40 results about "Absolute accuracy" patented technology

A system for collecting, storing and displaying dermatological images for the purpose of monitoring and diagnosis of skin conditions and skin cancers, including melanoma. A hand-held unit illuminates a section of the patient's skin, and an imaging device generates imaging signals from light derived from a skin section. Pairs of light output ports in the hand-held unit are arranged such that their intensity distributions overlap at their half-intensity levels so that the resulting summation of their intensities has a flat central region. Three image stores are maintained, one for lesion images, one for “nearby skin” images, and one for reference-white images. The “nearby skin” images are used by the system software to automatically determine the skin/lesion border. The reference white images are used to set the dynamic range of the instrument and to compensate for lighting irregularities. Two images of the same lesion taken at different times may be displayed simultaneously so that changes in the lesion may be determined. The calibration system is designed so that image data taken on any of multiple machines built to the same specification will be corrected back to a common reference standard to ensure absolute accuracy in colour rendition.

The present invention includes novel techniques, apparatus, and systems for optical WDM communications. Various wavelocker apparatus and methods are disclosed that measure the frequency offsets between signal lasers and reference lasers. The measured offsets are used to adjust the signal laser frequencies to meet their target frequencies. The absolute accuracy of the reference laser frequency is improved by measuring the absorption of the reference laser by a gas cell with known fixed absorption lines versus the reference laser frequency. Apparatus and methods are disclosed to cover scenarios in which the reference laser polarization is aligned with the signal lasers, as well as those in which the reference laser polarization is not aligned with the signal lasers. The wavelocker apparatus may or may not be located at the same network site as the signal lasers.

A “Media Transmission Optimizer” provides a media transmission optimization framework for lossy or bursty networks such as the Internet. This optimization framework provides a novel form of dynamic Forward Error Correction (FEC) that focuses on the perceived quality of a recovered media signal rather than on the absolute accuracy of the recovered media signal. In general, the Media Transmission Optimizer provides an encoder that optimizes the transmission of redundant frames of electronic media information encoded at different bit rates, and provides optimized playback quality by providing a decoder that automatically selects an optimal path through one or more available representations of each frame as a function of overall rate/distortion criteria.

A highly sensitive method that utilizes a Paper Analytical Device (PAD) which measures part per million (ppm) levels of iodate iodometric titration is provided. The PAD quantifies concentrations of 0.6-15 parts per million (ppm) of iodine. The PAD has at least 12 reaction zones that contain dried reagents thereon and at least one electronically readable information zone. Salt and water are mixed and drops are placed onto 12 reaction zones that contain the loaded dry reagents. The PAD is shaken and the reaction zones turn blue if a preset iodate concentration has been exceeded. Test results are analyzed by comparing the PAD or an image of the PAD with standards, either by eye or with image analysis software to measure the color intensities which are compared to a calibration curve to quantify the iodate levels. The image analysis quantifies iodine with an average absolute accuracy and precision of 0.9 ppm over a range of 0.6-15 ppm.

The synchronous clock preprocessing and detecting unit detects rising edge of initial synchronization signal (SS), and filters out burrs. When rising edge is detected, local crystal oscillation clock starts counting, and till next rising edge of next SS so as to obtain a value of counter. Based on the value of counter, synchronization control unit carries out analysis, judgment and process. The synchronous clock output unit outputs SS. Being applicable to sync CDMA system; the invention can detect SS precisely. Precision of SS is not affected by absolute accuracy of crystal oscillation. In procedure of losing and recovering synchronization, switching procedure is not needed so that switching dithering will not produce.

An absolute accuracy in the range from ±2 nm to ±1 nm for a displacement measurement value is provided by a laser interferometer displacement measuring system. A fluctuating error component that appears corresponding to the wave cycle of laser light is detected and subtracted from the measurement value while a stage is moving, thereby providing a high accuracy.

