基于LNSST与PCNN的红外与可见光图像融合

为了提升红外与可见光图像融合精度,提出了一种局部化非下抽样剪切波变换与脉冲耦合神经网络相结合的红外与可见光图像融合方法。首先,利用局部化非下抽样剪切波对源图像进行多尺度、多方向分解;然后,在分解后的各子带图像中进行块奇异值分解,求取区域特征能量值作为脉冲耦合神经网络对应神经元的链接强度。经过脉冲耦合神经网络点火处理,获取子带图像的点火映射图,通过判决选择算子,选择各子带图像中的明显特征部分生成子带融合图像;最后,应用局部化非下抽样剪切波逆变换重构图像。采用多组红外与可见光图像进行融合实验,并对融合结果进行了客观评价。实验结果表明本文提出的融合方法在主观和客观评价上均优于已有文献的一些典型融合方法,可获得更好的融合效果。     

基于多尺度信息融合的层次聚类算法

在体绘制领域和图像分割中,数据集通常具有流形结构,各部分边界连接紧密且伴随局部噪声,给传统聚类算法的应用带来了较大的困难．本文根据非参数密度估计方法提出了一种基于多尺度信息融合的层次聚类算法．新算法通过整合密度差异和边界信息构造了一种多尺度结构信息融合的相似性度量,通过水平集的图连接策略推导出一种层次化的类结构剖析过程以获取稳定的聚类结果．新算法不受数据集形状、密度类型的限制,无需对数据集进行假设,可自动识别数据集常见的聚类结构特征．同时聚类结果较为稳定,算法对噪声具有较强的鲁棒性．从人工数据集和真实数据集以及应用试验的测试结果可以看出新算法的优越性能．     

基于偏振图像融合的长波红外人脸图像增强技术

针对非制冷型长波红外相机人脸成像模糊的缺点,提出一种基于偏振的红外图像增强方法,该方法在支持度变换基础上有效地将人脸红外偏振信息和红外强度信息相融合.搭建分时偏振成像系统获取红外偏振图像,求解得到红外强度和红外偏振度图像;对它们使用支持度变换方法进行多尺度分解后,采取相应的融合规则进行融合得到最终融合增强图像.实验结果从主观人眼评价和客观参数评价两方面表明,增强图像拥有比红外图像更加丰富的人脸轮廓信息.     

基于分形特征和导引滤波的可见光与红外图像融合算法

为充分利用红外图像的目标指示信息,本文提出了一种基于分形特征和导引滤波的可见光与红外图像融合算法。该算法首先采用分形特征对红外图像中的人造目标进行增强,通过阈值分割得到目标分布图。待融合图像经过一层分解得到近似图像和细节图像,基于目标分布图利用导引滤波分别得到可见光与红外近似图像与细节图像的融合系数。实验结果表明,融合后图像充分结合了可见光图像的背景信息与红外图像中的目标信息,有利于后续的目标识别任务。     

一种子带杂交多算子图像融合算法研究

提出了一种新的多传感器图像融合算法。该算法综合考虑小波同层各子带及相邻层子带分解系数的特征,采用基于图像空间能量窗测度的自适应多算子规则构造融合图像。对可见光与红外图像、可见光与毫米波图像融合试验结果表明,融合图像含有更丰富的信息量,有效地保留了输入图像的互补特征信息。     

一种基于人眼视觉特性的偏振图像融合方法

根据偏振参量图像之间存在的信息冗余性和互补性,提出了一种基于人眼视觉特性的偏振图像融合方法.该方法首先对线偏振度图像和偏振角图像进行基于能量特征的融合,得到偏振特征图像;然后,利用五株采样提升小波变换实现偏振特征图像和合成强度图像的融合;最后,根据人眼对局部对比度敏感的特点,采用偏振度图像对融合结果进行对比度增强处理.实验结果表明,融合后的图像不仅突出了场景的偏振信息,而且包含了丰富的强度信息,目标与背景的对比度也得到了显著增强.     

采用多源图像分形特征的多目标检测方法

针对多目标的检测,本文提出一种采用多源图像分形特征的特征级融合检测方法.首先对多目标检测的特点进行了分析,对分形理论进行了介绍,然后详细介绍了该融合检测算法的思路和原理.该算法首先由红外图像阈值分割出部分目标;然后利用分维数图的统计特征可以增强分形维数的奇异性,在可见光图像的分维数图中搜索与已检测出的目标区域具有相近分形统计特征的区域,进行标记;再根据"距离相似度准则"进行目标的聚类识别,排除背景干扰,最终检测出全部目标.实验结果表明该融合检测算法能有效地进行多目标的检测与识别.     

