bluuebunny/crossref_metadata_2025 huggingface dataset:
Prediction of chaotic time sequence using least squares support vector domain
Authors: Ren Ren  , Xu Jin  , Zhu Shi-Hua  ,   西安交通大学电子与信息工程学院，710049
Published: December 2020

Starting from the support vector domain model, the paper establishes SVD predictive models of chaos time series as well as chaos phase trace of non-linear map, based on Takens phase space delay reconstructing theory. We adopted the methodof data set as support object elements. Machine self-learning reduces error upper limit of the generalized model. The three chaos time series, Henon/Lorenz/Rossler are predicted by least square. The prediction result indicates that the predictive model makes the set to be mapped into an eigen space of higher dimensions, and the series is predicted by embed dimensions. The predictive error changes with the increase of embed dimension to a constant. Compared with SVM, the SVD requires smaller support vector, and has faster convergence rate. It has robustness characteristics with adaptive flexible kernel function choice. The predicted net points are ten to twenty times more than SVM. Under the conditions of small sample, non-linear, and unknown probability density, the predicted series is in concordance with the series′ true value.
Calculation of the maximal Lyapunov exponent from multivariate data
Authors: Lu Shan  , Wang Hai-Yan  ,   东南大学经济管理学院,南京  210096
Published: December 2020

According to the method of calculating maximal Lyapunov exponent (MLE) from univariate small data sets, an extended method based on multivariate time series is proposed. The extended method can search out optimal reconstructing parameters to meet the requirement of the original method for reconstructing multivariate phase space, and the method can compute the MLE by making use of the optimal reconstructed multivariate phase space. The method is tested by coupled non-identical chaotic Rssler, coupled chaotic Rssler and hyper chaotic Rssler. The test results show that the extend method is efficient, and the computing results of MLE based on multivariate are much closer to the theoretical values than the results of univariate even when the data sets of each time series become small.
Parameter estimation for chaotic system based on particle swarm optimization
Authors: Gao Fei  , Tong Heng-Qing  ,   武汉理工大学数学系，武汉  430070
Published: December 2020

It's of vital importance to estimate the unknown parameters of chaos systems in chaos control and synchronization. We firstly improve the newly developed particle swarm optimization (PSO) in view of the population initialization and objective function treatment. Then we use the improved algorithms for parameter estimation and on-line estimation of chaotic system for its global searching ability. Experiments show that the improved method has better adaptability, reliability and high precision is robust to noise. It is proved to be a successful approach in parameter estimation for chaotic systems.
Linear state feedback control for a new chaotic system
Authors: Li Rui-Hong  , Xu Wei  , Li Shuang  ,   西北工业大学理学院应用数学系,西安  710072
Published: December 2020

The problem of controlling a class of new chaotic system is investigated. Applying Routh-Hurwitz criterion, we analyze the stability of the controlled system. The choice principle of feedback coefficients to attain control objective is proved strictly by combining the linear state feedback method. Numerical simulation results show that the method can effectively guide the chaotic trajectories to an unstable equilibrium point or periodic solution. In addition, we find the control is stable in the presence of weak external noise.
Parameter identification and adaptive synchronization of uncertain Chen system
Authors: Wang Xing-Yuan  , Wu Xiang-Jun  ,   大连理工大学电子与信息工程学院，大连  116024
Published: December 2020

This paper addresses the adaptive synchronization and parameter identification problem of two Chen systems with unknown system parameters. Based on the Lyapunov stability theory, an adaptive controller and the parameter update rule are designed. It is proved that the controller and update rule can make the states of the drive system and the response system with unknown parameters asymptotically synchronized, and identify the system parameters. Numerical simulations show the effectiveness of the adaptive controller.
A nonlinear wave equation and exact periodic solutions in circular-rod waveguide
Authors: Liu Zhi-Fang  , Zhang Shan-Yuan  ,   太原理工大学应用力学研究所，太原  030024
Published: December 2020

Under the condition of small deformation, a new nonlinear wave equation is derived to describe nonlinear wave evolution in a nonlinear elastic circular rod by means of Hamilton principle. The nonlinear constitutive relationship proposed by Cox and transverse Possion effects are simultaneously taken into account. Nonlinear wave equation and truncated nonlinear wave equation are solved by the Jacobi elliptic cosine function expansion method. The exact periodic solutions of these nonlinear equations are obtained. The limiting conditions of these solutions are also given.
Effects of high magnetic fields on the distribution of Si in solidified structures of Al-Si alloy
Authors: Wang Chun-Jiang  , Wang Qiang  , Wang Ya-Qin  , Huang Jian  , He Ji-Cheng  ,   (1)东北大学材料电磁过程研究教育部重点实验室，沈阳  110004; (2)沈阳铸造研究所，沈阳  110021
Published: December 2020

In order to find the effects of high magnetic fields on the solidification processes of metallic materials, the changes of solidified structures of Al-14.98% Si and Al-9.2% Si alloys were examined in this study. The alloys were solidified under different magnetic field conditions, and then the distribution and morphologies of Si element in the solidified structures was analyzed. It is found that uniform magnetic fields and gradient magnetic fields can affect the solidified structures of the alloy by Lorenz force and magnetization force respectively, and the imposed magnetic fields also can change the distribution of primary Si crystals in the alloy remarkably. The primary Si crystals distributed homogeneously under uniform magnetic field conditions, while they congregated at the upside or downside of samples by the combined action of buoyancy and magnetization force under gradient magnetic field conditions. Furthermore, the morphologies of eutectic crystals in the alloy were changed by the magnetic fields and the layer thickness of eutectic crystals were different at the upside and downside under gradient magnetic field. Both theoretical analysis and examinations indicated that magnetic energy also affected the solidifying process, the content of eutectic aluminum in eutectic structure increased and eutectic point left-shifted when Al-Si alloy solidified under high magnetic fields.
Effects of relaxation induced by excitation (or ionization) of inner subshell electrons on the wave functions and transition probabilities
Authors: Li Jie  , Dong Chen-Zhong  , Xie Lu-You  ,   (1)西北师范大学物理与电子工程学院，兰州  730070; (2)西北师范大学物理与电子工程学院，兰州  730070;兰州重离子加速器国家实验室原子核理论研究中心，兰州  730000
Published: December 2020

