1933results about How to "Maintain performance" patented technology

The system periodically measures the battery voltage of the toothbrush and the current in a stator portion of the motor for the appliance. The amplitude of movement of the toothbrush workpiece is determined from the measured stator current. A circuit / control program changes the duty cycle or pulse width of the drive signal from the motor if the battery voltage drops below a first threshold value and a circuit or control program changes the drive frequency of the appliance if the amplitude of the workpiece movement falls below a first threshold value. A circuit / control program terminates the operation of the toothbrush if the voltage drops below a second threshold value or if the amplitude drops below a second threshold value, both of which are less than the respective first thresholds.

A projector comprises a light source unit 63, a display device, a cooling fan, a light source side optical system for guiding light from the light source unit 63 to the display device, a projection side optical system for projecting an image emitted from the display device on to a screen, and a projector control unit for controlling the light source unit 63 and the display device. In addition, this light source unit 63 has a plurality of fan-shaped segment areas on a circular transparent base material 130 which can be controlled to rotate, layers 131 of different phosphors which emit light of predetermined wavelength bands by receiving excitation light being disposed on at least two of the segment areas on the transparent base material 130, and comprises an excitation light source 72 which shines excitation light within a visible light wavelength band on to the phosphors.

A data processing apparatus communicates data bits on a predetermined number of sub-carrier signals of an Orthogonal Frequency Division Multiplexed (OFDM) symbol. The data processing apparatus comprises a parity interleaver operable to perform parity interleaving on Low Density Parity Check (LDPC) encoded data bits obtained by performing LDPC encoding according to a parity check matrix of an LDPC code including a parity matrix corresponding to parity bits of the LDPC code, the parity matrix having a stepwise structure, so that a parity bit of the LDPC encoded data bits is interleaved to a different parity bit position. A mapping unit maps the parity interleaved bits onto data symbols corresponding to modulation symbols of a modulation scheme of the OFDM sub-carrier signals. A symbol interleaver is arranged in operation to read-into a symbol interleaver memory the predetermined number of data symbols for mapping onto the OFDM sub-carrier signals, and to read-out of the interleaver memory the data symbols for the OFDM sub-carriers to effect the mapping, the read-out being in a different order than the read-in, the order being determined from a set of addresses, with the effect that the data symbols are interleaved on the sub-carrier signals. The set of addresses are generated by an address generator which has been optimised to interleave the data symbols on to the sub-carrier signals of the OFDM carrier signals for a given operating mode of the OFDM system, such as a 32K operating mode for DVB-T2 or DVB-C2.

A procedure for clustering documents that operates in high dimensions, processes tens of thousands of documents and groups them into several thousand clusters or, by varying a single parameter, into a few dozen clusters. The procedure is specified in two parts: computing a similarity score representing the k most similar documents (typically the top ten) for each document in the collection, and grouping the documents into clusters using the similarly scores.

A method, system, and program for maintaining application operations within a suboptimal grid environment are provided. An application profile expresses the operational requirements of an application across multiple heterogeneous resource platforms and expresses the priority of modular breakdown of an application so that usage of resources by the application can be adjusted when suboptimal conditions are detected for the application. The application is submitted to at least one resource node from among multiple resource nodes within a grid environment. Then, a service availability management agent monitors a performance status of the at least one resource node. The service availability management agent compares the performance status with an operational requirement specified for the platform of the at least one resource node in the application profile. If the performance status does not meet the operational requirement, then the service availability management agent adjusts the use by the application the resource nodes according to the application profile, such that the application continues to operate when suboptimal conditions arise in a grid environment.

Techniques are provided for reducing feedback while maintaining performance in a MIMO-OFDM system. The disclosed techniques employ finite-rate feedback methods that uses vector quantization compression. The disclosed methods / techniques generally involve: receiving a plurality of symbols from a plurality of sub-carriers at a receiver; selecting a plurality of indices of codewords corresponding to a codebook of pre-coding weighting matrices for the sub-carriers based on vector quantization compression of the codewords; and transmitting the selected indices over a wireless channel to a transmitter. Finite state vector quantization feedback makes use of a finite state vector quantizer (FSVQ), which is a recursive vector quantizer (VQ) with a finite number of states. In finite state vector quantization feedback, optimal precoding matrices (beamforming vectors) are selected sequentially across subcarriers. In a trellis-based feedback method, the optimal precoding matrices are selected at the same time for all subcarriers by searching for the optimum choice of matrices along a trellis using the Viterbi algorithm (dynamic programming).

Methods and apparatus provide a transceiver, such as a serializer / deserializer device (SerDes), with enhanced built-in self test (BIST). A built-in self test circuit is provided that decouples a clock signal used for receiving data from a clock signal used in transmitting data. This permits data tracking circuitry of a receiver to be efficiently tested with a relatively simple loop back test.