The invention discloses a cooling and setting device for producing stone paper wallpaper base material. The cooling and setting device consists of a vacuum setting device and two cooling devices, wherein the two cooling devices are two closed annular water or oil jackets; the vacuum setting device is an annular closed chamber; the two closed annular water or oil jackets are respectively connected with two ends of the annular closed chamber to form an overall structure; the annular water or oil jackets are provided with multiple water/oil inlets or water/oil outlets which are uniformly distributed; a joint connected with a vacuum machine is formed in the annular closed chamber; and small holes or linear grooves which are regularly distributed are formed in an inner side wall of the annular closed chamber and are communicated with the annular closed chamber. According to the device, high-temperature parisons extruded from a film blowing machine head have fixed geometrical shapes and sizes, and the stone paper wallpaper base material which accords with related size and quality standard is obtained. The defect that the base material is large in width fluctuation during air cooling of a traditional blowing process is overcome, the absolute accuracy of the size of the stone paper wallpaper base material is guaranteed, the smoothness is greatly improved, and the quality and yield of the product are improved.

A cluster-based fault critical clearing time parallel computing method distributes computing cores according to search interval lengths of faults and ensures the faults with great search intervals to receive more cores. If the tap position split step size of the fault is less than the computing accuracy, the number of cores required by the fault is determined according to the computing accuracy demand. When the absolute accuracy is adopted, if the tap position split step size meets the convergence accuracy, longer observation time is adopted to directly obtain the transient state security CCT and dynamic security CCT through once iteration; else, shorter observation time is adopted to obtain transient security CCT and set the transient security CCT as the upper limit, and then the longer observation time is utilized to obtain the dynamic security CCT. When the relative accuracy is adopted, the transient security CCT is firstly obtained and the dynamic security CCT is subsequently obtained. When the security stability indexes of various power systems are taken into consideration, the minimum one of the angle stability CCT, the voltage security CCT, frequency security CCT and dynamic security CCT is obtained.

A semiconductor integrated circuit is characterized in that it comprises analog macros each having a comb capacitor (10), each comb capacitor (10) is composed of comb-shaped electrodes (11, 12), the comb tooth portions (13) of the electrode (11) and the comb tooth portions (14) of the electrode (12) are so interdigitized that the comb tooth portions (13) and the comb tooth portions (14) are alternated and parallel to one another, and the tooth portion intervals (S) are varied according to the absolute accuracy indicating the difference between the actual capacitance and the ideal capacitance or the relative accuracy indicating the differencebetween the capacitances of the adjacent comb capacitors. A high-accuracy analog macro comprising a comb capacitor whose high capacitance accuracy is ensured and a semiconductor integrated circuit comprising highly-integrated analog macros are provided.

The invention discloses a moon control network establishment method, comprising the steps of: step 1, obtaining image data of the lunar surface and corresponding ephemeris data and attitude data; step 2, extracting corresponding image points from image data from different viewing angles of a same orbit and image data of adjacent orbits by using an automatic image matching technology; step 3, by employing the data and the corresponding image points, performing adjustment processing for a survey area to form the ground stereo model of the whole survey area; step 4, performing adjustment processing for the whole moon after the adjustment processing is performed for survey areas; step 5, laying control points on the whole moon according to an established regular grid, then, calculating the selenographic coordinates of the control points according to parameters of the adjustment of the survey areas and the adjustment of the whole moon. The establishment method for the moon control network focuses on specific requirements for 1: 2,500,000 or larger scale lunar mapping, solving the problems of scale change and absolute orientation of the control network and improving the absolute accuracy of the control network.

