摘要:
A method and apparatus for CT image reconstruction may include selecting, by a unit, projection data of the same height on a curve having a curvature approximate to that of the scanning circular orbit, implementing, by a unit, a weighting processing on the selected projection data, filtering, by a unit, the weighting processed projection data along a horizontal direction, implementing, by a unit, three-dimensional back projection on the filtered projection data along the direction of ray. The method and apparatus can effectively eliminate cone beam artifact under a large cone angle.
摘要:
The present invention discloses a millimeter-wave inspection apparatus. The millimeter-wave inspection apparatus comprises: optics devices, configured to receive millimeter-wave energy radiated from an object to be inspected and focus the received millimeter-wave energy; a radiometer receiving device configured to receive the focused millimeter-wave energy and transform the millimeter-wave energy into electrical signal; and an imaging device configured to generate a temperature image of the object to be inspected based on the electrical signal. Compared with the prior art, the millimeter-wave inspection apparatus of the present invention has a simple and compact structure; it would not be harmful to the human health by employing the passive millimeter-wave human body security inspection technology. With the above configuration, the contraband items to be concealed within the human clothing can be efficiently and effectively detected.
摘要:
A method and system for automatically aligning multiple MR volumes in whole-body MR scans is disclosed. The method and system are capable of automatic alignment of leg-volumes in whole-body MR scans that is insensitive to leg movement. In order to align upper and lower MR volumes, an automatic determination may be made that a junction between the upper and lower MR volumes is in a leg region. The lower MR volume is then divided into left and right regions, and each of the left and right regions are independently aligned with the upper MR volume. One of the left and right regions is then adjusted with respect to the other one to compensate for shifting of the legs with respect to each other.
摘要:
The present invention discloses a device and method for processing beamforming frequency. The device for processing beamforming frequency includes a setting unit, an encoding unit, a mapping unit and a beam grouping generating unit, wherein the setting unit is used for setting an encoding matrix; the encoding unit is used for encoding input initial data according to the encoding matrix; the mapping unit is used for obtaining encoded column data from the encoding unit and mapping the encoded column data to antenna groups corresponding to subspaces; and the beam grouping generating unit is used for generating beam groups corresponding to the antenna groups. The method for processing beamforming frequency includes: setting an encoding matrix; encoding initial data according to the encoding matrix; mapping encoded column data to antenna groups corresponding to subspaces; and generating beam groups corresponding to the antenna groups.
摘要:
A lifting apparatus includes a vertical guide device, a turntable device which is movable along the vertical guide device upwards or downwards, and a first driving device which drives the turntable device moving in an upward and downward direction guided by the vertical guide device. The turntable device includes a bracket which is slidably engaged with the vertical guide device and projects perpendicularly toward a side of the vertical guide device, a turntable which is rotatably provided on the bracket, and a second driving device which rotates the turntable on the bracket.
摘要:
Provided are techniques for allowing consumers to reserve a resource, in which potential consumers have a choice among a number of different reservation contracts for reserving a resource to be provided at a future time. Each reservation contract allows a corresponding contracting customer to elect whether to receive the resource and requires the contracting customer to make a first payment in aggregate if the resource ultimately is elected and to make a second payment in aggregate if the resource ultimately is not elected, with the first payment being higher than the second payment, and with both being nonzero.
摘要:
A monitoring system is presented. The monitoring system includes a plurality of sensing devices disposed at various locations of a vehicle to generate signals comprising vibration and acoustic data of the vehicle, a processing device configured to determine one or more events based upon the generated signals, and generate alert messages based upon the one or more events.
摘要:
A method for phase contrast imaging comprises: illuminating an object by terahertz radiation such that the terahertz radiation interacts with the object; illuminating a diffraction grating by the terahertz radiation that has interacted with the object; translating the diffraction grating along the direction of the grating wave vector, to measure, for each of different grating positions, an intensity distribution of the terahertz radiation that has interacted with the object and with the grating in a diffraction field; and retrieving a phase contrast image of the object from the intensity distributions. An apparatus for phase contrast imaging is also provided.
摘要:
A method, information processing system, and computer program product manage server placement of virtual machines in an operating environment. A mapping of each virtual machine in a plurality of virtual machines to at least one server in a set of servers is determined. The mapping substantially satisfies a set of primary constraints associated with the set of servers. A plurality of virtual machine clusters is created. Each virtual machine cluster includes a set of virtual machines from the plurality of virtual machines. A server placement of one virtual machine in a cluster is interchangeable with a server placement of another virtual machine in the same cluster while satisfying the set of primary constraints. A server placement of the set of virtual machines within each virtual machine on at least one mapped server is generated for each cluster. The server placement substantially satisfies a set of secondary constraints.