Study on the electromagnetic fields of an extended source over layered models
Ion beam etching for multilayer dielectric pulse compressor gratings with top layers of HfO2
Systematic studies on the field enhancement effect of Hertzian microcracks
Study on the temperature modified method for monitoring gas concentrations with tunable diode laser absorption spectroscopy
Study on surface waves formed at the interface between linear dielectric and centrosymmetric photorefractive crystals
Temperature characteristics of VCSEL with liquid crystal overlay
Generalized linear reconstructing algorithm based on homomorphic signal processed in digital holographic microscopy
PN-based single carrier block transmission with iterative frequency domain equalization over underwater acoustic channels
Macroscopic physical meaning of entransy and its application
Influence of diamond on heat dissipation capability of slow-wave structure of helix TWT
Bifurcation and chaos in some relative rotation systems with Mathieu-Duffing oscillator
Noether symmetries of dynamics for non-conservative systems with time delay
Dynamic process simulation of droplet spreading on solid surface by lattic Boltzmann method
Stability characteristics of thin film dewetting with insoluble surfactant
Size effect of silk fibroin peptide chains in the growth process
A theoretical study on 13 oligopeptides of glycine and alanine by density function theory (DFT) is given in this paper. Geometric structures, vibration frequency, average binding energies, dipole moment are studied, and IR spectra of the oligopeptides are examined. Results show that with increasing number of residues the average binding energies tend to a regular pattern, IR frequencies of typical functional groups start to shift, but stretching and bending vibrations of the groups show the opposite trend of red shift and blue shift. It is revealed that the physical and chemical properties of the silk fibroin peptide chain show size effect and anisotropic in the growth process. This phenomenon may come from the coupling effect of the similar groups, and the different effects of intramolecular hydrogen bond on the stretching and bending vibration.
Electronic properties of graphene nanoribbons with periodical nanoholes passivated by oxygen
Damage and structural defects in the surface lager of pure molybdenum induced by high-current pulsed electron beam
Effect of concentration of heavy oxygen vacancy in rutile and anatase (TiO2) on electric conductivity performance studied by simulation and calculation
The pure and heavy oxygen vacancy for both rutile and anatase supercell models of TiO1.9375 were structured by using first-principles plane-wave ultrasoft pseudopotential method based on the density functional theory, the geometry optimizations, band structures, and density of states of these models were calculated. Results show that the volumes become greater for both heavy oxygen vacancy rutile and anatase, meanwhile, all of the stability, mobility, and conductivity of anatase supercell model of TiO1.9375 ore greater than the rutile supercell model, which are in agreement with the experimental results.
Simulation and calculation of the Mott phase transition and magnetroelectric performance of Magnéli phase titanium suboxides
The pure and Magnéli phase titanium suboxides for both rutile and anatase supercell models of TiO1.9375 were structured by using first-principles plane-wave ultrasoft pseudopotential method based on the density functional theory; the geometry optimizations, the band structures, and density of states of these models were calculated. Results show that the volumes become greater for Magnéli phase titanium suboxides in both rutile and anatase; meanwhile, the stability may reduce slightly, leading to a Mott transition. The nonmagnetic property of anatase titanium suboxides, and the magnetic property of rutile titanium suboxides, as wall as the conductive property of anatase titanium suboxides are higher than rutile titanium suboxides, in agreement with the experimental results.
Analytical modeling for drain current of strained Si NMOSFET
External electric field effect on exciton binding energy in InGaAsP/InP quantum wells
Mechanism and optimal design of a high-k dielectric conduction enhancement SOI LDMOS
Design and study on the dual-band radome with FSS operation at Ku-/Ka-band
Plasmon effects on linear spectra related to heterogeneous electron transfer
High-temperature piezoelectirc thin films of 0.20BiInO3-0.80PbTiO3 deposited by pulsed laser deposition（Retracted Article)
High-temperature piezoelectric thin films of 0.20BiInO3-0.80PbTiO3 (20BI-PT) were prepared via pulsed laser deposition and investigated by comparison with 0.15BiInO3-0.85PbTiO3(15BI-PT). XRD patterns show that (100) peak of 20BI-PT has been split, indicating a higher tetragnality than in 15BI-PT. FESEM images reveal some triangular grains corresponding to -oriented grains in 20BI-PT. The remanent polarization (Pr) and coercive field (Ec) of 20BI-PT are ～ 28 μC/cm2 and ～120 kV/cm, respectively. It is shown that the transverse piezoelectric coefficient e31, f keeps almost the same in 20BI-PT and 15BI-PT. The temperature dependence of dielectric permittivity in 20BI-PT reveals a higher Curie temperature (590 ℃) than that in 15BI-PT and no apparent frequency dependence is detected. Rayleigh analyses are performed to identify the extrinsic contributions to dielectric nonlinearity for different x. It is seen that x=0.15 exhibits greater extrinsic contributions to dielectric nonlinearity than the other compositions.
