Precise glasses detection algorithm for face with in-plane rotation

This paper proposes an accurate glasses detection algorithm for in-plane rotated faces. Firstly, to normalize the face with in-plane rotation to be an upright one, this paper proposes a new set of ±26.565° haar-like features which can be calculated quickly to represent the features of rotated faces. With these new features, we address to build different rotated detectors by rotating upright face detector directly so as to achieve in-plane rotated face detection. Secondly, according to the rule that the objects with fixed and complex structure in a simple background are much easily to be detected, as the eyes have much complex structure in the face, we propose to detect the eyes for minimizing the glasses searching region. Because the nosepiece region of the glasses has much fixed structure and simple background, we use this part to train a new detector with the haar-like features and AdaBoost algorithm for precise glasses detection. This approach accomplishes glasses detection for in-plane rotated face with high speed and precision. The experimental results on the CMU-MIT, BioID, and CAS-PEAL-R1 face databases demonstrate that the algorithms for face, eye and glasses detection yield accurate results and maintain the speed advantage.     

本科生参与药物化学课题研究的几点思考

高校人才的培养模式已经逐渐从传统的被动式传授变为更倾向于鼓励学生参与实践,学以致用。药物化学作为一门实用性极强的学科更是如此。本文以实际的案例讲述了本科生参与药物化学课题研究过程培养方案、具体实施过程并展示了部分科研数据,着重阐述如何通过教师的规范培养提高本科生科研能力,并在经验中总结出本科生参与相关科研课题的几点建议。     

热处理对TaN薄膜微结构及电性能的影响

采用直流磁控溅射制备TaN薄膜,研究了热处理对TaN薄膜微结构及电性能的影响.结果表明,退火温度及退火时间都将影响薄膜的微结构及方阻.随退火温度的升高和时间的延长,TaN薄膜的方阻逐渐增大,但当退火温度高于800℃时,由于氧化严重导致薄膜的方阻异常增大.退火可显著改善薄膜的TCR,制备态TaN薄膜的TCR值为-1.2X10-3,薄膜经800℃退火30min后,其TCR可降低到-7.0x10-4.     

磁场对丙酮-水-三氯乙烷物系萃取过程的影响

In order to investigate the effect of magnetic field on the liquid-liquid extraction, the extraction in the acetone-water-trichloroethane system was studied under magnetic field with different magnetic induction intensity.The results showed that the effect of magnetic field was positive in the extraction process, and the partition coeffi-cient and the yield of acetone increased-with the increasing magnetic induction intensity by 5.16%-8.35% and 1.85%-5.70% respectively. The effect of magnetic field on the extraction was intensified when the temperature became, higher. The experimental data of the partition coefficient of acetone were correlated by the method of least square in terms of a power-law correlation.     

新试剂1,4-双肼酞嗪与镍显色反应的研究及应用

在ｐＨ８～９的ＮＨ_３·Ｈ_２Ｏ－ＮＨ_４Ｃｌ缓冲溶液中,有氯化十六烷基吡啶（ＣＰＣ）存在下,新显色剂１,４－双肼酞嗪（ＤＨＰＨ）与镍形成稳定的１：１蓝绿色水溶性络合物．其最大吸收波长λ_ｍａｘ＝６９０ｎｍ,表观摩尔吸光系数ε=２．１５Ｘ１０ ~４镍量在０～ ５６μｇ／２５ｍＬ范围内服从比尔定律,本方法操作简便快速,结果稳定,选择性好,已用于铝合金中痕量镍的测定,结果满意．     

Al2O3—TiC—Co改性陶瓷的性能及其耐磨性

以化学沉积的方法,在陶瓷体Ａｌ２Ｏ３,ＴｉＣ的表面均匀包覆一层Ｃｏ膜。混合球磨后经热压烧结的Ａｌ２Ｏ３－Ｔｉｃ－Ｃｏ（ＡＴＣ）改性陶瓷的强度和断裂韧性比Ａｌ２Ｏ３－ＴｉＣ提高约４０％。并对Ａｌ２Ｏ－ＴｉＣ－Ｃｏ和Ａｌ２Ｏ３－ＴｉＣ陶瓷的磨粒磨损行为、磨损机理和磨粒磨损耐磨性进行了比较。结果表明,Ａｌ２Ｏ３－ＴｉＣ－Ｃｏ陶瓷的耐磨性明显好于Ａｌ２Ｏ３－ＴｉＣ陶瓷,磨损表面呈现较多的塑性变形。     

实验设计在合成乙二醛中的应用

对催化硝酸氧化乙醛合成乙二醛进行了研究。通过均匀设计与正交实验考察了引发剂用量、硝酸浓度、硝酸与乙醛比例、反应温度、反应时间、硝酸滴加速度、复合催化剂MAS-2配比及用量等因素对反应生成乙二醛的选择性和单程收率的影响。结果表明：反应生成乙二醛的选择性71.8%,单程收率48.5%。     

基于局部仿射配准的鲁棒非刚体配准算法

针对传统点集非刚体配准算法对复杂局部形变数据配准精度低,收敛速度慢等问题,该文提出一种基于局部仿射配准的鲁棒非刚体配准算法。该算法采用分层迭代的方式由粗到精地完成点集的非刚体配准。在每层迭代中,首先对子形状点集集合和子目标点集集合进行分块处理并更新分块后每一类子点集的形状控制点。然后利用控制点引导仿射迭代最近点(ICP)算法求解对应子点集间的局部仿射变换。接着利用上一步求解的局部仿射变换,更新子形状点集集合及其形状控制点集合。直到配准误差收敛时,循环结束并输出更新后的形状点集。实验结果表明,所提算法与传统点集非刚体算法相比具有更强的精确性和收敛性。     

松辽盆地肇源—太平川地区扶余油层砂岩储层特征、成因及预测

根据大量的岩心观察、薄片鉴定和储层物性分析资料,对松辽盆地肇源—太平川地区扶余油层砂岩储层的成岩作用类型和成岩序列、储层孔隙类型和成岩—孔隙演化、储层物性主控因素进行了系统的研究,指出三肇凹陷砂岩储层的硅酸盐颗粒溶孔尤为发育,见有次生溶孔发育带,对孔隙的贡献率可以达到10%。由此导致工区发育两类有效砂岩储层:一是残留原生粒间孔型储层,分布于长春岭背斜带、朝阳沟阶地、太平川构造及尚家构造一带;二是次生溶孔与残留原生粒间孔混合型储层,分布于三肇凹陷,次生溶孔的发育提高了有效储层的下限。     

基于GIS的城市雨洪模型SWMM二次开发研究

以广州市新河浦社区为例,采用双层排水系统,利用SWMM模型的开源数据接口,实现了在VisualBasic 6.0平台下SWMM模型与ArcGIS的集成,构建了基于GIS平台的内涝模拟模型,并分析了不同暴雨重现期下的淹没情况。结果表明,该模型具有较好的精度和可靠性。