浅圆仓侧压力分析     

原方  范量  高新南 《东南大学学报》2004,20(3):356-359

Rankine理论和Coulomb理论均不适合用于浅圆仓的侧压力计算. 基于此, 本文研究了浅圆仓散料侧压力的实际分布规律及计算方法. 根据极限平衡理论, 首先得到散粒体作用在单位周长的仓壁上的合压力, 然后通过严格的数学推导, 得到浅圆仓侧压力的分布规律. 结果表明, 本文结果与实仓试验结果相符, 说明本文公式不论对平堆还是锥堆都比较适合, 而Rankine理论和Coulomb理论用于浅圆仓均有缺陷.  相似文献   

加强农村公共管理推进和谐农村的构建     

钟立华 《江西教育学院学报》2007,28(5):14-16,45

乡镇行政机构臃肿,行政制度供给过剩,农村公共教育体制、农村社会保障体制不符合国家管理的一般规律,制约着和谐农村的构建。因此必须加快乡镇机构、农村教育体制、农村公共卫生、农村医疗保健等各方面的改革步伐,统筹城乡发展,缩小城乡差距,实现构建和谐农村的伟大目标。  相似文献   

A channel distortion model for video over lossy packet networks     

Cheng Jian-xin  Gao Zhen-ming  Zhang Zhi-chao 《浙江大学学报(A卷英文版)》2006,7(1):48-53

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.  相似文献   

英语课程改革理念探究     

耿霞  王丽华 《焦作大学学报》2003,17(4):103-104

章主要阐述基础教育课程改革所倡导的活动式教学方法的特点和优越性，并探讨了如何在英语教学中采用活动式教学方法。  相似文献   

生命在于运动的理性思考     

周立华 《周口师范学院学报》2004,21(2):87-89

主要从生命的起源与发展,人类生命的可持续发展与运动的辩证关系等方面,探讨生命在于运动的哲理,从而对运动有更客观的认识.  相似文献   

Effects of environmental intervention on sedentary time,musculoskeletal comfort and work ability in office workers     

Ying Gao  Nina Nevala  Neil J. Cronin  Taija Finni 《European Journal of Sport Science》2016,16(6):747-754

Sit–stand workstations offer a potential strategy to reduce prolonged occupational sitting. This controlled intervention study examined the effects of an environmental intervention on occupational sedentary time, musculoskeletal comfort and work ability, and the usability of sit–stand workstations in office work via a self-reported questionnaire. The intervention group (n?=?24) used sit–stand workstations during the 6-month intervention period, and the control group (n?=?21) used traditional sitting workstations. The results showed that working at sit–stand workstations can reduce sitting time significantly compared to control workstations (?6.7% vs. 5.0%, p?=?.019), which is reallocated mostly to standing (r?=??0.719, p?p?=?.028), as well as work ability (p?=?.022). The majority of intervention subjects rated sit–stand workstation adjustability as good (83.3%), and 75.0% were satisfied with the workstation. About 41.7% of the intervention participants, who were exclusively female, used the sit–stand function on a daily basis. While the environmental change alone was effective, it is likely that promoting the daily use of sit–stand workstations with counselling would lead to even more substantial positive effects.  相似文献   

大学修辞教学改革初探     

王丽华 《集美大学学报(教育科学版》2001,2(1):71-73

大学修辞教学要达到教学大纲的要求,必须打破“辞格中心论”,突破句子的分析界限,使大学生摆脱旧的修辞观念的束缚。同时,还应当注意教学方法的多样化,才能使大学生的语言交际能力得到全面提高。  相似文献   

关于现行监理制实施的探讨     

李春前  齐伟军  高宏琴 《鸡西大学学报》2001,(4)

针对工程建设监理实施中存在的问题,提出当前监理工作的对策和工作模式.  相似文献   

氢化丁腈橡胶的应用与研究进展   总被引：8，自引：0，他引：8  

尹海川  韦薇  高诚伟 《楚雄师范学院学报》2002,17(3):61-62

本文评述了氢化丁腈橡胶（HNBR）的应用及进展，指出了我国发展氢化丁睛橡胶的潜力。  相似文献   

广义线性系统极点配置的方法     

杨战民  刘利华  谭宏武  王社宽 《咸阳师范学院学报》2004,19(2):5-7

研究了广义线性系统的极点配置问题，利用矩阵的奇异值分解和矩阵的广义逆得到了广义线性系统的奇异值标准形，使得广义线性系统的极点配置问题转变为正常系统的极点配置问题，从而给出广义线性统极点配置的一种新方法。  相似文献