The relaxation effects induced by excitation (or ionization) of inner subshell electrons and their influences on the electronic wave functions of the ground configuration 3p6 and five excited configurations 1s-14s, 2s-14s, 2p-14s, 3s-14s, and 3p-14s in Argon have been systematically studied by using the Multi_configuration Dirac_Fock method (MCDF). Furthermore, the transition energies and probabilities of argon from kα and　kβ　lines have been presented and discussed in cases with and without relaxation, and also a comparison has been made with some existing theoretical calculations.
Electron emission induced by the interaction of highly charged ions 207Pbq+(24≤q≤36) with solid surface of Si(110)
Authors: Wang Yu-Yu  , Zhao Yong-Tao  , Xiao Guo-Qing  , Fang Yan  , Zhang Xiao-An  , Wang Tie-Shan  , Wang Shi-Wei  , Peng Hai-Bo  ,   (1)兰州大学物理学院，兰州  730000; (2)中国科学院近代物理研究所，兰州  730000; (3)中国科学院近代物理研究所，兰州  730000;中国科学院研究生院，北京  100039
Published: December 2020

The electron emission induced by highly charged ions 207Pbq+(24≤q≤36) interacting with Si(110) surface is reported. The result shows that the electron emission yield Y has a strong dependence on the projectile charge state q, incidence angle ψ and impact energy E. In fitting the experimental data we found a nearly 1/tanψ dependence of Y. Theoretical analysis shows that these processes are closely related to the process of potential electron emission based on the classical over_the_barrier model.
Optical properties of a two-dimensional array of absorptive and dispersive medium under near-resonant excitation
Authors: Li Zhi-Yu  , Zhou Jian-Ying  ,   中山大学光电材料与技术国家重点实验室，广州  510275
Published: December 2020

A two_dimensional array of resonant absorptive and dispersive medium is proposed. The transmission,reflection and absorption spectra of optical field transmitting in the structure are calculated. The photonic band gap caused by resonance(PBG), similar as the case of one_dimensional active photonic crystal, is observed. It’s found that the resonance between the border of the Brillouin zone and the resonant center of the atom in the array is the key condition for the formation of the PBG. Further discussion is carried on the study of the dependence of transmission spectrum on the structure,the resonant center and the absorption linewidth of the atoms in the array.
Absorption and scattering of light by ice-water mixed clouds
Authors: Sun Xian-Ming  , Han Yi-Ping  ,   (1); (2)西安电子科技大学 理学院 应用物理系,西安  710071
Published: December 2020

Based on the Mie theory，the light scattering properties in the visible regions of clouds consisting of pure water, pure ice spheres and concentric water_ice spheres are computed respectively. The reflection function and plane albedo, transmissivity, absorptivity of the three types of clouds are evaluated with the adding_doubling method by solving the radiative transfer equation. The numerical results show that the reflection function and plane albedo of ice clouds and ice_water clouds are slightly less than those of water clouds at most scattering angles, when the transmissivity is larger. A detailed theoretical analysis of the numerical results is presented, which explains the phenomenon of cloud absorption anomaly.
Information entropy squeezing of the atom of an arbitrary initial state via the two-photon process
Authors: Liu Xiao-Juan  , Zhou Bing-Ju  , Fang Mao-Fa  , Zhou Qing-Ping  ,   (1)湖南科技大学物理学院，湘潭  411201; (2)湖南科技大学物理学院，湘潭  411201；湖南师范大学物理与信息学院，长沙  410081；中国科学院安徽光学精密机械研究所，合肥  230031; (3)湖南师范大学物理与信息学院，长沙  410081；中国科学院安徽光学精密机械研究所，合肥  230031
Published: December 2020

From the quantum information point of view we investigate the entropy squeezing properties of a two_level atom with arbitrary initial state interacting with the coherent field via the two_photon process. The influence of the initial state of the system on the atomic information entropy squeezing is discussed. The numerical results obtained from the uncertainly relation of quantum information entropy are compared with those obtained from the uncertainly relation of Heisenberg. It is shown that the number of squeezed component of the atomic dipole, squeezed frequency, squeezed amplitude and squeezed direction of the atomic information entropy squeezing can be controlled by choosing the initial atomic distribution angle, the atomic mixing degree and the relative phase of the field mode, respectively. Quantum information entropy is a remarkable precise measure for the atomic squeezing.
Coherent-mode representation of the elegant Hermite-Gaussian beams
Authors: Dan You-Quan  , Zhang Bin  ,   (1)四川大学电子信息学院，成都  610064; (2)四川大学电子信息学院，成都  610064；中国民航飞行学院物理教研室，广汉  618307
Published: December 2020

Based on the theory of coherent_mode decomposition of laser beams, the mode correlation and coherent_mode representation of the elegant Hermite_Gaussian (EHG) beams are discussed. The analytical expressions for the mode coherence coefficients (MCCs) of EHG beams, which include a coherent_mode representation that consists of finite coherent_modes, are derived. Furthermore, the difference of the M2_factor between the EHG beams and SHG beams is analyzed by means of the mode structure of the EHG beams.
Study on complete band-gap of a kind of compound lattices
Authors: Pan Jie-Yong  , Liang Guan-Quan  , Mao Wei-Dong  , Wang He-Zhou  ,   中山大学光电材料与技术国家重点实验室，广州  510275
Published: December 2020

A broad complete photonic band_gap (larger than 18%) in compound square lattices, and both single and double absolute band gaps in compound triangular lattices are obtained by optimization of the structure parameter. The relationship curves between absolute band gaps and the structure parameter are demonstrated. The simulation results also show that the shifts of two sub_lattices affect the band_gap a little.
Spectral properties of fcc-like cylindrical colloidal crystals
Authors: Wei Zhong-Chao  , Dai Qiao-Feng  , Wang He-Zhou  ,   中山大学光电材料和技术国家重点实验室，广州  510275
Published: December 2020

