浅谈无棱镜全站仪在城市规划测量中的应用     

王辉  赵振伟 《辽宁科技学院学报》2011,13(2):26-28

介绍了无棱镜全站仪测量技术的基本原理和优点,以拓普康GPT—3002LN无棱镜全站仪在城市规划测量中的应用为例,探讨了在无棱镜条件下数据采集的精度及注意事项。  相似文献   

内疚的界定和测量以及研究方法述评     

王林  李伟强 《宁波教育学院学报》2011,13(4):54-57

作为人类高度社会化的负性自我道德情感体验,内疚是个体对自身经历的不良事件进行评价和认知的产物,同时也是影响个体后续行为的重要因素,它与个体的身心健康和社会化的发展有着非常密切的关系。西方心理学界对这一情绪进行了大量的研究。国内关于内疚的研究报告零星可数。对内疚的概念界定与测量、内疚态度的研究现状进行系统的阐述,有助于深入探讨内疚领域特有的问题。  相似文献   

Using students’ feedback for teacher education: measurement invariance across pre-service teacher-rated and student-rated aspects of quality of teaching     

Georg Krammer  Barbara Pflanzl  Johannes Mayr 《Assessment & Evaluation in Higher Education》2019,44(4):596-609

Comparing self-perceived quality of teaching to students’ perception can be used in higher education to improve the quality of teaching of pre-service teachers in teacher education. However, comparing these measurements from different perspectives is only meaningful if the same constructs are being measured. To shed light on this comparison’s meaningfulness, we scrutinised whether aspects of quality of teaching are measured in the same way across pre-service teachers and their students by means of measurement invariance analyses. To do so, 272 pre-service teachers in teacher education rated aspects of their quality of teaching, and were rated by their 4851 students. Measurement invariance across these perspectives was tested in multilevel structural equation models. Strong measurement invariance held for two aspects of quality of teaching; for the third, one item lacked weak measurement invariance. Pre-service teachers perceived their quality of teaching lower than their students. In conclusion, aspects of quality of teaching can be compared across perspectives, and teacher education should encourage pre-service teachers to use students’ feedback as a valuable resource for improving their quality of teaching.  相似文献   

基于UWN的协同创新知识网络中知识流动效率测度     

苏加福  杨涛  胡森森 《科研管理》2020,41(8):248-257

知识流动效率对创新绩效有着重要影响,在协同创新领域更是如此。为有效测度协同创新知识网络的知识流动效率,本文提出一种基于无向加权网络（Undirected Weighted Network, UWN）的知识流动效率测度模型。首先,基于协同创新知识网络的节点特性、节点间关系特性,构建协同创新知识网络的UWN模型;综合考虑协同创新知识网络中知识流动效率的多重影响因素,提出一个新的知识流动效率测度模型,并进一步提出该模型在成员管理中的延伸应用;最后,通过某智能手机开发企业的应用案例验证本文所提模型与方法的可行性与有效性。  相似文献   

生产性服务业集聚、空间溢出与产业结构升级——基于全国239个地级城市的实证检验     

温婷 《科技管理研究》2020,40(21):143-153

在生产性服务业集聚快速发展的背景下,对集聚的空间溢出效应进行研究。以全国239个地级城市为样本,在地理距离权重和经济距离权重矩阵下分别建立空间计量模型定量测度生产性服务业集聚对产业结构升级的影响并比较其行业差异。结果显示,我国生产性服务业整体集聚不仅能够对本地产业结构升级产生促进作用,还对周边城市的产业结构升级存在正向溢出效应,且经济发展特征对产业结构升级的空间相关性影响更大;不同生产性服务行业集聚对本地及周边城市的产业结构升级影响各异,其中信息服务业集聚促进作用最大,其余依次为物流业集聚、金融业集聚,科技服务业集聚和商务服务业集聚。  相似文献   

