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Two-Dimensional Augmented State-Space Approach with Applications to Sparse Representation of Radar Signatures.
Sensors (Basel)
October 2019
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China.
In this work, we focus on sparse representation of two-dimensional (2-D) radar signatures for man-made targets. Based on the damped exponential (DE) model, a 2-D augmented state-space approach (ASSA) is proposed to estimate the parameters of scattering centers on complex man-made targets, i.e.
View Article and Find Full Text PDFExcited state dynamics of symmetric and asymmetric Cr(dpa)Cl measured using femtosecond transient absorption spectroscopy.
Phys Chem Chem Phys
September 2017
Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 30013, Republic of China.
Herein, the excited-state dynamics of an extended metal atom chain complex, Cr(dpa)Cl (dpa = dipyridylamide), in tetrahydrofuran solution were investigated using femtosecond transient absorption spectroscopy. Upon excitation at a wavelength of 330 nm, two distinct excited-state absorption species with varied dynamics were identified and assigned to the symmetric (s-) and unsymmetric (u-) Cr(dpa)Cl. The major species is s-Cr(dpa)Cl that undergoes rapid conversion at less than 100 fs from the ligand-centred π-π* state, which is the initially accessed state, to the metal-centred d-d state and then vibrational cooling accompanying the structural relaxation at a time constant ∼2.
View Article and Find Full Text PDFDifferential scanning calorimetric study of the thermal unfolding of beta-lactamase I from Bacillus cereus.
Biochemistry
July 1992
Instituto de Quimica Fisica Rocasolano, CSIC, Madrid, Spain.
The irreversible thermal unfolding of the class A beta-lactamase I from Bacillus cereus has been investigated at pH 7.0, using differential scanning calorimetry (DSC) and inactivation kinetic techniques. DSC transitions showed a single peak with a denaturation enthalpy of 646 kJ.
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