Colloidal crystals are grown in capillaries. Experimental results demonstrate that these colloidal crystals are formed in a structure with cylindrical symmetry. The colloidal crystals are relatively stable. In all radial directions in the plan perpendicular to the axis of the capillary, the transmission spectra are the same and the wavelength of the band gaps are the longest. In other directions, the wavelength of the band gap is gradually blue shifted as the angle between light and axis of capillary decreases. This axial symmetry of band gap will have many potential applications.
Influence of carrier-envelope phase on synthesizing of fundamental and its second-harmonic pulses
Authors: Deng Yu-Qiang  , Wang Qing-Yue  , Wu Zu-Bin  , Zhang Zhi-Gang  ,   (1)天津大学精密仪器与光电子工程学院超快激光研究室，光电信息技术科学教育部重点实验室，天津  300072; (2)天津大学精密仪器与光电子工程学院超快激光研究室，光电信息技术科学教育部重点实验室，天津  300072；北京大学信息科学与技术学院量子电子学研究所，北京  100871
Published: December 2020

Ultrabroadband spectrum is necessary for generation of ultrafast laser pulses; however, the extent of broadening the spectrum by its own nonlinear effect, such as self_phase modulation or cross phase modulation etc., is always limited. An easy way to broaden the spectrum to an octave is synthesizing the spectrum of its second-harmonic and the spectrum of itself. In this paper, influence of carrier_envelope phase on the synthesizing of two laser pulses is studied.
Third-order nonlinear optical properties of hybrid films of biopolymer-CdSe/ZnS core-shell quantum dots
Authors: Ding Sha  , Wang Xiao-Hui  , Du Yu-Min  , Wang Qu-Quan  ,   (1)武汉大学物理系，武汉  430072; (2)武汉大学物理系，武汉  430072;武汉大学纳米科学与技术研究中心，武汉  430072; (3)武汉大学资源与环境科学学院，武汉  430072
Published: December 2020

Biopolymer_CdSe/ZnS core_shell quantum dot hybrid films were prepared using self_assembly technique. Compared with the absorbance spectrum, the photoluminescence excited by laser with λ=395nm has Stokes shift. The third_order nonlinear optical properties of biopolymer_CdSe/ZnS film were studied by Z_scan setup with femtosecond laser at 790nm. It is found that the nonlinear absorptive signal partially originates from Cde/ZnS quantum dots while the nonlinear refractive signal partially originates from biopolymer chitosan. The magnitudes of them are measured to be β＝6.5×10-6cm/W and n2＝1.5×10-10cm2/W, respectively.
Physical properties of Li2O-2B2O3 melt
Authors: Shi Xiu-Mei  , Wang Qiang  , Niu Xiao-Juan  , Li Chen-Xi  , Wang Feng-Ping  , Lu Kun-Quan  ,   (1)北京科技大学应用科学学院物理系,北京  100083; (2)北京科技大学应用科学学院物理系,北京  100083;中国科学院物理研究所, 北京  100080; (3)中国科学院物理研究所, 北京  100080
Published: December 2020

The density ρ and surface tension γ of lithium tetraborate melt have been systematically measured from 1100K up to about 1500K.The experimental results indicate that the melt density and surface tension decreased linearly with increasing temperature.The relationship of Li2Ｏ-２Ｂ２Ｏ３ melt density with temperature is ρ(T)=2.574-4.89×１０－４T.The density of Li2Ｏ-２Ｂ２Ｏ３ melt is 1.992g/cm3 at melting point.The temperature dependence of the surface tension of Li2Ｏ-２Ｂ２Ｏ３ melt is γ=262.8-4.59×10-2T.
Many-body contributions to the equation of state for highly compressed solid helium
Authors: Tian Chun-Ling  , Liu Fu-Sheng  , Cai Ling-Cang  , Jing Fu-Qian  ,   (1)西南交通大学高压物理实验室，成都  610031; (2)中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，绵阳  621900; (3)中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，绵阳  621900;西南大学物理系，重庆  400715; (4)中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，绵阳  621900;西南交通大学高压物理实验室，成都  610031
Published: December 2020

To investigate the significance of various many_body effects on the equation of state (EOS) of solid helium,the interaction energy of hcp crystal structure is expanded as a sum of two_ to five_body potentials in the present work. Each short_range many_body term between helium atom clusters is computed by means of Hartree_Fock (HF) self_consistent_field (SCF) method. It is indicated that at high densities the many_body expansion formula is an alternative series, in which two_, and four_body terms are positive, whereas three_ and five_body terms are negative. According to such an expansion of crystal interaction energy, the equation of state of solid helium at 0 K is obtained. The specific characteristics of each of the up to five_body contributions in highly compressed helium are discussed. Between 0.26 to 0.23nm, the interaction energy may be well described by two_ and three_body interactions. Over a distance range 0.23—0.20nm, truncated many_body expansion after the four_body term recovers the main part of atomic potential energy. Below 0.20nm the five_body contributions have to be included. The sum of two_ to five_body term accurately reproduces the atomic potential energy from 0.20 to 0.175nm. The inclusion up to five_body potential satisfactorily describes the available experimental data from 7.5 to 2.5 cm3/mol, corresponding to 1—60 GPa.
Epitaxial growth and superhardness effect in TiN/Al2O3 nanomultilayers
Authors: Kong Ming  , Wei Lun  , Dong Yun-Shan  , Li Ge-Yang  ,   上海交通大学金属基复合材料国家重点实验室,上海  200030
Published: December 2020

