50 results about "Peak response" patented technology

The invention belongs to the water power scheduling operation field, and relates to a super-large scale hydropower station group short period practical scheduling method; the method divides all hydropower stations into three types according to scheduling characteristics including system hierarchy, space attributes, task requirements and plan particularity, and proposes an abandoned water correction strategy based on pitch peak response and a valley period load balancing reduction strategy, thus realizing checking analysis and output adjustment of power stations of a fixed scheduling mode; forcascade hydropower stations of middle and small rivers, the method takes the total output process as control conditions, uses the minimum total power consumption as an object, thus optimizing load distribution among the cascade hydropower stations; for large scale river cascade hydropower stations, the method builds a pitch peak scheduling model, proposes a balance power station equal load factorscheduling method, thus realizing system pitch peak response and all time load balance. The method can fast provide a reasonable water power scheduling result, thus satisfying power grid real operation timeliness and practicality requirements, and providing a new technical path for effectively solving super-large scale hydropower system scheduling problems.

The invention discloses a reflective GaA1As photoelectric cathode with the sensitive peak response at 532nm and a preparation method of the reflective GaA1As photoelectric cathode. The cathode comprises a GaAs substrate (1), a Ga1-x1A1x1As buffer layer (2), a Gal-x2A1x2As doping concentration gradient emission layer (3) and a Cs / O activating layer (4), which are orderly superposed from the bottom up. A well growing Ga1-x1A1x1As photoelectric cathode component is chemically cleaned, heated, purified and activated via (Cs, O), and the Cs / O activating layer is finally formed on the surface of the Ga1-x2A1x2As doping concentration gradient emission layer. According to the invention, the problems that the response wave band is wide and the existing GaAs photoelectric cathode generates large noises at 532nm and cannot be used around the clock are solved.

The present invention relates to a detection method for odor substances in a water environment. The detection method comprises: (1) standard curve preparation: preparing different concentrations of mixing standard solutions of various odor substances, carrying out a pre-treatment, carrying out gas chromatography and mass spectrometry detection, corresponding the detected mass spectrometry response values and the detected chromatography peak response values of each odor substance to the concentration, and preparing a standard curve; (2) water sample collection and storage: collecting a water sample to be detected, and placing into a preservation container so as to be stored; and (3) water sample detection: taking out the stored water sample, carrying out a pre-treatment, transferring to a gas chromatograph-mass spectrometer so as to be detected, and combining the detected mass spectrometry response value and the standard curve prepared in the step (1) so as to obtain the concentration of the odor substance in the water sample. Compared with the detection method in the prior art, the detection method of the present invention has advantages of precise quantitation, high odor substance recovery rate, environmental protection, easy operation and the like.

The invention discloses a quantum well infrared detector of a photonic crystal coupling narrowband response. A photonic crystal is combined with a quantum well infrared detecting unit; and the photonic crystal, as a coupling unit, is directly nested in the infrared detecting unit. The modulation of a periodic surface structure and the photonic crystal to photon state leads the response of the quantum well infrared detecting unit to specific wave bands to be strengthened, while the response to other wave bands is restrained, thus achieving the detection of narrow band. Compared with the traditional quantum well detector, the detector has the advantages as follows: firstly, response wave band is narrow. The detector can regulate the position of peak response wavelength through the regulation and control of the photonic crystal to the photon state and the self structure control of the quantum well; secondly, the detection efficiency of the peak wavelength is high. Due to the realization of the control of the photon state, the detection efficiency is improved; and thirdly, user-oriented design is facilitated. New design dimension is provided for the regulation and control of the photon state, thus being more convenient for optimizing the matching property of response wave band of product according to the needs of the users.

A method for determining a surface quality of a substrate sample using a differential interference contrast microscope is described. The microscope includes an eyepiece, an eyepiece focus adjustment, a microscope focus adjustment, a light source, at least one of an aperture or reticule, a camera view, a prism and an eyepiece. The method includes calibrating the focus of the eyepiece with the focus of the camera and determining a peak response ratio for the microscope through adjustment of phase between differential beams of the microscope. The substrate sample is placed under the microscope, illuminated with the light source, and brought into focus with the microscope focus. Phase between differential beams is adjusted, at least one image of the substrate sample is captured and processed to determine a level of surface structure on the substrate sample.

