46results about How to "The judgment result is accurate and reliable" patented technology

The invention provides a method for detecting steel tube void of concrete filled steel tube (CFST) arch bridge by utilizing a transient impact method; the method provided by the invention is characterized by comprising the following steps: 1, arranging measuring points, axially arranging a plurality of measuring points at the outer wall of a steel tube which is made of a CFST and is to be detected, and placing an acceleration transducer on each measuring point; 2, arranging a vibration excitation point at the outer wall near to the head end or tail end of the steel tube, horizontally knockingthe vibration excitation point by a vibration excitation device, and detecting the acceleration response signals of the measuring points by the acceleration transducer; 3, outputting the response signals of the measuring points by the acceleration transducer, inputting the signals into a data collector by a signal amplifier, obtaining the natural frequency and acceleration power spectral density of each measuring point by the data collector, and storing in a computer. In the invention, the steel tube void of the CFST arch bridge can be located fast and exactly according to the natural frequency and power spectral density of acceleration response and via calculating and comparing the acceleration spectral energy values of the measuring points based on an expression.

The invention relates to the field of image identification and discloses a method and a system for determining turning-on or turning-off of a switch. The method comprises the following steps of: acquiring images from a plurality of characteristic regions; performing edge extraction, and solving edge gradient histogram data; judging whether the edge gradient histogram data is matched with sample data; and determining the turning-on or turning-off of the switch according to the number of the matched characteristic regions. The invention has the advantages that: a judgment result is accurate and more stable; by using the turning-off state of the switch as a comparison reference, a stable and accurate comparison result is easier to obtain; and the characteristic regions are rectangular frames with simple background preferably and comprise the straight-line characteristics of the switch.

A method for judging the internal stability of coarse-grained soil comprises the following steps: (1) performing a particle size analysis test on a coarse-grained soil filler to obtain a grading feature particle size d3 of the filler, and measuring the moisture content and the particle density of the filler; (2) performing compacting according to a set density of the coarse-grained soil filler toform coarse-grained soil, determining the porosity n of soil, and measuring the permeability coefficient of the filler under the porosity n by means of a constant head permeability test; and (3) calculating the equivalent permeability average pore diameter D according to the porosity n and the permeability coefficient K of the coarse-grained soil; and (4) comparing D with d3 to obtain the judgmentresult of the internal stability of the coarse-grained soil under the porosity n. The method is definite in principle, and simple and convenient to operate and calculate, can accurately judge the internal stability of the coarse-grained soil by use of conventional geotechnical test equipment, and provides reliable references for evaluating the structural stability of a geotechnical material.

The invention relates to the technical field of molecular organisms, and discloses a universal primer and a nucleotide sequence of three types of humanized tapeworm ep45 genes as well as an identification method of three types of humanized tapeworm. The primer comprises an upstream primer disclosed as SEQ ID NO:1 and a downstream primer disclosed as SEQ ID NO:2, wherein the SEQ ID NO:1 is 5'-AGAGACAAAGGAAAGGCAGCTG-3', and the SEQ ID NO:2 is 5'-GGGGCTCAGGCACCTTGAT-3'. According to the implementation way of the invention, the universal primer of the three types of humanized tapeworm ep45 genes is designed, RT-PCR amplification is carried out to obtain the tapeworm ep45 gene segments; then, according to the difference of a restriction enzyme locus among the three types of ep45, EcoR I and/or Aar I are used for carrying out enzyme digestion processing, the three types of humanized tapeworms are interspecific authenticated according to a difference (one/two/three stripes) for enzyme-digested product electrophoresis to generate an atlas, PCR product sequencing authentication time is greatly shortened, and in addition, a judgment result according to an enzyme digestion atlas is more accurate and reliable.

The invention provides a method for judging the optimal tunneling speed of a roadway with a outburst dangerous coal seam. The stress distribution curve graph and the gas pressure distribution curve graph in the front coal body under different tunneling speeds of the roadway are obtained through on-site observation, and the function relation formula between the stress magnitude and the gas pressuremagnitude in the front region of the stress peak in the front coal body of the roadway and the distance from the tunneling working surface of the roadway is obtained through a regression analysis method. According to the function relation, the energy source of coal and gas outburst is obtained by integral method, and the energy consumed by coal breaking and moving is determined. Finally, the ratio of the energy source of coal and gas outburst to the energy consumed by crushing and moving of the coal body under different tunneling speeds of the roadway is obtained. Among the roadway driving speeds corresponding to all ratios less than 1, the fastest roadway driving speed is the best roadway driving speed with outburst dangerous coal seam. The method has the advantages of simple application, low investment cost, convenience in use, reliable judgment result and the like.

