目的:探讨不同严重程度急性脑梗死(ACI)病人血压和血压节律特点。方法:回顾性分析2018年1月—2021年3月医院神经科收治的354例ACI病人的临床资料,根据病人神经功能缺损程度的不同,分为A组(轻度)145例,B组(中度)136例,C组(重度)73例。比...目的:探讨不同严重程度急性脑梗死(ACI)病人血压和血压节律特点。方法:回顾性分析2018年1月—2021年3月医院神经科收治的354例ACI病人的临床资料,根据病人神经功能缺损程度的不同,分为A组(轻度)145例,B组(中度)136例,C组(重度)73例。比较3组病人日间平均收缩压(dSBP)、日间平均舒张压(dDBP)、夜间平均收缩压(nSBP)、夜间平均舒张压(nDBP)、24 h平均收缩压(24 h SBP)、24 h平均舒张压(24 h DBP)及昼夜节律、晨峰血压增高的差异。结果:3组病人NIHSS评分存在统计学差异(P<0.01)。3组病人dSBP、dDBP、nSBP、nDBP、24 h SBP及24 h DBP水平的比较,均无明显差异(P>0.05)。3组病人昼夜节律比较存在明显差异,C组杓型节律的比例较A、B组显著下降,B组杓型节律的比例较A组显著下降(P<0.05)。3组病人晨峰血压增高发生率比较存在明显差异(P<0.05),其中,C组晨峰血压增高的发生率较A、B组显著升高,B组晨峰血压增高的发生率较A组显著升高(P<0.05)。结论:急性脑梗死病人血压昼夜节律、晨峰血压增高与神经功能缺损严重程度相关。展开更多
The neuron model has been widely employed in neural-morphic computing systems and chaotic circuits.This study aims to develop a novel circuit simulation of a three-neuron Hopfield neural network(HNN)with coupled hyper...The neuron model has been widely employed in neural-morphic computing systems and chaotic circuits.This study aims to develop a novel circuit simulation of a three-neuron Hopfield neural network(HNN)with coupled hyperbolic memristors through the modification of a single coupling connection weight.The bistable mode of the hyperbolic memristive HNN(mHNN),characterized by the coexistence of asymmetric chaos and periodic attractors,is effectively demonstrated through the utilization of conventional nonlinear analysis techniques.These techniques include bifurcation diagrams,two-parameter maximum Lyapunov exponent plots,local attractor basins,and phase trajectory diagrams.Moreover,an encryption technique for color images is devised by leveraging the mHNN model and asymmetric structural attractors.This method demonstrates significant benefits in correlation,information entropy,and resistance to differential attacks,providing strong evidence for its effectiveness in encryption.Additionally,an improved modular circuit design method is employed to create the analog equivalent circuit of the memristive HNN.The correctness of the circuit design is confirmed through Multisim simulations,which align with numerical simulations conducted in Matlab.展开更多
文摘目的:探讨不同严重程度急性脑梗死(ACI)病人血压和血压节律特点。方法:回顾性分析2018年1月—2021年3月医院神经科收治的354例ACI病人的临床资料,根据病人神经功能缺损程度的不同,分为A组(轻度)145例,B组(中度)136例,C组(重度)73例。比较3组病人日间平均收缩压(dSBP)、日间平均舒张压(dDBP)、夜间平均收缩压(nSBP)、夜间平均舒张压(nDBP)、24 h平均收缩压(24 h SBP)、24 h平均舒张压(24 h DBP)及昼夜节律、晨峰血压增高的差异。结果:3组病人NIHSS评分存在统计学差异(P<0.01)。3组病人dSBP、dDBP、nSBP、nDBP、24 h SBP及24 h DBP水平的比较,均无明显差异(P>0.05)。3组病人昼夜节律比较存在明显差异,C组杓型节律的比例较A、B组显著下降,B组杓型节律的比例较A组显著下降(P<0.05)。3组病人晨峰血压增高发生率比较存在明显差异(P<0.05),其中,C组晨峰血压增高的发生率较A、B组显著升高,B组晨峰血压增高的发生率较A组显著升高(P<0.05)。结论:急性脑梗死病人血压昼夜节律、晨峰血压增高与神经功能缺损严重程度相关。
基金Project supported by the National Nature Science Foundation of China(Grant Nos.51737003 and 51977060)the Natural Science Foundation of Hebei Province(Grant No.E2011202051).
文摘The neuron model has been widely employed in neural-morphic computing systems and chaotic circuits.This study aims to develop a novel circuit simulation of a three-neuron Hopfield neural network(HNN)with coupled hyperbolic memristors through the modification of a single coupling connection weight.The bistable mode of the hyperbolic memristive HNN(mHNN),characterized by the coexistence of asymmetric chaos and periodic attractors,is effectively demonstrated through the utilization of conventional nonlinear analysis techniques.These techniques include bifurcation diagrams,two-parameter maximum Lyapunov exponent plots,local attractor basins,and phase trajectory diagrams.Moreover,an encryption technique for color images is devised by leveraging the mHNN model and asymmetric structural attractors.This method demonstrates significant benefits in correlation,information entropy,and resistance to differential attacks,providing strong evidence for its effectiveness in encryption.Additionally,an improved modular circuit design method is employed to create the analog equivalent circuit of the memristive HNN.The correctness of the circuit design is confirmed through Multisim simulations,which align with numerical simulations conducted in Matlab.
