第7届全国中学生足球比赛破门特点分析

对我国当今足球比赛边路进攻典型战例进行分析,由实践上升到理论,继而指导实践,以提高我国青少年足球训练水平。     

一个新的基于EFALC的推理算法

针对目前的扩展模糊描述逻辑缺乏TBox约束下的推理算法,提出TBox约束下扩展模糊描述逻辑EFALC截概念可满足性问题及其推理算法.该算法的设计参考用于经典描述逻辑的tab-leau算法;详细描述了EFALC的转化规则和推理算法的过程,并使用递归函数调用、分支裁减和引入中间结果集合这3种技术对算法进行优化.证明了该优化推理算法的最坏时间复杂性为指数,且具有完备性和正确性,同时证明了TBox约束下EFALC截概念可满足性问题的复杂性是指数时间完全的.     

高尔夫球短杆进攻果岭技术教学训练的探索与实践

把球从果岭附近攻上果岭,尽可能靠近洞杯,是高尔夫技术中最为复杂的环节.现代高尔夫球比赛中洞杯的位置越来越复杂,优秀的短杆进攻果岭技术能有效提升球员下场的成绩.从认识洞位图入手,依据高尔夫球短杆进攻果岭的实践需要,将切击球、劈起球、高抛球和果岭边沙坑球列为该技术的教学内容,对四种球各自的打法和适用范围进行介绍后,将教学内容细化为初级、中级、高级共18个子部分.指出,选择合理的技术策略、培养距离感和方向感、找到适合自己的挥杆节奏、采用上杆幅度控制击球距离等是教学的重点内容,并分别进行了具体阐述.     

论“分层教育,合作学习”模式

“分层教育 ,合作学习”是一种分中有合 ,合中有分 ,分层合作 ,多维整合的全新教学模式。实践表明 ,它是“切实减轻学生过重负担 ,全面推进素质教育”的优选模式。     

用Dijkstra算法求解最优切割方式的模型

从待加工的长方体中加工出一个已知尺寸、位置预定的长方体,需寻找一种最优切割方式,利用图论中的Dijkstra算法可得到上述问题的数学模型和求解方法,同时对一组具体数据给出了最优解并进行了讨论,     

Digital Module 14: Planning and Conducting Standard Setting

In this digital ITEMS module, Dr. Michael Bunch provides an in-depth, step-by-step look at how standard setting is done. It does not focus on any specific procedure or methodology (e.g., modified Angoff, bookmark, and body of work) but on the practical tasks that must be completed for any standard setting activity. Dr. Bunch carries the participant through every stage of the standard setting process, from developing a plan, through preparations for standard setting, conducting standard setting, and all the follow-up activities that must occur after standard setting in order to obtain the approval of cut scores and translate those cut scores into score reports. The digital module includes a 120-page manual, various ancillary files (e.g., PowerPoint slides, Excel workbooks, sample documents, and forms), links to datasets from the book Standard Setting (Cizek & Bunch, 2007), links to final reports from four recent large-scale standard setting events, quiz questions with formative feedback, and a glossary.     

三种鲜切花保鲜剂的保鲜效果

观察了3种鲜切花(唐菖蒲、月季、康乃馨)不同配方的保鲜剂在武汉自然条件下,对切花外观品质和瓶插寿命的影响。从中筛选出各种鲜切花的较佳保鲜配方:配方1-9(2%S+250mg/L8-HQ+200mg/LCA+50mg/LCoSO4+100mg/LAl2(SO4)3+25mg/LAgNO3+15mg/LEDTA)对唐菖蒲的保鲜效果最好,可明显延长其瓶插寿命;配方2%S+250mg/L8-HQ+200mg/LCA+25mg/LAgNO3+15mg/LEDTA对月季的保鲜效果较好,能很好地延长花期,其瓶插寿命比对照组长12d;配方3%S+250mg/L8-HQ+50mg/LCA+20mg/LBA对康乃馨的保鲜效果最佳,其瓶插寿命达到了47d,保鲜效果显著。     

Reporting the Percentage of Students above a Cut Score: The Effect of Group Size

Large‐scale assessment results for schools, school boards/districts, and entire provinces or states are commonly reported as the percentage of students achieving a standard—‐that is, the percentage of students scoring above the cut score that defines the standard on the assessment scale. Recent research has shown that this method of reporting is sensitive to small changes in the cut score, especially when comparing results across years or between groups. This study builds on that work, investigating the effects of reporting group size on the stability of results. In Part 1 of this study, Grade 6 students’ results on Ontario's 2008 and 2009 Junior Assessments of Reading, Writing and Mathematics were compared, by school, for different sizes of schools. In Part 2, samples of students’ results on the 2009 assessment were randomly drawn and compared, for 10 group sizes, to estimate the variability in results due to sampling error. The results showed that the percentage of students above a cut score (PAC) was unstable for small schools and small randomly drawn groups.     

内蒙古国税重点税源与税负分析

税收是促进社会经济发展、改善民生、构建和谐社会最重要的调节器,重点税源是保证这一调节器发挥作用的核心力量。2012年,受世界经济持续低迷、国内经济发展困难增多的影响,虽然内蒙古国税税收收入增长率为4．07％,但同比却下降了28．23个百分点。作为重点税源的采矿业、制造业、批发和零售业、电力燃气及水的生产供应业四类行业也出现了明显的疲软,增幅放缓。为此,要通过加强重点税源审核、减少税收流失、培养新型税源等措施,合法合规增加各项税收收入。     

天水地区香石竹引种栽培试验研究

香石竹是世界四大切花之一,而我国北方地区香石竹切花绝大部分来自于南方,北方地区此前并无生产栽培记录。天水市林业科学研究所对引进的香石竹品种种苗的繁殖、无土栽培、日光温室生产、田间管理等引种栽培环节进行了四年多的试验,着重在品种选择、性状表现、种苗生产、栽培管理等方面进行数据分析,最后得出结论:天水地区的日光温室、塑料大棚适宜大多数香石竹种苗的引种栽培和切花生产。