37results about How to "Performance degradation can be reduced" patented technology

A method for brain tumor segmentation in multi-parametric 3D magnetic resonance (MR) images, comprising: determining, for each voxel in the multi-parametric 3D MR image sequence, a probability that the voxel is part of brain tumor; extracting multi-scale structure information of the image; generating multi-scale tumor probability map based on initial tumor probability at voxel level and multi-scale structure information; determining salient tumor region based on multi-scale tumor probability map; obtaining robust initial tumor and non-tumor label based on tumor probability map at voxel level and salient tumor region; and generating a segmented brain tumor image using graph based label information propagation. The present invention is capable of achieving statistical reliable, spatially compact, and robust tumor label initialization, which is helpful to the accurate and reliable tumor segmentation. And the label information propagation framework could partially alleviate the performance degradation caused by image inconsistency between images to be segmented and training images.

A technique capable of constructing a disaster recovery system reduced in performance degradation of a primary system is provided. The technique includes a step of conducting synchronous writing of log information into a secondary storage subsystem in a secondary system when a write request received from a host computer is a write request of log information, a step of temporarily storing a write request and conducting asynchronous writing into the secondary storage subsystem when the received write request is a write request of database data or status information, a step of modifying log information, data in a database area, and status information in the secondary storage subsystem according to contents of a write request received from a primary storage subsystem, and a step of recovering the database area according to contents of log information in a location indicated by the status information.

A method and apparatus for leveraging spare disks in a data storage system. Specifically the present invention describes a method for data recovery and redundancy in a data storage system having a plurality of disk drives. The data storage system is grouped into a plurality of arrays having data redundancy. The plurality of arrays is arranged in an optimum combination of arrays of mirrored pairs of disk drives, arrays of three disk drives in a redundant array of independent disks (RAID) configuration, and arrays of more than three disk drives in a RAID configuration to maximize performance while providing data redundancy. For every failure of one of said plurality of arrays due to a failed disk drive, a new array having data redundancy in a RAID configuration is dynamically created in said plurality of arrays. The new array is optimized for best performance and contains information from the failed disk drive.

An apparatus and method for adaptively adjusting a target Received Signal Strength Indicator (RSSI) for Automatic Gain Control (AGC) in a full-duplex relay apparatus with an interference cancellation function. A Signal to Interference Ratio (SIR) estimation block estimates an SIR based on an interference signal estimated from a received signal and an interference-cancelled signal determined by cancelling the estimated interference signal from the received signal. A target RSSI determination block determines a target RSSI according to the estimated SIR. An AGC block adjusts a gain for the received signal based on the determined target RSSI.

A method and system for storing instructions retrieved from memory in a memory cache to provide said instructions to a processor. First a new instruction is received from the memory. The system then determines whether the new instruction is a start of a basic block of instructions. If the new instruction is the start of a basic block of instructions, the system determines whether the basic block of instructions is stored in the memory cache responsive. If the basic block of instructions is not stored in the memory cache, the system retrieves the basic block of instructions for the new instruction from the memory. The system then stores the basic block of instructions in a buffer. The system then predicts a next basic block of instructions needed by the processor from the basic block of instructions. The system determines whether the next block of instructions is stored in the cache memory and retrieves the next basic block of instructions from the memory if the next block of instructions is not stored in memory.

A method for channel estimation in an Orthogonal Frequency Division Multiplexing (OFDM) system, including: a transmitter determining a distribution density of pilot OFDM symbols according to the maximum Doppler frequency shift supported by the system, and transmitting pilot OFDM symbols and data OFDM symbols based on the distribution density of the pilot OFDM symbols; a receiver estimating frequency-domain channel information of the data OFDM symbols according to the received pilot OFDM symbols. The invention solves the problem of a large performance loss at a high-delay channel and a system with rapidly varying channel. The invention offers a better performance of channel estimation while the channel environment is varying rapidly, enhances the performance of a high-delay channel, makes a data communication system more suitable to a changing environment and makes better performance to the practical channel estimation, so that the data transmission efficiency of the system is increased.

A first rotor core including a plurality of gaps penetrating through the first rotor core along an axial direction is provided. A second rotor core being in contact with an axial end of the first rotor core and having a plurality of magnet-housing slots facing the gaps is also provided. The gaps have a magnetic resistance lower than that of the magnet-housing slots.

Dynamic interface management for interference mitigation is disclosed. In one aspect, an integrated circuit (IC) is provided that employs a control system configured to mitigate electromagnetic interference (EMI) caused by an aggressor communications bus. The control system is configured to receive information related to EMI conditions and adjust a data/clock mode of an interface corresponding to the aggressor communications bus. In this manner, the interface is configured to couple to the aggressor communications bus. The interface is configured to transmit signals to and receive signals from the aggressor communications bus. The control system is configured to use the information related to the EMI conditions to set the data/clock mode of the interface to mitigate the EMI experienced by a victim receiver. Thus, the control system provides designers with an additional tool that may reduce performance degradation of the victim receiver attributable to EMI.

An apparatus having a plurality of insulating layers, a plurality of conductive layers and a plating is disclosed. The conductive layers may be separated by the insulating layers. A first pattern in a first of the conductive layers generally extends to an edge castellation. A second pattern in a second of the conductive layers may also extends to the edge castellation. The plating may be disposed in the edge castellation and connect the first pattern to the second pattern. The plating in the castellation may extend at most between a subset of the conductive layers.

