Methods and apparatus for hiding data in halftone images
    4.
    发明申请
    Methods and apparatus for hiding data in halftone images 失效
    在半色调图像中隐藏数据的方法和装置

    公开(公告)号:US20060034483A1

    公开(公告)日:2006-02-16

    申请号:US11233732

    申请日:2005-09-22

    申请人: Oscar Au Ming Fu

    发明人: Oscar Au Ming Fu

    IPC分类号: G06K9/00

    摘要: We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.

    摘要翻译: 我们提出了生成半色调图像的方法,其中每个像素采用两个色调值之一。 生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。 在第一种情况下,通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素,将数据隐藏在现有的半色调图像内。 在第二种情况下,从灰度图像生成半色调图像,并且在该转换处理期间数据被隐藏。

    CARBURIZATION PROCESS FOR STABILIZING NICKEL-BASED SUPERALLOYS
    6.
    发明申请
    CARBURIZATION PROCESS FOR STABILIZING NICKEL-BASED SUPERALLOYS 有权
    用于稳定镍基超级合金的加碳工艺

    公开(公告)号:US20100276036A1

    公开(公告)日:2010-11-04

    申请号:US11616392

    申请日:2006-12-27

    IPC分类号: C23C8/34 C23C8/02 C23C8/80

    摘要: A process by which a nickel-based superalloy substrate prone to deleterious reactions with an aluminum-rich coating can be stabilized by carburization. The process generally entails processing the surface of the substrate to be substantially free of oxides, heating the substrate in a non-oxidizing atmosphere to a carburization temperature, and then contacting the surface of the substrate with a carburization gas mixture comprising a diluted low activity hydrocarbon gas while maintaining the substrate at the carburization temperature. While at the carburization temperature and contacted by the carburization gas, carbon atoms in the carburization gas dissociate therefrom, transfer onto the surface of the substrate, diffuse into the substrate, and react with refractory metals within the substrate to form refractory metal carbides within a carburized region beneath the surface of the substrate. The substrate is then cooled in a non-oxidizing atmosphere to terminate carbide formation.

    摘要翻译: 通过渗碳可以稳定易于与富铝涂层有害反应的镍基超级合金基材。 该方法通常需要处理基材的表面基本上不含氧化物,在非氧化性气氛中将基底加热到渗碳温度,然后使基材表面与含有稀释的低活性烃的渗碳气体混合物接触 同时将基材保持在渗碳温度。 在渗碳温度下和渗碳气体接触时,渗碳气体中的碳原子与其分离,转移到基体的表面,扩散到基体内,并与基底内的难熔金属反应,形成渗碳的难熔金属碳化物 在基底表面下方的区域。 然后将衬底在非氧化气氛中冷却以终止碳化物形成。

    Layered thermal barrier coatings containing lanthanide series oxides for improved resistance to CMAS degradation
    10.
    发明申请
    Layered thermal barrier coatings containing lanthanide series oxides for improved resistance to CMAS degradation 审中-公开
    包含镧系元素氧化物的分层热障涂层,以改善对CMAS降解的抵抗力

    公开(公告)号:US20070160859A1

    公开(公告)日:2007-07-12

    申请号:US11327091

    申请日:2006-01-06

    IPC分类号: B32B15/04

    摘要: A coating applied as a two layer system. The outer layer is an oxide of a group IV metal selected from the group consisting of zirconium oxide, hafnium oxide and combinations thereof, which are doped with an effective amount of a lanthanum series oxide. These metal oxides doped with a lanthanum series addition comprises a high weight percentage of the outer coating. As used herein, lanthanum series means an element selected from the group consisting of lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) and combinations thereof, and lanthanum series oxides are oxides of these elements. When the zirconium oxide is doped with an effective amount of a lanthanum series oxide, a dense reaction layer is formed at the interface of the outer layer of TBC and the CMAS. This dense reaction layer prevents CMAS infiltration below it. The second layer, or inner layer underlying the outer layer, comprises a layer of partially stabilized zirconium oxide.

    摘要翻译: 涂层作为两层体系。 外层是掺杂有有效量的镧系氧化物的选自氧化锆,氧化铪及其组合的IV族金属的氧化物。 掺杂有镧系列添加剂的这些金属氧化物包括外涂层的高重量百分比。 如本文所用,镧系指选自镧(La),铈(Ce),镨(Pr),钕(Nd),ium(Pm),钐(Sm),铕(Eu), 钆(Gd),铽(Tb),镝(Dy),钬(Ho),铒(Er),ium(Tm),镱(Yb),镥(Lu)及其组合,以及镧系氧化物是 这些元素。 当氧化锆掺杂有效量的镧系氧化物时,在TBC的外层和CMAS的界面处形成致密的反应层。 这种致密的反应层可防止CMAS渗透在其下方。 外层的第二层或内层包含部分稳定的氧化锆层。