154results about How to "Reduce sampling costs" patented technology

The invention discloses a hyperspectral imager and an imaging method based on compressive sensing, mainly solving the problem that the existing hyperspectral imager has high sampling rate and high sensor realization difficulty. The imager comprises a battery of lens, a dispersive device, a spatial light modulator, a linear detector and a peripheral circuit. The acquired linear light source is split in the space through the dispersive device to form the plane light source formed by spatial dimension and spectral dimension. The plane light source converges again in the direction of spatial dimension after being modulated by the spatial light modulator to form the linear light source formed by spectral dimension. The linear detector completes sampling and quantizing. The imaging method is characterized by utilizing the obtained hyperspectral compressive observation vector to obtain the hyperspectral images through grouping and reconstitution. The hyperspectral imager improves the average reconstitution accuracy of each spectrum by utilizing the joint sparse characteristic among the hyperspectral spectra, has the advantages of simple structure and low cost and is suitable for compressive sensing and imaging of hyperspectra.

The invention relates to an unmanned ship device and sampling method for automatic sampling of the water quality. The unmanned ship device comprises an unmanned ship body, an energy and control unit arranged in a bin of the unmanned ship body, and an automatic water quality sampling unit. The automatic water quality sampling unit comprises a sampling bottle, a supporting body mechanism for installation of the sampling bottle, a sampling pump arranged on the outer side of the unmanned ship body, a sample hose connected with the sampling pump, and an oscillating arm water-fetching mechanism forcontrolling the sampling hose to rotate. The oscillating arm water-fetching mechanism comprises a hollow pipe nested on the outer side of the tail section of the sampling hose, and a first stepping motor connected with the end, close to the sampling pump, of the hollow pipe. By means of the unmanned ship device and sampling method for automatic sampling of the water quality, water quality samplesof multiple sampling sites can be collected sequentially in a working cycle, the samples can be analyzed synchronously after being sent back, the sampling efficiency is further improved, and water quality samples of different areas or watersheds can be conveniently, quickly and automatically collected.

The invention discloses a whole process management and control-based environment sampling management system and method. The system comprises an environment sampling whole process management system, a laboratory data management system, a background database management system, one or more embedded system secondary development-based field sampling handheld management terminals, one or more cloud information distribution systems, one or more directed wireless data reception / transmission ends, one or more remote sampling terminals and one or more remote sampling tools, wherein the one or more cloud information distribution systems are supplied to the public for accessing environment sampling test data and reports, and the one or more directed wireless data reception / transmission ends are used for field short-distance data transmission. According to the system and method disclosed by the invention, the whole process management and control in an environment sampling process can be realized by utilizing technological means such as real-time video uploading, two-dimensional code encryption and task pushing.

The invention relates to a seabed type conical investigating and drilling integrated machine which comprises a tower, a power head, a drilling tool storeroom, a manipulator mechanism, a leveling mechanism, an instrument box, a winch, a drilling tool, a clamp holder and a hydraulic pump. According to the drilling process of a seabed drilling machine, the power head provides the rotation power and realizes the feeding and recycling of the drilling tool through a tower guide rail on the tower; the drilling tool storeroom is arranged on the two sides of the power head and used for storing variousdrilling tools; the drilling tools are automatically stored and fetched through the manipulator mechanism, and the leveling mechanism keeps the drilling tool vertical to the seafloor when the integrated machine works; a core barrel for wire line coring is released and recycled by the winch; and the drilling tool is clamped and removed by the clamp holder. The integrated machine provided by the invention has a scientific and reasonable structure, is simple and convenient to control and safe and reliable to use and is suitable for the large-depth deep hole core sampling on seabed and also for operation on land.

