128results about How to "Guaranteed Extraction Effect" patented technology

The invention discloses a method for increasing the permeability of a low-permeability coal seam by means of deep-hole directional pre-splitting blasting. The method includes constructing large-diameter blast holes in the high-gassy low-permeability coal seam in a conventional operation mode; using four-way perpendicular joint-cutting pipes as blasting explosive charging pipes and water bag charging pipes; arranging the four-way perpendicular joint-cutting pipes loaded with explosive cartridges and the four-way perpendicular joint-cutting pipes loaded with water bags at intervals to fill explosive into the blast holes, and detonating the explosive in each blast hole by double detonating fuses to complete operation for increasing the permeability of the low-permeability thick coal seam. Longitudinal cut joints are respectively circumferentially formed at a 0-degree position, a 90-degree position, a 180-degree position and a 270-degree position of each four-way perpendicular joint-cutting pipe. The method has the advantages that crack networks which are communicated with one another can be formed in the coal seam after blasting, the permeability of the low-permeability high-gassy coal seam can be improved, a gas extraction effect is guaranteed, the gas extraction efficiency is high, and gas disaster accidents can be prevented to a certain degree.

The invention provides a regional forced gas extraction method for a single low-permeability outburst thick coal seam. The regional forced gas extraction method comprises the steps of (a) excavating a rock gangway in a rock fissure zone and drilling a lower-position seam through hole downwards, (b) drilling a high-position seam through hole downwards in the rock gangway, (c) starting a high-pressure water-injection pump station, performing hole expanding operation on the coal seam through sections of the drilled holes under the conditions of the water pressure of 10-20MPa, the flow rate of 8m<3> / h and the single-hole coal output greater than 5t, (d) sealing the drilled holes and carrying out drainage strip networking extraction operation after the hole expanding operation is finished, (e) after the extraction is up to the standard, carrying out tunneling operation of an air return way and a transportation roadway, and meanwhile, drilling a bedding pre-extraction hole in the working face and carrying out the hole sealing and networking extraction operations, and (f) continuously extracting the gas of the goaf in the rock gangway during the recovery of the working face. The regional forced gas extraction method is capable of converting a high-gas outburst coal seam into a low-gas outburst risk-free coal seam, comprehensively guaranteeing safe production of the working face, and meanwhile, obviously increasing the coal roadway tunneling speed.

The invention relates to an LSTM and CNN based tool wear state predicating method and device. The method comprises the following steps: acquiring original data in a machine tool processing process, wherein the original data comprise machine tool vibration data, tool cutting force data and high-frequency stress wave data; inputting the original data into an LSTM network, and extracting time sequence characteristics of the original data; inputting the original data with time sequence characteristics extracted into the CNN network, and extracting multi-dimensional characteristics comprising the time sequence characteristics from the original data; and calculating to obtain a tool wear predicated value based on the multi-dimensional characteristics comprising the time sequence characteristicsand a set mapping relationship. The invention further discloses an LSTM and CNN based tool wear state predicating device. According to the LSTM and CNN based tool wear state predicating method and device disclosed by the invention, the extraction effect on the data multi-dimensional characteristics and the time sequence characteristics can be integrated, so that the tool wear state predicating effect can be improved.

The invention provides a self-adaptive valley and ridge line extraction method and system based on a scale space. The self-adaptive valley ridge line extraction method comprises the following steps: firstly, carrying out oversampling on an original DEM (Digital Elevation Model) to serve as processed initial DEM, and establishing a zeroth group of scale space according to the initial DEM; according to a total layer number of a pyramid, firstly selecting the DEM with a highest spatial scale in the zeroth group of scale space as the bottom layer of the pyramid, then, carrying out downsampling on the zeroth layer of DEM, correspondingly establishing a first group of scale space, and selecting the DEM with the highest scale as the first layer of the DEM pyramid and so on; and starting with the top layer of the DEM pyramid to carry out self-adaptive multi-angle topographic section elevation extremum method extraction, carrying out postprocessing to obtain a ridge line and a valley line, and finally, carrying out the layer-by-layer refining extraction of a result. Compared with the prior art, the self-adaptive valley and ridge line extraction method not only can give both consideration to the integral tendency and the detail change of ridge (valley) extraction, guarantees extraction precision, but also can quickly obtain an extraction result and guarantee extraction efficiency.

