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666 results about "Local structure" patented technology

Method for analyzing fluid dynamics and structural mechanics of wind generator blades

The invention discloses a method for analyzing fluid dynamics and structural mechanics of wind generator blades, which comprises the following steps: combining CFD and CAE methods, determining each parameter of an impeller model by adopting the momentum blade element theory, designing an entity model of the blade, establishing a three-dimensional model of a windmill blade, a hub and a peripheral wind site based on a Gambit software platform, meshing the model by adopting a partial structuring method, setting a proper boundary condition, calculating the performance of a finite element based on a Fluent software platform, extracting the blade torsion and calculating the blade power and the blade efficiency, establishing a blade structural model based on an ansys software platform and meshing the blade structural model, applying load and restraint condition to the blade structural model, analyzing the mode of the blade structure, performing equal torque treatment for pressure distribution acquired by the Fluent software platform, applying pressure surface load to the ansys software platform, calculating the structural mechanics characteristics of the wind generator blades, and extracting blade deformation and stress distribution characteristics.
Owner:SOUTHEAST UNIV +1

Image classification method based on hierarchical SIFT (scale-invariant feature transform) features and sparse coding

InactiveCN103020647AReduce the dimensionality of SIFT featuresHigh simulationCharacter and pattern recognitionSingular value decompositionData set
The invention discloses an image classification method based on hierarchical SIFT (scale-invariant feature transform) features and sparse coding. The method includes the implementation steps: (1) extracting 512-dimension scale unchanged SIFT features from each image in a data set according to 8-pixel step length and 32X32 pixel blocks; (2) applying a space maximization pool method to the SIFT features of each image block so that a 168-dimension vector y is obtained; (3) selecting several blocks from all 32X32 image blocks in the data set randomly and training a dictionary D by the aid of a K-singular value decomposition method; (4) as for the vectors y of all blocks in each image, performing sparse representation for the dictionary D; (5) applying the method in the step (2) for all sparse representations of each image so that feature representations of the whole image are obtained; and (6) inputting the feature representations of the images into a linear SVM (support vector machine) classifier so that classification results of the images are obtained. The image classification method has the advantages of capabilities of capturing local image structured information and removing image low-level feature redundancy and can be used for target identification.
Owner:XIDIAN UNIV

Methods of forming a nonvolatile memory device having a local SONOS structure that use spacers to adjust the overlap between a gate electrode and a charge trapping layer

A nonvolatile memory device is formed by forming a first oxide layer on a substrate. A nitride layer is formed on the first oxide layer. A second oxide layer is formed on the nitride layer. The second oxide layer is patterned so as to expose the nitride layer. A first polysilicon layer is formed on the second oxide layer and the exposed portion of the nitride layer. The first polysilicon layer and the nitride layer are etched so as to expose the second oxide layer and the first oxide layer and to form polysilicon spacers on the nitride layer. The polysilicon spacers are etched so as to expose portions of the nitride layer. The exposed portions of the nitride layer may function as charge trapping layers. The exposed portion of the first oxide layer is etched to expose a portion of the substrate. A third oxide layer is formed on the exposed portion of the substrate, the exposed portions of the nitride layer, and the second oxide layer. A second polysilicon layer is formed on the third oxide layer. The second polysilicon layer is planarized so as to expose the second oxide layer. The second polysilicon layer may function as a gate electrode that overlaps portions of the charge trapping layers. The third oxide layer may function as a gate-insulating layer.
Owner:SAMSUNG ELECTRONICS CO LTD

Method for manufacturing casting blank of die for inner containers of household appliances on basis of metal cavity with cold iron structure

The invention discloses a method for manufacturing a casting blank of a die for inner containers of household appliances on the basis of a metal cavity with a cold iron structure, and relates to the technical field of aluminum alloy casting. The method includes particular steps of constructing an outer cavity by cold iron blocks on the periphery of a manufactured wood mold in a form following manner; filling gaps among the cold iron blocks by clay sand, tightly filling the corresponding cold iron blocks by clay sand after each local structure is completed, and compacting a sand mould to prevent the cold iron blocks from moving; constructing a sand core of an inner cavity by the same method after the outer cavity is constructed; opening a case to take out the wood mould after the sand core of the inner cavity is manufactured so that a cavity of a casting is formed; drying the cavity of the casting and the sand core consisting of clay sand; preheating the cavity of the casting at the preheating temperature of 200 DEG C before pouring of the cavity of the casting; casting melted aluminum alloy into the cavity of the casting; and opening the case to take out the casting after the cavity of the casting is cooled naturally. The method is mainly used for casting the die for the inner containers of the household appliances, the surface of a casting product produced by the process is high in smoothness and does not have sand holes or pin holes after the surface of the casting product is treated in a follow-up machining process, and accordingly yield of molded inner container products is greatly increased.
Owner:CHUZHOU JINNUO INDAL
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