The invention relates to fidelity secondary sampling equipment for bottom sediments. The fidelity secondary sampling equipment comprises an upper barrel assembly and a lower barrel assembly, a piston assembly, a turning cover assembly, a middle supporting plate, an upper guide rail barrel, a lower guide rail barrel and a sampling barrel, wherein the middle supporting plate is mounted between the upper barrel assembly and the lower barrel assembly; the upper guide rail barrel is mounted between the middle supporting plate and an upper end sealing disc; the turning cover assembly and the piston assembly are mounted in the lower barrel assembly; and the sampling barrel is mounted at the lower end of the piston assembly. According to the fidelity secondary sampling equipment disclose4d by the invention, a designed mandrel and a designed elastic clamping plate structure can stop the sampling barrel from moving upwards in the sampling process; an overlying water check valve can guarantee that overlying water can be smoothly discharged out in the sampling process, and the low-disturbance sampling is realized; a designed secondary sampling check valve can be used for the secondary sampling so that the sampling rate is improved and the sampling cost is saved; and a sealing piece between two adjacent parts and a sampling back turning cover are automatically closed to guarantee the sealing of a system. The fidelity secondary sampling equipment disclosed by the invention is compact in structure, high in sampling rate and good in high-fidelity effect, the sampling time is saved and the cost is low; and the fidelity secondary sampling equipment is applicable to fidelity sampling of the bottom sediments, natural gas hydrates and mud samples in rivers and lakes.

The invention provides a press-in slide-vane sampler structure for acquiring a soft soil, sludge or sewage sludge undisturbed sample with high water content in a sludge storage field, dredger fill field and landfill field and an installation and using method. The press-in slide-vane sampler structure can sample according to the conditions of soft flow state soil in the depth direction of sludge storage yards and dredge fill fields, and the acquired mud sample retains in-situ physical and chemical properties in the sampler. The whole structure comprises a three-sided square cylinder, a slide soft vane, a trabecula slot baffle plate and a trabecula. The sampler adopts a modular design, can control the length of sample separation length as well as the size of a sampling region and sampling precision. The sampler is simple, light, simple and convenient in operation, high in efficiency and low in sampling cost.

The invention discloses a device for enriching semi-volatile organic compounds in underground water. The device comprises a barrel which is provided with an overflow port and an emptying port, wherein the upper end of the barrel is provided with a water sample inlet; a water filter is assembled at a water sample inlet end; connecting rods are uniformly distributed on the barrel; a disc body with a water inlet pipe is arranged on each connecting rod in a penetrating way; the water inlet pipe is communicated with a sealing ring arranged under the disc body after passing through the disc body; an inlet at the upper end of the water filter is tightly matched with the sealing ring; an outlet at the lower end of the water filter is communicated with a backflow pipe fixedly connected to the barrel; and an outlet at the lower end of the backflow pipe is located at the bottom of the barrel. By using the device, the positive and negative enrichment of semi-volatile organic compounds in water under various hydrogeological conductions in field geological investigation can be realized, the sampling cost is reduced, the work efficiency is increased, the semi-volatile organic compounds are easy to store and transport and free of secondary pollution, substances to be detected are prevented from being lost in the operation process, and the recovery rate of the semi-volatile organic compounds is increased, for example, the recovery rate of the sampled phenanthrene in the detected underground water can be increased from 70% in the prior art to 90%.

The invention discloses a multi-depth rotating-wheel closed sampler and a method thereof. The sampler comprises a sampling holding rod with a clamping groove, a cylindrical sample storage nest, a sealing cylinder and a rotating holding rod, wherein the lower end of the sampling holding rod is connected with the cylindrical sample storage nest; the lower end of the cylindrical sample storage nest is connected with a conical drilling probe; a rectangular opening is formed on the side face of the sealing cylinder; the rotating holding rod is fixedly connected with the sealing cylinder; the sealing cylinder and the rotating holding rod are connected together to form a rotary outer sleeve, and the conical drilling probe, the cylindrical sample storage nest and the sampling holding rod are connected together to form a rotating-wheel type sample storage nest; and the rotary outer sleeve is sleeved outside the rotating-wheel type sample storage nest from top to bottom and is fixedly fastened by an annular spring buckle. The multi-depth rotating-wheel closed sampler can be used for sampling at different depths at a same place at a time, the sampling depth is accurately controlled, and the sampler equipment is simple, light in weight, easy and convenient to operate, high in efficiency and low in sampling cost and causes slight disturbance at the sampling place.

