用Microsoft Excel软件处理物理化学实验数据     

刘云珍  陈顺玉 《福建师大福清分校学报》2011,(2):20-27

Microsoft Excel软件是一种图表功能强大的计算机数据处理软件。应用Excel程序处理物理化学实验数据可使原本复杂的数据处理过程变得简单、快捷,同时还可避免因手工绘图而引入的误差,提高实验结果的准确度和精确度。本文通过介绍几个典型的物理化学实验数据处理过程来说明如何利用Excel软件快速地处理物理化学实验数据。  相似文献   

Disseminating the right information to the right audience: cultural determinants in the use (and misuse) of rankings   总被引：1，自引：0，他引：1  

Leon Cremonini  Don Westerheijden  Jürgen Enders 《Higher Education》2008,55(3):373-385

Rankings and league tables, or Report Cards (RCs), of Higher Education Institutions have become a global phenomenon. Their purpose, it is claimed, is to help “student-consumers” make informed decisions. Yet the degree to which RCs succeed in helping students in their college choice is disputed. Even though RCs are intended for all, which information is sought and how it is used may differ between potential students hailing from different social, economic and cultural backgrounds. In particular, RCs may neglect certain cultural determinants that influence students’ college choice behaviour. The article reviews the literature on the cultural determinants of college choice and especially the use of RCs in the ambit of cultural determinants. In the United States, possibly because of evident educational gaps between ethnic groups in society, the issue of cultural perceptions in college choice has been addressed, albeit scantly. In Europe, this field of study is virtually non-existent, despite increasing indications that second and third generation immigrants still lag behind in terms of higher education participation and graduation rates.

Jürgen EndersEmail:

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两个加工时间恶化的半线性平行机排序问题的启发式MBLS 算法     

程明宝  孙世杰 《上海大学学报(英文版)》2007,11(5):451-456

The combination of online or semi-online with deterioration jobs has never been researched in scheduling problems. In this paper, two semi-online parallel machine scheduling problems with linear deterioration processing time are considered. In the first problem, it is assumed that the deterioration rates of jobs are known in an interval, that is, bj ∈[0, α], where 0 〈α≤ 1 and bj denotes the linear deterioration rate. In the second problem, it is assumed that the largest deterioration rate of jobs is known in advance, that is, b = max1≤j≤n {bj }. For each of the two problems, a heuristic MBLS algorithm is worked out and its worst-case ratio is analyzed. At the same time, the worst-case ratio of the list （LS） algorithm is investigated and it is proved that all the ratios are tight.  相似文献   

浅议高职院校学籍处理的程序     

马涛  李连凯  宫永纯 《辽宁高职学报》2008,10(8):102-103

高校学生学籍处理,是根据学生在校学习成绩,对学生的学籍进行异动的管理,这是高校学生学籍管理实施细则中一个重要部分。在此,就高职院校学籍处理程序提出几点建议,以更好地为学生管理、教学管理服务。  相似文献   

Time allocation scheme in IEEE 802.15.3 TDMA mechanism   总被引：1，自引：0，他引：1  

LIU Xin  DAI Qiong-hai  WU Qiu-feng 《浙江大学学报(A卷英文版)》2006,7(Z1)

In network with a shared channel in TDMA mechanism, it is a core issue to effectively allocate channel time to provide service guarantees for flows with QoS requirements. This paper proposes a simple and efficient time allocation scheme called MES-ESRPT (MCTA at the End of Superframe-Enhanced Shortest Remaining Processing Time) for delay-sensitive VBR traffic in accordance with IEEE 802.15.3 standard. In this algorithm, PNC (piconet coordinator) allocates one MCTA (Management Channel Time Allocation) for each stream which is the process of communication at the end of superframe. During the MCTA period, each transmitter should report current fragments number of the first MSDU (MAC Service Data Unit) and the fragments number of the remainder MSDUs to PNC. In the next superframe, PNC firstly allocates part CTAs (Channel Time Allocation) for each stream based on the remainder fragments number of the first MSDU by SRPT rule, then allocates remainder CTAs for each stream based on all fragments number of remainder MSDUs by the same SRPT rule. Simulation results showed that our proposed MES-ESRPT method achieves significantly better performance in QoS for multimedia streams compared to the existing schemes.  相似文献   

