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Liu A.,Leshan Vocational and Technical College
Proceedings - 2016 International Conference on Smart City and Systems Engineering, ICSCSE 2016 | Year: 2016

This paper based on application analysis of Multi-objective programing in the Course teaching of differential equations, establish a course teaching differential equations based on a target in the planned research system through the application of multi-objective programming approach. To achieve the research purposes of improving the teaching quality of Course teaching of Differential equation, to provide reference and guidance for Course teaching of Differential equation. © 2016 IEEE.

Wang W.,Leshan Vocational and Technical College
Proceedings - 9th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2017 | Year: 2017

With the rapid development of technology, the application of network technology in education has become more and more extensive. Especially the Mu class as a kind of extensive network learning mode has the excellent character, and makes the Mu class get fast development. In this paper, the main factors based on the factor analysis of the impact of Higher Vocational College English teaching forms the research model. Firstly, the correlation analysis was carried out on all the influencing factors with the gray correlation degree, and got the influencing factors of the correlation degree among the main factors were obtained. The final purpose was to get the final weighted score of each influence factor. The influence of different factors on the teaching of English Mu class in higher vocational colleges can be realized by quantitative analysis, which provides a scientific reference for the development of Higher Vocational English Teaching in the future. © 2017 IEEE.

Chen A.,Beihang University | Chen A.,Leshan Vocational and Technical College | Zhu K.,Beihang University
Solar Energy | Year: 2012

The p-type a-Si:H/n-type c-Si (P + a-Si:H/N + c-Si) heterojunction was simulated for developing solar cells with high conversion efficiency and low cost. The characteristic of such cells with different work function of transparent conductive oxide (TCO) were calculated. The energy band structure, quantum efficiency and electric field are analyzed in detail to understand the mechanism of the heterojunction cell. Our results show that the a-Si/c-Si heterojunction is hypersensitive to the TCO work function, and the TCO work function should be large enough in order to achieve high conversion efficiency of P + a-Si:H/N + c-Si solar cells. With the optimized parameters set, the P + a-Si:H/N + c-Si solar cell reaches a high efficiency (η) up to 21.849% (FF: 0.866, V OC: 0.861V, J SC: 29.32mA/cm 2). © 2011 Elsevier Ltd.

Wang S.,Wuhan University | Qi Z.,Wuhan University | Huang H.,Leshan Vocational and Technical College | Ding H.,Wuhan University
Analytical Letters | Year: 2012

Methotrexate is widely used for treatment of various neoplastic diseases. The present work details the voltammetric analysis of Methotrexate at a multi-walled carbon nanotube (MWNT) modified screen-printed electrode (SPE). The fabrication and evaluation of MWNT-derived screen-printed electrochemical sensors based on a MWNT ink are reported. The fabricated MWNT strips combine the attractive advantages of CNT materials and disposable screen printed electrodes. The anodic voltammetric behavior of methotrexate was studied using cyclic and square-wave voltammetric techniques in tris-HCl (pH = 7.5) solution. The oxidation of methotrexate was an irreversible adsorptive-driven process. The experimental conditions such as carbon ink, MWNT, pH, the concentration, and nature of buffer were investigated to optimize the determination of methotrexate. Under optimum conditions, the square-wave voltammetric peak currents were in a linear relationship to methotrexate concentrations in the range of 5.0 × 10-7M-1.0 × 10-4 M with a detection limit of 1.0 × 10-7 M. The MWNT/SPE showed good stability, selectivity, and was successfully used to quantify methotrexate in pharmaceutical formulations. © 2012 Copyright Taylor and Francis Group, LLC.

Ye C.A.,Leshan Vocational and Technical College | Zhang X.F.,Chengdu Land Reserve Center
Advanced Materials Research | Year: 2014

Polycrystalline silicon-photovoltaic industry belongs to high-and-new technology industry, but it produces massive by-products (silicon tetrachloride and so on), even partial chloro-silicane and hydrogen chloride exude into the exhaust in its production process. As a consequence, it not only increases the exhaust processing cost in the polycrystalline silicon-photovoltaic industry, but also increases pollutant discharge of the enterprise. At present, Chinese polycrystalline silicon-photovoltaic enterprises cannot solve technical difficult problems in large-scale production due to lack of coordination of chemical industry. Moreover, polycrystalline silicon has high request of purity that needs quite advanced technology to achieve. This article introduces influences upon production cost and energy consumption with the use of improved Siemens method, and proposes that polytrophic-photovoltaic industry needs to be systematized, normalized and standardized for its healthy development. © (2014) Trans Tech Publications, Switzerland.

