31results about How to "Small error" patented technology

Data errors in non-volatile memory inevitably increase with usage and with higher density of bits stored per cell. The memory is configured to have a first portion operating with less error but of lower density storage, and a second portion operating with a higher density but less robust storage. An error management provides reading and checking the copy after copying to the second portion. If the copy has excessive error bits, it is repeated in a different location either in the second or first portion. The reading and checking of the copy is accelerated by reading only a sample of it. The sample is selected from a subset of the copy having its own ECC and estimated to represent a worst error rate among the copy it is sampling. One embodiment has the sample taken from one bit of each multi-bit memory cell of a group.

An analog-to-digital converter (ADC) having a two-channel or multi-channel structure processes background timing calibration. Signals from the ADC are directly compared for the calibration. Additional signal or interruption of circuit is not required. A dynamic calibration is processed. A timing-skew error is kept in a low level and a process mismatch is not a concern. Moreover, sampling frequency and input signal frequency are improved. A high sampling frequency and a high speed of signal inputting are achieved; and chip area can be greatly shrunk because the extra calibration circuits are simple digital circuits.

A method for correcting optical proximity effect of a mask pattern for exposure light, the mask pattern including a rectangular pattern formed by a transparent region having a dimension of limiting resolution of exposure light, includes (a) performing exposure by means of an evaluating mask on which an evaluation pattern including the rectangular pattern is arranged so as to form a pattern on a wafer. Further, the method includes (b) calculating an error between a simulation value obtained by a simulation of exposure, the simulation using the evaluation pattern and a dimension value of the pattern formed on the wafer, and (c) optimizing a simulation parameter so that the error becomes small. The simulation parameter includes at least a first bias value and a second value, the first bias value corrects a corner portion of the rectangular pattern, and the second bias value corrects a side portion of the rectangular pattern.

The invention relates to a multi-source data-based urban land space information identification method which comprises the following steps of: firstly, constructing a resident settlement index through night light and a vegetation index; meanwhile, interpreting urban land information by using high-resolution satellite remote sensing images in partial regions to obtain accurate settlement percentage data; based on the two sets of data, establishing a regression model of the resident settlement index and the settlement percentage data, inverting settlement percentage data in all regions by using easily available resident settlement indexes and obtaining settlement data according to the settlement percentage data and the night light; finally, processing the settlement data on the bases of standard urban land area statistical data. According to the multi-source data-based urban land space information identification method, rapid calculation is carried out by using the easily-available low-resolution data such as the night light and the vegetation index and the error between the identified urban land area and the standard urban land area statistical data is very little, thus space information of urban land can be rapidly and accurately obtained.

For each color channel, the process includes gathering Bayer pattern pixel values by pairs, each pair being composed by two successive pixels belonging to the channel along the scanning direction of the pixels of the image, thus each pair of values representing a current input vector, and calculating a predictor vector of the input vector in terms of the differences between the values defining the input vector and a pair of prediction values generated according to a certain criterion, for representing a prediction error. The process further includes quantizing each so calculated predictor vector according to a heavier or lighter degree of quantization depending on whether the predictor vector is representative of an area of relatively uniform color of the image or of an area of relatively abrupt changes of colors of the image, and generating a multibit code representative of the quantized predictor vector of the input vector according to a certain compression ratio.

The invention relates to a camshaft adjuster (1) for adjusting and fixing the relative position of the angle of rotation of a camshaft (8) in relation to the crankshaft of a reciprocating piston internal combustion engine. Said adjusting device comprises a high transmission and friction-reduced adjusting gear mechanism (2), comprising a drive shaft which is rotationally fixed to the crankshaft, a driven shaft which is rotationally fixed to a camshaft (8) and an adjusting shaft (9) which is connected to an adjusting motor shaft (10) of an adjusting motor. A camshaft adjuster (1), which is economical to run, can be produced such that the adjusting gear mechanism (2) and the adjusting motor (3) are embodied as separate units and are connected together by a rotational backlash-free, disengaging clutch (4).

A PLL includes an open-loop automatic frequency calibration circuit. The open-loop automatic frequency calibration circuit includes a frequency detector, first and second sinks, a comparator and a bank selector. The frequency detector generates an up-signal and a down-signal responding to a frequency difference between a first phase difference signal having a phase difference from a reference oscillation signal and the second phase difference signal having a phase difference from a frequency division oscillation signal. The first and second sinks discharge the first and second capacitors respectively responding to the up-signal and the down-signal. The comparator compares voltages of the first and second capacitors. The bank selector selects a bank according to binary search, selects an optimum bank among two banks lastly searched, and outputs a bank selection signal. The voltage-controlled oscillation changes frequency features thereof in response to the bank selection signal.