Raman spectra studies on (Ba,Sr)TiO3 ceramics under dc electric fields
A polarization-independent and ultra-broadband terahertz metamaterial absorber studied based on circular-truncated cone structure
Polarized Raman spectra of single crystal Bi2ZnOB2O6
Polarized Raman spectra of single crystal Bi2ZnOB2O6 have been recorded in the spectral range 10–1600 cm-1 at room temperature. Factor group analysis was used to obtain the normal modes of vibration of the crystal. The Raman peaks under 300 cm-1 are assigned to external modes, which are related to the rotational and transitional movement of the [BiO6], [ZnO4], [BO4] and [BO3] groups. Compared with the vibrational spectra of the compounds referred, the satisfactory assignment of most of the high-energy modes to vibrations of Bi-O, B-O and Zn-O bonds can be achieved. In particular, the Raman high-frequency peak located at 1407 cm-1 is attributed to the B-O vibration in the [BO3] triangle.
Mn2+ induced luminescence regulation and enhancement of Lu-based nanocrystals
Transformation from Lu-based nanocrystals in hexagonal and cubic mixed phases to pure cubic phase was observed through adjusting the doping concentration of Mn2+. The mechanism for the phase transformation was discussed in detail. Studies on the time and frequency domain spectra indicated that the semi-pure red emissions in cubic Na5Lu9F32: 40% Mn2+, 20% Yb3+, 2% Ln3+ (Ln=Er3+, Ho3+) nanocrystals were caused by a two-step energy transfer between Mn2+ and Ln3+ ions. After incorporating of Mn2+ ions into the host lattices, the local symmetry around the luminescent ion was reduced, which induced the increase of radiative rates for transitions that were mainly contributed by electric dipole radiations. Considerable enhancements in upconversion and downconversion luminescence were accompanied. The result of the current study has great application potential in bioimaging and solar cells.
Electrically-controlled nonlinear terahertz optical properties of graphene
Simulation and experimental research of phase transmission features based on evanescent field coupled graphene waveguide
Tuning surface plasmons in nanorod arrays with ultrasmall spacing
Molecular dynamics study on the structure and properties of silicon-graphdiyne
Strain effect on the morphological instability of a circular island in heteroepitaxy
Stady on a high efficient Denisov-type launcher for high-power gyrotron oscillators
Correlation-based analytical modeling of MIMO systems with hybrid-diversity antenna
Study of a W-band TE62 mode generator by the waveguide mode transformation
Comparison between memory characteristics of MONOS memory with LaON/SiO2 or HfON/SiO2 as dual-tunnel layer
Coupling analysis of electrocardiogram and electroencephalogram based on improved symbolic transfer entropy
Studies on sulpho-selenization of electrodeposited Cu-In-Ga metallic precursor
In this paper, the electrodeposited Cu-In-Ga metallic precursors have been sulpho-selenized by using H2S gas as the sulfur source and Se vapor as selenium source. Through the comparative experiments of selenization, sulfization and sulpho-selenization of the Cu-In-Ga metallic precursor, it has been found that the formations of CuInS2 phase and CuIn(S,Se)2 phase have priority over and restrain the formation of CuInSe2, so that the InSe phase diffuses into the film and weakens the phenomenon of separation into two phases in the film. Then the process of first selenization and sulfization next was made to optimize the preparation of Cu(In,Ga)(S,Se)2 film. At 250 ℃, the pre-selenization temperature, the solar cells with 570 mV open circuit voltage are prepared, while at a higher pre-selenization temperature, the solar cells with a large short-circuit current are prepared. Finally the optimized solar cell with 10.4% efficiency is obtained.
Effects of sensitive changing-lane rule on the off-ramp traffic system
Based on the NaSh model, the rules of straight movement and lane change are defined while considering the change of driving behavior under the guidance of traffic signs at ramp; besides, a traffic model with sensitive lane change under the cellular automation is proposed. Furthermore, computer numerical simulation result indicates that the procedure of sensitive lane change can effectively reduce the lane change ratio of the straight moving vehicles, thus obviously it has an inhibitory effect on unnecessary lane change; what is more, the longer the sensitive lane change zone, the more effective the inhibitory function is. However, the traffic signs at ramp cannot be set as far as possible. Lower the lane change ratio is, shorter the sensitive lane change zone needed is. The traffic signs at ramp are set with proper distance according to the lane change ratio can effectively increase systematic traffic flow as well as the critical entrance probability.
