33 results about "Structural regularity" patented technology

The invention provides a block poly-carboxylic acid concrete high-efficiency water reducing agent with an ordered structure and a preparation method thereof. The block poly-carboxylic acid is prepared by using atom transfer radical polymerization, the structural regularity and the molecular weight distribution of the poly-carboxylic acid are controlled effectively, and the water reducing agent is used in a cement dispersing process. By adoption of the block poly-carboxylic acid concrete high-efficiency water reducing agent and the preparation method thereof, the problems of uncontrollable molecular weight of the poly-carboxylic acid, wider molecular weight distribution, un-designable molecular structure and the like are solved.

A technique for improving access times when accessing memory, such as when accessing data from cache. By a unique manipulation and usage of a specified memory address in combination with the cache's internal organization, the address range required by the requested data can be covered by one odd and one even segment of the cache, where the odd segment is always at the base address created by the summation of the source operands and set to the odd segment, and the even address is created by summation of the source operands plus an offset value equivalent to the size of the cache line. This structural regularity is used to efficiently generate both the even and odd addresses in parallel to retrieve the desired data.

The invention belongs to the technical field of polyether polyol synthesis and specifically relates to a preparation method of low-molecular-weight polyether polyol for polyetheramine. According to the preparation method, 2-methyl-1,3-propylene glycol, which is used as a starting agent, reacts with epoxide in the presence of an alkali metal catalyst at low temperature; and then, the reaction product is end-capped with epoxypropane at high temperature so as to obtain low-molecular-weight polyether polyol for polyetheramine. During the polymerization, 2-methyl-1,3-propylene glycol is used as the starting agent. Due to structural regularity and symmetry of 2-methyl-1,3-propylene glycol, activities at two ends are identical. During polymerization between 2-methyl-1,3-propylene glycol and the epoxide, polyether structure is more regular. During amino-capping, activities at two ends are consistent. The product has characteristics of amorphism, strong weatherability, tension resistance, strong bending resistance and the like. By the structure, polyetheramine can be endowed with characteristics of low melting point, low viscosity and good intersolubility with auxiliaries.

The invention discloses a carry-saving multiplier, relating to the technical field of integrated circuit. Through analysis on the conventional carry-saving multiplier, full adders at two special positions in an array can be logically simplified, so that the speed and the power consumption are optimized on the premise of reducing the area of the multiplier; and furthermore, in an AND gate array for generating a partial product, each row of AND gates has a common signal, so that the number of transistors is reduced by sharing a downwardly drawn NMOS (N-channel Mental-oxide-semiconductor) tube; therefore, in combination of the two ways, a novel simplified carry-saving multiplier is constructed. A simulating result shows that compared with the conventional carry-saving multiplier, the carry-saving multiplier disclosed by the invention can reduce a power consumption delay product as high as 12.41 percent; the improved carry-saving multiplier still has the advantage of structural regularity of all array multiplier, so that the improved carry-saving multiplier is still applicable to design of a large-scale integrated circuit; and meanwhile, due to advantages in the speed and the power consumption of the improved carry-saving multiplier, performance of a circuit system can be further improved.