"城中村"问题初探     

张建生 《中国科技信息》2007,(2):198-199

首先分析城中村的成因及存在问题,接着指出城中村改造面临的问题,最后给出城中村改造的对策。  相似文献   

自反视角下高管团队团队过程、团队信任对决策绩效的影响          下载免费PDF全文

刘喜怀 《科研管理》2016,37(10):112-120

把团队自反性和团队信任相结合引入高管团队(TMT)理论,并对相关文献进行梳理,提出研究假设及理论模型,通过对有效样本数据进行层级回归分析,探究TMT团队信任对团队过程和决策绩效的中介作用及TMT团队自反性对团队过程和团队信任的调节作用。研究结果表明,TMT团队过程对决策绩效具有显著的正向影响;TMT团队过程对团队信任也具有显著的正向影响;TMT团队信任对决策绩效也具有显著的正向影响;因此,TMT团队信任能中介团队过程对决策绩效的正向影响。另外,TMT团队自反性能调节团队过程对团队信任的正向影响。  相似文献   

元明清“湘黔滇驿道”建置过程及路线变迁     

黄菡薇 《安顺学院学报》2019,(2):22-28

"湘黔滇驿道"特指元、明、清三代东起辰州沅陵,西达中庆昆明的官修驿道。该驿道在元代始获国家开发,贯通的标志是元王朝在普安路段建立站赤。元明政权更替后,该驿道在明洪武年间得到重建,重建后驿站数量增加,路线也较元代清晰。清雍正年间,该驿道再次经历大规模调整,调整后驿道有多段北移。经历三朝变化的"湘黔滇驿道",最终对湘、黔、滇三地的现代交通建设产生了深远影响。  相似文献   

Mathematical development: the role of broad cognitive processes     

Carlos O. Calderón-Tena 《Educational Psychology in Practice》2016,32(2):107-121

This study investigated the role of broad cognitive processes in the development of mathematics skills among children and adolescents. Four hundred and forty-seven students (age mean [M] = 10.23 years, 73% boys and 27% girls) from an elementary school district in the US southwest participated. Structural equation modelling tests indicated that calculation complexity was predicted by long-term retrieval and working memory; calculation fluency was predicted by perceptual processing speed, phonetic coding, and visual processing; problem solving was predicted by fluid reasoning, crystallised knowledge, working memory, and perceptual processing speed. Younger students’ problem solving skills were more strongly associated with fluid reasoning skills, relative to older students. Conversely, older students’ problem solving skills were more strongly associated with crystallised knowledge skills, relative to younger students. Findings are consistent with the theoretical suggestion that broad cognitive processes play specific roles in the development of mathematical skills among children and adolescents. Implications for educational psychologists are discussed.  相似文献   

Lifelong learning policies supporting young adults in two Portuguese regions     

Mariana Rodrigues  Rita Queiroga  Ana Bela Ribeiro  Natália Alves  Tiago Neves 《International Journal of Lifelong Education》2020,39(1):61-74

ABSTRACT

Precarious jobs and unemployment have become common issues for many young adults due to the unfavourable labour market situation in Portugal. Against this background, lifelong learning (LLL) policies have been called in to play a role in creating economic growth and supporting the social inclusion of young adults in vulnerable educational and economic circumstances. These policies are defined at the national level; however, their implementation depends on the action of local actors who face specific challenges. This paper explores disparities in the definition and implementation of LLL policies targeting young adults in two Portuguese regions. Specifically, we analyse professional courses in Vale do Ave (North) and adult education and training courses in Alentejo Litoral (South). These regions were selected due to their dissimilar economic structure. This study adopted a qualitative approach through interviews with LLL experts and policy roundtables with local stakeholders and decision-makers in both regions. Data were transcribed and analysed using NVivo 10. The study shows that the two regions have different cooperation networks between local stakeholders, and that these impact the opportunities to influence the regional skills formation system differently. Also, the study shows that LLL policies are not designed to address destandardised life courses.  相似文献   

