红薯叶苋菜复合饮料的研究

通过对红薯叶和苋菜原料配比、浸提条件、护色、调配等的研究，选择出最佳实验配比方案；红薯叶：苋菜为4：3，红薯叶浸提时间为3h，苋菜浸提时间为2h，柠檬酸为0．01％，蔗糖为7．0％，抗异坏血酸钠为0.2％。最终生产出了色、香、味俱佳的具有保健功能的天然红薯叶苋菜复合饮料。     

From plastic-waste to H2: A first approach to the electrochemical reforming of dissolved Poly(methyl methacrylate) particles

The development of sustainable processes for the recycling of plastic is a major environmental issue to reduce the pollution by this kind of waste. The electro-oxidation of plastic wastes in electrolysers powered by renewable energies is a promising option to produce hydrogen at low temperature while diminishing the energy demand compared to Oxygen Evolution Reaction (OER). Poly (methyl-methacrylate) (PMMA) particles, a widely used polymer, were dissolved (0.1–2% wt.) in an isopropanol(IPA)/H₂O binary solvent and electro-oxidized on Pt/C-based electrodes in a liquid batch electrochemical cell at 70 °C in acidic media. Despite the dissolution strategy, polymer macromolecules partially block the accessibility of the active sites of a commercial electrode and strongly degrades its electrochemical performances mainly linked to IPA electro-oxidation. The preparation of a more porous electrode supported on carbon paper was found to strongly hinder this deactivation. Furthermore, the electrooxidation of PMMA or PMMA-derived molecules can be performed during cyclic voltammetries up to 1.4 V and chrono-amperometries at 1.4 V.     

Swarm intelligence for traffic light scheduling: Application to real urban areas

Congestion, pollution, security, parking, noise, and many other problems derived from vehicular traffic are present every day in most cities around the world. The growing number of traffic lights that control the vehicular flow requires a complex scheduling, and hence, automatic systems are indispensable nowadays for optimally tackling this task. In this work, we propose a Swarm Intelligence approach to find successful cycle programs of traffic lights. Using a microscopic traffic simulator, the solutions obtained by our algorithm are evaluated in the context of two large and heterogeneous metropolitan areas located in the cities of Málaga and Sevilla (in Spain). In comparison with cycle programs predefined by experts (close to real ones), our proposal obtains significant profits in terms of two main indicators: the number of vehicles that reach their destinations on time and the global trip time.     

Network method to study the transient heat transfer problem in a vertical channel with viscous dissipation

The transient problem for fully developed mixed convection considering the effect of viscous dissipation is investigated for the laminar flow in a parallel-plate vertical channel by means of the Network Simulation Method. The thermal boundary condition considered is a forced convection. The combined effects of viscous dissipation and buoyancy forces are determined in the solutions for different time intervals, being obtained in all the cases, the velocity field and the temperature field. The times taken to reach steady-state is obtained in all the cases. The numerical procedure employed, which satisfies the conservation law for the heat flux variable and the uniqueness law for temperature, also permits the direct visualisation and evolution of the local and/or integrated transport variables at any point or section of the medium.     

基于AutoCAD的产品图纸审核软件开发

分析了基于AutoCAD绘图软件进行图纸文字信息提取的几种常用方法,提出了实现正确构建产品装配明细(BOM)的基本思路。详细阐述了提取带有属性值的标题栏及明细栏图块信息的实现方法和程序控制流程,并给出关键程序代码。依据企业实际审图步骤和审图内容,总结了由计算机辅助审核的实现方案和审核流程。根据产品明细项备注标示,实现自动进行明细项分类,能够快速准确生成产品综合明细、分类明细及图样目录等报表,并能导出符合企业格式化要求的电子表格文件。     

一种QPSK-DS信号参数估计方法

基于QPSK-DS信号的结构特征,从直扩通信的基本特征和QPSK-DS信号做平方及延迟相乘处理后所具有的典型特征入手,探寻可实现对QPSK-DS信号参数估计的方法。提出了一种基于时域信号处理与频域特征提取的QPSK-DS通信参数估计方法,该方法通过对接收信号做平方和延迟相乘处理然后搜索特征谱线的方法完成对QPSK-DS扩频参数符号周期和码片时宽的估计。仿真试验表明该方法简单有效,可操作性强。     

型钢翼缘外侧焊短钢筋试件的黏结滑移性能

通过推出试验研究型钢翼缘外侧焊短钢筋时与轻骨料混凝土的黏结滑移性能。短钢筋采用垂直焊和水平焊两种方式,间距设置了100 mm和200 mm。试验中考虑未设置剪力连接件的对比试件,试件均发生推出破坏。根据实测的荷载、加载端滑移数据建立二者的关系模型,分析特征黏结强度和特征滑移值。研究结果表明:剪力连接件的设置不宜过密,宜垂直于型钢翼缘焊接;型钢翼缘外侧焊短钢筋没有提高试件的黏结强度,但增加了试件抵抗滑移的能力;设计中应单独考虑自然黏结强度或剪力连接件传递剪力,不能对二者进行叠加。     

生物工程综合性专业实验的教学改革与实践

生物工程专业是以培养应用型人才为目标。从改变实验设置方式、优化实验教学体系及教学内容、改进教学方法入手,对生物工程综合性专业实验进行教学改革与实践,取得了良好的教学效果。     

Optimization of Synthetic Conditions for the Preparation of Dihomo-γ-Linolenic Acid from γ-Linolenic Acid

Orthogonal experiments were employed to optimize the correlated parameters of reduction, sulfonation, substitution and hydrolysis. These reactions were used to convert γ-linolenic acids into dihomo-γ-linolenic acids (DGLA). For the reduction, the best reaction conditions were at 35 °C for 4.5 h with LiAlH₄ and γ-linolenic acid (in the ratio of 40 g:100 g); for the sulfonation, reaction at 29 °C for 3.5 h with 150 g γ-linolenic alcohol and 65 mL mesyl chloride, then the water phase being extracted with dichloromethane (3 × 100 mL); for the substitution, the reaction at 80 °C for 2.5 h with metallic sodium and sulfonate (at a ratio of 8 g:100 g); and for the hydrolysis, reaction at 80 °C for 2.5 h with NaOH and dihomo dioate (at a ratio of 50 g:100 g). The four reactions gave yields that exceeded 90% for each step. Finally, crystallization and decarboxylation provided DGLA in an overall yield of 60% and >95% purity.     

香菇酱发酵工艺条件的研究

在发酵法生产香菇酱的工艺中,首先对制曲工艺条件进行了选择研究,采用正交试验设计对发酵工艺条件进行了优化.结果表明,制曲最适工艺条件为制曲料液比1:1.5、制曲温度32℃、制曲时间48 h,发酵最佳工艺条件为发酵温度40℃、盐水浓度15%、盐水用量1:1.2,在此工艺条件下发酵产品香菇酱的氨基酸含量为4.63%.