全氢罩式退火炉内罩结垢腐蚀分析与改善     

孥力 《马钢职工大学学报》2013,(2):23-25

根据某冷轧板厂全氢罩式退火炉内罩结垢腐蚀现象,从生产条件和接触的介质入手进行了分析、调研和取样化验,提出相应的改善措施,抑制腐蚀结垢现象的发生与恶化,从而提高罩式炉产能和内罩的使用寿命。  相似文献   

交通可达性反贫困作用的空间分异分析——以福建省为例     

侯秀英  邱荣祖  林玉英  王剑凯  胡喜生 《资源科学》2019,41(11):2094-2106

交通基础设施与区域贫困之间的空间关系研究是实施乡村振兴战略的基础。以福建省为例,利用加权平均旅行时间表征县域水平交通可达性,通过生计五边形法计算县域水平多维贫困指数,在此基础上,运用地理加权回归对县域交通可达性与多维贫困之间关系的空间分异特征进行探讨。结果表明：①福建省县域交通可达性从沿海到山区呈现出“分层结构、南北两级分化”的特征,总体上可达性水平不高;②各县域单维贫困水平差异大,多维贫困表现出较强的地域特征,贫困县域主要分布在闽东部与北部地区;③交通可达性与多维贫困之间既存在协同促进的关系,也存在权衡制约的关系,即交通基础建设对反贫困的作用存在空间分异特征,其中43个县域呈现交通可达性越高,反贫困作用越明显的特征;而15个县域呈现交通可达性越高,反贫困作用越弱的特征,且这些县域主要集中分布在闽北部与西部地区。本文可为提出科学的、差异化的乡村振兴战略提供科学依据,如对于存在权衡制约关系的县域,仅仅依靠交通扶贫战略无法达到预期效果,可结合单维贫困的识别实施精准扶贫。  相似文献   

Reliably Assessing Growth with Longitudinal Diagnostic Classification Models     

Matthew J. Madison 《Educational Measurement》2019,38(2):68-78

Recent advances have enabled diagnostic classification models (DCMs) to accommodate longitudinal data. These longitudinal DCMs were developed to study how examinees change, or transition, between different attribute mastery statuses over time. This study examines using longitudinal DCMs as an approach to assessing growth and serves three purposes: (1) to define and evaluate two reliability measures to be used in the application of longitudinal DCMs; (2) through simulation, demonstrate that longitudinal DCM growth estimates have increased reliability compared to longitudinal item response theory models; and (3) through an empirical analysis, illustrate the practical and interpretive benefits of longitudinal DCMs. A discussion describes how longitudinal DCMs can be used as practical and reliable psychometric models when categorical and criterion‐referenced interpretations of growth are desired.  相似文献   

心理距离视角下网络舆情传播意愿影响因素研究   总被引：1，自引：1，他引：0  

张晓君  黄微  李瑞 《图书情报工作》2019,63(12):86-93

[目的/意义]网络舆情传播意愿的形成是网民的一种心理活动，与心理距离密不可分。了解影响网络舆情传播意愿的主要因素，有助于监督管控部门更加卓有成效地对网络舆情进行预警和治理。[方法/过程]通过对心理距离理论的深层次剖析，对其构成进行阐述，并从时间距离、空间距离、社会距离、概率4个维度出发，做出系列理论假设，利用调查问卷法和最优尺度回归分析法，识别出主要影响因素及其重要程度。[结果/结论]最终归纳出7个影响网民改变其自身传播意愿的主要因素，即报道时间、家乡相关、向往地相关、生活相关、亲戚朋友发布、媒体官方发布、企业官方发布，从这7个影响因素出发监控舆情，可以帮助舆情管控部门更有针对性地掌控舆情的传播方向。  相似文献   

Employees’ perceptions of interpersonal competence: The case of South Korea     

Changdai Kim  Kyung Wha Min  Sook Kyeong Yune  Hanna Choi  Eun Hye Gong 《Asia Pacific Education Review》2008,9(2):221-232

This study examined employees’ perceptions of interpersonal competence at work through the research methodology known as concept mapping. The purpose of this study was to identify the phenomenally derived components of interpersonal competence in work environments and employees’ underlying cognitive structures of interpersonal competence at work. Multidimensional scaling analysis indicated that the participants conceptualized interpersonal competence in the following two dimensions: (i) work-specific domain versus general domain and (ii) unilateral domain versus bilateral domain. In addition, hierarchical clustering on the MDS coordinates produced six clusters: Caring & Considerate, Sociable & Out-going, Kind & Gentle, Reliable & Leadership skills, and Confident & Responsible. Our results were discussed with respect to future research and educational approaches to the issues surrounding interpersonal competencies at work.  相似文献   

Information searches by consumers of miniature automobiles     

CHEN Dao-ping  LIU Wei 《重庆大学学报(英文版)》2008,7(1):58-68

We studied the information search behaviors of Chinese consumers of miniature automobiles. First, we identified the main sources where consumers acquire or seek information about miniature automobiles and discussed their extent of information search. Then, based on logistic regression and optimal scaling regression of statistics, we studied the influences of characteristics of consumers of miniature automobiles on the extent of information search and on Internet usage.. The results indicate that consumers often utilize four sources to obtain information about miniature automobiles. The dominant information source for consumers is their friends/family, followed by dealers, newspapers, and TV. Age, occupation, education and income significantly affect the extent of information search, but gender and city of residence do not have significant impacts. Age, city of residence, occupation, education and income produce significant influences on Internet usage. Gender has an insignificant influence on whether a consumer uses the Internet to search for information.  相似文献   

河汾诸老忧患情怀的多维度解读     

贾晓峰 《忻州师范学院学报》2008,24(1):15-17

河汾诸老是金朝诗歌发展过程中一个重要的作家群,他们生活在金元之际,经历了朝代鼎革的社会大动荡,亲身体验了惨痛的现实,产生了深沉低徊的忧患情怀.他们忧患社会动荡、生灵涂炭,忧患自己的艰难处境,更有黍离之悲、故国之思的家国忧患.  相似文献   

一个基于数据仓库的通用情报处理系统模型   总被引：3，自引：0，他引：3  

姚奕  刘晓明  黄松 《情报科学》2006,24(4):607-611

情报处理是情报学研究的重要组成部分。依据数据仓库的特性，对数据仓库在情报资源处理中的应用进行了可行性分析。利用情报处理主题的层次结构，建立了情报处理实例的多维概念模型，进而提出了一个通用的情报处理系统的实现模型。在数据仓库的基础上，整合了独立分散的信息资源并引入反馈机制，增强了情报搜集、处理、分析和服务能力，较好地发挥情报处理系统的作用，提高了情报处理的效率。  相似文献   

利用PowerDesigner建立数据仓库多维模型的研究     

廖飒 《南宁师范高等专科学校学报》2006,23(1):73-75

本文介绍了数据仓库的多维模型,对使用PowerDesigner建立数据仓库多维模型进行研究, 并分析了其在“学生成绩分析”系统中应用。  相似文献   

Josephson结中的螺旋林孤子     

海文华  肖奕 《衡阳师范学院学报》1995,(6)

超导薄膜表面存在螺旋林结构的事实说明，在由两块超导薄膜弱连接构成的Josephson结中，Josephson电流可能沿螺旋林传导。假定初始时刻Josephson方程的解满足这个要求，可以得到螺旋林孤子解。这些孤子局部为空间螺旋线，整体为螺旋林，并沿螺旋轴向运动；从而较好地描述了沿螺旋林传导的Josephson电流。  相似文献