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1. 发明授权

US5484861A Biodegradable copolyester and method for preparing the same 失效
标题翻译：可生物降解的共聚酯及其制备方法
公开(公告)号：US5484861A
公开(公告)日：1996-01-16
申请号：US375947
申请日：1995-01-20
申请人： Dae W. Ihm , Myung S. Lee , Hae S. Jun , Chang S. Lee , Jung: Sung G. , Seong I. Woo
发明人： Dae W. Ihm , Myung S. Lee , Hae S. Jun , Chang S. Lee , Jung: Sung G. , Seong I. Woo
IPC分类号： C08G63/60 , C08F20/00
CPC分类号： C08G63/60
摘要： There is disclosed a biodegradable copolyester having a combination structure consisting of one or more repeating unit of alkyleneterephthalate and one or more repeating unit of hydroxyalkanoate, represented by the following general formula I: ##STR1## wherein n is an integer not more than 10, R is --CH.sub.3 or --C.sub.2 H.sub.5,X is, ##STR2## and a, b and c are independently a natural number, along with a preparation method therefor.An aromatic polyester have repeating unit of alkyleneterephthalate is reacted with an aliphatic polyester having repeating unit of hydroxyalkanoate at 100.degree. C. or more in a proper solvent, such as nitrobenzene and dimethylsulfoxide, in the presence of a catalyst, such as dibutyltin oxide, tin[IV] chloride, tin[IV] octoate, hexabutyl distannoxane, tributyltin methoxide, or tributyltin chloride. It is superior in biodegradability and can be produced in low cost.
摘要翻译：公开了具有由一个或多个亚烷基对苯二酸酯的重复单元和一个或多个羟基链烷酸酯的重复单元组成的组合结构的可生物降解的共聚酯，由以下通式I表示：其中n是整数不大于10，R是-CH 3或-C 2 H 5，X是，且其制备方法。使芳族聚酯具有重复单元的对苯二甲酸亚烷基酯与具有羟基链烷酸酯重复单元的脂族聚酯在适当的溶剂如硝基苯和二甲基亚砜中在100℃或更高的温度下，在催化剂如二丁基氧化锡，锡 [IV]氯化物，[IV]辛酸锡，六丁基二锡氧烷，三丁基锡甲醇钠或三丁基氯化锡。它的生物降解性优越，可以低成本生产。

2. 发明授权

US5445778A Method for the production of aliphatic copolyester film 失效
标题翻译：生产脂肪族共聚酯薄膜的方法
公开(公告)号：US5445778A
公开(公告)日：1995-08-29
申请号：US321513
申请日：1994-10-12
申请人： Dae W. Ihm , Dae J. Kim , Young J. Kim , Myung S. Lee , Chang S. Lee
发明人： Dae W. Ihm , Dae J. Kim , Young J. Kim , Myung S. Lee , Chang S. Lee
IPC分类号： B29C47/14 , B29K67/00 , B29L7/00 , C08G63/06 , C08G63/16 , C08G63/20 , C08G63/78 , C08J5/18 , B29C47/00
CPC分类号： C08J5/18 , C08G63/16 , C08G63/20 , C08J2367/02
摘要： There is disclosed a method for the production of aliphatic copolyester film.The method comprises the steps of: applying esterification or ester-interchange to a reaction mixture of at least one acid component selected from the group consisting of succinic acid, succinic anhydride and succinic acid ester, 1,4-butanediol as a main diol component, 2,2-dimethyl-1,3-propanediol of 1 to 30% by mole based on the mole of the acid component, multifunctional compound 0.01 to 1% by mole, based on the mole of the acid component, multifunctional compound have more than three functional group of hydroxy group or carboxy group at below 220.degree. C., so as to give an oligomer mixture; polycondensing the oligomer into an aliphatic copolyester at a temperature of 240.degree. to 260.degree. C. under reduced pressures of not more than 1 mmHg in the presence of a catalyst; and melt-extruding the aliphatic copolyester using T die.Improved in draw ratio, the aliphatic copolyester film provided by the method can be applied to various applications, such as films, bottles, glass fiber-reinforced plastics, adhesives, paints.
摘要翻译：公开了脂肪族共聚酯膜的制造方法。该方法包括以下步骤：将酯化或酯交换应用于选自琥珀酸，琥珀酸酐和琥珀酸酯，1,4-丁二醇作为主要二醇组分的至少一种酸组分的反应混合物，相对于酸成分摩尔数为1〜30摩尔％的2,2-二甲基-1,3-丙二醇，0.01〜1摩尔％的多官能化合物，以酸成分摩尔计，多官能化合物多于三官能团的羟基或羧基在220℃以下，得到低聚物混合物; 在240℃至260℃的温度下，在催化剂存在下，在不超过1mmHg的减压下将低聚物缩聚成脂族共聚酯; 并使用T die熔融挤出脂肪族共聚酯。通过该方法提供的脂肪族共聚酯膜可以提高拉伸比，可以应用于膜，瓶，玻璃纤维增强塑料，粘合剂，油漆等各种应用。

