125results about How to "Implement sampling" patented technology

The present invention belongs to the technical field of digital manufacturing, and particularly relates to a three-dimensional measurement point cloud optimization registration method. The method comprises: obtaining the source point cloud and the target point cloud; performing denoising preprocessing on the three-dimensional measurement point cloud; using the Markov Monte Carlo-based simulated annealing registration algorithm to solve the global optimal registration transformation matrix; and finally, using the ICP registration method to iteratively complete precise registration. According tothe method provided by the present invention, the problem of convergence to the local optimal solution in the ICP registration method is solved, the global optimization solution of the transformationmatrix in the process of three-dimensional point cloud registration is realized, falling into the local optimum is avoided, the precision of three-dimensional point cloud registration is improved, and the method is superior to the traditional ICP registration; and parameter sampling is realized based on the Markov Monte Carlo method, the convergence speed of the algorithm is accelerated, the accuracy of point cloud registration is improved, the method has strong adaptability to the point cloud, and the algorithm has good robustness.

The invention relates to an algorithm for directly detecting metal foreign bodies for a wireless charger. When the metal foreign bodies appear between the wireless charger and mobile equipment, eddy-current loss of the metal foreign bodies is caused, heat is generated, and accordingly ignition and other security problems are brought. The algorithm is used for detecting heating of the metal foreign bodies and terminating power transmission in time. The core content of the algorithm is as follows: the difference between power transmitted from the transmitting end of the wireless charger and power received from the receiving end of the mobile equipment is detected so that loss power of the metal foreign bodies can be calculated, if the loss power exceeds a certain set value, power transmission is terminated, and thus the temperature of the metal foreign bodies is prevented from further rising.

The invention relates to a steel pipe roundness measuring instrument, comprising a rack, displacement sensors and a data collection and disposal system, wherein the displacement sensors are electrically connected with the data collection and disposal system. The steel pipe roundness measuring instrument is characterized in that a plurality of scored pulleys and a power mechanism are arranged on the rack, wherein a reference round ring is arranged on the rack, and is supported by the plurality of scored pulleys in a sliding manner; the output of the power mechanism is in transmission connection with the reference round ring; a plurality of telescopic booms pointing to the circle center are arranged on the equal diversion points of the circumference of the reference round ring; one displacement sensor is arranged at the end part of one end, which points to the circle center, of each telescopic boom; the plurality of telescopic booms are driven by a synchronizing mechanism; the plurality of displacement sensors are always kept on the same circumference; and the power mechanism and the synchronizing mechanism are controlled by the data collection and disposal system. The steel pipe roundness measuring instrument has the characteristics of being reasonable in design and simple in structure, and is capable of achieving the noncontact on-line measurement.

The invention discloses an underwater fry, young shrimp and young crab quantity estimating and behavior monitoring device and method based on computer vision. The device is characterized in that the device comprises a two-way winch, a motor, a floater and a video collecting device, wherein the two-way winch and the motor are used for driving the video collecting device to carry out all-dimensional and different-water-level sampling in a nursery pond, the floater is used for bearing the motor, and the video collecting device is used for collecting young videos of fry, young shrimps and young crabs. The method comprises the following steps that the video collecting device is arranged in water and is respectively driven by the two-way winch and the motor to collect the videos of the fry, the young shrimps and the young crabs in the nursery pond, and the quantity and the density of the fry, the young shrimps and the young crabs in the whole nursery pond are estimated by using an image processing technology according to collected fry, young shrimp and young crab images of different water levels and different dimensions; a light inducing light source is turned on, and the shot videos are used in the image processing technology to calculate the swimming speed of targets and a cluster center coordinate to reflect the moving capability and light inducing capability of the fry, the young shrimps and the young crabs. The underwater fry, young shrimp and young crab quantity estimating and behavior monitoring device has the advantages of being simple in structure, wide in monitoring range, convenient to use and high in accuracy, and is suitable for biological quantity estimation and behavior monitoring on the nursing state of automated aquaculture.

