Spectrum map construction,which is crucial in cognitive radio(CR)system,visualizes the invisible space of the electromagnetic spectrum for spectrum-resource management and allocation.Traditional reconstruction methods...Spectrum map construction,which is crucial in cognitive radio(CR)system,visualizes the invisible space of the electromagnetic spectrum for spectrum-resource management and allocation.Traditional reconstruction methods are generally for twodimensional(2D)spectrum map and driven by abundant sampling data.In this paper,we propose a data-model-knowledge-driven reconstruction scheme to construct the three-dimensional(3D)spectrum map under multi-radiation source scenarios.We firstly design a maximum and minimum path loss difference(MMPLD)clustering algorithm to detect the number of radiation sources in a 3D space.Then,we develop a joint location-power estimation method based on the heuristic population evolutionary optimization algorithm.Considering the variation of electromagnetic environment,we self-learn the path loss(PL)model based on the sampling data.Finally,the 3D spectrum is reconstructed according to the self-learned PL model and the extracted knowledge of radiation sources.Simulations show that the proposed 3D spectrum map reconstruction scheme not only has splendid adaptability to the environment,but also achieves high spectrum construction accuracy even when the sampling rate is very low.展开更多
目的探讨温肾护脉汤治疗脓毒症阳脱证的临床疗效及对炎症因子、免疫功能的影响。方法选取本院急诊科收治的160例脓毒症阳脱证患者,按随机数字表法分为观察组和对照组,每组80例。对照组给予西医常规治疗,观察组在对照组治疗基础上加用温...目的探讨温肾护脉汤治疗脓毒症阳脱证的临床疗效及对炎症因子、免疫功能的影响。方法选取本院急诊科收治的160例脓毒症阳脱证患者,按随机数字表法分为观察组和对照组,每组80例。对照组给予西医常规治疗,观察组在对照组治疗基础上加用温肾护脉汤。治疗7 d后,比较2组患者临床疗效、中医证候积分、脓毒症相关性器官功能衰竭评价(sepsis-related organ failure assessment,SOFA)评分、急性生理学和慢性健康状况评价(acute physiology and chronic health evaluation,APACHE)II评分、血清炎症因子水平、免疫功能指标、重症监护病房(intensive care unit,ICU)住院时间及机械通气时间。结果治疗结束后,观察组总有效率为90.0%,显著高于对照组的77.5%(P<0.05)。观察组中医证候积分、SOFA评分、APACHE II评分及血清白细胞(white blood cell,WBC)、降钙素原(procalcitonin,PCT)、超敏C反应蛋白(hypersensitive C-reactive protein,hs-CRP)、肿瘤坏死因子(tumor necrosis factor,TNF)-α、白介素(interleukin,IL)-6水平均显著低于对照组(P<0.05)。观察组CD_(4)^(+)T细胞、CD_(3)^(+)T细胞比例及CD_(4)^(+)/CD_(8)^(+)细胞比值均显著高于对照组(P<0.05)。观察组ICU住院时间、机械通气时间均显著短于对照组(P<0.05)。结论温肾护脉汤能显著改善脓毒症阳脱证患者临床症状,降低炎症因子水平,增强细胞免疫功能,缩短ICU住院时间,降低病死率,疗效确切。展开更多
目的比较腹腔镜胆总管探查术(laparoscopic common bile duct exploration,LCBDE)中间断缝合(interrupted suture,IS)与连续缝合(continuous suture,CS)治疗胆总管结石的安全性和有效性。方法回顾性分析2018年6月至2023年4月我科行LCBD...目的比较腹腔镜胆总管探查术(laparoscopic common bile duct exploration,LCBDE)中间断缝合(interrupted suture,IS)与连续缝合(continuous suture,CS)治疗胆总管结石的安全性和有效性。方法回顾性分析2018年6月至2023年4月我科行LCBDE治疗的104例胆总管结石患者资料,依据缝合方法分为CS组(n=53)和IS组(n=51)。比较两组患者的手术时间、术中出血量、引流管拔出时间、术后胆漏发生率、下床活动时间、饮食恢复时间、术前术后胆总管直径、住院时间。结果CS组的手术时间、术中出血量、引流管拔出时间、术后胆漏发生率均少于IS组(P<0.05)。两组下床活动时间、饮食恢复时间、住院时间比较,差异均无统计学意义(P>0.05)。两组患者术后胆总管直径均明显大于术前(P<0.05)。结论胆管连续缝合技术缩短了手术时间,减少了术中出血量、术后胆漏发生率以及引流管拔出时间,是治疗胆总管结石的一种安全且有效方法。展开更多
