共查询到19条相似文献，搜索用时 437 毫秒
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《世界儿童(小学生阅读版)》2009,(11):45-46
数独游戏 数独规则：数独游戏在9×9的方格内进行,用1至9之间的数字填满空格,一个格子只能填入一个数字。每个数字在每一行或每一列中都只能出现一次。 相似文献
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多元一次线性回归的正交设计 总被引：2，自引：0，他引：2
利用二水平正交表进行正交设计，以消除回归系数之间的相关性，从而简化了回归系数的显系数的显性检验，使设计具有了旋转性，并可以根据预测值直接寻找最优区域。 相似文献
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胡英武 《金华职业技术学院学报》2011,11(3):86-88
数独是近年流行的一种益智游戏,其最常见模式是在一个n行×n列又再分成n区共n2个小格的方中,填入适当的数字,使每一行、每一列、每一区都含有数字1～n,不重复.运用0-1规划的方法建立数独问题的整数规划模型,给出了9阶数独模型求解的Lingo程序,最后对模型进行了评价。 相似文献
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设计意图网络上的卡通乐乐熊猫形象深受班上孩子的喜欢,它带来的一些游戏更受欢迎,尤其是新型的数独益智游戏,有趣又有挑战性。如何将趣味但又抽象的数独元素引入幼儿游戏,于生活化、游戏化的情境中进行数学探究活动,我们在大班数学活动“乐乐家的数独果盘”中进行了一些尝试。 相似文献
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袁江南 《鹭江职业大学学报》2013,(4):36-40
按照均匀收敛的总体要求,通过分析不同权值抽头的均方偏差收敛过程,得到一种均匀收敛比例归一化最小均方算法．对PNLMS算法比例系数进行改进得到另一种均匀收敛算法．仿真结果表明：所提算法保持了PNLMS类算法初始收敛速度快的特点,在整个过程中获得了均匀的速度,稳态误差与NLMS算法基本相同． 相似文献
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基于图搜索策略的数独问题算法与实现 总被引：1，自引：0，他引：1
李昊 《通化师范学院学报》2009,30(10):43-45
图搜索策略是解决传统人工智能问题的有效方法．该文使用状态空间表示方法以及图搜索策略,提出了一种有效的解决数独问题（Sudoku）的算法,采用递归和回溯,进一步提高了算法的效率,并结合Excel和VBA给出了算法的具体实现。 相似文献
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以 Faster R-CNN 为代表的 two-stage 目标检测算法检测速度慢,而 one-stage 目标检测算法中的 SSD算法虽然检测速度快,但对交通标志类小目标的检测效果不佳。因此在 SSD 算法 VGG16 骨干网络上引入感受野块（RFB）结构,既提升检测速度又可在小目标检测上达到良好的检测精度。与此同时,为提高网络分类精度,在损失函数中加入中心损失。将 SSD 算法与改进的 SSD 算法在 VOC 数据集上进行训练,对比其性能可知,改进后算法 mPA 值达到 80.7%,相比 SSD300（VGG16）算法提高了 3.5%。该算法在 LISA traffic sign 数据集上训练,在迁移学习的基础上得到的 mPA 值为 78.4%,检测单张图像平均耗时为 20.5ms,可满足实时性要求。 相似文献
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AbstractThe objective of this study was to identify cognitive apprehensions used by fifth- and sixth-grade students (10–12-year-olds) when answering far generalization questions in two problems of visual pattern generalization. A total of 81 students solved two linear generalizing problems, presented in two different configurations, in a succession of figures (square tables or trapezoid tables). The results showed that students used different types of cognitive apprehensions to solve problems and that these apprehensions sometimes changed according to the configuration of the sequence of figures. This finding indicates that configurations could determine apprehensions used by students, which in some cases led to the emergence of algebraic thinking. In addition, difficulties in modifying apprehension and a lack of coordination between spatial and numerical structures could explain some students’ difficulties in far generalization. 相似文献
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余军 《贵州教育学院学报》2008,19(12):44-46
数据完整性是指在同一数据库中的不同数据表中的相同数据应当保持一致性和可靠性。数据完整性是评价一个数据库设计质量的重要指标,它直接影响到整个数据库运行的性能。SQL Server在保障数据库完整方面提供了强大的机制,如何在SQL Server数据库中实现数据的完整性进行探讨。 相似文献
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This study addresses heat transfer performance of various configurations of coiled non-circular tubes, e.g., in-plane spiral ducts, helical spiral ducts, and conical spiral ducts. The laminar flow of a Newtonian fluid in helical coils made of square cross section tubes is simulated using the computational fluid dynamic approach. The effects of tube Reynolds number, fluid Prandtl number, coil diameter, etc., are quantified and discussed. Both constant wall temperature and constant heat flux conditions are simulated. The effect of in-plane coil versus a cylindrical design of constant coil, as well as a conical coil design is discussed. Results are compared with those for a straight square tube of the same length as that used to form the coils. Advantages and limitations of using coiled tubes are discussed in light of the numerical results. 相似文献
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Review of Single Subject Research Examining the Effectiveness of Interventions for At‐Risk English Learners 
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下载免费PDF全文 Doris Luft Baker Catherine Richards‐Tutor Anthony Sparks Rebecca Canges 《Learning disabilities research & practice》2018,33(2):64-74
We review published single subject design (SSD) studies that examine the effects of interventions for English learners at‐risk or with learning disabilities. Results of our literature search yielded 10 studies, five in reading, one in reading and behavior, and four in mathematics that met our inclusion criteria. Seven studies targeted Spanish‐speaking English learners, and three studies included students who spoke other languages than English and/or English only students. Two studies in mathematics included native language instruction. Six studies included English learners in second grade and above, and one study included high school students. We were able to calculate effect sizes (Hedges g) for eight of the 10 studies. Findings indicated a significant effect of the intervention for 12 of the 18 dependent variables measured. SSD methodology has the potential to help researchers and practitioners better understand what interventions work for English learners, and under what circumstances. 相似文献