一种基于Directionlet变换的图像融合算法

为了提高图像融合效果,提出了一种基于Directionlet变换的图像融合算法.首先对已配准的待融合源图像由给定的生成矩阵分别进行陪集分解,得到每个陪集对应的子图;接着将每两个子图相减,得到源图像的高频和低频分量,其中边缘、纹理等奇异特征包含在高频分量中;然后对低频分量采用直接平均融合的方法进行系数选择,对高频分量选择子区域边缘信息较强的系数;最后,通过Directionlet陪集分解的反变换,得到融合后的图像.多聚焦图像融合实验表明,在主观视觉上,该算法明显更好地融合了边缘等图像特征,从而较好地保持了左右聚焦图像各自的细节信息;在客观评价上,通过熵、平均梯度、标准差和互信息量等性能参数比较,该方法也优于小波变换和其他的融合方法.     

基于边缘信息的偏振图像融合算法及评价

偏振遥感图像通常都采用强度、偏振度、偏振角来表征目标偏振特性.本文提出的基于边缘信息的偏振图像融合算法是将三幅偏振图像利用离散小波变换把图像分解成不同尺度的低频和高频部分,采用小波区域窗口和子区域窗口统计把小波系数分类成边缘和非边缘系数,通过这些方法进行有效的边缘细节信息提取.在融合处理中,低频图像的小波系数平均值作为融合后的低频系数,高频细节系数根据不同区域特征选择方法以及对应输入图像小波系数的窗口区域方差来确定融合后高频小波系数.仿真实验结果表明,这样使得融合后的图像细节更真实更丰富,图像的偏振特性体现更为充分,同时减少对源图像的预处理要求,使图像在整体上有较好的视觉效果.从而证明这种方法能够在保留图像微小细节方面获得满意的结果,且算法有效性优于其他的图像融合方法.     

具有SIFT描述的Harris角点多源图像配准

多源传感器成像原理的差异给图像配准带来了很大困难,本文针对红外与可见光图像配准提出了一种具有SIFT描述特征的Harris角点多源图像配准算法。首先建立多尺度空间,以多尺度空间检测尺度不变的Harris角点作为特征点;然后通过改进SIFT对特征点的描述方法,采用圆环结构算子对Harris角点进行类SIFT的特征描述;最后利用双向最近邻方法进行匹配,通过最小二乘法实现图像的配准。实验证实了算法配准的精确性、快速性和稳定性,具有较好的配准效果。     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.     

Mechanism Study on the Wear of CrAlTiN Coated High-Speed Steel Twist Drills Under Dry Cutting Conditions

As demands about environment protection are growing up, dry cutting technology is getting more and more concerns from all over the world. Main works performed here are study on dry cutting performances and wear mechanisms of M2high-speed steel (HSS) twist drills with CrAlTiN multicomponent coatings, which was deposited using magnetron sputter ion plating system, in drilling 45 and 30CrMnSiA steel, and their comparisons to those in drilling the same steel but using monolayer CrN and commercial TiN coated drills. Drilling performances of drills are evaluated mainly through the measurements of width on outer corner flank land and the cutting forces. Results show that performances of CrAlTiN coated drills are better than those of monolayer CrN and TiN coated drills. In drilling 45 and 30CrMnSiA steel, the average tool life of the CrAlTiN coated drills are 17.2 and 11.8 times higher than those of the uncoated drills. Observing wear of the drill with scanning electronic microscope, results show that there is no crack or spallation of the CrAlTiN coatings in wear zones. Main mechanism of the wear here is adhesion.     

Study on Bond Ability of Arc-Spraying Coatings with Different Surface Pretreatment on Cast-Iron

Arc spraying coatings are widely used in various applications, but uncommon in cast iron substrate. Different surface pretreatment technology is tested on substrates of gray cast iron. Surface roughness and residual stress were measured by TR200 and X-ray diffraction analyzer. Influence of different surface pretreatment methods ( dry blasting and fusebond) on roughness and residual stress was analyzed. The arc-sprayed coatings of wire 3Cr13 (φ2mm) on gray cast iron substrate is studied. The microstructure and interface of bonding layer were observed by SEM. The bond strength was taken by tensile test. Results show that bond strength with grit blasting is higher than fuse-bond; it is feasible to make wire 3Cr13 coating with arc spraying on cast iron substrate roughened by grit blasting.     

Structural Characteristics of TiO2 Ceramic Coating by Micro-Plasma Oxidation

TiO2 ceramic coatings with thickness of 20 μm were formed on the surface of pure titanium by micro-plasma oxidation. Their micro-structures were investigated by by using X-ray diffraction and their surface images were detected by using scan electronic microscope. There were three kinds of TiO2 coatings, pure anatase type TiO2 phase, mixed phases consisted of rutile type TiO2 phase and anatase type TiO2 phase, pure rutile type TiO2 phase. The coating surface with the pure anatase type TiO2 phase is rough, while the coating surface with the pure rutile type TiO2phase is smooth. The upper coating surface with the mixed type TiO2 phases is anatase type TiO2 structure and the subsurface of the TiO2 coating is rutile type TiO2structure.     

Evaluation of fatigue life of steel using steel grain size

The insightful discussion of the relationship between the construction of metallographic and fatigue life and proposition of mathematical relationships describing this relationship was conducted in the paper. This paper presents a method for estimating the fatigue life, based on the construction of the microstructural material taking into account the grain size and the participation of ferrite and pearlite phase.