territorial development intensity and ecological security was firstly constructed. Then the spatial Dubin model was used to analyze the spatial spillover effect of territorial development intensity on ecological security. The threshold model was used to clarify the nonlinear relationship between the two under multiple constraints. [Results] The mean value of territorial development intensity increased from 0.195 in 2000 to 0.273 in 2020, and the mean value of ecological security index increased from 0.282 in 2000 to 0.438 in 2020, both of which showed an increasing trend of fluctuation. There was a positive spatial spillover effect between territorial development intensity and ecological security. The spillover effect of territorial development intensity on the exponential growth of ecological security in this county was significantly stronger than that in neighboring counties, overall driving the positive evolution of ecological security level in Wuling Mountain Area. The improvement of territorial development intensity had interval effect on ecological security, showing an inverted U-shaped curve relationship of ‘strengthening-weakening’. If the threshold value was between 0.158 to 0.309, the territorial development had a significant threshold effect on building the ecological security barrier. [Conclusion] During the study period, the territorial development intensity and its threshold in the Wuling Mountain Area gradually increased, and there was obvious spatial and temporal heterogeneity in the degree of impact on ecological security, so that setting the territorial development intensity interval according to local conditions became the key to optimizing the new pattern of land spatial development and protection. [ABSTRACT FROM AUTHOR]

Copyright of Geography & Geographic Information Science is the property of Geography & Geo-Information Science Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Practical Medicine / Shiyong Yixue Zazhi is the property of Journal of Practical Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Clinical Nursing in Practice is the property of Journal of Clinical Nursing in Practice (Editorial Board, Shanghai Jiao Tong University Press) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Laser Technology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Tea Science is the property of Journal of Tea Science Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Brewing is the property of China Brewing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Southern Agriculture is the property of Journal of Southern Agriculture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

目的：探讨Sv2／Rv3指数、V2导联移行比在流出道室性早搏（PVB）或室性心动过速（VT）起源部位鉴别中的应用价值。方法选择成功射频消融的流出道PVB或VT患者60例，根据消融靶点确定为左心室起源15例、右心室起源45例。回顾性分析患者12导联心电图资料，计算Sv2／Rv3指数和V2导联移行比，并比较二者鉴别流出道PVB或VT起源部位敏感性的差异。结果 Sv2／Rv3指数鉴别流出道PVB或VT患者起源部位的敏感性为88．3％（53／60），起源部位为左心室13例（86．7％）、右心室40例（88．9％）；V2导联移行比鉴别流出道PVB或VT患者起源部位的敏感性为85．0％（51／60），起源部位为左心室12例（80．0％）、右心室39例（86．7％）；两种指标鉴别起源部位的敏感性比较，P均＞0．05。结论 Sv2／Rv3指数、V2导联移行比均可较好地鉴别流出道PVB或VT的起源部位。 [ABSTRACT FROM AUTHOR]

目的：探讨Sv2／Rv3指数、胸前导联移行区指数在鉴别左、右室流出道室性心动过速（VT）／室性早搏（PVB）中的价值。方法60例流出道VT／PVB患者，通过体表心电图检查测算Sv2／Rv3指数和胸前导联移行区指数，并以射频消融术中电生理检查结果为金标准，计算用Sv2／Rv3指数和胸前导联移行区指数定位VT／PVB起源部位的敏感性、特异性、阳性预测值和阴性预测值。结果根据胸前导联移行区指数行VT／PVB定位，符合率为81．7％（49／60），其中对右室流出道VT／PVB的符合率为82．2％（37／45），对左室流出道VT／PVB的符合率为80％（12／15），敏感度80％，特异度93．2％，阳性预测值75％，阴性预测值93．2％。根据Sv2／Rv3指数行VT／PVB定位，符合率为85％（51／60）。其中对右室流出道VT／PVB的符合率为84．4％（38／45），对左室流出道VT／PVB的符合率为86．7％（13／15），敏感度86．7％，特异度93．3％，阳性预测值81．3％，阴性预测值95．4％。 Sv2／Rv3指数、胸前导联移行区指数上述指标相比差异无统计学意义。结论 Sv2／Rv3指数、胸前导联移行区指数在鉴别左、右室流出道VT／PVB方面有较好的应用价值。 [ABSTRACT FROM AUTHOR]