公开(公告)号：US20140213731A1

公开(公告)日：2014-07-31

申请号：US14131617

申请日：2012-04-13

申请人： Wenyan Wang ,  Mingqiang Zhang ,  Jian Wang ,  Dengfei Wang ,  Enguang Zou ,  Liping Qiu ,  Qun Dong ,  Jinxian Jiang ,  Jianying Ma ,  Tengjie Ge ,  Yanjie An ,  Deying Zhang ,  Bo Li ,  Gujyue Guo ,  Shihua Wang ,  He Ren ,  Lirong Jing ,  Haifeng Guo

发明人： Wenyan Wang ,  Mingqiang Zhang ,  Jian Wang ,  Dengfei Wang ,  Enguang Zou ,  Liping Qiu ,  Qun Dong ,  Jinxian Jiang ,  Jianying Ma ,  Tengjie Ge ,  Yanjie An ,  Deying Zhang ,  Bo Li ,  Gujyue Guo ,  Shihua Wang ,  He Ren ,  Lirong Jing ,  Haifeng Guo

IPC分类号： C08F255/02

CPC分类号： C08F255/02 ,  Y02P20/544 ,  C08F220/06 ,  C08F212/08 ,  C08F220/18 ,  C08F222/06 ,  C08F2220/1825

摘要： A supercritical carbon dioxide-assisted solid-phase grafting modification method for polypropylene, comprises swelling polypropylene for 0.5 to 10 hours in supercritical carbon dioxide having dissolved vinyl monomer and an initiator, then slowly relieving the pressure; moving the polypropylene that has undergone the swelling process into a reaction kettle, and adding xylene as an interface agent, the mass of xylene being 1% of the polypropylene; increasing the temperature to between 65° C. and 165° C. under normal pressure, and reacting 1 to 10 hours to obtain modified polypropylene; the swelling permeation temperature during the swelling process is from 31° C. to 60° C., the swelling pressure is from 7.5 to 12 MPa; the initiator is an azo compound or a peroxide. In the present method, the grafting rate reaches 5.4%, the thermal property, polarity, and mechanical property all improve substantially, and hydrophilic property is substantially enhanced.

摘要翻译： 用于聚丙烯的超临界二氧化碳辅助固相接枝改性方法包括在具有溶解的乙烯基单体和引发剂的超临界二氧化碳中将聚丙烯溶胀0.5至10小时，然后缓慢释放压力; 将经过溶胀处理的聚丙烯移入反应釜中，加入二甲苯作为界面剂，二甲苯的质量为聚丙烯的1％; 在常压下将温度升至65℃至165℃，反应1至10小时以获得改性聚丙烯; 膨胀过程中的溶胀渗透温度为31℃至60℃，溶胀压力为7.5至12MPa; 引发剂是偶氮化合物或过氧化物。 在本方法中，接枝率达到5.4％，热性能，极性和机械性能均有显着提高，亲水性能明显提高。

公开(公告)号：US06510407B1

公开(公告)日：2003-01-21

申请号：US09421435

申请日：1999-10-19

申请人： Shihua Wang

发明人： Shihua Wang

IPC分类号： G10L1908

CPC分类号： G10L19/18

摘要： A speech encoding method using analysis-by-synthesis includes sampling an input speech and dividing the resulting speech samples into frames and subframes. The frames are analyzed to determine coefficients for the synthesis filter. The subframes are categorized into unvoiced, voiced and onset categories. Based on the category, a different coding scheme is used. The coded speech is fed into the synthesis filter, the output of which is compared to the input speech samples to produce an error signal. The coding is then adjusted per the error signal.

摘要翻译： 使用分析综合的语音编码方法包括对输入语音进行采样，并将得到的语音样本划分为帧和子帧。 分析帧以确定合成滤波器的系数。 子帧分为无声，有声和起始类别。 基于该类别，使用不同的编码方案。 编码语音被馈送到合成滤波器，其输出与输入语音样本进行比较以产生误差信号。 然后根据误差信号调整编码。