相依样本下参数的经验欧氏似然比统计量     

颜贵兴 《海南师范学院学报》2006,19(2):131-135

在强平稳的相依样本下讨论半参数模型参数的经验欧氏似然比统计量．  相似文献   

一切从专项需要出发——谈高中学生800m专项训练方法     

胡传庆 《中等职业教育》2007,(29):34-36

800m专项训练需要从步幅与步频的节奏训练、力量训练、身体姿势训练、身体协调性训练等方面进行科学地选择与安排,以减少训练中不必要的浪费。  相似文献   

竞渡比赛优化模型     

王新华 《深圳职业技术学院学报》2004,3(2):45-47

建立了竞渡比赛的最优控制模型，给出了最优解的必要条件和教值计算方法。作为特例，回答了2003年全国大学生数学建模竞赛D题所提出的主要问题。  相似文献   

对中长跑训练新动向的探究   总被引：3，自引：0，他引：3  

孙文革 《商丘职业技术学院学报》2005,4(2):79-80

通过文献资料法、统计对比法及本人多年的训练实践，在分析大量有关资料的基础上，根据中长跑训练发展的动向，针对目前中长跑训练中存在的问题，提出了以“速度”为中心，以短补长，以长补短，长短互补，全面发展的训练思路。  相似文献   

弗得伯格模型与我国企业专利竞赛策略   总被引：1，自引：0，他引：1  

高山行  戴荣 《研究与发展管理》2002,14(5):29-33

介绍弗得伯格等人的二阶段专利竞赛模型,并将该模型与后动企业的竞争战略联系起来,提出了后动企业在专利竞赛中可以选择的三种战略,即理性的不战而退战略、进攻性的速战速退战略、防守性的紧跟战略,从而为后动企业参与专利竞赛提供了战略选择的依据。  相似文献   

School psychology graduate education retention research characteristics: Implications for diversity initiatives in the profession     

Sherrie L. Proctor  Courtney Owens 《Psychology in the schools》2019,56(6):1037-1052

Lack of racial and ethnic diversity in the school psychology workforce has been a concern since the profession's inception. One solution is to graduate more racially and ethnically diverse individuals from school psychology programs. This structured review explored the characteristics of studies published from 1994 to 2017 that investigated graduate student retention and school psychology. An electronic search that included specified databases, subject terms, and study inclusion criteria along with a manual search of 10 school psychology journals yielded two published, peer‐reviewed studies focused primarily on graduate student retention and school psychology over the 23‐year span. Two researchers coded the studies using a rigorous coding process with high inter‐rater reliability. Findings suggest that mostly Black and White individuals served as participants, undergraduate students represented the largest group sampled, and key school psychology stakeholders’ views were missing. Additionally, programs interested in retaining racially and ethnically diverse students should have a commitment to multicultural issues, expose students to diverse professional networks and mentorship, and cultivate an inclusive program environment. Implications point to a need for more studies focused on school psychology graduate student retention in general and in specific relation to retaining racial and ethnic minoritized students.  相似文献   

If we build it,will they come? The effect of new athletic facilities on recruiting rankings for power five football and men's basketball programs     

Matt Ryan Huml  N David Pifer  Caitlin Towle  Cheryl R Rode 《Journal of Marketing for HIGHER EDUCATION》2019,29(1):1-18

College athletics is currently in the midst of a building boom in which universities are competing with each other to reach an always-increasing standard of lavish athletic facilities. While these facilities are costing in the tens or hundreds of millions of dollars, little research is examining the return on investment for athletic programs. The purpose of this study was to examine the effect of new athletic facilities on recruiting rankings for Power Five football and men's basketball programs. Data was collected on athletic facilities newly constructed or renovated from 2005 through 2015 at Power Five NCAA Division I programs. Using LSDV fixed effects regression models, results found a lack of significant improvement within football and basketball recruiting rankings following the completion of new athletic facilities, but some significance in the two years before the project was completed. Significant control variables also highlighted the effects that coaching changes can have on recruiting.  相似文献   

“None of the Kings on Earth is Their Equal in ʿaṣabiyya”: The Mongols in Ibn Khaldūn's Works     

Josephine van den Bent 《Al-Masaq: Islam & the Medieval Mediterranean》2016,28(2):171-186

The rise of the Mongol empire was a shock to the Arab world and led many Arab authors to describe these conquerors in decidedly negative terms. The great historian Ibn Khaldūn also discusses the Mongols' rise and their conquests. As a nomadic people they challenged and defeated sedentary populations and founded their own dynasties. Consequently, the Mongol conquests perfectly fit Ibn Khaldūn's theories on ?a?abiyya – which is superior in nomadic groups – and the rise and fall of dynasties. For the Maghrebi historian, the rise of the Mongols was a natural step in the course of history. This consequently colours his view of the Mongols and affects the way he portrays them, especially regarding the themes of violence and religion – recurring themes in many contemporary works dealing with the Mongols – and in his depiction of the Turco-Mongolian conqueror Timur, who is presented in a more favourable light by Ibn Khaldūn than he is in many contemporary works.  相似文献   

Within‐High‐School Versus Across‐High‐School Scaling of Admissions Assessments: Implications for Validity and Diversity Effects          下载免费PDF全文

Jack W. Kostal  Paul R. Sackett  Nathan R. Kuncel  Philip T. Walmsley  Melissa S. Stemig 《Educational Measurement》2017,36(1):39-46

Previous research has established that SAT scores and high school grade point average (HSGPA) differ in their predictive power and in the size of mean differences across racial/ethnic groups. However, the SAT is scaled nationally across all test takers while HSGPA is scaled locally within a school. In this study, the researchers propose that this difference in how SAT scores and HSGPA are scaled partially explains differences in validity and subgroup differences. Using a large data set consisting of 170,390 students each of whom matriculated at one of 114 separate colleges, the researchers find that awarding SAT scores by ranking SAT within a high school generally results in substantial reduction in the size of subgroup mean differences for this predictor. However, validity for predicting first‐year GPA is also reduced by a small amount. Conversely, placing HSGPA onto a nationally normed metric through the use of multiple regression procedures results in a moderate increase in the size of subgroup mean differences, while also producing a small increase in validity. Taken together, these findings suggest that differences in predictor scaling can partially explain differences in the size of subgroup mean differences between HSGPA and SAT scores and have implications for predictive power.  相似文献   

The Byzantines and Saladin: Some Further Arguments     

Savvas Neocleous 《Al-Masaq: Islam & the Medieval Mediterranean》2013,25(2):204-221

This is the second of two articles by the same author arguing against the thesis that there was a conspiracy between the Byzantine emperors and Saladin, sultan of Egypt and Syria, against the crusader states and the Third Crusade in the 1180s. While the focus of the first article was primarily on the Latin sources, the present study shifts the focus to the Arabic primary material, hitherto largely neglected or inadequately treated by modern historians. Through a critical re-examination and re-interpretation of the Arabic sources, backed by the introduction and discussion of new Latin material when necessary, this article presents expanded arguments on the relations between the Byzantine Empire, the Sultanate of Konya and Saladin in the 1180s. The conclusions lend further support to the view that the Byzantine rulers and Saladin never concluded an alliance against the Latin settlers of Outremer and the Third Crusade.  相似文献