TiN/Al2O3 nanomultilayers with various Al2O3 layer thicknesses were prepared by multi_target magnetron sputtering. The chemical composition, microstructure and mechanical properties of these multilayers were characterized by energy dispersive X_ray spectrometry, X_ray diffraction, high_resolution transmission electron microscopy and nanoindentation. The result raveals that under the sputtering conditions, normally amorphous Al2O3 is forced to crystallize at very small layer thicknesses (2O3 layers form an amorphous structure and block the coherent growth of the multilayers, and thus the hardness decreases gradually.
Ordering and interaction of Fe and RE atoms on grain boundaries in ZA27 alloys
Authors: Liu Gui-Li  , Li Rong-De  ,   沈阳工业大学材料科学与工程学院，沈阳  110023
Published: December 2020

In order to reveal the behaviors of Fe and RE atoms on grain boundaries in ZA27 alloy theoretically, the atomic structure model of high angle grain boundary of α phase in ZA27 alloy was set up by using the concept of coincidence-site lattice(CSL). The electronic structure (state density, Fermi energy level, structure energy) of grain boundary was calculated using the recursion method. The clustering energy of alloying atoms was defined by the structure energy of grain boundary, and the clustering energies of Fe or RE atoms on grain boundary was calculated. The calculated results show that: the clustering energy of Fe or RE atoms gathered on grain boundary in ZA27 alloys is positive, so they can not form clusters and have the ordering tendency. Fe and RE atoms prefer to form steady inter_metallic compounds, and can form the negative electricity center on grain boundary in ZA27 alloys, thus reducing the Fermi energy level of grain boundary.
Beating oscillation of two-dimensional electrons gas in narrow gap dilute magnetic semiconductor
Authors: Zhu Bo  , Gui Yong-Sheng  , Qiu Zhi-Jun  , Zhou Wen-Zheng  , Yao Wei  , Guo Shao-Ling  , Chu Jun-Hao  , Zhang Fu-Jia  ,   (1)兰州大学物理系，兰州  730000; (2)兰州大学物理系，兰州  730000;中国科学院上海技术物理研究所红外物理国家重点实验室，上海  200083; (3)中国科学院上海技术物理研究所红外物理国家重点实验室，上海  200083
Published: December 2020

This paper studies the detailed beating oscillation in Shubnikov-de Hass (SdH) of magnetic two dimensional electron gas consisting of a modulation doped n type Hg0.82Cd0.16Mn0.02Te/Hg0.3Cd0.7Te first type quantum well, by which found that temperature, gate voltage are both bring the variety of magnetic resistance beating node position. By analyzing beating patterns, gate voltage dependent Rashba spin-orbit splitting can be separated from temperature dependent giant Zeeman splitting.
Fabrication and properties of nano metric tunneling junction
Authors: Kuang Deng-Feng  , Liu Qing-Gang  , Hu Xiao-Tang  , Hu Liu-Chang  , Guo Wei-Lian  ,   (1)精密测试计量技术及仪器国家重点实验室,天津大学精密仪器与光电子工程学院,天津  300072; (2)南开大学现代光学研究所,天津  300071; (3)天津大学电子信息工程学院,天津  300072
Published: December 2020

Applicable nano metric titanium-titanium oxide line-titanium tunneling junction was fabricated with dual-facing target sputtering,micro-electronic optical lithography and atomic force microscope anodic oxidation.The thickness of titanium film of the fabricated junction was 3nm and the width of the titanium oxide line was 60.5nm.The I-V curve of the tunneling junction at room temperature clearly indicates the Coulomb blockade effect.
Quantum effect of dissipative mesoscopic capacitance coupled circuit
Authors: Qiu Shen-Yu  , Cai Shao-Hong  ,   (1)贵州大学物理系，贵阳  550025; (2)贵州大学物理系，贵阳  550025;贵阳财经学院，贵阳  550004
Published: December 2020

The dissipative mesoscopic coupled circuits are obtained by the method of damped harmonic oscillator quantization . The quantum fluctuations of charge and current in an arbitrary eigenstate of the system have also been given .The result shows that the quantum fluctuations of the charge and current exist in all states, and the fluctuations in the component circuits are corelated.
The research on metal induced crystallization with chemical source
Authors: Zhao Shu-Yun  , Wu Chun-Ya  , Li Juan  , Liu Jian-Ping  , Zhang Xiao-Dan  , Zhang Li-Zhu  , Meng Zhi-Guo  , Xiong Shao-Zhen  ,   南开大学光电子器件与技术研究所，天津  300071；天津市光电子薄膜器件与技术重点实验室，天津  300071；教育部光电信息技术科学重点实验室，天津  300071
Published: December 2020

The metal induced crystallization with chemical source on different silicon based films is studied. All amorphous silicon films deposited by LPCVD, RF-PECVD and VHF-PECVD have been crystallized. However, the a-Si films prepared by VHF-PECVD seems to have crystallized better. The crystallization was also affected by the concentration of the chemical solution. Under a certain conditions, the polycrystalline silicon crystallized with the solution of 10000ppm has larger grain size than that with 5000ppm solution. The annealing atmosphere also affects the crystallization process. Compared with the physical inducing source, the chemical inducing source gives different micro-crystallization structures. For the metal induced crystallization, the chemical source tends to be more advantageous.
Single nucleon potential and effective mass with ground state correlations in hot nuclear matter
Authors: Lu Guang-Cheng  , Li Zeng-Hua  , Zuo Wei  , Luo Pei-Yan  ,   中国科学院近代物理研究所, 兰州  730000;中国科学院研究生院, 北京  100039
Published: December 2020

In the framework of the finite temperature Brueckner-Hartree-Fock approach including the contribution of the microscopic three-body force, the single nuclear potential and the nucleon effective mass in hot nuclear matter at various temperatures and densities have been calculated by using the hole-line expansion for mass operator, and the effects of the three-body forces and the ground state correlations on the single nucleon potential have been investigated. It is shown that both the ground state correlations and the three-body force affect considerably the density and temperature dependence of the single nucleon potential. The rearrangement correction in the single nucleon potential is repulsive and it reduces remarkably the attraction of the single nucleon potential in the low-momentum region. The rearrangement contribution due to the ground state correlations becomes smaller as the temperature rises up and becomes larger as the density increases. The effect of the three-body force on the ground state correlations is to reduce the contribution of rearrangement. At high densities, the single nucleon potential containing both the rearrangement correction and the contribution of the three-body force becomes more repulsive as the temperature increases.
Study on the superheating phenomenon of YBCO thin film
Authors: Cai Yan-Qing  , Yao Xin  , Li Gang  ,   上海交通大学物理系，上海  200240
Published: December 2020