The invention discloses a feed automatic overturning mechanism of remote controller detection equipment. The feed automatic overturning mechanism comprises a support installed on a bottom plate, and arotary shaft is rotationally connected to the support. A first station capable of bearing a workpiece is arranged on one side of the rotary shaft. A second station used for bearing the workpiece is further fixedly connected to the rotary shaft. A driving mechanism driving the rotary shaft to rotate is connected to the rotary shaft. The driving mechanism drives the second station on the rotary shaft to rotate to be above the first station. The workpiece on the first station is picked up and transferred onto the second station and is then overturned. A vacuum sucker is used, locating guiding isadded, thus a remote controller can be sucked stably during equipment overturning, absolute accuracy of locating is ensured while overturning is conducted, stable reliability of the equipment is relatively enhanced, and reliability and precision of the feed automatic overturning mechanism can be ensured through the whole structural design.

The invention relates to a mechanical structure of a novel high-speed rail track measuring instrument. The mechanical structure mainly comprises a transverse beam, a longitudinal beam, a high-low optical fiber gyroscope mechanism, a displacement sensor, a tilt angle sensor mechanism, a connecting block, a supporting frame, a display screen, a controller, a connecting wire, travelling wheels, handles, a battery case, an encoder and a track-direction optical fiber gyroscope mechanism. The whole mechanism comprises the transverse beam, the longitudinal beam, the controller and other measuring instruments, wherein the transverse beam and the longitudinal beam are fixedly connected, the transverse beam is arranged in the middle of the longitudinal beam, the battery case and a display and control system are installed on the transverse beam, and a plurality of sensors are fixedly connected to the transverse beam and the longitudinal beam, and used for collecting signals. The mechanical structure of the novel high-speed rail track measuring instrument has the advantages that the structure is simple, functions of collection, processing and display are integrated, absolute accuracy can be effectively guaranteed, operation is convenient, and working efficiency is high.

The invention belongs to the avionics system test technology, and relates to a clock synchronization method of helicopter avionics system test network. The clock synchronization method of helicopter avionics system test network includes the steps: 1) distributing clock synchronization reference information; 2) receiving the clock synchronization reference information by a computer, operating a real time operation system, of the local network; 3) comparing the time difference between the computer and the clock synchronization reference information, and if the time difference is less than the absolute error minimum accuracy time length, counting the clock updating cycle at the moment into a set of clock updating cycles satisfying the absolute accuracy requirement, and if not, omitting the clock updating cycle; 4) if all the clock updating cycles are travesed, entering the step 5, and if not, changing the clock updating cycle and returning to the step 1; and 5) successively taking the clock updating cycles satisfying the absolute accuracy requirement as the updating cycle of the clock synchronization equipment, and sending the clock synchronization reference information to each computer until the debugging relative error in the clock updating cycle is less than the relative error minimum accuracy time length.

The invention relates to a high-precision thermocouple input module comprising an isolator, an amplifier, an analog-digital conversion unit, a controller, a digital-analog converting unit and an electronic switch. The isolator is connected with a thermocouple, the output end of the amplifier is connected with the analog-digital conversion unit, and the output end of the analog-digital conversion unit is connected to the controller. The module is characterized in that the grounding end of the isolator is grounded and outputs a grounding joint outwards; the voltage output end of the isolator outputs two joints outwards; the controller outputs feedback signals to the digital-analog converting unit according to signals acquired from the analog-digital conversion unit; and the output end of the digital-analog converting unit outputs an input joint outwards. Another technical scheme of the invention provides a high-precision thermocouple input measuring method adopting the thermocouple input module. The module has the advantages that the entire absolute accuracy of thermocouple signals is guaranteed to range from 0.1 to 0.2 DEG C, the absolute precision can achieve 0.005 to 0.01%, and actual requirements of the industrial control process can be met.

The invention discloses a printing system. The printing system comprises a printer, a controller which is connected with the printer through an RS232 interface, and a touch screen which is connected with the controller through the RS422 interface. A printing method is further disclosed. The method comprises the following steps: transmitting a printing request command to the printer by using an M8402 command in a Mitsubishi FX-series PLC (Programmable Logical Controller), wherein M8401 is taken as a mutex; if M8401 is OFF, transmitting data through M8402. By adopting the printing system, the instantaneity of data and the absolute accuracy of data can be ensured.