Abstract:
This invention relates to field of cloud storage technology and especially relates to a cloud storage data access method, apparatus and system. The data storing step comprises: creating parity values of original data on a data transmitting end before the original data is transmitted to multiple cloud storage centers; transmitting and storing the original data and the parity values according to a preset redundant storing rule into the cloud storage data centers separately; the data retrieving step comprises: following the preset redundant storing rule to access at least one of the cloud storage data centers into which the original data is stored according to an access request; determining whether the original data is available in the accessed cloud storage data center, if not available, retrieving the parity value of the original data and the data used to create the parity value from at least one of the other cloud storage data centers according to the preset redundant storing rule; restoring the original data from its parity value and the data used to create the parity value. This invention also provides a cloud storage data access apparatus and system. This invention has enhanced the data availability and fault tolerance of cloud storage.
Abstract:
Radio frequency (RF) power amplifier (PA) circuitry, which transmits RF signals is disclosed. The RF PA circuitry includes a final stage, a final stage current digital-to-analog converter (IDAC), and a final stage temperature compensation circuit. A final stage current reference circuit may provide an uncompensated final stage reference current to the final stage temperature compensation circuit, which receives and temperature compensates the uncompensated final stage reference current to provide a final stage reference current. The final stage IDAC uses the final stage reference current in a digital-to-analog conversion to provide a final stage bias signal to bias the final stage. The temperature compensation provided by the final stage temperature compensation circuit is selectable.
Abstract:
A multilayer substrate minimizing differential loss is presented. The multilayer substrate for providing signals between an integrated circuit and a printed circuit board consists of a number of alternating electrically conductive and insulating layers. Differential signals are routed through the core insulating layer using differential pairs of plated through holes (PTHs). In addition, the multilayer substrate includes a number of plated through holes, which provide ground signals between conductive layers separated by the core layer. The multilayer substrate is configured such that a PTH providing ground is situated between each differential pair of plated ground holes, where the center or axis of each plated through hole is aligned in a collinear configuration.
Abstract:
The present invention provides an OSGi-based heterogeneous service integrating system comprising a Java virtual machine and an OSGi container, the system further comprises a service management module, a handler management module, a monitor module, a service discovery module and a handler module that are running on said OSGi container, wherein: said service management module is adapted to monitor requests for registering and using of a remote service, to manage different types of services, and to notify said handler management module to make corresponding publishing and calling for different service configuration types; said handler management module is adapted to manage said handler module and to publish service to and call service from remote end points, and to call the corresponding handler module based on information delivered by the service management module, and to maintain information of currently published services and adopted remote services; said monitor module is adapted to monitor a local service registry in said OSGi container and to obtain information to be monitored from the service management module; said service discovery module is adapted to make remote service discovery; and said handler module is adapted to realize access of a module within the OSGi container to a service outside the OSGi container.
Abstract:
This invention relates to a method and apparatus for estimating artifacts in the image reconstruction of an object of interest (101). The inventive apparatus comprises a coil arrangement (105) comprising at least one transmitting coil (109, 109′) for generating a primary magnetic field to be applied to the object of interest (101), and at least one measurement coil (110, 110′) for measuring electrical signals induced by a secondary magnetic field, the secondary magnetic field being generated by the object of interest in response to the primary magnetic field; motion sensing means (112, 114, 112′, 114; 312, 314, 312′, 314′) for sensing a relative motion between the object of interest (101) and the coil arrangement (105) and generating a trigger signal when the relative motion occurs; and a processor (125) for calculating, in response to the trigger signal, a change of the conductivity distribution of the object of interest, based on the electrical signals measured before and after the relative motion, the change of the conductivity distribution representing artifacts caused by the relative motion.
Abstract:
A method and apparatus for subcarrier selection for systems is described. In one embodiment, the system employs orthogonal frequency division multiple access (OFDMA). In one embodiment, a method for subcarrier selection comprises a subscriber measuring channel and interference information for subcarriers based on pilot symbols received from a base station, the subscriber selecting a set of candidate subcarriers, providing feedback information on the set of candidate subcarriers to the base station, and receiving an indication of subcarriers of the set of subcarriers selected by the base station for use by the subscriber.
Abstract:
A method and apparatus for subcarrier selection for systems is described. In one embodiment, the system employs orthogonal frequency division multiple access (OFDMA). In one embodiment, a method for subcarrier selection comprises a subscriber measuring channel and interference information for subcarriers based on pilot symbols received from a base station, the subscriber selecting a set of candidate subcarriers, providing feedback information on the set of candidate subcarriers to the base station, and receiving an indication of subcarriers of the set of subcarriers selected by the base station for use by the subscriber.
Abstract:
A method is provided, comprising: copolymerizing a monomer comprising at least two amide groups, a monomer of formula (a) and a sulfonic acid or salt monomer, wherein R1 is CH3 or H. A polymer made by the method is provided. A method for coating an electrode is provided, comprising: providing an electrode; providing a solution of a free radical initiator, a monomer comprising at least two amide groups, a monomer of formula (a) and a sulfonic acid or salt monomer; wetting the electrode with the solution; and heating the wetted electrode; whereby the monomer comprising at least two amide groups, the monomer of formula (a), and the sulfonic acid or salt monomer are copolymerized; wherein R1 is CH3 or H. An electrode coated by the method is provided.
Abstract:
A print head (20, 220) includes a diaphragm (26) opposite a fluid chamber (21) having a side opening, a first end and a second end. The print head (20, 220) further includes a support (30, 32, 300, 302, 310, 312, 320, 322) extending from a floor (52) of the fluid chamber (21) to the diaphragm (26).
Abstract:
A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating at least one coherence cluster to a second subscriber.