RGB-D图像中的分步超像素聚合和多模态融合目标检测

目的 受光照变化、拍摄角度、物体数量和物体尺寸等因素的影响,室内场景下多目标检测容易出现准确性和实时性较低的问题。为解决此类问题,本文基于物体的彩色和深度图像组,提出了分步超像素聚合和多模态信息融合的目标识别检测方法。方法 在似物性采样（object proposal）阶段,依据人眼对显著性物体观察时先注意其色彩后判断其空间深度信息的理论,首先对图像进行超像素分割,然后结合颜色信息和深度信息对分割后的像素块分步进行多阈值尺度自适应超像素聚合,得到具有颜色和空间一致性的似物性区域;在物体识别阶段,为实现物体不同信息的充分表达,利用多核学习方法融合所提取的物体颜色、纹理、轮廓、深度多模态特征,将特征融合核输入支持向量机多分类机制中进行学习和分类检测。结果 实验在基于华盛顿大学标准RGB-D数据集和真实场景集上将本文方法与当前主流算法进行对比,得出本文方法整体的检测精度较当前主流算法提升4.7%,运行时间有了大幅度提升。其中分步超像素聚合方法在物体定位性能上优于当前主流似物性采样方法,并且在相同召回率下采样窗口数量约为其他算法的1/4;多信息融合在目标识别阶段优于单个特征和简单的颜色、深度特征融合方法。结论 结果表明在基于多特征的目标检测过程中本文方法能够有效利用物体彩色和深度信息进行目标定位和识别,对提高物体检测精度和检测效率具有重要作用。     

An efficient human detection method for multi-pedestrian tracking

Traditional human detection using pre-trained detectors tends to be computationally intensive for time-critical tracking tasks, and the detection rate is prone to be unsatisfying when occlusion, motion blur and body deformation occur frequently. A spatial-confidential proposal filtering method （SCPF） is proposed for efficient and accurate human detection. It consists of two filtering phases： spatial proposal filtering and confidential proposal filtering. A compact spatial proposal is generated in the first phase to minimize the search space to reduce the computation cost. The human detector only estimates the confidence scores of the candidate search regions accepted by the spatial proposal instead of global scanning. At the second phase, each candidate search region is assigned with a supplementary confidence score according to their reliability estimated by the confidential proposal to reduce missing detections. The performance of the SCPF method is verified by extensive tests on several video sequences from available public datasets. Both quantitatively and qualitatively experimental results indicate that the proposed method can highly improve the efficiency and the accuracy of human detection.     

Simulation Analysis on in Bus Enclosure the Circulating Current of the 550kV GIS

为解决GIS母线外壳环流带来GIS设备局部发热,加速绝缘的老化,特别是GIS外壳与地网回路中感应的入地电流造成的安全问题,通过对550kV分体结构GIS稳态运行情况下外壳感应电流的计算,研究了GIS基本设计参数对外壳感应电流的影响．计算结果表明,在考虑制造成本和其他安全要求的同时,设计时应尽量缩短GIS的相间距离,增加GIS外壳半径,增加GIS外壳接地点,减小GIS外壳接地点间距,以减小GIS外壳与地网回路中感应环流．同时,考虑到GIS端部接地点分流压力较大,在GIS接地的设计中,应适当加宽GIS端部接地点的接地引下线．     

龙头桥水库防洪与兴利研究

龙头桥水库总库容6.146亿m3,但调节库容尚不足3亿m3,为多年调节水库.怎样合理的利用水库水资源,更合理地确定水库汛限水位问题显得十分必要和紧迫.对于水库来说,在确保水库安全的前提下,科学合理地调整汛限水位,增加兴利库容是解决水资源供需矛盾的一项十分重要的措施.文章分析了龙头桥水库防洪与兴利的关系,为龙头桥水库防洪与兴利提供合理的解决方案.     

Object tracking algorithm using objectness detection

To solve the tracking drift problem caused by the low discrimination of object appearance information in complex environment, the paper proposes an object tracking algorithm using objectness detection. First, the algorithm obtains the preliminary object prediction state with kernelized correlation filters. Then, according to the objectness detection principle of the proposal bounding box, it generates the original proposal bounding box set with the consideration of the scale and aspect ratio, and further gets optimized sets with the refined selection criterion. By introducing motion continuity, the prediction location and scale based on the proposal bounding box are calculated, and then the final optimum object state estimation is acquired comprehensively. Finally, taking into account the occlusion influence judge of target appearance at the current frame, the corresponding template updating scheme is given. Experimental results demonstrate that the novel algorithm achieves robust tracking performance in various typical testing scenarios.     

基于灰色预测模型和粒子滤波的视觉目标跟踪算法

结合灰色预测模型和粒子滤波,提出一种新的视觉目标跟踪算法.由于粒子滤波未考虑先验信息对建议分布产生的指导作用,不能很好地逼近后验概率分布,对此,采用历史状态估计序列作为先验信息,建立该序列的灰色预测模型来预测产生建议分布.与粒子滤波、卡尔曼粒子滤波和无迹粒子滤波进行对比实验,结果表明所提出的算法在视觉目标跟踪中具有更好的性能.     

UCC万吨级水泥生产线的设计及其特点

UCC 10 000 t/d熟料水泥生产线设计与建设的要求高、工期短、气候条件恶劣。其主要技术方案为:(?)中110 m石灰石预均化堆场全部采用大跨度网架结构;生料磨为集烘干和粉磨于一体的LM60.4型辊式磨;生料均化库采用新型IBAU型均化库;窑尾采用双列CDC五级旋风预热预分解系统;从回转窑与分解炉连接处引出旁路,放风量为5%;熟料冷却采用IKN新型高效篦冷机;出冷却机的熟料经两段盘式输送机送入两Φ60m×20m熟料库中储存;水泥粉磨系统采用2台LM56.3 3C型立磨;水泥库采用新型IBAU型均化库。以上方案又有各自的技术特点,比如熟料烧成采用成都院自行开发设计、具有自主知识产权的新型双列五级低压损低氮型预分解系统和目前国际上最大的Φ6.2×96 m回转窑。     

水泥工业回转窑处理污泥方案的研究

利用水泥工业回转窑处理城市污泥是可行的,具有传统处理方法无法相比的优点和前景。利用烧成系统废气余热烘干污泥内水分,提出的废气烘干工艺和流态化焚烧工艺方案的优点是可以充分利用烧成余热并降低烧成系统对一次能源的需求。     

国内外丁苯橡胶发展态势分析

介绍了国内外丁苯橡胶的生产能力、产量、消耗量及我国丁苯橡胶的进出口情况，分析了国内外丁苯橡胶的市场及价格趋势以及我国丁苯橡胶的结构状况，提出了我国丁苯橡胶的发展建议。     

噪声相关情况下说话人跟踪方法

利用滤波方法进行说话人跟踪时,过程与观测噪声相互独立的假设容易产生误差偏移,导致跟踪精度降低.针对这一问题,以高斯噪声为背景,在重要性权重条件最小方差意义下推导了噪声相关情况下的滤波步骤,并将该方法应用到说话人跟踪问题中.仿真实验表明,该方法较好地改善了噪声相关情况下的非线性跟踪问题,有效地提升了说话人跟踪方法的适应性和抗干扰能力.