摘要:
The invention relates to a packet transmission network operating according to a packet switching method, comprising a plurality of network nodes coupled via at least two rings working in opposite directions which each have in status tables entries about the location of a defect and switched loops from one ring to another ring in a network node. After detecting a repaired defect, a network node changes an entry in its status table and transmits a repair message of this type about the location of the repaired defect to all the network nodes that can be reached.
摘要:
The invention relates to a method for controlling the transmission power employed by a transmitting unit for transmitting multicast signals via a radio interface to communication devices of a multicast group using a single physical channel. In order to enable an efficient power control, it is proposed that at least the communication device receiving the weakest multicast signals transmits power control commands to the transmitting unit. Further, it is proposed that the transmitting unit adjusts the transmission power based on power control commands received from at least one of the communication devices in a way that the power control commands of the communication device receiving the multicast signals with the lowest quality have the most significant influence on the adjustment. The invention relates equally to a corresponding transmitting unit, to a corresponding communication device and to a corresponding communication system.
摘要:
A local area network with a plurality of nodes for transmitting cells in the asynchronous transfer mode over a ring system having two opposite direction rings. In the event of a defect in a transmitting line from a node, or a defect in a neighboring node, a loop is formed in this node to reroute messages from one ring to the other. First, a node detecting a defect transmits a message of a first type to all other involved nodes, identifying the location of the detected defect. This information is entered in a respective status table in each node. After evaluating the information in its status table, a node which should form a loop does so, and sends a message of a second type identifying the loop to any nodes which do not already have this information.
摘要:
An unsaturated, elastomeric ABC block copolymer comprised of the monomer units of 40 to 80% of 1,3-butadiene, 5 to 40% of isoprene and 2 to 30% of styrene, said copolymer comprising i) 40 to 75% of block A which contains styrene and butadiene units or isoprene and butadiene units with a content of distributed vinyl or isopropenyl groups of less than 15%, iia) up to 25% of a block B which contains styrene and butadiene units or isoprene and butadiene units with a vinyl or isopropenyl content of more than 70%, or iib) up to 25% of a block B' which contains styrene, isoprene and optionally butadiene units with a content of homogeneously distributed isopropenyl or vinyl groups of less than 15%, and iii) 20 to 55% of a block C which contains styrene and isoprene units and optionally butadiene units with an isopropenyl or vinyl content of more than 70%.
摘要:
An unsaturated elastomeric, asymmetrically coupled block copolymer of the formula: (A).sub.n -X-(B).sub.m, wherein block A is a block of polybutadiene having a content of uniformly distributed vinyl groups ranging from 8 to 60% and block (B) is a homopolymer of isoprene or a copolymer of at least 10% isoprene with 0 to 60% butadiene and up to 45% styrene, the copolymer having a vinyl unit content of 75 to 90%, X is a radical of a coupling agent and (m-n).gtoreq.0 and (m+n) ranges from 3 to 25.
摘要:
An unsaturated elastomeric AB block copolymer comprising 20-75 wt. % 1,3-butadiene monomer units; 5-50 wt. % isoprene monomer units; and 3-30% wt. % styrene monomer units; wherein said block copolymer contains less than 3 wt. % styrene blocks, each of said block A and block B contain all three of said monomer units, said copolymer comprises 30-90 wt. % of block A and 70-10 wt. % of block B, and wherein the average vinyl and isopropenyl content of block B are each at least 30% higher than those of block A; and a method for preparing the unsaturated AB block copolymer.
摘要:
A block-free polymer is prepared by anionically polymerizing at least two compounds selected from the groups consisting of butadiene, isoprene and styrene in an inert organic solvent in the presence of an organolithium compound as a catalyst and a cocatalyst of a glycol dialkyl ether: ##STR1## wherein R.sub.3 is hydrogen, methyl or ethyl, R.sub.1 and R.sub.2 are alkyl groups of different numbers of carbon atoms selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, iso-butyl, sec-butyl and t-butyl, and the total number of carbon atoms in the alkyl group ranges from 5 to 7.
摘要:
A process for the preparation of an extensively amorphous homo- or copolymer of an .alpha.-olefin of 3-32 carbon atoms comprises polymerizing an .alpha.-olefin using a titanium-containing Ziegler-Natta catalyst, the catalyst comprising a mixture of(A) the reaction product of(a) a .mu.-oxoalkoxide of the formulaTi.sub.x O.sub.(x+y-1) M.sub.y.sup.m (OR.sup.1).sub.(2x+1) Z.sub.(m-1)y whereinM is a metal of valence m,R.sup.1 is an alkyl residue of 1-10 carbon atoms,Z is C.sub.1-18 alkanoyloxy or C.sub.1-10 alkoxy,x is a whole or fractional number of 1-4,y is a whole or fractional number of 1-2 andm is 2,3 or 4; with(b) a halogen-containing organoaluminum compound of the formulaR.sub.n.sup.2 AlX.sub.3-n whereinR.sup.2 is C.sub.1-16 alkyl,X is chlorine, bromine or iodine, andn is a whole or fractional number of 0.5-2.5, and(B) an aluminum trialkyl of up to 16 carbon atoms in each alkyl group.
摘要:
The present disclosure describes methods, systems, and computer program products for providing access to business network data. One method includes identifying a logical graph from business network linked graph data to be transformed into a resource graph, the logical graph including at least two nodes and at least one edge connecting a pair of nodes and defining a connection between the nodes. Each node is converted into a resource. A resource graph associated with the logical graph can be generated, where generation comprises, for each identified node, associating at least one attribute associated with the identified node as a resource attribute of the corresponding resource, adding at least one node connected to the identified node via an edge in the logical graph as a resource attribute of the corresponding resource, and dissolving at least one connection between the identified node and at least one other entity in the logical graph.
摘要:
The invention relates to a radiation detector (10), comprising an array of pixels (1), wherein each pixel (1) comprises a conversion layer of a semiconductor material (4) for converting incident radiation into electrical signals and wherein each pixel (1) is surrounded by a trench (3) that is at least partly filled with a barrier material that absorbs at least a part of photons generated by the incident radiation. The invention also relates to a method of manufacturing such a radiation detector (10).