15685results about "Withdrawing sample devices" patented technology

The invention relates to the field of water resource quality detection, in particular to a sampling device for water resource quality detection. The invention provides a water resource quality detection sampling device which comprises a sampling barrel, a barrel cover is arranged at an opening of the sampling barrel, clamping seats are symmetrically distributed on one side, close to the barrel cover, of the sampling barrel, clamping pins are arranged in the clamping seats, the barrel cover is locked through cooperation of the clamping pins and the clamping seats, and the sampling barrel is connected with the clamping seats. A plurality of sampling box bodies for containing water samples are vertically arranged in the sampling barrel, a water pump is arranged in the sampling barrel, and a water inlet pipe of the water pump extends to the outer side of the sampling barrel. The stratified sampling box body and the independent flow guide assembly are combined with the servo motor to drive the staggered box cover, so that accurate stratified collection of water samples at different depths is realized, and mixed pollution is avoided; a water flow switching assembly is additionally arranged, a pipeline is automatically flushed after sampling, a residual water sample is discharged into a liquid storage box, cross contamination is reduced, independence and representativeness of the water sample are guaranteed, and detection accuracy is improved.

The invention belongs to the technical field of geological exploration, particularly relates to a high-adaptability multi-type geological exploration sampling device and an accurate sampling method.The high-adaptability multi-type geological exploration sampling device and the accurate sampling method aim to solve the problems that a drill bit is stuck and stratified sampling is difficult, and the high-adaptability multi-type geological exploration sampling device comprises a base, a vertical plate, a lifting plate and a driving cylinder with the drill bit; a first annular groove is formed in the outer wall of the driving cylinder and matched with the first circular ring, downward-pressing drilling and upward-lifting resetting of the drill bit are achieved, a second annular groove is formed in the drill bit, and the flow direction of hydraulic oil is controlled through a second circular ring connected with a fixing rod; during lifting, hydraulic oil is injected into the second hydraulic channel, the trapezoidal collecting box extends out to scrape hole wall samples, the electromagnet and the iron block are matched to adjust the position of the second circular ring, the working states of the teeth and the collecting box are switched, drill bit jamming is reduced, hole wall sampling at any depth is supported, and exploration efficiency is improved.

The invention discloses a river sediment multi-parameter sensing self-adaptive sampling method and system, and relates to the technical field of environment monitoring, and the method comprises the following steps: S1, synchronously collecting the pH value, electrochemical potential, heavy metal binding state proportion, water body flow velocity and hydrodynamic parameters of sediment through a sensing device, and establishing a multi-parameter response baseline; and S2, based on the multi-parameter response baseline, collecting monitoring data in real time and executing differential analysis, and identifying a high-risk time period when the pH value change rate exceeds a threshold value and the heavy metal binding state proportion fluctuates. By constructing a multi-parameter response baseline and a linkage recognition mechanism, early sensing and accurate sampling of heavy metal release are realized, a closed-loop response system is constructed by combining chemical form analysis, self-correction and data feedback optimization recognition model, and the accuracy and intelligent level of pollution monitoring are improved.

The invention provides a coal impact tendency evaluation method which comprises the following steps: sampling a coal rock material on an engineering site, and processing the sample into a coal rock test piece with a preset size and a preset shape; carrying out a uniaxial compression experiment on the coal rock test piece, and recording a motion image of an ejection body on the coal rock test piece in the loading process of the coal rock test piece; comparing cosine similarities among the plurality of images in the moving images, and determining the image with the maximum damage degree according to the cosine similarities; analyzing gray level distribution of the image with the maximum damage degree to obtain a gray level histogram; identifying particle information of the broken particles in the image with the maximum damage degree; representing the damage degree of the coal rock material by using the particle information of the crushed particles; and evaluating the coal impact tendency by using the damage degree of the coal rock material. According to the evaluation method for the coal impact tendency disclosed by the invention, a new coal impact tendency evaluation index is provided, the research on the damage process of the coal rock material is perfected, and basic parameters are provided for subsequent early warning of damage of the coal rock material.

Systems and methods are provided for targeting one or more features in a region of interest, and efficiently removing the features from an array of features. The systems and methods can remove one or more beads that contain analytes, intermediate agents, or a combination thereof, from the region of interest of a substrate by emitting light toward the beads on the substrate.

