铝型材碱蚀砂面工艺的研究与应用

介绍了一种已实现工业应用的磨砂型材生产工艺。在前人研究的基础上 ,根据铝的性质 ,从碱液浓度、温度、络合、整平等方面进行试验 ,发展了砂面剂。介绍了砂面剂中部分物质的作用     

Hopes for the future: demographic and personal resources associated with self-perceived employability and actual employment among senior year students

Undergraduates approaching completion of their studies may embrace the prospect of entry into the world of work as a challenge or conversely, may view it with trepidation. This study explores three major personal resources that may be associated with how young undergraduates view their future employability: perceived hope, grit and emotional intelligence. Demographics associated in the literature with perceived chance of employment – gender, age and having a learning disability – were also included in the study. The participants were college students in their senior year (n = 584), studying in a variety of undergraduate programmes. Results show that perceived hope and grit were positively associated with perceived employability whereas the relationship with emotional intelligence was more complex. None of the demographics associated with perceived employability.     

单颗金刚石磨粒磨削玻璃的磨削特性研究

选用钎焊金刚石和固定压头单颗金刚石磨粒磨削玻璃．测量了磨削速度与磨削法向力和切向力的耦合关系,以及不同磨削速度下玻璃表面质量的变化情况。研究表明,磨削法向力和切向力随着磨削速度的增加呈单调递减的趋势,磨削玻璃表面质量（划痕长宽）与磨削速度有着密切关系,划痕尺寸与磨削法向力的变化趋势一致。     

Predicting Grit and Resilience: Exploring College Students’ Academic Rational Beliefs

Data were collected from 289 undergraduate college students at a minority‐serving institution to explore the impact of academic rational beliefs on grit and resilience. Findings from hierarchical regression analyses suggested that academic rational beliefs related to evaluation and work habits accounted for a significant amount of variance in grit. Work habits explained a significant portion of the variance in resilience. On the basis of these results, recommendations for future research and implications for college counselors are offered.     

Adolescent academic achievement: A model of social support and grit

Grit has been defined as passionate perseverance toward long-term challenging goals and it is associated with various positive outcomes for youth, including academic achievement. However, less is known about these associations for the two facets of grit (i.e., perseverance of effort, consistency of interest) and few studies have examined the link between grit and perceived social support. The present study examined the group-level demographic differences (i.e., gender, grade, socioeconomic status, and special education status) of grit in a high school sample (N = 1,077). In addition, direct associations between grit and perceived social support from multiple sources (i.e., teacher, classmate, parent) were examined, as well as a potential enhancing effect of social support as a moderator of the relation between grit and academic achievement. Results indicated positive associations among grit and its facets with social support from parents and classmates. Furthermore, the positive relation between grit and achievement was stronger for students reporting high social support from teachers, but not other sources (i.e., classmates, parents). Practical and theoretical implications for promoting student success are discussed.     

Supportive classrooms for Latino English language learners: Grit,ELL status,and the classroom context

Students' academic achievement is the result of the interplay between person-level and contextual factors (R. R: Greene, 2014; D. E. Hunt, 1975). Students perform better when classroom characteristics support their characteristics. The authors examine whether student perceptions of two classroom characteristics (care and control) fit with two Latino student characteristics (English language learner status and grit) in relation to their academic achievement. Using a sample of fourth- and fifth-grade Latino students from the Measures of Effective Teaching dataset (n = 3,272), the authors conducted a series of nested regression models with two- and three-way interactions between student characteristics and student perceptions of classroom characteristics. Findings revealed that grit is most strongly associated with Latino English language learners’ English/language arts achievement when students perceived that teachers used high levels of care and control. We conclude with implications for practitioners.     

Teacher support,growth language mindset,and academic engagement: The mediating role of L2 grit

Engagement as an essential factor for active and meaningful learning of English-as-a-Foreign-Language (EFL) is affected by both learner external (e.g., teacher support) and internal (e.g., growth language mindset and L2 grit) factors. This study examined the relationship between perceived teacher support, growth language mindset, and academic engagement by considering the mediating role of L2 grit. The participants were 295 Iranian EFL learners selected via multi-stage cluster sampling. The SEM results indicated that perceived teacher support and growth language mindset directly and positively predicted academic engagement. Additionally, L2 grit mediated the relationships ‘between perceived teacher support and academic engagement’ and ‘between growth language mindset and academic engagement’. EFL learners receiving more teacher support and endorsing higher levels of growth language mindset can successfully overcome failures and difficulties in their learning process by showing more persistence in dealing with challenges and sustaining their interest, which could considerably enhance their engagement in learning.     

Persuasive impact of loss and gain frames on intentions to exercise: A test of six moderators

The current study situated loss/gain-framing research in the extended parallel process model and tested whether two message features (dose, efficacy appeals) and four individual difference variables (walking self-efficacy, grit, consideration of future consequences, health information overload (HIO)) moderated the impact of message framing on intentions to engage in physical activity. Adults (N?=?341, M_age?=?38.09, SD?=?10.94) were randomly assigned to one of eight message conditions advocating exercise behavior. All four individual difference variables significantly moderated framing effects such that gain-framed messages were more effective for individuals with lower walking self-efficacy, grit, and consideration of future consequences and loss-framed messages were significantly more effective for individuals with higher walking self-efficacy, grit, consideration of future consequences, and for those with lower HIO.     

Adolescent students’ grit: Do parents’ grit and educational expectations matter?

Despite the widespread enthusiasm towards grit, little attention has been paid to how stable grit remains over time and what contextual factors can predict longitudinal changes in grit. The present study investigated adolescent students’ grit and its change over one year. We employed nationally representative longitudinal data from a sample of Korean adolescent students (N = 2,590) and their parents (N = 2,590). Specifically, we evaluated the temporal stability of student grit, parent grit and educational expectations as determinants of student grit, and the relative importance of student grit in predicting academic achievement compared to academic self-concept. Results of autoregressive cross-lagged modeling revealed that grit was fairly stable over one year. In addition, parents’ grit and educational expectations for students’ educational attainment emerged as significant predictors of longitudinal changes in students’ grit. Finally, when students’ academic self-concept was controlled, students’ grit was not predictive of their academic achievement. Implications and areas of future research are presented and discussed.     

非物质文化遗产的保护与旅游开发——以织金县砂陶工艺为例

织金县砂陶工艺既是一种宝贵的非物质文化遗产,也是一种重要的旅游资源,对非物质文化遗产的保护与旅游开发进行研究,旨在在促进传统文化和民族文化传承与发展的同时,推进旅游产业和文化产业的建设。