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    • 141. 发明申请
    • Isotactic Polypropylene Nucleation
    • 全同立构聚丙烯成核
    • US20080249248A1
    • 2008-10-09
    • US12013183
    • 2008-01-11
    • Derek ThurmanSudhin DattaWen LiCharles L. Sims
    • Derek ThurmanSudhin DattaWen LiCharles L. Sims
    • C08L23/02
    • C08L23/10C08L23/12C08L23/142C08L2205/02C08L2666/06
    • Low molecular weight semicrystalline propylene-alpha olefin copolymers containing propylene crystallinity are used as a nucleating agent in crystalline polypropylene and polypropylene copolymers. The nucleating copolymers are propylene-alpha olefin copolymers having a percent crystallinity of 5-75%, a melting point of 45° C.-105° C., and an MFR between 300 and 5000 g/10 min. Nucleated polypropylene compositions comprise a nucleating amount of the copolymer blended in a matrix of polypropylene homopolymer, or 0.01 to 9 wt % α-olefin copolymer, having a melting point greater than 110° C. The nucleating copolymer improves processing time with little or no effect on the crystallinity-associated characteristics of the matrix. The invention also provides methods of crystallizing polypropylene with the nucleating agent and of forming articles with the composition, and also provides articles formed from the composition and/or by the method.
    • 含有丙烯结晶度的低分子量半结晶丙烯-α烯烃共聚物用作结晶聚丙烯和聚丙烯共聚物中的成核剂。 成核共聚物是结晶度为5-75%,熔点为45℃-105℃,MFR为300-5000g / 10min的丙烯-α-烯烃共聚物。 成核聚丙烯组合物包含在聚丙烯均聚物基质中共混的成核量的共聚物,或0.01至9重量%的熔点大于110℃的α-烯烃共聚物。成核共聚物改善处理时间,几乎没有或没有影响 关于基质的结晶性相关特征。 本发明还提供了使聚丙烯与成核剂结晶并形成具有该组合物的制品的方法,还提供了由该组合物和/或该方法形成的制品。
    • 143. 发明授权
    • Method of using sol-gel coatings for on-line preconcentration of amino acids in capillary electrophoresis
    • 在毛细管电泳中使用溶胶 - 凝胶涂层在线预浓缩氨基酸的方法
    • US07407568B1
    • 2008-08-05
    • US10704770
    • 2003-11-10
    • Abdul MalikWen LiDavid P. Fries
    • Abdul MalikWen LiDavid P. Fries
    • G01N27/447B05D7/22B01D15/08
    • B01J20/286B01J20/28047B01J20/285B01J20/3242B01J20/3268B01J2220/86C23C18/1216C23C18/1254
    • A novel on-line method is presented for the extraction and preconcentration of amino acids using a sol-gel coated column coupled to a conventional UV/vis detector. Extraction, stacking and focusing techniques are used in the preconcentration procedures. Sol-gel coatings are created by using N-Octadecyldimethyl[3(trimethoxysilyl)proply] ammonium chloride (C18-TMS) in the coating sol solutions. The resulting sol-gel coating carries a positive charge. For extraction, the pH of the samples is properly adjusted to impart a net negative charge to amino acids. A long plug of the sample is then passed through the sol-gel coated capillary to facilitate extraction via electrostatic interaction between the positively charged sol-gel coating and the negatively charged amino acid molecules. The focusing of the extracted amino acids is accomplished through desorption of the extracted amino acid molecules carried out by local pH change. The described procedure provides 150,000-fold enrichment effect for alanine.