The invention relates to the technical field of gas sampling, in particular to a gas in-situ sampling device suitable for a medium-high temperature geothermal field, the core of the gas in-situ sampling device is a sealed cabin, and the sealed cabin is internally integrated with a pressure stabilizing and separating unit which comprises a gas-liquid separating chamber with a lower inlet and an upper outlet so as to realize gas-liquid separation by utilizing gravity settling; at least one forevacuum sampling bottle for containing samples and at least one purging bottle pre-filled with high-pressure inert gas are arranged on the disc type magazine; the rotary positioning module is used for rotating the disc type magazine so as to align the bottle opening of the sampling bottle or the purging bottle to the outlet of the pressure stabilizing and separating unit; and the linear butt joint module is used for pushing the selected sampling bottle or purging bottle, so that the bottle opening of the selected sampling bottle or purging bottle is in butt joint with the outlet of the pressure stabilizing and separating unit. According to the embodiment of the invention, through cooperative operation of the rotary positioning module and the linear docking module in the sealed cabin, automatic operation of single-time well descending and multiple sampling is realized.

The invention relates to a soil detection system and a detection method. Soil detection equipment comprises a sampling module, a positioning module for generating original point sampling coordinates, a sample treatment module for chemical, electrochemical and biological treatment means, a detection module, a detection database, a detection control module, a generating and sending module and a sending and receiving module. The detection method comprises the steps of sampling and processing, binding coordinates, comparing abnormal data through preliminary detection, generating a pollution map, carrying out secondary detection on abnormal data, calculating a spatial uncertainty index, dynamically generating a near-origin secondary sampling coordinate, circularly sampling and detecting until the index reaches the standard or the density upper limit, and finally generating the pollution map and a prediction model. And the detection database is updated and optimized through machine learning.

The invention relates to the related technical field of dust detection, and provides a mining induced charge and light scattering fusion dust detection device and method.The dust detection device comprises a workbench, a sampling assembly and a detection assembly, and the sampling assembly comprises a sampling air pump, a conical airflow homogenizer and a closed sampling cavity; the detection assembly comprises an annular sliding rail, a light scattering detection module and an electrostatic induction detection module; the dust detection method comprises the following steps: S1, device initialization and zero calibration; s2, sampling preparation of dust-containing airflow; s3, dual-module synchronous signal acquisition; s4, data processing and temperature and humidity compensation; s5, carrying out anti-interference protection assembly; and S6, data fusion and result output. S7, device cleaning and standby; through cooperative work of the double detection modules, dust detection signals in different concentration intervals are accurately captured, wide-range coverage from low concentration to high concentration is achieved, and synchronous monitoring of dust concentration and particle size characteristics is achieved.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses a fine processing mixed bed failure situation situation sensing system and method, the sensing system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Situation awareness of mixed bed failure is achieved by establishing a layered monitoring system, and long-term stability of water quality of a water vapor system of a power plant is guaranteed.

The invention discloses a smelting wastewater trace arsenic real-time monitoring method based on an electrochemical sensing array, and relates to the technical field of electrochemical detection.The method comprises the steps that bypass sample flow is established through a peristaltic pump and pre-filtered, and stable sample flow is obtained; the sample flow is divided into a first passage and a second passage, and a form distinguishing sample flow is obtained after oxidation setting and medium equalization; performing short-time adsorption equilibrium to obtain an interface state parameter set, executing multi-segment coded deposition control based on the parameter set, and collecting a dissolution current curve; a dissolution signal set is obtained by applying single-frequency perturbation signals, characteristic peak parameters are extracted and subjected to correlation calculation with a multi-section response matrix, the total arsenic concentration and the pentavalent arsenic concentration are calculated through a weighted inversion algorithm, and a confidence interval is obtained; and calculating the concentration of the trivalent arsenic and determining an uncertainty range according to the two. According to the method, the quality judgment result is linked with the dynamic adjustment of the sampling flow, the potential amplitude and the deposition duration, so that the self-adaptive optimization control of the detection process is realized.

