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2210results about How to "Avoid restrictions" patented technology

System employing threaded space-time architecture for transporting symbols and receivers for multi-user detection and decoding of symbols

A threaded space-time (TST) architecture in a multiple antenna wireless communication system uses the coded transmission in each layer of a transmission resource array as a space-time code. Each layer of a layer set is active during all available symbol transmission intervals, and each of the transmit antennas are used equally often, such that layers each transmit a symbol using a different antenna during each symbol transmission interval. A receiver is provided for multi-user reception using an iterative, soft-input / soft-output (SISO) multi-user detection algorithm based on minimum mean square error (MMSE) criterion, among other methods.
Owner:DIRECTV LLC

Medical devices containing radiation resistant block copolymer

The present invention relates generally to radiation-resistant medical devices which contain polymer regions for release of therapeutic agents. The present invention also relates to radiation-resistant block copolymer materials for use in connection with insertable or implantable medical devices. The radiation-sterilized medical device comprise (a) a release region and (b) at least one therapeutic agent and the release region comprises a radiation resistant copolymer that includes (i) a low Tg hydrocarbon polymer block and (ii) one or more high Tg polymer blocks.
Owner:BOSTON SCI SCIMED INC

Message forwarding method and device

The invention discloses a message forwarding method and device. The method and the device are applied to a virtual system comprising core backbones (CBs) and port extenders (PEs), device identification of each PE and local unit identification and global unit identification of chips in each PE are configured on each CB, the local unit identifications in corresponding PEs uniquely identify the chips in the PEs, and the global unit identifications uniquely identify the chips in the virtual system. The method includes that after the CBs receive redirected messages of the PEs from downlink ports of the CBs, source chip identifications in the messages are mapped to corresponding global unit identifications from the local unit identifications, forwarding table entry study is performed according to the global unit identifications, and when the messages are forwarded to the PEs from the downlink ports of the CBs, destination chip identifications in the messages are mapped to the local unit identifications from the global unit identifications. By means of the message forwarding method and device, the capacity of the virtual system can be increased.
Owner:NEW H3C TECH CO LTD

Method for measuring diameter and straightness accuracy parameters of seamless round steel pipe

The invention relates to a method for measuring the diameter and the straightness accuracy parameters of a seamless round steel pipe. The method includes the steps as follows: accomplishing the calibration of parameters of a multi-linear structured light vision sensor formed by one video camera and multi-line laser projectors; distributing the multi-linear structured light vision sensors on the periphery of the seamless round steel pipe to be tested; respectively controlling the laser projectors to project structured light plane onto the measured section of the seamless round steel pipe by a computer, collecting the images of laser stripes on the surface of the seamless round steel pipe and processing the images of the laser strip by a video camera, and calculating the three-dimensional coordinates of different sections according to a measurement model; determining the elliptical center of each section of the space, realizing the measurement of the straightness accuracy of the seamless round steel pipe and establishing the dynamic and virtual central axis of the seamless round steel pipe; establishing the reference plane of the dynamic and virtual projection of ellipse of the section of the space; and front projecting the ellipse of the section of the space onto the reference plane of the dynamic and virtual projection, and carrying out the operation of circle fitting on the reference plane, thereby obtaining the section circle of the steel pipe. The method can realize the on-line, real-time, automatic and noncontact measurement of the diameter and the straightness accuracy parameters of the seamless round steel pipe.
Owner:TIANJIN UNIV

Distributed optical fiber vibration sensing method and apparatus thereof

The present invention relates to a distributed optical fibre vibration sensing method based on double loop Mach-Zehnder interference and its equipment. Said equipment includes the following several portions: laser, fiber-optic coupler, two sensing optical fibres, optical circulator and photoelectric detector. Besides, said invention also provides the concrete steps for implementing the invented distributed optical fibre vibration sensing method.
Owner:武汉光谷光联网科技有限公司

Method for creating three-dimensional model by using sketch

InactiveCN101799937AImprove naturalness and freedomImprove versatility3D modellingEngineeringTheoretical computer science
The invention discloses a method for creating a three-dimensional model by using a sketch, which comprises the following steps of: dividing strokes of a freehand sketch into primitive strokes functioning as the outline of an object and threaded strokes acting as three-dimensional effect, identifying the strokes respectively and regularizing the primitive strokes; indicating the geometric constitution of the object by using a conditional rule generation method and realizing rule-driven reasoning by using primitive adjacency relationship under the guidance of drawing threads so as to identify object units and recover the depth information of each object unit; automatically discriminating and completing hidden lines of the object units according to geometric attributes of the object units under the guidance of a drawing thread rule so as to generate a complete three-dimensional object unit; and recreating the three-dimensional model of the object by using a geometric splicing method according to topological relation among the object units. The method has the advantages of expressing the three-dimensional effect with auxiliary threads, such as shade lines and the like, and drawing the perspective projection outline of the object with the freehand sketch so as to improve the degree of freedom of drawing.
Owner:NANJING UNIV
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