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30results about How to "Optimized coefficient" patented technology

Concrete with a Low Cement Content

A subject of the invention is a mixture comprising in proportions by mass:from 0.4 to 4%, preferably from 0.8 to 1.7%, of materials in the ultrafine particle size range, constituted by particles with a D90 smaller than 1 μm and / or with a specific BET surface area greater than 6 m2 / g;from 1 to 6%, preferably from 2 to 5%, of Portland cement;from 8 to 25%, preferably from 12 to 21%, of materials in the fine particle size range, constituted by particles the D10 and the D90 of which are comprised between 1 μm and 100 μm and with a specific BET surface area of less than 5 m2 / g, different from the cement;from 25 to 50%, preferably from 30 to 42%, of materials in the medium particle size range, constituted by particles the D10 and the D90 of which are comprised between 100 μm and 5 mm; andfrom 25 to 55%, preferably from 35 to 47%, of materials in the larger particle size range, constituted by particles the D10 of which is greater than 5 mm.The invention also relates in particular to premixes, concrete compositions and associated objects made of hardened concrete, as well as their preparation methods.
Owner:SA CIMENTS LAFARGE

Electronic device with digital reverberator and method

Electronic devices having digital reverberators are disclosed, together with a method of reproducing sound for a user with the digital reverberator. The digital reverberator uses digital surface absorption filters positioned in the reverberator to simulate absorption of energy as digital audio data samples are reflected from virtual surfaces. The position of the digital surface absorption filters enables known frequency-dependent surface absorption characteristics of real materials to be directly implemented using the filter coefficients of each digital surface absorption filter. This enables virtual acoustic spaces to be designed quickly without the need for the digital reverberator to be manually tuned for each space.
Owner:DE SENA ENZO +2

Optimizing the efficiency and energy usage of a geothermal multiple heat pump system

A system and a method for operating the system is provided to optimize heat exchange between a geothermal loop and a heat pump load loop for heating and cooling a structure. In the method, the flow rate through the earth loop is adjusted based on current thermal demand of a heat pump array, so as to reduce the electrical demand of the earth loop circulator when thermal demand from the heat pump loop is low. The method adjusts the speed of the earthloop circulator as required for the operating conditions of the heat pumps and earth loop, thereby permitting efficient laminar flow whenever possible, as long as thermal demand is met.The system of this invention provides a compact module containing a suitable digital data receiver and controller programmed to receive temperature and flow data and to calculate the needed flow in each loop to meet the thermal demand of the heat pump or pumps, and to signal the earthloop pump, and optionally a load loop pump, to operate at the necessary flow speed. Specifically, if flow in the earth loop transitions from turbulent to laminar, this method insures that the current thermal demand of the heat pumps is met, and if not, increasing the earth loop circulator speed to deliver the current thermal demand of the heat pumps.
Owner:SIEGENTHALER JOHN

Power feeding device and contactless power feeding system provided with power feeding device

A power feeding device utilizing an electromagnetic resonance coupling method and a contactless power feeding system can be provided. A coupling coefficient of electromagnetic induction coupling in the power feeding device and / or the inside of a power receiving device is optimized to improve electric power transmission efficiency of a resonance frequency regardless of positions of the power feeding device and the power receiving device. Provided is a power feeding device or a contactless power feeding system in which an S11 parameter which is a reflection component of electric power output from a high-frequency power source of the power feeding device is monitored, and one or both of positions of a transmission coil and a first resonant coil in the power feeding device and positions of a reception coil and a second resonant coil in a power receiving device are changed to adjust a coupling coefficient of electromagnetic induction coupling.
Owner:SEMICON ENERGY LAB CO LTD

Flexible metal laminate containing fluoropolymer

The present invention relates to a flexible metal laminate with low dielectric constant, which may be applied for a substrate for a flexible printed circuit. A flexible metal laminate according to one aspect of the invention includes a first metal layer; a first polyimide layer; a polyimide layer including fluoropolymer dispersed therein, formed on the first polyimide layer; and a second polyimide layer formed on the polyimide layer including fluoropolymer dispersed therein; wherein in the polyimider layer including dispersed fluoropolymer, the content of the fluoropolymer per unit volume is higher at 40 to 60% depth than at 5 to 10% depth of the total thickness from the surface of the polyimide layer.
Owner:GUANGDONG SHENGYI SCI TECH

Aromatic hydrocarbon based proton exchange membrane and direct methanol fuel cell using same

A proton exchange membrane is obtained which can give an excellent power generation characteristic when the membrane is applied to, in particular, a fuel cell wherein high-concentration methanol is used as a fuel. In the aromatic hydrocarbon based proton exchange membrane of the invention, the ion exchange capacity is set into the range of 0.6 to 1.3 meq / g. Moreover, the area swelling rate for a 30% by mass methanol aqueous solution at 40° C. is set into the range of 2 to 30%. Preferably, a sulfonic acid group is bonded to an aromatic ring of the aromatic hydrocarbon based polymer contained in the aromatic hydrocarbon based proton exchange film. Preferably, the aromatic hydrocarbon based polymer is a polyarylene ether based polymer.
Owner:TOYOBO CO LTD