A system and method for producing label-free micro-array biochip based on the surface plasmon resonance in metallic nano-slit arrays, wherein the micro-array biochip of the does not utilize fluorescent labeling. Without the fluorescence labeling, the label-free micro-array substantially reduces the sample cost and can detect bio-molecular interactions in their native forms.

The invention discloses a portable underground water fixed-depth sampling device, a sampling system and a sampling method, and belongs to the field of site pollution investigation and risk assessment.A moving blocking air bag is arranged; stagnant water at the upper end and the lower end of an underground water sampling probe in a well pipe is effectively blocked, an underground water sample at the depth where the sampling probe is located can be accurately collected, the problem that in the well washing sampling process of a traditional method, upper-layer water samples and lower-layer watersamples in the well pipe are mixed, and consequently sample dilution is caused is solved, and the concentration detection accuracy is improved. Underground water samples of different depths can be accurately collected in the same monitoring well, fixed-depth sampling is achieved, and the cost is obviously reduced. In addition, the stagnant water on the upper layer and the lower layer of the underground water sampling probe in the well pipe is effectively blocked, the well washing volume before sampling can be reduced, the sampling time is saved, the sampling efficiency is improved, the well washing wastewater generation amount is reduced, the sampling cost is further reduced, disturbance to underground water in the well pipe can be reduced, and the accuracy of detected concentration is guaranteed.

A flue gas mercury sampling gun for a thermal power plant comprises a stainless steel sleeve and a stainless steel shell. The stainless steel shell is disposed at the rear end of the stainless steel sleeve and provided with an end cover. A front non-heating exploring tube is detachably connected to the front end of the stainless steel sleeve. A quartz tube which is filed with activated carbon and provided with openings at two ends is disposed in the stainless steel sleeve. A heating layer is disposed between the quartz tube and the stainless steel sleeve. The front end of the quartz tube extends into the front non-heating exploring tube, and the rear end thereof is communicated with a tower mouth disposed on the stainless steel shell. The sampling gun is telescopic, multipoint sampling at low cost is achieved, and on-site operation procedures are reduced. By the heating layer, gasified mercury sedimentation caused by temperature lowering can be prevented, sampling gun inner wall corrosion caused by steam condensation can also be prevented, and sampling accuracy is increased.

The invention discloses a sampling device for water quality inspection of rivers and lakes based on an unmanned aerial vehicle. The sampling device comprises the unmanned aerial vehicle, a landing gear, a GPS module, a lifting motor fixing frame, a lifting motor, a lifting reducer, a lifting main shaft, a winding drum, a steel wire rope, a sampling cylinder, a sampling motor, a sampling reducer, asampling main shaft, a sampling box, sampling cavities, closed grooves, sample inlets, sample outlets, swinging rods, rubber rings, tensioning springs, driving pins, a sampling crank, a sampling connecting rod, a sampling pull rod, driving holes, a baffle, a sealing cavity, a battery, a plurality of front water passing holes, a plurality of rear water passing holes and a control handle. The sampling device for the water quality inspection of the rivers and lakes based on the unmanned aerial vehicle has the beneficial effects that (1) the structure is simple; and (2) the degree of automation is high, the sampling speed is fast, the sampling cost is low, extraction of multiple water samples of different depths can be realized at the same time, and the application range is wide.

A system and method for analysis of minute quantities of contaminants in water. Liquid water is converted to water vapor and then excited into a plasma state with microwave radiation. Optical emissions from the plasma are spectrally analyzed to provide qualitative and / or quantitative analyses of the contaminants in the water. Preferred embodiments provide special techniques for generating the water vapor from a water stream; exciting the water vapor to a plasma state; varying and controlling the plasma energy; introducing samples into an existing plasma; collecting emissions from the plasma from a variety of angles; selecting the optical collection angles; protecting the analysis optics from the plasma; exhausting the spent plasma gases back into the water stream; and analyzing the results to yield concentrations of elements and molecules in the sample.

