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In-doped ZnO (IZO) nanowires were grown using the chemical vapour deposition method. The IZO nanowires have been characterized by scanning electronic microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) and UV–Visible spectroscopy. The PL results demonstrated a larger...
We present the structural and nonlinear optical behavior of Ag-doped ZnO (AZO) films prepared by magnetron sputtering. The structural of AZO films are systematically investigated by X-ray diffraction (XRD) and scanning electronic microscopy (SEM), respectively. The results show that AZO films can still retain a wurtzite structure, although the c-axis as preferred orientation is decreased by Ag doping...
With the pace of urbanization continues to accelerate, making underground construction area is growing. More and more large underground public buildings are located in the ground, such as shopping malls, subways and so on. The fire evacuation in a large underground building has more difficulty than on the ground. In order to gain more time for evacuation, smoke design of large underground public buildings...
High precision positioning stage has played increasingly important role in the areas of aeronautics and astronautics, ultra-precision manufacturing and measuring, microelectronics, biological engineering, optical engineering, etc. In this paper, a piezo-powered 2D micro-positioning stage based on parallel sheet plate flexible beams is designed. A lever amplifier structure connected by circular arc...
By analyzing the many problems of today's online courses, this paper introduces the concept and meaning of PBL (project management) online courses, the constitution of PBL and the characteristics of online courses. By making analysis of these concepts in simple terms, we conclude the methods and principles of online course teaching based on PBL study and make practical demonstration by applying the...
In this paper, ridge regression (RR) method is adopted for predicting the formation of microporous aluminophosphate AlPO4-5 based on a database of AlPO synthesis, which aims to provide a useful guidance to the rational synthesis of microporous materials as well as other inorganic crystalline materials. To solve the problem of class imbalance, four guided resampling methods proposed in our previous...
In order to improve the recall ratio and precision ratio in knowledge retrieval of the product-design process, a semantic-oriented framework of product-design knowledge retrieval is presented. In this framework, the rule model is established to improve the ability of intelligent inference and solve the problem of polysemy. Then ontology model is established to improve the ability of semantic extension...
In order to solve facility layout problem from quantitative and qualitative perspectives, a layout approach based on simulation optimization and virtual reality (VR) is proposed. Firstly, the layout is optimized from the quantitative perspective through the iteration of simulation model and optimization algorithm. Then the optimized results are transferred into a VR system, in which designers are...
To tackle the problems associated with the field management of furniture production, a furniture production line simulation model was constructed. This model was implemented by employing United Model Language (UML) as the modeling tool and object-oriented software, EM-Plant, as the development platform. The simulation results were analyzed on the basis of the average processing time, machine utilization...
This paper investigates the impact of increasing auditor legal liability and differential client risk on audit pricing in China. We find that all auditors have systematically increased their audit fees since 2002. The fee spread between Top8 and non-Top8 auditors also increases significantly.
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