在线语言学习的发展与前景

在线语言学习作为外语学习的一种趋势,扩大了学生对教师、对课程、对时空的选择范围,这种不同于传统授课模式的学习方式受到大家的广泛关注。对在线语言学习的发展进行了简要的介绍,并对时下流行的在线学习方式（包括在线语言学习教程、语言学习智能系统、语言学习游戏、移动语言学习和网络沟通五个方面）逐一进行了说明。     

Inclusive instruction and learning for deaf students in postsecondary education

This article explores how students who are deaf and their instructors experience mainstream college classes. Both quantitative and qualitative procedures were used to examine student access to information and their sense of belonging and engagement in learning. Instructors were asked to discuss their approach to teaching and any instructional modifications made to address the needs of deaf learners. Results indicate that deaf students viewed classroom communication and engagement in a similar manner as their hearing peers. Deaf students were more concerned about the pace of instruction and did not feel as much a part of the 'university family' as did their hearing peers. Faculty generally indicated that they made few if any modifications for deaf students and saw support service faculty as responsible for the success or failure of these students. We discuss results of these and additional findings with regard to barriers to equal access and strategies for overcoming these barriers.     

抵押条款在信贷合约中的经济意义研究

在假定抵押资源不受限制以及利率可自由浮动的情况下,分贷后的信息对称和贷后的信息不对称两种情况研究了存在抵押条件时的银企最优契约。无论贷后信息是否对称,在竞争型市场结构中都可以利用抵押条件和利率设计不同的契约组合,实现低风险借款企业与高风险借款企业的分离均衡,在垄断型市场中可以利用一定的契约组合迫使高风险借款企业放弃借款。甄别机制与一般的筛选机制相比,无论贷后信息是否对称,也无论是何种市场结构,甄别机制都可以实现银企更大的总收益。     

增强高职院校思想政治理论课教学效果之我见

高职院校思想政治理论课教学的好坏关键在教师,要增强高职院校思想政治理论课的教学效果,教师要上好第一节课,坚持上好每一节课,要有高度的社会责任感,要对学生有关爱之心。     

青出于蓝而胜于蓝

数学课上解一道几何证明题时,老师用传统思维模式证明出错,学生另辟蹊径寻求解题新思维,求得科学解答。一个课堂小插曲,引发一个道理：青出于蓝而胜于蓝。     

工科教学创新研究——基于课堂教学和实践教学的视角

工科教学工作中存在的问题影响了工科学生培养的整体水平,为改变这一现状,必须改革创新工科教学方式,从课堂教学创新和实践教学创新两个角度出发,探索构建新的教学体系,以提高教学的实效性。     

Novel Pt–Ni Bimetallic Catalysts Pt(Ni)–LaFeO3/SiO2 via Lattice Atomic-Confined Reduction for Highly Efficient Isobutane Dehydrogenation

In this study, a series of novel Pt-Ni bimetallic catalysts supported on LaFeO_3/SiO_2 with different amounts of Ni were prepared by the lattice atomic-confined reduction of LaFe_(1-x)(Ni, Pt)_xO_3/SiO_2 perovskite precursors and applied in isobutane dehydrogenation to isobutene reaction. The catalysts were characterized by X-ray diffraction, H_2-temperature-programmed reduction, Brunauer-Emmett-Teller analysis, transmission electron microscopy, energy dispersive X-ray, CO chemisorption, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The as-synthesized Pt-Ni bimetallic catalysts possessed smaller most probable particle size with tunable Pt-Ni interaction, depending on the Ni content. The catalyst with Ni content of 3.0 wt% showed excellent activity and stability(the isobutane conversion and isobutene selectivity remained at about 38% and 92%, respectively, after 310 min) for the isobutane dehydrogenation reaction. It also provided approximately six times turnover frequency of the catalyst without Ni. The excellent activity and stability of the 3.0 wt% Ni-containing catalyst can be attributed to its small metal nanoparticles with high dispersion and suitable Pt-Ni interaction. Moreover, the Pt(Ni)-LaFeO_3/SiO_2 catalyst with Ni content of 3.0 wt% had been run for more than 35 h without obvious loss of activity,indicating its long-term stability, and the decrease in the Pt-Ni interaction that accompanied the formation of the FeNi alloy phase was thought to be responsible for the slight decrease in activity.     

医药卫生期刊的质量评价

医药卫生期刊质量评价,一是可以促进提高期刊质量,二是可以促进提高编辑人员的业务素质并发现编辑人才,三是可以了解医药卫生期刊的现状并总结其办刊经验予以推广;但由于种种原因,目前医药卫生期刊评价工作中尚存在如下一些问题.     

跨民族文化新闻传播理念的认知与构建

本文探讨了在多民族文化共存的情况下,如何切实有效地实施新闻传播的问题.