电子书用户使用意愿影响模型构建与实证     

杨方铭  张志强 《图书情报工作》2020,64(9):85-94

[目的/意义] 探究用户使用电子书意愿的影响因素，以有助于电子书产业走出缓慢的发展困境。[方法/过程] 以UTAUT2、使用满足理论为基础，从需求满足和外部情景因素两个层面构建影响因素模型，并将需求满足细化为内容需求、社交互动需求和休闲娱乐需求3个测量变量。采用问卷调查方法收集有效样本1 013份，使用AMOS21软件对模型进行验证。[结果/结论] 研究发现，需求满足、阅读习惯、价格价值、社会影响对使用意愿有正向影响作用，而激励措施对使用意愿有负向影响作用，努力期望对使用意愿的影响不显著，并依据研究结果提出促进电子书产业发展的建议。  相似文献   

老年人太极拳锻炼行为及其对健康的影响     

王莉华  张樱 《南京体育学院学报(社会科学版)》2020,34(6):79-85

采用文献资料法、问卷调查法和数理统计法等，选取江苏省具有代表性的城区(南京、苏州、徐州) 参与太极拳习练的老年群体为调查对象，对其人口学指标、习练行为、健康状况等进行研究，揭示老年人习练太极拳的行为特征及其对健康的影响，发挥太极拳在改善老年人健康、实现健康老龄化中的功能与价值。 ①在习练行为特征上，90.3%的老年人每周习练频次为3次及以上，82.4%的老年人每次习练时长在30min及以上；学习途径和习练方式都以“群体组织”形式为主；习练套路以24式为主；②在健康状况自评上，参与太极拳习练的老年人85.8%对健康状况满意，且练习太极拳对改善老年人健康状况具有“全面性”特征；③在影响习练太极拳老年人健康评价的因素上，教育程度、收入满意度和每次习练时长、习练方式，以及掌握习练要领的数量等因素显著影响参与太极拳习练的老年人对自身健康的评价，且与评价结果具有正相关性。  相似文献   

Impact of combining data from multiple instruments on performance of patient-based real-time quality control     

Qianqian Zhou  Tze Ping Loh  Tony Badrick  Chun Yee Lim 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(2)

IntroductionIt is unclear what is the best strategy for applying patient-based real-time quality control (PBRTQC) algorithm in the presence of multiple instruments. This simulation study compared the error detection capability of applying PBRTQC algorithms for instruments individually and in combination using serum sodium as an example.Materials and methodsFour sets of random serum sodium measurements were generated with differing means and standard deviations to represent four simulated instruments. Moving median with winsorization was selected as the PBRTQC algorithm. The PBRTQC parameters (block size and control limits) were optimized and applied to the four simulated laboratory data sets individually and in combination.ResultsWhen the PBRTQC algorithm were individually optimized and applied to the data of the individual simulated instruments, it was able to detect bias several folds faster than when they were combined. Similarly, the individually applied algorithms had perfect error detection rates across different magnitudes of bias, whereas the error detection rates of the algorithm applied on the combined data missed smaller biases. The performance of the individually applied PBRTQC algorithm performed more consistently among the simulated instruments compared to when the data were combined.DiscussionWhile combining data from different instruments can increase the data stream and hence, increase the speed of error detection, it may widen the control limits and compromising the probability of error detection. The presence of multiple instruments in the data stream may dilute the effect of the error when it only affects a selected instrument.  相似文献   

船舶空调热舒适控制策略     

刘红敏  龚志豪  王一初  徐斌 《上海海事大学学报》2019,40(4):78-82

针对传统船舶空调PID控制动态性能和抗干扰能力弱的缺点,设计一种将PID控制与模糊理论相结合的模糊PID控制。利用MATLAB,分别对传统的PID控制、模糊控制和模糊PID控制进行仿真比较,发现模糊PID控制具有控制精度高、超调小、波动小、动态响应快的特点。船舶航行于复杂的环境中,舱室内热舒适温度随着外界环境变化需不断调整,对船舶空调温度控制系统采用模糊PID控制可以精确、快速地使船舶舱室达到热舒适的状态。  相似文献   

Applying user analytics to uses and effects of social media in China     

Jonathan J. H. Zhu  Yixin Zhou  Lu Guan  Lei Hou  Anqi Shen  Heng Lu 《亚洲交流杂志》2019,29(3):291-306