By using high temperature optical microscopy (HTOM), the superheating phenomenon in YBa2Cu3Oz (Y123) oxide thin film was found by in-situ observation of its melting process. The origin of superheating is discussed in combination with the analysis of XRD pole figure and the unwettability of Ba-Cu-O melts. Besides, the relationship between the microstructure of YBCO thin film and its superheating degree was investigated. The film with lower fraction of interface defects is believed to have higher superheating degree. The results deduced from semi-coherent interface energy theory are in good agreement with the experimental results of HTOM, AFM and XRD.
Structure, spin reorientation and M?ssbauer spectra of Tb0.3Dy0.7(Fe0.9T0.1)1.95 alloys
Authors: Zheng Xiao-Ping  , Zhang Pei-Feng  , Fan Duo-Wang  , Li Fa-Shen  , Hao Yuan  ,   (1)兰州交通大学光电技术与智能控制教育部重点实验室，兰州  730070; (2)兰州交通大学光电技术与智能控制教育部重点实验室，兰州  730070;兰州师范高等专科学校电子信息科学与技术研究所，兰州  730070; (3)兰州交通大学光电技术与智能控制教育部重点实验室，兰州  730070;兰州数学与统计学院，兰州  730000; (4)兰州理工大学甘肃省有色金属新材料重点实验室，兰州  730080; (5)兰州数学与统计学院，兰州  730000
Published: December 2020

The effect of T substitution for Fe on the structure, spin reorientation and Mssbauer spectra of a series of Tb0.3Dy0.7(Fe0.9T0.1)1.95 (T=Mn，Fe，Co，B，Al，Ga) alloys at room temperature has been investigated systemically. The X-ray result shows that all samples are single phase having the cubic Laves-phase structure (C15). The analysis of the Mssbauer spectra indicates that the easy magnetization direction in the {110} plane deviates slightly from the main axis of symmetry for Al and Ga substitution, but remains in the ［111］ direction for B, Mn and Co substitution. The hyperfine field decreases slightly for Al and Ga substitution, does not change for B，Mn substitution and increases greatly for Co substitution. With the substitution of all elements but Co, the isomer shift and the quaduple splitting always increase.
Entrance channel effects on the role of isospin-dependent momentum interaction in isospin fractionation in heavy ion collisions
Authors: Liu Jian-Ye  , Xing Yong-Zhong  , Guo Wen-Jun  ,   (1)天水师范学院数理信息学院基础物理研究所,  天水  741000;中国科学院近代物理研究所,  兰州  730000; (2)天水师范学院数理信息学院基础物理研究所,  天水  741000;中国科学院近代物理研究所,  兰州  730000;兰州重离子加速器国家实验室原子核理论中心, 兰州  730000; (3)中国科学院近代物理研究所,  兰州  730000;南京大学物理系，南京  210008
Published: December 2020

An isospin degree of freedom is inserted into the momentum dependent interaction in the quantum molecular dynamics model to obtain an isospin dependent momentum interaction given in a form practically usable in isospin dependent quantum molecular dynamics model. We investigate the entrance channel effects for the role of isospin momentum dependent interaction on the isospin fractionation ratio and its dynamical mechanism in the intermediate energy heavy ion collisions. It is found that the isospin dependent momentum interaction induces a significant reduction of isospin fractionation ratio under all entrance channel conditions. However the strong dependence of isospin fractionation ratio on the symmetry potential is preserved after considering the isospin degree of freedom in the momentum dependent interaction.
Analysis of the all-angle polarization beam splitting effect of the multi-layered wavy films
Authors: Li Yi-Yu  , Gu Pei-Fu  , Li Ming-Yu  , Liu Xu  , Yang Hui  ,   浙江大学现代光学仪器国家重点实验室,杭州  310027
Published: December 2020

The necessary conditions of all-angle polarization beam splitting effect of photonic crystal is discussed from the aspects of band structure and equal frequency surface. The conservation law of the tangential k-vector component is illustrated in the equal frequency surface. In order to theoretically verify the all-angle polarization beam splitting effect, finite-difference time-domain (FDTD) method is employed to simulate the propagation of Gauss beam in the multi-layered wavy films, getting the transmission coefficients for the TE and TM modes in the angle range from 8° to 89° respectively.
Micro-Raman scattering study of hexagonal InGaN epitaxial layer
Authors: Wang Rui-Min  , Chen Guang-De  , Zhu You-Zhang  ,   西安交通大学理学院，西安  710049
Published: December 2020

Hexagonal InxGa1-xN film grown by metalorganic chemical vapor deposition (MOCVD) was studied by Micro-Raman scattering and X-ray diffraction. The phase separation was observed in InxGa1-xN, the biaxial stress was measured by both Raman and X-ray diffraction. In Raman spectroscopy, the A1(LO) mode of InxGa1-xN is absent. Instead, the LO phonon-plasmon coupled mode (LPP+) was observed at about 778 cm-1. The carrier concentration was determined by the frequency of the coupled mode. The E2 and A1(TO)modes of InxGa1-xN layer exhibit a down-shift compare to those of GaN layer. At low temperature, the peak induced by electronic transition was observed in Raman spectra of InxGa1-xN.
Random lasing in ZnO nanparticles
Authors: Chen Lei  , Lou Qi-Hong  , Wang Zhi-Jiang  , Dong Jing-Xing  , Wei Yun-Rong  ,   中国科学院上海光学精密机械研究所，上海  201800
Published: December 2020

