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149results about How to "Little variability" patented technology

Clustering for data compression

InactiveUS6591405B1Avoids excessive disk thrashingAvoids the excessive disk thrashingProgramme controlData processing applicationsData compressionHard disc drive
An improved profileometry data collection and analysis system employing software that performs clustering analysis on library data stored in memory that represent semiconductor chip wafer profiles, for use in matching real-time data signals from data collected by profileometry instruments. To better perform a match in real-time between the incoming real-time data signals and the profile library data, cluster analysis is performed on the library data to partition the library data into clusters, and to extract representative cluster data points of the clusters. The representatives of the clusters are stored in primary memory (e.g., RAM), while the data forming the clusters are stored in secondary memory (e.g., a hard drive). A real-time data signal is then first compared to the representative cluster data points, and when a match is made with a particular representative cluster data point, the cluster associated with the representative cluster data point is loaded from secondary memory into primary memory. Next a further search is made with the incoming real-time data signal to find the closest match to the data in the cluster. In this way the entire library data does not have to be searched sequentially, and the entire library does not have to reside in primary memory in order to be quickly searched, which both conserves time and primary memory.
Owner:TOKYO ELECTRON US HOLDINGS INC

Method for processing and analyzing multi-sequence dynamic creep test data of asphalt mixture

The invention discloses a method for processing and analyzing multi-sequence dynamic creep test data of an asphalt mixture. Creep data measured by test undergoes low-pass filtering by designing a Butterworth low-pass filter to obtain a smooth creep curve, the average permanent strain rate of every loading sequence is calculated, and the following three indicators for evaluating the creep characteristics of the asphalt mixture are calculated according to a formula: the strain rate sensitivity index SRSI, the composite average permanent strain rate CAPSR and the composite creep stiffness modulusCCSM, wherein the influence of the stress condition on the creep of the above material is positively correlated with the value of the SRSI; the CAPSR represents the equivalent strain rate under various complex stress conditions, the permanent strain generated in one-time loading of the material is positively correlated with the value of the CAPSR, and the high temperature performances of the material are negatively correlated with the value of the CAPSR; and the CCSM represents the resistance of the material to permanent deformation at the end of the creep test, and the high temperature performances of the material are positively correlated with the value of the CCSM.
Owner:SOUTHEAST UNIV

Production method and manufacturing process for environmentally-friendly decorative board

The invention relates to a method and a manufacturing process (attached drawing) for producing an environmentally-friendly decorative board by using a fast-growing poplar rotary cut veneer, which mainly solve the problems of low bonding strength, high probability of cracking and warping, uncompacted corner, high formaldehyde release, low nail holding power, high probability of falling, poor water proofing, moisture proofing and fire proofing performance existing in the conventional decorative board. The production method and the manufacturing process are mainly characterized in that: the density of a finished board is determined by using the apparent density (actually measured) of the fast-growing poplar rotary cut veneer in comparison with the density of red pine; a compression ratio is determined according to the two densities; and the thickness of an assembly is determined by using the compression ratio. Modified urea-formaldehyde resin and melamine resin are mixed as an adhesive; and parameters for a hot pressing process of a board blank are determined according to the compression ratio, and curing temperature, time and pressure of an adhesive. Decorative paper which is soaked in the adhesive solution is adhered to the surface and the back surface of the board blank formed after hot pressing, and then secondary hot pressing is performed to finish the final environmentally-friendly decorative board. The production method and the manufacturing process have the advantages of mechanical property of the finished product beyond that of timber, no formaldehyde release, water proofing, moisture proofing, fire proofing and cracking prevention effects, high nail holding power, repeatedly detachable hardware and small variability.
Owner:LIAONING JIUJIU WOOD

Glue laminated wood member with controllable dimensional stability and preparation method thereof

InactiveCN102990730AReduce crackingReduce laminate delaminationLaminationLamination apparatusSolid woodAdhesive cement
The invention discloses a glue laminated wood member with controllable dimensional stability and a preparation method thereof, belonging to the field of glue laminated wood preparation. The glue laminated wood member with controllable dimensional stability is composed of laminated sheets and adhesive layers through pressed superimposition, wherein each laminated sheet is an indentation laminated sheet which is processed by using solid-wood dimension stocks through transverse widening and longitudinal lengthening, the indentation laminated sheet is provided with continuous or discontinuous indentations along the texture direction, the adhesive layers adhered to the surfaces of the indentation laminated sheets are arranged between adjacent indentation laminated sheets, and adhesives are filled in the indentations. The glue laminated wood member with controllable dimensional stability is prepared through the steps of processing indentations, controlling the moisture content and the like, and the prepared glue laminated wood member with controllable dimensional stability solves the problems that the durability of common glue laminated wood members is poor caused by that middle-layer plates of the common glue laminated wood members are delaminated or subjected to shear failure or the stress between laminated sheets is concentrated due to environment temperature changes, or the quality of members prepared by using fast-growing wood is uncontrollable, the strength of the members is degraded caused by traditional wood removal through slotting, and the like.
Owner:NANJING UNIV OF TECH

Test method for measuring maximum dry density of soil and stone mixture of road subgrade

The invention discloses a test method for measuring maximum dry density of soil and stone mixture of a road subgrade. The test method comprises the following steps of loading samples into a test die by two times, fixing onto a vibration compaction test instrument, and performing vibration compaction for two times, wherein the vibration compaction time is 50s each time, the parameter setting of the compaction test instrument is as follows: the vibration frequency is 25Hz, the excitation vibration force is 5.5kN, the nominal vibration amplitude is 1.4mm, the loading mass is 110+/-2kg, the unloading mass is 170+/-2kg, the eccentric block included angle is 0 degree, and the pressure of the static surface is 109kPa; testing the water content of each sample, and calculating the dry density of each sample; repeating the compaction test for five times, and drawing the dry density-water content relationship curve, wherein the transverse coordinate is the water content, and the longitudinal coordinate is the dry density; the dry density corresponding to the curve peak is the maximum dry density roudmax, and the corresponding water content is optimum water content omega0. The test method has the advantages that the operation is simple and convenient, the results are reliable, the variance is small, and the destroy to the raw materials is small.
Owner:CHANGAN UNIV +1
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