“工程图学”混合式教学模式探索与实践

针对“工程图学”课程教学,基于云班课平台功能设计了混合式教学模式教学活动流程。聚焦教学活动组织、教学内容重组和教学内容呈现等三个方面进行“工程图学”混合教学的实施。在教学实践中,采用线下教师主导型的混合式教学模式,学生走上讲台翻转课堂,针对不同教学内容和反馈结果调整不同的授课方法,使得知识能够有效传递和共享。通过“工程图学”混合式教学的探索和实践,可以看到创新的教学方法融合现代信息技术是现代教学的发展趋势,混合式教学模式给“工程图学”教学的深化改革和创新提供了思路。     

Psychometric Properties of Raw and Scale Scores on Mixed‐Format Tests

This paper illustrates that the psychometric properties of scores and scales that are used with mixed‐format educational tests can impact the use and interpretation of the scores that are reported to examinees. Psychometric properties that include reliability and conditional standard errors of measurement are considered in this paper. The focus is on mixed‐format tests in situations for which raw scores are integer‐weighted sums of item scores. Four associated real‐data examples include (a) effects of weights associated with each item type on reliability, (b) comparison of psychometric properties of different scale scores, (c) evaluation of the equity property of equating, and (d) comparison of the use of unidimensional and multidimensional procedures for evaluating psychometric properties. Throughout the paper, and especially in the conclusion section, the examples are related to issues associated with test interpretation and test use.     

Emotional education program for adolescents (PREDEMA): evaluation from the perspective of students and effects on socio-affective competences / Programa de educación emocional para adolescentes (PREDEMA): valoración desde la perspectiva de los participantes y sus efectos en las competencias socio-afectivas

The literature reveals multiple benefits of emotional education in adolescents’ development. This study examines the effects perceived by participants in the Emotional Education Programme for Adolescents (PREDEMA), which is based on the ability model of emotional intelligence and assumes a dialogical paradigm geared at meaningful learning. A total of 293 students aged 11 to 15 participated in the programme. A mixed methodology was used to evaluate the intervention, analysing participants’ perceived learning and exploring their subjective experience in depth. The results indicate significant learning in all four emotional competences described by the emotional intelligence model, as well as in related areas. The contribution of the qualitative methodology in combination with quantitative analysis is discussed to explore the effects of emotional education programmes that promote adolescents’ emotional awareness.     

项目教学与案例教学在广告专业教学中的混搭运用

项目教学与案例教学都是在广告专业教学中被重点采用的教学理念。本文介绍了项目教学与案例教学两种教学理念在教学内容、教学材料、教学方法、教学模式、教学理念方面的混搭运用。     

The magic and misdirection of public service loan forgiveness in the United States

In recent years, the Public Service Loan Forgiveness program has garnered more attention among student loan borrowers in the United States as a potential source of loan relief. However—at least prior to the PSLF Program Overhaul introduced in October 2021—arduous eligibility criteria, opaque communication on the part of the U.S. Department of Education and contracted loan servicers, and ongoing threats to the continuation of the program made for a skittish and frustrated group of enrollees. This article leverages a mixed methods study to explore the meaning borrowers ascribe to prospective loan forgiveness and interrogates how magical thinking contributes to enrollees' perspectives on prospective loan forgiveness. With several of these sources of meaning standing in conflict with each other and with confidence in personal prospects of loan forgiveness fairly low, we argue that magical thinking overlays the meaning of potential loan forgiveness among some borrowers.     

非线性二次最优控制问题的插值系数混合有限元法收敛性

研究了用混合有限元法逼近由非线性椭圆方程控制的一般凸最优控制问题,并将插值系数的思想用于问题的非线性项用处理,得到了一种简单而高效的数值方法——插值系数混合有限元法,并对状态和控制变量分别推导出了其最优阶的先验误差估计.     

高效液相色谱-质谱联用法测定洗涤用品中的壬基苯酚聚氧乙烯醚和辛基苯酚聚氧乙烯醚

建立了固相萃取净化技术结合高效液相色谱-质谱法同时测定洗衣粉和洗衣液等洗涤用品中的壬基苯酚聚氧乙烯醚和辛基苯酚聚氧乙烯醚的分析方法。样品经甲醇提取后,经HLB固相萃取小柱净化后,采用Inertsil ODS-SPC18（5μm,4．6＊150mmi．d．）色谱柱,以甲醇和0．05mmol／L乙酸铵溶液为流动相,电喷雾质谱在Q1检测模式下分析目标化合物,采用外标法定量。结果表明：壬基苯酚聚氧乙烯醚和辛基苯酚聚氧乙烯醚的平均加标回收率为88．8％～98．6％,相对标准偏差在3．1％～6．4％;方法检出限为2mg／L。将本方法用于市售的洗衣粉和洗衣液的检测发现,洗衣粉样品中壬基苯酚聚氧乙烯醚的检出率为16％,洗衣液中暂时未有检出。     

Hilbert空间中广义逆混合变分不等式的广义f-投影算法

文章研究了Hilbert空间中一类广义逆混合变分不等式解的存在性.利用广义f-投影算子的性质,构造了新的迭代公式,研究了这类迭代公式的收敛性,给出了所得的收敛结果是广义逆混合变分不等式的解.     

四甘醇桥连双咪唑阳离子离子液体的合成

本研究采用四甘醇和二氯亚砜为原料,先合成二氯四甘醇,再将其与1-甲基咪唑反应,得到中间产物双咪唑阳离子氯盐.最后将双咪唑阳离子氯盐和四氟硼酸钠进行阴离子交换得到双咪唑阳离子四氟硼酸盐离子液体,并进行结构确证.     

离子液体法合成盐酸吗啉双胍

离子液体为反应溶剂的条件下,以吗啉、浓盐酸、双氰胺为原料通过缩合反应合成盐酸吗啉双胍。考察离子液体的用量、反应时间、反应物摩尔比、反应温度等影响因素对收率的影响。研究盐酸吗啉双胍与离子液体分离和纯化的方法。研究结果表明:在离子液体为反应溶剂的条件下以吗啉、浓盐酸、双氰胺为原料通过缩合反应合成盐酸吗啉双胍的方法简单,产品易于分离。通过对影响因素的考察,找到了最佳合成条件:物料配比为1:1.1;最佳反应时间为3 h;缩合反应温度为135℃。