90 results about "Sample length" patented technology

The invention is an apparatus used for measuring flexible material flexural fatigue, with property of being consisted of crank block rack mechanism, force and displacement sensor, upper and lower cartridge, optical plummet centering system, up-and-down and rotation driving system and control circuit, program and signal collection system, finishing measurement of fixed point flexural fatigue and relaxation creep behaviour of flexible material with stationary load and stretch effectively and accurately. The index property measured are endurance failure time, endurance limit strength and limiting strain, relaxation time, sample thickness or diameter. The apparatus has simple but practical structure, convenient installation and replacement, many tunable parameters containing sample length, fixed points position and their distance, bending rotational angle and angular frequency, original load and stretch, accurate measurement, and can avoid influence of move of application point in bending, offset of sample and vibration.

A biopsy device having a sample size control assembly for selecting the specimen size to be collected. The sample size control assembly includes a rotatable nose on the exterior of the biopsy device for actuating the operation of the sample size control assembly. A needle assembly of the biopsy device can extend through the rotatable nose. A tip protector can be coupled to the sample size control assembly, and can be engaged by a user to operate the sample size control assembly. Also disclosed is a method for making a biopsy device, including coupling a tip protector to a sample size control assembly.

The present invention provides a substrate with a transparent conductive layer comprising at least one layer stacked on a supporting substrate, wherein the surface of the transparent conductive layer has a distribution of inclination arctan (df/dx) in the range of sampling length dx between 20 nm and 100 nm when a distance of the surface of said transparent conductive layer from the surface of said supporting substrate is regarded as f being a normal distribution having a kurtosis of −1.2 to 0.5 around 0° and a standard deviation of 20° to 55°, and a photovoltaic element using the substrate. The substrate can be produced at a high yield and a low cost suitable for practical use and has a high reliability. In addition, a photovoltaic element having a high photoelectric conversion efficiency is obtained when the substrate is used in manufacturing it.

A method of generating parameters representing Head-Related Transfer Functions, the method comprising the steps of a) sampling with a sample length (n) a first time-domain HRTF impulse response signal using a sampling rate (fs) yielding a first time-discrete signal, b) transforming the first time-discrete signal to the frequency domain yielding a first frequency-domain signal, c) splitting the first frequency-domain signal into sub-bands, and d) generating a first parameter of the sub-bands based on a statistical measure of values of the sub-bands.

The invention relates to a high precision strip rolling thickness control method based on feedback signals from a thickness gauge, belonging to the technical field of automatic control of strip rolling. The method comprises the following steps: step 1, inputting rolling system data and strip data; step 2, determining the proportionality factor K of the thickness-control object; step 3, setting a tracking length of the strip sampling; step 4, carrying out multipoint acquisition on the thickness difference delta h measured value of the length Ls(i) of each strip sampling by a computer; step 5, determining delta s(i). The invention has the advantages of proposing length tracking of strip sampling, solving the problem that delay time changes with rolling speed in traditional methods, applying Smith predictive control method to monitoring AGC system, giving the control rate when the controller is under the integrated form; therefore, compared with the traditional control method, the invention not only has rapid response speed, but also has higher static control precision, so the invention can be widely promoted to strip rolling factories to improve the thickness and precision of strip products.

The invention relates to a reciprocating type sampling method for gas content fixed-point sampling. The method comprises the following steps: 1) performing segmental drilling on a hollow drill rod ofwhich the front end is fixed with a coal core pipe according to a predetermined drilling path; 2) arranging a sealing air bag connected with an inflation pipeline at a front end opening of the coal core pipe when the hollow drill rod is drilled to sampling predetermined depth, pushing the coal core pipe into the front end of the hollow drill rod along an inner hole of the hollow drill rod and fixing the coal core pipe, drilling the hollow drill rod again to sampling length to ensure that a coal sample enters into the coal core pipe, inflating the air bag arranged at the front end of the coal core pipe by utilizing the inflation pipeline, and then sealing the front end of the coal core pipe after the air bag is expanded; 3) taking out the sealed coal core pipe along the inner hole of the hollow drill rod, deflating the air bag and taking the coal sample out of the coal core pipe, and carrying out fixed-point sampling. According to the reciprocating type sampling method and device, the gas content fixed-point sampling efficiency and precision of a coal layer can be greatly improved, and the gas content testing accuracy is improved.