In our experiment, the ZnO nanoparticles(diameter about 100nm) are optically pumped by the third harmonics (355 nm wavelength) of a pulsed Nd:YAG laser (30Hz repetition ration rate, 8ns pulse width). Laser-like light emission was observed in the ZnO nanoparticles. We simulate the ZnO particle density transport versus mean free path using the ring cavity theory. The result shows that random lasing can be produced in the ZnO particle with Nd:YAG (pulse width 8 ns).
Stability of mixed phase silicon thin film material under light soaking
Authors: Wang Yan  , Han Xiao-Yan  , Ren Hui-Zhi  , Hou Guo-Fu  , Guo Qun-Chao  , Zhu Feng  , Zhang De-Kun  , Sun Jian  , Xue Jun-Ming  , Zhao Ying  , Geng Xin-Hua  ,   (1)南开大学光电子薄膜器件与技术研究所，光电信息技术科学教育部重点实验室，光电子薄膜器件与技术天津市重点实验室，天津  300071; (2)南开大学光电子薄膜器件与技术研究所，光电信息技术科学教育部重点实验室，光电子薄膜器件与技术天津市重点实验室，天津  300071;河北工业大学材料科学与工程学院，天津  300130
Published: December 2020

Silicon thin films material with different crystalline ratio (Xc) have been deposited with varying silane content of source gases in the PECVD process. We have researched how hydrogen content affects the material and the relationship between micro-structure and optoelectronic properties. Light soaking experiment was then performed. By comparing the changes in the properties before and after irradiation, we conclude that the amorphous region is responsible to the degradation of the photoelectronic property. The mixed phase amorphous silicon degrades less and is more stable than component the common amorphous silicon. The highly crystallized silicon is stable against light soaking. The microcrystalline silicon near the threshold is not so stable as the highly crystallized one, but its optoelectronic property is more suitable than the others for making microcrystalline silicon solar cells.
Effect of lattice site position fluctuation on the electronic structure of DNA
Authors: Gao Xu-Tuan  , Fu Xue  , Song Jun  , Liu De-Sheng  , Xie Shi-Jie  ,   (1)山东大学物理与微电子学院，晶体材料国家重点实验室，济南  250100; (2)山东大学物理与微电子学院，晶体材料国家重点实验室，济南  250100;山东理工大学物理学院，淄博  255049
Published: December 2020

In the framework of a tight binding model, effect of the lattice site position fluctuation on the energy band and the electronic states of DNA is studied by means of stimulation with the square distribution. Effect of the position fluctuation on the conductivity of DNA is also analyzed. It is found that with the enhancement of the fluctuation the band gap becomes smaller and the electronic states become localized. The electronic states around the bottom of conductance band appear apparently localized with a room temperature fluctuation. Therefore, even if these base pairs were arranged orderly, the band resonant charge transport mechanism might not be suitable for DNA at room temperature.
Study of the structural and optical properties of microcrystalline silicon film
Authors: Gao Xiao-Yong  , Li Rui  , Chen Yong-Sheng  , Lu Jing-Xiao  , Liu Ping  , Feng Tuan-Hui  , Wang Hong-Juan  , Yang Shi-E  ,   郑州大学教育部材料物理重点实验室,郑州  450052
Published: December 2020

Using high-deposition-pressure technique, high-quality microcrystalline silicon film was prepared by radio-frequency plasma enhanced chemical vapor deposition (RF-PECVD) combined with rapid thermal treatment. The volume fractions of the amorphous and microcrystalline phases and optical properties of microcrystalline silicon were carefully studied by Raman spectra, reflectance spectra and transmittance spectra. The results show a red shift of the absorption edge of microcrystalline silicon, which can be due to the increase in the volume fractions of the amorphous and microcrystalline phase and decrease in the band tail states.
Raman lidar for profiling atmospheric CO2
Authors: Hong Guang-Lie  , Zhang Yin-Chao  , Zhao Yue-Feng  , Shao Shi-Sheng  , Tan Kun  , Hu Huan-Ling  ,   (1)中国科学院安徽光学精密机械研究所大气光学室，合肥  230031; (2)中国科学院研究生院，北京  100039;中国科学院安徽光学精密机械研究所大气光学室，合肥  230031
Published: December 2020

Based on laser atmosphere backscattering spectrum, the design and experiment of a Raman lidar system for measurement of atmospheric CO2 are presented. 354.7nm third harmonic of Nd∶YAG laser is transmitted with 350mJ pulse energy and repetition rate of 20Hz. The receiver employs a photomultiplier tube with quantum efficiency of 25% and 200MHz photon counter, and it detects Raman backscattering 371.66nm(shift 1285cm-1) signal. At 1h integration, the signal to noise ratio below 2.5km is greater than 8. Combinatorial filter is used to reject interference presented by 354.7nm intense Mie-Rayleigh backscattering and 375.4nm Raman backscattering from O2. We compare the Raman return signal at 371.66nm from atmospheric CO2 with the reference Raman return signal at 386.7nm from atmospheric N2 to retrieve the atmospheric CO2 concentration.
Quantum entropy of cylindrical black hole in Anti-de Sitter space-time
Authors: Li Gu-Qiang  ,   湛江师范学院信息科技学院，广东湛江  524048
Published: December 2020

By using the brick-wall model, the quantum entropy of a cylindrical black hole in Anti-de Sitter space-time arising from the massless Dirac field is discussed. It is shown that the quantum entropy has both linear and logarithmical divergences if the usual contribution from the vacuum surrounding the system is ignored, and the whole expression does not take the form of the scalar one. Both the whole logarithmic term and the subleading logarithmic term which relates to the spins of the Dirac particles are always positive.
Factors Affecting Consumers' Intention to Buy Foreign Brands - An Empirical Survey in Serbia
Authors: Tomašević Dragana , Gašević Dragana , Vranješ Marija
Published: December 2020

