174 results about "Slight change" patented technology

In the coating composition for a optical fiber of the present invention, a polyurethane (meth)acrylate oligomer (A), which is based on a urethane prepolymer having an equivalent ratio of NCO group in a polyisocyanate (a) to OH group in a polyol (b) of more than 3.0, is used and the oligomer (A) has a mixing weight ratio of an oligomer (d) having a number average molecular weight of 800 or less to an oligomer (e) having a number average molecular weight of 1,000 or more of 30 / 70-70 / 30. The coating composition of this invention has a low viscosity, and therefore, is suitable for a rapid fiber-drawing in a production of an optical fiber. Further, a cured material obtained from the coating composition of the present invention has both a high elastic modulus and a high elongation, which properties are required for a hard material, and has a slight change of elastic modulus with a change of temperature to improve a long-term reliability of an optical fiber.

The invention discloses a method and device for identity authentication of a person and an identity card based on face recognition. The method for identity authentication of a person and an identity card based on face recognition comprises the following steps: collecting the face image; detecting the position of the face and extracting the feature vectors according to the face image; confirming whether the user is a live object or not, if not, returning and collecting the face image again; if so, collecting the identity card information; transmitting the extracted feature vectors and the identity card information to the background for authentication; returning the authentication results and prompting the user, which are performed by the background; if authentication is passed, updating the local and remote databases. According to the invention, the authentication efficiency of the ''witness the same'' is improved. The method for identity authentication of a person and an identity card based on face recognition is convenient for large-scale application in various occasions, and can solve the technical problems that the authentication is inaccurate caused by the slight change of the face due to the passage of time, the authentication to the person without carrying the identity card is difficult, and the like.

Techniques are provided for tracking patient respiration based upon intracardiac electrogram (IEGM) signals or other electrical cardiac signals. Briefly, respiration patterns are detected based upon cycle-to-cycle changes in morphological features associated with individual electrical events with the IEGM signals. For example, slight changes in the peak amplitudes of QRS-complexes, P-waves or T-waves are tracked to identify cyclical variations representative of patient respiration. Alternatively, the integrals of the morphological features of the individual events may be calculated for use in tracking respiration. In any case, once respiration patterns have been identified, episodes of abnormal respiration, such as apnea, hyperpnea, nocturnal asthma, or the like, may be detected and therapy automatically delivered. In particular, techniques for detecting abnormal respiration based on various respiratory parameters derived from the IEGM—such as respiration depth and respiration power—are described.

An electric storage device management system includes a voltage sensor, a memory, and a controller. The voltage sensor detects a voltage across an electric storage device having a correlation between an open circuit voltage (OCV) and a state of charge (SOC) including a slight change region and a sharp change region. The memory stores information on correlation between OCV and SOC in the sharp change region. The controller is configured to: determine an OCV based on a voltage detected by the voltage sensor; determine whether the defined OCV is within the sharp change region; determine an SOC corresponding to the defined OCV based on the stored information stored if the defined OCV is within the sharp change region; determine the determined SOC as an estimated SOC; and prohibit the determining of the SOC as an estimated SOC if the defined OCV is out of the sharp change region.

The invention relates to a double-random-phase optical color image encryption device and method, which belong to the field of optical image processing technique. The double-random-phase optical color image encryption device comprises an optical image encryption device and an optical image decryption device. The double-random-phase optical color image encryption device has high flexibility by adopting a joint fractional Fourier transform correlator, and the encryption technique based on the joint fractional Fourier transform correlator structure has high safety even if a correct phase mask cannot decrypt the original image information if the position has a slight change due to the translation variability of the fractional Fourier transform. The decryption device can be achieved only by arranging an electronic shutter of the encryption device and using the original illumination parallel light as the light source, and does not generate the optical field distribution conjugated to the encryption process. Based on the parallel processing characteristics of an optical information processing system, the double-random-phase optical color image encryption device can achieve color image encryption and decryption by use of single wavelength. Therefore, the double-random-phase optical color image encryption device has the advantages of simple structure, simplified system, lowered cost, high safe performance, and wide application range, and is convenient in operation.