The invention discloses an output voltage sampling method and system for a flyback converter based on primary feedback. Through voltage information of an auxiliary winding, the output voltage feedback quantity of the current period is adjusted according to the output voltage feedback quantity of a previous switching period of the flyback converter and the voltage information of the auxiliary winding of the current switching period, and thus the output voltage can be accurately sampled. The sampled output voltage feedback quantity is used for generating a switching signal for controlling a switching tube to work, and thus constant-voltage output of the flyback converter can be achieved. An additional sampling hold circuit is not needed, modularization and integration are easy to achieve, and sampling cost is reduced.

The invention discloses an efficient atomized capturing sampler. The efficient atomized capturing sampler is mainly composed of a liquid storage chamber, an atomized capturing chamber and a gas-mist separation chamber, wherein the liquid storage chamber is used for containing the absorption liquid, the atomized capturing chamber converts the absorption liquid into fine mist of which the grain size has the characteristics of aerosol size, and the gas-mist separation chamber prevents the fine mist from overflowing out the sampler. The fine mist has big-enough exchange contact surface area between the gas-liquid interface, so that the fine mist can be mixed uniformly with the pollutant in the air with high efficiency, the conversation efficiency of the pollutant from gas state to liquid state is improved effectively, and the pollutant in the air of the environment can be efficiently absorbed and captured. The sampler provided by the invention is made of glassy inert material, and is interference-free and pollution-free to the obtained sample, the sampling flow is wide in range and steady, the sample acquisition time is short, the sampling efficiency is high, and the variation of outside environment factors cannot influence sampling; and moreover, the sampler is low in sampling cost, convenient for extracting the samples, and convenient for field and indoor operations.

The present invention provides novel methods and devices for detection of pathogens or other microbes in an analyzed sample (e.g., food, industrial, pharmaceutical, botanical, environmental etc., sample). The inventive methods and devices provide for increasing the power of detection for pathogens on food surfaces, comprising increasing the number of independent, discrete samples taken during the sampling procedure. The inventive sampling device reduces sampling costs by minimizing time, material and product loss relative to prior art sampling techniques. In particular aspects, a novel surface sampling device for bulk solid foods is provided that operates to remove (e.g., shave) small pieces from contacted product (e.g., product pieces). The device comprises a sampling mechanism having utility to remove samples (e.g., cut slivers from) larger pieces of food or other sample materials. In particular embodiments, the device comprises a primary shaft member (e.g., cylindrical stainless steel), and a shaving means.

The invention discloses a multi-channel isolated high-speed intelligent transmitting-receiving device and method for a power electronic system. The device comprises transmitting units, receiving units and isolated transmission mediums. Each transmitting unit comprises a data sampling and signal conditioning module, an A / D (Analog / Digital) conversion module, a transmitting main control unit and a transmitting unit signal conversion module; each receiving unit comprises a receiving unit signal conversion module, a receiving unit signal conditioning module, a receiving main control unit and a memory output module. The device can perform digital coding on multi-channel analog sampling and switch sampling, and transmits through the isolated transmission mediums; each receiving unit can be connected with a plurality of the transmitting units for simultaneously decoding. The multi-channel isolated high-speed intelligent transmitting-receiving device has the advantages of prominent high-reliable electrical isolation performance, instantaneity and intelligent performance.

The invention relates to a device and a method for preparing an undisturbed soil sample of a ring cutter. The device comprises a work table, a support column, a soil sample lower backing plate, a force transmission frame, a pressing head, a lever, a spring clip and other common tools for preparing the soil sample, wherein the preparation materials can be steel, aluminum, alloys and the like. By utilizing the device and the method, the original sample of the ring cutter is prepared under a condition that a sample box is not completely opened, so that an opportunity that the soil sample is damaged in the preparation process of the sample is effectively reduced; for soil samples of loess, cracked clays and the like which are easily cracked, the ring cutter sample with high quality can be prepared, and the sample manufacturing success ratio is high and the scrap ratio is low; and for sand soil with low cohesive force, the original sand soil sample can be sampled by a common soil taking device so as to further prepare the undisturbed soil sample of the ring cutter.

