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Fang Y.-t.,Zhenjiang Watercraft College | Liang Z.-c.,Nanjing University of Posts and Telecommunications
Optics Communications | Year: 2010

Basing on the condition that the incident angle is larger than the total internal reflection angle, we present a systematic study of transmission properties of one-dimensional photonic crystal with all dielectric materials by the transfer matrix method and the Bloch's theorem. Due to the existence of the evanescent field within the structure, the transmission bands consist of some discrete symmetry peaks. For light with these peak frequencies, the structure is either transparent or opaque depending on the number of the structure periods. The unusual transmission properties are attributed to the field distribution and Bloch wave vector. © 2010 Elsevier B.V. All rights reserved.

Yu G.,Nanjing Forestry University | Fang Y.-T.,Zhenjiang Watercraft College
Optics and Laser Technology | Year: 2011

The transmission spectra of two-period metal-dielectric structure are studied through the transfer matrix method. When the dielectric is nonlinear material, an optical bistability has been found. The upper threshold value is insensitive to incident frequency, while the lower threshold value increases with the incident frequency decreasing. The effect of loss from the metal layers on the optical bistability is also considered. © 2010 Elsevier Ltd. All rights reserved.

Xia B.,Shanghai JiaoTong University | Xia B.,Zhenjiang Watercraft College | Wu L.-S.,Shanghai JiaoTong University | Mao J.,Shanghai JiaoTong University
IEEE Transactions on Microwave Theory and Techniques | Year: 2012

In this paper, a new balanced-to-balanced power divider/combiner is proposed. By using matrix transformation, two three-port networks for the odd-and even-mode circuit models are deduced, based on the constraint rules of the mixed-mode S-parameters. In order to satisfy the two required scattering matrices simultaneously, the resistances of lumped elements, the characteristic impedances and electrical length of transmission lines are selected appropriately. Then, a planar microstrip structure is designed to realize the proposed balanced-to-balanced power divider/combiner with equal power division. The theoretical, simulated and measured results all show a good mixed-mode performance. In the measurement, the maximum differential-mode transmission coefficient is-3.2 dB, the best differential-mode isolation is 47.2 dB, and the fractional bandwidth of its operating band is approximately 20.8%. © 1963-2012 IEEE.

Xia B.,Shanghai JiaoTong University | Wu L.-S.,Zhenjiang Watercraft College | Mao J.,Shanghai JiaoTong University
IEEE Transactions on Microwave Theory and Techniques | Year: 2013

The authors of the original above-named article [ibid., vol. 60, no. 9, pp. 2791¿2798, Sep. 2012] appreciate the comments by M.-J. Park [ibid., vol. 61, 2013]. The authors agree that their proposed balanced-to-balanced power divider/combiner structure can be simplified into the form proposed in the comments of Park when only the circuit performance at the central frequency is considered. The main reason is that the half-wavelength transmission line can be regarded as an ideal phase inverter with special properties, including those described by Park [see (1)¿(4)]. However, the two structures have different characteristics at other frequencies, and it should also be pointed out that the curves in Park's Fig. 3 cannot completely describe the frequency responses of the structure since it is not symmetric to its middle plane any more. From a theoretical analysis and simulations presented, it can be concluded that the balanced-to-balanced power dividers originally presented by Park and the authors and this letter are equivalent to each other at the central frequency due to the special properties of ideal phase inverters, and all of them can be converted from a two-way single-ended Wilkinson power divider. The authors' proposed power divider had four resistors and a symmetric configuration, which provides two differential-mode outputs with the same magnitude and the best bandwidth. The power dividers proposed by Park and this letter have fewer resistors, but their two outputs are not symmetric and the operating bands are also narrowed. Therefore, if symmetric performances and relatively large bandwidth are prior in design, the originally proposed four-resistor structure is preferred. When compact size and few resistors are desired, the type C one-resistor structure, given in Fig. 1(d) of this reply, is more suitable. © 1963-2012 IEEE.

Wang S.B.,Zhenjiang Watercraft College
Applied Mechanics and Materials | Year: 2013

Command ships driving simulation system based on existing virtual reality technology teaching conditions, mentioned about teachers, students, simulation system for the characteristics of ship driving command interactive teaching mode, built a simulation system, Simulation, computer network and multimedia technology etc as the foundation, connected to the innovative teaching mode of teaching and learning. © (2013) Trans Tech Publications, Switzerland.

Guan H.L.,Zhenjiang Watercraft College
Advanced Materials Research | Year: 2013

Treatment of two-dimensional and three-dimensional electrode method was researched and compared respectively using aluminum electrodes. The influences of voltage, electrolysis time, pH and electrode distance on the result were also discussed. It was found that the degradation rate of wastewater with three-dimensional electrode method was much better than two-dimensional method. For the treatment of vehicle-washing wastewater, the best of voltage was 20V, the electrolysis time was 30 min, and the electrode distance was 2cm. © (2013) Trans Tech Publications, Switzerland.

Guan H.L.,Zhenjiang Watercraft College
Water Resources and Environment - Proceedings of the International Conference on Water Resources and Environment, WRE 2015 | Year: 2016

The vehicle-washingwastewaterwas analyzed as the research object, by using ordinary aluminum materials as anodic and cathodic electrodes, saturated actived carbon as filler materials, passing into the air from bottom to form three-dimensional electrode fluidized bed reactor. The operational parameters including cell voltage, electrode distance, airflow, electrolytic time, quantity of activated carbon etc were discussed on the removal rate of COD. The results showed that when the cell voltage was 30V, the electrode distance was 3 cm, the airflow was 3 L/min, the electrolytic time was 30 min, the activated carbon dose was 60 g, the removal rate of COD was the highest. At the same time, it is found that the treatment of vehicle-washing wastewater by three-dimensional fluidized bed electrode method was better than three-dimensional fixed bed electrode method and two-dimensional plate electrode method. © 2016 Taylor & Francis Group, London.

Fang Y.-T.,Zhenjiang Watercraft College
Optics and Laser Technology | Year: 2010

The transmission properties of a two-period structure consisting of dielectric layers and air layers are studied by numeric methods. On the condition of total reflection from dielectric to air layer, the coupling of the evanescent waves in air layers and propagation waves in dielectric layers forms some special transmission bands. Given proper structure parameters, one incident direction only allows one transmission frequency; on the other hand, one transmission frequency only allows one incident direction. This structure can simultaneously achieve frequency filtering and direction filtering. © 2010 Elsevier Ltd. All rights reserved.

Wang Y.,Zhenjiang Watercraft College
Physica Status Solidi (A) Applications and Materials Science | Year: 2012

We report an indium-free transparent resistive switching random access memory (TRRAM) device based on a gallium-doped zinc oxide (GZO)-Ga 2O 3-ZnO-Ga 2O 3-GZO structure grown by metal-organic chemical vapor deposition. The bipolar resistive-switching behavior is investigated based on the filament model. ZnO insulator layer fabricated at different temperature are compared to further support the filament mechanism. The compliance current applied on the device is changed from low to high to study the properties of conductive filaments in ZnO. The Joule-heating effect is also studied by adjusting the integrating time in voltage sweeping. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Li M.,Zhenjiang Watercraft College
Advanced Materials Research | Year: 2013

The article analyzes the mathematical and physical models of the waves. Base on the oceanography existing statistical observations and spectrum function formula. This article puts forward the method of making waves modeling, and using mesh model and texture mapping techniques to achieve a photorealistic rendering of the waves. The methods have achieved good results in realistic and real-time. © (2013) Trans Tech Publications, Switzerland.

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