树形化合物的产生、发展及应用

介绍了一类树状高度支化、带有很多末端官能团的新的大分子化合物，同时分别介绍了这类化合物的特征、合成方法和潜在应用，并展望了它的发展研究前景。     

维生素B1注射液催化合成芳偶姻的研究

报道利用维生素B1注射液催化合成苯偶姻、糖偶姻的方法。收率在60％－85％以上，并与文献对照，确认无误，使用维生素B1注射液作催化剂，产品收率高，无腐蚀、无毒、价廉且易得。     

应用反应精馏提高草酸二乙酯酯化率

在分析国内生产草酸二乙酯工艺的基础上,探讨了以固体酸和反应精馏耦合技术合成草酸二乙酯的新工艺,分析了挟带剂、塔釜温度、回流进料比及原料醇酸比对反应酯化率的影响．在使用环己烷作为挟带剂时,合成草酸二乙酯的最佳工艺条件为：反应温度115℃,原料醇酸比10：1,回流进料比3：1．此时,草酸二乙酯的酯化率达到90％以上．     

2-氯甲基-5-芳基-1，3，4-噁二唑的合成及光谱分析

合成6个2一氯甲基-5-芳基-1,3,4-噁二唑,化合物的结构经。HNMR、FT—IR、MS表征．光谱分析表明：在260—279nm出现最大紫外一可见吸收峰;在DMF溶液中,334—362nm出现最大荧光发射峰,是一类紫色发光材料．     

3DV quality model based depth maps for view synthesis in FTV system

Depth maps are used for synthesis virtual view in free-viewpoint television (FTV) systems.When depth maps are derived using existing depth estimation methods,the depth distortions will cause undesirable artifacts in the synthesized views.To solve this problem,a 3D video quality model base depth maps (D-3DV) for virtual view synthesis and depth map coding in the FTV applications is proposed.First,the relationships between distortions in coded depth map and rendered view are derived.Then,a precisely 3DV quali...     

新型杂多酸（H3NCH2CH2NHCH2CH2NH3）2[（HPO4）2Mo5O15]的水热合成与晶体结构

合成了一种未见报道的标题化合物（（H3NCH2CH2NHCH2CH2NH3）2[（HPO4）2Mo5O15],Mr=1121.99）并得到单晶,晶体衍射实验发现其属于三斜晶系,P-1空间群,晶体学参数：a=0.980 6（2）nm,b=0.995 2（2）nm,c=1.468 0（3）nm,α=95.46（3）°,β=98.88（3）°,γ=95.70（3）°,V=1.399 6（5）nm3,Z=1,Dc=2.648 mg/m3,（MoKα）=1.199 mm-1,F000=528,最终R=0.042 1,wR=0.099 7,GooF=1.034.配体由一个[（HPO4）2Mo5O15]4-簇阴离子和两个质子化的二乙烯三胺组成,化合物中端基氧与有机胺之间存在大量的氢键作用,使其连成一种新的有机-无机杂化的超分子化合物.     

溴硝基丙二醇的合成和防腐活性研究

合成了防腐剂2-溴-2-硝基-1,3-丙二醇,通过IR波谱和元素分析对其进行表征,并对其防腐性能和毒性研究.     

有机合成中的反应部位控制方法

本文对有机化合物合成路线的控制过程中形成的干扰及排除干扰的方法进行归纳和探讨。希望它能对有机合成路线的设计有一定的参考价值。     

基于模糊变权法的《动车组结构及原理》教学模式改革评价

文章以《动车组结构及原理》课程为例,结合模糊层次分析法和变权综合法提出一种基于模糊变权法的教学模式改革评价方法。该方法有效降低各评价因素权重的主观性,更好地反映改革的整体评价结果,对同类课程的教学模式改革具有一定的借鉴意义。     

Mobile APP for motivation to learning: an engineering case

Synthesis of Materials is regarded as an important core subject in engineering education. However, many concepts and knowledge in the material synthesis can be rather abstract and difficult to understand by the student learners. Experiments are limited in scope due to lack of equipment, control of toxic materials, and risks of chemical reactions, which often restricts student imagination and student involvement in practical training. These reasons often led to poor learning attitude and learning performance among the students. Rapid developments in Cloud technology and mobile devices have provided new opportunities for developing novel learning tools for material synthesis. This study aims to introduce interest factors as a strategy for promoting learning interest and practical skills among the students. Chemical symbols, experimental themes, texts, and interactive elements were utilized to develop a theme-based Mobile Learning APP for teaching the practical techniques of material synthesis. The Mobile Learning APP was then integrated into a problem-based learning activity. A quasi-experimental design was used to investigate the resulting learning effectiveness from using the developed Mobile Learning APP. Results show that the Mobile Learning APP provided a significant positive effect on learning performance and that most students showed favorable attitudes toward the usage of the mobile learning system.