In order to investigate whether an air–water plasma jet is beneficial to improve the efficiency of inactivation, a series of experiments were done using a ring-needle plasma jet. The water content in the working gas...In order to investigate whether an air–water plasma jet is beneficial to improve the efficiency of inactivation, a series of experiments were done using a ring-needle plasma jet. The water content in the working gas（air） was accurately measured based on the Karl Fischer method. The effects of water on the production of OH（A;Σ;–X;Π;） and O（3p;P–3s;S） were also studied by optical emission spectroscopy. The results show that the water content is in the range of 2.53–9.58 mg l;, depending on the gas/water mixture ratio. The production of OH（A;Σ;–X;Π;） rises with the increase of water content, whereas the O（3p;P–3s;S） shows a declining tendency with higher water content. The sterilization experiments indicate that this air–water plasma jet inactivates the P. digitatum spores very effectively and its efficiency rises with the increase of the water content. It is possible that OH（A;Σ;–X;Π;） is a more effective species in inactivation than O（3p;P–3s;S） and the water content benefit the spore germination inhibition through rising the OH（A;Σ;–X;Π;） production. The maximum of the inactivation efficacy is up to 93% when the applied voltage is -6.75 kV and the water content is 9.58 mg l;.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
目的:分析心电图P波参数对高血压心房颤动(Atrial fibrillation,AF)患者消融术后复发的预测价值。方法:回顾性分析2023年1月至2024年10月我院首次接受消融术的87例高血压AF患者资料,参考术后12 m内是否复发分复发组(21例)和非复发组(66...目的:分析心电图P波参数对高血压心房颤动(Atrial fibrillation,AF)患者消融术后复发的预测价值。方法:回顾性分析2023年1月至2024年10月我院首次接受消融术的87例高血压AF患者资料,参考术后12 m内是否复发分复发组(21例)和非复发组(66例),比较两组P波终末电势(P-wave terminal force in lead V1,PtfV1)、P波离散度(P-wave dispersion,Pd)、P波变异(P-wave variation,Pv)及最大P波时限(Maximum P-wave duration,Pmax),分析上述指标与术后复发的关系及预测价值。结果:与非复发组对比,复发组Pd、Pv、Pmax均更高(P<0.05),但对比两组PtfV1,差异无统计学意义(P>0.05);多因素Logistic回归分析显示,Pd、Pv、Pmax与高血压AF患者术后复发显著相关(P<0.05);绘制受试者工作特征曲线结果显示,Pd、Pv、Pmax三者联合预测高血压AF患者复发的曲线下面积为0.840,均高于单一指标预测(P<0.05)。结论:Pd、Pv、Pmax三者联合在高血压AF患者术后复发中预测价值较高。展开更多
基金supported by National Natural Science Foundation of China (NSFC) under Grants No. 51407020National Key Technology Research and Development Program of the Ministry of Science and Technology of China under Grants No. 2014BAC13B05Visiting Scholarship of State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University) No. 2007DA10512716404
文摘In order to investigate whether an air–water plasma jet is beneficial to improve the efficiency of inactivation, a series of experiments were done using a ring-needle plasma jet. The water content in the working gas（air） was accurately measured based on the Karl Fischer method. The effects of water on the production of OH（A;Σ;–X;Π;） and O（3p;P–3s;S） were also studied by optical emission spectroscopy. The results show that the water content is in the range of 2.53–9.58 mg l;, depending on the gas/water mixture ratio. The production of OH（A;Σ;–X;Π;） rises with the increase of water content, whereas the O（3p;P–3s;S） shows a declining tendency with higher water content. The sterilization experiments indicate that this air–water plasma jet inactivates the P. digitatum spores very effectively and its efficiency rises with the increase of the water content. It is possible that OH（A;Σ;–X;Π;） is a more effective species in inactivation than O（3p;P–3s;S） and the water content benefit the spore germination inhibition through rising the OH（A;Σ;–X;Π;） production. The maximum of the inactivation efficacy is up to 93% when the applied voltage is -6.75 kV and the water content is 9.58 mg l;.
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。
文摘目的:分析心电图P波参数对高血压心房颤动(Atrial fibrillation,AF)患者消融术后复发的预测价值。方法:回顾性分析2023年1月至2024年10月我院首次接受消融术的87例高血压AF患者资料,参考术后12 m内是否复发分复发组(21例)和非复发组(66例),比较两组P波终末电势(P-wave terminal force in lead V1,PtfV1)、P波离散度(P-wave dispersion,Pd)、P波变异(P-wave variation,Pv)及最大P波时限(Maximum P-wave duration,Pmax),分析上述指标与术后复发的关系及预测价值。结果:与非复发组对比,复发组Pd、Pv、Pmax均更高(P<0.05),但对比两组PtfV1,差异无统计学意义(P>0.05);多因素Logistic回归分析显示,Pd、Pv、Pmax与高血压AF患者术后复发显著相关(P<0.05);绘制受试者工作特征曲线结果显示,Pd、Pv、Pmax三者联合预测高血压AF患者复发的曲线下面积为0.840,均高于单一指标预测(P<0.05)。结论:Pd、Pv、Pmax三者联合在高血压AF患者术后复发中预测价值较高。
