744 results about "Layer wise" patented technology

An integrated scaffold for bone tissue engineering has a tubular outer shell and a spiral scaffold made of a porous sheet. The spiral scaffold is formed such that the porous sheet defines a series of spiral coils with gaps of controlled width between the coils to provide an open geometry for enhanced cell growth. The spiral scaffold resides within the bore of the shell and is integrated with the shell to fix the geometry of the spiral scaffold. Nanofibers may be deposited on the porous sheet to enhance cell penetration into the spiral scaffold. The spiral scaffold may have alternating layers of polymer and ceramic on the porous sheet that have been built up using a layer-by-layer method. The spiral scaffold may be seeded with cells by growing a cell sheet and placing the cell sheet on the porous sheet before it is rolled.

An apparatus for forming at least one three-dimensional article by fusing parts of a powder bed layer-wise. The apparatus comprising a powder distributor and an energy beam for fusing the powder layer. Said powder distributor comprises a first part being an elongated rod provided movable at a predetermined distance above the powder bed and with its central axis in parallel with a top surface of said work table and second part being a metal foil having at least a first and a second opposite edge portions. Said metal foil is provided between said elongated rod and said work table, said first and second opposite edge portions are attached to said elongated rod so that a distance between said first and second edge portions is smaller than the distance between said first and second edge portions of said metal foil when said metal foil is in a flat position.

The present invention is directed to a 3DP(TM) material system ad method, and an article made therefrom. The method of the present invention includes building cross-sectional portions of a three-dimensional article, and assembling the individual cross-sectional areas in a layer-wise fashion to form a final article. The individual cross-sectional areas are built by using an ink-jet printhead to deliver an aqueous fluid to a particulate material that includes plaster.

The present invention is directed to three-dimensional printing material systems and method, and an article made therefrom. The method of the present invention includes building cross-sectional portions of a three-dimensional article, and assembling the individual cross-sectional areas in a layer-wise fashion to form a final article. The individual cross-sectional areas are built by using an ink-jet printhead to deliver a fluid to a particulate material that includes particulate material.

The invention discloses a method and an apparatus for fixed-pointing the layer-wise variable precision in a convolutional neural network. The method comprises the following steps: estimating fixed-pointing configuration input to various layers in the convolutional neural network model respectively in accordance with input network parameters and a value range of input data; based on the acquired fixed-point configuration estimation and the optimal error function, determining the best fixed-point configuration points of the input data and network parameters of various layers and outputting the best fixed-point configuration points; inputting respectively the input data which is subject to fixed-pointing and an input data of an original floating-point number as a first layer in the convolutional neural network and computing the optimal fixed-point configuration point of the output data of the layer, and inputting the output result and an output result of the original first layer floating-point number as a second layer. The rest of the steps can be done in the aforementioned manner until the last layer completes the whole fixed-pointing. The method of the invention guarantees the minimum precision loss of each layer subject to fixed-pointing of the convolutional neural network, can explicitly lower space required by storing network data, and can increase transmitting velocity of network parameters.

The invention discloses a device and method for executing artificial neural network self-learning operation. The device comprises an instruction storage unit, a controller unit, a data access unit, an interconnection module, a primary operation module and a plurality of secondary operation modules. According to the device and method, the self-learning pre-training of a multilayer neural network can adopt a layer-by-layer training manner; for each layer of network, the self-learning pre-training is completed after multiple operations are iterated until the weight is updated to be smaller than a certain threshold value. Each iteration process can be divided into four stages, calculation is carried out in the first three stages to respectively generate a first-order hidden layer median, a first-order visible layer median and a second-order hidden layer median, and the weight is updated in the last stage by utilizing the medians in the first three stages.

The present invention relates to methods and apparatuses for an automated reinforced concrete construction system for onsite slip-form molding and casting a variety of cementitious mixes in a cast in place leave in place externally moldable flexible reinforced containment sleeve providing a wide variety of interchangeable full-scale molding configurations simultaneously optimizing a wide variety of cementitious mix curing characteristics, further having optional internal reinforcement net(s), for layer wise interlocking additive printed brick deposition providing improved slip-form mold casting of a wide variety of reinforced concrete structures; the present invention further includes a variety of operating platforms suitable for on and offsite construction as disclosed herein.

The present invention provides implantable medical devices coated with polyelectrolyte assemblies that are fabricated by layer-by-layer deposition of nucleic acid and polycation. Such devices facilitate the local delivery of a nucleic acid contained in the polyelectrolyte assembly into a cell or tissue at an implantation site. Also provided are methods of fabricating and using implantable medical devices according to the invention.

A decomposable thin film comprising a plurality of alternating layers of net positive and negative charge. At least a portion of the positive layers, the negative layers, or both, comprise a polyelectrolyte.

A process for production of a powder suitable for use in a process for the layer-by-layer moldless production of a three-dimensional shaped article, in which regions of the respective powder layer are selectively melted via input of electromagnetic energy, comprising mixing of a polymer or copolymer with at least one water-soluble polymeric polyol, the dissolution of the mixture in water to form a dispersion, the isolation of the polymer particles or copolymer particles from the dispersion, and the washing and drying of the isolated polymer particles or isolated copolymer particles; a powder which comprises a polymer powder or copolymer powder with from 0.001% by weight to 5% by weight content of at least one polymeric polyol, the polymeric polyol having been selected from the group consisting of polyethylene glycols and polyvinyl alcohols; the powder formed from the process; method of using the powder; and a shaped article formed from the powder.