A system and method for converting static / still medical images of a particular patient into dynamic and interactive images interacting with medical tools including medical devices by coupling a model of tissue dynamics and tool characteristics to the patient specific imagery for simulating a medical procedure in an accurate and dynamic manner.

Systems and methods for data center control are provided. The data center includes a plurality of racks and at least one cooling unit. The racks including at least one server. Information regarding the at least one cooling unit, the at least one server, the plurality of racks, and at least one application is received. A rack based cooling metric threshold is also received. The systems and methods can determine a layout of the data center that minimizes total power consumption of the plurality of racks and the cooling unit while maintaining cooling performance at an acceptable level based on the threshold.

A polymer-dispersed liquid crystal based display is embedded inside a lightguide illuminator sheet which provides illumination of the display without the need for a backlight or frontlight. Light from one or more light sources is coupled into the lightguide sheet and is guided within a range of high angles of incidence within the sheet by total internal reflection. The guided light illuminating portions of the display which are in diffusing state is scattered such that some of the light is allowed to escape total internal reflection, providing visibility of the display. Guided light illuminating portions of the display which are in non-diffusing state remains guided within the lightguide illuminator sheet. Combining multiple lightguide embedded displays can be used to provide a three-dimensional display. When a low refractive index cladding is applied to the surfaces of the lightguide embedded display, the display is robust in a dirty environment, and / or can be laminated to adjacent lightguide embedded displays. The use of one or more coupled light sources, such as light emitting diodes, provides color by combining one or more colored light sources or by time-sequentially driving one or more colored light sources. The lightguide illuminator embedded display may further be used as a content dependent active backlight for an LCD display panel to provide improved dynamic contrast.

The invention provides a variety of tools and techniques for adding depth information to photographic images, and for editing and manipulating images that include depth information. The tools for working with such images include tools for “painting” in a depth channel, for using geometric primitives and other three-dimensional shapes to define depth in a two-dimensional image, and tools for “clone brushing” portions of an image with depth information while taking the depth information and lighting into account when copying from one portion of the image to another. The tools also include relighting tools that separate illumination information from texture information.

A stream data processing system capable of highly reliable and highly usable real time data processing, is provided with: (1) a mechanism of copying some or all of stream data, and archiving the stream data in a non-volatile memory to allow real time data and archive data to be used seamlessly; and (2) a mechanism of improving the performance of query processings by using a plurality of stream data processing systems cooperatively.

A cluster computer system including multiple network accessible computers that are each coupled to a network. The network accessible computers implement host computer programs which permits the network accessible computers to operate as host computers for client computers also connected to the network, such that input devices of the client computers can be used to generate inputs to the host computers, and such that image information generated by the host computers can be viewed by the client computers. The system also includes a cluster administration computer coupled to the multiple network accessible computers to monitor the operation of the network accessible computers. A method for providing access to host computers by client computers over a computer network includes receiving a request for a host computer coupled to a computer network from a client computer coupled to the computer network, wherein the relationship of the host computer to the client computer is to be such that after the client computer becomes associated with a host computer, an input device of the client computer can be used to generate inputs to the host computer, and such that image information generated by the host computer can be viewed by the client computer. Next, a suitable host computer for the client computer is determined, and the client computer is informed of the network address of the suitable host computer.

The invention discloses a page processing method and device of mobile applications, and in particular to a method and a device for updating client-side pages of the mobile applications and a page processing system of the mobile applications. The page processing method of the mobile applications mainly comprises the steps of analyzing pages returned by a server side and transforming the pages into objects which can be recognized by a client side; traversing each page component in the objects which can be recognized by the client side and generating examples of the page components according to types of the page components and a base component library of the client side; configuring the examples of the page components according to attributes of the page components; rendering the examples of the page components; returning all the rendered examples of the page components to the objects which can be recognized by the client side, generating and displaying local objects of the client side of the pages. By adopting the method provided by the invention, the mobile applications can have the advantages of low development cost like web applications and good user experience like native applications.

Provided are an LED module and a line type LED illumination lamp. The LED (light emitting diode) module including a plurality of LEDs emitting light of predetermined colors, includes: a substrate formed in the form of line that is long in length and relatively narrow in width, and including a first substrate and a second substrate electrically connected to each other and on which a plurality of LED bases for installation for the individual LEDs are formed; LED installation members attached to the LED bases and to which the LEDs are attached, respectively; and lenses respectively fixed to the LED installation members, the lenses manipulating the colors of the light emitted from the LEDs while transmitting the light.

In a front end structure of a vehicle, a heat exchanger is arranged at a position lower than a bumper reinforcement member, so a position of an engine hood is lowered. Electric auxiliary devices such as a radar, electronic control units for lights, and an air cleaner are arranged at a position higher than the bumper reinforcement member or at the rear of the bumper reinforcement member. By this arrangement, the electric auxiliary devices are arranged at a position which is less likely to be affected by the bumper reinforcement member in a case of light frontal crush.

