排序方式： 共有119条查询结果，搜索用时 281 毫秒
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高考政治试题由于其巨大的权威性和社会影响力,一直受到社会各界的广泛关注,随着新课程改革的全面推进,高考政治试题也呈现出注重学生成长、关注身边生活、不受教材和传统束缚的特性,试题内容和形式丰富多样,成为引领高中政治教学发展方向的重要力量.坐标曲线图是分析经济现象和经济活动的重要工具.在近几年的新课标高考中,利用坐标曲线考查经济生活中概念之间的关系的试题明显增多,具有一定难度.如何让学生在高考中对坐标曲线有效分析,提高准确率,这是高三政治教师应深思的问题. 相似文献
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一、考生“短文改错”答题情况
从上图来看,2012和2013届考生在新课标高考英语答题中表现正常,整卷平均正答率分别为54．87％和52．24％,试卷整体难度系数为5．487和5．224,与命题理想难度系数5．5基本一致。从两年的曲线图走势来看,趋势非常一致,说明这两年同一题型难度及考生答题情况基本一致。 相似文献
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在高中生物教材第一册第二章第三节《光合作用》后有一道习题,题目如下。题目：下图是夏天晴朗白天,某种绿色植物叶片光合作用强度的曲线图,分析曲线图并回答： 相似文献
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CHAI Deng-feng PENG Qun-sheng 《浙江大学学报(A卷英文版)》2007,8(8):1218-1226
This paper presents some techniques for synthesizing novel view for a virtual viewpoint from two given views captured at different viewpoints to achieve both high quality and high efficiency. The whole process consists of three passes. The first pass recovers depth map. We formulate it as pixel labelling and propose a bisection approach to solve it. It is accomplished in log2n（n is the number of depth levels） steps,each of which involves a single graph cut computation. The second pass detects occluded pixels and reasons about their depth. It fits a foreground depth curve and a background depth curve using depth of nearby foreground and background pixels,and then distinguishes foreground and background pixels by minimizing a global energy,which involves only one graph cut computation. The third pass finds for each pixel in the novel view the corresponding pixels in the input views and computes its color. The whole process involves only a small number of graph cut computations,therefore it is efficient. And,visual artifacts in the synthesized view can be removed successfully by correcting depth of the occluded pixels. Experimental results demonstrate that both high quality and high efficiency are achieved by the proposed techniques. 相似文献
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地理曲线图是对地理事象进行定量分析的手段之一，或表示地理事象时空分布变化规律，或阐明地理事象之问的数量演变，或揭示地理事物之间的相互联系等，它具有简明、形象、易读的特点。地理曲线图把地理内容具体化，并把字、数字信息转化成图像信息，具有显的直观教学效果。 相似文献
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2007年高考《考试大纲》中明确要求：“正确理解、分析生物学中以图表、图解等表达的内容和意义,并能用图表等多种表达形式准确地描述生物学现象和实验结果．”纵观广西近三年的高考试题,坐标曲线图题每年都有,是高考的热点,一直备受命题专家们的青睐．下面是笔者指导学生复习坐标曲线图的一些体会： 相似文献
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乔宗敏 《重庆大学学报(英文版)》2005,4(2):121-124
1 Introduction 1 Let X as a compact metric space with the metric d and f :X → Xas a continuous map. For every nonnegative integer n , define f ninductively by f n = f ? f n?1, with f 0as the identity map on X . If there is a positive integer n such that f n( x )= x, the point x of X is called the periodic point of f and the least n is called the periodic point of x . A periodic point is called a fixed point. Denote the fixed points set and the periodic points set of f respectively by F ( f… 相似文献