The invention discloses an unmanned aerial vehicle pod for environmental sample collection and a collection method. The unmanned aerial vehicle pod comprises an unmanned aerial vehicle control system and a sample collection device hung on an unmanned aerial vehicle. The sample collection device comprises a pod shell and a negative pressure sampler arranged in the pod shell. The negative pressure sampler is provided with a collection arm stretching out of the pod shell. Under the negative pressure effect of the negative pressure sampler, samples are pumped into a negative pressure sampling pipe through the collection arm. The unmanned aerial vehicle pod has the advantages of being simple in structure, light, convenient and flexible to control and the like; a plurality of identical or different samples can be collected through one time of flight of the unmanned aerial vehicle; the defects that the power of an existing sampler is supplied by a sampling pump, and the existing sampler is complicated in structure and inflexible in control are overcome; mechanical faults are greatly reduced, the load borne by the unmanned aerial vehicle is lowered, and sample collection is more accurate, more economical and easier.

The invention relates to a sampling capsule endoscope capable of being automatically sealed. The sampling capsule endoscope comprises a capsule shell, a sealing plug, a needle tube, a partition plateheater, a heating ring, springs, a heating-fusing catheter, a capsule controller, a capsule sensor, a capsule support plate and a needle tube mounting bracket, wherein the capsule shell comprises an electric control device cavity, a collecting device cavity and a sealed sampling cavity, the electric control device cavity and the collecting device cavity are partitioned by the capsule support plate, the collecting device cavity and the sealed sampling cavity are partitioned by the sealing plug, a sampling hole is arranged in the capsule shell, the capsule support plate is provided with a catheter communicating with the sampling hole, the capsule controller and the capsule sensor are arranged in the electric control device cavity, and the partition plate heater is fixed on the inner wall ofthe collecting device cavity. For the sampling capsule endoscope capable of being automatically sealed, the active digestive tract fluid sampling can be completed, meanwhile, after the sampling is finished, samples in a sampling pond are effectively isolated, so that leakage and pollution are avoided.

The invention discloses a volatile organic compound online monitoring system. The volatile organic compound online monitoring system comprises a sampling probe, a tracing pipe, a preprocessing system, a monitoring host, a sampling pipeline, a carrier gas pipeline, a carrier gas source, a fuel gas source, a combustion-supporting gas source and a data processing and displaying unit, wherein the sampling probe is connected with the preprocessing system by the tracing pipe; the preprocessing system is connected with the sampling probe and the monitoring host; the monitoring host is connected with the preprocessing system, the carrier gas source, the fuel gas source, the combustion-supporting gas source and the data processing and displaying unit; the carrier gas source is connected with the monitoring host; the fuel gas source is connected with the monitoring host; the combustion-supporting gas source is connected with the monitoring host; the data processing and displaying unit is connected with the monitoring unit. According to the volatile organic compound online monitoring system disclosed by the invention, at most 15 minutes are spent for obtaining a group of sampling data of benzene series, higher time resolution is obtained, the running cost and the maintaining cost are low, the operability is strong, and the volatile organic compound online monitoring system is particularly suitable for continuous and automatic online detection of volatile organic compounds discharged by a stationary source.

The invention discloses a multi-signal-source frequency and DOA joint detection method and a multi-signal-source frequency and DOA joint detection device. The multi-signal-source frequency and DOA joint detection method comprises the steps of: conducting Mf-point DFT on L paths of signal samples, correcting frequencies and phases of DFT results by using a Tsui spectrum corrector to obtain a parameter group of corrected D groups of frequencies, phases and amplitude values, and constructing D direction vectors by using the parameter group; grouping and matching the D direction vectors accordingto the minimum distance to obtain D pieces of signal source parameter matching information; constructing a frequency remainder group according to the D pieces of signal source parameter matching information, and substituting the frequency remainder group into a closed type robust Chinese remainder theorem (CRT) model for reconstruction, so as to obtain a frequency estimated value; and acquiring L-1 phase differences according to the D pieces of signal source parameter matching information, constructing a phase reminder group, substituting the phase remainder group and a reconstructed module value group into the closed type robust CRT model for reconstruction to obtain an intermediate parameter, and calculating to obtain a DOA estimated value. The multi-signal-source frequency and DOA jointdetection method and the multi-signal-source frequency and DOA joint detection device realize the high-precision frequency and DOA joint estimation of multiple pairs of targets.

