Value of a new post-procedural intravascular ultrasound score in predicting target vessel revascularization after coronary drug-eluting stents implantation

Objective: There is no simple or feasible post-procedural intravascular ultrasound (IVUS) score to predict major adverse cardiac events (MACE) in patients undergoing drug-eluting stents (DES) implantation. The aim of this study is to validate a new IVUS score for predicting MACE. Methods: A total of 295 patients (with 322 lesions) were enrolled. IVUS score was calculated in each lesion based on five IVUS morphological characteristics: inflow/outflow disease, malapposition, underexpansion, tissue protrusion, and edge dissection (iMUTE score). We assigned two points to an underexpansion and one point for each presence of other factors. Patients were divided into low score (iMUTE score<2, n=137) and high score (iMUTE score≥2, n=158) groups. Results: At one year follow-up, a trend was seen in favor of the low iMUTE score group in MACE (3.65% vs. 10.10%; P=0.052), and there was more target vessel revascularization (TVR) in the high iMUTE score group compared with low score group (6.96% vs. 1.46%; P=0.044). Low iMUTE score was an independent predictor of freedom from TVR at one year (adjusted hazard ratio (HR) 0.5, 95% confidence interval (CI) 0.1–0.8; P=0.02). Conclusions: Post-procedural IVUS iMUTE scoring was simple and feasible in clinical practice, and can provide independent prognostic value for TVR in patients undergoing DES implantation.     

发展中国田径十项全能运动的对策探讨1

运用文献资料法、比较研究法、数理统计法,笔者以中外优秀运动员整体水平及中外顶尖运动员分别在九运会和第24届奥运会的成绩进行比较分析.结果表明中国田径十项全能运动水平与世界存在较大的差距,不同程度地表现在除1500m项目外的9个单项上,尤其是投掷项目,同时应加强各项目协调发展,不可片面地强调和发展某个项目和某专项素质.中国优秀顶尖运动员齐海峰在今后训练中应加强力量素质训练,以铅球和铁饼成绩的提高为目标,使他得分结构更趋合理.     

对大学生体育达标评分标准的探讨——以男子50m与100m、1000m与1500m部分径赛项目为例

本文通过对在校大学生整群随机抽样的结果 ,从中得到男子 5 0m与 10 0m、 10 0 0m与 15 0 0m部分径赛项目的有效成绩 ,并进行了数理统计分析 ,发现《大学生体育合格标准》中反映速度和耐力素质两项跑的项目评分存在齐同性和不合理的现象 ,笔者对该评分段进行了科学的论证和整体的修订。目的是使今后大学生的体育达标评分更趋于合理化 ,为有关单位和部门提供一些可行的参考性建议     

基于分类树和支持向量机的个人信用评估方法

通过对分类树和支持向量机这两种方法在个人信用评估领域的适用性分析,提出了一种将分类树和支持向量机结合起来处理个人信用评估的新方法．用该方法处理含有混合数据的个人信用评估实例,结果表明,该方法有效地提高了整个模型的训练精度和测试精度．     

双评作文题网上阅卷评卷教师评卷水平评价维度的确定

本文基于对北京高考某学科网上阅卷数据分析的基础上,提出从六个维度,对评卷教师的评卷水平进行度量。这六个维度是掌握标准宽严、趋中-发散偏好、有效度、主客观相关、考核成绩和速度。并且为对教师做出一个整体评价,对六个维度的如何进行加合提供一定的建议。     

几个英语作文自动评分系统的原理与评述

本文介绍目前美国在大规模考试和英语教学中最为流行的几个作文自动评分系统的基本原理并对这些系统进行简单的评述。所涉及的系统包括Project Essay Grader(PEG),Intelligent Essay Assessor (IEA),E-rater和Criterion,IntelliMetric和MY Access!,Bayesian Essay Test Scoring System(BETSY)。     

一对一数字化互动反馈智能课堂学习环境研究

为了实现课堂教学中及时全面的互动反馈,灵活开展各种模式的学习和评价分析管理,该文以互动反馈系统为基础,结合电子书包、一对一数字化学习、云桌面、知识库、基于大数据的学习分析、虚拟课堂等数字化学习相关技术进行改进后,构建了一种一对一数字化互动反馈智能课堂学习环境。形成的知识库,可进行基于大数据的学习分析、个性化学习资源推荐、启发式联想搜索知识、主观题的自动评分等。该文提出了一种主观题交叉评分的方法,并给出了主要流程方案,实现了复杂主观题也能进行互动并可当堂反馈。     

国家重点实验室运行驱动力及对策研究

运用主成分分析及专家评分法,围绕四个方面分析国家重点实验室运行驱动力,设计运行驱动力影响因子并计算了其权重.研究发现,现阶段推动国家重点实验室运行发展的驱动力主要以政府推动力和创新带动力为主,科学家及市场的带动作用还没有完全发挥.最后,提出了针对国家重点实验室运行发展的政策建议.     

第26届奥运会美国男篮得分主要手段探析

通过录像观测统计和比较分析等方法,对美国男篮在第２６届奥运会比赛中得分手段进行研究,结果表明美国男监主要得分手段是：全场紧逼夹击－抢断球快速反击、个人一攻工,全队三人间策应传切配合进攻得分,旨在学习美国队经验,提高我国男篮运动技术水平。     

Evaluating the reliability of a detailed analytic scoring rubric for foreign language writing

The demand for valid and reliable methods of assessing second and foreign language writing has grown in significance in recent years. One such method is the timed writing test which has a central place in many testing contexts internationally. The reliability of this test method is heavily influenced by the scoring procedures, including the rating scale to be used and the success with which raters can apply the scale. Reliability is crucial because important decisions and inferences about test takers are often made on the basis of test scores. Determining the reliability of the scoring procedure frequently involves examining the consistency with which raters assign scores. This article presents an analysis of the rating of two sets of timed tests written by intermediate level learners of German as a foreign language (n = 47) by two independent raters who used a newly developed detailed scoring rubric containing several categories. The article discusses how the rubric was developed to reflect a particular construct of writing proficiency. Implications for the reliability of the scoring procedure are explored, and considerations for more extensive cross-language research are discussed.