Chaohu, China
Chaohu, China

Chaohu University , located in Chaohu, Anhui Province of China, is an institution of higher learning under jurisdiction of Anhui Province.The university was founded in 1977 as Chaohu Specialized Normal School. Upon the approval of the Ministry of Education in April 2002, it was elevated and renamed Chaohu University, affiliated to the Education Bureau of Anhui Province.Chaohu University has a land area of 650,000 sq meters, among which the construction area covers 250,000 sq meters. The university publishes the "Journal of Chaohu University".Current president: Dong Wuqing. Wikipedia.

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Wan X.-J.,Chaohu University
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2017

3-Nitro-4-(5H-1-tetrazolyl)- furazan(compound 1) was synthesized with 3-amino-4-nitrofurazan(ANF) as raw material reacted with triethyl orthoformate and sodium azide, then compound 1 reacted with ammonia spirit via amination at a low temperature to get 3-amino-4-(5H-1-tetrazolyl)furazan (compound 2), finally, 3, 4-bis(5H-1-tetrazolyl)furazan (compound 3) was obtained by the reaction of compound 2 with triethyl orthoformate and sodium azide. The structures of the three compounds were characterized by IR, 1H NMR, 13C NMR and elemental analysis. The standard enthalpy of formation, theoretical density, detonation velocity and detonation pressure of compounds 1-3 were predicted by density functional theory B3LYP/6-311+G** method. The results show that by controlling the reaction conditions, the optimal conditions for preparing compound 2 are determined as: reaction time 3h, molar ratio of compound 1 and ammonia 1∶2, reaction temperature -10℃. The total yield of compound 2 is 70%. Compounds 1-3 have higher positive enthalpy of formation because of the introduction of tetrazole ring. In which, compound 3 has the highest enthalpy of formation, reaching 1090.07kJ/mol. Compound 1 has equal detonation velocity and detonation pressure as RDX. Compounds 1-3 have better detonation properties than TNT except compound 2 has a lower density. Comprehensively compared with compounds 2 and 3, the performance of compound 1 is the best, with density of 1.76g/cm3, detonation velocity 8590m/s and detonation pressure 32.3GPa. © 2017, Editorial Board of Journal of Explosives & Propellants. All right reserved.

Chengji W.,Chaohu University | Shoujun H.,Chaohu University
IJC Metabolic and Endocrine | Year: 2016

Objective cardioprotective effect and mechanism of exercise training up-regulating the expression of M3 receptor on myocardial infarction. Methods 48 male Sprague-Dawley rats were randomly assigned to three groups (n = 16, per group):control group (C), myocardial infarction group (MI), moderate-intensity aerobic exercise with myocardial infarction group (ME). Rats in C group were breed normally. MI was induced by ligation of the left anterior descending (LAD) coronary artery in MI group. Rats in ME group took treadmill exercise for 8 weeks. after 1 week post-operation. ME group running began at the speed of 10 m/min for 5 min, then accelerated from 3 m/min to 16 m/min. The total time of ME is 60 min, 5 d/week, for 8 weeks. LVSP, LVEDP, ± dp/dtmax and the cardiac function changes were measured after training. Myocardial collagen fibers were observed histological section and Masson staining. The expression of myocardial M3 R was observed and analyzed by immunofluorescence. The myocardial protein content of M3 R, MEK1/2,P-ERK1/2,ERK1/2 and apoptosis related Bcl-2 and Bax was assayed by Western blot. Results Compared with the C group, MI increased CVF and LVEDP (P ˂ 0.01), but decreased LVSP and − dp/dtmax (P ˂ 0.01). After MI myocardial M3 positive staining, after MI M3 protein expression significantly higher compared with the C group (P ˂ 0.01), MEK1/2,P-ERK1/2/ERK1/2 protein expression were significantly increased compared with the C group (P ˂ 0.01, P ˂ 0.01), after the MI the Bcl-2/Bax expression significantly reduced compared with the C group (P ˂ 0.01). ME group CVF%, LVEDP significantly reduced compared with the MI group (P ˂ 0.01), but − dp/dtmax significantly increased (P ˂ 0.01). ME group was identified myocardial M3, compared with the MI group, M3 protein expression significantly increased (P ˂ 0.01), but Bcl-2/Bax expression significantly reduced (P ˂ 0.01). Conclusions moderate-intensity aerobic exercise can up-regulated the M3 R-MEK1/2-ERK1/2 signaling pathway, thus inhibit the apoptosis of myocardial cells, reduced myocardial interstitial fibrosis and promote cardiac function after MI. © 2016

Li S.,Chaohu University
Proceedings - 2011 International Conference on Network Computing and Information Security, NCIS 2011 | Year: 2011

The problem of speech denoising using wavelet packet decomposition algorithm is considered. For denoising, certain wavelet packet coefficients (frequency) are set to zero and the others are thresholded. We make a comparation of wavelet-packet coefficients algorithm and amended wavelet-packet frequency algorithm in the application of speech denoising. The amended wavelet-packet frequency algorithm is proposed and implemented that can further improve the performance of the denoising system. © 2011 IEEE.

