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    • 2. 发明申请
    • NANOSTRUCTURED POLYMER MEMBRANES FOR SELECTIVE ALCOHOL TRANSPORT
    • 用于选择性酒精运输的纳米结构聚合物膜
    • WO2011112796A2
    • 2011-09-15
    • PCT/US2011/027871
    • 2011-03-10
    • THE REGENTS OF THE UNIVERSITY OF CALIFORNIABALSARA, Nitash, P.JHA, Ashish, K.CHEN, Liang
    • BALSARA, Nitash, P.JHA, Ashish, K.CHEN, Liang
    • C08G61/12
    • C08L65/00B01D61/362B01D71/40B01D71/44B01D71/52B01D71/70B01D71/72B01D71/80C08F293/005C08G61/08C08G61/12C08G77/20C08G77/442C08L53/02
    • The present invention relates to copolymer compositions for alcohol-selective membranes and methods of selectively separating an alcohol such as ethanol from an aqueous solution using such membranes. The copolymer compositions may be block copolymers of polystyrene-polybutadiene-polystyrene (hereafter "SBS") having cylindrical morphologies; graft diblock copolymers synthesized by ring-opening metathesis polymerization of two cycloalkene monomers, wherein at least one of the cycloalkene monomers is substituted with one or more polydialkylsiloxane groups; or triblock copolymers comprising a middle block comprising a polymerized cycloalkene monomer and two end groups. The synthesized graft and triblock copolymer compositions may have a spherical, lamellar, cylindrical, double diamond, or gyroid morphologies. The copolymer compositions may contain a structural block that imparts essential mechanical properties to the membrane (e.g., polystyrene) and may also contain an alcohol transporting block (e.g., polydimethylsiloxane or polybutadiene). The copolymer compositions may have a domain spacing and a flux, where the flux increases as the domain spacing increases. The copolymer compositions may also have an alcohol separation factor that increases as the domain spacing increases. The separation method may be carried out using pervaporation or vapor permeation techniques.
    • 本发明涉及醇选择性膜的共聚物组合物和使用这种膜从水溶液中选择性地分离醇如乙醇的方法。 共聚物组合物可以是具有圆柱形状的聚苯乙烯 - 聚丁二烯 - 聚苯乙烯(以下称为“SBS”)的嵌段共聚物; 通过两个环烯烃单体的开环易位聚合合成的接枝二嵌段共聚物,其中至少一种环烯烃单体被一个或多个聚二烷基硅氧烷基团取代; 或包含包含聚合的环烯烃单体和两个端基的中间嵌段的三嵌段共聚物。 合成的接枝和三嵌段共聚物组合物可以具有球形,层状,圆柱形,双金刚石或旋转形态。 共聚物组合物可以含有向膜(例如聚苯乙烯)赋予必要的机械性能并且也可以含有醇输送嵌段(例如聚二甲基硅氧烷或聚丁二烯)的结构嵌段。 共聚物组合物可以具有畴间隔和通量,其中通量随着畴间距的增加而增加。 共聚物组合物还可以具有随着畴间距增加而增加的醇分离因子。 分离方法可以使用全蒸发或蒸气渗透技术进行。
    • 4. 发明申请
    • MANAGING DATA WITH FLEXIBLE SCHEMA
    • 以灵活的图表管理数据
    • WO2016000156A1
    • 2016-01-07
    • PCT/CN2014/081226
    • 2014-06-30
    • MICROSOFT TECHNOLOGY LICENSING, LLCCHEN, Liang
    • CHEN, LiangBERNSTEIN, Philip A.
    • G06F17/30
    • G06F17/30345G06F17/30292G06F17/30297G06F17/30306
    • The subject matter described herein relates to managing data with flexible schema. A method, computer storage medium, and system are provided for managing data with flexible schema. The method comprises providing a logical view for logical tables of a database; and managing mappings between the logical tables and a physical table according to predefined mapping constraints, each of the logical table mapped as a part of the physical table. The mapping constraints at least specify that (i) a logical column in the logical tables is mapped to at least one physical column in the physical table, and (ii) distinct logical columns in one of the logical tables are mapped to distinct physical columns in the physical table. As a result, schema evolution may be done with minimized data migration.
    • 本文所述的主题涉及使用灵活的模式来管理数据。 提供了一种方法,计算机存储介质和系统,用于以灵活的模式管理数据。 该方法包括提供数据库的逻辑表的逻辑视图; 并根据预定义的映射约束管理逻辑表和物理表之间的映射,每个逻辑表映射为物理表的一部分。 映射约束至少指定(i)逻辑表中的逻辑列被映射到物理表中的至少一个物理列,并且(ii)其中一个逻辑表中的不同逻辑列映射到不同的物理列 物理表。 因此,可以通过最小化数据迁移来完成模式演进。