A creep tester for a precise and accurate creep test includes a movable actuator capable of loading corresponding to change in length of a specimen, a cam actuator operated in association with the movable actuator, and a self weight actuator. The movable actuator includes upper and lower spherical adjusting seats to hold upper and lower portions of the specimen, a spring disposed on the upper spherical adjusting seat to correspond to a minute deformation of the specimen, upper and lower movable tables respectively contacting the spring and the lower spherical adjusting seat, a load cell and a stationary table disposed on the upper movable table, and a movable loading table disposed below the lower movable table to apply a predetermined load to the specimen. The creep tester can perform a precise creep test by continuously applying a constant load without supplementation of hydraulic pressure.

A/D converter or as a D/A converter forms a data converter embedded in a digital circuit for reconfigurable use. Conversion parameters of the data converter are controlled on a bitwise basis from a bitwise converter configuration register. For instance, output locations (i.e., time slots) of the data converter are determined by a bitwise converter configuration register, as is the selection of a D/A conversion mode or A/D conversion mode of the data converter for that particular output location, and/or the output sample length are controlled by appropriate signals from the bitwise converter configuration register. The bitwise converter configuration register also preferably configures the input source to the data converter and/or to an interface, e.g., to a parallel-to-serial, serial-to-serial, or parallel-to-parallel interface device, on a bitwise basis, to provide flexibility both in the source of the channels as well as the output location of particular channels in the data frame.

The invention discloses a neural network-based human body movement recognition method. The method includes the following steps of based on a video database, training N mutually independent 3D convolutional neural networks as a video feature extractor; according to the video feature extractor, training a multi-instance learning classifier; inputting a to-be-recognized video, extracting video features through the well trained network, and classifying movements by the classifier. According to the technical scheme of the invention, the influence of a large amount of noise features on a classification result is avoided. Meanwhile, the negative effect of a fixed sample length on a movement recognition result is also avoided.

An x-ray diffraction measurement apparatus for measuring a sample, having an x-ray source and detector coupled together in a combination for coordinated rotation around the sample, such that x-ray diffraction data can be taken at multiple phi angles. The apparatus may provide a pole figure representation of crystal orientation of the sample, wherein the pole figure represents the crystal alignment, and a full width half maximum value is calculated from the pole figure for crystal alignment quantification. Data may be taken at discrete positions along a length of the sample, and the sample is in a fixed position during measuring; or data may be taken continuously along a length of the article, as the sample continuously moves along its length in a movement path between the source and detector. The sample may be in the form of a tape, linearly passing through a measurement zone.

The invention discloses a calculation method of dielectric power factors of high-voltage electrical equipment. The method comprises that first direct current components of voltage and current signals are eliminated within the time domain, then fundamental frequency of electrical signals is accurately calculated according to the energy moment theory, then the primary signals are calculated in an interpolation mode according to a three-bending moment method, and complete alternation resampling is conducted, and last, the sample length of complete alternation is fast calculated in a Fourier mode to acquire phase included angles of fundamental wave voltage and fundamental wave current, tangents of other angles are acquired, and the dielectric power factors are acquired. The calculation method of the dielectric power factors of the high-voltage electrical equipment has the advantages of being not only capable of achieving accurate calculation of the dielectric power factors of the high-voltage electrical equipment, but also capable of accurately acquiring phase included angles between subharmonics of voltage and current signals, and detecting quality of electric energy by accurately measuring quality of the electric energy of the electrical signals.

A method of using a gear measuring center to measure and evaluate gear surface roughness is disclosed. On a gear measurement center, a roughness sensor probe and correlation data processing software are combined and used so as to realize a measurement and evaluation method of gear surface roughness. A measurement direction belongs to involute profile direction measurement, and a top clamping modeis adopted so that a problem caused by manual adjusting needed by stylus coarse positioning is avoided. Under a generative movement condition of the gear measurement center, a stylus only carries outrectilinear motion along with bending of a gear surface. A gear-surface uniformly-spaced sampling principle is used to carry out sampling and acquired traced profile discrete points are uniformly andequally spaced. During a roughness measurement process, sampling lengths and evaluation lengths of a measurement position, a measurement result and an evaluation process are selected equivalently, a corresponding method and a data table are given, actual operation is convenient and measurement precision is guaranteed, problems that uniform sampling, reasonable evaluation and the like can not be realized on a gear surface are avoided and a technical problem that gear surface roughness analysis and evaluation can not be performed is solved.

