红外车辆目标的自动模糊分割

针对红外图像的特点,提出了一种基于遗传算法的自动模糊分割红外车辆目标图像的方法.首先选取图像的感兴趣区域以加快运算速度;然后对感兴趣区域图像进行模糊增强,借助于二维OTSU方法对增强后的感兴趣区域进行阈值分割,为了加快分割算法的速度,先限定一个最佳阈值范围,再利用遗传算法在此阈值范围内自动搜索最佳分割阈值;为了弥补单独利用二维OTSU方法分割的不足,采用缩短模糊边缘宽度的方法来提取感兴趣区域红外车辆目标图像的边缘.最后把二维OTSU方法分割的图像与模糊边缘提取得到的边缘图像进行或运算后进行填充以得到最终的车辆目标分割图像.实验结果表明,对于红外车辆目标图像,一维OTSU和二维OTSU算法只是基本分割出了红外车辆目标的主体,而本文提出的自动模糊分割技术不仅准确分割出了红外车辆目标的主体,而且对于坦克的模糊炮塔亦得到了完整的分割.     

多阈值S-F的光照不均图像分割

针对钢管识别统计系统开发中,图像分割环节易受光照不均匀影响的问题,以及对图像增强处理后再分割导致目标错分的不足,本文提出一种多阈值S-F(分割-融合)的图像分割方法。该方法根据改进的Otsu多阈值法,采用形态学操作与图像融合技术,实现堆垛钢管目标的提取。实验结果表明,在光照不均匀情况下,该方法对钢管图像的分割效果明显优于传统方法,具有不受光照优劣程度影响、适应性强的特点,可应用于机器视觉领域的目标识别。     

结合数学形态学和Level Set超声图像的分割方法

针对噪声严重的超声图像,提出了一种结合数学形态学和Level Set的分割方法。首先采用全变差模型进行图像滤波,再通过交互式区域选择和数学形态学方法获得感兴趣目标的二值化图像,并把该二值化图像轮廓作为水平集方法的初始曲线。改进隐式测地活动轮廓模型(GAC)中的边缘检测函数,增强了处理弱边缘的能力。分割结果表明,该方法能够准确地提取出目标轮廓,同时减少了迭代次数和运算时间。     

灰度形态学滤波的红外运动小目标检测方法

针对空中红外图像中运动小目标的特征，提出一种采用灰度形态学滤波的背景抑制方法对图像进行处理，再利用自适应阈值分割方法对图像进行阈值分割的帧内检测方法；实践证明该技术能有效提高图像的信噪比，从而达到有效分割和快速检测小目标的目的。     

复杂场景多传感器图像的多目标分割算法

综合应用多传感器图像灰度分布特征和分形维数特征进行目标检测、应用动态边缘演化提取目标轮廓,有效解决了复杂场景多目标分割的难题.首先根据图像的内在属性应用指定直方图进行图像增强,随后分别对可见光图像应用分形维数特征、对红外图像应用最大熵法、对激光雷达图像应用局部阈值法进行兴趣区域提取;再将各传感器图像获得的兴趣区域进行交叉验证,进一步排除背景干扰;最后把经过综合处理的目标轮廓估计作为初始生长曲线应用动态边缘演化技术最终确定目标边缘.对大量的复杂场景多传感器图像测试表明,本文提出的方法较好地保留了目标的形状特征,是一种有效的多目标分割技术.     

SAR图像目标边界流和边沿流特征提取

本文将目标边界流特征和目标边沿流特征的概念和边缘特征提取的方法用于SAR图像的目标检测和识别这个方法先采用中值滤波、自动图像分割、数学形态学二值滤波、十字模板边缘提取方法,获得目标单像素边缘再对所得边缘采用边界跟踪、边界流信息熵和边沿流信息熵运算,得到边界流特征和边沿流特征.对测试图像和真实SAR图像进行了实验,结果表明,该方法能很好地描述目标的特征,编程简单、运算速度较快.     