In a substrate in which a reflection coefficient γ of a surface acoustic wave per electrode is small, the invention obtains a Q value or a CI value level, which is equivalent to or higher than that of a related art product, at a device size which is equivalent to the related art product which addresses the problem that the size of a surface acoustic wave resonator becomes larger. A surface acoustic wave resonator includes one interdigital transducer to excite a surface acoustic wave in a propagation direction x on a piezoelectric plate and a pair of reflectors arranged on both sides thereof in the propagation direction. The interdigital transducer is divided into three regions. The electrode fingers of the interdigital transducer of each region are formed at a fixed pitch which differs within 2%. The surface acoustic wave resonator possesses a single peak response. The form in which a vibration displacement envelope amplitude in the interdigital transducer region is normalized is a form which takes a maximum value 1 at the center position, which smoothly takes a value in a range of 0.33 to 0.53 at a position ¼ from both ends, and which smoothly takes a value in a range of 0.048 to 0.177 at positions at both ends.

The invention discloses a method for detecting coupling response of transmission cables excited by plane electromagnetic waves. The method is based on a frequency spectrum structure, a field-line coupling physical model and an equivalent circuit model of the incident plane electromagnetic waves and compares the relation of the wavelength gamma 0 of the incident waves with a model met by the length 1 of the transmission cables, thereby respectively obtaining a low-frequency lumped parameter model L(E<inc>,1) and a high-frequency distributed parameter model H(E0, fi, 1, d, alpha, psi and phi); then a first current response I low and a second current response I high are output after the respective treatment of the two models, and the coupling response of the transmission cables is finally obtained after overlapping the first current response I low and the second current response I high. The method simplifies the field-to-line frequency band coupling to the frequency point coupling by seeking peak response frequency points and combines the road model and the distributed parameter model, thereby being capable of rapidly obtaining the response of terminal current of the transmission cables excited by any plane electromagnetic wave. The method simplifies the filed-line coupling problem under the complicated electromagnetic environment and simultaneously provides the reference for the design of equipment-level electromagnetic compatibility and system-level electromagnetic compatibility.

The invention belongs to the technical field of building construction, and discloses a test method for wind-induced internal pressure of a building with openings to avoid the effect of air column resonance. The test method comprises the steps of when the test sampling frequency is 331 Hz, the sampling time is 61.8 seconds, and the total volume after compensation is different times of the originalvolume, verifying the existence of an air column resonance phenomenon; forming partition openings of different sizes to compare and analyze the adverse effect of the air column resonance on the measurement of the pulsating internal pressure; determining the height of a volume compensation box by the calculation of the air column resonance frequency; determining the length and width of the compensation box according to the similar law of internal pressure and the principle that the compensation box is "deep and narrow", ensuring that the air column resonance frequency is in a high frequency region of an internal pressure power spectral density curve, and reducing the effect of the air column resonance energy on the pulsating internal pressure. The calculation formula of the air column resonance frequency of an internal pressure model cavity is introduced through a complex compressor piping system, and the size of the volume compensation box is determined in advance to avoid the adverseeffect of the air column resonance and directly increase the peak response of the internal pressure.

Species detection techniques are described based on measurement of a dynamic response to an external stimulus. One embodiment includes a voltage stimulus applied to a polymer electrolyte fuel cell (PEFC), with the response to said stimulus used to measure CO concentration on the anode catalyst. The principles of symbolic dynamics, finite state machines or a simplified peak response-to-asymptotic value measurement can be used to achieve a high degree of precision for measuring CO concentrations. Using the techniques of the present invention, CO poisoning of a fuel cell can be monitored and diagnosed before reaching a critical condition, thereby allowing early implementation of mitigation or graceful degradation strategies.