The invention relates to the field of vinegar brewing and particularly provides a detection and determination method for solid acetic acid fermentative substrate forming during vinegar brewing, and solves the problems that a method in the prior art has large difference in determination results, is liable to cause mis-determination and consumes much time and labor intensity. In the method, sensorydetermination and physical and chemical index detection determination are combined, comprising color, appearance, temperature, content of acetaldehyde, and acidity of the vinegar fermentative substrate. The method includes steps of: during determination, allowing the vinegar to stand and observing the vinegar liquid according to the following indices: the vinegar liquid has a red-brown color, is glossy, clear and transparent and has homogeneous status, and the central temperature of a middle layer of the vinegar fermentative substrate is reduced to lower than 40 DEG C; performing acetaldehydedetermination according to the following indices: display value of content of acetaldehyde is 0-80 ppm, and after pouring, the result is still not more than 80 ppm after 3-4 h; on the basis of the three conditions hereinabove, measuring the acidity of the vinegar fermentative substrate every 4 h, if the change is smaller than +/- 0.1, determining the fermentative substrate is formed. The method can increase fermentative substrate quality and productivity, can avoid incomplete fermentation and acetaldehyde conversion, low productivity of the vinegar and strong acetaldehyde smell in the vinegar.The method is simple and achieves scientific determination on the terminal, and is beneficial to standardization of production of vinegar.

The invention discloses a traditional Chinese medicine production place discrimination system and method based on soil parameters. The system comprises an input measurement module which obtains traditional Chinese medicine type information inputted by a user, measures soil scraped from traditional Chinese medicines, and obtains a soil measurement result; an identification and judgment module used for acquiring the traditional Chinese medicine type information and the soil measurement result, performing preprocessing and feature selection on the soil measurement result, and performing discriminant analysis on the data after preprocessing and feature selection through a pre-constructed neural network model, a linear discrimination model and an XGBoost model, and obtaining production place distinguishing results of the corresponding types of traditional Chinese medicines; and a feedback module used for outputting a production place judgment result. According to the system, the traditional Chinese medicine production place is judged by measuring parameters of soil attached to the traditional Chinese medicines, the relation between the soil parameters and the traditional Chinese medicine production place is constructed through the neural network model, the linear discrimination model and the XGBoost model, production place discrimination is more convenient and efficient, and the determination result is more accurate and reliable.

The invention relates to a forming limit testing method which comprises the following steps: S1, designing a stamping deformation structure on a metal pole plate, including three types of a straight runner structure, a circular truncated cone structure and a bulging structure, and determining critical dimension parameters; s2, respectively selecting values of an upper bend inner circle radius r1 and a lower bend inner circle radius r2 as calculation base values, selecting a plurality of groups of key dimension parameters, and obtaining a maximum thinning rate through finite element simulation; determining the ratio alpha of the secondary strain to the main strain; s3, using a stamping device for stamping on the sample plate to form a corresponding stamping deformation structure, and obtaining a forming limit sample; s4, performing section observation and measurement on the stamping deformation structure on the forming limit sample, judging whether cracking or necking or local thinning occurs or not, obtaining a strain parameter set through calculation, and obtaining a cracking point, a necking or local thinning point and a safety point; and S5, drawing all the cracking points, the necking or local thinning points and the safety points to obtain a forming limit diagram.

The invention relates to a method for determining whether a medicine is pure natural or not. The characteristics are that testing method of is adopted. First, C14 contained in unit weight of carbon in known pure natural medicine is measured, supposed as A. Then, C14 contained in unit weight of carbon in medicine to be determined is measured, supposed as B. If value A is equal to value B or they are closed each other, then the latter is a pure natural medicine. If value A is far larger than value B, then the latter is not a pure natural medicine, and the ratio of synthetical material and natural material can be calculated out. The invented method can be used to determine whether a material is pure natural or not such as Chinese medicine, Wester medicine, food for additive health care food and flavoring.

The invention discloses a machine head turnover protective device of a sewing machine. The machine head turnover protective device comprises a motor controller and a position sensor connected with themotor controller; the position sensor is used for detecting the relative position between the machine head and a platen in real time and generating position information to be fed back to the motor controller; the motor controller judges whether the machine head is turned over or not according to the position information, and if the machine head is turned over, controls a main shaft driving motorto stop operating; compared with a condition that the machine body is not turned over, when the machine body is turned over from the platen, the relative position between the machine head and the platen is changed for sure, and the motor controller judges whether the machine head is turned over or not according to the position information; and therefore by virtue of the machine head turnover protective device provided by the invention, machine head turnover can be detected in time through the position sensor and the motor controller, and protection can be performed, the reliability is relatively high, and the safety performance of the sewing machine is relatively high. The invention also discloses a sewing machine comprising the machine head turnover protective device.