The invention discloses a control method of an electronic expansion valve. The control method comprises the steps of periodically acquiring the current temperature of the environment in which an air conditioning system outdoor unit is positioned; when the preset temperature range which the current temperature belongs to is the same as the preset temperature range which the environment temperature of the last period belongs to, acquiring the current working frequency of an air conditioning system compressor at intervals every preset time; and every time when the current working frequency is acquired, adjusting the opening of the electronic expansion valve based on the current working frequency. The invention further discloses a control device of the electronic expansion valve. According to the control method and the control device, when the preset temperature range which the current temperature of the environment in which the air conditioning system is positioned belongs to does not change, namely, the outdoor environment temperature has slight change, the opening of the electronic expansion valve is regularly adjusted according to the current working efficiency of the compressor, so that the purpose that the opening of the electronic expansion valve is precisely adjusted is achieved, the air conditioning system is enabled to always run in better throttling modes, and the cooling and heating effects and energy efficiency of the air conditioning system are improved after the air conditioning system is started.

The invention provides a crystal growth control method, device and system for a shouldering process and a computer storage medium. The method comprises: presetting crystal diameter change values and crystal growth process parameters at different stages of the shouldering process, acquiring crystal diameters at different stages of the shouldering process, calculating a change value, comparing the change value of the crystal diameters and the set values to obtain a difference value as an input variable of a PID algorithm, calculating an adjustment value of the crystal growth process parameter through the PID algorithm, wherein the adjustment value is used as an output variable of the PID algorithm, and adding the adjustment value of the crystal growth process parameter to the set value to obtain a process parameter in the actual crystal growth process. The PID algorithm is used for controlling and adjusting the diameter change of the shouldering process, prevents the influence of the thermal field slight change on the shouldering process, guarantees the consistent change of the crystal diameters and improves the repeatability and process stability of the shouldering process.

A thermal printer 1 and control method for controlling print speed to prevent variation in printing pitch due to frequent slight changes in the print speed following a significant change in print speed. The print speed, which is the speed at which the print medium i.e., paper is conveyed when printing, is controlled based on known print speed control factors. The thermal printer comprises a paper feed mechanism for conveying the print medium at a controlled print speed passed a thermal print head, a print speed control unit 9 for controlling the print speed of the paper feed mechanism based on the print speed control factors, a print speed change acquisition unit 3 for determining the change in the print speed over a predetermined time, and a comparison unit 7 for determining if the change in print speed exceeds a predetermined threshold value. The print speed control unit 9 limits change in the print speed based on the print speed control factors for a predetermined time after the comparison unit 7 determines that the change in print speed exceeds the threshold value.

The invention discloses a vertical semi-dovetail tenon node connection structure for a wood structure building beam column. In the wood structure building, the connection between a middle column and a wood beam or a side column and the wood beam adopts the vertical semi-dovetail tenon node connection structure, and knotting to each other is conducted through the tenon vertical semi-dovetail on the wood beam structure, so that the seismic horizontal bearing tensile strength of a frame is improved. Meanwhile, the vertical semi-dovetail tenon node has strong bending resistance ability. The vertical semi-dovetail tenon node is connected and applied to a wood structure farm house or a civil mixed structure, so that the seismic bearing ability of the wood structure farm house or the civil mixed structure is greatly improved; and the vertical semi-dovetail tenon node connection form makes a slight change on the basis of inheriting a traditional mortise and tenon node connection form, a nail and an iron are still not needed, the vertical semi-dovetail tenon node connection form is more suitable for drawing materials and constructing houses locally of remote mountainous areas, and the construction progress and construction quality are improved in a large degree; and meanwhile, cost of vertical semi-dovetail tenon node is low, and the cost of engineering structure can be reduced.

The invention discloses a method for amplifying small change of video based on PCA, The implementation process is as follows: first converting the input video image from the RGB color space to the YIQcolor space, each frame of the video is then decomposed into spatial Gaussian / Laplacian pyramids in a frame cycle manner, and then PCA processing is carried out on the data decomposed by spatial scale, to get signals of small changes of interest, then by directly multiplying the magnification factor set by one person, Realize the enhancement of the small signal amplitude, then reconstruct the Gaussian / Laplace pyramid, and finally add it with the original video source, and transform the processed video image from YIQ color space to RGB color space, and obtain the enlarged result of the small change of the video. As the PCA processing itself has the function of suppressing noise, the method of the invention can effectively suppress noise while amplifying a slight change, and the practical application of the video amplification method is expanded.

The present invention provides a detecting element which can stably detect a substance with high sensitivity; a detecting device therefor; and a detecting method therefor. The detecting element and the detecting device according to the present invention have a plurality of planes having a plurality of mutually-separated metallic structures arranged thereon. The detecting method according to the present invention includes making a detecting light irradiate the detecting element so that the light can intersect a plurality of the planes. Thereby, the detecting light is more frequently absorbed in the vicinity of the metallic structure and the detecting device can stably detect a slight change of a spectrum originating from a trace change of a refractive index occurring in the vicinity of the metallic structure, with the high sensitivity.