The invention discloses a determination apparatus and method for the comprehensive properties of a heat-shrinkage film, belonging to the field of testing technology. The determination apparatus comprises a base, sample clamps, a constant temperature control device, a sample length adjusting device and a control system. The determination method comprises the following steps: sample preparation; sample fixation; testing; etc. The determination apparatus and method provided by the invention are directed at the material characteristics of the heat-shrinkage film and particularity of a heat shrinkage force testing environment of the heat-shrinkage film, utilize constant-temperature water bath for heating to allow the heat-shrinkage film to be uniformly heated, and are stable and reliable in results; A lifting device is used for adjusting the working condition of a sample and the sample length adjusting device is used for adjusting distance between the sample clamps, so the determination apparatus and method can test the peeling strength of samples of different lengths and the heat shrinkage force of the samples of different lengths under different temperature conditions; meanwhile, cold shrinkage force can be tested during testing of the heat shrinkage force, so a testing scope is greatly broadened; moreover, the clamps can be replaced for testing of expansibility or restoring force, so testing of more properties of the heat-shrinkage film is realized.

This invention relates to a large rock structure face mechanics and hydraulics property value fetch method including the following steps: uniformly arranging two test section of 10cm and 30cm demanded by statistics corresponding to the required measurement directions on a small size rock and plotting profile curves of the above mentioned section, measuring the fluctuation amplitudes of the profile curves, computing the factor value of each section roughness to compute the desired values based on the roughness factor E(JRCo), E(JRC30), obtaining D30 of JRC diameter effect to be substituted into a related JRC effect rate formula to get the Ln-f relationship map, when f=50%, the related sample length on Ln-f curve -the roughness efficiency is Ln taken as the substitution formula of rock structure face mechanics and hydraulics property value fetch.

The invention relates to a clamping device for rapidly replacing cutting blades, which comprises a sample fixing mechanism, a movable cutter adjusting mechanism and a fixed cutter adjusting mechanism. Thickness, tooth shape and the like of a movable cutting blade and a fixed cutting blade are optionally selectable, and an open angle between the movable cutting blade and the fixed cutting blade isvariable along with different replaced positioning blocks. The distance between the sampling fixing mechanism and each of the movable cutter adjusting mechanism and the fixed cutter adjusting mechanism can be adjusted according to the sample length, and then the sampling fixing mechanism, the movable cutter adjusting mechanism and the fixed cutter adjusting mechanism can be fixed onto an operation table of a universal testing machine with a T-shaped groove through bolts for the T-shaped groove. Using the clamping device can conveniently solve the problem of influences of factors such as thickness and sliding cutting angle of the cutting blades, the open angle between the cutting edges of a movable cutter and a fixed cutter, different cutting edge shapes and the like on cutting performanceof the cutting blades. Further, the clamping device for rapidly replacing cutting blades has the advantages of simple structure, easiness in mounting, convenience and rapidness in cutting blade adjustment, safety, reliability and the like.

The invention relates to an underwater fishing method based on machine vision, and the method comprises the steps: monitoring the growth condition of fishes in real time through the cooperation of anunderwater fishing device and the steps of fish recognition and classification, fish length measurement and weight prediction, and accurately mastering the optimal fishing period; wherein the fish identification classification comprises image acquisition and preprocessing, wavelet feature extraction and BP neural network fish image classification, and the fish length measurement and weight prediction comprises fish sample length and weight parameter acquisition, fish length information extraction, length error compensation and weight prediction. The underwater fishing method based on machine vision has the advantages that fishes of specific types and specific sizes can be captured, meanwhile, the weight of the fishes can be estimated, the growth condition of the fishes can be monitored inreal time, and the optimal fishing period can be accurately mastered.