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A compact microstrip patch annular array is proposed to excite the TE01 (TE, transverse electric) high-order mode in circular waveguide. This annular array is composed of four microstrip patches which are laid and fed rotationally. The electromagnetic simulation software, high-frequency structure simulator is used to model the electric field radiated by the annular array. It is found that the electric...
A four-dimensional hyperchaotic system based on Lü chaotic system is designed by linear feedback expansion. Dynamic characteristics of the system have been further studied after the introduction of time delays. A method of designing time-delay hyperchaotic digital circuit based on DSP Builder is presented. The new hyperchaotic system is discretized prior to overcome the inherent shortcomings by analog...
In this paper, the scientific methods to select well pump for the user are presented. The major factors that affect the type selecting of well pumps are discussed in detail, including pump capacity, water head, minimum static water depth of the well and its changing laws, and so on. The three main methods to get the optimum water inflow of well pump are introduced, including test, estimation, and...
The source, purpose and significance of the engine advanced manufacturing engineering - 2μm-program is introduced. The relatively complete definition of the 2μm-program is firstly put forward. The general research goal of the 2μ-program is introduced from engine design to manufacturing process, detection, and so on. The main research contents as well as final targets of the program are presented....
As a bridge of communication between enterprise and customers, E-commerce website has important influence for selection of customers. Whether E-Commerce Website is accurately evaluated is essential a very key issue. Objective and reasonable evaluation can make the E-commerce website perfection, and through evaluated result, the shortcomings of E-commerce website can be corrected. This paper presents...
Multiple attribute decision-making theory under uncertainty is an important part of decision making theory, in this paper, a grey multiple attribute decision-making approach is proposed to study multi-criteria decision-making problems under uncertainty in which criteria values are interval gray numbers. Using grey related analysis as a means to reflect uncertainty in multiple attribute models through...
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