The invention discloses a pretreatment method for simultaneously purifying persistent organic pollutants of multiple classes in an environmental medium. The method comprises the following steps: filling silica gel, alkaline silica gel, silica gel, acidic silica gel, silica gel, copper powder and anhydrous sodium sulfate into a sand core-containing purification column with an inner diameter ranging from 10mm to 12mm from bottom to top in order to obtain a self-prepared compound silica gel column; purifying and eluting an environmental medium sample containing the POPs (Persistent Organic Pollutants) of three classes, including organo-chlorine pesticides, polychlorinated biphenyls and dioxins by using the self-prepared compound silica gel column for the first time to obtain the concentrated liquor of primary purification and elution; selecting a packed column having the inner diameter ranging from 8mm to 12mm, and filling glass wool, anhydrous sodium sulfate, activated carbon dispersed silica gel, anhydrous sodium sulfate and glass wool into the packed column from bottom to top in order to obtain a self-prepared activated carbon dispersed silica gel column; and carrying out purification and elution on the concentrated liquor of primary purification and elution obtained in the step 2 by using the self-prepared activated carbon dispersed silica gel column obtained in the step 3, and orderly separating to obtain an eluate containing the POPs of each class in the environmental medium sample containing the POPs of three classes.

The invention discloses a weak supervision LSTM recurrent neural network rice field identification method based on time sequence multispectral and microwave remote sensing data, and the method comprises the steps: constructing an SAR standard time sequence curve based on ground measured data, carrying out the DTW distance calculation of SAR time sequence remote sensing data, carrying out the sample labeling according to the DTW distance, constructing a high-confidence weak label sample set; and fusing multispectral and SAR input features, training a deep learning classifier based on LSTM by adopting a training set of a weak label sample and an actual measurement sample, and extracting rice classification in a prediction result as a final rice field identification result. The method can be used for pixel-level rice field identification and prediction, high-confidence training data can be obtained through annotation of the DTW distance of the SAR curve, dependence on ground sampling data is reduced, and the ground sampling cost can be effectively reduced.

The invention discloses a downhole rock debris extraction system and a control method thereof. The control method comprises the steps that a ground control module determines a first corresponding relation between depth information of the well depth and time in real time, and then marker jet information is sent down to a downhole marker module; according to the marker jet information, the downholemarker module sprays markers onto rock debris produced by excavation through an excavation bit; the ground control module determines a second corresponding relation between marker jet time and the types of the markers in real time, a ground detection and extraction module is controlled to carry out marker detection on the extracted rock debris, and the types of the markers are determined; the ground control module determines original depth information corresponding to the rock debris according to detection results, the first corresponding relation and the second corresponding relation; and therequirements of high detection ageing and simple and easy operation for downhole rock debris extraction can be effectively met, and meanwhile, the control method can achieve the purpose of accurate sampling, low sampling cost and high completed amount.

A pressure-maintaining fixed-point sealed collecting method for an underground coal mine nearly-horizontal long-distance coal sample comprises: using a nearly-horizontal coal seam to explore a directional hole so as to find out fluctuation law of the coal seam in a sampling area so that the design of sampling points and sampling directional holes is finished; then, carrying out directional drilling based on segment to ensure that the directional holes are drilled to the sampling points along a design trajectory; using a pressure-maintaining sealed sampling drill to carry out sampling drilling and coal sample pressure-maintaining collecting until coal sample collecting of all the sampling points is finished. In the method, the advantages of directional hole drilling trajectory real-time measurement and control and long-distance drilling and the pressure resisting and sealing characteristics of a pressure-maintaining sealed sampling apparatus are made full use, collection depth of an underground nearly-horizontal coal sample is increased, sampling precision can also be precisely controlled, single-hole multiple fixed-point sampling is achieved, pressure-maintaining sealing can be provided for a collected coal sample, gas escape is avoided, coal seam gas parameter testing accuracy is guaranteed, and accurate reference basis is provided for coal mine engineering design and evaluation.

