信息与计算科学专业学生自主学习能力培养的思考

时代的变迁对于信息与计算科学专业提出了更多的要求,基于此,笔者结合教育部对于本专业的新要求,分析了什么是学生的自主学习能力,并在此基础上剖析了培养学生自主学习能力的重要性,进而具体的提出了培养本专业学生自主学习能力的措施。     

人文素质教育下我国高校冬季体育课程设计与教学方法

高校冬季体育课程存在跟不上《纲要》要求和精神,未能与人文教育有机结合,重教轻育,甚至边缘化等问题.人文素质教育理念下的冬季体育课程设计和冬季体育课程教学方法,需要具备一定的开创精神和创新意识,并始终贯穿到冬季体育课程设计和教学实践之中.高校冬季体育课要彰显人文素质教育观念,构建生命化教育平台,重视培育大学生必备的信念和克服困难的勇气等人文素质的教育过程.结合我国北方高校冬季体育基本现状,在分析制约因素的基础上提出课程设计三原则与拓宽冬季体育教学方法四个维度的建议.     

基于平方法的雷达信号脉内调制粗识别

为了能够简单快速识别出雷达信号脉内调制类型,提出了一种简单高效的调制类型粗识别方法。首先对输入信号进行平方处理,经FFT变换得到其频谱并计算出平方后的信号3d B带宽,最后将平方后的信号3d B带宽与阈值比较,粗识别出调相信号和调频信号。仿真结果表明,该方法使输入信号的频谱特征更加明显,验证了该方法的有效性和实用性。     

黑龙江八一农垦大学人工湖原生动物种类构成及水质评价

采用PFU法和直接取水法对黑龙江八一农垦大学校园人工湖内原生动物的种类构成进行研究,结合Margalef多样性指数等各项指标对水质进行评价。     

基于等标污染负荷法的工业废水污染源分析与评价——以绵阳市为例

对2013年绵阳市工业废水污染源及其污染物的年排放量进行了调查,并采用等标污染负荷法对其进行评价,分析了绵阳市的水污染特征.结果表明,绵阳市的主要工业污染物为COD、氨氮和石油类,主要工业废水污染源有24家企业,黑色金属铸造业废水污染源排列首位.该研究结果可为绵阳市的水环境保护及污染源总量控制提供科学、合理的依据.     

圆管分层两相流问题的解析方法

管道输运工程中经常遇到两相流问题,因此需要预测对流体施加的压力大小以指导运输。拟对圆直管道分层两相流-层流模型做研究,用解析方法计算出圆管任一截面处流体的速度分布,并验证两层流体交界面处的摩擦力与其平均速度差值呈近似线性关系的结论。以此为基础,可以通过计算截面速度分布得到流体与管壁的摩擦力,通过输运流体所需达到的速度得到分界面处摩擦力,最终反推出运输流体所需要施加的压力差大小。     

随机变系数线性结构关系EV模型的参数估计

利用随机加权正交回归最小二乘法给出了随机变系数线性结构关系EV模型中的参数估计。     

浅谈高等数学与工程数学的区别与联系

本文通过概述高等数学和工程数学的相关内容,阐述了二者在实际应用中的重要性,并通过简单的例子来说明二者的区别与联系,进一步证明了二者存在的意义。     

Indoor air quality risk assessment on the Canadian campus by a multilevel integrated weighted average method

Increasing incidents of indoor air quality (IAQ) related complaints lead us to the fact that IAQ has become a significant occupational health and environmental issue. However, how to effectively evaluate IAQ under different scale of multiple indicators is still a challenge. The traditional single-indicator method is subjected to uncertainties in assessing IAQ due to different subjectivity on good or bad quality and scalar differences of data set. In this study, a multilevel integrated weighted average IAQ method including initial walking through assessment (IWA) and two-layers weighted average method are developed and applied to evaluate IAQ of the laboratory building at the University of Regina in Canada. Some important chemical parameters related to IAQ in terms of volatile organic compounds (VOCs), methanol (HCHO), carbon dioxide (CO2), and carbon monoxide (CO) are evaluated based on 5 months continuous monitoring data. The new integrated assessment result can not only indicates the risk of an individual parameter, but also able to quantify the overall IAQ risk on the sampling site. Finally, some recommendations based on the result are proposed to address sustainable IAQ practices in the sampling area.     

Calculating method of contact stress for non-circular gears

According to Hertz theory, the difference of contact stress for non-circular gears and equivalent gears is compared in the paper, a calculating method of contact stress for non-circular gears by using equivalent gears is researched, and computing formulas of power and rotation speed for equivalent gears are deduced. A numerical simulation of contact stress for non-circular gears has also been conducted based on the finite element method. By the comparison of fitting curves, the feasibility of using equivalent gears instead of non-circular gears to calculate the contact stress is testified.