基于计算机视觉测量技术的图像轮廓提取方法研究

图像分割与轮廓提取是计算机视觉测量技术的关键环节。针对传统边缘检测方法中存在的问题，结合计算机视觉测量技术的特点，提出了一种实用的轮廓提取方法。该方法采用灰度阈值法进行图像分割，并用数学形态学方法对二值图像进行缺陷修补，通过链码跟踪存储轮廓信息，实现了具有单像素边缘的图像轮廓提取。文中给出了关键技术的原理及实现方法。实验表明，与经典的边缘检测方法相比，此方法具有抗干扰性强、精度高等特点，能满足工程测量的实际需要。     

矿岩爆破图像二值化分割技术的研究与选择

爆破块度图像分析法是当前爆破块度统计的重要方法,图像分割技术是该分析方法的关键与难点。针对爆堆及块石图像的特殊性,研究了基于二值化的矿岩爆破图像分割技术,分析了阈值分割、区域生长分割、标记分水岭分割等当前主要的图像分割方法。通过研究图像上同一截面灰度值切片的变换与矿块实际边缘的吻合程度,发现数学形态学分割方法得到的二值图像边界清晰、断点少,相对于门限法更适用于爆破块度图像,其生成的二值化图像层次清晰,便于像素特征的提取。图像分割先进技术的应用,对于实现矿岩爆破图像块度分析的智能化提供了广阔的空间。     

基于小波变换与形态学的车牌定位方法

针对信号噪声环境下的车牌定位问题,提出了一种基于小波变换和数学形态学的图像定位方法.该方法先用自适应滤波多尺度边缘检测方法检测出车牌的边缘;然后用数学形态学方法对阈值二值化后的边缘图像进行系列形态运算,进一步消除无用信息;最后用基于车牌底色识别的方法进行车牌定位.实验结果表明,该方法定位效果好,适于有噪声的车牌图像进行定位.     

亮背景下形态学星点目标提取算法

为了有效提取星图中星点小目标,实现提高星图识别效率及姿态计算的精度,本文在分析星点目标和小目标像共性的基础上,采用了一种形态学星点提取方法.该方法根据数学形态学运算的特点,得到估计的星图背景,通过灰度形态学Top-Hat变换对消背景,得到含有目标和高频噪声的图像,本文采用自适应阈值法确定实际图像的阈值.实验结果表明此方...     

Effect of Permeable Crystalline Material on Steel Reinforcement Corrosion of Concrete

Permeable crystalline materialcan permeate into pores and cracks of concrete and catalyze the reaction between Ca(OH) 2and unhydrated cement to generate a great quantity needle non-soluble crystals, which can stop up the pores and cracks of concrete, and increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with permeable crystalline material as well as mixed with the permeable crystalline material. The properties evaluated for corrosion test were water impermeability, water absorption, compressive strength and potential. The results of water impermeability, water absorption, compressive strength clearly showed that the permeable crystalline material could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and other problems, and it did increase the compressive strength, which was favorable for protection of corrosion of reinforcing steel. Moreover, it was concluded from the potential-time curve that the steel reinforcement of uncoated specimen was in the state of activation whereas that of other specimens coated and mixed with the permeable crystalline material was in the state of inactivation. Above all, it was indicated that the permeable crystalline materialis very effective to protect the steel reinforcement of concrete from corrosion.     

The Research and Application About "Dry Peeling Off" Technology for Airplane Surface Paint Layer

In this paper, the principle of spurting take off lacquer were introduced; and with orthogonal method the unsaturate polyester was prepared ;it was easy to peel airplane paint layer off with this material and equipment.     

Quality Study of Honeycomb Core Shaping Without Wax Stabilization

Sandwich panels utilizing honeycomb cores result in lightweight, high-strength units that are very rigid. Indeed, they give honeycomb panels the best strength-to-weight ratio of any construction type available. Conventionally, the wax is poured into the cell of the core to strengthen the structure and prevent the core from being crushed during milling. Much time and labor is required to wax, mill, and clean the cores. In this study, the process of pouring wax into the core was skipped. In other words, the cutter directly milled the core. Experiments showed that the compressive strength of the core produced without wax stabilization was only 3% lower than that of cores produced using the traditional method. In addition, the drum peel strengths of cores produced without wax stabilization were 38.4% higher than cores produced using the traditional method, in which residual wax seriously polluted the adhesive. It was also found that eliminating the wax process can reduce costs.     

In-process thermal treatment of polylactic acid in fused deposition modelling

Polylactic acid (PLA) is one of the most widely used open source fused filament fabrication materials due to its ease of extrusion, biodegradability, and mechanical strength. The mechanical strength of PLA largely depends on the proper growth of its semi-crystalline structure, which can be severely impaired by a low rate of crystallization, particularly in open source printers. This can be further aggravated by the non-uniform thermal distribution of heat that causes improper curing among the extruded beads of the printing material. As a result, PLA printed on open source printers does not achieve the best mechanical properties. This research, for the first time, proposes an additive-free solution implemented through a detailed set of experimentation to improve the curing rate through in-process temperature variations to cure the joints among the beads. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy is used to confirm the improvements in the bead joints. This work is conducted in two phases of experiments. In the first phase, a full factorial ANOVA is used to investigate various process parameters and the important variables are used in the second phase to print test specimens in four different sets.     