The invention relates to a method for separating and purifying chlorogenic acid, which is low in cost, large in yield, short in cycle and easy to industrialize. Process steps of the method include pressing, macroporous resin adsorption, membrane concentration and spray drying. The method adopted for producing chlorogenic acid has the advantages of simple process, little energy consumption and guarantee of extremely high purity.

The invention discloses a face spoofing detection method and system based on color channel difference image features. The method comprises the following steps: selecting a face image after preprocessing video data; extracting the face image to obtain a plurality of color channel images; calculating a difference value between the color channel images to obtain a plurality of color channel difference value images, and performing normalization processing to obtain a normalized color channel difference value image; adding the set attention module into a deep convolutional neural network to construct an attention network; combining the cross entropy loss and the verification loss into a total loss through weighting; inputting the normalized color channel difference graph into an attention network for noise feature learning, updating a network weight coefficient according to a loss value, training the attention network, and storing a model and a weight of the attention network after trainingis completed; and predicting a classification result by the trained attention network. According to the method and system, the spoofing noise characteristics can be accurately extracted, and the generalization ability of the face spoofing detection model is improved.

The invention discloses a low permeability coal bed supercritical carbon dioxide anti-reflection system and method. The anti-reflection system comprises an extraction pipe and an injection pipe, wherein the extraction pipe and the injection pipe are sleeved with a hole packer, an extraction device is connected to the outer end of the extraction pipe through an extraction pipeline, and an extraction stop valve and a main extraction stop valve are sequentially arranged between the extraction pipe and the extraction device; an injection stop valve, an injection supercritical carbon dioxide pump, a thermostat and a carbon dioxide gas tank are sequentially connected to the outer end of the injection pipe through an injection pipeline, a high-pressure buffer tank is arranged in the thermostat, and a temperature sensor and a gas injection pressure gauge are connected to a four-way valve. The anti-reflection system is reasonable and simple in structure, convenient to implement, safe and reliable, and capable of improving the permeability of a coal bed greatly. By the adoption of the anti-reflection method, the original pore structure of the coal bed can be changed, the permeability of the coal bed can be improved greatly, coal bed gas output efficiency can be improved, extraction effect can be improved greatly, the outburst danger of the coal bed can be effectively reduced, and safe production of a coal mine can be ensured.

The invention discloses a coal rock upward borehole gas parameter measurement method. Firstly, upward drilling is carried out on a coal bed in a coal rock roadway, and the borehole is as deep as to the coal bed; then, a detecting and receiving device is arranged, the detecting and receiving device comprises a first pipe body, a second pipe body and a third pipe body connected in sequence, the upper surface of the tail part of the third pipe body is uniformly provided with a plurality of columns of pipe holes at intervals, a cylindrical iron ring is sleeved between adjacent columns of pipe holes, and a drilling rig is used for sending the third pipe body to the bottommost part of the borehole; a sealing device is used for sealing the borehole, a concrete sealing material is combined to carry out sealing processing on the remaining part; a pressure-resisting test is carried out to test borehole sealing effects; and after qualified test, a measurement device is used for measuring gas parameters. Influences on measurement of the gas parameters as the traditional soft coal rock upward borehole is likely to collapse can be well overcome, and the method is particularly suitable for gas parameter measurement in the soft coal rock upward borehole.

The invention discloses an urban intelligent extraction method, system and device based on remote sensing image scene segmentation. The method comprises the following steps: 1, segmenting a high-resolution remote sensing image according to road network data, and generating a block-level scene image for deep learning scene classification; step 2, initially dividing and marking urban and non-urban samples according to government locations and image features of all regions of a city, and generating a sample set containing a training set, a verification set and a test set; 3, selecting artificialfeatures, fusing the artificial features with the convolutional neural network and the features thereof, and classifying urban block scenes; 4, constructing a pyramid grid according to the scene classification result, and judging the urban internal block plaques, the surrounding plaques and the grid classification result; and step 5, iterative training and scene classification are performed on thesample set until all sample categories are determined and an urban area range is obtained, so that the effect and precision of urban area extraction are ensured.

