In this paper, a new scheme that combines Space-Time Block-Coding (STBC) based on an Alamouti-like scheme and the Least Squares (LS) channel estimation using optimal training sequences in Cyclic-Prefix-based (CP)\Sing...In this paper, a new scheme that combines Space-Time Block-Coding (STBC) based on an Alamouti-like scheme and the Least Squares (LS) channel estimation using optimal training sequences in Cyclic-Prefix-based (CP)\Single-Carrier (SC) systems is proposed. With two transmit antennas, based on Cramer-Rao lower bound for channel estimation, it is shown that the Periodic Comple- mentary Set (PCS) is optimal over frequency-selective fading channels. Compared with the normal scheme without STBC, 3dB Mean Square Error (MSE) performance gains and fewer restrictions on the length of channel impulse response are demonstrated.展开更多
The factorial design within a conditional model is utilized when the effects of one factor in a factorial experiment hold greater significance under each fixed level of another factor.This paper investigates the gener...The factorial design within a conditional model is utilized when the effects of one factor in a factorial experiment hold greater significance under each fixed level of another factor.This paper investigates the generalized minimum aberration(N,sp)-design,where each factor is s-level,with s being any prime or prime power.Via utilizing the method of complementary designs,the authors explore the design with a pair of conditional and conditioning factors.The proposed approach applies not only to regular designs but also to nonregular designs.Additionally,the findings can be extrapolated to encompass designs under the two pairs conditional model.The findings presented in this paper not only strengthen but also generalize the existing knowledge in this field.展开更多
In this paper,we consider the regular s-level fractional factorial split-plot(FFSP)designs when the subplot(SP)factors are more important.The idea of general minimum lower-order confounding criterion is applied to suc...In this paper,we consider the regular s-level fractional factorial split-plot(FFSP)designs when the subplot(SP)factors are more important.The idea of general minimum lower-order confounding criterion is applied to such designs,and the general minimum lower-order confounding criterion of type SP(SP-GMC)is proposed.Using a finite projective geometric formulation,we derive explicit formulae connecting the key terms for the criterion with the complementary set.These results are applied to choose optimal FFSP designs under the SP-GMC criterion.Some two-and three-level SP-GMC FFSP designs are constructed.展开更多
The integration of multiple electrophysiological biomarkers is crucial for monitoring neonatal seizure dynamics.The present study aimed to characterize the temporal dynamics of neonatal seizures by analyzing intrinsic...The integration of multiple electrophysiological biomarkers is crucial for monitoring neonatal seizure dynamics.The present study aimed to characterize the temporal dynamics of neonatal seizures by analyzing intrinsic waveforms of epileptic electroencephalogram(EEG)signals.We proposed a complementary set of methods considering envelope power,focal sharpness changes,and nonlinear patterns of EEG signals of 79 neonates with seizures.Features derived from EEG signals were used as input to the machine learning classifier.All three characteristics were significantly elevated during seizure events,as agreed upon by all viewers(P<0.0001).Envelope power was elevated in the entire seizure period,and the degree of nonlinearity rose at the termination of a seizure event.Epileptic sharpness effectively characterizes an entire seizure event,complementing the role of envelope power in identifying its onset.However,the degree of nonlinearity showed superior discriminability for the termination of a seizure event.The proposed computational methods for intrinsic sharp or nonlinear EEG patterns evolving during neonatal seizure could share some features with envelope power.Current findings may be helpful in developing strategies to improve neonatal seizure monitoring.展开更多
基金Supported by the National Natural Science Foundation of China (No.60472089, No.90604035).
文摘In this paper, a new scheme that combines Space-Time Block-Coding (STBC) based on an Alamouti-like scheme and the Least Squares (LS) channel estimation using optimal training sequences in Cyclic-Prefix-based (CP)\Single-Carrier (SC) systems is proposed. With two transmit antennas, based on Cramer-Rao lower bound for channel estimation, it is shown that the Periodic Comple- mentary Set (PCS) is optimal over frequency-selective fading channels. Compared with the normal scheme without STBC, 3dB Mean Square Error (MSE) performance gains and fewer restrictions on the length of channel impulse response are demonstrated.
基金supported by the National Natural Science Foundation of China under Grant Nos.12301318 and 12101357Beijing Institute of Technology Research Fund Program for Young Scholars and Natural Science Foundation of Shandong under Grant No.ZR2021QA080。
文摘The factorial design within a conditional model is utilized when the effects of one factor in a factorial experiment hold greater significance under each fixed level of another factor.This paper investigates the generalized minimum aberration(N,sp)-design,where each factor is s-level,with s being any prime or prime power.Via utilizing the method of complementary designs,the authors explore the design with a pair of conditional and conditioning factors.The proposed approach applies not only to regular designs but also to nonregular designs.Additionally,the findings can be extrapolated to encompass designs under the two pairs conditional model.The findings presented in this paper not only strengthen but also generalize the existing knowledge in this field.
基金supported by the National Natural Science Foundation of China(No.12171277,12271294).
文摘In this paper,we consider the regular s-level fractional factorial split-plot(FFSP)designs when the subplot(SP)factors are more important.The idea of general minimum lower-order confounding criterion is applied to such designs,and the general minimum lower-order confounding criterion of type SP(SP-GMC)is proposed.Using a finite projective geometric formulation,we derive explicit formulae connecting the key terms for the criterion with the complementary set.These results are applied to choose optimal FFSP designs under the SP-GMC criterion.Some two-and three-level SP-GMC FFSP designs are constructed.
基金partially supported by the National Natural Science Foundation of China(Nos.62171028 and 62001026)the Beijing Natural Science Foundation(No.L232139)+2 种基金the Open Project of Key Laboratory of Medical Electronics and Digital Health of Zhejiang Province(Nos.MEDH202204 and MEDC202303)the High-Level Fellow Research Fund Program(No.3050012222022)the BIT Research and Innovation Promoting Project(No.2023YCXZ009).
文摘The integration of multiple electrophysiological biomarkers is crucial for monitoring neonatal seizure dynamics.The present study aimed to characterize the temporal dynamics of neonatal seizures by analyzing intrinsic waveforms of epileptic electroencephalogram(EEG)signals.We proposed a complementary set of methods considering envelope power,focal sharpness changes,and nonlinear patterns of EEG signals of 79 neonates with seizures.Features derived from EEG signals were used as input to the machine learning classifier.All three characteristics were significantly elevated during seizure events,as agreed upon by all viewers(P<0.0001).Envelope power was elevated in the entire seizure period,and the degree of nonlinearity rose at the termination of a seizure event.Epileptic sharpness effectively characterizes an entire seizure event,complementing the role of envelope power in identifying its onset.However,the degree of nonlinearity showed superior discriminability for the termination of a seizure event.The proposed computational methods for intrinsic sharp or nonlinear EEG patterns evolving during neonatal seizure could share some features with envelope power.Current findings may be helpful in developing strategies to improve neonatal seizure monitoring.
