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    • 1. 发明授权
    • Quantitative characterization of fibrillatory spatiotemporal organization
    • 纤维性时空组织的定量表征
    • US5868680A
    • 1999-02-09
    • US936083
    • 1997-09-23
    • Paul R. SteinerMichael D. Lesh
    • Paul R. SteinerMichael D. Lesh
    • G06F17/00A61B5/046A61B5/0402
    • A61B5/0464
    • Described is a method for monitoring the spatiotemporal organization of atrial arrhythmias, especially atrial fibrillation, based on an analysis of sequences of activation patterns obtained from a particular set of atrial recording sites. This analysis measures the degree of order change in the sequence of activation patterns, or of the time between order changes. Electrogram signals produced by atrial fibrillation are acquired simultaneously from sites adjacent to atrial tissue using multipole electrode catheters. These signals subsequently are filtered and processed to obtain a group of time series which manifest peaks at the latencies of maximal energy in the original data; when these peaks occur are the latencies that are defined as activation events. The activation events from each sampled site are ordered with respect to activation events from each of the other sites, and are translated into corresponding activation patterns, which are determined by the specific spatiotemporal activation sequence associated with each activation event. Each activation pattern in the sequence then is compared with subsequent observed patterns to determine if any spatiotemporal order change has occurred, and if so, to what extent; also, the distribution of observed activation patterns is evaluated for an additional characterization of atrial fibrillation.
    • 描述了基于从一组特定的心房记录位点获得的激活模式序列的分析来监测房性心律失常的时空组织,特别是心房颤动的方法。 该分析测量激活模式序列或订单变化之间的时间顺序变化程度。 使用多极电极导管,同时从与心房组织相邻的部位获得由心房颤动产生的电图信号。 这些信号随后被过滤和处理以获得一组时间序列,其在原始数据中以最大能量的延迟表示峰值; 发生这些峰值时,定义为激活事件的延迟。 来自每个采样站点的激活事件相对于来自每个其他站点的激活事件被排序,并且被转换成相应的激活模式,其由与每个激活事件相关联的特定时空激活序列确定。 然后将序列中的每个激活模式与随后的观察模式进行比较,以确定是否发生了任何时空顺序变化,如果是,则在多大程度上; 还观察观察到的激活模式的分布,以评估心房颤动的额外特征。
    • 3. 发明授权
    • Phenol formaldehyde adhesive for bonding wood pieces of high moisture
content and composite board and veneers bonded with such adhesive
    • 苯酚甲醛粘合剂,用于粘合高含水量的木片和复合板以及用这种粘合剂粘结的单板
    • US4897314A
    • 1990-01-30
    • US309558
    • 1989-02-13
    • Michael R. ClarkePaul R. SteinerAxel W. Anderson
    • Michael R. ClarkePaul R. SteinerAxel W. Anderson
    • B27D1/04C09J161/04
    • C09J161/04B27D1/04Y10T428/3196
    • An improved phenol formaldehyde resin not requiring fillers or extenders and capable of bonding wafers or veneers having a moisture content of 10% or above is disclosed. The adhesive composition is prepared by mixing together a caustic solution of a high molecular weight PF resin, a dispersion of PF resin which is characterized in that it can swell in aqueous caustic medium but not go into solution, and alkylene carbonates or phenol resorcinol formaldehyde resins. Optionally, borax is utilized. The disperse phase is made by converting a solution of PF resin into a fine particle size particulate form by precipitation, spray drying or freeze drying, and partially cross-linking the resin during or subsequent to the formation of the fine particle size dispersion. The PF resin is partially cross-linked by (a) heat, by (b) acid catalysis, or by (c) a reaction with cross-linking chemicals. Also disclosed is a wood product produced from veneers having moisture contents of 10% or above and incised to improve their permeability to gases and liquids.
    • 公开了一种改进的不需要填料或增量剂并能够粘结水分含量为10%或以上的薄片或单板的酚醛树脂。 粘合剂组合物通过将高分子量PF树脂的苛性碱,PF树脂的分散体混合在一起来制备,其特征在于它可以在苛性碱水溶液中溶胀而不进入溶液,碳酸亚烷基酯或苯酚间苯二酚甲醛树脂 。 任选地,使用硼砂。 通过在形成细粒度分散体期间或之后通过沉淀,喷雾干燥或冷冻干燥将PF树脂的溶液转化成细粒度的颗粒形式,并部分地交联树脂来制备分散相。 PF树脂通过(a)加热,(b)酸催化或(c)与交联化学品的反应部分交联。 还公开了由具有10%或更高水分含量的薄板制成的木制品,并且切割以提高其对气体和液体的渗透性。
    • 4. 发明授权
    • Phenol formaldehyde adhesive for bonding wood pieces of high moisture
content and composite board and veneers bonded with such adhesive
    • 苯酚甲醛粘合剂,用于粘合高含水量的木片和复合板以及用这种粘合剂粘结的单板
    • US4824896A
    • 1989-04-25
    • US165929
    • 1988-03-09
    • Michael R. ClarkePaul R. SteinerAxel W. Anderson
    • Michael R. ClarkePaul R. SteinerAxel W. Anderson
    • B27D1/04C09J161/04C08L61/00C08K3/38
    • B27D1/04C09J161/04
    • Disclosed is an improved phenol formaldehyde (PF) resin that does not require fillers or extenders and is capable of bonding wafers or veneers having a moisture content of 10% or above. In the case of veneers exceptional results are obtained when the permeability of the veneer is increased by incising.The adhesive composition is prepared by mixing together a caustic solution of a high molecular weight PF resin, a dispersion of PF resin which is characterized in that it can swell in aqueous caustic medium but not go into solution, and a chemical which is capable of reacting with resins in both the continuous and the disperse phase, such as alkylene carbonates or phenol resorcinol formaldehyde (PRF) resins. Optionally, a component may be used such as borax which is capable of complexing with resins in the continuous and the disperse phase. The disperse phase is made by converting a solution of a PF resin into a fine particle size particulate form by precipitation, spray drying or freeze drying and partially cross-linking the resin during or subsequent to the formation of the fine particle size dispersion. The PF resin is partially cross-linked by (a) heat, by (b) acid catalysis, or by (c) a reaction with cross-linking chemicals such as cyclic carbonates or epoxy compounds or by a combination of (a) (b) and (c).The disperse phase may be made from a PF resin or from a resin in which some of the phenol has been replaced by other phenolic chemicals such as resorcinol, catechol, or kraft lignin. The chemical capable of reacting with resins in the continuous and the disperse phase may be a cyclic carbonate or a phenol resorcinol resin.Also disclosed is a wood product produced from veneers having moisture contents at 10% or above and incised to improve their permeability to gases and liquids.