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    • 4. 发明申请
    • Encoded transmission
    • 编码传输
    • US20070260957A1
    • 2007-11-08
    • US11418158
    • 2006-05-03
    • Emina SoljaninNedeljko VarnicaPhilip Whiting
    • Emina SoljaninNedeljko VarnicaPhilip Whiting
    • H03M13/00
    • H04L1/1819H04L1/0002H04L1/0057H04L1/0069H04L1/1671
    • Significant improvement in Raptor codes and punctured LDPC codes are obtainable by use of the invention. In both a transmission scheme for Raptor-encoded or LDPC-encoded information, a dynamic adjustment approach is employed. A fraction of a codeword or information frame is transmitted. A feedback signal is sent from the receiver to the transmitter indicating either 1) successful decoding, or 2) failure to decode and/or a feedback signal indicative of a statistical measure of transmission channel quality. If decoding fails, a further portion of the codeword or frame is sent. The intensity and/or size of the fraction is adjusted based on the feedback signal. In one embodiment, a specific range for probabilities employed in the encoding process for Raptor codes provides the ability to increase transmission throughput. Further it has been found that the advantageous Raptor codes are useful in noise conditions where even the improved punctured LDPC codes of the invention begin to degrade.
    • 通过使用本发明可获得猛禽码和穿孔LDPC码的显着改进。 在用于Raptor编码或LDPC编码信息的传输方案中,采用动态调整方法。 发送码字或信息帧的一小部分。 反馈信号从接收机发送到发射机,指示1)成功解码,或2)解码失败和/或指示传输信道质量的统计测量的反馈信号。 如果解码失败,则发送码字或帧的另一部分。 基于反馈信号调整分数的强度和/或尺寸。 在一个实施例中,针对猛禽码的编码处理中采用的概率的特定范围提供了提高传输吞吐量的能力。 此外,已经发现,有利的Raptor码在其中甚至本发明的改进的穿孔LDPC码开始降级的噪声条件中是有用的。
    • 5. 发明授权
    • High consistency peroxide bleaching
    • 高度稠度的过氧化物漂白
    • US4938842A
    • 1990-07-03
    • US392626
    • 1989-02-23
    • Philip WhitingAdele M. RhodesArnold E. WilloughbyMartin G. FairbankHollis D. MacEwenFraser McLellan
    • Philip WhitingAdele M. RhodesArnold E. WilloughbyMartin G. FairbankHollis D. MacEwenFraser McLellan
    • D21C9/16
    • D21C9/163
    • A process is provided for the bleaching of wood pulp with hydrogen or sodium peroxide. The process includes the steps of adding to a wood pulp a bleach liquor having an effective amount of hydrogen or sodium peroxide bleaching agent and, by weight of the diluted wood pulp, 0.5 to 6% sodium hydroxide, 0 to 5% sodium silicate, 0 to 1%, preferably 0.02 to 0.05%, magnesium sulphate, and a chelating agent in an amount sufficient to sequester heavy metal ions in the pulp, to produce a pulp consistency of 1 to 16% at a temperature in the range of the bleach liquor freezing point to 25.degree. C., uniformly mixing the bleach liquor with the wood pulp, and immediately thickening the diluted wood pulp to a consistency in the range of 20 to 70% for bleaching of the thickened wood pulp. The wood pulp can be subjected to a preliminary treatment by the addition of a chelating agent in an amount sufficient to sequester chelatable heavy metals including manganese at a pulp consistency of 1 to 10%, and dewatering said pulp to a consistency of 20 to 70% to remove the sequestered manganese to less than 10 ppm.
    • 提供了用氢或过氧化钠漂白木浆的方法。 该方法包括以下步骤:向木浆中加入具有有效量的氢或过氧化钠漂白剂的漂白液,按稀释木浆重量计,0.5-6%氢氧化钠,0-5%硅酸钠,0 至1%,优选0.02至0.05%的硫酸镁和螯合剂,其量足以螯合纸浆中的重金属离子,以在漂白液的范围内的温度下产生1至16%的纸浆浓度 凝固至25℃,将漂白液与木浆均匀混合,并立即将稀释的木浆增稠至20至70%的稠度,以使漂白的木浆变得漂白。 木浆可以通过添加螯合剂进行初步处理,所述螯合剂的用量足以将纸浆稠度为1至10%的可螯合的重金属(包括锰)螯合,并将所述纸浆脱水至20至70% 将隔离锰除去至少于10ppm。