聚丙烯／三元乙丙橡胶／天然橡胶三元并用胶的流变性和机械性能

聚丙烯／三元乙丙橡胶／天然橡胶三元并用胶的机械性能和流变性与聚丙烯／三元乙丙烯橡胶，聚丙烯／天然橡胶二种二地并用胶的有关性能相当。研究结果表明ＰＰ／ＥＰＤＭ并用胶的５０％ＥＰＤＭ能用低成本的天然橡胶代替，并用胶的性能不会明显降低。     

橡胶加工专利

一、轮胎 低路面噪声充气轮胎 Jpn. Kokai Kokkyo Koho JP 2004 216 977（Cl. B60C1/00） 该专利介绍的无帘布层轮胎，其带束层含有复合模量为7．2-14．4MPa的钢丝帘线覆胶，以及间苯二酚（缩合物）和亚甲基给予体。轮胎钢丝帘线覆胶由含有100份RSS3、5份磺黄、3份Sumikanol 620和3份Sumikanol 507的胶料配方制成。轮胎另一种制造方法是其质量与前者相同，但其钢丝帘线覆胶不含Sumikanol 620和Sumikanol 507。相比之下，前者轮胎显示出来的噪声指数比后者轮胎降低了5％。     

The effect of stocking density during 4 hour transport to slaughter on behaviour, blood constituents and carcass bruising in Friesian steers

The aim of this work was to assess the response of Friesian steers to road transportation at low, medium and high (ca 200, 300 and 600 kg/m(2)) stocking densities in terms of physiology, behaviour and carcass bruising. Stocking density was determined by adjusting the number of animals per pen (3 runs) or by adjusting pen size (3 runs). Plasma cortisol and glucose increased (P < 0·001) with stocking density, as did plasma CK activity (P < 0·001) and carcass bruising (P < 0·01) both of which indicate muscle damage. At constant stocking density stress increased with pen location towards the tail of the truck, as reflected by a significant increase in plasma cortisol. Stocking density influenced standing orientation within the truck. At low stocking density animal movement was unrestricted and the preferred orientation was standing parallel to the direction of travel; there was a strong bias against diagonal orientations. Losses of balance were associated with specific driving events, notably braking and cornering. Minor losses of balance were observed at all stocking densities, but major losses of balance including animals going down underfoot were associated with high density. When an animal went down at high stocking density it did so involuntarily and was sometimes trapped down, destabilizing other members of the group in a domino effect. Exploratory, sexual and aggressive behaviours were inhibited at high stocking density, with the exception of mounting and pushing, which increased in frequency with stocking density. It was concluded that the high stocking density adversely affected animal welfare and lowered carcass quality when compared with the medium and low stocking densities.     

Recursive algorithms for implementing digital image filters

The B-spline functions are used to develop recursive algorithms for the efficient implementation of two-dimensional linear digital image filters. These filters may be spatially varying. The B-splines are used in a representation of the desired point spread function. We show that this leads to recursive algorithms and hardware implementations which are more efficient than either direct spatial domain filter realizations or FFT implementations. The Z-transform is used to develop a discrete version of Duhamel's theorem. A computer architecture for B-spline image filters is proposed and a complexity analysis and comparison to other approaches is provided.     

橡胶加工专利

一、轮胎 炭黑和烷基-苯氧基醇类含量高的轮胎胶料,燃油成本低且抗湿滑能力高的轮胎胶料配方,耐臭氧龟裂和抓着力强的备用轮胎和备用充气轮胎胎面胶,二、胶带、胶管与胶布 噪音小且耐屈挠疲劳强度大的传动带,V型多楔带胶料.[编者按]     

橡胶加工专利

一、轮胎 挤出性能优异的溴化异丁烯橡胶配方及其制得的耐天候轮胎Jpn．Kokai Tokkyo Koho JP 2003 261，713（C1．C08L9／00） 该专利介绍的胶料配方适用于轮胎胎侧胶，其中含有40％～90％的二烯类橡胶和10％～60％的溴化异丁烯-对-甲基苯乙烯共聚物以及0．5份～10份间同立构1，2-聚丁二烯晶体。胶料配方中含有10份天然橡胶（牌号RSS3）、58份间同立构聚丁二烯含量为12％的聚丁二烯橡胶（牌号VCR412）、40份溴化异丁烯-对-甲基苯乙烯共聚物（牌号Exxpro 90—10）和1．0份硫黄，模压后制成的胶片不会产生收缩。[编者按]     

橡胶加工专利

一、轮胎无内衬层的高耐久性充气轮胎Jpn.Kokai Tokkyo Koho JP2 0 0 2 1 0 3 ,90 7(Cl.B60 C1 / 0 0 )轮胎帘布层的内侧挂胶是用含有1 0 0份并用胶和45～60份炭黑的低透气性胶料制备的,其中,并用胶由二烯类橡胶与卤化丁基橡胶或者卤化异丁烯-对-甲基苯乙烯共聚物橡胶按配比为50～90 :1 0～50而构成;炭黑的碘吸附法比表面积为80 mg/ g～1 2 5mg/ g,氮吸附法比表面积为80 m2 / g～1 2 0 m2 / g,DBP吸附值为70 m L/ 1 0 0 g～1 0 0 m L/ 1 0 0 g,压缩试样DBP吸附值为70 m L / 1 0 0 g～90 m L / 1 0 0 g。将溴化丁基橡胶1 0份、天然橡…