The invention provides a method for designing a terahertz quantum well photoelectric detector. The method comprises the steps that (1) according to wave length lambda p of peak response frequency of the terahertz quantum well photoelectric detector in device materials, a period P of an etching grating is designed to enable P equals to the lambda p; (2) electromagnetic field distribution inside the terahertz quantum well photoelectric detector under irradiation of incident light is calculated; (3) components which contribute to intersubband transition in the electromagnetic field distribution are extracted, integration is carried out on energy of the components in an active area, and the total energy It which contributes to the intersubband transition in the active area is obtained; (4) different grating heights h are set, the total energy It under the different grating heights h is calculated, and the grating height h when the total energy It is maximum is selected at the height of the etching grating. The method can effectively improve the performance of the terahertz quantum well photoelectric detector at the peak response frequency point, and has important significance on achievement and imaging application of high-performance terahertz quantum well photoelectric detectors.

The invention discloses a one-dimensional metal grating for a terahertz quantum well detector and a design method thereof. Period d of the one-dimensional metal grating is equal to wavelength lambda peak of peak response frequency corresponding to the terahertz quantum well detector in a device material of the terahertz quantum well detector. The design method of the terahertz quantum well detector comprises the following steps of: 1) measuring a photocurrent spectrum of a device under the condition of end face incidence at an angle of 45 degrees, determining response peak of the device, determining cut-off frequency of the grating according to the peak response frequency of the device, and further designing the period of the grating; 2) selecting a proper grating material; and 3) designing a proper grating thickness. By adopting the method, an intrinsic response region and the response peak of the device can be measured through measurement of an infrared fourier transform spectrometer, and the wavelength lambda peak of the peak response frequency in the device material is calculated, so that the period d of the grating is designed to be equal to lambda peak. The one-dimensional metal grating has great significance to implementation of the high-performance terahertz quantum well detector and imaging application thereof.

The invention discloses a correlation filtering tracking method based on space-time perception and multi-peak response. The method comprises the following steps: firstly, determining the position andsize of a tracking target on a first frame image of a tracking video; training a target prediction model of the tth frame of image by using the position and size of the tracking target determined by the t-1th frame of image; and finally, determining the position and size of the tracking target on the t-th frame of image by using the target prediction model of the t-th frame of image. According tothe method, illumination change and attitude change can occur around the target, continuous and robust tracking can be achieved, wrong updating of the model cannot be affected due to the fact that thetarget is shielded or disturbed by similar objects, the model is always kept in a good state, and the target tracking accuracy rate is high; and meanwhile, real-time data can be quickly processed inthe tracking process, so that the method can be applied to actual life.

The invention discloses an anti-occlusion correlation filtering tracking method and system / device based on multi-peak response. When a target is occluded, most correlation filtering tracking algorithms generate false tracking, an object which occluds the target is regarded as the target, and then a template is updated, so that a model drifts, and finally the tracking fails. According to the anti-occlusion related filtering tracking method, whether a current frame target is occluded or not is detected firstly, and template updating of the current frame is stopped under the condition that it isjudged that the current frame target is occluded early, so that wrong information cannot be learned, and model drifting is prevented. Secondly, an occlusion processing mechanism is added in the anti-occlusion correlation filtering tracking method, the optimal target position of the current frame is found out, when the target appears again, tracking is still correct, and therefore the accuracy androbustness of the tracking algorithm are further improved.

The invention relates to a method for quickly detecting quality of frying oil based on synchronous fluorometry. A correlation model of synchronous fluorescence peak response and physicochemical indexes of an oil sample is established by utilizing a statistical method. In the correlation model, the relations between the central emission wavelength and carbonyl value, between the central emission wavelength and the polar matter content, between the fluorescence intensity and the carbonyl value and between the fluorescence intensity and the polar matter content are high positive correlations. According to a method the same as that of synchronous fluorescence spectrum measurement in the establishment of the correlation model, the synchronous fluorescence spectrum of the sample of the frying oil to be measured is measured, the sizes of the central emission wavelength and the fluorescence intensity of a pectrogram of the synchronous fluorescence spectrum are compared with the correlation model, the carbonyl value and the polar matter content in the frying oil are analyzed, and the quality of the frying oil is judged. Compared with a conventional method, the method is simple in technology and easy to operate, the frying oil sample can be scanned directly by a computer after sampling, the pretreatment is avoided, and the time for detecting one sample is only several minutes.

