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Hengshui, China

Hengshui University is a university in Hengshui, Hebei province, People's Republic of China, established by the provincial government. Wikipedia.

In the title complex, {(C2H8N)[Cu(C8H4O4)(C8H6N3)]} n , there are two CuII cations (each located on a centre of inversion), one benzene-1,2-dicarboxylate dianion, one 3-(pyridin-4-yl)-1H-pyrazol-1-ide anion and one dimethylammonium cation in the asymmetric unit. The dimethylammonium cation was highly disordered and was treated with the SQUEEZE routine in PLATON [Spek (2009). Acta Cryst. D65, 148-155]; the crystallographic data takes into account the presence of the cation. Each CuII cation exhibits a square-planar coordination geometry. A benzene-1,2-dicarboxylate dianion bridges two CuII cations, building a linear chain along [001]. The chains are connected by 3-(pyridin-4-yl)-1H-pyrazol-1-ide anions, constructing a layer parallel to (101). The layers are assembled into a three-dimensional supramolecular network through C - H...π interactions. Source

Liu S.,Hengshui University
International Journal of Security and its Applications

The development of network technology has brought convenience to people's life, but also provides the convenience for the virus, Trojan and other destructive programs to attack the network. Then, the computer network security is becoming more and more dangerous. Accurately and scientifically predict the risk of network, it can effectively prevent the risk, and reduce the loss caused by the problem of computer network security. Computer network security is an early warning problem of multi index system. So, the traditional linear forecasting method cannot accurately describe the impact of each index on the evaluation results, and the accuracy of the prediction results is low. In order to improve the prediction accuracy of computer network security, this paper presents a new forecasting method for computer network security. Firstly, the evaluation index of computer network security is selected by expert system, and the weight of evaluation index is determined by the expert scoring method. Secondly, we put the index weight into the BP neural network, and use the BP neural network to learn it. Then, the parameters of BP neural network are optimized by the improved particle swarm optimization algorithm. After that, this paper uses a method based on the Fibonacci method principle to find the number of hidden layer node which has the best fitting ability. Finally, we use this algorithm to predict the network security of a certain enterprise in the next six months. The score is 0.67, 0.84, 0.72, 0.87, 0.86 and 0.91, which is close to the actual value of network security. © 2016 SERSC. Source

Cui H.-F.,Hengshui University
Advanced Materials Research

On the basis of the conjugate gradient method CD, the artile builds a new two-parameter P-NCD projected conjugate gradient method, the article gives two-parameter P-NCD Conjugate Gradient Method drop projection and on the strong Wolfe line search in the principles of the convergence criteria, the new algorithm is applied to estimate the equation with linear constraints in the model instantiated test,the results shows good results. © (2014) Trans Tech Publications, Switzerland. Source

Zhang J.,Hengshui University
Rengong Jingti Xuebao/Journal of Synthetic Crystals

Polyacrylonitrile were synthesized by precipitation method, and the PAN/TiO2 nanocomposites were prepared by chemisorption method. The structure and properties of the obtained composite particles were characterized by transmission spectrum(TEM), X-ray diffraction (XRD), infrared spectrum (IR), X-ray photoelectron spectroscopic analysis (XPS), UV-vis-diffuse reflectance spectroscope (DRS)and so on. The results show that the morphology, the crystal phase and the particle size of PAN/TiO2 don't change comparing TiO2. The absorption of PAN/TiO2 nanocomposites increase in the visible region compared to pure TiO2. Through the experimental results of the degradation of methyl orange, the photocatalytic activity of obtained samples is high and the degradation rate of methyl orange can achieve 86.5% within 14 h. ©, 2014, Chinese Ceramic Society. All right reserved. Source

Sun J.,Hengshui University
Lecture Notes in Electrical Engineering

The D3520 resin was suited for adsorption and desorption of fusel oil by the comparison study of different types of resin. The study confirmed that macroporous resin D3520 had favorable adsorption and desorption capability by comparing different resins based on adsorption quantity, adsorption rate, and desorption rate. Temperature affected the fusel oil adsorption rate of D3520 and with more impact the temperature was high. There was little difference in the adsorption rate at 25 and 30 °C and the rate was up to 58.85%. Among all strippant, the effect of acetone was higher than all concentration ethyl alcohol, up to 65.80%. After treatment by D3520, there was little difference in physical, chemical, and sensory indexes of Luzhou flavor liquor and was not a bad influence on Luzhou flavour liquor. The Luzhou flavor liquor was soft and well balanced, with more rich ester aroma, and the wine quality was better by the D3520 resin treatment. © Springer-Verlag Berlin Heidelberg 2015. Source

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