The invention relates to the technical field of sampling devices, in particular to a quantitative sampling valve of a liquid circulation pipeline, which comprises a ball valve, a sampling barrel and a sampling assembly. The sampling barrel is connected with a pipeline through a ball valve. When the ball valve is opened, a sampling channel is formed between the ball valve and the sampling barrel. The sampling assembly and the sampling channel are slidably sealed. The sampling assembly divides the sampling channel into an upper channel and a lower channel. According to the quantitative sampling valve of the liquid circulation pipeline, the ball valve, the sampling barrel and the sampling assembly are arranged to be matched, gas and residual liquid in the upper channel can be discharged back to the pipeline, the situation that a new liquid sample is polluted by previous liquid sample residues is avoided, and the sampling accuracy and representativeness are improved. And after the sampling is completed, the liquid sample is temporarily sealed in the sampling barrel by utilizing the sealing between the sampling assembly and the sampling barrel, so that the liquid sample is prevented from being polluted due to contact with the outside, and the liquid sample is convenient to transfer and store.

The invention relates to the technical field of garden water monitoring, in particular to garden water quality intelligent monitoring equipment which comprises a base, a round basin and the like. A round basin is fixedly connected to the base, and a pull ring is installed on the round basin. By releasing the water outlet pipe and under the gravity action of the counterweight ball, the water pipe vertically moves downwards, then negative pressure is generated in the water pipe, a water sample is extracted through the filtering ball head, impurities in a water area are filtered through the filtering ball head, and therefore the water sample flows along the water pipe, the round pipe, the guide pipe, the water pump and the conveying pipe; and finally, the water flows into the water collecting barrel through the conveying pipe, the extracted water sample is carried by the baffle plate and the flow deflector I together, the monitoring probe is submerged by the water, and then the monitoring probe is controlled to start to operate to detect the water sample, so that the water body in the garden is monitored, and the mode is short in period and high in efficiency, and can meet the real-time requirement.

The invention discloses a switchable graded sampling pre-construction control method for dust and a detection device. The method comprises the following steps: synchronously acquiring data through multiple types of sensors, constructing a condensation risk prediction model, calculating a condensation risk index RI and dividing risk grades; based on the risk level, dynamically adjusting the target power of the heating wire, the blowback period of the air pump and the airflow speed, and cooperatively triggering an electrode cleaning and trapping filter screen switching program; after cleaning is completed, follow-up control parameters are dynamically adjusted; and closed-loop control is formed. According to the method, the temperature and humidity sensor is arranged in the external environment to obtain background parameters, the airflow velocity sensor is used for sensing the working condition change of the air pump, and a dynamic condensation risk prediction model is established, so that excessive heating is avoided fundamentally, and evaporation loss of semi-volatile substances is prevented; therefore, the accuracy of a dust concentration detection result is remarkably improved in an extreme humidity environment.

The embodiment of the invention provides a transformer bushing oil extraction tool system and a control method and device thereof, and the system comprises a multi-degree-of-freedom flexible positioning module, a real-time data collection and feedback control module, an electrical isolation and insulation module, and an intelligent alarm system. Automatic operation of oil extraction of the transformer bushing in an electrified environment can be achieved, the accuracy, the sealing performance and the safety of the oil extraction process are ensured, and the efficiency and the reliability of equipment maintenance are improved. Wherein the flexible positioning module enables the oil taking module to be accurately in butt joint with an oil taking port, the data acquisition and feedback control module monitors and adjusts pressure and flow in real time, and the stability of oil taking is ensured; the electrical isolation module provides necessary insulation protection to avoid high-voltage risks; and the alarm system automatically gives an alarm and stops operation when abnormity occurs, so that multi-layer safety guarantee is provided for system operation.

The invention provides an aerosol simulation system, and the system comprises a micropump array which is used for extracting raw materials in a raw material storage unit, and forming a mixed solution; the micropump array comprises a first micropump and at least one second micropump; the raw material storage group comprises a first raw material storage unit and at least one second raw material storage unit; the control module can control the micropump array to extract a first raw material of the first raw material storage unit at a first pumping speed and extract a second raw material of the second raw material storage unit at a second pumping speed; the atomization module is used for carrying out atomization treatment on the mixed liquid to form aerosol and adjusting the temperature and humidity of the aerosol; and the first pumping speed and the second pumping speed in the control module are adjusted according to the physicochemical properties. The chemical component concentration and physical parameters of the output aerosol are dynamically changed in real time so as to simulate the whole life cycle of a real cigarette from ignition to extinguishment.

