Lifang Qiao

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A new method of designing horn-fed frequency scanning holographic antenna is proposed. The artificial surface design of holographic antenna is based on generalized law of reflection. The input admittance is utilized to construct the interference pattern of the surface which is intervened by the excitation wave and the required radiation wave. The scalar(More)
Industrial wasteland tourism has rapidly developed in China. In this review, we discussed the progress in tourism resources and tourism planning, including value evaluation of tourism resources, resources and products development, development orientation of tourism, tourism landscape planning method and technology, and the international successful cases.(More)
The sustainable development of tourism needs the support of GIS (geographic information system) technology. The aim of this paper is to provide the basis for the Chinese tourism by summarizing the application of GIS technology. In Chinese tourism, GIS mainly applies in the following several aspects: investigation of tourism resources and the development of(More)
The wetland ecosystem is a special natural complex formed by reciprocity between land and water. In recent years, there have many studies about wetland ecosystem in China. The aim of this paper is to summarize the “hot research topics” in the wetland ecosystem researches of China, which include value evaluation of wetland ecosystem services;(More)
The expectation of secondary vocational schools on the capacity of teachers is investigated in the form of questionnaire, AHP is applied for the analysis, and the result shows that: in the basic quality factors of teachers, professional ethics is the most important, and then teamwork; in the basic skill factors, language competence and student management(More)
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