浅析超低音扬声器阵列的指向性控制     

王瑞婷  魏增来 《演艺科技》2020,(1):29-37,76

论述指向性超低音扬声器阵列的意义和实际应用价值,阐述三种常规超低音扬声器阵列的指向性基本原理,采用专用计算机软件进行模拟仿真,利用实际消声室实验对该基础理论以及计算机仿真结果进行验证及归纳总结;并针对侧墙对Front/Back阵列声辐射的影响进行探究,通过实验得出结论。  相似文献   

The dynamic control ratio at the equilibrium point (DCRe): introducing relative and absolute reliability scores     

Tobias Alt  Axel J. Knicker  Heiko K. Strüder 《Journal of sports sciences》2017,35(7):688-693

Analytical methods to assess thigh muscle balance need to provide reliable data to allow meaningful interpretation. However, reproducibility of the dynamic control ratio at the equilibrium point has not been evaluated yet. Therefore, the aim of this study was to compare relative and absolute reliability indices of its angle and moment values with conventional and functional hamstring–quadriceps ratios. Furthermore, effects of familiarisation and angular velocity on reproducibility were analysed. A number of 33 male volunteers participated in 3 identical test sessions. Peak moments (PMs) were determined unilaterally during maximum concentric and eccentric knee flexion (prone) and extension (supine position) at 0.53, 1.57 and 2.62 rad · s^–1. A repeated measure, ANOVA, confirmed systematic bias. Intra-class correlation coefficients and standard errors of measurement indicated relative and absolute reliability. Correlation coefficients were averaged over respective factors and tested for significant differences. All balance scores showed comparable low-to-moderate relative (<0.8–0.9) and good absolute reliability (<10%). Relative reproducibility of dynamic control equilibrium parameters augmented with increasing angular velocity, but not with familiarisation. At 2.62 rad · s^–1, high (moment: 0.906) to moderate (angle: 0.833) relative reliability scores with accordingly high absolute indices (4.9% and 6.4%) became apparent. Thus, the dynamic control equilibrium is an equivalent method for the reliable assessment of thigh muscle balance.  相似文献   

A short German Physical-Self-Concept Questionnaire for elementary school children (PSCQ-C): Factorial validity and measurement invariance across gender     

Annette Lohbeck  Maike Tietjens  Andreas Bund 《Journal of sports sciences》2017,35(17):1691-1696

Research on children’s physical self-concept (PSC) is increasingly recognised as an important field of psychology. However, there is a lack of instruments suitable for younger children at elementary school age. In the present study, a short German 21-item Physical Self-Concept-Questionnaire for children (PSCQ-C) was tested measuring seven specific facets of elementary school children’s PSC (strength, endurance, speed, flexibility, coordination, physical appearance, global sport competence). A number of 770 elementary school children aged 8–12 years completed the PSCQ-C. Results showed good psychometric properties and high reliabilities of the seven scales. Confirmatory factor analysis revealed that the presumed 7-factor model fitted the data best compared to a global 1- and 2-factor model. Also, full measurement invariance was strongly established. Correlations among the seven scales were mainly moderate. Gender differences were suggestive of developmental trends that are consistent with prior studies. These results provide support that the PSCQ-C is a confidential instrument with sound psychometric properties measuring seven specific facets of elementary school children’s PSC.  相似文献   

开发数字图书馆需考虑的几个问题   总被引：7，自引：0，他引：7       下载免费PDF全文

刘友华 《中国图书馆学报》2005,31(4)

数字图书馆开发者须熟悉系统内容和用户需求;要通过维护系统品质和易访问性来保证系统的持久可用;使用导航模块等工具技术,确保大多数用户能简易省时地使用系统;保证系统的开放性是为了接纳潜在的用户群体,并使系统容易适应变化的运行环境和技术更新。参考文献15。  相似文献   

大众健美操对女青年体形的影响   总被引：3，自引：1，他引：2  

罗力  唐照华 《四川体育科学》1999,(2):48-49

大众健美操训练对青年女性体型具有一定的影响。测试研究结果表明,通过３０名青年女性经过三个月的大众健美操的练习后,体重、皮脂厚度、围度都有不同程度的增长和减少,达到健身健美的目的。  相似文献