A current summing type D/A converter having a configuration of two or more steps is provided. In a D/A converter block of the first step, by adding current segments, upper bits are D/A converted, and one of the current segments in the first step is further supplied to a D/A converter block in a second step to be shunt by the D/A converter block in the second step, so that lower bits are D/A converted. The output current in the first step and the output current in the second step are then added each other. According to the foregoing method, the D/A conversion may be performed without causing a differential linearity error.

Reception beamforming that does not generate discontinuity in the vicinity of the depth of a transmit focus is executed even if reception scanning lines are disposed outside of the irradiation area of a focusing-type transmission beam. The degree of discontinuity showing the discontinuity of reception signals detected by plural ultrasound elements 105 or the degree of discontinuity regarding the discontinuity of the wave fronts of phased signals is detected by a discontinuity extracting unit 113. If there is an area where the degree of discontinuity is larger than a predefined value, a delay time generating unit 114 for discontinuity elimination changes the delay times in the area where the discontinuity is generated.

A method of outputting an input position of a touch panel is provided which can output an input position intended by an operator even if two or more different input positions are detected. When an input operation on a position different from a first input position is detected in a scan cycle after output of the first input position, the input position where the new input operation is detected is output as a second input position. Even if input operations on two or more different positions are simultaneously detected, only one input position is output.

The invention discloses a conveniently overhauled crane carriage for a crane. A movable maintenance platform is arranged on the crane carriage. A crane carriage frame comprises two walking beams and a bearing beam which are arranged in an I shape. The two ends of each winding drum are arranged on two winding drum fixing bases respectively. A dedicated monitoring device comprises an installing frame composed of two fixed segments and a horizontal segment. A driving chain wheel, a driven chain wheel and a chain are arranged in the horizontal segment, a horizontal mobile platform is fixed to the chain, and a rotary mobile platform is rotationally connected to the horizontal mobile platform. According to the conveniently overhauled crane carriage for the crane, the crane carriage can be produced through a modularized assembling mode and has the advantages of being simple in structure, few in welding point and light in self weight, welding portions can be decreased effectively at the same time, and the situation that the errors of crane carriage wheel lines are too large due to welding deformation is avoided; in addition, whether the surface of a main beam has deformation or cracks or the working conditions of driving wheels and driven wheels can be monitored in real time through a camera, and meanwhile the overhauling efficiency is improved.

A concentration of a fuel supplied to a fuel cell and a heat exchange rate of a heat exchanger are controlled simultaneously in order to maintain a temperature of fuel cell stack and a diluted fuel concentration that is supplied to the fuel cell stack in a target level. Further, by appropriately responding to an exterior temperature changes or unexpected fuel cell performance changes, it is possible to improve a system efficiency and stability of fuel cell operation and to regulate the fuel concentration quickly and accurately compared to a prior sensor-less concentration controller.

A plunger pump power control device and a control method thereof. The device comprises a valve body, a valve core, a valve sleeve, a stop plug, a spring pre-loaded mechanism, a feedback mechanism and a slide valve. The slide valve is provided within one end of the valve core. The stop plug is provided at one end of the valve body, and the spring pre-loaded mechanism is provided at the other end of. The valve sleeve, the valve core, and the slide valve are provided between the stop plug and the spring pre-loaded mechanism, and the feedback mechanism is hinged on the valve body. The device enables the hydraulic plunger pump to control the output power, the pump power output is simulated by two broken lines, and the error is less. It is flexible to load variable by the valve core through the pressure of the C-cavity.

A method for conducting optical measurement using a full Mueller matrix ellipsometer, which belongs to the technical field of optical measurements. The optical measurement method comprises: constructing an experimental optical path of a full Mueller matrix ellipsometer; conducting complete regression calibration on the full Mueller matrix ellipsometer; placing a sample to be measured on a sample platform, and obtaining an experimental Fourier coefficient of the sample to be measured; and according to the experimental Fourier coefficient of the sample to be measured, obtaining information about the sample to be measured. Since a calibration method for the full Mueller matrix ellipsometer is not only simple in operation process, but also makes full use of data of the full Mueller matrix ellipsometer measured at the same time, the introduced error is relatively small and the parameter obtained by calibration is more accurate, so that the measurement result is more accurate when the sample to be measured is measured. Thus, the process of the optical measurement method is simplified.

A device for scaling and quantization of digital soft output values (s_k) from an equalizer has a control loop for controlling a statistical parameter (θ) for the scaled and quantized soft output values (s_D,k), which contains a calculation unit (4) for calculation of the statistical parameter (θ), and a control unit (5) for calculation of a scaling factor (c) for scaling the soft output values (s_k) from the equalizer on the basis of the statistical parameter (θ).