Investigation of the Corrosion Behaviors of HVOF-Sprayed Carbide Cernet Coatings in Molten Al-Zn-Si Alloy Bath

In continuous hot-dip galvanization process the corrosion and chemical stability of the sink roll in the galvanizing bath are important problem which effects on the quality and productivity. In order to protect the sink roll the carbide cermet and/or ceramic coatings were deposited on the surface of the sink roll. The WC-, Cr3 C2-cermet coatings were deposited by high velocity oxygen fuel (HVOF) spray, respectively. The coating samples were immersed in molten Zn-alloy containing 50 wt % aluminum at 833 K for 24 hr and 144 hr, respectively. The inter-diffusion and inter-reaction of Zn, Al and elements in coating and corrosion behaviors of these coatings were investigated by XRD, SEM and EPMA etc. The corrosion mechanisms of the carbide cermet coatings and ceramic coatings in molten High Al-Zn-alloy were approached.     

Fundamental study of adhesion of ice to cooling solid surface (Discussion on influence of copper oxide layer on ice adhesion force)

In many situations, ice often adheres to a cooling solid surface, frequently causing serious accidents. It is critical to clarify the mechanism of ice adhesion to the cooling surface in order to prevent ice adhesion. In a past study, the shearing stresses of two kinds of test plates with a copper surface having the higher thermal conductivity were measured. The shearing stress corresponds to ice adhesion force. Both shearing stresses were significantly different; however, the cause remains unclear.Therefore, the present study focuses on an oxide layer as the main factor causing the difference of both shearing stresses; the influence of the oxide layer formed on shearing stress was discussed. And in the removal and reformation processes of the oxide layer, the time variation of the shearing stress was clarified. Moreover, the relationship between the state of the copper surface and the shearing stress was also clarified by surface analysis.     

重塑标准推行格局 推动LED照明的普及（英文）

正When you are enjoying the green,energy-saving and healthy lighting of IKEA LED luminaire,you may not realize that most of IKEA’s LED bulbs are produced by the LED luminaire smart manufacturing system of Hangzhou Zhongwei Photoelectricity CO.,LTD(ZVISION).No longer enclosed in the laboratory,the product standards are brought into the factory workshop and even to the entire production process.Thus,the standards are promoted and applied in a favorable way by enterprises,benefitting consumers with high quality products.     

Chinese Experts Contribute to ISO＇s New Toy Standards

正The international standard,ISO 8124-6,Safety of toys–Part 6:Certain phthalate esters in toys and children’s products,was officially issued by ISO worldwide on August 15.It was the first time for Chinese experts to lead the ISO standard development in toys industry.The standard was drafted by a group of Chinese experts from SAC/TC for toys and relevant Chinese departments and finally completed by a dedicated international group of experts.ISO 8124-6 makes a substantive breakthrough in the aspects of the scope of toys,limitation of plasticizer types,control of test cost,accuracy of test,operation convenience,etc.,offering the operational guidance for toy manufactures and testing laboratories.     

中国质量(北京)大会(英文)

正Themed on"quality,innovation,development",the first China Quality Conference(Beijing)was held in the Great Hall of the People on September 15.Chinese Premier Li Keqiang delivered an important speech at the conference.State Councilor Yang Jing and Wang Yong attended the conference with over 600 domestic and international representatives from foreign,regional and international quality organizations     

National Working Meeting on Land and Resources Standardization

正The National Working Meeting on Land and Resources Standardization was held in Beijing on July 15,2014.Wang Min,the Deputy-Minister of the Ministry of Land and Resources,and Yin Minghan,the Chief-Engineer of SAC addressed the meeting.Representatives from relevant competent departments and technical committees were present.The meeting aims to summarize work,discuss existing problems and make clear working thoughts,promoting standardization work of land and resources to a new level.Wang Min pointed out that the standardization work of land and resources should be centered on the basic principles of"protecting land and resources dutifully,intensively and economically utilizing land and resources,and making all-out efforts to safeguard the public’s rights and interests",highlighted the