运用模糊综合评价法评价体育新课标下学生的学习

通过对学生学习评价指标体系的建立,确定评价的等级和隶属度,采用专家评判平均法确立各项指标的权重。运用模糊综合评价法对学生的学习进行评价,旨在找到一种能体现新课标理念的、科学的、易探作的评价方法,更好地为素质教育服务。     

Statistical modelling of knee valgus during a continuous jump test

Landing with the knee in a valgus position is recognized as a risk factor for anterior cruciate ligament (ACL) injury. Using linear and non-linear regression analyses, the purpose of this study was to examine the correlation between two-dimensional (2D) knee valgus and three-dimensional (3D) knee kinematics measured during a jump landing task. Twenty-eight female collegiate athletes participated. All participants were required to perform a continuous jump test. The average maximum angles of abduction and internal tibial rotation during landing were measured using the Point Cluster Technique. Average peak knee valgus angle was measured using a 2D approach. Linear and non-linear regression analyses between 2D valgus and 3D knee abduction, and between 2D valgus and 3D internal tibial rotation, were performed. The R2 value between 2D valgus and 3D knee abduction was significantly different from zero and had a moderate correlation for all models, whereas the R2 value between 2D valgus and 3D internal tibial rotation was not significantly different from zero. The 2D approach could be used to screen a specific group of individuals for risk of ACL injury; however, using frontal plane 2D analysis of valgus motion to evaluate internal tibial rotation is not advised.     

Stability analysis of nonlinear control systems with characteristics equations having complex coefficients

In this paper, the stability equation method is applied to the analysis of nonlinear systems with characteristics equations having complex coefficients. Three types of systems are studied: those with unstable open-loop poles, unstable characteristics roots or an equal number of open-loop poles and zeros.     

中国武术散打运动员在K-1比赛中的制胜策略研究

文章通过对我国武术散打运动员参加K-1比赛的录像研究分析,对双方运动员在比赛中的技术水平、身体素质、心理竞技状态进行对比分析,找出我国武术散打运动员在K-1比赛中的的优势和不足,并试图找出原因,以期为以后中国散打运动员在K-1比赛取得更好的比赛成绩乃至成为K-1比赛的王者提供理论指导。同时促进我国武术散打的更新和完善、更快地与世界搏击运动接轨。     

学院走向民间：传统武术发展谫论

文章以传统武术发展现状及体育院校武术专业存在的弊端为依据,对学院走向民间与传统武术的发展进行了研究。研究认为：学院走向民间不仅有利于体育院校武术专业课程设置的特色体现,有利于传统武术的传承及发展,而且还有利于武术学科贴近民间视野进行研究。     

叙事的聚焦与遮蔽——以抗战殉难叙事为例

叙事聚焦与遮蔽决定于叙事立场.以叙事者的心灵之光将对象照亮,充分呈现对象在主体精神观照之下最为闪光的一面,此为聚焦;在主体精神观照之下,或受意识形态规约,将对象本应呈示的一面予以遮挡,让读者或观众无从知晓者,是为遮蔽.本文以抗战时期为国殉难名将的叙事文本为例.分析叙事者在叙事过程中是如何聚焦与遮蔽的.     

中国畜禽粪便养分资源总量及替代化肥潜力

明确畜禽粪便资源数量及养分总量,计算其替代化肥潜力,对指导实现化肥零增长和减施增效具有重要意义.本文研究的畜禽种类包括牛、马、驴、骡、猪、羊、家禽和兔,利用排泄系数法估算了1980-2016年中国畜禽粪便的养分资源总量,并计算畜禽粪便替代化肥潜力.结果显示:①1980-2016年畜禽粪便和养分资源总量呈快速增长—稳定发...     

Factors associated with concussion-symptom knowledge and attitudes toward concussion care seeking in a national survey of parents of middle-school children in the US

Background:Developing appropriate concussion prevention and management paradigms in middle school(MS)settings requires understanding parents’general levels of concussion-related knowledge and attitudes.This study examined factors associated with concussion-symptom knowledge and care-seeking attitudes among parents of MS children(aged 10-15 years).Methods:A panel of 1224 randomly selected U.S.residents,aged ≥18 years and identifying as parents of MS children,completed an online questionnaire capturing parental and child characteristics.The parents’concussion-symptom knowledge was measured using 25 questions,with possible answers being“yes”,“maybe”,and“no”.Correct answers earned 2 points,“maybe”answers earned 1 point,and incorrect answers earned 0 point(range:0-50;higher scores=better knowledge).Concussion care-seeking attitudes were also collected using five 7-point scale items(range:5-35;higher scores=more positive attitudes).Multivariable ordinal logistic regression models identified predictors of higher scores.Models met proportional odds assumptions.Adjusted odds ratios(aORs)with 95%confidence intervals(95%CIs)(excluding 1.00)were deemed statistically significant.Results:Median scores were 39(interquartile range:32-44)for symptom knowledge and 32(interquartile range:28-35)for care-seeking attitude.In multivariable models,odds of better symptom knowledge were higher in women vs.men(aOR=2.28;95%CI:1.71-3.05),white/non-Hispanics vs.other racial or ethnic groups(aOR=1.88;95%CI:1.42-2.49),higher parental age(10-year-increase aOR=1.47;95%CI:1.26-1.71),and greater competitiveness(10%-scale-increase aOR=1.24;95%CI:1.13-1.36).Odds of more positive care-seeking attitudes were higher in white/non-Hispanics vs.other racial or ethnic groups(aOR=1.45;95%CI:1.06-1.99)and in older parental age(10-year-increase aOR=1.24;95%CI:1.05-1.47).Conclusion:Characteristics of middle school children’s parents(e.g.,sex,race or ethnicity,age)are associated with their concussion-symptom knowledge and care-seeking attitudes.Parents’variations in concussion knowledge and attitudes warrant tailored concussion education and prevention.     

Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr1−xNdxCuO2

The microscopic understanding of high-temperature superconductivity in cuprates has been hindered by the apparent complexity of crystal structures in these materials. We used scanning tunneling microscopy and spectroscopy to study the electron-doped copper oxide compound Sr_1−xNd_xCuO₂, which has only bare cations separating the CuO₂ planes and thus the simplest infinite-layer structure of all cuprate superconductors. Tunneling conductance spectra of the major CuO₂ planes in the superconducting state revealed direct evidence for a nodeless pairing gap, regardless of variation of its magnitude with the local doping of trivalent neodymium. Furthermore, three distinct bosonic modes are observed as multiple peak-dip-hump features outside the superconducting gaps and their respective energies depend little on the spatially varying gaps. As well as the bosonic modes, with energies identical to those of the external, bending and stretching phonons of copper oxides, our findings reveal the origin of the bosonic modes in lattice vibrations rather than spin excitations.     

学记的智慧——为师之道

《学记》是一篇概括和总结我国先秦时期教育思想和教育实践的专著,其中蕴含的智慧,时至今日仍具有现实指导意义。尤其关于为师之道的前提、教学原则和策略、师生关系的论述,对今天理解和实践为师之道有许多重要的启发意义,甚至与现象学、解释学哲学思想以及一些现代课程与教学论有异曲同工之妙。