Hengyang Normal University

About: Hengyang Normal University is a education organization based out in Hengyang, China. It is known for research contribution in the topics: Graphene & Adsorption. The organization has 1087 authors who have published 1280 publications receiving 13850 citations. The organization is also known as: Hengyang Teachers' College & Héngyáng Shīfàn Xuéyuàn.

A Class of Mbius Transformations in Infinite Dimension

Abstract: By using the expression of Mbius transformations in infinite dimension through Clifford matrices in this paper,five equivalent statements that a Mbius transformation in infinite dimension is an isometry with respect to the chordal metric are proved.A simple application is given,which is a generalization of the result of A.F.Beardon.

The Contradictions & Countermeasures of the Teaching Quality Evaluation of College Teachers

Abstract: Teaching quality in college is one of the key factors affecting education quality.The implementation of teaching quality evaluation attract much attention in colleges.But in practice,there exists many contradictions in evaluation aim,content,process and results.Therefore,how to solve these problems is a basis on which the teaching evaluation is scientifically implemented.

Adaptive Block Compressive Sensing for Noisy Images

Abstract: This paper develops a novel adaptive gradient-based block compressive sensing (AGbBCS_SP) methodology for noisy image compression and reconstruction. The AGbBCS_SP approach splits an image into blocks by maximizing their sparsity, and reconstructs images by solving a convex optimization problem. The main contribution is to provide an adaptive method for block shape selection, improving noisy image reconstruction performance. Experimental results with different image sets indicate that our AGbBCS_SP method is able to achieve better performance, in terms of peak signal to noise ratio (PSNR) and computational cost, than several classical algorithms.

Supersensitive estimation of the coupling rate in cavity optomechanics with an impurity-doped Bose-Einstein condensate

Abstract: We propose a scheme to implement a supersensitive estimation of the coupling strength in a hybrid optomechanical system which consists of a cavity-Bose-Einstein condensate system coupled to an impurity. This method can dramatically improve the estimation precision even when the involved photon number is small. The quantum Fisher information indicates that the Heisenberg scale sensitivity of the coupling rate could be obtained when the photon loss rate is smaller than the corresponding critical value in the input of either coherent state or squeezed state. The critical photon decay rate for the coherent state is larger than that of the squeezed state, and the coherent state input case is more robust against the photon loss than the squeezed state case. We also present the measurement scheme which can saturate the quantum Cramer-Rao bound.

A two‐dimensional holmium(III) coordination polymer: poly[aminotris(μ‐4‐aminobenzoato)holmium(III)]

Abstract: In the title compound, [Ho(C7H6NO2)3(H2O)]n, a two-dimensional coordination polymer, the eight-coordinate HoIII ions are bridged by two carboxyl­ate groups from two 4-amino­benzoate ligands, forming a centrosymmetric dinuclear block. These blocks are further connected by 4-amino­benzoate ligands, yielding a two-dimensional network; a three-dimensional supra­molecular structure is then formed via hydrogen bonds.