Multi-layer flexible printed circuit board, and method for fabricating it

To provide an interlayer-connected, multi-layer flexible printed circuit board having high bonding reliability and most suitable for micropatterning the circuit layers in the device; and to provide a high-productivity method for fabricating the device. A multi-layer flexible printed circuit board, wherein a conductor is filled in the through-holes formed in the insulating layer in the direction of the thickness thereof so as to electrically interconnect the circuit layers formed on both faces of the insulating layer, and wherein the conductor contains inside it, a copper-core solder ball having a copper ball as a core thereof.
Owner:PANASONIC CORP

Echo canceller with correlation using pre-whitened data values received by downlink codec

Duplex audio communications over a network use compressed audio data, with linear prediction coefficients (LPCs) and variances by which sample values differ from predictions. A adaptive echo canceller for a transceiver develops finite impulse response filter (FIR) coefficients characterizing an echo path between its local audio output and audio input. The received / decompressed audio data is applied to the FIR coefficients, and the predicted echo is subtracted from the uplink signal. Echo is detected as cross-correlation of the receive signal versus the uplink / send signal over time. In one embodiment, the cross-correlation is determined using a pre-whitened receive signal, obtained by adopting the variance values received over the network by the downlink Codec. Apart from the uplink Codec, no speech analysis filter or process is needed. The technique is apt for GSM, AMR and similar compressed audio communications.
Owner:AVAGO TECH INT SALES PTE LTD

Blind wavelet-based watermarking method

A blind wavelet-based watermarking method is provided to extract one or more embedded watermarks form one or more high subbands of a watermarked image generated by 1-level or 2 level wavelet transform. One or more least-mean-square (LMS) filters are trained to predict the data sets in the high subbands of an original image by converting a low subband of the watermarked image. Therefore, the one or more embedded watermarks could be extracted by comparing the predicted data sets in the high subbands with data sets in corresponding subbands of the watermarked image.
Owner:NAT TAIWAN UNIV OF SCI & TECH

Multi-layer printed circuit board, and method for fabricating the same

To provide an interlayer-connected, multi-layer flexible printed circuit board having high bonding reliability and most suitable for micropatterning the circuit layers in the device; and to provide a high-productivity method for fabricating the device.A multi-layer flexible printed circuit board, wherein a conductor is filled in the through-holes formed in the insulating layer in the direction of the thickness thereof so as to electrically interconnect the circuit layers formed on both faces of the insulating layer, and wherein the conductor contains inside it, a copper-core solder ball having a copper ball as a core thereof.
Owner:PANASONIC CORP

Nozzle having a variable neck section for a spacecraft thruster provided with a mobile needle

A nozzle of variable throat section for an aerospace vehicle thruster, the nozzle including a cylindrical housing presenting a throat of aperture diameter less than the diameter of the housing, and a needle suitable for sliding inside the housing between a high discharge rate front position in which the nose is set back from the throat of the housing, and a low discharge rate rear position in which the nose is in abutment against the throat, the needle including a rod for sliding inside the housing of the nozzle, the rod terminating in a nose of decreasing diameter. The nose of the rod is suitable for coming into abutment against the throat of the nozzle housing forming a seat and includes at least two axial grooves formed in its outer periphery to allow gas to pass when the nose is axially in abutment against the throat of the housing of the nozzle.
Owner:ARIANEGRP SAS

Disk drive

Embodiments in accordance with the present invention provide a magnetic disk drive capable of achieving error recovery stably in a simple configuration in the event of thermal asperity (TA) and minimizing the error recovery time required, and a method for controlling the disk drive. According to one embodiment, if TA occurs, a cutoff frequency of a high-pass filter to which a data read signal is input is first increased and a loop gain of a low-order finite impulse response (FIR) filter connected in series to an FIR filter is also increased as high as possible. Next, a Viterbi decoder to which a signal is input from the low-order FIR filter provides feedback to the low-order FIR filter so that an input signal error becomes a minimum. Tap coefficients of the low-order FIR filter are thus optimized.
Owner:WESTERN DIGITAL TECH INC

Training method for recording medium reproduction equalizer and recording medium reproduction apparatus

In a training operation for optimizing a multiplication coefficient for each tap of an FIR equalizer equalizing a read signal read from a recording medium, as a restricted coefficient updating vector applied for updating the multiplication coefficient for each tap of the FIR filter, a vector is utilized which is obtained by projecting, onto a plane perpendicular to a predetermined restricting conditional vector, a coefficient updating vector determined based on an equalizer error between the output of the FIR equalizer and a reproduction output determined therefrom and a delayed input value for each tap of the FIR equalizer. As the restricting conditional vector, a vector is utilized which is a difference between a subsequent coefficient vector obtained in the same condition immediately subsequent to and an antecedent coefficient vector obtained in the same condition immediately antecedent to a reference coefficient comprising the multiplication coefficient for the equalizer obtained upon calculating the equalizer error.
Owner:FUJITSU LTD

