一阶扩展Cooper变换改进型

提出一种一阶扩展A型Cooper变换改进型模式,用结构归纳法证明了其正确性,并给出应用示例。     

基于用户自然标注的TF-IDF辅助标引算法及实证研究

[目的/意义] 从用户角度出发,研究基于用户自然标注的TF-IDF辅助标引算法。[方法/过程] 首先以核心期刊论文中作者标注的关键词和分类号为源数据,通过对关键词词频进行统计,使用TF-IDF算法构建用户标注词表、形成标引知识库,然后通过IK Analyzer分词软件对待标引的科技项目数据进行切词和停用词处理,进而使用TF-IDF算法和位置加权算法提取科技项目数据的特征词,最终实现对科技项目数据进行关键词和分类的同步标引。[结果/结论] 实验结果表明,机标关键词与人标关键词的相似比在60%以上的科技项目数据占总数的68.1%,机标分类号与人标分类号前三位一致的占总数的83.9%,结果表明基于用户自然标注数据并采用TF-IDF算法在关键词和分类标引方面是可行的。     

基于词向量扩展的学术资源语义检索技术

[目的/意义] 尝试以统计的方法为指导思想,探究基于词向量扩展的语义检索技术来提升学术资源的语义检索能力。[方法/过程] 利用自然语言处理、文本挖掘技术,对采集来的学术资源（主要是学术论文）元数据进行预处理,结合word2vec词向量生成工具和elasticsearch全文检索引擎搭建语义检索系统,对学术资源进行语义检索的探索研究。[结果/结论] 本文提出的方法能够有效提升学术信息的检索效果,一定程度上实现学术资源的语义检索,并为后续语义检索的进一步研究提供借鉴。     

Understanding the Nature,Uses, and Gratifications of Social Television: Implications for Developing Viewer Engagement and Network Loyalty

This study employed an online survey (N = 310) to explore how viewers’ motivations for social TV participation influence their involvement in social TV activities, their program commitment, and network loyalty. Findings show that social infotainment and social companionship are the primary motivations of social TV participation. However, only social infotainment significantly predicts the intensity of viewers’ social TV usage, which has a positive influence on program commitment and network loyalty. Additionally, the relationship between social TV usage and network loyalty is partially mediated by program commitment. These findings demonstrate the value of social TV to broadcasters and provide directions for initiating and maintaining long-term relationships with viewers.     

论编辑新发展观

将党中央提出的新发展理念合理地运用到编辑职业发展中,提出协调、融合、开放、卓越、共享的编辑新发展观,并对其内涵、主要特征和涵育路径进行论述.认为编辑新发展观是一个系统化的逻辑体系,具有人本性、参与性、创造性的鲜明特点.涵育编辑新发展观,需要国家加强顶层设计,厚植编辑茁壮成长的发展基础;需要单位坚持"以人为本",营造编辑干事创业风清气正的微环境;需要个人坚定文化自信,在出版业发展中不断超越自己.     

电子、计算机类科技期刊的选题策划——以《数据采集与处理》为例

科技期刊的选题策划是科技期刊出版流程中的重要环节,也是编辑理念和编辑实践的重要体现.本文结合《数据采集与处理》近年来在选题策划方面所做的工作和经验,介绍选题策划的基本原则及方法和途径,明确指出选题策划是办刊宗旨的具体体现.《数据采集与处理》在选题策划方面取得的成绩说明选题策划对科技期刊发展十分重要.     

数字叙事中的用户参与行为研究

在阐述数字叙事领域互动理论的基础上,借鉴美国学者玛丽-劳尔·瑞安(Marie-Laure Ryan)的"数字文本用户参与层理论",分析超文本小说、互动游戏、虚拟游戏等数字叙事中的用户参与行为.指出随着用户参与数字叙事深度和广度的加强,用户的参与行为在整个故事生成中的作用更加重要,但用户的参与行为始终受到故事情节和数字叙事系统的制约.     

Solid-state intramolecular motions in continuous fibers driven by ambient humidity for fluorescent sensors

One striking feature of molecular rotors is their ability to change conformation with detectable optical signals through molecular motion when stimulated. However, due to the strong intermolecular interactions, synthetic molecular rotors have often relied on fluid environments. Here, we take advantage of the solid-state intramolecular motion of aggregation-induced emission (AIE) molecular rotors and one-dimensional fibers, developing highly sensitive optical fiber sensors that respond to ambient humidity rapidly and reversibly with observable chromatic fluorescence change. Moisture environments induce the swelling of the polymer fibers, activating intramolecular motions of AIE molecules to result in red-shifted fluorescence and linear response to ambient humidity. In this case, polymer fiber provides a process-friendly architecture and a physically tunable medium for the embedded AIE molecules to manipulate their fluorescence response characteristics. Assembly of sensor fibers could be built into hierarchical structures, which are adaptive to diverse-configuration for spatial-temporal humidity mapping, and suitable for device integration to build light-emitting sensors as well as touchless positioning interfaces for intelligence systems.     

Photonic orbital angular momentum with controllable orientation

Vortices are whirling disturbances, commonly found in nature, ranging from tremendously small scales in Bose-Einstein condensations to cosmologically colossal scales in spiral galaxies. An optical vortex, generally associated with a spiral phase, can carry orbital angular momentum (OAM). The optical OAM can either be in the longitudinal direction if the spiral phase twists in the spatial domain or in the transverse direction if the phase rotates in the spatiotemporal domain. In this article, we demonstrate the intersection of spatiotemporal vortices and spatial vortices in a wave packet. As a result of this intersection, the wave packet hosts a tilted OAM that provides an additional degree of freedom to the applications that harness the OAM of photons.     

指向关键能力培养的生物学作业设计与实践

关键能力是高考评价体系“四层”的考查重点,作业是能力培养的重要载体.本文对生物学作业进行模型化、流程化和进阶化的设计,目的是建构思维模型、领悟探究过程和训练逻辑思维,促进学生思维的发展,以落实关键能力的培养.