Time filter

Source Type

Wang F.,Gansu Institute of Political Science and Law
Applied Mechanics and Materials | Year: 2014

Vehicle scheduling problem (VSP) is a kind of NP combination problem. In order to overcome PSO's slow astringe and premature convergence, an improved particle swarm optimization (IPSO) is put forward. In the algorithm, it uses the population entropy to makes a quantitative description about the diversity of the population, and adaptively adjusts the cellular structure according to the change of population entropy to have an effective balance between the local exploitation and the global exploration, thus enhance the performance of the algorithm. In the paper, the algorithm was applied to solve VSP, the mathematical model was established and the detailed implementation process of the algorithm was introduced. The simulation results show that the algorithm has better optimization capability than PSO. © (2014) Trans Tech Publications, Switzerland. Source

Wang Q.Y.,Gansu Institute of Political Science and Law
Advanced Materials Research | Year: 2014

According to the image formation model and the nature of underwater images, we find that the effect of the haze and the color distortion seriously pollute the underwater image data, lowing the quality of the underwater images in the visibility and the quality of the data. Hence, aiming to reduce the noise and the haze effect existing in the underwater image and compensate the color distortion, the dark channel prior model is used to enhance the underwater image. We compare the dark channel prior model based image enhancement method to the contrast stretching based method for image enhancement. The experimental results proved that the dark channel prior model has good ability for processing the underwater images. The super performance of the proposed method is demonstrated as well. © (2014) Trans Tech Publications, Switzerland. Source

Duan M.-C.,Gansu Institute of Political Science and Law
Natural Gas Geoscience | Year: 2014

China has maintained rapid growth trend in the economic aggregate since 1957, especially the beginning of reform and opening up. China has become the world's second largest economy in 2010. The rapid economic development has led to changes in demand for energy consumption and energy consumption structure. These changes affect the sustainable development of China's economy and society. This paper systematically studied the characteristics of China's total energy and oil and natural gas energy consumption since 1957. The variation of total energy and oil and natural gas energy consumption with time, the energy consumption composition and structure, energy dependence on foreign were elucidated, and the energy import proportion, species and areas were analyzed. The relationship between national economic growth and energy consumption was discussed. This has significance in grasping the trend of China's energy consumption, adjusting the economic development mode and energy consumption structure and making the economic sustainable development strategy. 16721926 ©, 2014, Science Press. All right reserved. Source

Sun J.,Northwest Normal University | Li C.-Y.,Gansu Institute of Political Science and Law | Yu S.-Y.,Northwest Normal University | Wang J.-J.,Northwest Normal University
Acta Anatomica Sinica | Year: 2012

Objective: To investigate changes of structures, expression of Bax protein activities of superoxide dismutase(SOD) and catalase(CAT), and contents of maleic dialdehyde(MDA) in the liver of filial mice and activity of glutamic-oxalacetic transaminease (GOT) and glutamic-pyruvic transaminase (GPT) in serum after injected ephedrine. Methods: Totally 48 filial mice were used in this study. They were intraperitoneally injected with escalation doses (2.0g/L, 3.0g/L and 4.0g/L) ephedrine and the same amount of saline. Changes of the liver weight were examined. Activities of SOD, CAT, GOT, GPT as well as content of MDA were determined by colorimetry. Hepatic structures of 5, 10 and 15 days filial mice were observed by optical microscopy after injected ephedrine and the expression of Bax protein was measured by immunohistochemical staining. Results: The liver weight of filial mice of the experimental groups was lower than the control groups at day 5 10 and 15 after injected ephedrine. The activity of SOD and CAT increased in the early ages and, then decreased with the extension of time and the increasing doses of the drug, SOD and CAT activities of the experimental groups were higher at day 5 (P < 0.05) and lower at day 10 (P < 0.05) and day 15 (P < 0.01) than that of the control group. While MDA content decreased firstly and then increased, MDA content of the experimental group lower than the control group at day 5 (P < 0.05), and higher than the control group at day 10 and 15 (P < 0.01). The activity of GOT and GPT in filial mice serum of the experimental groups were higher than the control groups after injection of ephedrine(P < 0.05 or P < 0.01). Liver of filial mice appeared various degrees of damage after ephedrine injection, such as hepatic plate atrophy, hepatic sinusoid expand, the cell boundaries fuzzy and endotheliocyte fall off. The intensity of the expression of Bax protein of the experimental groups was higher than the control group after ephedrine injection(P < 0.05 or P < 0.01). Conclusion: The ephedrine affects the liver of developmental filial mice. This damage may be correlated with the low activities of SOD, CAT and high content of MDA in the filial mice. Source

Pesticides and antidepressants are frequently misused in drug-facilitated crime because of their toxicological effect and easy-availability. Therefore, it is essential for the development of a simple and reliable method for the determination of these organic toxicants in biological fluids. Here, we report on an applicable method by the combination of optimized liquid-liquid extraction (LLE) procedure and high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) to identify and quantify dimethoate, omethoate, dichlorvos, carbofuran, fenpropathrin, diazepam, estazolam, alprazolam, triazolamm, chlorpromazine, phenergan, barbitone and phenobarbital in human blood. The method demonstrated a linear calibration curve in range of 20-500 μg/L (r > 0.994). The accuracy evaluated by recovery spiked at three different concentrations (50, 100 and 200 μg/L) was in the range of 58.8-83.1% with a relative standard deviations (RSD) of 3.7-7.4%. The limits of quantification ranged over 6.7-33.3 μg/L. This method was proved to be simple and reliable, and was thus successfully applied to forensic toxicology. 2016. © The Japan Society for Analytical Chemistry. Source

Discover hidden collaborations