The invention discloses a smell, VOC and floating harmful substance detection cabin with an external circulation filtering device. The detection cabin comprises a constant temperature and / or constant humidity cabin body for providing a standard test environment, the cabin body is provided with at least one taste and odor sampling port, the cabin body is connected to a gas compensation device for gas volume compensation to the inside of the cabin body during gas sampling so as to prevent pollution gas outside the cabin body from entering the cabin body because of pressure difference, the gas compensation device is mounted inside or outside the cabin body, or the gas compensation device is equipped with a large port for sealing and fixation on the cabin wall of the cabin body. The detection cabin also includes the external circulation filtering device disposed outside the cabin body. The detection cabin provided by the invention can realize gas sampling under the condition of a ventilating / airtight cabin body, and detection of the release amount of formaldehyde, VOC and other volatile harmful gases volatilized from a detected objected, also can avoid the disturbing influence of environmental factors or other uncertain factors to the test result, and has the characteristics of good stability and high test precision.

The invention discloses an aerosol automatic collection and Raman spectrum detection device, and belongs to the technical field of aerosol air detection. The system consists of an aerosol collection unit, an aerosol transmission unit, a laser detection unit, a data acquisition and storage unit and a control unit. The aerosol automatic collection and Raman spectrum detection device provided by theinvention is based on a single chip microcomputer control system, realizes the automatic collection of aerosol by using an aerosol collection device, orderly runs the system through the control unit,and performs Raman spectrum collection on collected aerosol particles by using a red light or near infrared semiconductor laser, a reflective optical path and a refrigeration CCD. The classification and identification of an aerosol particle samples are realized by a hierarchical clustering method for the collected Raman spectra of the aerosol particles. According to the device provided by the invention, the characteristics of automatic aerosol collection and detection for a long time, compact structure, strong operability and the like can be realized; meanwhile, a shell of the whole system iswaterproof, and the requirements on a use environment are relatively low.

The invention discloses an airborne aerosol particle vertical observation system based on an unmanned aerial vehicle, and an airborne aerosol particle vertical observation sampling method, the systemcomprises an unmanned aerial vehicle airborne platform system, an unmanned aerial vehicle ground control platform, a ground data collecting and processing center system and a ground data collection and comparison system; the sampling method comprises: causing a four-bladed propeller light-weight unmanned aerial vehicle to perform automatic hovering and flying according to a preset height and routewhile carrying a portable laser pump type aerosol particle parameter measuring instrument, various weather sensors and an optical image shooting device, the mass concentration and number concentration of vertical atmospheric aerosol particles in a specific target airspace, and atmospheric environment parameters such as temperature, pressure, humidity and the like, and optical image data can be continuously measured, the collected data are sent to the ground data collecting and processing center through a wireless protocol, and the ground data collection and comparison system completes the display, analysis and processing of the data after performing quality control. The entire system is compact in structure, easy to control and adjust, high in system stability and low in cost.

It is a Hageman detecting apparatus used to continuous sample in lens optics quality measurement, which comprises the light system, beam scanning structure, measured lens, image receiving system and system control and data process software. It is characterized by the following: the said lighting system is calibration light source with beam diameter adjustable; the said beam scanning structure comprises image screen, first step motor, one dimensional motor adjusting rack and support rack; the said image receiving system comprise CCD cameral, guiding rail, second step motor, rack and computer, wherein, the computer is connected with first step motor, second step motor, third step motor and CCD cameral through signal line.

