三峡移民社区存在的问题及对策研究

通过分析三峡移民社区普遍存在的问题和原因,从移民身心健康、和谐社区构建、移民自身素质提高、发展致富等几个途径入手,提出解决对策,以促进移民社区的建设和发展.     

Electrochemical performance of interfacially polymerized polyaniline nanofibres as electrode materials for non-aqueous redox supercapacitors

H⁺ doped polyaniline nanofibre (PH) was synthesized by interfacial polymerization and polyanilines doped with Li salt (PLI and PHLI) were prepared by immersing emeraldine base (EB) and H⁺ doped polyaniline in 1 mol/L LiPF₆/(EC-EMC-DMC), respectively. PH, PLI and PHLI were all characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectrometry. With 1 mol/L LiPF₆/(EC-EMC-DMC) as electrolyte, PH, PHLI and PLI were used as the active materials of symmetric non-aqueous redox supercapacitors. PLI shows the highest initial specific capacitance of 120 F/g (47 F/g for PH and 66 F/g for PHLI) among three samples. After 500 cycles, the specific capacitance of PLI remains 75 F/g, indicating the good cycleability.     

原料及配比对磷酸镁水泥性能影响的研究

采用磷酸二氢铵、磷酸二氢钾和磷酸氢二铵作为引入磷的材料,不同细度的重烧镁砂以及不同掺量硼砂作为缓凝剂,通过测定其标准稠度需水量、凝结时间和抗压强度,结合X射线衍射分析和扫描电镜分析,研究了不同的磷酸盐原料及配比对磷酸镁水泥性能的影响。结果表明,磷酸盐水泥的凝结时间和强度随原料及配比变化有较大差异,磷酸二氢钾与磷酸二氢铵的性能较为接近,而采用磷酸氢二铵既加大了标准稠度用水量,也大幅度延长了凝结时间;同时采用磷酸氢二铵试样的强度相对也远小于采用磷酸二氢钾与磷酸二氢铵的试样;硼砂作为缓凝剂也可明显延长磷酸镁水泥的凝结时间。     

RSM法优化微波场下壳聚糖降解

采用响应曲面法分析了壳聚糖质量分数、pH值以及微波辐射时间对壳聚糖相对分子质量的影响,并建立了相应的预测模型.在微波功率为528 W时,壳聚糖质量分数、pH值及微波辐射时间对壳聚糖的相对分子质量有显著的影响.相对分子质量为1.00×10^4的低聚壳聚糖,模型优化所得的较优工艺参数：质量分数为4.55%,pH值为7.7,辐射时间为54.8 min,对应的相对分子质量试验值为9.75×10^3.通过验证证明,所得到的壳聚糖降解工艺参数是可行的,并得到一个能较好预测试验结果的模型方程.     

除草剂乳氟禾草灵的合成

以三氟羧草醚、氯化亚砜、乳酸乙酯为原料,经酰氯化反应、酯化反应合成除草剂乳氟禾草灵.对反应的时间、温度、催化剂进行考察,确定优化实验条件.在酰氯化反应回流时间为6 h,酯化反应温度为60℃,酯化反应时间为4 h,催化剂为三乙胺的反应条件下,产品总收率达90.26%.制得的产品经红外光谱和核磁共振波谱鉴定,证明结构正确.     

整合实践教学资源提高思想政治理论课教学效果

通过对思想政治理论课实践教学资源内涵的界定,对当前思想政治理论课实践教学资源整合现状分析,提出了整合实践教学资源的原则与途径。     

模拟移动床色谱法分离C60的条件选择

用模拟移动床色谱对C60进行了分离。工作参数：直径1cm长10cm的半制备柱;固定相为ODS;残余液流速2．2mL/min,萃取液流速2mL／min,进样流速12mL/h;室温;切除C60前杂质的流动相V（甲醇）：V（甲苯）=60：40,切换时间14．5—15．5min;切除C60后杂质的流动相V（甲醇）：V（甲苯）=50：50,切换时间19．5—20．5min;在上述条件下,对80％C60固体粉末进行分离,C60的纯度可达95％,收率大于70％。结果表明,这种方法是可行的,易于实现工业化。     

Synthesis of MnxZn(1-x)Fe2O4 Nanoparticles by Ball-milling Hydrothermal Method

SMnZn1-xFe2O4 (x=1,0.9,0.8,0.7,0.6,0.5,0.25,0) nanoparticles were prepared by ball-milling hydrothermal and investigated by X-ray diffraction, DTG and TEM, Nanocrystallite grain size was determined by X-ray linewidth to be from 63 (A) to 274 (A). The thermal properties indicate absorbed water still remain at low temperature, crystalline ware will be decomposed from 230 ℃ to 260 ℃, partial Mn2 will be oxidized near 730 ℃. TEM shows the ferrite particles pocess a spherical morphology and uniform nanosize.     

Electrical conductivity of (Na_3AlF_6-40%K_3AlF_6)-AlF_3-Al_2O_3 melts

The effects of contents of AlF3 and Al2O3,and temperature on electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 were studied by continuously varying cell constant (CVCC) technique.The results show that the conductivities of melts increase with the increase of temperature,but by different extents.Every increasing 10 ℃ results in an increase of 1.85×10-2,1.86×10-2,1.89×10-2 and 2.20×10-2 S/cm in conductivity for the (Na3AlF6-40%K3AlF6)-AlF3 melts containing 0%,20%,24%,and 30% AlF3,respectively.An increase of every 10 ℃ in temperature results an increase about 1.89×10-2,1.94×10-2,1.95×10-2,1.99×10-2 and 2.10×10-2 S/cm for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts containing 0%,1%,2%,3% and 4% A12O3,respectively.The activation energy of conductance was calculated based on Arrhenius equation.Every increasing 1% of AlF3 results in a decrease of 0.019 and 0.020 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AIF3 melts at 900 and 1 000 ℃,respectively.Every increase of 1% Al2O3 results in a decrease of 0.07 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts.The activation energy of conductance increases with the increase in content of AlF3 and Al2O3.     

基于UGNX的机械创新设计软件平台的建立

针对目前机构组合与创新设计实验平台的不足,以UGNX软件为开发平台,利用VC 6.0面向对象的编程技术,在UG/Open API开发平台上,建立了三维机械创新设计的构件库,实现参数化尺寸驱动,提高了学生的机械创新设计能力.