The invention relates to the field of sampling facilities, in particular to an assembly type single-walled carbon nanotube material sampling device which comprises a convex-edge shell, two water passing openings are symmetrically formed in the rear portion of the outer surface of the convex-edge shell in a penetrating mode, an assembly part is arranged at the front end of the convex-edge shell, the diameter of the convex-edge shell is matched with the size of a sampling opening in a bent pipe, and the diameter of the assembly part is matched with the size of the sampling opening in the bent pipe. A connecting column is rotationally installed in the middle of the rear end of the convex-edge shell in a penetrating mode, two sealing plates are symmetrically arranged on the rear portion of the outer surface of the convex-edge shell in a tightly attached mode, the outer surfaces of the sealing plates and the outer surface of the convex-edge shell are coplanar, the sealing plates and the water passing openings are arranged in a staggered mode, and the sealing plates are connected with the rear end of the connecting column; and two rotating lugs symmetrically extend from the front end part of the connecting column. According to the device, it is ensured that the site is not polluted in the sampling process, meanwhile, sampling is facilitated, the device can be conveniently assembled with a bent pipe, the device can adapt to assembly of bent pipes with different bending angles, and the applicability is effectively improved.

The invention relates to the technical field of industrial wastewater sampling and discloses an industrial wastewater sampling system.The industrial wastewater sampling system comprises a frame, a connecting frame, a hydraulic cylinder and a rectangular plate, the connecting frame is located in the frame and slidably arranged in parallel, and the bottom of the hydraulic cylinder and the right side of the interior of the connecting frame are fixedly mounted; the upper surface of the rectangular plate and one end of an output shaft of a hydraulic cylinder are fixedly mounted, and a trigger sampling mechanism is arranged in the rectangular plate. According to the industrial wastewater sampling system, when a trigger rod is in contact with the bottom of a canal, a connecting spring and a telescopic rod in a power rebound mechanism are compressed, a third rack is driven to move upwards, a valve switch control mechanism is linked, a first butterfly valve and a second butterfly valve are synchronously closed, and a sampling barrel is sealed; it is ensured that the water sample is captured at the moment when the sampler is stabilized at the target depth and bottom mud is not stirred, and therefore index distortion of suspended solids and adsorptive heavy metal is effectively avoided, and the authenticity of the sample and the accuracy of detection data are improved.

The invention discloses a pneumatic sampling device and method for high-water-content muddy soft soil, and relates to the technical field of dredged sludge sampling devices.The pneumatic sampling device comprises a sampling cavity, a sampling opening is formed in the side wall of the sampling cavity, a flexible sampling container is arranged in the sampling cavity, and the opening end of the flexible sampling container faces the sampling opening; the valve plate is slidably connected to the outer side of the sampling opening; the gas transmission rod is fixed on the sampling cavity and is communicated with the interior of the sampling cavity; the gas path control mechanism is communicated with the interior of the sampling cavity through a gas transmission rod; the pneumatic driving part is arranged on the sampling cavity and is pneumatically connected with the gas path control mechanism, and the driving end of the pneumatic driving part is in transmission connection with the valve plate; wherein the pneumatic driving part can be driven by the gas path control mechanism to drive the valve plate to move to open or close the sampling port, and the gas pressure in the sampling cavity can be changed by the gas path control mechanism, so that the flexible sampling container expands to suck a soil sample, or the flexible sampling container contracts to discharge the soil sample.

The invention discloses a visual three-dimensional test device for grouting reinforcement and effect of a mine boundary coal pillar under a thin unconsolidated formation, and relates to the technical field of similar test simulation equipment for grouting reinforcement of the mine coal pillar. The device comprises a test support, an internal frame, a model storage box, a loading plate assembly, a model cutting mechanism, a vertical loading mechanism, a horizontal loading mechanism, a signal acquisition and processing mechanism, a three-dimensional test model, a coal mining simulation mechanism, a model grouting mechanism, a model separation mechanism and an effect visualization mechanism. According to the coal seam mining simulation mechanism, step-by-step, segmented and controllable excavation of a three-dimensional similar model in a closed space can be achieved, generation, expansion and penetration of coal seam mining roof rock stratum cracks are inverted, and the evolution process of a water guide channel is finally formed. According to the invention, the diffusion and runout characteristics of the grouting reinforcement slurry for the boundary coal pillar of the mine under the thin unconsolidated formation can be truly simulated, and the dynamic process of diffusion, condensation and reinforcement of the coal pillar by the slurry in the water-guiding damage fracture can be reproduced.