Updating apparatus and method for equalizer coefficient, receiver and otpical communication system

The present invention provides an updating apparatus and method for an equalizer coefficient, receiver and optical communication system. The updating method comprises: receiving an optical signal transmitted by a transmitter in an optical communication system, the optical signal comprising transmission data and a constant modulus signal for updating a coefficient of an equalization filter; performing coherent detection and analog-to-digital conversion on the optical signal, so as to obtain a digital electric signal; and updating the coefficient of the equalization filter at a symbol corresponding to the constant modulus signal in the digital electric signal. With the embodiments of the present invention, not only the coefficients of the equalizer may be optimized, but also being adapted to signals in various modulation formats, and the complexity of the channel equalization may be lowered as well.
Owner:FUJITSU LTD

Flexible metal laminate

Disclosed herein is a flexible metal laminate including: a first thermosetting polyimide resin layer containing 5 wt % to 75 wt % of a fluorine-based resin; a second thermosetting polyimide resin layer formed on at least one surface of the first thermosetting polyimide resin layer, and containing 1 wt % or less of the fluorine-based resin; and a thermoplastic polyimide resin layer formed on one surface of the second thermosetting polyimide resin layer so as to face the first thermosetting polyimide resin layer, wherein the first thermosetting polyimide resin layer and the second thermosetting polyimide resin layer include the same thermosetting polyimide resin.
Owner:GUANGDONG SHENGYI SCI TECH

Flexible metal laminate

There is provided a flexible metal laminate including a polymer resin layer including a polyimide resin of a specific structure and a fluororesin, wherein the fluororesin is more distributed through the inside of the polymer resin layer than at the surface of the polymer resin layer.
Owner:GUANGDONG SHENGYI SCI TECH

Heuristic occupancy and non-occupancy detection in a lighting system with a single transmitter and multiple receivers

Disclosed herein is a lighting system configured to obtain an indicator data of a RF spectrum signal generated at a number of times in an area. At each respective one of the number of times, apply one of a plurality of heurist algorithm coefficients to each indicator data from each of the plurality of receivers for the respective time, based on results of the applications of the coefficients to indicator data, generate an indicator data metric value for each of the indicator data for the respective time, and process the indicator data metric values to compute an output value. The lighting system is further configured to compare the output value at each of the plurality of times with a threshold to detect one of an occupancy condition or a non-occupancy condition in the area and control the light source in response to the detected one of the occupancy condition or the non-occupancy condition in the area at each of the number of times.
Owner:ABL IP HLDG

Device for modulating a gas ejection section

A modulator device for modulating a gas ejection section, includes a shutter member for partially shutting a nozzle throat, a control guide of the shutter member, a main piston, and a primer piston. The control guide is movable between a retraction position for retracting the partial shutter element relative to the nozzle throat and a shutting position in which the partial shutter element is in contact with the nozzle throat. The primer piston is movable between a rest position and a priming position for priming the main piston when the pressure in the modulator device reaches a first predetermined value. The main piston is movable between a first position for locking the control guide against movement in its retraction position, and a second position for locking the control guide when the pressure in the modulator device reaches a second predetermined value less than the first predetermined value.
Owner:ARIANEGRP SAS

Optimizing the efficiency and energy usage of a geothermal multiple heat pump system

A system and a method for operating the system is provided to optimize heat exchange between a geothermal loop and a heat pump load loop for heating and cooling a structure. In the method, the flow rate through the earth loop is adjusted based on current thermal demand of a heat pump array, so as to reduce the electrical demand of the earth loop circulator when thermal demand from the heat pump loop is low. The method adjusts the speed of the earthloop circulator as required for the operating conditions of the heat pumps and earth loop, thereby permitting efficient laminar flow whenever possible, as long as thermal demand is met.The system of this invention provides a compact module containing a suitable digital data receiver and controller programmed to receive temperature and flow data and to calculate the needed flow in each loop to meet the thermal demand of the heat pump or pumps, and to signal the earthloop pump, and optionally a load loop pump, to operate at the necessary flow speed. Specifically, if flow in the earth loop transitions from turbulent to laminar, this method insures that the current thermal demand of the heat pumps is met, and if not, increasing the earth loop circulator speed to deliver the current thermal demand of the heat pumps.
Owner:SIEGENTHALER JOHN

Nozzle having a variable neck section for a spacecraft thruster provided with a mobile needle

A nozzle of variable throat section for an aerospace vehicle thruster, the nozzle including a cylindrical housing presenting a throat of aperture diameter less than the diameter of the housing, and a needle suitable for sliding inside the housing between a high discharge rate front position in which the nose is set back from the throat of the housing, and a low discharge rate rear position in which the nose is in abutment against the throat, the needle including a rod for sliding inside the housing of the nozzle, the rod terminating in a nose of decreasing diameter. The nose of the rod is suitable for coming into abutment against the throat of the nozzle housing forming a seat and includes at least two axial grooves formed in its outer periphery to allow gas to pass when the nose is axially in abutment against the throat of the housing of the nozzle.
Owner:ARIANEGRP SAS
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