The invention discloses an instance segmentation algorithm based on peak response enhancement and computing equipment, and the algorithm comprises the steps: firstly obtaining a data set which comprises a training image and a test image, and only the training image comprises the class information of an object on the image; designing an implementation peak response generator to acquire a corresponding incomplete peak response graph based on the input image and the implementation peak response generator; designing a peak response enhancement network, and based on the incomplete peak response graph and the peak response enhancement network to acquire an enhanced version peak response graph with more comprehensive coverage; performing physical property-like sampling on the input image to obtain a physical property-like sampling set; designing a matching strategy; and finally, according to a matching strategy, matching the enhanced version peak response graph corresponding to the test imagewith the physical property sampling set to obtain a final instance segmentation result of the test image. According to the invention, the weak supervision instance segmentation effect is realized.

The present invention discloses a dynamic modeling method for a suspended liquid filling tank, and belongs to the field of spacecraft dynamics modeling and analysis. The ''shell + beam + concentrated mass point elements'' dynamic modeling method for the suspended liquid filling tank is adopted, a tank section connected with the support boundary is simulated by using the shell element, and other tank section is simulated by using the beam element; and in addition, in order to ensure a relatively large stiffness after pressurization of the actual tank, the multi-point constraint RBE2 is established on the upper and lower end surfaces of the shell element, and according to the method of consistency of the center of mass, the liquid is attached to the beam element in a corresponding position by using the discrete concentrated mass element. Compared with the traditional ''beam element'' and ''shell element'', the method disclosed by the present invention combines the advantages of different elements, so that on one hand, the connection stiffness between the tank and the main structure is not changed, both local modalities and feature point peak response are taken into account at the same time, and the consistency of the obtained modal and dynamic response predictive value and experimental value is better.

An application program and method for determining the strength of electronic products exposed to mechanical shock, including application program steps of (i) describing the mechanical configuration of the electronic product; (ii) describing the stock response; (iii) calculating natural response modes of the circuit card; (iv) calculating stress functions for each component, each response mode; (v) using stress functions to determine modal component stresses at peak response; (vi) removing computer calculation error by comparing the stresses for all components to expectations; (vii) expectations numerically defined by performing equivalent analyses on test experience.

The invention provides a method to detect the peak response wavelength of the infrared quantum well material of gallium arsenide or gallium aluminum arsenide. The invention makes use of a Raman spectrograph to detect the backscattering of the infrared quantum well material to get the Raman scattering spectrogram of the material; and converts the strongest peak value Raman frequency shifting Delta v1 into wavelength, which is the peak response wavelength of the infrared quantum well material. The method provided by the invention has the advantages of saving time and saving labor; simple processing procedure of specimens, and avoiding the complex and fussy processing procedure; that the invention seldom damages the materials and consumes few materials.

The invention provides a method and a device for optimizing the thickness of an absorption layer of a far infrared blocking impurity band detector, and the method comprises the following steps: obtaining parameters of a physical model of the blocking impurity band detector, and constructing a numerical model of the blocking impurity band detector; according to the numerical model, obtaining a curve of change of the response rate R of the blocking impurity band detector along with the incident wave length; changing the thickness of an absorption layer in the numerical model to obtain a corresponding spectral response rate curve, and obtaining a peak wavelength P of the spectral response rate curve; obtaining a functional expression of a curve which fits the change of the peak response rateRP along with the thickness Tabs of the absorption layer under the bias voltage UF of the positive electrode; obtaining a functional expression of a curve which fits and blocks the change of the impurity band detector production cost Cm along with the absorption layer thickness Tabs; and obtaining the optimal absorption layer thickness according to the obtained functional expression. The method has the advantages that the functional expressions of cost performance factors of the detector with respect to different absorption layer thicknesses are obtained through numerical simulation and data fitting, and the optimal absorption layer thickness is extracted according to the functional expressions.