The invention discloses an author conference recommendation method based on scientific cooperation heterogeneous network analysis, and the method comprises the following steps: obtaining scientific cooperation data, and constructing a heterogeneous scientific cooperation network; carrying out the neighbor node sampling on the heterogeneous scientific cooperation network; carrying out the neighbor information aggregation on the sampled neighbor nodes; carrying out training and learning on the heterogeneous scientific cooperation network to obtain heterogeneous network representation; calculating the similarity between the representation vector of the author node and the representation vector of the conference node; and according to the similarity, recommending a conference which is highly similar to the author to the author. The method provided by the invention has a better effect in recommending the corresponding conference for the author and predicting the author to publish the article on the corresponding conference in the scientific cooperation network.

The invention discloses a power-assisted module and water quality integrated treatment equipment thereof. The water quality integrated treatment equipment comprises a microbial inoculum feeding modulewhich is used for storing a powder strain mixed with a powder culture medium, wherein the strain comprises photosynthetic bacteria, a culture module which is used for continuously culturing the microorganisms conveyed from the microbial inoculum feeding module and conveying a culture solution into a microorganism discharging tank of a discharging module for storage after the microorganisms are cultured to be mature, the discharging module which is used for discharging a culture solution containing microorganisms and an agent for improving the water quality, a monitoring module which is used for monitoring the water quality of the target water and acquiring water quality parameters, and a sampling module which is used for collecting and storing the water of the target water The equipment is high in function integration degree, can achieve the functions of water quality monitoring, sampling, microorganism continuous culture and feeding, agent feeding and the like at the same time, and can achieve treatment, monitoring and sampling of a target water area only through one device in actual use.

The invention provides a nickel-cadmiun storage battery charging adjuster employing a satellite power supply, relates to the field of charging a storage battery pack employing the satellite power supply, and aims at solving the problem of shortage of an adjusting device for ensuring stable charging and stable charging terminating for the storage battery pack through the satellite power supply at present. A boost topological structure circuit carries out boost conversion on input bus voltage; a current and voltage sampling feedback control unit samples charging output current and voltage and synthesizes the current, the voltage and a signal to finish obtaining and outputting of a feedback signal; a PWM control unit outputs a corresponding pulse width signal through the feedback signal to drive an NMOS tube of the boost circuit; and the control unit receives a charging enable signal obtained by amplifying an error of the bus voltage of the satellite power supply, controls an overall charging circuit to be connected when the signal is effective, obtains operating temperature and voltage of the storage battery pack and stops charging when the voltage of the storage battery pack reaches charging terminating voltage corresponding to a temperature monitoring signal, so that the charging process is completed. The nickel-cadmiun storage battery charging adjuster is applied to a bus for charging the storage battery pack.

A provided microbial electrochemical system for continuous culture, sampling and real-time detection comprises a medium container, a peristaltic pump, a culture reactor, a gas closet, an air pumping-exchanging system, a computer and an electrochemical workstation. The beneficial effects comprise that the microbial electrochemical system comprises three reaction chambers for parallel culture, so that complete parallel comparison can be realized in electrical stimulation experiments; six culture reaction chambers can independently perform continuous culture, different flow speed and different electrode-surface shearing force are provided; the microbial electrochemical system can keep long-term gas-liquid seal and isolate chemical and biological pollutions; nutrient-solution sampling and electrode-surface sampling can be realized in an experiment process; widely-applicable interfaces and modularization design are provided, specific electrodes and other parts can be conveniently refitted or mounted according to experiment demands; and the microbial electrochemical system mainly aims at microbes coming from sea, and is applicable to analysis on multiple biological samples containing environment samples and purely-cultured samples.

