手机颜色词的类型特征及语用功能

"极夜蓝"、"成功银、骑士灰"、神秘紫、"迷幻红"、等这些新出现的手机颜色词是一类值得研究但却没有引起足够关注的新词.从"四个世界"理论出发,有从物理世界、文化世界、心理世界产生的手机颜色词,它们都具有一些特殊的语用功能.     

在Word中直接绘制复杂生物学图形

本文阐述了在W ord中直接绘制复杂生物学图形的一些具体方法和技巧,介绍了创造性使用绘图工具的做法。     

同方向简谐运动的合成研究

基于数学的三角函数方法和物理的旋转矢量方法从理论上对同方向简谐运动的合成进行研究,采用计算机的仿真模拟和物理实验演示等方法对同方向简谐运动的合成进行验证。     

Interventions supporting baccalaureate achievement of Latinx STEM students matriculating at 2-year institutions: A systematic review

Numerous national reports have identified the importance of significantly improving pathways that begin with Latinx students enrolling in 2-year institutions and ultimately completing baccalaureate degrees in STEM fields at 4-year institutions. Many programs using multiple interventions have been designed, implemented, and studied to achieve this goal. To synthesize what has been learned from studies of these programs, this article presents a systematic review of published studies of programs designed to support Latinx student success in 2-year institutions and successful transfer to 4-year institutions, particularly for STEM majors. A total of 49 quantitative, 9 qualitative, and 16 mixed-methods studies published as reports, articles, or dissertations since 1980 were identified that met the criteria for the review. Studies covered a wide range of interventions, including mentoring, counseling, advising, study groups, tutoring, scholarships, orientations, career services, undergraduate research, articulation agreements, and transfer programs. Individually, these studies report positive influences on student success outcomes, including 2- and 4-year graduation, transfer to a 4-year institution, retention, and success in individual courses. However, the number of qualifying studies was surprisingly small, considering the importance of improving success of Latinx students and the length of time during which the problem has been repeatedly emphasized. Few interventions have been undertaken from explicitly assets-based perspectives or theoretical frameworks. The lack of explicit frameworks underlying interventions—combined with a sole/primary focus on students—suggests many interventions were approached from a deficit-based perspective. Further, the study found no pattern of replication studies that might confirm effectiveness of potentially promising interventions. Based on our analysis of evaluations presented in the studies, it does not appear that the research community has developed agreed-upon methods to evaluate commonly agreed-upon outcomes. Finally, no intervention has been sufficiently supported that widespread implementation could be recommended.     

一种新型光学纯胡椒醛基氮杂环丙基羧酸酯的合成与表征

为发展新型手性配体,降低手性催化剂的合成成本,检验由芳醛与手性氨基酸酯缩合、还原反应的普适性,以L-丝氨酸为手性源,经酯化,缩合,还原氨化,关环等反应,设计合成了一种新的胡椒醛基氮杂环丙基羧酸酯5,其结构通过IR,1H NMR,13C NMR,HRMS进行了表征.发展了一条高效便捷合成这类具有光学活性化合物的方法.     

配位聚合物[Co（phen）（Hbtc）（H2O）]n的水热合成及晶体结构

采用水热法合成了一个一维配位聚合物[Co（phen）（Hbtc）（H2O）]n,对其进行了元素分析和单晶X射线衍射测定．该配位聚合物属三斜晶系,P-1空间群,晶体数据为：a=9．5790（9）,b=10．8811（10）,c=11．2224（10）A,α=96．5780（10）,β=111．4630（10）,γ=111．6030（10）°,V=969．22（15）A3,Z=2,Mr=465．27,Dc=1．594g／cm3,F（000）=474,μ=0．934mm^-1,R1=0．0320,ωR2=0．0878．     

计算机基础教学中常见问题分析

在高师多年的计算机信息技术基础教学过程中,发现学生在Windows部分的复制与移动、建立快捷方式、文件重命名、Word部分的编辑排版等多个方面容易出现问题。分析这些常见的问题,然后提出了应对措施。     

再现轨迹的平面四杆机构的最优化设计

为使连杆上某点的运动能最佳逼近给定的轨迹,同时考虑机构运转灵活轻便、结构尺寸合理,须采用最优化设计方法来解决。文章以曲柄摇杆机构为例,对该机构进行了尺寸综合和运动分析,并建立了其优化设计模型,给出了具体的优化设计实例及优化结果。结果表明,采用优化设计方法,可使连杆上的某一点精确再现预定轨迹。     

α-酮酸的应用及合成研究进展

α-酮酸是一类双官能团有机化合物,是有机合成、药物合成及生物合成的重要中间体,已广泛应用于食品、化妆品、药物及有机合成中。本文综述了近年来α-酮酸的应用及合成进展情况,其合成方法包括氧化法、水解法、格氏试剂法、羰基化法、海因法及F-C酰基化法,并对这些合成方法及其应用前景进行了讨论。