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Yue H.,Xuchang University
Journal of Chemical and Pharmaceutical Research | Year: 2014

This paper according to volleyball pass success rate affected experimental data, firstly establishes statistics model to research on present influence factors, finds out key factors, and by statistics of volleyball favorable and unfavorable audience and investigating on them, finds out main factors that restrict volleyball development. Then through analytic hierarchy process, analyze affect volleyball pass technique four main elements that are finger flexibility and wrist elastic force, pass teaching method, objective setting, volleyball types, finds out that affect volleyball pass hit rate uppermost factors, and make corresponding suggestions on improving volleyball pass technique.

Wang Z.,Xuchang University
Journal of Chemical and Pharmaceutical Research | Year: 2014

By collecting and sorting of cross-disciplines information, make multiple disciplines documents summarize of sports physiology, sports anatomic, sports training, sports psychology, and converge with this paper rhythmic gymnastics research related other fields, such as basketball, football, gymnastics, dance and so on. Apply document literature method card effects of proprioception play in rhythmic gymnastics items; carry out combined and comprehensive statements on definite dimensions functions such as selection, training, injury prevention and rehabilitation and so on. Research shows that proprioception can culture, consolidate and develop rhythmic gymnastics skills; on the other hand, sports skills can also promote proprioceptors function to get further improved and developed, therefore their positive interaction let muscle motions analysis ability as well as motions time judge accuracy get fast improvement, which are proprioception proactive effects on sports.

Yan J.,Xuchang University
Journal of Chemical and Pharmaceutical Research | Year: 2014

Middle spatial resolution multi-spectral remote sensing image is a kind of color image with low contrast, fuzzy boundaries and informative features. In view of these features, the fuzzy C-means clustering algorithm is an ideal choice for image segmentation. However, fuzzy C-means clustering algorithm requires a pre-specified number of clusters and costs large computation time, which is easy to fall into local optimal solution. In order to overcome these shortcomings, ant colony algorithm is employed to optimize fuzzy C-means algorithm in remote sensing image segmentation. First, the centers and number of clusters is determined by ant colony optimization algorithm. Then the initialization fuzzy C-means algorithm is used for remote sensing image classification. Experimental results show that the ant colony optimization is an effective method to solve the problem of fuzzy C-means algorithm in remote sensing image segmentation and the visual interpretation of segmentation is much improved by proposed ant colony optimized C-means clustering. © 2014, Journal of Chemical and Pharmaceutical Research. All rights reserved.

Zhang Y.,Xuchang University
Journal of Luminescence | Year: 2017

NiO film is fabricated by a ‘combustion process’ driven by ‘chemical oven’ using glycine as ‘fuel’ on quartz and indium tin oxide (ITO) substrates followed by an annealing process in air at 220 °C for 30 min. The NiO coating, as a hole injection layer (HIL) is analyzed by ways of X-ray diffraction (XRD), atomic force microscope (AFM), and UV–visible spectrometer. The NiO-based QLEDs shows a maximum luminance of 33852 cd m−2, current efficiency (CE) of 4.56 cd A−1 and lifetime of 2711 h. The combustion fabricated NiO film may provide an effective way to fabricate other NiO-based optoelectrical devices at relative low temperature. © 2017

Liu R.,California Institute of Technology | Zheng Z.,Energy Micro | Zheng Z.,Xuchang University | Spurgeon J.,California Institute of Technology | And 2 more authors.
Energy and Environmental Science | Year: 2014

An important approach for solving the world's sustainable energy challenges is the conversion of solar energy to chemical fuels. Semiconductors can be used to convert/store solar energy to chemical bonds in an energy-dense fuel. Photoelectrochemical (PEC) water-splitting cells, with semiconductor electrodes, use sunlight and water to generate hydrogen. Herein, recent studies on improving the efficiency of semiconductor-based solar water-splitting devices by the introduction of surface passivation layers are reviewed. We show that passivation layers have been used as an effective strategy to improve the charge-separation and transfer processes across semiconductor-liquid interfaces, and thereby increase overall solar energy conversion efficiencies. We also summarize the demonstrated passivation effects brought by these thin layers, which include reducing charge recombination at surface states, increasing the reaction kinetics, and protecting the semiconductor from chemical corrosion. These benefits of passivation layers play a crucial role in achieving highly efficient water-splitting devices in the near future. This journal is © the Partner Organisations 2014.