The present disclosure relates to a 5G or pre-5G communication system for supporting a data rate higher than that of 4G communication systems such as LTE systems. A method for controlling a device having a plurality of radio frequency (RF) chains coupled to a plurality of antennas in a wireless communication system according to an embodiment of the present invention includes comparing a measured temperature of the device with a temperature threshold, controlling status of at least one of the RF chains according to a comparison result between the measured temperature and the temperature threshold, and transmitting a radio signal using at least one of the antennas that is connected to the at least one RF chain.

Aspects of priority arbitration for interference mitigation are disclosed. In one aspect, a computing device is provided that employs a control system configured to arbitrate the activity of multiple interfaces. This arbitration mitigates potential electromagnetic interference (EMI) that may degrade the performance of the computing device. Upon a first interface requesting to become active, the control system is configured to determine if a second interface is currently active. If so, the control system is configured to arbitrate the activity of the first interface and the second interface to mitigate the potential EMI generated if the interfaces are concurrently active. The computing device includes an aggressor controller and a victim receiver, each corresponding to a particular interface. The control system is configured to arbitrate such activity so that the aggressor controller and corresponding cable do not generate EMI during a time period that would degrade the performance of the victim receiver.

Dynamic lane management for interference mitigation is disclosed. In one aspect, an integrated circuit (IC) is provided that employs a control system configured to mitigate electromagnetic interference (EMI) caused by an aggressor communications bus. The control system is configured to receive information related to EMI conditions and adjust which lanes of the aggressor communications bus are employed for signal transmission. The IC includes an interface configured to couple to the aggressor communications bus. The interface is configured to transmit signals to and receive signals from the aggressor communications bus. The control system is configured to use the information related to the EMI conditions to assign signals to be transmitted via particular lanes of the aggressor communications bus to mitigate the EMI experienced by a victim receiver. The control system provides designers with an additional tool that may reduce the performance degradation of the victim receiver attributable to EMI.

A system and method for downlink power optimization in a partitioned wireless backhaul network with out-of-neighborhood utility evaluation is disclosed. The method comprises performing initial downlink power optimization for each neighborhood independently, considering only in-neighborhood utilities, by obtaining the transmit powers of all hubs and a utility performance of all served remote backhaul modules (RBMs) in the neighborhood. Power optimization data for each neighborhood are then reported to a central processing unit for storage. Thereafter, for each neighborhood, an out-of-neighborhood utility evaluation is performed by the centralized processing unit, based on reported power optimization data from other neighborhoods, for example, by obtaining delta out-of-neighborhood sum utilities for each hub as a function of hub transmit power, by curve fitting of reported data. Power optimization for each neighborhood is then performed by optimizing both in-neighborhood sum utilities and out-of-neighborhood sum utilities, and hub transmit powers are updated accordingly.

One embodiment of the present invention includes a hash selector that facilitates performing effective hashing operations. In operation, the hash selector creates a transformation matrix that reflects specific optimization criteria. For each hash value, the hash selector generates a potential hash value and then computes the rank of a submatrix included in the transformation matrix. Based on this rank in conjunction with the optimization criteria, the hash selector either re-generates the potential hash value or accepts the potential hash value. Advantageously, the optimization criteria may be tailored to create desired correlations between input patterns and the results of performing hashing operations based on the transformation matrix. Notably, the hash selector may be configured to efficiently and reliably incrementally generate a transformation matrix that, when applied to certain strides of memory addresses, produces a more uniform distribution of accesses across caches lines than previous approaches to memory addressing.

Fifth Generation (5G) Millimeter Wave (mmWave) cellular networks are expected to serve a large set of throughput intensive, ultra-reliable, and ultra-low latency applications. To meet these stringent requirements, while minimizing the network cost, the 3^rd Generation Partnership Project has proposed a new transport architecture, where certain functional blocks can be placed closer to the network edge. In this architecture, however, blockages and shadowing in 5G mmWave cellular networks may lead to frequent handovers (HOs) causing significant performance degradation. To meet the ultra-reliable and low-latency requirements of applications and services in an environment with frequent HOs, a Fast Inter-Base Station Ring (FIBR) architecture is described, in which base stations that are in close proximity are grouped together, interconnected by a bidirectional counter-rotating buffer insertion ring network. FIBR enables high-speed control signaling and fast-switching among BSs during HOs, while allowing the user equipment to maintain a high degree of connectivity. The FIBR architecture efficiently handles frequent HO events in mm Wave and/or Terahertz cellular systems, and more effectively satisfies the QoS requirements of 5G applications.

Aspects of adjusting application parameters for interference mitigation are disclosed. In one aspect, a computing device is provided that employs a control system configured to detect and mitigate electromagnetic interference (EMI) generated within the computing device. More specifically, the control system is configured to detect possible EMI conditions and adjust parameters within the computing device to mitigate such EMI. In this manner, the computing device includes an aggressor application and a victim receiver. The control system is configured to analyze performance tradeoffs based on an acceptable performance level of the aggressor application and the performance degradation experienced by the victim receiver. Based on such analysis, the control system is configured to adjust parameters associated with the aggressor application to mitigate the EMI. Thus, the control system provides designers with an additional tool that may reduce the performance degradation of the victim receiver attributable to the EMI.

Systems and methods that provide a barrier for protection of active layers associated with a vertical multi junction (VMJ) photovoltaic cell. Buffer zone(s) in form of an inactive layer(s) arrangement safe guard the active layers against induced stress or strain resulting from external forces/thermal factors (e.g., welding). The buffer zone can be in form of a rim on a surface of an end layer of a cell unit, to act as a protective boundary for such active layer, and to further partially frame the VMJ cell for ease of handling and transportation.