The present invention discloses a rapid and accurate measurement method for detecting an easily-decomposed energy-containing organic matter through stable standard sample-free UV-HPLC. The method comprises: taking an appropriate amount of an easily-decomposed energy-containing organic matter sample, carrying out refinement a plurality of times so as to be adopted as a standard sample of the organic matter, accurately weighing the standard sample and an impurity standard sample to prepare standard solutions, injecting into a UV-HPLC instrument, calibrating instrument response signals so as to respectively obtain the mass response factors, and calculating the multiple k of the impurity mass response factor relative to the organic matter mass response factor, such that the sample is not required to be weighted and only requires being simply prepared into the sample solution when the easily-decomposed energy-containing organic matter sample is detected by using the UV-HPLC instrument, the sample solution is injected into the UV-HPLC instrument, the detected impurity response value is divided by the detected multiple k to carry out correction, the main peak response value is adopted as the numerator, and the total sum of the main peak response value and the impurity correction response value is divided by the main peak response value so as to calculate the sample purity.

A symbol timing recovery method for DMT-VDSL is disclosed. The method converts the extracted sample to the frequency domain. Using the peaks and the company peaks in the frequency domain, the method determines the correct position of a peak response, thereby calibrating the sample extraction position. Thus, the symbol timing can be recovered.

The invention relates to a leakage current detector for a ground wire of a high-voltage cable shielding net. The leakage current detector comprises an aluminium alloy shell, wherein an alternating-current and direct-current power supply device and a detection device are arranged in the aluminium alloy shell; the anode and the cathode of the alternating-current and direct-current power supply device are respectively connected with a frequency selecting circuit; a secondary side of a current sensor is connected with an I / V conversion circuit through a shielding wire; the I / V conversion circuit is respectively connected with a bidirectional analog output port and the frequency selecting circuit; the frequency selecting circuit is respectively connected with a filtering circuit and a rectifying loop; the filtering circuit is connected with the rectifying loop; the rectifying loop is connected with a peak response time selecting circuit; the peak response time selecting circuit is respectively connected with the input ends of a peak holding loop and an LCD (Liquid Crystal Display) driving loop; and the output end of the peak holding loop 318 is sequentially and electrically connected with a voltage dividing loop, the LCD driving loop and an LCD display screen. According to the leakage current detector, the problem of cable burning loss caused by untimely discovery of multipoint grinding of a grinding wire of an existing cable shielding net is solved.

The invention relates to a vibration isolation device for an electronic product and a design method thereof. The design method includes the steps of firstly determining the static load, stiffness energy capacity and the like of a vibration isolator 1 and a vibration isolator 2 in the principle of the requirement that the center of mass coincides the center line of the stiffness in accordance with the conditions, such as the total mass, the location of the center of mass and the dimension of an electronic device, the space, location, number and mode of the installation of vibration isolators and the peak response frequency of the isolation device; finally selecting vibration isolators of appropriate stiffness to form the vibration isolation device composed of vibration isolators of different stiffness for isolation and buffering for the electronic device. The vibration isolation device for the electronic product can effectively avoid the vibration coupling effect and greatly improve the anti-vibration and anti-shock performance of the electronic device. Therefore, the design technology such as the design method and idea of the vibration isolation device for the electronic product is reasonable and feasible, can be popularized and applied to the field such as other military and civilian products and has good popularization and application prospects.

A high frequency latch comprising a latch and a plurality of buffers coupled to peak load circuitry produces a peak response at a desired frequency of operation as well as isolating each high frequency latch output of a plurality of outputs to substantially reduce the effects of a kickback signal coupled into the latch output. The peaked load circuitry comprises selectable resistive elements and selectable capacitive elements coupled as a high pass filter to change the bias on a saturation region MOSFET configured as an active load. The high pass filter produces positive feedback on the saturation region MOSFET to increase the bias at high frequencies thereby producing an increased response at a desired operating frequency.

