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125results about How to "Reduce crosstalk effects" patented technology

Droplet ejection apparatus and image forming apparatus

The droplet ejection apparatus includes: a droplet ejection head which has a plurality of nozzles arrayed two-dimensionally, droplets of liquid being ejected from the nozzles and deposited onto an image-rendering medium to form dots on the image-rendering medium; and a relative movement device which moves the droplet ejection head and the image-rendering medium relatively to each other in a relative movement direction, wherein: the droplet ejection head has a nozzle arrangement in which, out of the plurality of nozzles, a row of nozzles sharing a same liquid supply flow channel is divided into M (where M is an integer greater than one) nozzle group blocks and positions of all of the nozzles within each nozzle group block are shifted in the relative movement direction so as to provide a predetermined positional difference in the relative movement direction to the positions of the nozzles between the M nozzle group blocks, and the nozzle arrangement in which the nozzles are arrayed two-dimensionally is configured such that, between dots formed on the image-rendering medium by adjacent nozzles within a certain one nozzle row, at least one dot formed by a nozzle within another nozzle row is arranged so that the dots formed by the adjacent nozzles within the one nozzle row are arranged with an interval of N (where N is an integer greater than one) dots; the droplet ejection apparatus comprises M ejection drive devices which independently perform ejection control on the respective M nozzle group blocks; and the ejection drive devices carry out ejection drive on the nozzles within the same nozzle group block at ejection timing of a same phase, and also carry out ejection drive on the nozzles in different nozzle group blocks at different ejection timings with a phase difference corresponding to the positional difference.
Owner:FUJIFILM CORP

Synchronous prediction method for horizontal fractures and vertical fractures of orthogonal medium fracture type reservoir

The invention provides a synchronous prediction method for horizontal fractures and vertical fractures of an orthogonal medium fracture type reservoir. The method comprises steps of firstly, expressing an orthotropic disturbance matrix by utilizing longitudinal and transverse wave moduli and fracture weakness; secondly, deriving an orthogonal medium linearized longitudinal wave reflection coefficient equation represented by longitudinal and transverse wave moduli, density and crack weakness by utilizing a scattering function and a disturbance matrix; and lastly, expressing the linearized longitudinal wave reflection coefficient as a Fourier series expression, and establishing a three-step inversion method to estimate longitudinal and transverse wave moduli, density and fracture weakness, and thereby realizing multi-parameter inversion of the orthotropic medium. The method is advantaged in that on the basis of a Scheenberg linear sliding model, that crack weakness with more definite physical significance is directly used for representing the development conditions of horizontal cracks and vertical cracks in an orthogonal medium is proposed; an orthogonal medium longitudinal wave reflection coefficient equation is expressed as a Fourier series form, and crosstalk influence of crack weakness caused by horizontal cracks and crack weakness caused by vertical cracks is reduced.
Owner:CENT SOUTH UNIV +1

Seamless safe light curtain designed by cylindrical mirror

The invention relates to a seamless safety veiling designed by a cylinder mirror, which comprises an infrared emission member P1 and an infrared receiving member P2 which are arranged face to face, wherein, the emission member is infrared LED array and controlling circuit. A receiving end of the emission member is infrared receiving pipe PD array and the controlling circuit. Each LED corresponds with the infrared receiving pipe in opposite face and is arranged in the same straight line with the infrared receiving pipe. Two cylinder mirrors are respectively put on the same axle in the front of the lighting face and the receiving face. An emission pipe and a receiving pipe are respectively located on the corresponding focus of the cylinder mirror. A plurality of emission arrays/receiving arrays are connected by selecting communicating signal in series. A light filter plate is added between each infrared receiving pipe. The invention reduces the serial interference influence between the emitting unit and the receiving unit by using optics design. The detection blind zone is effectively removed. The invention is of simple structure, sensitive and accurate detection; therefore, the invention is applicable to far distance detection and can judge the size of shading object.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Resource allocation method of multi-core elastic optical network based on nodes and crosstalk perception

The invention relates to a resource allocation method of a multi-core elastic optical network based on nodes and crosstalk perception, and belongs to the technical field of optical fiber communication. The method comprises the following steps: determining node importance according to intermediary centrality of nodes, arranging the nodes in a descending order according to the node importance, and configuring a limited spectrum converter for the ordered optical network nodes according to a certain proportion value of the number of the optical network nodes; in a route selection stage of a service request, designing a path weight calculation method considering path load and a use proportion of a limited spectrum converter in a path, and arranging candidate paths in an ascending order; in the fiber core spectrum allocation stage, adopting a fiber core grouping and spectrum partitioning method, designing a fiber core spectrum selection method considering the compactness of spectrum intervals and the number of overlapped frequency slots of the spectrum intervals, and reducing the crosstalk value between fiber cores; for the service request with failed spectrum allocation, searching the available spectrum block for the service request again through the limited spectrum converter, so the probability of successful transmission of the service is improved.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
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