材料成型及控制工程专业“导入式”生产实习的探索与思考     

龚攀  王新云  樊自田  邓磊  金俊松  宋波  刘鑫旺 《中国现代教育装备》2020,(9):120-122

基于华中科技大学材料成型与控制工程专业近年来开展本科生生产实习工作获得的经验,提出了基于目标导向、需求导向、问题导向的"导入式"生产实习模式,以感染激励、榜样激励、召唤激励的方式探索实施,通过保持感染热度、感佩浓度、感召力度,确保短暂的实习能够有实效、见长效。"导入式"生产实习模式可为工科专业生产实习工作的开展提供一定的借鉴。  相似文献   

Learning design and learning analytics in mobile and ubiquitous learning: A systematic review     

Gerti Pishtari  María J. Rodríguez-Triana  Edna M. Sarmiento-Márquez  Mar Pérez-Sanagustín  Adolfo Ruiz-Calleja  Patricia Santos  Luis P. Prieto  Sergio Serrano-Iglesias  Terje Väljataga 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1078-1100

Mobile and Ubiquitous Learning (m/u-learning) are finding an increasing adoption in education. They are often distinguished by hybrid learning environments that encompass elements of formal and informal learning, in activities that happen in distributed settings (indoors and outdoors), across physical and virtual spaces. Despite their purported benefits, these environments imply additional complexity in the design, monitoring and evaluation of learning activities. The research literature on learning design (LD) and learning analytics (LA) has started to deal with these issues. This paper presents a systematic literature review of LD and LA, in m/u-learning. Apart from providing an overview of the current research in the field, this review elicits elements of common ground between both communities, as shown by the similar learning contexts and complementary research contributions, and based on the research gaps, proposes to: address m/u-learning beyond higher education settings, reinforce the connection between physical and virtual learning spaces, and more systematically align LD and LA processes.  相似文献   

基于视频的车辆违章越线行为检测方法研究     

洪琦  沙新华 《深圳信息职业技术学院学报》2005,3(3):12-16

本文介绍了一种基于视频的车辆违章越线行为识别方法.该方法首先利用帧数统计判断当前图像的车道线边界状态,然后根据车道线的不同状态分别采用检测车前部的均匀灰度区域和检测车头复杂边界信息的方法来实现车辆的越线检测.实验结果表明该方法是有效的.  相似文献   

溶液法测定极性分子偶极矩的数据处理方法   总被引：2，自引：0，他引：2  

玉占君  任庆云  张婷婷 《实验技术与管理》2007,24(8):32-34

以Visual Basic6．0语言为工具，采用最小二乘法直线拟合进行数据处理，研制了溶液法测定极性分子偶极矩实验的数据处理软件，能得到科学、正确的数据处理结果并打印出图形，为教师批改实验报告提供可靠的依据。  相似文献   

Evaluation and publication delay in Ibero-American scientific journals     

Jon Zabala  Borja González-Albo  Ana García-García  Aurora Garrido-Domínguez  José Ignacio Vidal-Liy  Luis R. Álvarez-Díez  Soledad Hernando-Tundidor  Yara Mostazo-Fernández  Teresa Abejón 《Learned Publishing》2023,36(2):205-216

This article analyses the review, acceptance and publication dates of a sample of 21,890 articles from 326 Ibero-American scientific journals from all subject areas and countries included in the Latindex Catalogue 2.0 and published between 2018 and 2020 (freely available as an open access dataset). The aim is to discover evaluation and publication times. The evaluation process takes a median of 110 days, the publication process, a median of 82 days, and the whole process, a median of 224 days. Statistical differences are found according to periodicity, subject areas, countries, existence of a printed version and article type (Call for Papers or General articles). From the data we find that the delay in publication is longer than publishers themselves report to the DOAJ. STEM areas present the most similarity in publication patterns, having a higher number of evaluation days (Ed) than publication days (Pd); Arts and Humanities present the opposite pattern, with a higher Pd than Ed. In the case of Social Sciences, the times are similar. General articles and Call for Papers articles differ in terms of Ed, but not Pd, indicating that Call for Papers revisions are faster.  相似文献