The invention discloses a poppy processing device for promoting seed discharging on the basis of dynamic hull breaking and repeated turnover and relates to the technical field of poppies. The poppy processing device for promoting seed discharging on the basis of dynamic hull breaking and repeated turnover comprises a machine body; a driving motor is fixedly mounted at the top of the machine body;an output shaft of the driving motor runs through the internal top of the machine body and is connected with a transmission mechanism; the transmission mechanism is arranged at the internal top of themachine body; the left and right sides of the transmission mechanism are correspondingly connected with two hull breaking stirring mechanisms; and the two hull breaking stirring mechanisms are fixedly mounted on the left and right sides of a cavity of the machine body. The poppy processing device for promoting seed discharging on the basis of dynamic hull breaking and repeated turnover, disclosedby the invention, has the advantages that a traditional processing method for manually extracting the seeds is replaced by arranging the driving motor and the transmission mechanism under the coordination of the hull breaking stirring mechanism, a swinging mechanism and a reciprocating motion mechanism; and a problem that in the prior art, a poppy seed extracting processing device is lacked is solved.

The invention discloses a method for extracting valuable metals from fumes in a steel plant. The method comprises mixing or pelleting blast furnace gas ash (mud) and the steel-making fumes (mud) recovered from steel smelting to obtain a mixture or pellets, putting the mixture or pellets into a vacuum reduction heat storage furnace, carrying out heat preservation at 600-1300 DEG C at a vacuum degree of less than 100Pa for 0.5-6h to obtain a reduced mixture, and carrying out magnetic separation on the mixture to obtain refined iron ore. Through reasonable control of the carbon content of blast furnace gas ash (mud), the ratio of the blast furnace gas ash (mud) to the steel-making fumes (mud) and the temperature, pressure and time in the vacuum reduction process, the separation of valuable metals such as zinc, lead and indium and the comprehensive recovery of iron oxides are achieved in the vacuum reduction heat storage furnace. The whole process is carried out in the vacuum reduction heat storage furnace, produces the small influence on personnel and environment, needs simple processes and devices, is safe and controllable, is easy to operate and can effectively realize the comprehensive recovery and recycling of secondary resources of valuable metals in steel dust.

An outburst prevention method in rock cross-cut coal uncovering and gas outburst coal seam double-curtain grouting is suitable for being used in a mining work face. When the minimum excavated normal distance from a rock cross-cut coal uncovering work face to a coal seam is no less than 7m, two circles of cross-measure grouting holes inclining to the outer side of a cross cut are drilled in the front side of the rock cross-cut coal uncovering work face in the coal seam direction, cement mortar are injected into the cross-measure grouting holes, two gas leakage prevention curtains are manufactured in coal around the rock cross-cut coal uncovering work face to prevent gas around the cross cut to move to the direction of the cross cut, and then the cross-measure grouting holes are used for pre-vacuum of gas in the coal seam in front of the cross cut to reduce pressure and content of the gas. The method is simple and easy to achieve, short in working hour, safe, efficient and low in cost.

The invention discloses an image segmentation based car window extraction method and system. The method comprises the steps of normalizing an obtained vehicle image to obtain a normalized image; performing undirected graph based image segmentation processing on the normalized image; according to a distance between a mass center of each region and a mass center reference point, sorting regions in the upper half parts of the segmented images, then adding the regions into a cache image in sequence according to a sorting result, calculating the regional boundary fluency of the cache image in real time by adopting a first-order difference of a Freeman chain code, and extracting candidate car window regions according to the regional boundary fluency of the cache image; and according to a set car window region judgment basis, screening out a final car window region from the candidate car window regions. According to the method and system, the undirected graph based image segmentation method is adopted, so that the anti-jamming capability is good and the robustness is high; and meanwhile, the extraction effect and accuracy of the car window region are ensured. The method and system can be widely applied to the field of image processing.

