以"能力为本位"的BTEC人才培养模式探析

BTEC是国际性权威教育机构英国Edexcel(爱德思 )国家学历即职业资格考试委员会目前积极推介的创新人才培养模式。它把学生掌握通用能力和专业能力作为人才培养的目标 ,在教学过程中重视学生的学习能力、实践能力和外语能力的培养 ,以课业代替传统的考试方法 ,培养的人才普遍受到国际上雇主的欢迎。本文希望通过对BTEC人才培养模式的探析 ,对我国高等职业技术教育改革有所启示 ,有所裨益     

视频技术的发展背景

通过模拟与数字之争及市场机遇与技术支持的阐述推出视频技术的发展背景.     

关于社区教育及其有关问题的探讨

本文从社区教育发展的实践中,阐述社区教育的特点、意义和作用,提出社区教育应以加强社区的思想道德建设,尤其是应以加强对青少年的思想道德教育为中心任务。     

A novel algorithm for Ethernet-passive-optical-network dynamic bandwidth allocation based on threshold

The Ethernet passive optical network (EPON) is the next generation of broad-band network technique. A crucial issue in EPONs is the sharing of uplink bandwidth among optical network units (ONUs). This article provides a novel dynamic bandwidth allocation algorithm, i.e. threshold dynamic bandwidth allocation (TDBA), which is based on adaptive threshold, to increase resource utilization. The algorithm uses ONU data-transmitting rate to adjust optical line terminal (OLT) receiving data threshold from an ONU. Simulation results show that this algorithm can decrease average packet delay and increase network throughput in a 10G EPON system.     

单位行贿罪若干问题研究

单位行贿罪的主体复杂多样,包括一人公司、合伙企业、个人挂靠型企业、风险经营型企业、承 包企业等,这几种特殊的企业形式能否成为单位行贿罪的主体是该类犯罪定性的关键;"情节严重" 是该罪客观行为方式的共同构成要件;该罪与对公司、企业人员行贿罪、单位受贿罪之间存在刑罚 配置不协调的问题,应当通过完善刑事立法予以修正.     

Optimal sampling frequency in recording of resistance training exercises

The purpose of this study was to analyse the raw lifting speed collected during four different resistance training exercises to assess the optimal sampling frequency. Eight physically active participants performed sets of Squat Jumps, Countermovement Jumps, Squats and Bench Presses at a maximal lifting speed. A linear encoder was used to measure the instantaneous speed at a 200 Hz sampling rate. Subsequently, the power spectrum of the signal was computed by evaluating its Discrete Fourier Transform. The sampling frequency needed to reconstruct the signals with an error of less than 0.1% was f_99.9 = 11.615 ± 2.680 Hz for the exercise exhibiting the largest bandwidth, with the absolute highest individual value being 17.467 Hz. There was no difference between sets in any of the exercises. Using the closest integer sampling frequency value (25 Hz) yielded a reconstruction of the signal up to 99.975 ± 0.025% of its total in the worst case. In conclusion, a sampling rate of 25 Hz or above is more than adequate to record raw speed data and compute power during resistance training exercises, even under the most extreme circumstances during explosive exercises. Higher sampling frequencies provide no increase in the recording precision and may instead have adverse effects on the overall data quality.     

船闸阻抗影响下的内河航线非线性配船模型

为得到可靠的最优航线配船方案,从内河繁忙航线上船舶过闸的时间开始研究,得出船舶经过船闸处时间变动与航线配船数量的关系;在线性规划的航线配船模型基础上,建立受船闸时间阻抗变动影响的航线非线性配船模型.应用该模型,设计某一内河航运船队的最优配船方案.分析表明,该非线性模型考虑的影响因素更全面,运用该模型得到的配船结果比线性规划模型更合理.     

向大学生布置体育课外作业势在必行

由于受“应试教育”的影响,目前大学生的体育素质较差,高校体育课每周只有一次,难以完成教学任务。向大学生布置课外体育作业,是教师根据学生的体育基础、兴趣与爱好,有目的、有计划地让学生在课余时间进行体育锻炼。它是体育教学的补充与提高,也是督促学生进行自觉锻炼的一项措施。     

电大开放教育中毕业作业的课程化转型初探

将毕业作业课程化是纠正开放教育毕业实践环节出现的形式化倾向的出路。电大开放教育毕业实践环节,在一定程度上存在着指导理念不严谨,运作模式不合理,资源系统不支持和管理机制不完善的弊端,"毕业作业课程化"在一定程度上、一定范围内可以解决由此带来的相关问题并以课程化的思路提出课程设计方案。     

改进的移动商务身份认证方案设计

本文对移动电子商务系统进行了探讨和分析,并针对移动通信的终端设备多以计算能力相对较弱,存储量小的智能卡为主的特点,基于椭圆曲线密码体制,提出了适用于移动电子商务的一种改进的TDAKA(双向认证与密钥协商)协议,同以往方案做了比较,并对该方案的安全性和计算复杂性进行了分析。该协议有以下特点:实现了网络和用户的双向认证;采用数字签名,用户对业务具有不可否认性;由于利用椭圆曲线公开密钥密码算法,使得在同样的安全水平下,可以减小密钥长度,加快计算速度,适应移动通信系统环境。