松子制取松子油及其微胶囊化的研究

通过浸出法制取松子油，并进一步测定其理化性质，用气相色谱法分析松子的油的主要脂肪酸组成，表明其含有高度的不饱和脂肪酸，精炼后的松子油进行微胶囊化。     

OptimalParameters of Response Surface Methodology for Preparation of Magnesium Hydroxide Flame Retardant

The yield of magnesium hydroxide was investigated via response surface methodology using bischofite and aqueous ammonia as raw materials. The experimental results indicated that the effects of reaction temperature, magnesium ion and aqueous ammonia concentrations on the yield of magnesium hydroxide gradually decreased. In particular, reaction temperature and magnesium ion concentration had a significant influence on the yield. After the regression and fitting of the response value and each factor, the regression equation was obtained. As proven by experiments, the predicted value and actual value showed a good fit. The products of the center experiment were characterized by particle size analysis, scanning electron microscopy, and X-ray diffraction. The results show that the morphology is irregular and shows a lamellar structure. The particles have a narrow size distribution ranging from 0.64 to 0.68 mm of D50 size. The difference in particle size of D10 and D90 is less than 0.91 mm, and the purity very high.     

旱冬瓜乙酸乙酯萃取相化学成分研究

对旱冬瓜的化学成分进行了研究,采用硅胶柱层析、重结晶等分离手段进行分离,并用有机波谱学的方法进行结构鉴定。结果得到6个化合物,分别为：香兰素（vanillin,1）、β-谷甾醇（β-sitosterol2,）、胡萝卜苷（daucosterol,3）、β-扶桑甾醇（β-rosasterol4,）、豆甾醇（sterols stigmasterol,5）、没食子酸（Gallic acid6,）。     

一种基于加权的分组协作感知算法

在本文中,描述了一种新的认知无线电协作频谱感知改进算法。本文在现有的分组协作频谱感知结构的基础上,引入一个新的基于加权的分组协作算法。相较于其他的协作感知基于权重的协作在最终的判决中考虑到了根据每一组用户贡献的不同动态的分配权重因子。这样一来,不仅增强及达到更好的感知性能,且感知结果更加精确。在基于权重的协作算法中,可以不用考虑用户数目的不同,因为它对检测结果没有影响。本文通过对瑞利衰落信道使用加权分组协作进行仿真。证明了加权分组协作频谱感知可以提高能量检测概率。     

4×128双色线列红外探测器成像电路设计

介绍了针对4×128双色线列探测器而设计的成像电路系统,其硬件电路主要包括探测器适配电路、视频模拟信号调理电路、模数转换电路、图像预处理电路、数字图像输出接口电路等。探测器驱动时序、一维扫描成像时序、AD采样时序和接口时序由FPGA来实现,采用VHDL语言完成时序设计。     

浅谈单建地下车库现浇混凝土空心楼盖设计

项目建设时,城市建设的规划管理部门现在均要求配有一定数量的地下停车位。为合理利用地下空间,建筑物之间的绿地或广场下面一般均设单建地下车库。由于车库本身要求有一定净高及柱距,如采用梁板式顶板,则可减小车库整体埋深(相对梁板式减小埋深500mm以上),并可产生较好的经济效果。     

在线最小二乘支持向量机及其在C8芳烃异构化建模中的应用

The least squares support vector regression (LS-SVR) is usually used for the modeling of single output system, but it is not well suitable for the actual multi-input-multi-output system. The paper aims at the modeling of multi-output systems by LS-SVR. The multi-output LS-SVR is derived in detail. To avoid the inversion of large matrix, the recursive algorithm of the parameters is given, which makes the online algorithm of LS-SVR practical. Since the computing time increases with the number of training samples, the sparseness is studied based on the projection of online LS-SVR. The residual of projection less than a threshold is omitted, so that a lot of samples are kept out of the training set and the sparseness is obtained. The standard LS-SVR, nonsparse online LS-SVR and sparse online LS-SVR with different threshold are used for modeling the isomerization of C8 aromatics. The root-mean-square-error (RMSE), number of support vectors and running time of three algorithms are compared and the result indicates that the performance of sparse online LS-SVR is more favorable.     

2，6—二叔丁基对苯醌合成工艺研究

研究了2,6－二叔丁基对苯醌的合成工艺,选择了最佳合成方法,即催化分子氧氧化法,该法以2,6－二叔丁基苯酚和氧气为原料,采用自制催化剂,进行气液相氧化,通过多次对比实验,确定了最佳催化剂用量和产品提纯方法,产品收率为70％,纯度大于99．5％。     

子午线轮胎结构温度场分布的三维有限元分析

介绍了子午线轮胎结构温度场的有限元分析方法,并分析了９．００Ｒ２０子午线轮胎在特定条件下的温度场分布,给出了轮胎温度场分布图和温度分布曲线。采用该分析方法可以预测轮胎在工作状态下的温度场,了解轮胎使用时内部的生热情况及可能的破坏行为,以便对轮胎结构及配方进行优化。     

脂环族环氧化物的合成与应用(五) 由四氢邻苯二甲酸酐制备4,5-环氧环己烷-1,2-二甲酸二缩水甘油酯

对由四氢邻苯二甲酸酐制备４,５－环己烯－１,２－二甲酸二缩水甘油酯（７１１）、进而制备４,５－环氧环己烷－１,２－二甲酸二缩水甘油酯（ＴＤＥ－８５）作了研究。探讨了７１１及ＴＤＥ－８５树脂的合成方法及有关影响因素、结构特点与性能的关系以及其相关应用。