The invention relates to an ultrasound suspension field visible measuring method and a measuring system using the same. The technology is characterized in that: light beams emitted by a laser are divided into a first set of parallel beams and a second set of parallel beams; the first parallel beams run through an ultrasound suspension field to be measured, and are reflected and then run through the ultrasound suspension field to be measured along the original path, thereby forming measured object light; the second parallel beams are used as reference light, occur interference with the measured object light and form images on an area array CCD. The ultrasound suspension field visible measuring method has the advantages that: in the process of carrying out measurement, the method can avoid producing error, realize instantaneous record and detect the distribution of interference fringes caused by slight change of refractive index of the air due to sound field disturbance, so as to make a measuring result more intuitionistic and accurate. A digital hologram obtained by the measuring device CCD realizes various complex amplitude operations and manipulations in the real sense through digital reappearance so that a data process is simple, rapid and high precise. The measuring device can carry out real-time measurement to a large-size flow field and have great advantage for realizing undisturbed measurement of the ultrasound suspension field.

The invention relates to a distribution network line fault type judging method based on voltage characteristics, belonging to the field of electric power grids. The distribution network line fault type judging method based on the voltage characteristics is judging a fault phase and judging the grounding conditions of the power supply side and the load side according to the phase, amplitude, and voltage relationships between the power supply side and the load side. If the current is collected by means of a conventional method, the current at the time of the fault is small, and the precise action cannot be performed; and if an amplifier is used, when a slight change occurs in load or the like, it is easy to erroneously judge to be a fault. The invention utilizes the characteristics that thevoltage phase and the amplitude change greatly in various faults and the difference between the power supply side and the load side is large, which benefits mutual comparison and judgment of the faulttype through the voltage characteristics.

A fuel gas heating control equipment in accordance with the present invention is provided with a gain-determining portion 21 and a time-constant-determining portion 22 which determine values of a gain and a time constant to be used for PI calculations being performed by a PI calculation portion 14. The gain-determining portion 21 specifies a small time constant for the PI calculation portion 14 during load fluctuations when the generator output increases, and specifies a large time constant for the PI calculation portion 14 when the generator output reaches the maximum output. In consequence, during load fluctuations, responsiveness is good and a rapid change in temperature can be followed, so that a fuel gas temperature will not fluctuate in response to a slight change in temperature at the maximum output, thereby achieving a stable fuel gas temperature.

A fuel gas heating control equipment in accordance with the present invention is provided with a gain-determining portion 21 and a time-constant-determining portion 22 which determine values of a gain and a time constant to be used for PI calculations being performed by a PI calculation portion 14. The gain-determining portion 21 specifies a small time constant for the PI calculation portion 14 during load fluctuations when the generator output increases, and specifies a large time constant for the PI calculation portion 14 when the generator output reaches the maximum output. In consequence, during load fluctuations, responsiveness is good and a rapid change in temperature can be followed, so that a fuel gas temperature will not fluctuate in response to a slight change in temperature at the maximum output, thereby achieving a stable fuel gas temperature.

A method, optical module, and optical amplifier are configured to detect fiber discontinuities at or near a port from which high powered optical signals are input into a fiber span. These fiber discontinuities can include fiber pinches, and are detected by monitoring for slight changes in a backscatter signal. Detection is quick and efficient based on the backscatter signal being attenuated by the fiber discontinuities twice, namely once as the high powered optical signals and again as the associated backscatter signal of the high powered optical signals returning to the port. Various remedial actions can be taken upon detecting fiber pinches at or near the port.

The invention relates to a billiard repositioning method based on an image matching technology in a computer billiard assistant judging system. The method is realized in the computer billiard assistant judging system; the system comprises a camera, a Snooker billiard table, a video capture device and a computer; and the camera is arranged above the center of the billiard table surface. The method comprises the following steps of judging whether the billiard balls are displaced and repositioning displaced billiard balls. The invention has the beneficial effects of: 1. having memory function, storing each frame image captured in the billiard game, being capable of replaying any frame picture in the game; 2. having fast speed for repositioning judgment and operation and realizing real-time guide repositioning; 3. having high repositioning precision, carrying out comparison on pixels directly when images are matched, thus being very sensitive to slight change of images, being capable of finding the difference of one pixel in the fine search process, especially fine searching during repositioning, searching a point with smallest error in the current pixel point and 8 neighborhood points thereof all the time.

