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Systematically evaluating a network teaching platform is essential in improving the quality of online teaching and therefore, can make profound significance in development of web-based teaching platforms. This paper aims to elaborate a method of constructing an user-oriented evaluation system for web-based teaching platforms for teaching Chinese as a second language (TCSL), which are, firstly, to...
The Mills Cross uses two orthogonal linear receiving arrays whose voltage patterns are multiplied to form a product pattern. With isotropic elements, the element spacing of each linear array is one half wavelength. This paper introduces a modified Mills Cross with isotropic elements spaced one wavelength apart, thereby reducing the mutual coupling between array elements. Moreover, it requires approximately...
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