服务台由N个部件串联的M/G/1(E,MV)可修排队系统的平稳分布     

魏瑛源 《河西学院学报》2006,22(2):6-10

文章考虑到服务台是由N个不同型部件串联组成的M/G/1(E,MV)可修排队系统,其中服务台工作当且仅当N个部件都工作.假定每个部件的寿命服从指数分布,故障部件的修理时间服从一般分布.通过引入顾客的“广义服务时间”和队长过程的嵌入Markov链,得到了嵌入Markov链的平稳分布的递推表达式以及平均队长.  相似文献   

Latent Markov Factor Analysis for Exploring Measurement Model Changes in Time-Intensive Longitudinal Studies     

Leonie V. D. E. Vogelsmeier  Jeroen K. Vermunt  Eeske van Roekel  Kim De Roover 《Structural equation modeling》2019,26(4):557-575

When time-intensive longitudinal data are used to study daily-life dynamics of psychological constructs (e.g., well-being) within persons over time (e.g., by means of experience sampling methodology), the measurement model (MM)—indicating which constructs are measured by which items—can be affected by time- or situation-specific artifacts (e.g., response styles and altered item interpretation). If not captured, these changes might lead to invalid inferences about the constructs. Existing methodology can only test for a priori hypotheses on MM changes, which are often absent or incomplete. Therefore, we present the exploratory method “latent Markov factor analysis” (LMFA), wherein a latent Markov chain captures MM changes by clustering observations per subject into a few states. Specifically, each state gathers validly comparable observations, and state-specific factor analyses reveal what the MMs look like. LMFA performs well in recovering parameters under a wide range of simulated conditions, and its empirical value is illustrated with an example.  相似文献   

Constructing Scientific Explanations Through Writing   总被引：4，自引：0，他引：4  

Perry D. Klein 《Instructional Science》2004,32(3):191-231

This study examined the writing strategies andtext characteristics associated withdiscovering a scientific principle by writingabout an experiment. Sixty-four universitystudents (non-science majors) carried out aphysics experiment concerning either buoyancy,or the forces acting on a balance scale, thenwrote an informal journal-style note about itwhile thinking-aloud. They providedexplanations of the phenomena beforeexperimenting, immediately after experimenting(before writing), and again after writing aboutthe experiment. Students' verbal protocolswere segmented and writing operations wereidentified; the rhetorical structures of theirtexts were analyzed; and each students' levelof general writing strategy was identified. Afactor analysis showed that six componentsaccounted for 76% of the variance in thesemeasures. Logistic regression analysis showedthat type of science experiment and two writingfactors, Problem Solving and Comparisons inText, discriminated 86% of cases in whichstudents made explanatory gains during thewriting interval. The results generallyexemplified a metacognitive, problem solvingmodel of writing to learn. However, incontrast to dominant metacognitive models,setting content goals, applying moderatelysophisticated writing strategies, and extensiveuse of content sources were important for learning.  相似文献   

CHARACTER, CIVIC RENEWAL AND SERVICE LEARNING FOR DEMOCRATIC CITIZENSHIP IN HIGHER EDUCATION   总被引：1，自引：0，他引：1  

John  Annette    《British Journal of Educational Studies》2005,53(3):326-340

ABSTRACT:  This article explores the civic republican conception of citizenship underlying the Labour government's programme of civil renewal and the introduction of education for democratic citizenship. It considers the importance of the cultivation of civic virtue through political participation for such developments and it reviews the research into how service learning linked to character education can lead to the civic virtue of duty or social responsibility.  相似文献   

一类带常利率的更新过程     

汪春华 《宁波职业技术学院学报》2007,11(5):6-9

在最近的研究中人们对经典的破产模型进行了一系列的补充,但对于索赔基本都认为是独立同分布的,但事实并非如此。在这里研究了一种模型,只要求索赔是无关的,但分布相同。并推导出了破产概率公式。  相似文献