The invention discloses a composite non-noble metal oxygen reduction catalyst, consisting of an oxidant, a metal porphyrin compound and a carbon, wherein, the mass ratio of the oxidant and the metal porphyrin compound is 1:1-1:80; and the mass ratio of the metal porphyrin compound and the carbon is 1:1-1:20. The catalyst uses cheap SiO, SiO2, ZrO, ZrO2 or ZnO2 to partly replace the metal porphyrin compound in the carbon-loaded metal porphyrin series oxygen reduction catalyst used for low-temperature fuel battery, leads the oxygen reduction peak current density of the series catalyst to be improved to 1.5-3 times under slight change of the oxygen reduction peak level and reduces the cost.

The invention relates to a device and a method for preventing the sediment deposition and treating the sediment in a ballast tank of a ship. The traditional L-shaped ballast tank is divided into a topside ballast tank and a bottom ballast tank, wherein the topside ballast tank structure is provided with sediment outlet holes, and the shape and the size of the drain holes are optimized. During ballasting in the water area with a large sediment charge, only the topside ballast tank is ballasted, and the bottom ballast tank is in the void state, so that the ship can achieve the draught and the stability for safe sailing; and when the ship drives away from water field containing the sediment, the bottom ballast tank is ballasted, and the sediment in the topside ballast tank is discharged by a pump or gravity. For the conversion of the traditional ship, the invention has the advantages of slight change to the ship structure and the ballast piping, short construction time, convenient operation flow and lower cost; and for a newly-made ship, the invention has the advantage that the effect of preventing the sediment can be achieved as long as increasing less design and manufacturing cost, thereby achieving huge practical meanings and extensive application prospects.

The invention discloses a device for generating a double-uniformity-area magnetic field and a correction method for magnetometer correction. The device comprises a sliding gradient magnetic field coil device and a gradient magnetic field excitation device, wherein the sliding gradient magnetic field coil device comprises a uniform solenoid, a torque-free solenoid, a sliding table and a base. The gradient magnetic field excitation device comprises a dual-output direct-current current source and two ampere meters, and can generate two uniform magnetic fields meeting gradient test requirements. The problem that positioning errors and position slight changes of a probe influence the correction result of gradient magnetometer correction when a traditional gradient magnetic field device is used in the correction process is solved. Magnetic output at any gradient can be generated, manufacturing is simple, and large-gradient distance measuring can be achieved.

A truss rod apparatus, for use within a stringed musical instrument, to correct both forward and backward bowing of the instrument's neck. The apparatus includes an elongate rod with an adjustor mechanism incorporating two axially oriented threaded sections of similar thread direction but differing thread pitches. In use, the adjustable rod is attached near its ends to a second elongate member. Turning the adjustor mechanism in either direction causes the threaded sections to advance at different rates, thereby causing a slight change in length of the rod. The change in length relative to the second elongate member, induces a bending force on the apparatus which in turn induces a corrective bending in the neck of the musical instrument into which the truss rod apparatus is embedded.

A chain guide improves bending rigidity while satisfying requirements for compactness and weight reduction of an engine and restricting cost increases. The chain guide includes a guide body having an engaging protrusion capable of engaging with a long engaging hole formed in an engine block in a longitudinally slidable manner and a shoe fixed over the guide body and having a chain sliding surface. In this case, an upward support of the engaging protrusion of the guide body in the engaging hole of the engine block results in an increase in the bending rigidity of the whole chain guide. Moreover, the engaging protrusion of the guide body is only inserted into the engaging hole of the engine block. This does not cause an increase in size and weight, and causes only a slight change of a mold, leading to less cost increases.

The invention discloses a power frequency interference filtering method, which is used for filtering power frequency interference with a mutated signal. The method comprises the following steps of: directly filtering an original signal of a nonmutationed part by using a wave trap, and taking the filtered signal as a system output; subtracting a result of previous filtering from an original signalof a mutated part, adding a previous filtering result section in a mode of end-to-end linear connection, filtering by using the wave trap, adding a result of the previous filtering to a filtering result, and subtracting a previous filtering result section in the mode of end-to-end linear connection; and repeating the process. In the electrocardiograph (ECG) detection process, 50 / 60 Hz power frequency interference covers the slight change in an original electrocardiograph, and influences an electrocardiograph diagnosis. When filtering the power frequency interference, the conventional linear time invariant wave trap triggers the ringing after a QRS complex wave, and influences the measurement of signals such as late potential and the like. The power frequency interference filtering method processes the signals of the input and output ends of the wave trap by utilizing detected QRS complex wave terminals, and traps the waves and avoids the ringing at the same time.