Zhang Z.,University of Sichuan | Yi X.,Leshan Vocational and Technical College | Peng H.,Xihua University
Bio-Medical Materials and Engineering | Year: 2014

This paper proposes a tissue membrane system-based framework to deal with the optimal image fusion problem. A spatial domain fusion algorithm is given, and a tissue membrane system of multiple cells is used as its computing framework. Based on the multicellular structure and inherent communication mechanism of the tissue membrane system, an improved velocity-position model is developed. The performance of the fusion framework is studied with comparison of several traditional fusion methods as well as genetic algorithm (GA)-based and differential evolution (DE)-based spatial domain fusion methods. Experimental results show that the proposed fusion framework is superior or comparable to the other methods and can be efficiently used for image fusion. © 2014 - IOS Press and the authors.

Chen A.Q.,Leshan Vocational and Technical College | Shao Q.Y.,South China Normal University
Science China: Physics, Mechanics and Astronomy | Year: 2011

The P + α-Si /N + polycrystalline solar cell is molded using the AMPS-1D device simulator to explore the new high efficiency thin film poly-silicon solar cell. In order to analyze the characteristics of this device and the thickness of N + poly-silicon, we consider the impurity concentration in the N + poly-silicon layer and the work function of transparent conductive oxide (TCO) in front contact in the calculation. The thickness of N + poly-silicon has little impact on the device when the thickness varies from 20 μm to 300 μm. The effects of impurity concentration in polycrystalline are analyzed. The conclusion is drawn that the open-circuit voltage (V oc) of P + α-Si /N + polycrystalline solar cell is very high, reaching 752 mV, and the conversion efficiency reaches 9.44%. Therefore, based on the above optimum parameters the study on the device formed by P + α-Si/N + poly-silicon is significant in exploring the high efficiency poly-silicon solar cell. © Science China Press and Springer-Verlag Berlin Heidelberg 2011.

Zhao Y.L.,Leshan Vocational and Technical College
Applied Mechanics and Materials | Year: 2013

The Internet of Things is currently the most popular field of communication and information research directions. Their application in the amount of information involved, are extremely large amount of data. How to ensure the transmission efficiency of business information under the premise of improving networking applications data security to protect the user's privacy data will be particularly important. Paper uses a custom data packet encapsulation mechanism, reducing the overhead of data resources; another based on their cross-platform communication features, combined with secure encryption and decryption, signature and authentication algorithm, the establishment of a secure communication system of things model for the differentiation of things communications environment, providing a standard packet structure, namely smart business security IOT application Protocol intelligent Service Security Application Protocol(ISSAP. © (2013) Trans Tech Publications, Switzerland.

Wang X.E.,Leshan Vocational and Technical College | Chen Z.Y.,Leshan Vocational and Technical College
Advanced Materials Research | Year: 2014

Isolation Control System Based on MRF magneto-rheological dampers analyze the structure and mechanical properties for engine isolation, the establishment of magnetorheological damper damping force of the theoretical model to clarify the magnetic current variable damper structural parameters, the motion parameters change its relationship performance impact of electromagnetic fields on the magneto-rheological dampers for numerical calculations. Research magnetorheological engine mounts intelligent control, real-time damping force adjustment, so that the vibration of the engine is transmitted to support the most effective attenuation of the time. © (2014) Trans Tech Publications, Switzerland.

Zhao Y.L.,Leshan Vocational and Technical College
Applied Mechanics and Materials | Year: 2014

This paper first discusses the basic principles of binocular stereo vision inspection, followed by discussion of the three-dimensional mathematical model of binocular vision sensor measurements, non-contact measurement accuracy binocular stereo vision again spring geometric parameters were analyzed, and then double-structure stereo vision sensor configurations were analyzed for binocular stereo vision to do a simple discussion of the basis for discussion. © (2014) Trans Tech Publications, Switzerland.

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