ABSTRACT

We introduce what user analytics can do in the first half of the paper and then illustrate how to do user analytics in the second half. In the current context, user analytics refers to a set of diverse communication research methods on uses and effects of social media. User analytics has evolved from TV ratings research to online user research. The history illustrates what data sources, measures, and analyses can be used for what types of research questions under user analytics. We discuss the similarities of and differences between user analytics and other methods of computational communication research (e.g. content mining and online experiments), and compare the strengths and weaknesses of user analytics with traditional quantitative methods (e.g. survey). Finally, we present an application study of Chinese bloggers to demonstrate how to employ user analytics methods to study the production, consumption, and effects of user-generated content.  相似文献   

警察院校武术课程防卫控制技术训练与心理干预探析     

杨飞  董艳芳 《体育科技文献通报》2020,(5):60-61,72

社会治安问题的加剧,警察院校学生的实战技能逐渐在加强,大力开展防卫控制技能是很多警察院校重点培养后备人民警察的重要举措,通过课程的开展达到强健体魄,防身自卫,安全执法的目的。本文通过文献资料法、社会调查法,专家访谈法,对几所警察院校《防卫控制技术》课程开设情况以及学生的心理情况进行调查,分析并指出了当前防卫控制技能教学存在的主要问题,为以后更好地开展这门课程,培养更多的优秀学生提供一点参考。  相似文献   

Social media and students’ behavioral intentions to enroll in postgraduate studies in Kenya: a moderated mediation model of brand personality and attitude     

Gabriel Simiyu  Ronald Bonuke  Joyce Komen 《Journal of Marketing for HIGHER EDUCATION》2020,30(1):66-86

ABSTRACT

Using cross-sectional data from 504 students from four Kenyan universities, this study evaluates the indirect effect of brand personality on the relationship between social media and students’ behavioral intentions to enroll in postgraduate studies. Additionally, the study examines the moderating effect of attitude on the relationship between social media and brand personality, social media and students’ behavioral intentions, brand personality and students’ behavioral intentions. Finally, it investigates the moderating effect of attitude on the indirect process of brand personality on the relationship between social media and students’ behavioral intentions. The study is guided by the Theory of Planned Behavior, Technology Acceptance Model and Self Congruity Theory. Process Macro is used to analyze data. Results indicate that social media significantly predicts students’ behavioral intentions and this relationship is partially mediated by brand personality. Besides, attitude moderates the relationship between social media and students’ behavioral intentions and also the relationship between brand personality and students’ behavioral intentions. Finally, attitude has a conditional effect on the indirect relationship between social media and student’s behavioral intentions via brand personality and this effect is much stronger with a higher level of attitude. These findings contribute new knowledge to literature and theory.  相似文献   

Assessing Determinants of Perceived Ease of Use of Institutional Repositories by Lecturers in Nigerian Universities     

Alice A. Bamigbola  Airen E. Adetimirin 《International Information and Library Review》2020,52(2):95-107

Abstract

Institutional repositories (IRs) present platform to disseminate research findings to complement the traditional scholarly communication model. The use of IRs is beneficial to authors, host institutions, libraries and society at large. Despite the numerous benefits of IRs, there is low deposit of scholarly works by lecturers and the investment on IRs seems to be a waste. This study examined determinants of perceived ease of use (PEOU) of IRs by lecturers in Nigerian universities. A survey of lecturers received 857 respondents. Awareness, anchor and adjustment factors were found to be determinants of PEOU of Institutional repositories by lecturers in Nigerian Universities.  相似文献   

基于短时交通流量预测对路网微观交通仿真的研究     

张虎 《苏州市职业大学学报》2021,(1)

针对早高峰短时交通流量预测数据少、波动大的特点,提出用灰色模型进行预测。将灰色GM(2,1)改进为灰色GM(2,1,λ,ρ)预测模型,以提高预测精度。针对粒子群算法(PSO)的早熟现象,将Logistic混沌搜索嵌入到PSO算法,应用混沌粒子群算法(CPSO)寻找灰色GM(2,1,λ,ρ)预测模型最优的参数λ和ρ。结合两者提出了基于CPSO–GM(2,1,λ,ρ)的早高峰短时交通流预测模型。利用VISSIM对研究路网进行微观交通仿真,通过VISSIM–Excel、VBA–Matlab平台实现了短时交通流量预测和路网微观交通仿真数据的交互,对集成交通控制系统的架构进行了方案设计。仿真结果表明,结合流量预测的路网优于固定信号配时下的路网仿真。  相似文献   

高职教育引企入校质量监控体系探究     

李宏葱 《番禺职业技术学院学报》2011,10(4):8-11

引企入校,开展工学结合教育工作是高职培养面向生产、建设、服务和管理第一线高技能人才的重要环节。目前高职教育在引企入校的过程中出现了各种问题,造成引企入校合作流于形式,合作质量不高。其原因在于,高职院校引企入校前,没有建立较完善的质量监控体系,而构建此体系才是解决问题的良方。  相似文献