The invention discloses a method for detecting residues of chloramphenicols in milk products. Chloramphenicols include chloramphenicol, thiamphenicol and florfenicol. The method comprises the following steps: carrying out pretreatment on a to-be-detected sample: weighing m1g of the to-be-detected sample, adding v1ml of ethyl acetate for extraction to obtain a first extract, dissolving the first extract by virtue of v2ml of methanol, adding v3ml of normal hexane, mixing uniformly, carrying out centrifuging, abandoning superstratum to obtain a second extract, and purifying the second extract by virtue of a solid phase extraction column, so as to obtain purified substances; analyzing the purified substances by virtue of a liquid phase-tandem mass spectrometer, and detecting the residues of the chloramphenicols in the to-be-detected sample, wherein m1 is less than or equal to 5, v1 is less than 20, v2 is less than 1, and v3 is less than 8. According to the method, an interior label is not required, so that an emulsification phenomenon in the detection process can be avoided, and the interference caused by a matrix to the detection can be reduced; chloramphenicol drugs can be simultaneously detected, the sensitivity and the recovery rate are high, the cost is saved, and the operation is easy.

The invention discloses an observation system used for ascending drilling gas pressure of mine coal rock, comprising a detecting and receiving device, a plugging device and a testing apparatus, wherein the detecting and receiving device is arranged in a borehole, the tail part of the detecting and receiving device is connected with the plugging device; the detecting and receiving device comprises a main pipe, a detecting pipe, a rubber soft ball, a baffle and a U-shaped baffle; the detecting pipe is arranged at the front part of the main pipe and can swing with small angle in a certain range; a plurality of extracting holes are formed in the front part of the detecting pipe, the tail of the detecting pipe is a spherical capsule, circular holes for gas to flow out are distributed in the surface of the spherical capsule; the baffle and the rubber soft ball are sequentially arranged at the tail part of the detecting pipe; the baffle is located at one side close to the spherical capsule; and the U-shaped baffle is inversely buckled at the front part of the detecting pipe. The system can well overcome the influence of the prior art that gas parameters cannot be further tested because an ascending borehole of the soft coal rock is easy to collapse, is especially applicable to testing on gas parameters in the ascending borehole of the soft coal rock, and can ensure accurate testing on gas extraction of the soft coal rock and the gas parameters.

The invention discloses a mined-out area air leakage field optimization based coal and gas symbiotic disaster control method. The mined-out area air leakage field optimization based coal and gas symbiotic disaster control method comprises the following steps: A, determining a crack field distribution range of a mined-out area and a rock stratum coated thereon, thereby determining a height range ofa drilled position; B, determining a reasonable gas extraction way according to the crack field distribution range and existing mine geological data; C, determining a drilling field distribution condition; D, monitoring working face gas concentration and CO concentration, and detecting air leaking speed of the mined-out area; E, regulating extraction negative pressure of an extraction main pipeline and setting gas sensing; F, determining coal spontaneous combustion and gas explosion coexistence possibility epsilon of air leakage speed and gas concentration; and G, obtaining practical extraction negative pressure of the coal mine according to the determined safety range. The mined-out area air leakage field optimization based coal and gas symbiotic disaster control method disclosed by theinvention determines extraction negative pressure of a coal bed by considering a mined-out area flow field change condition, so that mined-out area air leakage field is optimized, and therefore, the coal and gas symbiotic disaster control purpose can be realized while gas extraction effect is guaranteed.

The invention discloses a construction method for high-level large-diameter directional drilling of a complex roof. The construction method comprises the steps that a hole is drilled from a positive angle in a coal seam, and a guide directional hole of a casing hole section is drilled to penetrate through a roof and a weak broken layer to reach a stable extraction layer; then counterboring is performed along the guide directional hole of the casing hole section to the bottom of the hole; a protective casing is lowered from a hole opening to protect a hole section of the weak broken layer; holesealing materials are injected into the annulus of the protective casing and the drill hole wall to seal the protective casing; a measurement-while-drilling directional drilling tool assembly penetrates through the casing hole section, and drills a guide directional hole of a main extraction hole section to the design hole depth along a design trajectory; and the measurement-while-drilling directional drilling tool assembly is removed, and counterboring is carried out on the basis of the guide directional hole of the main extraction hole section, and hole drilling is finished in the form of open holes. Therefore, the difficulty in hole drilling and forming and interruption of borehole gas extraction due to the collapse of the hole wall of the weak broken layer during the construction of the main extraction hole section and in the later extraction process are avoided, the large-diameter counterboring is further implemented on the main extraction hole section by penetrating through thecasing hole section, and the gas extraction effect is improved.