The invention discloses a novel chemical material liquid optical granularity instrument with an anti-corrosion sample pool structure, and relates to the technical field of novel chemical material detection.The novel chemical material liquid optical granularity instrument comprises a pool body and a detection assembly, a sealing cover is arranged at the top of the pool body, a stirring assembly is arranged in the middle of the sealing cover, and the detection assembly is arranged at the top of the stirring assembly; the detection assembly comprises a connecting rod, the top of the stirring assembly is rotationally connected with the connecting rod, and one end of the connecting rod is rotationally connected with a piston rod. The gear set driven by the motor drives the stirring shaft to rotate, so that samples are uniformly mixed by the stirring rod, particle sedimentation is prevented, stirring motion is converted into reciprocating motion of the piston rod by utilizing the connecting rod mechanism, and continuous pumping of a medium is realized by matching with a plurality of one-way valves; meanwhile, the liquid suction head on the stirring rod synchronously sucks samples from different point positions in the rotating process, a dynamic multi-point sampling mode is formed, and accidental errors caused by traditional fixed point sampling are effectively overcome.

The invention discloses a stabilizing support of an air sampler, and belongs to the technical field of environment monitoring equipment, the stabilizing support comprises a support body and a bearing platform used for bearing the sampler, the top of the support body is connected with the bearing platform through a universal spherical hinge assembly, and the universal spherical hinge assembly comprises a base, a universal ball head and a short supporting column; the universal ball head is connected with the bearing platform through a short supporting column, a gravity center adjusting bin is fixedly arranged below the bearing platform, a lantern ring type locking mechanism is arranged on the opening portion of the base, and three or more radial guide grooves are formed in the end face of the opening portion of the base in the circumferential direction of the base. Each radial guide groove is internally provided with a locking block capable of sliding along the groove, the locking lantern ring can be rotated to move in the axial direction of the base, and then the locking blocks are driven to synchronously move inwards along the radial guide grooves through the conical surface extrusion effect so as to tightly hold the universal ball head. The problems that in the prior art, leveling efficiency is low, locking is prone to loosening, and the anti-overturning capacity is poor are effectively and comprehensively solved.

The utility model discloses a brewing sampling device for producing pleurotus ostreatus tea, which comprises a base, a central seat is arranged in the middle of the base, and a heating module is arranged at the top of the central seat; the brewing container is detachably installed on the center base, a top cover is detachably installed on the top of the brewing container, and an exhaust pipe is arranged on the top cover; the output pipe is arranged on one side of the brewing container, the output pipe is communicated with the interior of the brewing container, the output pipe is of an L-shaped structure, and a control valve used for controlling the output pipe to be connected and disconnected is arranged on the output pipe. According to the pleurotus ostreatus tea brewing device, the brewing container, the annular rotating frame and other structures are arranged, pleurotus ostreatus tea can be brewed through the brewing container, and after brewing, the output pipe can be controlled to be conducted and output samples based on the control valve, and the samples are received by the sampling container; the driving part works to drive the annular rotating frame to rotate, so that a plurality of sampling containers are used for sampling, and the efficiency and the practicability are improved.

The invention provides a pressure-controlled high-speed fluid precise trapping device, and belongs to the technical field of chemical engineering, the pressure-controlled high-speed fluid precise trapping device comprises a high-speed fluid trap, a precise pressure-controlled unit module, a multi-stage sampling connection assembly and a positioning bracket, and the device provided by the invention realizes multi-stage series linkage control through a connecting assembly; according to the device, continuous collection of high-speed fluid in the same event and process products in different stages can be achieved, meanwhile, trapping at any position and any angle can be achieved through the positioning support, a new experimental method and means are provided for revealing of high-speed fluid carrier changes and explosion process laws, and the device adopts modular design and is easy to popularize and use. All the connectors adopt the same standard, rapid connection is achieved through threads, pins and the like, assembling and disassembling are convenient, valves and pipelines are unified in standard, the universality of parts is good, and the device is convenient to clean in the later period and good in repeatability.