Abstract: Research question: The purpose of this paper is to analyze the factors that influence consumers' intentions when buying foreign brands, and then the purchase itself. Motivation: The business environment is experiencing an extensive change and it has become very demanding for companies to retain customers as well as market share. Companies must learn to adapt to changes in order to survive in the market, and therefore need to be aware of the needs of their customers and their purchasing decisions. The rise in consumer awareness has led consumers to opt for well-known and high-quality foreign brands. Hence, if companies hope to outperform their competitors, they need to persuade consumers to purchase their products and brands. Idea: The main objective of the research is to be based on previous research in this field to find out whether perceived quality, prestige, perceived value and environmental impact affect the intention of domestic consumers to buy foreign brands, and consequently the purchase of these foreign brands. Data: The survey was conducted on the territory of the Republic of Serbia by means of a questionnaire and included 158 respondents. Data were collected from the respondents electronically during a period of about one month. Tools: Statistical analyses of all collected data (utilizing linear correlation, multiple regression analysis, T-test of sample independence and ANOVA) were used to draw conclusions about the relationships between the observed variables and to determine differences in the mean values between individual categories of respondents in terms of buying foreign brands. Findings: Multiple regression analysis confirmed the statistically significant influence of perceived quality and perceived value on the intention of consumers in Serbia to buy foreign brands. Other factors do not have a statistically significant effect on consumer intention. Also, a simple regression analysis revealed a statistically significant influence of consumer intention on the act of purchase. At the very end of the paper, it was determined that statistically significant differences regarding the purchase of foreign brands existed when respondents were observed by gender and education levels, while age did not have a statistical significance. Contribution: This research has a scientific and practical contribution in terms of collecting information about the factors that influence the consumers` intension to buy foreign brands.
Oncolytic effects of the recombinant Newcastle disease virus, rAF-IL12, against colon cancer cells in vitro and in tumor-challenged NCr-Foxn1nu nude mice
Authors: Syed Najmuddin Syed Umar Faruq , Amin Zahiah Mohamed , Tan Sheau Wei , Yeap Swee Keong , Kalyanasundram Jeevanathan , Veerakumarasivam Abhimanyu , Chan Soon Choy , Chia Suet Lin , Yusoff Khatijah , Alitheen Noorjahan Banu
Published: December 2020

Colon cancer remains one of the main cancers causing death in men and women worldwide as certain colon cancer subtypes are resistant to conventional treatments and the development of new cancer therapies remains elusive. Alternative modalities such as the use of viral-based therapeutic cancer vaccine is still limited, with only the herpes simplex virus (HSV) expressing granulocyte-macrophage colony- stimulating factor (GM-CSF) or talimogene laherparepvec (T-Vec) being approved in the USA and Europe so far. Therefore, it is imperative to continue the search for a new treatment modality. This current study evaluates a combinatorial therapy between the oncolytic Newcastle disease virus (NDV) and interleukin-12 (IL-12) cytokine as a potential therapeutic vaccine to the current anti-cancer drugs. Several in vitro analyses such as MTT assay, Annexin V/FITC flow cytometry, and cell cycle assay were performed to evaluate the cytotoxicity effect of recombinant NDV, rAF-IL12. Meanwhile, serum cytokine, serum biochemical, histopathology of organs and TUNEL assay were carried out to assess the anti-tumoral effects of rAF-IL12 in HT29 tumor-challenged nude mice. The apoptosis mechanism underlying the effect of rAF-IL12 treatment was also investigated using NanoString Gene expression analysis. The recombinant NDV, rAF-IL12 replicated in HT29 colon cancer cells as did its parental virus, AF2240-i. The rAF-IL12 treatment had slightly better cytotoxicity effects towards HT29 cancer cells when compared to the AF2240-i as revealed by the MTT, Annexin V FITC and cell cycle assay. Meanwhile, the 28-day treatment with rAF-IL12 had significantly (p< 0.05) perturbed the growth and progression of HT29 tumor in NCr-Foxn1nu nude mice when compared to the untreated and parental wild-type NDV strain AF2240-i. The rAF-IL12 also modulated the immune system in nude mice by significantly (p< 0.05) increased the level of IL-2, IL-12, and IFN-γ cytokines. Treatment with rAF-IL12 had also significantly (p< 0.05) increased the expression level of apoptosis-related genes such as Fas, caspase-8, BID, BAX, Smad3 and granzyme B in vitro and in vivo. Besides, rAF-IL12 intra-tumoral delivery was considered safe and was not hazardous to the host as evidenced in pathophysiology of the normal tissues and organs of the mice as well as from the serum biochemistry profile of liver and kidney. Therefore, this study proves that rAF-IL12 had better cytotoxicity effects than its parental AF2240-i and could potentially be an ideal treatment for colon cancer in the near future.
LITERATURA CENSURADA: O POLITICAMENTE (IN)CORRETO NA LITERATURA PARA CRIANÇAS E JOVENS
Authors: Fernandes Sampaio de Souza Danilo
Published: December 2020

Na contemporaneidade, a literatura destinada à infância e à juventude vem se destacando em termos de qualidade estética, recebendo, cada vez mais, destaque da crítica especializada. Temáticas e conflitos considerados polêmicos, a exemplo da morte, dos relacionamentos, da violência, do sexo, entre outros, estão presentes nas obras infantis e juvenis, todavia, na maioria das vezes, são significativas as restrições que pais e educadores fazem com a justificativa de que tais obras podem causar sentimentos negativos aos seus leitores. Assim, neste estudo, categorizado metodologicamente como qualitativo e de cunho bibliográfico-documental, analisaremos, por meio de três reportagens que evidenciam polêmicas com obras literárias no ambiente escolar, como ainda hoje a sociedade e a escola censuram obras literárias que fogem ao politicamente correto, demonstrando, assim, um alinhamento com a visão platônica da literatura. Respaldam nossas análises os estudos de Candido (1999), Hunt (2013), Martha (2011, 2013), entre outros autores.
PRÁTICAS DE LETRAMENTOS EM ESCRITA ACADÊMICA-CIENTÍFICA COM LITERATURA
Authors: Vieira Barbosa Isabela , Leire Roepke Jacqueline , Mara Koerner Rosana
Published: December 2020

