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硕果和玫瑰     
要想有个美丽花园, 面积大小姑且不管, 若要园中长满鲜花, 务必要把汗水挥洒。  相似文献   
74.
An experimental machine vision apparatus was used to identify and extract recyclable plastic bottles out of a conveyor belt. Color images were taken with a commercially available Webcam, and the recognition was performed by our homemade software, based on the shape and dimensions of object images. The software was able to manage multiple bottles in a single image and was additionally extended to cases involving touching bottles. The identification was fulfilled by comparing the set of measured features with an existing database and meanwhile integrating various recognition techniques such as minimum distance in the feature space, self-organized maps, and neural networks. The recognition system was tested on a set of 50 different bottles and provided so far an accuracy of about 97% on bottle identification. The extraction of the bottles was performed by means of a pneumatic arm, which was activated according to the plastic type; polyethylene-terephthalate (PET) bottles were left on the conveyor belt, while non-PET bottles were extracted. The software was designed to provide the best compromise between reliability and speed for real-time applications in view of the commercialization of the system at existing recycling plants.  相似文献   
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The purpose of this study was to develop, validate, and establish the reliability of an instrument that measures preservice teachers' self-efficacy in regard to the teaching of science as inquiry. The instrument, Teaching Science as Inquiry (TSI), is based upon the work of Bandura (1977, 1981, 1982, 1986, 1989, 1995, 1997), Riggs (1988), and Enochs and Riggs (1990). Self-efficacy in regard to the teaching of science as inquiry was measured through the use of a 69-item Likert-type scale instrument designed by the author of the study. Based on the standardized development processes used and the associated evidence, the TSI appears to be a content and construct valid instrument with high internal reliability for use with preservice elementary teachers to assess self-efficacy beliefs in regard to the teaching of science as inquiry.  相似文献   
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The paper is a response to Whitehead, who has questioned prevailing views of knowledge and values in Higher Education, specifically the quality of human relationships in education. It examines from an orthodox point of view questions of dialectical logic; knowledge acquisition and knowledge structures; the differentiation of knowledge structures; facts and values; and theory and practice. The main concern is to show that there is no essential conflict between the pursuit of objective knowledge and human Values. There is, on the contrary, the highest educational virtue in achieving impersonal, objective knowledge.  相似文献   
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