Anhui Normal University

About: Anhui Normal University is a education organization based out in Wuhu, China. It is known for research contribution in the topics: Catalysis & Population. The organization has 7955 authors who have published 7309 publications receiving 117443 citations.

Propagation of elegant Laguerre–Gaussian beam in non-Kolmogorov turbulence

Abstract: The analytical formulas for the average intensity and the beam width of the elegant Laguerre-Gaussian beam (ELGB) in non-Kolmogorov turbulence have been derived based on the extended Huygens-Fresnel principle. Numerical results reveal that the ELGB converts to Gaussian form quicker for smaller values of beam order and for smaller wavelengths. The root-mean-square (rms) beam width of ELGB increases markedly with the propagation distance for higher beam order, smaller waist width, and larger wavelength. Furthermore, discussions of the influence of ELGB by the non-Kolmogorov turbulence reveal that the normalized intensity distribution of ELGB converts into Gaussian form more quickly and that the rms beam width of ELGB increases more rapidly in non-Kolmogorov turbulence with smaller parameter α, larger outer scale, smaller inner scale and larger structure constant.

Silver and gold icosahedra: one-pot water-based synthesis and their superior performance in the electrocatalysis for oxygen reduction reactions in alkaline media.

Abstract: Much effort has gone into generating polyhedral noble metal nanostructures because of their superior electrocatalytic activities for fuel cells. Herein, we report uniform, high-yield icosahedral silver and gold nanoparticles by using a facile one-pot, seedless, water-based approach that incorporates polyvinyl pyrrolidone and ammonia. Electrocatalysis of the oxygen-reduction reaction was carried out in alkaline media to evaluate the performance of the icosahedral nanoparticles. They showed excellent stability and much higher electrocatalytic activity than the spherelike nanoparticles; they display a positive shift in reduction peak potential for O2 of 0.14 and 0.05 V, while the reduction peak currents of the silver and gold icosahedra are 1.5- and 1.6-fold, respectively, better than the spherelike nanoparticles. More importantly, the icosahedral nanoparticles display electrocatalytic activities comparable with commercial Pt/C electrocatalysts. The facile preparation of icosahedral silver and gold nanoparticles and their superior performance in the oxygen reduction reaction render them attractive replacements for Pt as cathode electrocatalysts in alkaline fuel cells.

On Efficient and Robust Anonymization for Privacy Protection on Massive Streaming Categorical Information

Abstract: Protecting users’ privacy when transmitting a large amount of data over the Internet is becoming increasingly important nowadays. In this paper, we focus on the streaming categorical information and propose a novel anonymization technique for providing a strong privacy protection to safeguard against privacy disclosure and information tampering. Our technique utilizes an innovative two-phase anonymization approach which is very easy to implement, highly efficient in terms of speed and communication and is robust against possible tampering from adversaries. Extensive experimental evaluation that is conducted demonstrates that our technique is very efficient and more robust than the existing method.

A new technology for the treatment of chromium electroplating wastewater based on biosorption

Abstract: In this work, an electroplating wastewater treatment based on biosorption followed by flocculation/precipitation is proposed. Biosorption was carried out by using exhausted coffee which has proved to be an efficient low cost sorbent for metal ions and reducing agent of hexavalent chromium in our previous works. After biosorption Cr(VI) concentration in the effluent met the wastewater treatment plant discharge regulation limit for hexavalent chromium (0.5 mg L −1 ). The addition of a suitable concentration of coagulant/flocculant resulted in the precipitation of residual trivalent chromium and other metal ions. The high correlation coefficients between Cr(VI) and Cr(III) and conductivity and pH values measured during the biosorption process highlighted the possible use of these two parameters to monitor the process. Indeed, these two parameters measured online resulted to be effective indicators of both process development and the end point of the process. The merits of the proposed treatment which are considered over other techniques are much lower electrical energy consumption; less amount of chemicals addition and the possibility of chromium recovery from the sorbent at a quite high level of purity. Moreover, biosorption is an eco-friendly process and implies the reuse of a product at the end of its useful life rather than being disposed in landfill.