The invention relates to a radar clutter identification method based on a convolutional neural network. The method comprises the steps of obtaining clutter data; Dividing the clutter data into training data and test data; Constructing a convolutional neural network; Using the training data to train the convolutional neural network; Testing the trained convolutional neural network by using the testdata; And when the recognition accuracy of the convolutional neural network is greater than a preset accuracy, obtaining an optimal convolutional neural network. According to the method provided by the invention, the clutter data is processed and input into the convolutional neural network, and implicit feature extraction is carried out on the clutter data by utilizing the convolutional neural network, so that the feature extraction efficiency is improved; By reducing the number of clutter data, the sampling cost is reduced, and meanwhile, the recognition efficiency is improved; The convolutional neural network is used to classify and identify the clutter data, the identification accuracy rate reaches 99.51%, and the identification accuracy rate is greatly improved.

The invention relates to a split combined type sampling bottle for collecting a water sample containing a volatile substance and an oxygen-sensitive substance. The split combined type sampling bottle structurally comprises a bottle body, a bottle cover, a pressing plate and a protection cap, wherein the bottle body is formed by an upper bottle body and a lower bottle body which are in folding threaded connection; an O-shaped sealing ring is arranged at a joint; bottlenecks are respectively formed in the upper bottle body and the lower bottle body. By adoption of an upper and lower split combined structure and an upper-bottleneck and lower-bottleneck structure, the sampling bottle disclosed by the invention can realize a specific sampling mode down water feeding and up air exhausting; in a process of injecting the water sample into the bottle, a water outlet end pipe is not needed to be plugged into the sampling bottle, so that interference caused by manmade factors is avoided, and the fidelity of the sample is improved; in a water sample collection process, the rise speed of the water level in the bottle is steady, and is slowly changed; meanwhile, air in the bottle is exhausted, and the pressing plate is closed until the bottle is full of water and water overflows, so that the redundant water sample is discharged, and no redundant space cannot be retained in the bottle; therefore the single sampling success rate is high, and the working efficiency is improved.

The invention relates to an electric remote control boat for water quality sampling and flow measurement. The electric remote control boat comprises a boat body, wherein the boat body is internally provided with remote control equipment, a battery and measuring equipment; a power source is arranged at the tail part of the boat body. The electric remote control boat is characterized in that an undercarriage groove is formed in the bottom surface of the boat body; a tubular undercarriage is mounted in the undercarriage groove; a connection end of the undercarriage is mounted in the undercarriage groove through a horizontal rotary shaft; when the undercarriage rotates around the rotary shaft, the undercarriage is retracted into the undercarriage groove or vertically stretches out from a boat bottom; the rotary shaft is connected with an output end of a rotary motor in the boat body; more than one sampling bottle is arranged in the boat body; each sampling bottle is connected with a liquid pump; an input pipe of each liquid pump stretches into the other end of the undercarriage from the connection end of the undercarriage; and an output pipe of each liquid pump stretches into the corresponding sampling bottle.

An automatic water sampler is disclosed. The automatic water sampler of the present invention comprises: a driving unit operated according to the pressure measured by a pressure sensor; a driving magnet approaching a driven magnet according to the operation of the driving unit; and a first wire unlocked by a control rod according to the movement of the driven magnet. The present invention can provide an automatic water sampler, which improves inaccuracy due to conventional interference of an ocean current, flow velocity, and the like, and manual water sampling by depth by automatically sampling water at the correct depth recognized through a pressure sensor, thereby enabling reliability and accuracy of a sample to be ensured and sampling expenses to be remarkably reduced.