The invention discloses a judgment method of the weaving mode of a conductive fabric and the type of conductive yarn. The method includes the steps of laying the to-be-detected fabric on a tabletop atfirst and utilizing a universal meter to randomly measure the resistance of different continuous parts of the to-be-detected fabric in the warp direction and the weft direction; then, clipping the to-be-detected fabric into strip-shaped samples and fixing the two ends of each fabric sample; placing the fabric samples on a judgment device, conducting data collection according to resistance/currentchanges of the to-be-detected fabric samples during constant-speed stretching and obtaining a relational graph between the resistance/current and time or between the resistance/current and stretching; according to the features of the relational graph, judging the weaving mode of the to-be-detected fabric and judging the type of the conductive yarn. The judgment device involved in the judgment method includes the fabric samples, wherein the two ends of each fabric sample are fixed and clamped by electrodes; the fabric samples are connected with a switch, a standard resistor and a DC power source in series, the standard resistor is connected with low-pass filtering in parallel, and the low-pass filtering is electrically connected with a data collecting device and a PC. The weaving mode of the fabric can be judged quickly and accurately, and the type of the conductive yarn in the fabric is also judged.

The invention discloses a direct-current grounding electrode electrical variable measurement system and a state evaluation method. The direct-current grounding electrode electrical variable measurement system comprises a direct-current grounding electrode measurement module, a portable data receiving module, a first communication module, a state evaluation module, a second communication module, aserver module and a query module. According to the invention, analysis is carried out from two aspects of safety assessment of the DC grounding electrode and safety assessment of the surrounding environment of the DC grounding electrode, a comprehensive evaluation method for the state of a direct-current grounding electrode is provided, the operation state of the grounding electrode is comprehensively judged by utilizing a plurality of characteristic parameters, efficient optimization of measurement data transmission can be realized in a severe operation environment, and parameters are greatlyreduced in the aspect of calculating the data transmission stability rate of the communication node in the operation time of the whole direct-current grounding electrode measurement process.

The invention relates to the technical field of agricultural intelligent irrigation, and provides a soil plowing detection and judgment method. The method comprises the following steps: acquiring the volumetric water content of farmland soil with a preset depth in the irritation process, recording the acquisition time, determining the effective time quantum from irritation beginning to the change of the volumetric water content of the farmland soil according to the volumetric water content of the farmland soil and the acquisition time, and judging that soil plowing is needed if the effective time quantum is longer than a threshold time; and calculating the water seepage speed of the farmland soil in the predetermined time quantum after the change of the volumetric water content of the farmland soil if the effective time quantum does not exceed the threshold time, obtaining the compactness of the soil according to a relationship between the known water seepage speed and the compactness of the soil, and judging that the soil plowing is needed when the compactness of the practical soil is greater than the compactness required by crops in the soil. The soil plowing detection and judgment method allows soil plowing or not to be rapidly and effectively judged.

The invention discloses a method for online judging the starting and stopping state of a thermal power generating unit. The method comprises the following steps: acquiring an organization set of an SIS which is included in a unit start-stop state supervision range; obtaining a latest unit maintenance standby application list of each unit in the organization set; traversing all units in the organization set, judging the start and stop states of the units in combination with the latest unit maintenance standby application form list, writing the start and stop states of the units into a unit state table of the SIS system relational database, and writing criteria into an alarm criterion table; and after the task is executed, waiting for the start of the next task cycle. According to the invention, high-accuracy and high-timeliness automatic judgment and monitoring of the start-stop state of the unit can be realized, and the judgment basis of the start-stop state of the unit is recorded.

The invention provides a method and a device for judging the refrigerant recovery completion condition and an air conditioner, and relates to the technical field of air conditioners. The judgment method comprises the steps of obtaining an indoor environment temperature, and determining a first judgment condition and a second judgment condition according to the indoor environment temperature; obtaining an initial weight of an outdoor unit before refrigerant recovery starts, and determining a third judgment condition according to the initial weight; obtaining an initial air outlet temperature of an indoor unit when refrigerant recovery starts, and obtaining a real-time air outlet temperature in the refrigerant recovery process; under the condition that the indoor environment temperature, the initial air outlet temperature and the real-time air outlet temperature meet the first judgment condition, controlling the indoor unit to reduce the air gear rotating speed; under the condition that the real-time air outlet temperature before and after the air gear rotating speed is reduced meets a second judgment condition, obtaining a real-time weight of the outdoor unit; and under the condition that the real-time weight and the initial weight meet a third judgment condition, judging that refrigerant recovery is completed. The judgment method provided by the invention can accurately judge whether the refrigerant is completely recovered or not.