新课程下历史课堂和谐师生关系初探

师生关系是历史课堂上最基本的一对关系,其融洽和谐与否直接关系着历史课堂教学目标的实现.然而,在现实的教学中,这对关系往往存在着一定的不和谐因素.     

影响远程教育交互的因素分析

随着远程教育的发展,交互问题日益受到重视,从各个方面探讨交互的文章层出不穷,本文就影响远程教育中交互的因素进行分析,从科技文化、人员特征以及支撑环境三个方面着眼,综合所有因素,以期全面的了解远程交互的影响关系,为更好的开展远程教学打下基础。     

对话教学中和谐师生关系的构建

教学活动实质是人与文对话的活动，即教师、学生与教学文本的情景性、体验性和生成性的对话。对话教学中和谐师生关系的表现形态应该是：平等互动的理解关系；开放共生的融合关系；启迪共悟的智慧关系。     

对大学英语词汇教学的若干理论思考

词汇是语言大厦的基础。在英语教学中，词汇教学至关重要，要针对当前存在的问题，改进教学方法，注重示范引导，帮助学生有效地学习掌握词汇，不断扩大词汇量，进而提高英语运用能力。     

Accelerometer data requirements for reliable estimation of habitual physical activity and sedentary time of children during the early years - a worked example following a stepped approach

This study presents a worked example of a stepped process to reliably estimate the habitual physical activity and sedentary time of a sample of young children. A total of 299 children (2.9 ± 0.6 years) were recruited. Outcome variables were daily minutes of total physical activity, sedentary time, moderate to vigorous physical activity and proportional values of each variable. In total, 282 (94%) provided 3 h of accelerometer data on ≥1 day and were included in a 6-step process: Step-1: determine minimum wear-time; Step-2: process 7-day-data; Step-3: determine the inclusion of a weekend day; Step-4: examine day-to-day variability; Step-5: calculate single day intraclass correlation (ICC) (2,1); Step-6: calculate number of days required to reach reliability. Following the process the results were, Step-1: 6 h was estimated as minimum wear-time of a standard day. Step-2: 98 (32%) children had ≥6 h wear on 7 days. Step-3: no differences were found between weekdays and weekend days (P ≥ 0.05). Step-4: no differences were found between day-to-day variability (P ≥ 0.05). Step-5: single day ICC’s (2,1) ranged from 0.48 (total physical activity and sedentary time) to 0.53 (proportion of moderate to vigorous physical activity). Step-6: to reach reliability (ICC = 0.7), 3 days were required for all outcomes. In conclusion following a 7 day wear protocol, ≥6 h on any 3 days was found to have acceptable reliability. The stepped-process offers researchers a method to derive sample-specific wear-time criterion.     

词义发展的方式

在关于词义发展的问题上，前人已做过大量的工作。传统的研究都是从单个词意义的引申着手，认为词义的发展变化都是由个别词孤立的引申而来。在这个问题上，许嘉璐、孙雍长和蒋绍愚三位先生给出了不同的看法。本文就是对这三位先生的观点的一个比较分析。     

启发式教学新释

启发式和注入式是教学过程中两种基本形式,既相互对立相互区别,又相互补充相互促进。启发式教学之奥妙在于灵活地运用“引子”。     

中原武术非物质文化遗产传承中的网络化应用研究

互联网+时代的到来为中原武术非物质文化遗产的保护与传承提供了新的契机与平台。中原武术充分结合市场网络化、服务网络化、技术网络化和传播网络化的社会特征,建立中原武术非物质文化遗产大数据,进行数字化技术开发,构建全方位的数字化传播平台,积极实施网络化市场应用,促进中原武术的可持续、健康发展。     

为了智慧的生长——幼儿园课程的特质与旨归

幼儿园课程的特质与旨归是为儿童的智慧生长提供机会,让儿童学会用智慧统领知识.要提升幼儿园课程的实施智慧,就要对儿童进行再发现和再认识.儿童是幼儿园课程的永恒主语.幼儿园课程应该关注幼儿园中的儿童、教师心里的"儿童"和课程内容中隐藏的"儿童",让这三个"儿童"在幼儿园课程中相遇、交谈,共同建构幼儿园课程的实施情境,并在情境中实现共同发展.     

A channel distortion model for video over lossy packet networks

Error-resilient video communication over lossy packet networks is often designed and operated based on models for the effect of losses on the reconstructed video quality. This paper analyzes the channel distortion for video over lossy packet networks and proposes a new model that, compared to previous models, more accurately estimates the expected mean-squared error distortion for different packet loss patterns by accounting for inter-frame error propagation and the correlation between error frames. The accuracy of the proposed model is validated with JVT/H.264 encoded standard test sequences and previous frame concealment, where the proposed model provides an obvious accuracy gain over previous models.