Yang H.,Chaohu University
Advanced Materials Research | Year: 2013

In power quality monitoring system, there are unavoidably existing various kinds of noises in collected data, presence of noise may result in increased false classification rate, denoising is an extremely important work for detection and classification of power quality disturbances. In order to improve the denoising result of power quality signal, an denoising method for power quality signal using Savitzky-Golay is proposed. Numerical results show that the proposed method can eliminate the influence of noise components and implement transient power quality disturbance detection and localization, thus providing good foundations for transient power quality disturbance monitoring under noise environment. © (2013) Trans Tech Publications, Switzerland.

Xu M.K.,Chaohu University
Applied Mechanics and Materials | Year: 2013

Using AMPS-1D program package, graded band-gap PIN nc-Si Thin-film Solar Cells is simulated. The results show that the graded band gap of intrinsic layer not only enhances the absorption of sunlight but also promote the collection of the photo-generated carriers. The increasing graded band gap PIN nc-Si thin-film solar cells with high efficiency of 14.743% and fill factor of 0.775 is superior to general solar cells designed in our previous work. © (2013) Trans Tech Publications, Switzerland.

Wang Y.-Q.,Chaohu University
Key Engineering Materials | Year: 2015

In order to improve the control characteristicsof single inverted pendulum system, the system's mathematical model is established, the immune control algorithm is proposed, designing immune PID controller, optimizing optimal index and PID parameters, and using this method in single inverted pendulum system. Compared with adaptive fuzzy control results, immune control method to the maximum peak value of pendulum deviation angle and cart displacement are reduced separately 0.0829rad and 0.2796m, stabilization time are reduced separately 0.2946s and 0.7324s.The simulation result has indicated that the single inverted pendulum system's dynamic characteristic has improved effectively which based on immune algorithm, sharpened the system's anti-interference ability as well as parameter time-variance robustness. © (2015) Trans Tech Publications, Switzerland.

Xu M.K.,Chaohu University
Advanced Materials Research | Year: 2013

P+a-SiC/ I nc-Si/N+a-Si structure solar cells is simulated by AMPS-1D program package to characterize the new thin film solar cell. In order to analyze the characteristics of the device, the thickness of layer are considered. The results show that the thickness of layer and the value of layer have a great effect on the conversion efficiency. Our results suggest a high performance P a-SiC/ I nc-Si/N a-Si structure solar cells with high efficiency of 14.411% and fill factor of 0.738. The simulation result is potentially valuable in exploring gradual bandgap P+a-SiC/I nc-Si/N+a-Si structure solar cells with high performance. © (2013) Trans Tech Publications, Switzerland.

Zheng L.,Nanjing University of Science and Technology | Zheng S.,Zhejiang University of Finance and Economics | Zhai Q.,Chaohu University
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2015

In this paper a lattice Boltzmann equation (LBE) method is designed that is different from the previous LBE for the Cahn-Hilliard equation (CHE). The starting point of the present CHE LBE model is from the kinetic theory and the work of Lee and Liu [T. Lee and L. Liu, J. Comput. Phys. 229, 8045 (2010)JCTPAH0021-999110.1016/]; however, because the CHE does not conserve the mass locally, a modified equilibrium density distribution function is introduced to treat the diffusion term in the CHE. Numerical simulations including layered Poiseuille flow, static droplet, and Rayleigh-Taylor instability have been conducted to validate the model. The results show that the predictions of the present LBE agree well with the analytical solution and other numerical results. © 2015 American Physical Society.

Liu X.G.,Chaohu University
Applied Mechanics and Materials | Year: 2013

The paper researches the parametric inversion of the two-dimensional convection-diffusion equation by means of best perturbation method, draw a Numerical Solution for such inverse problem. It is shown by numerical simulations that the method is feasible and effective. © (2013) Trans Tech Publications, Switzerland.

Songlin M.,Chaohu University
Applied Mathematics and Information Sciences | Year: 2013

In the paper, we get the precise results of Hájek-Rényi type inequalities for the partial sums of negatively orthant dependent sequences, which improve the results of Theorem 3.1 and Corollary 3.2 in Kim (2006). In addition, the Marcinkiewicz type strong law of large numbers is obtained. At last, the strong stability for weighted sums of negatively orthant dependent sequences is discussed. ©2013 NSP Natural Sciences Publishing Cor.

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