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High volume delivery system for gallium trichloride

The present invention is related to the field of semiconductor processing equipment and methods and provides, in particular, methods and equipment for the sustained, high-volume production of Group III-V compound semiconductor material suitable for fabrication of optic and electronic components, for use as substrates for epitaxial deposition, for wafers and so forth. In preferred embodiments, these methods and equipment are optimized for producing Group III-N (nitrogen) compound semiconductor wafers and specifically for producing GaN wafers. Specifically, the precursor is provided at a mass flow of at least 50 g Group III element / hour for a time of at least 48 hours to facilitate high volume manufacture of the semiconductor material. Advantageously, the mass flow of the gaseous Group III precursor is controlled to deliver the desired amount.
Owner:S O I TEC SILICON ON INSULATOR THECHNOLOGIES

Expanded beam optical fibre connector

The present invention relates to an optical connector for use in a fibre optic communications system, and particularly an expanded beam optical connector (20) for connecting optical fibres. The connector (20) comprises a housing (6), a port (48) within the housing for receiving an end (35) of an optical fibre (38), a cylindrical ferrule (32) within the housing (6) having opposite first and second ends (33, 35), and an optical fibre stub held axially (14) within the ferrule (32) and extending between said ferrule ends (33, 35). The connector (20) also has a lens (8) for projecting and/or receiving an expanded beam (40) optically coupled with the optical fibre stub at the first ferrule end (33). A sleeve (34) surrounds the ferrule (32) and extends towards the port (48) axially away from the second ferrule end (35) to present an open end to the sleeve for receiving a termination ferrule (36) of an optical fibre (38) inserted into the port. The connector (20) has a connector portion (2, 4, 5) for connecting the optical fibre connector (20) to another expanded beam optical fibre connector so that said expanded beam (40) traverses between the connectors. A channel (28) extends through the housing (6) from the port (48) towards the lens (8), the ferrule (32) being secured by means of a cured adhesive (30) to the housing (6) and in alignment with respect to the lens (8), the open end of the sleeve (34) and/or the second end (35) of the ferrule being surrounded by a void (60) within the channel (28).
Owner:FIBERCO

Continuous deposition process and apparatus for manufacturing cadmium telluride photovoltaic devices

A continuous deposition process and apparatus for depositing semiconductor layers containing cadmium, tellurium or sulfur as a principal constituent on transparent substrates to form photovoltaic devices as the substrates are continuously conveyed through the deposition apparatus is described. The film deposition process for a photovoltaic device having an n-type window layer and three p-type absorber layers in contiguous contact is carried out by a modular continuous deposition apparatus which has a plurality of processing stations connected in series for depositing successive layers of semiconductor films onto continuously conveying substrates. The fabrication starts by providing an optically transparent substrate coated with a transparent conductive oxide layer, onto which an n-type window layer formed of CdS or CdZnS is sputter deposited. After the window layer is deposited, a first absorber layer is deposited thereon by sputter deposition. Thereafter, a second absorber layer formed of CdTe is deposited onto the first absorber layer by a novel vapor deposition process in which the CdTe film forming vapor is generated by sublimation of a CdTe source material. After the second absorber layer is deposited, a third absorber layer formed of CdHgTe is deposited thereon by sputter deposition. The substrates are continuously conveyed through the modular continuous deposition apparatus as successive layers of semiconductor films are deposited thereon.
Owner:CHEN YUNG TIN

Single-layer prefabricated assembly type reinforced concrete beam-column joint

The invention relates to a prefabricated reinforced concrete beam-column joint, in particular to a single-layer prefabricated assembly type reinforced concrete beam-column joint. In order to solve the problem that the connection integrity of existing prefabricated beams and prefabricated columns is hard to guarantee, the prefabricated joint for one-piece casting manufacturing of a column section and part of beam sections is provided according to the concept of the point of inflection. The single-layer prefabricated assembly type reinforced concrete beam-column joint is formed by overall manufacturing of a vertical column section (1) and joint superposed beam sections (2) in a factory for prefabrication. A manufacturing method comprises the steps of beam-column longitudinal bar and stirrup binding, connector pre-burying, formwork erecting and concrete pouring and curing. The height of the vertical column section (1) of the joint is 1/2 of the storey height, and the length of each joint superposed beam section (2) is 1/3 of the span of adjacent columns. The vertical column section (1) comprises a pouring section (1-1), a concrete filled steel tube connector (1-2), a steel tube connector (1-3) and column section longitudinal bars (1-4). Each joint superposed beam section (2) comprises a groove-shaped pouring section (2-1), inverted-T-shaped structural steel connectors (2-2) and a reinforcement cage framework (2-3). The single-layer prefabricated assembly type reinforced concrete beam-column joint is applied to the construction industry.
Owner:HARBIN INST OF TECH

Method for calculating lighting parameters and carrying out relighting rendering based on image and model

The invention discloses a method for calculating lighting parameters and carrying out relighting rendering based on an image and a model, comprising the following steps: (1) using a 3D point cloud model of a scene to calculate the normal vector of each 3D point; (2) calculating the light source position and direction vector of an image according to the coordinates and the normal vector of each 3D point and the pixel value of the image; (3) by supposing that the lighting model of the image is a Phong model, calculating the parameters of an energy function in the model based on the light source information obtained in the previous step; (4) calculating the shadow and highlight areas of the image; and (5) giving a target RGB image to be rendered, fusing and rendering the scene and lighting information of the original image into the target image, and outputting a final rendering result. By using the method, the relighting process of special-effects production in film and television post-production is simplified, the relighting rendering result can be output quickly, and a user can preliminarily judge whether an input image is applicable to later virtual-real combination. The problem that rework is caused as the lens and post-production inconsistency cannot be found in the existing film and television production process is solved.
Owner:ZHEJIANG UNIV

System and method for immersive operations intelligence

Systems and methods are provided for conducting business activities related to an industrial facility to achieve immersive operations intelligence. Immersive technology is used visualize a subject facility, and to access resources that may be required to design, test, operate, maintain and improve the facility. Resources may include personnel, data, models, work flows, historical data, and real-time data, e.g., audio, video, sensor, instrumentation data, etc.
Owner:CHEVROU USA INC
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