基于改进联合模型的人脸表情识别

在联合主动表观模型和主动形状模型的基础上,充分挖掘标定点之间的联系,提出一种局部纹理模型构建方法。通过改进匹配算法提高特征点的定位精度和匹配速度。将该算法提取到的人脸表情特征输入最近邻分类器,分类结果表明其识别率较高。     

Preparation and characterization of highly ordered NiO nanowire arrays by sol-gel template method

Highly ordered nickel monoxide （NiO） nanowire arrays were fabricated by sol-gel synthesis within the pores of anodic alumina membrane （AAM）. Scanning electron microscopy （SEM）, high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD） were used to characterize the topography and crystalloid structure of NiO nanowire arrays. The length and diameter of the NiO nanowires depended on the thickness of the AAM and the diameter of the pores. The results indicated that the NiO nanowires were uniformly assembled into the ordered nanopores of the AAM and paralleled to each other. Nickel monoxide nanotubes were also fabricated with the same method by changing the immersing time. This new method to prepare NiO nanowire arrays may be important from gas sensors to various engineering materials.     

表面包覆法制备高固相含量SiC悬浮液的研究

本工作试图通过有机包覆的方法改善SiC粉在水中的表面胶体特性,制备高固相体积分数的SiC粉体悬浮液。以制备的悬浮液的固相体积分数为衡量标准,分别确定了APS和PAAM包覆过程最佳条件．（1）APS包覆：时间为5h,温度90℃,APS的质量分数为5％,此条件下可以制得固相体积分数为45％的SiC悬浮液;（2）PAAM包覆：时间为5h,温度30℃,AAM的质量分数为2％,在此条件下可以制得固相体积分数为50％的SiC悬浮液．     

界面酸碱配位作用对粘合性能影响的研究

通过测定参照液在固体表面的接触角并计算接触体系的粘附功及其酸碱作用成份,研究了带碱性基团的丙烯酰胺——天然橡胶接枝聚合物和带酸性基团的丙烯酸——天然橡胶接枝聚合物表面的酸碱配位作用及其对粘合性能的贡献.     

A Unified Gradient-Based Approach for Combining ASM into AAM

Active Appearance Model (AAM) framework is a very useful method that can fit the shape and appearance model to the input image for various image analysis and synthesis problems. However, since the goal of the AAM fitting algorithm is to minimize the residual error between the model appearance and the input image, it often fails to accurately converge to the landmark points of the input image. To alleviate this weakness, we have combined Active Shape Models (ASM) into AAMs, in which ASMs try to find correct landmark points using the local profile model. Since the original objective function of the ASM search is not appropriate for combining these methods, we derive a gradient based iterative method by modifying the objective function of the ASM search. Then, we propose a new fitting method that combines the objective functions of both ASM and AAM into a single objective function in a gradient based optimization framework. Experimental results show that the proposed fitting method reduces the average fitting error when compared with existing fitting methods such as ASM, AAM, and Texture Constrained-ASM (TC-ASM) and improves the performance of facial expression recognition significantly.     

不同结构镍纳米线阵列的制备及其磁性

采用直流电沉积在多孔有序氧化铝模板中制备了不同结构的有序镍纳米线阵列。采用SEM和TEM对所制备的镍纳米线的形貌和结构进行了表征。研究了镍纳米线不同结构对镍纳米线阵列磁性性能的影响规律．当电沉积电压为2．5V时制备的镍纳米线为多晶结构；电沉积电压4V时，镍纳米线为沿[220]择优取向的单晶结构；电沉积电压＞5V时，择优取向由[220]转为[111]方向．磁滞回线结果表明，单晶镍纳米线阵列与多晶纳米线阵列相比具有更高的矩形度，沿[111]择优取向的单晶纳米线相比沿[220]取向的单晶镍纳米线具有更大的矩形度，表现出显著的磁各向异性。     

论空空反导弹武器

从作战飞机自身防御的角度出发 ,详细论述了防御空空导弹攻击的方法和策略 .提出了空空反导弹武器的概念 ,并详细论述了空空反导弹武器的特性 ;针对我国的实际情况提出了优先发展空空反导弹武器的建议     

用于大库人脸识别的脸型分类研究

提出了一种基于”分集”的人脸识别方法,该方法在人脸识别前加入脸型预分类环节,将一个大规模的人脸数据库分解为依脸型分类的若干个子库。这样做一方面可通过分集降低后续识别处理的数据量,提高人脸识别的速度,另一方面可利用脸型特征对候选人脸集合进行粗筛选,降低系统的错误接受率。为了实现脸型分类,进一步提出了一种基于人体测量学的分类方法,即首先借助AAM技术提取脸部特征点,然后在此基础上计算面型指数,并由此实现对脸型的分类。对较大规模的人脸数据库所进行的实验结果表明,所提出的方法可有效提高人脸识别系统的识别率和识别速度。     

空空导弹多目标测试系统研究

通过试验室手段对导弹进行多目标攻击测试考核,能够及时评估导弹攻击能力,尽早暴露问题。文中首先阐述了实现多目标攻击技术的机理和要素,探索性的提出了一种基于反射内存光纤网络并在试验室环境下能够模拟空中实战条件对导弹进行测试、考核的多目标测试系统研制思路,重点研究对比了两种实施方案的可行性,并就涉及到的关键技术途径进行了探讨。