我国高等教育大众化进程中的潜在风险探析

高等教育作为人类有目的的人力资本增值的投资活动，它给社会和受教育个人带来滞后性高经济回报的同时，也存在着潜在风险，特别是在高等教育大众化的进程中，表现得十分明显，当这种风险的“量”累积达到一定程度时，也会产生危机。借鉴国外发达国家发展的经验和教训，充分发挥我国高等教育的后发优势，成功防范和化解我国高等教育大众化进程中的潜在风险，确保我国高等教育持续协调发展，具有重要的现实意义。     

谁是先锋——试论“先锋”概念的变化

中国的先锋文学出现后，人们对文学先锋的认识经历了这样三个阶段：混指、定指和泛化。从混指到泛化，是一个伴随着复杂心态的认识深化的过程。混指反映出急切期待中的不知所措；定指反映了与先锋文学的正面相遇以及对先锋文学的认祖归宗；泛化是新的文化语境夹缝中的另一种迫切期待和呼唤。     

谈毛泽东对认识运动总秩序理论的贡献

知行统一观虽然不是毛泽东首先提出的，但在使之取得中国化的形式上他作出了科学的总结，特别在于他在阐明认识运动的总秩序时作出了新的理论概括：一是实践和认识反复的螺旋式前进运动；二是特殊和一般反复的螺旋式前进运动；三是认识论和群众路线的统一。     

浅谈中学化学中的置换反应

置换反应是中学化学中的主要反应,也是典型的氧化还原反应.置换反应分为金属置换金属的反应,金属置换非金属的反应,非金属置换金属的反应,非金属置换非金属的反应.     

The bibles of the research scientist

Considerable attention has been focused on the relationship between nonverbal communication behavior and student perceptions of the teacher. One important observation is that teachers frequently emit nonverbal messages that contradict their verbal ones, but the effects of this modal discrepancy are not well understood. In the present study, vocal cues are isolated as the nonverbal behavior for study. The interaction of vocal cues and verbal messages is examined with respect to its impact on teacher credibility. The results indicate that the students’ perceptions of sociability are influenced by perceived discrepancy between words and attitudes. Perception of competence, on the other hand, appears to be dependent on positive vocal cues.     

Item difficulty in the evaluation of computer-based instruction: an example from neuroanatomy

This article reports large item effects in a study of computer-based learning of neuroanatomy. Outcome measures of the efficiency of learning, transfer of learning, and generalization of knowledge diverged by a wide margin across test items, with certain sets of items emerging as particularly difficult to master. In addition, the outcomes of comparisons between instructional methods changed with the difficulty of the items to be learned. More challenging items better differentiated between instructional methods. This set of results is important for two reasons. First, it suggests that instruction may be more efficient if sets of consistently difficult items are the targets of instructional methods particularly suited to them. Second, there is wide variation in the published literature regarding the outcomes of empirical evaluations of computer-based instruction. As a consequence, many questions arise as to the factors that may affect such evaluations. The present article demonstrates that the level of challenge in the material that is presented to learners is an important factor to consider in the evaluation of a computer-based instructional system.     

乡镇土地利用规划专题地图概括技术探讨

本文主要从数量特征和质量特征方面探讨第二次土地调查基础数据库中专题地图的概括方法,以ArcGIS9.3为平台,结合其缩编工具,进行土地规划专题地图概括,以达到各乡镇在专题地图中的概括批处理,包括对土地利用要素进行简化或夸大,轮廓的平滑处理,以及地图符号的选取等。将该区域的土地利用的规律性和典型特征表现出来,作为规划修编的辅助资源。     

一道经典几何命题的多种证明与推广

本文通过研究,给出一道经典几何命题--蝴蝶定理的六种证法.同时,利用射影变换知识,易将此命题进行系列衍变推广.     

蝴蝶定理的衍变推广

蝴蝶定理是欧氏几何中与圆有关的一个重要定理 ,而欧氏几何又是射影几何的子几何 ,本文将利用射影变换将圆映射为常态的二次曲线 ,从而将蝴蝶定理衍变推广为射影几何的命题 ,以丰富的射影几何的内容