Reviving audience studies     

Jonathan Gray 《Critical Studies in Media Communication》2017,34(1):79-83

Audience measurement data are increasingly central to what many media corporations produce, yet much of these data are inaccessible to scholars. I therefore argue that cultural studies is in need of an audience studies revival. Fan studies continues at strength, but a wider range of audience studies is required to counter and to interrogate the occasional proclamations that companies such as Netflix, Facebook, and Google share with us about audiences and users.  相似文献   

Thriving in the Age of Accelerations: A Brief Look at the Societal Effects of Artificial Intelligence and the Opportunities for Libraries     

Kenning Arlitsch  Bruce Newell 《图书馆管理杂志》2017,57(7):789-798

Fifty years of the compounding effects of Moore's Law have led to enormous advances in computer processing power. Increased network speeds, the availability of big data, and machine learning techniques have accelerated the development of artificial intelligence; this promises to dramatically change many industries, including libraries. This article offers some thoughts on the effects of automation on employment, the social and political fallout, and the threats and opportunities for academic and public libraries.  相似文献   

求解JSP问题的一种自适应遗传算法     

肖力 《鄂州大学学报》2004,11(4):56-58

该文在对车间调度问题进行描述的基础上,提出了一种新的自适应遗传算法,并将其应用于JSP问题.  相似文献   

遗传算法中初始种群与交叉、变异率对解的影响及其解决方案   总被引：13，自引：0，他引：13  

唐世浩  朱启疆 《科技通报》2001,17(3):1-7

本文的研究表明，在相同的遗传算子下，初始种群性状和数量以及交叉、变异率的确定对算法收敛速度和结果的影响不能忽略。初始种群或交叉、变异率选择不当，将增加迭代次数，甚至直接导致算法陷入局部最优解。为此，本文提出一种基于空间分割的遗传算法及初始种群产生和种群数量确定方法，并根据有关文献，提出一种自适应交叉、变异率方法。实际计算表明，该算法在很大程度上避免了算法收敛于局部最优点，取得较好的效果。  相似文献   

浅谈页面置换算法之LRU算法   总被引：1，自引：0，他引：1  

张春红 《廊坊师范学院学报》2006,22(4):76-78

在页式虚拟存储系统中,较常用的页面置换算法有RG、NUR、LFU、OPT、FIFO、LRU,其中LRU算法是一种最通用的有效算法,最接近于理想状态.在实际应用中,LRN算法有多种实现方法,和其它几种页面置换算法相比较存在明显的优点.  相似文献   

构造正则表达式的最佳NFA算法的选择     

袁满  袁真 《番禺职业技术学院学报》2007,6(2):58-61

介绍了工程中广泛应用的四种经典和先进的不确定有限自动机NFA的基本构造方法,它们是位置自动机Apos部分派生自动机Apd,跟随自动机Af,共同跟随集合自动机Acfs。列举大量工程实践中常用和经典的正则表达式,分别用上述自动机算法进行求解实验,对它们的运算尺寸以及与正则表达式尺寸之间的关系,列出表格分别进行比较分析,从中总结出各种自动机的构造特点和最佳应用场合。针对如何根据不同的正则表达式来选择非确定性有限自动机NFA算法提供了重要的参考依据。  相似文献   

Learning sorting algorithms through visualization construction     

Ibrahim Cetin  Christine Andrews-Larson 《Computer Science Education》2016,26(1):27-43

Recent increased interest in computational thinking poses an important question to researchers: What are the best ways to teach fundamental computing concepts to students? Visualization is suggested as one way of supporting student learning. This mixed-method study aimed to (i) examine the effect of instruction in which students constructed visualizations on students’ programming achievement and students’ attitudes toward computer programming, and (ii) explore how this kind of instruction supports students’ learning according to their self-reported experiences in the course. The study was conducted with 58 pre-service teachers who were enrolled in their second programming class. They expect to teach information technology and computing-related courses at the primary and secondary levels. An embedded experimental model was utilized as a research design. Students in the experimental group were given instruction that required students to construct visualizations related to sorting, whereas students in the control group viewed pre-made visualizations. After the instructional intervention, eight students from each group were selected for semi-structured interviews. The results showed that the intervention based on visualization construction resulted in significantly better acquisition of sorting concepts. However, there was no significant difference between the groups with respect to students’ attitudes toward computer programming. Qualitative data analysis indicated that students in the experimental group constructed necessary abstractions through their engagement in visualization construction activities. The authors of this study argue that the students’ active engagement in the visualization construction activities explains only one side of students’ success. The other side can be explained through the instructional approach, constructionism in this case, used to design instruction. The conclusions and implications of this study can be used by researchers and instructors dealing with computational thinking.  相似文献   

Multiobjective optimization and multivariable control of the beer fermentation process with the use of evolutionary algorithms     

ANDRS-TORO B.  GIRN-SIERRA J.M.  FERNNDEZ-BLANCO P.  LPEZ-OROZCO J.A.  BESADA-PORTAS E. 《Journal of Zhejiang University. Science. B》2004,(4)

INTRODUCTIONThefermentationprocesshasgreatscientificandpracticalimportance.Forseveralreasons,qua-litycontrol,forexample,itisimportanttoincludeallkindsoftechnologicaladvancesintheindustrialprocesses.Thisisthemainaimofourresearch,whichisverycomplexduetothenon-linearityofthestudiedphenomena.Themathematicalmodelsfoundinliteratureincludeonlylaboratoyconditions.Amathematicalmodelhasbeendevelopedforthebeerfermentationprocessbecauseoftheadvantagesthatitprovides.Itallowssimulatingwhatcanhappenwhe…  相似文献   

遗传算法在自动组卷应用中的分析与比较     

邓蕴 《北京工业职业技术学院学报》2008,7(4):24-29

针对遗传算法在自动组卷中的应用,总结了三种以遗传算法为基础的自动组卷解决方案,就遗传算法中的参数编码、初始群体的设定、适应度函数的设计等核心内容,进行了分析和比较,并提出结论。  相似文献   

计算机在一元回归分析中的应用     

王秀梅 《商丘师范学院学报》2001,17(6):58-63

探讨了利用计算机进行一元回归分析的基本方法，设计了求一元回归预测模型的算法，并用QBASIC语言编写计算机程序。  相似文献