In the electromagnetic switching device, it is possible to miniaturize and have low costs, have quiet operation noise, and also quickly extinguish the arc. The electromagnetic switching device has an electromagnetic actuator with a movable iron core, a pair of fixed terminals that respectively have a fixed contact point, a movable contact that has movable contact points on the right and left ends, a shaft, and an enclosing component that holds the movable contact points and the fixed contact points. The pair of movable contact points respectively contact with and detach from the pair of fixed contact points, and the pair of fixed contact points respectively conduct each other and are insulated again through the shaft by moving the movable iron core along the axis using the electric magnetic actuator. A quasi-hermetically sealed space, which is the extinguishing space, is formed by the enclosing component and a first yoke. A potting compound is charged, into the space between a body and the quasi hermitically sealed space.

A method is provided for fabricating a semiconductor device. A semiconductor substrate is provided. A first high-k dielectric layer is formed on the semiconductor substrate. A first treatment is performed on the high-k dielectric layer. In an embodiment, the treatment includes a UV radiation in the presence of O2 and / or O3. A second high-k dielectric layer is formed on the treated first high-k dielectric layer. A second treatment is performed on the second high-k dielectric layer. In an embodiment, the high-k dielectric layer forms a gate dielectric layer of a field effect transistor.

A door assembly that includes a single glass unit having at least first, second and third panels, a front surface, a rear surface, and an outside edge. At least one of the first, second or third panels is a transparent LCD panel on which media can be displayed. The single glass unit also includes a frame that at least partially surrounds the outside edge of the single glass unit, and electronic components in electrical communication with the LCD panel.

Distributed power generation systems are connected via the Internet to a managing apparatus in a managing company. The managing apparatus successively acquires and monitors the operation status of each distributed power generation system. The managing apparatus directly changes the control parameters or the sequence program of each distributed power generation system to perform necessary maintenance.

To provide a reference signal generation method and apparatus capable of obtaining many reference signal sequences having excellent properties. CAZAC sequences that satisfy the condition that the absolute value (|N−L|) of a difference between a sub-carrier number N in a resource block and a CAZAC sequence length L is not larger than a threshold value K are selected, and a sequence having a largest among greatest prime factors among the prime factors constituting the sequence length(s) is further selected from the initially selected sequences. Then, a reference signal sequence(s) is generated from a selected CAZAC sequence.

Methods, apparatus and computer program products are provided for distributing communication packets over multiple concurrent parallel links between a first node and a second node in a communication network based upon link quality information for the links. By utilizing link quality information from the links, the rate at which packets are provided to the links may be made proportional to the quality of the link, and thus, the link's ability to transmit the packet. The rate at which packets are provided to links may be reduced when error rates on a link exceed a specified threshold and eliminated when error rates exceed a higher threshold. Alternatively, timing delays from errors on a link may be used to determine a delay factor for a link and packets scheduled to the links based on the link with the lowest delay. The present invention is particularly useful in High Performance Routing Multilink Transmission Groups.

The present invention provides an Al—Zn—Mg—Cu casting alloy that provides high strength for automotive and aerospace applications and optimized stress corrosion cracking resistance in highly corrosive and tensile environments. The inventive alloy composition includes about 3.5 wt. % to about 5.5 wt. % Zn; about 1.0 wt. % to about 3.0 wt. % Mg; about 0.5 wt. % to about 1.2 wt. % Cu; less than about 1.0 wt. % Si; less than about 0.30 wt. % Mn; less than about 0.30 wt. % Fe; and a balance of Al and incidental impurities.

The present invention relates to a device and a method for transmitting a reference signal in a multi-antenna system. The present specification discloses a method for receiving a reference signal, the method comprising the steps of: receiving, from a base station, first channel state information (CSI) reference signal (CSI-RS) configuration information including individual parameters necessary when a terminal receives a first CSI-RS from a horizontally adjacent horizontal representative antenna among the all of the transmission antennas of the base station and second CSI-RS configuration information including individual parameters necessary when the terminal receives a second CSI-RS from a vertically adjacent vertical representative antenna; and receiving the respective first and second CSI-RSs from the base station on the basis of the first CSI-RS configuration information and the second CSI-RS configuration information.

A multi-band antenna device for a portable radio communication device has first and second radiating elements (10, 20). A controllable switch (30) is arranged between the radiating elements for selectively interconnecting and disconnecting thereof. The state of the switch is controlled by means of a control voltage input (VSwitch). A filter (40) that blocks radio frequency signals is arranged between the feeding portion and the control voltage input. A DC blocking arrangement (50) is arranged between a grounding portion (14) on the first radiating element and ground wherein the first and second radiating element are generally planar and arranged at a predetermined distance above a ground plane. By means of this arrangement, two broad and spaced apart frequency bands are obtained with retained performance and small overall size of the antenna device. A communication device comprising such an antenna device is also provided.