In recent years , research on learning activities has prevailed the world and found its way in some front subjects , however much of its production has not been introduced to the pedagogic study and practice . problems stand out in that there is low learning efficiency in study of students at large and the pattern of the course design , teaching approach , and education evaluation method are comparatively demoded with the coming of the information age , historic changes in both life style and learning style are highlighted 近几年来，对人类学习活动的研究虽然已经发展成为当今世界多学科交叉的前沿课题，但多数研究成果尚未引入教育理论与实践中来，教育行政部门、学校和教师几乎没有考虑如何通过培养来提高学生的学习能力，致使目前学习方式与课程、教学、教育评价模式都比较落后，学生学习效率普遍比较低，无法适应时代的要求，这种状况在我国表现得很突出。
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Abstract : the implement of plc in elevator electric control system is presented , with a focus on the design clue of maximum object dynamic optimal ways of electing story , hardware and software of the system . it is important for the reconstruction of demoded elevator and the improvement of technology and quality of native elevators 文摘:论述采用plc对电梯的电控系统进行改造的主要方法，着重介绍最大目标动态寻优选层的设计思路及整个系统硬件、软件的设计方法，对改造老式电梯,提高国产电梯的技术水平和质量，具有重要的意义。
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It is demoded that making techno - economic verification with the traditional gb . two special ship types , that are car carrier and fpso , are introduced including main dimensions , design feature and the corresponding engineering economic analysis is made on the basis of gb 本论文在gb11697一89基础上，研究了两种特殊船型一一车辆滚装船和浮式生产储油卸油船( fpso )的船型要素概况和结构功能特点，同时针对上述两种特殊船型的技术经济指标进行改进以及做相应技术经济论证。
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