The invention discloses a terahertz pulse time-domain waveform detection method and a system. The method comprises: using circularly polarized light as the probe light for terahertz time-domain waveform electro-optical sampling wherein the probe light is modulated in an electro-optical crystal and divided into two paths by a beam splitter with each path of signal light containing the polarization component information of the terahertz wave field; making the directions of these two components orthogonal through the light path adjustment; and in order for more accurate and more convenient detection of terahertz polarization angle, setting the modulation frequency of pump light as f, and using the modulation signal as the reference frequency of a two-phase lock-in amplifier wherein the front end of the two-phase lock-in amplifier adopts a dual channel multiplexer whose switching frequency is represented as 2f to perform switching of the electro-optical signals containing the terahertz component information. According to the invention, a two-phase lock-in amplifier is utilized to obtain the amplitude and polarization direction of a terahertz wave time-domain electric field; and then, through the change of the delay of the probe light and the terahertz wave, the terahertz time-domain polarization waveform can be worked out and the complete information about the terahertz wave can be obtained.

The invention relates to a method for optimising the operation of a hydrodynamic component integrated into a drive train of a vehicle, using a regulating device associated with said component. According to said method, a nominal characteristic line or a nominal characteristic diagram is stored in a memory unit for a hydrodynamic component; an actual value (N ist-n; M ist-n) of at least one variable at least indirectly characterising an operating point (N ist-ni; M ist-ni) is determined for each transmission process; and the actual value (N ist-n; M ist-n) is compared with the nominal value from the nominal characteristic diagram. If the actual value deviates from the nominal value, the regulating variable for the operating point in question is modified and stored as a new nominal regulating variable for said operating point (N ist-ni; M ist-ni).

The invention provides a storage battery discharge adjuster of an all-adjusted bus-type satellite power supply, relates to the field of storage battery discharging of a satellite power supply, and aims at solving the problems that bus voltage fluctuation during an earth shadow is very large and the working stability of a whole satellite instrument is affected since bus voltage of the satellite power supply is adjusted by employing an unadjusted bus mode and a semi-adjusted bus mode at present. A buck topological structure circuit carries out corresponding step-down conversion on input voltage of a storage battery pack; a current sampling unit converts discharge current of storage batteries into a voltage signal and outputs the voltage signal to a controller; a voltage sampling feedback unit samples the voltage output by the adjuster and then outputs the voltage; a PWM control unit outputs a pulse width signal through a feedback signal; a switch driving circuit carries out bootstrap driving on the pulse width signal for driving a switch tube of the buck circuit; and a control unit is used for receiving an output discharge output voltage signal, connecting a discharge circuit for providing a bus with electric energy when the bus voltage is reduced, and cutting off the discharge circuit when the bus voltage exceeds a required value.

The invention discloses a power supply sampling circuit which comprises a current transformer, a rectifier module, a voltage stabilizing module, a sampling module, a subtraction circuit module and a superimposed circuit module. The input end of the current transformer is connected with a power grid, the output end of the current transformer divides signals into two ways of signals through the sampling module, the first way of signals outputs electric energy for power supply through the rectifier module and the voltage stabilizing module, and the second way of signals outputs sampling data through the subtraction circuit module and the superimposed circuit module. The invention also discloses a power supply sampling method of the power supply sampling circuit. The power supply sampling method comprises the steps that the current transformer obtains signals; the signals are sampled and divided into two ways; the first way of signals provides power supply signals to the outside through the rectifier bridge module and the voltage stabilizing module the second way of signals are converted into final power system electric energy sampling signals through the subtraction circuit module andthe superimposed circuit module. The invention also discloses a fault indicator including the power supply sampling circuit and the power supply sampling method. The power supply sampling circuit only adopts one current transformer and is low in cost and high in reliability.

The invention discloses a sample rack managing and conveying device and a biochemical immune assembly line. The sample rack managing and conveying device comprises a mounting structure, a sample rack management structure, a sample rack carrying mechanism, an information reading structure and a sample rack relay conveying system. The sample rack relay conveying system comprises a bearing piece; a sample frame rail transfer mechanism provided with a rail transfer rail and a guide rail; and a sample rack conveying mechanism provided with a first conveying mechanism and a second conveying mechanism. According to the invention, the samplerack carrying mechanism carries the sample racks into the orbital transfer track, the orbital transfer track pushes the sample racks to the first conveying mechanism, and the sample racks are conveyed downwards through the first conveying mechanism in a relay manner; and the second conveying mechanism convey the returned sample racks to the orbital transfer track or the guide track, so that relay conveying and recycling of the sample racks between different detection instruments are achieved, the online detection efficiency is improved, the online detection requirement of high-throughput samples in clinic is effectively met, and the waiting time of patients is shortened.

