摘要:
A one-piece molded plastic vehicular enclosure for children is disclosed. The vehicular enclosure, which can either be a car or truck configuration, has a length substantially greater than its width and height. The enclosure includes opposing top and bottom surfaces and opposing side surfaces inner connecting the top and bottom surfaces. The enclosure further includes opposing front and rear surfaces extending between the top and bottom surfaces and side surfaces. The rear surface includes a rear entry opening for ingress and egress of children into and out of the enclosure. The rear entry opening is defined by a cylindrical extension projecting from the rear surface. The rear entry opening has a height and width substantially equal to the distance between the top and bottom surfaces to facilitate ingress and egress into the enclosure by children. Preferably, the rear entry opening is sufficiently large to permit two children to pass one another during ingress and egress relative to the enclosure.
摘要:
A technique is disclosed for generating a plurality of output frames based on a single input frame. An input interface is configured to receive at least a portion of the input frame. An output controller is configured to receive, for each of the plurality of output frames, a new header, and combine each new header with at least a portion of the input frame. An output frame may be generated for which no corresponding input frame exists. An input interface is configured to receive an indication that the output frame should be generated. An output controller is configured to receive a generated header and combine the generated header with a dummy payload to form the output frame.
摘要:
A process for the preparation of a polyisobutene amine, in particularly a polyisobutene amine of formula (I): ##STR1## comprises reacting a carbonyl funtionalized polyisobutene [PIB]--(CO)R and an amine H.sub.2 NR.sup.1 and hydrogenating the product of the reaction between said carbonyll functionalized polyisobutene and said amine, where PIB is a polyisobutenyl group,R=H, methyl or vinyl,R.sup.1 =C.sub.1 -C.sub.20 alkyl group or --(CHR.sup.2).sub.n [X(CH.sub.2).sub.m ].sub.p X.sup.1 R.sup.3R.sup.2 =H or methyln=an integer of 1-4m=an integer of 2-4p=0, or an integer of 1-10R.sup.3 =H or C.sub.1 -C.sub.10 alkylXm X.sup.1 =O or NR.sup.4R.sup.4 =H, C.sub.1 -C.sub.10 alkyl group, or [(CH.sub.2).sub.q X.sup.2 R.sup.5 ]q=an integer of 2-4R.sup.5 is H, C.sub.1 -C.sub.10 alkyl groupX.sup.2 is 0 or NHeach of X and X.sup.1 may be the same or may be different and when p>1 each of the repeating units [X(CH.sub.2).sub.m ] may be the same or may be different.Polyamines or alcoholamines are preferred amines. The hydrogenation of the intermediate product is preferably effected by formic acid. The process of the invention is preferably carried out in one step.
摘要:
A fuel composition which comprises a major amount of a liquid hydrocarbon fuel and, in an amount to provide detergency, a polyisobutene (PIB) succinimide derived from the reaction of a polyisobutene--substituted succinic acylating agent and an amine having at least one reactive hydrogen bonded to an amine nitrogen is characterised in that the polyisobutene--substituted succinic acylating agent is obtained by a thermal route and the polyisobutene substituent is derived from a highly reactive polyisobutene ie having a high proportion of vinylidene groups --CH.sub.2 CMe.dbd.CH.sub.2. The PIB-substituted succinic acylating agent is preferably obtained by the thermal reaction of the highly reactive polyisobutene with a succinic acylating agent e.g. maleic anhydride.
摘要:
Optimizing statistics counter use is disclosed. A total number of counter bits to be used to track two or more statistics is determined. The total number of counter bits is allocated among the two or more statistics to provide for each statistic a counter comprising the number of bits allocated for that statistic, the allocation being such that each counter overflows at a rate desired for that counter. The overflow rates may be balanced, such that each counter overflows at approximately the same rate.
摘要:
Oxidised polyisobutenes, that is polyisobutenes containing ketonic and carboxylic acid carbonyl groups, are produced by passing through a column of the polyisobutene maintained at a temperature in the range from 140.degree. to 200.degree. C. and at atmospheric or elevated total pressure a molecular oxygen-containing gaseous oxidant at a gas flow rate greater than 10 liters cm.sup.-2 h.sup.-1 measured at the operating pressure. The oxidized polysisobutenes can be reacted for example with an aliphatic polyamine to produce a lubricating oil additive or with an aliphatic polyamine and formaldehyde to product a fuels additive.