O objetivo deste artigo é compreender as práticas de letramentos com literatura realizadas por uma mestra em educação ao longo da construção de sua dissertação. Nesse sentido, a presente pesquisa analisou a dissertação de mestrado à luz dos Estudos dos Letramentos através da perspectiva dos letramentos acadêmicos. Os dados apontam que algumas das marcas deixadas pelas práticas de letramentos com literatura durante a infância foram contributivas na formação leitora da autora da dissertação, e inclusive emergiram ao longo da dissertação. Desse modo, podemos observar, ao longo dos dados analisados, que as práticas prévias ao ingresso na formação acadêmica exerceram influências positivas para o engajamento da autora com práticas de literatura em diferentes campos do saber.
A IMAGEM E A PALAVRA EM FERREIRA DE CASTRO
Authors: Monteiro Fonseca Esperança , Natália Amarante Maria
Published: December 2020

Este artigo procura compreender, de um ponto de vista geral, a relação que existe entre a imagem e a palavra nas capas dos principais romances de Ferreira de Castro, focalizando-se em especial na sua obra de referência: “A Selva”. Pelas suas múltiplas edições, em diversas línguas, a obra possui variados motivos de capa, desde o elemento floresta, ao rio, aos animais selvagens, à presença de inúmeras figuras humanas, ora indígenas, ora africanas, ora européias. A metodologia usada, tendo em conta que se trata de um estudo em progresso, é sobretudo de âmbito qualitativo, alicerçando-se numa análise descritiva, semiótica e interpretativa das sinopses e dos temas presentes num corpus composto por 25 capas de “A Selva”. Dessa análise destaca-se, desde já, a presença da floresta em detrimento da árvore, a figura masculina em vez de feminina, a cor verde em relação às demais. Procurar-se-á refletir ainda sobre os vários sentidos ocultos das capas propostas, antecedendo esse estudo com uma interpretação da relação imagem-texto de outras obras relevantes do autor.
O “EGO” DESEJANTE: UMA LEITURA POSSÍVEL DE A TERCEIRA MARGEM DO RIO, DE JOÃO GUIMARÃES ROSA
Authors: Freitag Felipe
Published: December 2020

ROSA, João Guimarães. A terceira margem do rio. Primeiras estórias, v. 14, p. 32-37, 1988.
The Trend and Growth Rate of Brinjal in Dhamtari Block and Chhattisgarh State, India
Authors: Sahu Reena , Raghuwanshi N. K. , Patel Ghanshyam
Published: December 2020

The research work was carried out with objectives to estimate the trend and growth rate in area, production & productivity of brinjal in Dhamtari block of Chhattisgarh state. The study was conducted in Dhamtari district which comprises of 4 blocks and among which Dhamtari block occupies maximum area and production of Brinjal. The secondary data was collected from Directorate of Horticulture, Directorate of Land record, Directorate of Economics and Statistics, and annual horticultural statistics, Raipur Chhattisgarh. The annual area, production and productivity of Brinjal in Dhamtari district is collected from Directorate of Horticulture Dhamtari, Chhattisgarh. The secondary data were collected for the last 10 years (2006-07 to 2015-16). Compound growth rate and simple growth rate were used to analyse the collected data. To reveal the behavior of selected variables in the district over time, regression analysis was carried out. The following form of linear production function was fitted by least square technique to estimate the trend and growth rate of the selected variable for the study period. Area, production and productivity of Brinjal in Chhattisgarh state was found to be increased at highly significant rate, whereas, in Dhamtari district, it was found that only area of Brinjal increased at highly significant rate.
Detergent Use Practices in Nepal: A Cross-Sectional Online Survey
Authors: Joshi Saraswati Kumari , Adhikari Nisha , Joshi Shristi , Joshi Sita Kumari , Joshi Durga Kumari , Bhandari Ravin , Joshi Dirgha Raj
Published: December 2020

Every year the use of detergent is increasing and safety concerns about detergent are also increasing. However, in developing countries safety concerns about detergent is still a neglected topic. Therefore, the purpose of this study is to evaluate the knowledge, attitude, and practices (KAP) of the general public towards the use of detergent. An online-based cross-sectional study was performed via sharing self-developed online KAP questionnaires and filled out by participants. The basic knowledge about detergent, its safety concern, and other related questions were used for the KAP assessments. A total of 510 participants took part in this study. The participants had mixed responses to the questions such as; [1]  the majority were using powder detergent (87.45%); [2] perceptions about detergent (an agent for cleansing clothes (48.04%), a chemical agent (39.02%)); [3] the purpose of using detergent (to remove dirt (48.04%), for easiness of cleaning (45.1%)); [4] the cost of detergent (affordable (80%), expensive (10.98%)); [5] the selection of detergent (based on previous satisfaction (60.98%), brand name (19.02%));  [6] cause of not using particular brand detergent next time is (poor quality (75.1%), expensive (18.04%)); [7] mostly used brands (Wheel (35.69%), Ghadi (16.08%) and Patanjali (7.06%)); [8] safety concerns (only 8.82% used gloves during using detergent and only 50% realized the detergent can harm their skin, 67.84% have awareness that the detergent contaminates the environment, 10% experienced dryness of skin, 0.98% redness/allergy)); [9] 77.06% don’t have a washing machine; [10] soaking practice (21.37% start washing immediately after the addition of detergent, only 32.16% soak clothes for 20 to 60 minutes)); [11] waste water management (80.4% throw the detergent waste water to the normal sewage, 19.6% throw separately); [12] 37.45% always use soap along with powder detergent while washing clothes; [13] detergent stability problem (absorb moisture and get wet easily (64.31%) color change (16.08%) and dryness (10.78%)); [14] 28.63% prefer colorful detergent and 42.94% observed the color transfer from detergent to clothes; only 37.45% have experience of using herbal detergent; [15] laundry detergent also used for other purposes (wash dishes (19.61%), to wash hands (5.49%) and even body washing (1.76%)); [16] 19.61% of the participants’ mothers wash their clothes; [17] the majority of the participants realized the dirtiness of country people is due to poverty (58.04%). This study shows moderate awareness regarding the KAP of detergent use, management, and toxicity. Therefore, it can be derived that continuous education is needed about detergent.