基金National Key Scientific Instrument and Equipment Development Project under Grant No.61827801the open research fund of State Key Laboratory of Integrated Services Networks,No.ISN22-11+1 种基金Natural Science Foundation of Jiangsu Province,No.BK20211182open research fund of National Mobile Communications Research Laboratory,Southeast University,No.2022D04。
文摘Spectrum map construction,which is crucial in cognitive radio(CR)system,visualizes the invisible space of the electromagnetic spectrum for spectrum-resource management and allocation.Traditional reconstruction methods are generally for twodimensional(2D)spectrum map and driven by abundant sampling data.In this paper,we propose a data-model-knowledge-driven reconstruction scheme to construct the three-dimensional(3D)spectrum map under multi-radiation source scenarios.We firstly design a maximum and minimum path loss difference(MMPLD)clustering algorithm to detect the number of radiation sources in a 3D space.Then,we develop a joint location-power estimation method based on the heuristic population evolutionary optimization algorithm.Considering the variation of electromagnetic environment,we self-learn the path loss(PL)model based on the sampling data.Finally,the 3D spectrum is reconstructed according to the self-learned PL model and the extracted knowledge of radiation sources.Simulations show that the proposed 3D spectrum map reconstruction scheme not only has splendid adaptability to the environment,but also achieves high spectrum construction accuracy even when the sampling rate is very low.
文摘目的探讨温肾护脉汤治疗脓毒症阳脱证的临床疗效及对炎症因子、免疫功能的影响。方法选取本院急诊科收治的160例脓毒症阳脱证患者,按随机数字表法分为观察组和对照组,每组80例。对照组给予西医常规治疗,观察组在对照组治疗基础上加用温肾护脉汤。治疗7 d后,比较2组患者临床疗效、中医证候积分、脓毒症相关性器官功能衰竭评价(sepsis-related organ failure assessment,SOFA)评分、急性生理学和慢性健康状况评价(acute physiology and chronic health evaluation,APACHE)II评分、血清炎症因子水平、免疫功能指标、重症监护病房(intensive care unit,ICU)住院时间及机械通气时间。结果治疗结束后,观察组总有效率为90.0%,显著高于对照组的77.5%(P<0.05)。观察组中医证候积分、SOFA评分、APACHE II评分及血清白细胞(white blood cell,WBC)、降钙素原(procalcitonin,PCT)、超敏C反应蛋白(hypersensitive C-reactive protein,hs-CRP)、肿瘤坏死因子(tumor necrosis factor,TNF)-α、白介素(interleukin,IL)-6水平均显著低于对照组(P<0.05)。观察组CD_(4)^(+)T细胞、CD_(3)^(+)T细胞比例及CD_(4)^(+)/CD_(8)^(+)细胞比值均显著高于对照组(P<0.05)。观察组ICU住院时间、机械通气时间均显著短于对照组(P<0.05)。结论温肾护脉汤能显著改善脓毒症阳脱证患者临床症状,降低炎症因子水平,增强细胞免疫功能,缩短ICU住院时间,降低病死率,疗效确切。
文摘目的比较腹腔镜胆总管探查术(laparoscopic common bile duct exploration,LCBDE)中间断缝合(interrupted suture,IS)与连续缝合(continuous suture,CS)治疗胆总管结石的安全性和有效性。方法回顾性分析2018年6月至2023年4月我科行LCBDE治疗的104例胆总管结石患者资料,依据缝合方法分为CS组(n=53)和IS组(n=51)。比较两组患者的手术时间、术中出血量、引流管拔出时间、术后胆漏发生率、下床活动时间、饮食恢复时间、术前术后胆总管直径、住院时间。结果CS组的手术时间、术中出血量、引流管拔出时间、术后胆漏发生率均少于IS组(P<0.05)。两组下床活动时间、饮食恢复时间、住院时间比较,差异均无统计学意义(P>0.05)。两组患者术后胆总管直径均明显大于术前(P<0.05)。结论胆管连续缝合技术缩短了手术时间,减少了术中出血量、术后胆漏发生率以及引流管拔出时间,是治疗胆总管结石的一种安全且有效方法。
