摘要:
A polar modulator including a signal converter configured to provide a phase signal and an amplitude signal based on at least one received signal is disclosed. A digital-to-analog converter is coupled to the signal converter, the digital-to-analog converter configured to receive an augmented signal, wherein a polarity of the augmented signal is selected to minimize an absolute phase change for sequential signals. A signal mixer is coupled to the digital-to-analog converter to receive an analog signal generated from the augmented signal.
摘要:
A method and system for evaluating fraud risk in an electronic commerce transaction between consumer and a merchant over a network is disclosed. The merchant requests service from the system over the network using a secure, open messaging protocol. An e-commerce transaction or electronic purchase order is received from the merchant, the level of risk associated with each order is measured, and a risk score is returned to the merchant. In one embodiment, data validation, highly predictive artificial intelligence pattern matching, network data aggregation and negative file checks are used to examine numerous factors to calculate fraud risk. The fraud screening system performs analysis that utilizes data elements submitted with the order, and includes data integrity checks and correlation analyses based on the characteristics of the transaction. Other analysis includes a comparative comparison of the current transaction against past known fraudulent transactions, and a search of a transaction history database to identify abnormal velocity patterns, name and address changes, and known defrauders. A risk score is generated and compared to the merchant's specified risk threshold. The result is returned to the merchant for order disposition. In one alternative, scoring algorithms are regularly refined through the use of a closed-loop risk modeling process that enables the service provided by the system to be fine-tuned to adapt to new or changing fraud patterns.
摘要:
A linear motor compressor including a compressor housing and a cylinder housing having a plurality of opposing compression chambers. A piston freely reciprocates within the cylinder housing using a linear electric motor. A piston position feedback control system provides adaptive current output as a function of position feedback and/or velocity feedback from the piston and/or the electric motor, to directly power and control the electric motor, wherein the piston reciprocates without assistance from a mechanical spring or other equivalent centering force.
摘要:
A linear motor compressor including a compressor housing and a cylinder housing having a plurality of opposing compression chambers. A piston freely reciprocates within the cylinder housing using a linear electric motor.
摘要:
A packet processing data path is attached to the processor bus as a slave via a bus interface. The packet processing data path comprises a number of blocks. Respective blocks comprise configuration registers operable to provide information on what operation the blocks should perform for the current packet field being processed. The bus interface comprises a first register operable to control a bus of Update Enable signals, which bus is also connected to the blocks. The bus interface also comprises a second register operable to control a Mode signal, which is also connected to the blocks. An Update Mode signal is connected to the bus interface and to the blocks. A write to the second register causes the Update Mode signal to be pulsed active, triggering the enabled configuration registers to update their values.
摘要:
A communication system has an audio receiver path, and a digital transceiver path, wherein both paths are integrated on a single integrated circuit. The audio receiver path has a concealment device, and the communication system also has at least one functional block connected to and shared by the both paths. The communication system has a digital controller connected to both paths, the at least one functional block, and the concealment device. The digital controller is operable to schedule the operation of the digital transceiver path, and to inform the concealment device of start and end points of the activity of the digital transceiver path. The concealment device is operable to mask interruptions in the audio stream from the audio receiver path caused during periods of activity of the digital transceiver path.