The invention discloses high-throughput flexible clamping laser sampling equipment and a high-throughput flexible clamping laser sampling method for rice breeding. Comprising an automatic sorting module which comprises a track switching mechanism and at least one seed conveying track; the seed metering device is used for conveying seeds to the seed conveying track; the sample cutting and collecting module comprises a working plate and a suction nozzle; at least one operation groove is formed in the operation plate, the operation grooves correspond to the seed conveying rails one to one, and the operation grooves communicate with the corresponding seed conveying rails; each operation groove is provided with a suction nozzle; the laser is arranged above the working plate; and the visual camera is mounted on one side of the laser. The working quality and efficiency of the device are effectively improved, and the conditions of seed carrying, low-quality sampling and the like are avoided.

The invention relates to an air detection method and system, and relates to the technical field of air detection, and the method comprises the steps: collecting the space detection information of a detection house and the specification of sampling equipment; calling a space area value, a space layout condition and a space placement condition based on the space detection information; determining the area sampling number by combining the space area value and the sampling equipment specification; generating a sampling initial position point according to the spatial layout condition and the area sampling number; determining a sampling adjustment position point according to the spatial placement condition and the sampling initial position point; and determining sampling duration according to the sampling adjustment position point and the specification of the sampling equipment, and controlling the preset sampling equipment to collect the air sample based on the sampling adjustment position point and the sampling duration. The method has the effect of improving the accuracy of a detection result when air detection is carried out in a room.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses an operation health degree monitoring method and system based on fine treatment mixed bed resin tracking, the monitoring system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Health degree monitoring is realized by establishing a layered monitoring system, and long-term stability of water quality of a power plant system is guaranteed.

The invention discloses a method for detecting the nitrogen content of organ tissues of different varieties of oilseed rapes based on visible near-infrared spectroscopy, which comprises the following steps: firstly, collecting oilseed rape leaf, shell, stalk and root system samples under the conditions of multiple varieties and multiple nitrogen fertilizer levels, and acquiring spectral data within the range of 430-2500nm by using a visible near-infrared spectroscopy; and a Kjeldahl method is synchronously adopted to measure the real nitrogen content as a reference value. Preprocessing the spectral data, including de-noising, standard normal variable transformation, multivariate scatter correction and derivative processing, so as to weaken the influence of scattering and baseline drift; characteristic wavelengths related to the nitrogen content are screened through stepwise regression, variable projection importance, competitive self-adaptive reweighted sampling, a continuous projection algorithm and other methods, and a random forest model, a support vector machine model, a partial least squares discriminant analysis model, a partial least squares regression model, a support vector regression model, an XGBoost model and other models are combined. And respectively constructing a classification identification model and a regression prediction model.

In order to allow an analyzer to be calibrated or a sampling channel to be purged without removing a sampling probe from a sampling location, provided are a sampling channel through which an exhaust gas from an internal combustion engine flows, an analyzer that is connected to the sampling channel and analyzes the exhaust gas, a diluter provided upstream of the analyzer in the sampling channel, a recirculated channel that branches from a branch point set between the analyzer and the diluter in the sampling channel and joins the diluter, a pump that is provided in the recirculated channel and guides part of the exhaust gas from the branch point to the diluter, an additional channel that is connected to the recirculated channel or the sampling channel and through which a calibration gas or a purge gas flows, and an opening and closing mechanism provided in the additional channel.

A method and apparatus used to determine atmospheric extinction coefficients in conjunction with an unmanned aerial vehicle are provided. The unmanned aerial vehicle may include a central body, at least one motor operatively connected to the central body, a condensation particle detection payload, and a data acquisition board including memory operatively connected to the data acquisition board, and a processor configured to generate extinction information.

The invention discloses a device and a method for extracting a polluted water layer of a water source in a grading manner. The device comprises a first pipeline, a partition plate, a second pipeline, a water inlet assembly and a pushing assembly, the second pipeline is inserted into the first pipeline, and the first pipeline and the second pipeline are sleeved and fixed; the multiple partition plates are distributed between the first pipeline and the second pipeline at intervals and used for forming a multi-layer liquid cavity, and the liquid cavity is used for storing liquid; the water inlet assembly is slidably arranged outside the first pipeline in a sleeving mode and used for guiding liquid into the liquid cavity. The pushing assembly fixedly sleeves the top of the first pipeline and is used for pushing the water inlet assembly to do linear motion in the length direction of the first pipeline. According to the device, liquid at different depths is isolated, the mixing phenomenon of the liquid at different depths is prevented, and the collection of the liquid at different depths underground is completed.