We carried out a general survey of current situations of P.intermedius S.Y.Chen.Results show that P.intermedius S.Y.Chen is distributed in Dongkeng Township,Jingnan Township and Yanxi Township.It covers an area of 262...We carried out a general survey of current situations of P.intermedius S.Y.Chen.Results show that P.intermedius S.Y.Chen is distributed in Dongkeng Township,Jingnan Township and Yanxi Township.It covers an area of 262.51 hm2.The distribution areas are narrow and limited.What's worse,it suffers from serious destruction and has been withered in large areas.Besides,according to current introduction test,it is difficult to survive in other places.In accordance with Exploring the Criteria for Endangered Categories of Bamboo Species from China put forward by Ma Naixun et al from the Research Institute of Subtropical Forestry of Chinese Academy of Forestry(RISFCAF),we propose incorporating P.intermedius S.Y.Chen into vulnerable species for protection.展开更多
针对耦合神经P系统利用脉冲机制实现区域生长依赖于初始种子点选择的问题,提出一种自适应区域生长耦合神经P系统(adaptive region growing coupled neural P systems,ARGCNP)的图像分割方法。该方法利用金豺优化算法(golden jackal opti...针对耦合神经P系统利用脉冲机制实现区域生长依赖于初始种子点选择的问题,提出一种自适应区域生长耦合神经P系统(adaptive region growing coupled neural P systems,ARGCNP)的图像分割方法。该方法利用金豺优化算法(golden jackal optimization,GJO)的全局搜索能力,通过引入四种策略提升GJO的全局寻优性能,从而在图像中寻找最佳阈值点,以优化区域生长中的种子点选择。在实验中,首先通过CEC2017测试函数对改进后的GJO进行性能测试,结果表明改进后的GJO在测试函数上整体性能第一;随后将ARGCNP应用于分割彩色图像和医学图像,以峰值信噪比等三个指标对分割效果进行量化评价,分割结果显示该方法能够提升分割精度及分割结果的稳定性,证明ARGCNP在应用场景下具有的优势,能够满足图像分割需求。展开更多
为了明晰人类活动对冶木河流域水文情势的影响效果,基于冶力关水文站1981—2020年的年径流量和日均流量数据,采用曼宁肯德尔-彭曼(Mann-Kendall-Pettitt,MK-P)突变点检测、水文指标(Indicators of Hydrologic Alteration,IHA)和动态时...为了明晰人类活动对冶木河流域水文情势的影响效果,基于冶力关水文站1981—2020年的年径流量和日均流量数据,采用曼宁肯德尔-彭曼(Mann-Kendall-Pettitt,MK-P)突变点检测、水文指标(Indicators of Hydrologic Alteration,IHA)和动态时间弯曲(Dynamic Time Warping,DTW)算法计算了基准期和黄河流域生态保护和高质量发展重大国家战略实施影响期的水文指标变化情况及两个时期的水文情势相似度。基于全球陆面数据同化系统(Global Land Data Assimilation System,GLDAS)提取冶木河陆地水储量,分析其与径流量的相关关系及变化时间点。研究结果表明:1)冶木河径流量平稳变化点和陆地水储量变化点均为2018年。2)战略实施影响期的径流量大于基准期,径流量平均增大29.79%。3)基准期和战略实施影响期5组水文情势指标的相似度分别为0.025、0.025、0.25、0.1、0,说明冶木河流量极值出现的次数增加,小流量持续情况有所好转。4)战略实施影响期实施的水源涵养措施袭夺了河川基流,减水效果较明显。5)陆地水储量与径流量相关关系较弱。展开更多
文摘We carried out a general survey of current situations of P.intermedius S.Y.Chen.Results show that P.intermedius S.Y.Chen is distributed in Dongkeng Township,Jingnan Township and Yanxi Township.It covers an area of 262.51 hm2.The distribution areas are narrow and limited.What's worse,it suffers from serious destruction and has been withered in large areas.Besides,according to current introduction test,it is difficult to survive in other places.In accordance with Exploring the Criteria for Endangered Categories of Bamboo Species from China put forward by Ma Naixun et al from the Research Institute of Subtropical Forestry of Chinese Academy of Forestry(RISFCAF),we propose incorporating P.intermedius S.Y.Chen into vulnerable species for protection.
文摘针对耦合神经P系统利用脉冲机制实现区域生长依赖于初始种子点选择的问题,提出一种自适应区域生长耦合神经P系统(adaptive region growing coupled neural P systems,ARGCNP)的图像分割方法。该方法利用金豺优化算法(golden jackal optimization,GJO)的全局搜索能力,通过引入四种策略提升GJO的全局寻优性能,从而在图像中寻找最佳阈值点,以优化区域生长中的种子点选择。在实验中,首先通过CEC2017测试函数对改进后的GJO进行性能测试,结果表明改进后的GJO在测试函数上整体性能第一;随后将ARGCNP应用于分割彩色图像和医学图像,以峰值信噪比等三个指标对分割效果进行量化评价,分割结果显示该方法能够提升分割精度及分割结果的稳定性,证明ARGCNP在应用场景下具有的优势,能够满足图像分割需求。
文摘为了明晰人类活动对冶木河流域水文情势的影响效果,基于冶力关水文站1981—2020年的年径流量和日均流量数据,采用曼宁肯德尔-彭曼(Mann-Kendall-Pettitt,MK-P)突变点检测、水文指标(Indicators of Hydrologic Alteration,IHA)和动态时间弯曲(Dynamic Time Warping,DTW)算法计算了基准期和黄河流域生态保护和高质量发展重大国家战略实施影响期的水文指标变化情况及两个时期的水文情势相似度。基于全球陆面数据同化系统(Global Land Data Assimilation System,GLDAS)提取冶木河陆地水储量,分析其与径流量的相关关系及变化时间点。研究结果表明:1)冶木河径流量平稳变化点和陆地水储量变化点均为2018年。2)战略实施影响期的径流量大于基准期,径流量平均增大29.79%。3)基准期和战略实施影响期5组水文情势指标的相似度分别为0.025、0.025、0.25、0.1、0,说明冶木河流量极值出现的次数增加,小流量持续情况有所好转。4)战略实施影响期实施的水源涵养措施袭夺了河川基流,减水效果较明显。5)陆地水储量与径流量相关关系较弱。