An adaptive array antenna apparatus for performing adaptive control based on received signals received by a plurality of antenna elements which form an array antenna. The apparatus includes a computation part for computing an error of the received signals at different timings; an error comparison part for comparing the errors at the different timings with each other; and a weighting synthesizing part for performing weighting synthesis based on results of the comparison. Based on the results of the comparison, the computation part releases at least a part of computation resources required for the computation of the errors, and terminates the computation of the errors. Typically, the computation part performs the release of the computation resources when it is determined that the error has a minimum value, and terminates the computation of the errors.

The invention relates to a gas cutting series combined tool, which comprises a linear cutting device, a circular arc cutting device and a beveling cutting device, wherein a longitudinal trolley of the linear cutting device consists of a front slide block and a back slide block; the front slide block and the back slide block are symmetrically welded and fixed on the two ends of the lower side of the longitudinal center of an operation platform, and is arranged on a rail; weight balancing plates are symmetrically welded at the left side and the right side of the operation platform; balancing rolling wheels are arranged under the weight balancing plates through a support wheel and wheel shafts; the bottoms of the two balancing rolling wheels are in contact with a workpiece steel plate on the same horizontal plane; a left group of upright posts and a right group of upright posts used for positioning and fixing transverse cutting torches are arranged in the transverse center position on the operation platform; clamping screws and elastic clamp sheets used for fixing the transverse cutting torches are arranged on the upright posts; the rail is tightly clamped on the surface of the workpiece steel plate through magnetic blocks; a moving support frame and a supporting support frame are arranged at one side of the operating platform; the two sides of one end of the moving support frame are rotatably connected with the operation platform through pin shafts; the beveling cutting device is fixed on the operation platform of the linear cutting device.

The invention provides a high-conductivity writing type conductive gel pen ink. The high-conductivity writing type conductive gel pen ink is composed of the following components by mass: 1 to 2 partsof formamide, 1 to 2 parts of ethanolamine, 4 to 16 parts of acrylic resin, 1 to 7 parts of conductive carbon black, 3 to 10 parts of graphite, 1 to 10 parts of a dispersant, 10 to 60 parts of water,1 to 3 parts of an antifoaming agent, 0.1 to 0.8 part of xanthan gum, 10 to 20 parts of propylene glycol methyl ether and 10 to 50 parts of carbon nanotube with a solid content of 5 parts. The high-conductivity writing type conductive gel pen ink provided by the invention has the advantages of low cost, strong adhesion force, excellent electrical conductivity, rapid forming at a normal temperature, smoothness in writing, insusceptibility to pen plugging and easy storage trough organic combination of the above-mentioned components, is specifically applicable to application in writing by being perfused into a conventional gel pen, and meets the increasing demands of the market.

Techniques are described for error-modulated pixel readout by column-parallel programmable gain amplifiers (PGAs) in a digital image sensor. Each PGA has an amplifier with gain set by a ratio of input and feedback capacitors. Mismatch between these capacitors can manifest as vertical fixed pattern noise (FPN) in the image output. Embodiments use a swap control signal to pseudo-randomly toggle between two or more swap states for each of a sequence of row scan times. Each swap state at least directs coupling of a particular capacitor network in either the input or the feedback path of the amplifier. Pseudo-randomly swapping those couplings of the capacitive networks also pseudo-randomly modulates gain error from capacitive mismatch between the capacitor networks. The FPN effectively becomes spatially modulated noise at a level far below what would be considered as a visible artifact in the image output.

The invention provides a writing type conductive gel pen ink. The writing type conductive gel pen ink is composed of the following components by mass: 1 to 2 parts of formamide, 1 to 2 parts of ethanolamine, 4 to 16 parts of acrylic resin, 1 to 7 parts of conductive carbon black, 3 to 10 parts of graphite, 1 to 10 parts of a dispersant, 30 to 70 parts of water, 1 to 3 parts of an antifoaming agent, 0.1 to 0.8 part of xanthan gum and 10 to 20 parts of propylene glycol methyl ether. The writing type conductive gel pen ink provided by the invention has the advantages of low cost, strong adhesionforce, excellent electrical conductivity, rapid forming at a normal temperature, smoothness in writing, insusceptibility to pen plugging and easy storage trough organic combination of the above-mentioned components, is specifically applicable to application in writing by being perfused into a conventional gel pen, and meets the increasing demands of the market.

A lens module includes a first wafer level lens group, a second wafer level lens group, a first sensor, and a second sensor. The first wafer level lens group has a first optical axis. The second wafer level lens group has a second optical axis. The first optical axis is parallel with the second optical axis, and the first wafer level lens group and the second wafer level lens group are integrally formed. The first sensor is disposed corresponding to the first wafer level lens group, and the first sensor is disposed on the first optical axis. The second sensor is disposed corresponding to the second wafer level lens group, and the second sensor is disposed on the second optical axis.