某汽车高光格栅注塑缺陷分析与成型优化

基于Moldflow软件,针对具有复杂曲面的免喷涂高光注塑格栅可能出现缺料、困气和泛白等的外观缺陷,通过局部优化渐变壁厚、优化布置顺序阀热流道系统、改变局部熔体流动方向的设计方法,进而消除产品外观缺陷。经过实际生产验证,制备的高光格栅产品外观品质较优,可实现量产,且大幅降低了产品的报废率,节约了制造成本。     

基于格子波尔兹曼模型的内镜图像高光修复

在内窥镜检查中,由于器官内腔粘膜表面黏液对光源的反射,高清图像中常常存在高光。高光的修复对内窥镜检查和诊断具有重要的临床意义。本文提出一种基于四元数和格子波尔兹曼模型的高光修复方法,首先通过四元数表达高清图像的彩色信息,然后利用四元数旋转操作表达两个像素的色差,并将色差引入到格子波尔兹曼模型的松弛因子设计中,最后利用格子波尔兹曼模型的扩散实现高光的修复。实验结果表明,该方法修复高光效果更好,局部区域细节保持效果提升了50%,颜色保持效果提升了5倍。     

Effect of hypertext highlighting on browsing,reading, and navigational performance

Reading hypertext documents is more difficult than reading traditional linear text. Text highlighting plays the role of encoding for reading comprehension and may play the roles of contextual cues and landmarks for hypertext navigation. The purpose of this study was to examine the effect of text highlight and organizing highlighted text into a hierarchical structure on browsing, reading, and navigation performance in a network hypertext system. A randomized experiment was conducted. Ninety participants were randomly assigned to three conditions: a reading system with text highlighting, with text highlighting and organizing highlighted text, and without any aids. Dependent variables included browsing performance: time spent and the length of navigational path for reading; reading performance: recall and inference scores, navigational performance: scores of landmark and route knowledge and time spent and the length of navigational path for completing nine navigational tasks. The results showed that text highlight did not improve reading and navigational performance. By contrast, organizing highlighted text yielded significantly worst performance in reading and navigation. According to the results, we propose several suggestions for the design of reading instruction and digital highlighters.     

Estimation of illuminant chromaticity based on highlight detection for face images with varying illumination

Illuminant chromaticity estimation is required in the fields of the tracking and recognition of human faces, compensation and detection of skin color, image reproduction, and color constancy. This article proposes a simple and effective method to estimate the illuminant chromaticity using highlights from the face region. We first select the candidate points through the detection of highlights around the leftmost pixel of the rg chromaticity space from the facial images under various illuminant conditions and then estimate the illuminant chromaticity by averaging the chromaticities of the candidate points. To enhance the illuminant chromaticity estimation accuracy, we propose a more elaborate estimation method, which effectively readjusts the candidate points of the highlight regions according to the conditions derived from two ethnic and three illuminant groups. The experiment results show that our proposed method reliably estimates the illuminant chromaticity under various color temperatures and illuminant directions. © 2012 Wiley Periodicals, Inc. Col Res Appl, 39, 188–199, 2014     

Interpolation-tuned salient region detection

Image salient region detection is very useful in many multimedia applications,such as image retrieval,adaptive content delivery,and adaptive compression.Most existing methods are based on centersurround diferences,usually detecting the diferences around region boundaries,so these methods emphasize the high-contrast edges instead of detecting the regions.Diferent from traditional methods,our method smoothly propagates salient region information to the whole image by performing color interpolation and produces such saliency maps that uniformly highlight the whole salient regions and have high contrast between salient regions and backgrounds.We compare our method with five state-of-the-art salient region detection methods on a large public data set.The proposed method not only generates visually reasonable results but also achieves higher precision and better recall rates.     

建设项目工程造价管理概要

建设工程项目管理中，在确保工程质量的前提下，如何有效地进行工程造价控制，降低工程造价，是投资者比较关注的问题。介绍了建设项目各阶段工程造价控制的要点，并从政策法规、管理体系、人员培养等方面提出了工程造价有效控制的措施。     

基于单幅图像的高光分量可靠去除方法

该文针对目前高光去除算法中存在的颜色失真问题,提出了一种基于MSF图像的局部高光去除算法,并通过一种基于颜色聚类的算法提高了高光区域选取的准确性.实验结果表明,所提出的算法可以解决已有算法中存在的颜色失真,提高了高光分离可靠性.     

声诱饵对尺度目标的回波模拟方法

潜艇回波可以等效成若干个散射亮点回波相干迭加的结果,现代声自导鱼雷基于这一物理事实,通过辨识目标尺度来识别真假目标。提出使用具备数据通信能力的多个点源声诱饵,通过信息交互实现各声诱饵回波发射延时的有序控制,实现对尺度目标的多亮点回波模拟。具体仿真算例表明,该方法对利用方位走向特征和声成像进行目标尺度识别的鱼雷具有对抗效果。     

水声探测系统目标回波信号仿真技术研究

目标回波信号是水声探测系统主要的信息来源,在水声对抗仿真系统中,目标回波信号的仿真数据量又是制约仿真实时性的关键因素之一,因此,必须对目标回波信号进行深入研究,既要真实仿真出实际系统中目标回波信号的所有特征,又要满足仿真实时性的要求。提出了一种针对水声对抗仿真系统的目标回波仿真信号模型,该模型以窄带信号的复包络为基础,综合了实际系统中多普勒频移和频率补偿的影响,更具真实性和实用性。利用该模型具有采样频率低,仿真数据量小的优点,能够满足仿真系统实时性的要求。在水声对抗试验仿真系统中得到了很好的检验,具有广阔的应用前景。     

基于快速双边滤波的图像高光去除研究

在各向异性的物体中,高光被视为是漫反射分量以及镜面反射分量的一种线性组合。单幅图像的高光去除是计算机视觉中一项非常有挑战性的课题。很多方法试图将漫反射分量、镜面反射分量进行分离,然而这些方法往往需要图像分割等预处理过程,方法鲁棒性较差且比较耗时。基于双边滤波器设计了一种高效的高光消除方法,该方法利用最大漫反射色度存在着局部平滑这一性质,使用双边滤波器对色度的最大取值进行传播与扩散,从而完成整幅图像高光去除。方法采用一种加速策略对双边滤波器进行速度优化,与目前流行的方法相比,有效提升了方法的执行效率。与传统方法相比,该方法高光去除效果更好,处理速度更快,非常适用于一些实时应用的场合。