The color reproduction performance of image input / output devices has been improved greatly and even very slight changes in color ascribable to a color balance correction are recognizable. As a consequence, there are cases where a specific color shift, such as a color shift in the yellow or blue direction, gives a disagreeable sensation when applied with regard to a slight color change in the color of the human skin, which is a memory color. Accordingly, highlight and shadow points are detected based upon the histogram of an image, color information of the highlight and shadow points is revised by adjusting average color difference information based upon a hue angle acquired from average color difference information of image data having luminance levels of the highlight and shadow points, and the image is corrected based upon the revised color information of the highlight and shadow points.

A chain guide improves bending rigidity while satisfying requirements for compactness and weight reduction of an engine and restricting cost increases. The chain guide includes a guide body having an engaging protrusion capable of engaging with a long engaging hole formed in an engine block in a longitudinally slidable manner and a shoe fixed over the guide body and having a chain sliding surface. In this case, an upward support of the engaging protrusion of the guide body in the engaging hole of the engine block results in an increase in the bending rigidity of the whole chain guide. Moreover, the engaging protrusion of the guide body is only inserted into the engaging hole of the engine block. This does not cause an increase in size and weight, and causes only a slight change of a mold, leading to less cost increases.

The invention provides a projection and exposure device and a device for correcting the dynamic location error of an illuminating beam and a method thereof, wherein, the projection and exposure device structure separates a lighting system from the pupil position of an illuminating mirror group and arranges an optical element behind the pupil of the illuminating mirror group on a main frame on which a reticle stage is also arranged, meanwhile, the optical element in front of the pupil of the illuminating mirror group is arranged on a mechanical frame on which the lighting system is also arranged, thus transforming the displacement error of light luminous into a small telecentric angle error; and the device and the method for correcting the dynamic location error of the illuminating beam of a photoetching machine further reduces the telecentric angle error. By adopting the invention, the smaller displacement of the light luminous corresponding to an objective is transformed into the slight change of a pupil telecentric degree or a lighting telecentric angle, and by utilizing the advantage that the slight change of the lighting telecentric angle has little influence on each property of the photoetching machine, scan dose performance is improved.

The utility model discloses a monitoring device for on-line continuous welding zone which automatically observes slight changes of the welding zone in order to reduce the labor intensity and enhance the product quality. The utility model comprises an observation window positioned at a welding protection cover, a colorful video camera arranged opposite to the observation window, an optical filtering lens arranged in front of the colorful video camera and a colorful display which is used to display the output signals of the colorful video camera. The utility model is mainly applied to observe the welding zone during the edge joint of welding metal pipes.

A capacitive coupling-type transmitting and receiving circuit for information signal is provided in which attenuation of a signal on a non-contact transmission path via a capacitor and a change of voltage on the receiving side due to a slight change in capacitance are suppressed, modulation and demodulation processes of signals are unnecessary, and non-contact transmission which does not depend on the transmission rate is enabled. The capacitor is formed with a transmitting electrode on a transmission board and a receiving electrode on a display panel board, and an insulating member is interposed between the electrodes. The transmitting board comprises a transmission signal processing circuit which converts display data from an external signal source into a voltage signal. The display panel board comprises an impedance converter circuit and a reception signal processing circuit.

The invention provides a multifunctional restaurant robot, belongs to the technical field of robots. The multifunctional restaurant robot is used for replacing waiters for feeding, ordering, greetingand recycling tableware in a restaurant, a cafe, a teahouse and a hotel, but also can used for objects sorting, conveying and the like in a factory workshop and a logistics company with slight changes. The labor intensity of a service worker can be reduced, and the problem that the labor cost is increased is solved. The robot adopts a four piece combined structure of a head, a chest, an abdomen and a foot part, namely a chassis, the four pieces are connected through screws and can be detached, so that standardization of parts is achieved, batch production is facilitated, the labor productivityis improved, and the cost is reduced; the internal space of the robot is fully utilized, and the purposes of multi-sending and multi-recycling are achieved. Particularly, diaphragm pieces are arranged on rear wheels of the robot and are used for digital measurement of the angle, namely the distance; and a distance parameter digital closed-loop feedback control mode is adopted to control the advancing track and the advancing speed of the robot, and relative to analog feedback, the control precision can be greatly improved.