    • 提出了一种新颖的在线方法,用于使用耦合到常规UV / vis检测器的溶胶 - 凝胶涂层柱提取和预浓缩氨基酸。 萃取,堆垛和聚焦技术用于预浓缩过程。 溶胶 - 凝胶涂层是通过在涂层溶胶溶液中使用N-十八烷基二甲基[3(三甲氧基甲硅烷基)原料]氯化铵(C 18-18 -TMS)产生的。 所得溶胶 - 凝胶涂层带正电荷。 为了提取,适当调节样品的pH以赋予氨基酸净负电荷。 然后将样品的长插塞通过溶胶 - 凝胶涂覆的毛细管,以促进通过带正电荷的溶胶 - 凝胶涂层和带负电荷的氨基酸分子之间的静电相互作用来提取。 提取的氨基酸的聚焦通过通过局部pH变化进行的提取的氨基酸分子的解吸完成。 所述方法为丙氨酸提供15万倍浓缩效果。
    • 144. 发明授权
    • Phase detector and method having hysteresis characteristics
    • 相位检测器和方法具有滞后特性
    • US07336106B2
    • 2008-02-26
    • US11505564
    • 2006-08-16
    • Gary JohnsonWen Li
    • Gary JohnsonWen Li
    • G01R25/00
    • H03D13/004
    • A phase detector generates a first output signal if a feedback clock signal leads a reference clock signal by more than a first time. The phase detector generates a second output signal if the feedback clock signal lags the reference clock signal by more than a second time. If the feedback clock signal either leads the reference clock signal by less than the first time or lags the reference clock signal by less than the second time, neither output signal is generated. The phase detector may be used in a delay-lock loop in which the first and second output signals increase or decrease a delay of the reference clock signal by respective first and second delay increments. In such case, the each of the first and second delay increments should be less than the sum of the first and second times.
    • 如果反馈时钟信号超过第一次引导参考时钟信号,则相位检测器产生第一输出信号。 如果反馈时钟信号比第二次滞后于参考时钟信号,则相位检测器产生第二输出信号。 如果反馈时钟信号通过小于第一次引导参考时钟信号或者将参考时钟信号滞后小于第二次,则不会产生输出信号。 相位检测器可以用在延迟锁定环路中,其中第一和第二输出信号通过相应的第一和第二延迟增量来增加或减小参考时钟信号的延迟。 在这种情况下,第一和第二延迟增量中的每个应该小于第一次和第二次的和。
    • 147. 发明申请
    • Adaptive optical transceiver for fiber access communications
    • 用于光纤接入通信的自适应光收发器
    • US20070280695A1
    • 2007-12-06
    • US11446276
    • 2006-06-02
    • Wen LiQing Zhu
    • Wen LiQing Zhu
    • H04B10/00
    • H04B10/506H04J14/02H04J14/0226H04J14/0227H04J14/0246H04J14/025H04J14/0282
    • An optical module includes a transmitter optical sub-assembly comprising a transmitter configured to emit a multi-longitudinal-mode (MLM) spectrum signal having an emission spectrum comprising a plurality of distinct narrow-spectrum peaks each corresponding to a longitudinal mode in the transmitter. The emission spectrum can be shifted in wavelength by a change in the transmitter temperature. The optical module also includes a heating and cooling device configured to control the temperature of the transmitter in response to a temperature-control signal and a receiver optical sub-assembly configured to output a pair of differential digital signals in response to an input optical signal.
    • 光学模块包括发射机光学子组件,发射机光学子组件包括被配置为发射具有发射光谱的多纵向模式(MLM)频谱信号的发射机,发射光谱包括多个不同的窄谱峰值,每个窄谱峰值对应于发射机中的纵向模式。 发射光谱可以通过发射器温度的变化在波长上移动。 光学模块还包括加热和冷却装置,其被配置为响应于温度控制信号控制发射器的温度,并且接收器光学子组件被配置为响应于输入光信号输出一对差分数字信号。
    • 149. 发明授权
    • Controller for delay locked loop circuits
    • 延迟锁定环路控制器
    • US07245540B2
    • 2007-07-17
    • US09874898
    • 2001-06-05
    • William JonesWen Li
    • William JonesWen Li
    • G11C7/00
    • G11C7/222G11C7/22
    • A method of controlling a delay locked loop (DLL) in a memory device is provided. The DLL generates an internal clock signal based on an external clock signal. The DLL constantly responds to variations in operating condition of the memory device to keep the external and internal clock synchronized. The method involves preventing the DLL from responding to a change in operating condition such as a change in the supply voltage of the memory device during an operational mode of the memory device such as an active mode, a read mode, or a refresh mode.
    • 提供了一种控制存储器件中的延迟锁定环(DLL)的方法。 DLL根据外部时钟信号产生内部时钟信号。 DLL不断响应存储器件的工作状态的变化,以保持外部和内部时钟同步。 该方法涉及防止DLL在诸如活动模式,读取模式或刷新模式的存储器件的操作模式期间响应于操作条件的变化,例如存储器件的电源电压的变化。