3. 发明授权

US5606362A Variable bit rate audio information transmitting apparatus, and method therefor 失效
标题翻译：可变比特率音频信息发送装置及其方法
公开(公告)号：US5606362A
公开(公告)日：1997-02-25
申请号：US469223
申请日：1995-06-06
申请人： Myung S. Lee
发明人： Myung S. Lee
IPC分类号： H04B14/04 , H04N21/2368 , H04N21/434 , H04N7/14
CPC分类号： H04N21/2368 , H04B14/046 , H04N21/2335 , H04N21/2662 , H04N21/4341 , H04N21/4398 , H04N21/4621
摘要： A variable bit rate audio information transmitting apparatus, and a method therefor, are disclosed in which a bit rate is properly increased or decreased in accordance with the amount of audio information and by taking a fixed bit transmitting rate as a reference, so that the data rate can be adjusted in accordance with the importance of the audio information. The data bit amount of the currently inputted frames are computed to compare with a fixed bit allocation amount, and surplus bits and dummy data are properly allocated to the compared result, so that the bit amount allocated to the inputted data amount can be varied in transmitting the signals. The bit distribution is efficiently carried out through bit amount variation adjustment in accordance with the amount of sound source. Therefore the sound quality is improved, the deterioration of the sound quality is reduced, and the audio data is reduced. Further, the amount of the dummy data is reduced within the bit stream so that the bit utilization can be improved.
摘要翻译：公开了一种可变比特率音频信息发送装置及其方法，其中根据音频信息量适当地增加或减少比特率，并且以固定比特传输速率为参考，使得数据速率可以根据音频信息的重要性进行调整。计算当前输入的帧的数据比特量与固定比特分配量进行比较，并且对比较结果适当地分配剩余比特和伪数据，使得分配给输入数据量的比特量可以在发送中变化信号。通过根据声源的量的位量变化调整有效地进行位分配。因此，提高了音质，降低了音质的劣化，并且音频数据被减少。此外，在比特流内减少伪数据的量，从而可以提高比特利用率。

4. 发明授权

US5572454A Modulo reduction method using a precomputed table 失效
标题翻译：使用预计算表的模减法
公开(公告)号：US5572454A
公开(公告)日：1996-11-05
申请号：US353266
申请日：1994-12-05
申请人： Yun H. Lee , Chung R. Jang , Myung S. Lee
发明人： Yun H. Lee , Chung R. Jang , Myung S. Lee
IPC分类号： G06F7/52 , G06F7/50 , G06F7/535 , G06F7/72 , G09C1/00 , G06F7/00
CPC分类号： G06F7/72
摘要： A modulo reduction method using a precomputed table to increase a reduction speed during the execution of ordinary operational processes using computers and comprises a first step which searches out with an index of an upper log.sub.2 t (t.gtoreq.1) bit number and adds the value stored in a table to a lower n(n.gtoreq.512) bit number; a second step, which if the result, obtained from the addition of said lower n bit number to the number searched out from the table at said first step, produces an overflow (1 bit), eliminates said overflow and finishes the execution of an operation; and a third step, which if said overlow does not occur at said second step, adds .sub.N on a modulo N to the result obtained from said first step and finishes the execution of the operation.
摘要翻译：一种使用预计算表来增加在使用计算机的普通操作过程执行期间的减速速度的模降低方法，并且包括第一步骤，其利用上log2t（t> / = 1）位数的索引进行搜索，并将值存储在表中以较低的n（n> / = 512）位数; 第二步骤，如果从在所述第一步骤的表中搜索出的所述低n位数的加法获得的结果产生溢出（1比特），则消除所述溢出并完成操作的执行 ; 以及第三步骤，如果在所述第二步骤中不发生所述超出，则将模N的N加到从所述第一步骤获得的结果，并完成该操作的执行。

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