The research of the social network evolution based on the evolutionary game theory
Lie symmetry analysis of the time fractional Boussinesq equation
The traveling wave approximate solution for a class of atmospheric wading wave system by generalized variational iteration
Study of energy stability and perturbation in the Q-ball solutions of Klein-Gordon equation
High-efficient quantum state sharing via non-maximally five-qubit cluster state
Poisson survival model of quantum entanglement signaling network and fidelity analysis
Study on the gravitational waveform emitted from post-Newtonian eccentric spinning compact binary
This paper mainly deals with the effects of eccentricity on the gravitational waveforms emitted by the non-conservative post-Newtonian (PN) Hamiltonian formulations of the spinning compact binaries. The numerical results show that the change of eccentricity has a slight influence on the time-domain gravitational waveforms from the conservative spinning compact binaries, but the frequency bands of gravitational waveforms is broadened with increasing eccentricity. Owing to the effects of dissipation from the gravitational radiation reaction, the separation and the eccentricity decrease gradually with time, and the gravitational waveforms emitted from the non-conservative PN spinning compact binaries are modulated by the eccentricity, meanwhile the amplitude of the waveforms enhances with the increase of eccentricity; the duration of the waveforms decreases.
An elastic-diffusion model for myosin Ⅵ molecular motor in a periodic potential field
Design and simulation of chaotic circuit for flux-controlled memristor and charge-controlled memristor
A phase space denoising method for chaotic maps
Chaotic laser parallel synchronization and its application in all-optical logic gates
Optimal control for a chaotic system by means of Gauss pseudospectral method
A new double-wing fractional-order chaotic system and its synchronization by sliding mode
Spatio-temporal synchronization of parameter mismatch system based on differential geometry theory
Optimization in design of actively shielded whole-body open high-field superconducting MRI magnet
Method of imaging performance deterioration anlysis and its experiment simulated high heating sapphire MW infrared window during near-hypersonic flight
Conformal invariance and conserved quantity for a variable mass holonomic system in relative motion
First principle study on B-Al co-doped 3C-SiC
TDDFT studies on CO in a linear polarized femtosecond laser field
Studies on the R-branch emission spectral lines of VN molecules
Multi-reference calculations on the potential energy curves and spectroscopic properties of the low-lying excited states of BS+
The high-level quantum chemistry ab initio multi-reference configuration interaction method (MRCI) with reasonable aug-cc-p VQZ basis sets is used to calculate the potential energy curves of 5 Λ-S states of BS+ radical related to the dissociation limit B+(1Sg)+S(3Pg) and B+(1Sg)+S(1D), where the ground state of X3∏ is determined. The spin-orbit interaction is firstly considered, which makes the calculated 5 Λ-S states split in to 9 Ω states. Calculated results show that avoided crossing rule exists between the Ω states of the same symmetry. Analysis of electronic structures of Λ-S states shows that the Λ-S electronic states are multi-configuration in nature. Then the spectroscopic constants of the bound Λ-S and Ω states are obtained by solving the radial Schrödinger equation. All of these data will provide accurate information of the electron structure for further research on BS+ in theory and experiment.
Theoretical study on angular distribution and polarization characteristics of X-ray emission following dielectronic recombination of lithium-like ions
Based on the multiconfiguration Dirac-Fock method and the theory of density matrix, we have calculated the magnetic sublevel captured cross section of intermediate doubly-excited state 1s2s22p3/2J = 1 formed by dielectronic recombination of lithium-like ions (26 ≤ Z ≤ 92). Then, we obtain the angular distribution and linear polarization of X-rays of electric-dipole radiation 1s2s22p3/2J = 1→1s22s2J = 0. In this study, emphasis is placed on the effects of the Breit interaction on the relevant physical quantities. We find that the influences of the Breit interaction on the alignment for the capture to the doubly-excited state 1s2s22p3/2J = 1 are dramatic, resulting in the remarkable change in the angular distribution and polarization properties of the X-ray emission.
Electric field induced polarization dynamics of graphene oxide
Theoretical and experimental study of a novel double-well optical dipole trap for two-species of cold atoms or molecules
A novel scheme based on light diffraction to generate a double-well optical trap for trapping and controlling two-species samples of cold atoms or molecules is proposed. Specialized phase modulation similar to the binary phase-grating is implemented in a diffraction device of liquid crystal spatial light modulator (LC-SLM). A continuous and reversible evolution between single-well trap and double-well trap is investigated. Corresponding experiments are performed and the results are in agreement with theories. Our results show that the proposed scheme has a controllability advantage, which is beneficial to the loading and controlling two-species samples in cold atoms or molecules experiments.