In this paper,we establish and study a single-species logistic model with impulsive age-selective harvesting.First,we prove the ultimate boundedness of the solutions of the system.Then,we obtain conditions for the asy...In this paper,we establish and study a single-species logistic model with impulsive age-selective harvesting.First,we prove the ultimate boundedness of the solutions of the system.Then,we obtain conditions for the asymptotic stability of the trivial solution and the positive periodic solution.Finally,numerical simulations are presented to validate our results.Our results show that age-selective harvesting is more conducive to sustainable population survival than non-age-selective harvesting.展开更多
目的明确急性脑梗塞患者颈动脉狭窄的独立危险因素。方法选取2022年6月—2025年6月本院100例急性脑梗塞患者进行颈动脉超声检测与多维度实验室检测,收集人口学特征、既往病史及美国国立卫生研究院卒中量表(national institutes of healt...目的明确急性脑梗塞患者颈动脉狭窄的独立危险因素。方法选取2022年6月—2025年6月本院100例急性脑梗塞患者进行颈动脉超声检测与多维度实验室检测,收集人口学特征、既往病史及美国国立卫生研究院卒中量表(national institutes of health stroke scale,NIHSS)评分,进行单因素及多因素逻辑(Logistic)回归分析。结果狭窄组与非狭窄组间颈动脉斑块发生率差异具统计学显著性(P<0.001),单因素Logistic分析筛选出12个与狭窄相关的变量(P<0.05);多因素Logistic分析显示,男性、年龄、吸烟史、脑卒中或短暂性脑缺血发作(transient ischemic attack,TIA)史、收缩压(systolic blood pressure,SBP)、低密度脂蛋白胆固醇(low-density lipoprotein cholesterol,LDL-C)是颈动脉狭窄的独立危险因素(P<0.05)。结论颈动脉超声与实验室检测协同应用可提升急性脑梗塞患者颈动脉狭窄风险识别精准性,临床可针对上述独立危险因素开展针对性检测与干预,以降低狭窄发生风险,改善预后。展开更多
基金Supported by the National Natural Science Foundation of China(12261018)Universities Key Laboratory of Mathematical Modeling and Data Mining in Guizhou Province(2023013)。
文摘In this paper,we establish and study a single-species logistic model with impulsive age-selective harvesting.First,we prove the ultimate boundedness of the solutions of the system.Then,we obtain conditions for the asymptotic stability of the trivial solution and the positive periodic solution.Finally,numerical simulations are presented to validate our results.Our results show that age-selective harvesting is more conducive to sustainable population survival than non-age-selective harvesting.