The invention discloses an unmanned aerial vehicle for water-detecting sampling. An unmanned aerial vehicle body is arranged on an installation frame through an installation plate, and threaded holeswith the same bore diameter are separately formed in the installation plate and the installation frame in a corresponding mode, and the installation plate is fixedly arranged on the installation framethrough a fastening bolt in a threaded connection mode. A through hole is formed in a rotary table and a rubber plug is arranged in the through hole, a test tube placing slot with the same bore diameter as the through hole of the first rotary table is formed in a second rotary table, a gravity sensor is arranged at the bottom of the test tube placing slot, and a cushion pad is arranged between the gravity sensor and a test tube. A sliding slot is formed in the installation frame, a sliding block is connected into the sliding slot of the installation frame in a sliding mode, a rack is welded on the upper surface of the sliding block, the rack and a gear are connected on the installation frame in an engaged mode, and a transverse plate is arranged on the lower surface of the sliding block.

The invention discloses an automatic seawater sampling unmanned aerial vehicle and a working method thereof, and relates to the technical field of unmanned aerial vehicles. The automatic seawater sampling unmanned aerial vehicle comprises a vehicle body and further comprises four fixing rods arranged on the outer wall of the vehicle body, driving fan blades are fixedly installed at the ends, away from the vehicle body, of the four fixing rods, and an inlet and outlet is formed in the top of the vehicle body. The unmanned aerial vehicle is adopted for sampling, sampling personnel do not need to take a sampling ship to go, manpower and time can be saved, the sampling cost can be reduced, during sampling, a sampling device can be placed at different sampling depths for sampling, multiple sets of seawater can be collected for the same depth, the analysis accuracy of the sampled seawater can be guaranteed, the sampling efficiency is improved, during sampling, the unmanned aerial vehicle floats on the sea surface through a floating body, driving of the fan blades to operate can be stopped, electric power is saved, after sampling, seawater can be taken out by rotating a hand wheel, taking down the sampler and unscrewing an upper pipe body and a lower pipe body, and use is convenient.

The invention discloses a pilot-based low complexity compressed sensing channel estimation method. The method comprises the following steps: setting pilot positions based on a randomized distributionprinciple according to a compression sensing algorithm, performing a cross-correlation operation on the local pilot signals and the received pilot signals at the receiving end, estimating the channelsparsity and delay distribution of non-zero sparsity paths by using the cross-correlation operation result, using the obtained estimated value as a preset value of the compressed sensing algorithm andan initial value of the iterative operation, obtaining a channel estimation result by combining the low complexity compressed sensing reconstruction algorithm, and completing the DFT-based time domain interpolation algorithm for the estimation of the channel information of data positions. The method uses compressed sensing channel estimation for complex wireless channels to reduce pilot overheadand improve spectrum utilization, uses randomized pilot position distribution to reconstruct signals with higher probability, and uses cross-correlation operation of pilot signals at the receiving endto estimate the delay distribution of channel sparsity and non-zero sparse paths, which can reduce the number of iterations and greatly reduce the complexity of the algorithm.

The invention provides a lime-soil compaction pile sampling device and method. The sampling device comprises a jack sampling frame, a transmission guide rod, a fixed rod and a sampling knife; the jacksampling frame comprises a four-connection-rod support, a lead screw, a base plate connected with one side of the four-connection-rod support and a carry plate connected with the other side of the four-connection-rod support; the lower end of the transmission guide rod is connected with the upper end of the lead screw; the lower end of the fixed rod is fixedly connected with the base plate; the sampling knife comprises a first cutting ring and a second cutting ring coaxially fixed on the carry plate; the diameter of the first cutting ring is more than that of the second cutting ring, and thefirst cutting ring is sleeved on the second cutting ring; and the length of the first cutting ring is more than that of the second cutting ring. With the application of the sampling device provided bythe invention, the needed sampling hole is small, meanwhile, the sampling personnel does not need to punch for sampling, the security risk caused by manual punching for sampling is avoided, and the sampling cost is greatly reduced. After sampling is completed, the sampling hole only needs to be filled with sand, and backfilling is relatively simple.