The invention discloses an environment sensing system based on a laser radar. The environment sensing system comprises the laser radar, an automatic driving automobile calibration module, a ground point cloud extraction module, a point cloud data down-sampling module and a laser radar data point cloud clustering module. According to the environment sensing system based on the laser radar, the calibration between the laser radar data and the automatic driving automobile can be completed; a stable rotation translation matrix can be used, the algorithm difficulty is low, the development and maintenance cost is low, laser radar data down-sampling can be achieved, the algorithm has a very long history by using the stable algorithm, the algorithm reliability is fully proved by various experiments, and the development and maintenance cost is low.

The present invention discloses a sampling module and water quality integrated treatment equipment thereof. The water quality integrated treatment equipment comprises a microbial inoculum feeding module for storing a powder strain mixed with a powder culture medium, a culture module used for continuously culturing microorganisms conveyed from the microbial inoculum feeding module and conveying a culture solution into a microorganism discharging tank of a discharging module for storage after the microorganisms are cultured to be mature, the discharging module used for discharging the culture solution containing the microorganisms and a medicament for improving the water quality, a monitoring module used for monitoring the water quality of a target water body and obtaining water quality parameters, and a sampling module is used for collecting and storing water of the target water body, wherein the strain comprises photosynthetic bacteria. The equipment has a high function integration degree, the functions of water quality monitoring, sampling, microorganism continuous culture and feeding, agent feeding and the like can be achieved at the same time, and the treatment, monitoring and sampling of a target water area can be achieved only with one piece of equipment in actual use.

The invention discloses a method for detecting benzene and total volatile organic compounds in indoor air and a sampling device. The method comprises the following steps: 1) using an adsorption tube for air sampling, and controlling the temperature of the adsorption tube to be below 28DEG C by a temperature adjusting device, wherein an adsorbent filled in the adsorption tube comprises 60 to 80 mesh-Tenax-TA adsorbent; 2) resolving the adsorption tube in a resolver, and directly sending an analytical gas to a chromatograph for analysis; and 3) respectively calculating the content of the benzeneand the total volatile organic compounds by peak area quantification, retention time qualification, and area external standard method. The method can simultaneously detect the benzene and the total volatile organic compounds, overcomes the influence of ambient temperature, avoids a penetrating phenomenon, has high recovery rate, and is simple in operation, thereby effectively saving workload andcost.

The invention provides a single-grid control voltage current sampling device based on LIGBT. A cellular structure thereof comprises a first conductive type semiconductor substrate, a substrate electrode, an epitaxial oxide layer, a second conductive type semiconductor drift region, a second conductive type semiconductor doping area, a first conductive type semiconductor anode region, a first metalelectrode, a first conductive type semiconductor area, an oxide layer, a metal grid, a first conductive type semiconductor doping area, a second conductive type semiconductor cathode area, a first conductive type semiconductor doping area, a second conductive type semiconductor doping area, a first conductive type semiconductor cathode area, a third metal electrode, a fourth metal electrode, a fifth metal electrode, and a second metal electrode. The device can sample the current flowing through the device at a switch-on state, the detection on the anode voltage can be realized at the off transient, the current sampling and the voltage sampling are alternately performed, the sampling precision is high, and the sampling ratio is controllable.

The invention relates to a display energy saving device and method. The display energy saving device comprises an average image level calculation module which is configured to calculate an average image level value frame by frame according to inputted display data; a display data sampling and storage module which is configured to sample the inputted display data according to preset sampling pointsand store the sampled data; an image discrimination module which is configured to determine that a display image is a dynamic image or a still image according to the change of the sampled data and the change of the average image level value; an energy saving algorithm module which is configured to adjust the inputted display data according to a preset energy saving algorithm through a display image discrimination result; a display data arrangement and processing module which is configured to arrange and process the display data adjusted by the energy saving algorithm module and output the display data. The present invention also provides a corresponding display energy saving method. The device can effectively avoid the misjudgment of the display screen by the display energy saving algorithm, and avoids the deterioration of the display effect caused by the misjudgment of the energy saving algorithm.

