Papers by Keyword: Array

Abstract: Within this article, a method has been developed to reduce the amount of transmitted data from the receiving and preprocessing unit to a personal computer. On logical grounds, there is compelling reason to use as a basic property of an ellipse as a ground of the method. The developed data processing algorithm for the multi-element array system was tested in the MatLab software package. Also, a block diagram and data processing algorithm were developed for the practical implementation on a field programmable gate array.

Abstract: The paper presents a new array of oscillating wave energy converter, which is in accordance with nowadays’ research tendency of China: high power, high efficiency, high reliability and low cost. The paper gives the design scheme and design parameters of the new wave energy converter. It's composed of the wave energy converter unit, which can be assembled to arrays based on demand. Besides, the paper analyzes the power generation principle and advantages of the device. The research results could be a reference for wave energy’s exploration and utilization.

Abstract: Bulk high temperature superconductors are usually used as arrays due to the limited size and performance of a single bulk. To find a reasonable array pattern for the superconducting maglev vehicle, we studied the levitation force of four multi-seeded rectangular YBaCuO blocks with three possible arrays above a permanent magnet guideway (PMG). Experimental results show that the levitation force can be improved through an optimal array pattern of the bulk superconductor. The method is to avoid the joint gaps of bulk arrays in a strong magnetic field area of the PMG thus improving the utilization rate of the applied magnetic field. The optimal array pattern will be helpful to improve the levitation performance and reduce the quantity of onboard superconductors.

Abstract: Electrical resistivity technique has become a popular alternative tool by the geotechnical engineers in subsurface investigation. This study presents the influence of soil electrical resistivity value (ERV) due to the different types of electrical resistivity array used in practice. The dissimilarity of ERV was become a popular debate by the engineers which posses less fundamental knowledge in this area. In the past, the theory of electrical resistivity technique was less being discovered by the engineer which creates lots of black boxes during the utilization of electrical resistivity method (ERM) in engineering purposes. Hence, the result which produced from the ERM was difficult to deliver in a sound of definitive ways due to lack of knowledge and experienced of most engineers. Hence, this study presents the influence of soil ERV due to the different types of array used with particular reference to as Dipole-dipole and Pole-dipole. A line of electrical resistivity imaging was performed on small embankment of sandy and lateritic soil with different types of array using ABEM SAS (4000) equipment. Three in line of soil samples were tested for moisture content (w) test immediately after the electrical resistivity data acquisition was completely measured. Moreover, particle size distribution test also was performed for all soil samples in order to support the findings. It was found that the ERV was never be the same for each types of array used even on the same particular location of the survey line. However, it was found that there was a consistent relationship between ERV and moisture content for both types of soil tested which can be represent by ERV 1/w. Hence, it was found that ERV produced was relative to the types of array used during the field measurement. Each types of array were applicable to be used in subsurface profiling and its selection was subjected to the target of interest.

Abstract: Using relaxor ferroelectric single crystals PMNT as piezoelectric phase and epoxy resin as a non-piezoelectric phase material, the piezoelectric composite is fabricated with the cutting - filling method. Using the same micro-structure parameters and the same process, the piezoelectric composite is prepared with the conventional piezoelectric ceramic PZT5 as piezoelectric phase material. The transducer array is respectively assembled with the PMNT /epoxy composites and PZT5/epoxy piezoelectric composite materials. Experimental results show that the relaxor ferroelectric single crystals PMNT / epoxy composite transducer array has higher sensitivity and less resonant impedance than PZT5/epoxy piezoelectric composite transducer array.

Abstract: The self-organized hollow TiO₂ hemisphere with a height of 130 nm and a diameter of 200 nm was formed. Highly ordered TiO₂ nanotube arrays of 200-nm pore diameter and 700-nm length were grown perpendicular to a FTO substrate by infiltrating the alumina pores with Ti (OC₃H₇)₄ which was subsequently converted into anatase TiO₂. The structure was treated with TiCl₄ to enhance the photogenerated current and then integrated into the DSSC using a commercially available ruthenium-based dye. The dye-sensitized solar cell using self-organized hollow TiO₂ hemispheres under porous alumina with TiO₂ nanotubes inside as the working electrode generated a photocurrent of 5.00 mA/cm², an open-circuit voltage of 0.58 V and yielding a power conversion efficiency 1.77 times the conventional nanoparticle-based DSSC.

Abstract: Firstly in this paper,an antipodal Vivaldi antenna is designed.The bandwidth is from 6GHz to 18GHz. The simulated results show good electric performance and the voltage standing wave ratio is less than 2 in the whole bandwidth.Secondly depending on this unit,this paper designs two kinds of arrays and estimates their radiation characteristics,respectively.The one array is a 1×8 array and the another array is a X-cross structure array with four elements.

Abstract: As its international status, mastering C programming language is very important, for example the java language, popular and widely used at present, which has all kinds of connections with C programming language. In the C language, the bubbling sort, which has the knowledge of the cycle and array, has been seen as classic examples to explain, and also is used in a variety of computer exams. One important reason is the bubbling sort itself more classic; another is that it is not easy for students to grasp and understand the bubbling sort. This paper will explore a new teaching method--introduction of mathematical thought--to help students to understand and master the bubbling sort.

Abstract: Large area carbon nanotubes array were synthesized on the quartz glass by a simple chemical vapor deposition. Scanning electron microscopy and transmission electron microscopy were used to evaluate the morphology and structure. The results show that the well-aligned arrays are synthesized and their length can reach millimeter range, these CNTs have varying outer diameters from 20 to 70 nm and display hollow tubular structures.

Abstract: As a new light-emitting material, quantum dot having the advantages of other materials that can not be replaced. It is not only the fluorescence quantum yield, and light stability. Therefore, we use CdSe core-shell structure of the quantum dot LED devices as the electron-hole recombination layer. In this paper, we synthesized emission peak is located at 588nm CdSe core-shell quantum dots, and made array display LED devices with ZnO as the electron transport layer.