The present invention relates to a polymer powder composed of polyamide or of copolyamides, which also comprises flame retardant, in particular phosphonates, to a layer-by-layer process which selectively melts regions or selectively binds them, and also to moldings produced from this polymer powder. Compared with conventional products, the moldings constructed using the powder of the invention exhibit marked advantages in flammability and combustibility and drop behavior, particularly with respect to UL® (Underwriters Laboratories) classification. Furthermore, moldings produced from polymer powder of the invention have adequately good mechanical properties when compared with moldings based on polymer powders without flame retardant, in particular in terms of modulus of elasticity and tensile strain at break. In addition, these moldings also have a density close to that of injection moldings.

A method of increasing ALP briefly, a preferred embodiment of the present invention includes a method of increasing ALP throughput by continuously modulating gas flow in a reactor to achieve layer by layer growth on a wafer. A first reactant is introduced with a percentage of a carrier gas. After a first time interval, the first reactant flow is reduced while the carrier gas flow is increased so as to maintain an approximately constant total gas flow. When the first reactant flow reaches a minimal, predetermined amount, a second reactant flow is initiated and increased while the carrier gas flow is decreased so as to continue a constant total gas flow. The method alternatively includes introducing a substance that enhances reactant adsorption and chemisorption, either as a first applied gas that reacts with the surface or as an added ligand to the reactant. Still further alternatives include a periodic rapid thermo anneal for improving film properties, parallel wafer processing and a reactant reservoir.

The present invention relates to a method for conveying particulate material during the manufacture of patterns in layers, wherein powder is conveyed out of a reservoir into a spreader unit and, if applicable, excess powder fed to the spreader unit is again conveyed back into the reservoir and wherein this conveying takes place in a closed conveying circuit.

A medical device at least a portion of which has a degradable coating, the coating degrading in an aqueous environment, and to methods of making and using the same. The coating may be a layer-by-layer coating, the first layer comprising a material having a positive charge and the second layer comprising a material having a negative charge.

The invention discloses a method for producing three-dimensional matter via plating layer-to-layer, which comprises following steps: building a computer solid model of three-dimensional matter to be sliced and layered; the computer controls the operation of printing injector and injecting UV liquid material according to the molding information of each layer to be solidified via ultraviolet light to form a layer with the same shape and strength of molding information; injecting support material in the non-injected area as support; adhering each layer to produce designed three-dimensional matter; removing filled support material of each layer to attain the three-dimensional matter of said computer solid model. The invention can quickly, reliably, and safely produce complex three-dimensional matter and composite color three-dimensional matter with lower cost. Wherein, the molding material in said invention is innocuous, therefore, the invention can be used in office.

The instant invention relates to a method for changing characteristics of a plastic component, wherein a medium is introduced into the plastic component, which encompasses a porosity and wherein the medium forms a homogenous compound with the plastic component by at least partially dissolving the plastic component.

A process and a device for producing a three-dimensional object is provided, with which process or device the object is produced by layer-wise solidification of a pulverulent material by sintering of the material at the points corresponding to the cross-section of the object by means of the action of radiation energy. The process comprises the application of a layer of the pulverulent material onto a substrate or a previously sintered layer, pre-heating of the pulverulent material to a working temperature below the temperature at which the powder is sintered and sintering of the material at the points corresponding to the cross-section of the object in the layer, wherein a step of controlled heating of an applied powder layer and of determining the quantity of heat taken up by the powder per (FIG. 3) temperature interval for at least two temperature intervals is carried out.

A three dimensional object creation system that prints objects layer by layer, the system including a plurality of printheads, the system printing at least part of each of multiple layers simultaneously.

The invention relates to a negative pressure-based device and a negative pressure-based method for manufacturing porous textures by laser sintering and quick molding. The device comprises an X-Y workbench, wherein a pair of guide rails is arranged on the workbench, and the guide rails have a powder spreading roller and a power spreading groove which can move reciprocally along the guide rails; the X-Y workbench is provided with a molding tank, and a molding workbench capable of moving vertically is arranged in the molding tank; the molding workbench consists of a screen with holes distributed densely and a carriage, and a negative pressure chamber is formed on the lower surface of the molding workbench; the bottom end of the negative pressure chamber is connected with a screw and a servo motor in turn; an absorption tube is communicated with the negative pressure chamber through an opening; and the other end of the absorption tube is connected with a filter and a vacuum pump in turn. In the invention, based on a negative pressure absorption principle, powder which is not sintered on each layer is removed and recycled through an absorption tube; and through layer-by-layer absorption, the powder which is not sintered and solidified is cleaned completely, while the sintered and solidified powder is continuously stacked and overlaid to form parts, so that the manufacturing of the porous texture with an aperture of less than 1mm is realized through selective laser sintering and quick molding.

A method for the layer-by-layer assembly of a free standing thin film includes the steps of preparing a support with a suitable substrate; forming a thin film having a plurality of layers onto the substrate utilizing a layer-by-layer assembly process; removing the substrate and thin film from the support; and separating the substrate from the thin film. Various compounds improving the strength, flexibility, tension and other mechanical properties may be included in the assembly to improve the structural quality of the film. Similar effect may also be achieved by cross-linking the applied layers.