The present invention discloses a method for realizing low-power all-optical quantization based on a micro-nano resonant cavity. The current all-optical sampling technology and the linear relation of the resonance wavelength and he incident light pulse of the micro-nano resonant cavity are combined, and the spectrum coding is performed by using a filter to realize the all-optical quantification. The device comprises an all-optical sampling system based on the nonlinear polarization rotation of a semiconductor optical amplifier, a sampling pulse spectrum broadening system through intensity modulation, an optical quantization system based on the micro-nano resonant cavity and an optical encoding system; and simulation optical signals are loaded to the strength envelop function of the sampling optical pulse sequence to realize optical sampling, the optical pulse after sampling is first subjected to the spectrum broadening system broadening, then realizes the optical quantification through the micro-nano resonant cavity to, and finally performs encoding through the optical encoding system. The method and device for realizing low-power all-optical quantization based on the micro-nano resonant cavity can greatly reduce the requirement on the sampling pulse power and break through the defects of the current all-optical quantification technology so as to have a chance to realize the high-speed and high-precision all-optical quantification.

The present invention discloses a monitoring module and a water quality integrated treatment device thereof, the water quality integrated treatment device comprises: a microbial inoculum feeding module for storing a powder strain comprising photosynthetic bacteria and mixed with a powder culture medium; a culture module which is used for continuously culturing microorganisms conveyed from the microbial inoculum feeding module and conveying a culture solution into a microorganism discharging tank of a discharging module for storage after the microorganisms are cultured to be mature; the discharging module which is used for discharging the culture solution containing the microorganisms and a medicament for improving the water quality; the monitoring module which is used for monitoring the water quality of a target water body and obtaining water quality parameters; and a sampling module which is used for collecting and storing the water of the target water body. The device is high in function integration degree, can achieve the functions of water quality monitoring, sampling, microorganism continuous culture and feeding, agent feeding and the like at the same time, and can achieve treatment, monitoring and sampling of a target water area only through one device in actual use.

The invention relates to a near-infrared spectral variable selection method based on a Monte Carlo variable combination cluster, and belongs to the field of analytical chemistry and spectroscopy. The method comprises the following steps that firstly, calibration set samples are sampled randomly by the Monte Carlo sampling method; secondly, feature variables of each sample subset are selected by the variable combination cluster analysis method, and the feature variables of all the sample subsets are preserved to obtain a new variable space; then feature variables of the new variable space are further selected by using the variable combination cluster analysis method. The method not only samples the variable space by the binary matrix sampling method, but also realizes the sampling of a sample space by the Monte Carlo sampling method, and avoids the influence of the change of sample sets on the variable selection.

A sampling device for water quality monitoring comprises a telescopic cylinder, the telescopic cylinder is sleeved with a winding device, and the winding device is connected with a connecting line and a sampling barrel; the sampling barrel comprises an uppermost threaded cover, a barrel part and a cone part, and a communicating valve communicated with the interior of the sampling barrel is arranged on the threaded cover; and a filter mechanism is arranged at the bottom of the cone part and comprises a filter pipe communicated with the cone part, a second filter screen is arranged above the filter pipe, a limiting device is arranged below the second filter screen, and a floating ball is arranged in the limiting device. According to the device, a water sample of a water layer with a specified depth can be collected, and a sediment sample in the water sample of the water layer with the specified depth can be collected, so that the functionality of the device is improved; and the problem that the sampling barrel moves along with water flow due to the impact of the water flow to the sampling device in the flowing water flow sampling process, and the sampling barrel cannot be accurately controlled to reach the depth of a water layer with a specified depth so as to collect a corresponding water sample is solved.