The invention discloses a peak detection method for comprehensive two-dimensional chromatographic separation, which belongs to the field of analytical chemistry. The method is based on the peak detection of the original one-dimensional separation chromatographic peak and the peak reconstruction on the two-dimensional separation plane to complete the comprehensive two-dimensional separation of the chromatographic peak detection. The detection of one-dimensional chromatographic peaks first improves data quality through smoothing and background subtraction, pre-defines the number of divisions of the chromatographic peak response interval, and completely cuts the original chromatogram, based on the intersection point of the response line and each chromatographic peak, and user-defined The threshold of the number of peak points and the unimodal characteristics of the chromatogram are used to find the chromatographic peak apex and retention time position, and by changing the number of response divisions and its influence on the peak detection results, the final one-dimensional peak detection result is obtained; the peak weight of the two-dimensional separation surface Based on the peak detection results and experimental conditions of one-dimensional separation, including tuning time and sampling frequency, and the retention time shift of chromatographic peaks in two-dimensional separation, the adjacent one-dimensional chromatographic peaks that meet the preset conditions are fused to calculate Average retention time, record and output chromatographic peak detection results for comprehensive two-dimensional separation.

A transmit-receive radar system having multiple sub-apertures aligned in an offset, off-centered cross pattern that allows for searching of a sub-aperture pattern for the peak response without having to retransmit beams. The placement of the physical apertures combined with the use of MIMO operations provides a non-uniform distribution of virtual sub-apertures that suppresses ambiguous grading lobes and maintains angle resolution in a manner equivalent to that of non-MIMO approaches. As a result, target detection is enabled within a significantly larger angular area than in a non-MIMO configuration.

A method for improving the signal to noise ratio of an EEG signal in which a wavelet packet decomposition having a plurality of levels is first applied to a time slice of the EEG signal. A default signal is set to the first wavelet packet and a default peak response is then calculated for the first wavelet node. An update signal is set to the default signal combined with another of the wavelet nodes and an update peak response signal is then calculated of the update signal. If the update peak response signal exceeds the default peak response, the default peak response is set equal to the update peak response and the default signal is set equal to the update signal. Otherwise, the value of the current node is set to zero which effectively eliminates the signal data of the current wavelet node. These steps are reiterated for all of the wavelet nodes and, thereafter, a composite waveform of the EEG signal is reconstructed from the non-zero wavelet nodes.

A biosignal measuring device that can include at least one Super-conducting Quantum Interference Device (SQUID) array (SQA) of High Temperature Superconducting (HTS) Josephson Junctions (JJs). The HTS JJs operating parameters can be adjusted to establish an anti-peak response for the SQA, that can be at a maximum along a defined response axis, for detection of extremely small biomagnetic fields. For operation, the SQA can be maneuvered around a target area of a stationary subject that is emitting biomagnetic signals using a stand with three degrees of freedom, so that the response axis remains orthogonal to the subject target area. The device can further include a radome with an atomic layer deposition (ALD) window on the radome surface. The radome ALD surface can allow for passage of magnetic signals through the ALD window and radome, while simultaneously preventing passage of infrared radiation therethrough.

The invention discloses a Raman spectrum based online concentration detection method of an L-arginine-alpha-oxoglutarate solution. The method comprises the following steps: 1) preset parameters of a Raman spectrometer are set; 2) a Raman spectrum of a pure solvent is measured and the Raman spectrum is set as the measurement background; 3) the Raman spectrum of a sample to be tested is measured, and spectral data are preprocessed; 4) whether there is a Raman peak within the wave-number range of 990-1030 cm<-1> is judged; if there is no Raman peak, the liquid to be tested contains no L-arginine-alpha-oxoglutarate; if there is a Raman peak, whether there is a Raman peak within the wave-number range of 850-870 cm<-1> is judged; if there is no Raman peak within the wave-number range of 850-870 cm<-1>, the liquid to be tested contains L-arginine-alpha-oxoglutarate; and 5) the correlation between Raman peak response value and concentration is established respectively through an external standard method, and content of L-arginine-alpha-oxoglutarate in the solution is analyzed. The method of the invention has the following advantages: detection time is short; operation is simple and convenient; and real-time analysis of each component to be tested can be realized.