Feng Z.-B.,Xuchang University | Feng Z.-B.,CAS Wuhan Institute of Physics and Mathematics
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2015

We propose a potentially practical scheme for quantum state transfer between a Cooper-pair box circuit and an electron spin ensemble of diamond nitrogen-vacancy (NV) centers. Both subsystems are placed into a common circuit QED and can be modeled as effective three-level subsystems under the appropriate external biases. Due to significant suppression of the photon decay, the robust state transfer between the two subsystems can be accomplished by using the technique of stimulated Raman adiabatic passage by individual microwave pulses, where a superconducting coplanar resonator serves as the quantum data bus. Numerical simulations show that the present scheme could offer a viable route towards robust quantum state transfer in hybrid solid-state systems. © 2015 American Physical Society.

We have developed hexadecyl trimethyl ammonium bromide (CTAB) functionalized graphene oxide (GO)/multiwalled carbon nanotubes (MWNTs) modified glassy carbon electrode (CTAB-GO/MWNT) as a novel system for the simultaneous determination of dopamine (DA), ascorbic acid (AA), uric acid (UA) and nitrite (NO2 -). The combination of graphene oxide and MWNTs endow the biosensor with large surface area, good biological compatibility, electricity and stability, high selectivity and sensitivity. In the fourfold co-existence system, the linear calibration plots for AA, DA, UA and NO2 - were obtained over the range of 5.0-300μM, 5.0-500μM, 3.0-60μM and 5.0-800μM with detection limits of 1.0μM, 1.5μM, 1.0μM and 1.5μM, respectively. In addition, the modified biosensor was applied to the determination of AA, DA, UA and NO2 - in urine samples by using standard adding method with satisfactory results. © 2014 Elsevier B.V.

Feng Z.-B.,Xuchang University
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2012

In this Brief Report, we propose a theoretical scheme to transfer quantum states between superconducting charge qubits and semiconductor spin qubits in a circuit QED device. Under dispersive conditions, resonator-assisted state transfer between qubits can be performed controllably only by addressing the flux bias applied to the charge qubits. The low infidelity and existing advantages show that the proposal may provide an effective route toward scalable quantum-information transfer with solid-state hybrid qubits. © 2012 American Physical Society.

Zhang Y.,Xuchang University
Applied Surface Science | Year: 2015

In this work, NiO coating was fabricated by magnetron sputtering method on quartz and indium tin oxide (ITO) substrates in an inert gas ambient of Ar followed by a thermal oxidation process in air at 400 °C for 2 h. The NiO coating was analyzed by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscope (AFM), and UV-vis spectrometer. A preliminary photovoltaic performance measurement of the as-prepared device (ITO/NiO/poly-TPD/PC71BM/Al) shows a short circuit current density (Jsc) of 5.6 mA cm-2 and power conversion efficiency (PCE) of 1.5% under an illumination of 100 mW cm-2. The PCE of device with NiO HTLs was ca. 20% higher than those of the devices based on PEDOT:PSS hole transport layers (HTLs). The thermal oxidation fabricated NiO coating may provide an excellent route to fabricate other NiO-based optoelectronic devices. © 2015 Elsevier B.V. All rights reserved.

Zhang Y.,Xuchang University
Physica E: Low-Dimensional Systems and Nanostructures | Year: 2015

(Figure Presented) In this work, NiO nanowires have been synthesized by a hydrothermal reaction of NiCl2 with Na2C2O4 in the presence of ethylene glycol at 180°C for 12 h, then calcinated at 400°C for 2 h. The NiO nanowires were analyzed by means of scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The resulting current-voltage (I-V) characteristics of the NiO nanowires exhibited a clear rectifying behavior. This rectify behavior was attributed to the formation of a Schottky contact between Au coated atomic force microscopy (AFM) tip and NiO nanowires (nano-M/SC) which was dominated by the surface states in NiO itself. Photo-assisted conductive AFM (PC-AFM) was used to demonstrate how the I-V characteristics are influenced by the surface states. Our I-V results also showed that the nano-M/SCs had a good photoelectric switching effect at reverse bias. © 2015 Elsevier B.V. All rights reserved.

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