The invention discloses a traditional Chinese medicine extraction device, which comprises a box body and a heating mechanism arranged in the box body, wherein a filter plate is fixed to the lower portion of the inner cavity of the box body, a vertical rotating shaft is rotatably connected in the box body, the rotating shaft is driven by a rotation driving mechanism, a first stirring blade and a second stirring blade are fixed on the shaft body of the rotating shaft, swing rods are located above the filter plate and rotatably connected with the second stirring blade through pin shafts, a connecting rod is hinged between the two adjacent swing rods, a movable magnetic block is fixed on the outermost swing rod, a circle of fixed magnetic blocks distributed at equal intervals in the circumferential direction are fixed to the positions, corresponding to the movable magnetic blocks, of the inner wall of the box body, and the fixed magnetic blocks comprise first magnetic blocks and second magnetic blocks which are distributed at intervals. According to the invention, a plurality of the swing rods are arranged on the second stirring blades, and the swing rods swing back and forth in the rotating process under the matching action of the movable magnetic blocks and the fixed magnetic blocks, so that medicinal materials on the filter plate are turned over, accumulation of the medicinal materials is avoided, and the extraction effect is guaranteed.

The invention provides a pipeline. Through the arrangement of branch pipes which communicate with a main pipe and are arranged at certain angles and provided with a plurality of second air holes, the effective extraction or injection area of the main pipe is expanded in the horizontal direction perpendicular to the extending direction of the main pipe or in the direction inclined by a certain angle relative to the horizontal direction from the area around the pipe-diameter portion in the extending direction (the vertical direction) of the main pipe in the prior art, so that the overall extraction or injection area of the pipeline is effectively enlarged, and the gas extraction or injection capacity is improved.

The invention discloses a keyword extraction method based on deep learning language model fused with semantic features, and belongs to the field of keyword extraction research in text processing. Themethod includes: processing a target text by using a text processing tool and only reserving adjectives and nouns in the target text to serve as candidate keywords of the target text; inputting the candidate keywords into a pre-training language model to obtain vector representation of each candidate keyword, performing sentence segmentation processing on the target document, similarly inputting the target document into the pre-training language model by taking sentences as units to obtain vector representation of each sentence, and for each candidate keyword, and calculating the mean value ofthe similarity sums of the candidate keywords and each sentence in the text, taking the mean value as the final score of the candidate keywords, and finally sorting the candidate keywords according to the scores of the candidate keywords to obtain the keywords of the text.

The invention discloses a method for extracting and simplifying a three-dimensional road model, which comprises the following steps of: obtaining a multi-patch reference surface in a model of road elements to be extracted, constructing a hexagonal bounding box and orthogonally projecting the hexagonal bounding box to two dimensions, and greatly simplifying the operation difficulty of road sketching in a complex three-dimensional scene under the condition of retaining color and depth information, and the corresponding space and texture coordinates are obtained according to the road extraction area, so that the effect of automatically constructing the road model is achieved. According to the method, the original manual visual interpretation work is replaced by a computer space resolving technology, so that the extraction efficiency and accuracy of the road elements in a large-scale three-dimensional scene are effectively ensured.

The invention provides a method for enhancing permeability and promoting drainage by combining hydraulic hole making and hole drilling heat injection in a mining-coal bed. The method comprises the following steps that crossheading drilling is carried out on a working face crossheading, wherein the distance between every two adjacent drill holes is 7-10m, and any two adjacent drill holes are namedas a heat injection hole and a drainage hole respectively; drainage pipes are arranged in the drill holes, and a special hole packer is sent into the second drainage pipe for hole sealing; high-temperature and high-pressure nitrogen is injected into the heat injection holes through the special hole packer, the adjacent drainage holes are always in normal gas drainage, and gas escaping from heatedcoal is pumped away in time; the drainage pipes in the heat injection holes are connected with a drainage system for gas drainage work, and the gas drainage effect is further enhanced. In conclusion,the method is scientific in principle, tight in hole sealing, safe and reliable, the heat injection improving drainage promoting effect is greatly enhanced by combining hydraulic punching; and the method can be widely applied to rock cross-cut coal uncovering, fault crossing, permeability enhancement and drainage promotion of excavation working faces, enhanced gas drainage and other work and is wide in application prospect.

The invention discloses a gas pressure measuring system for a mining-induced fracture field of a coal seam. The gas pressure measuring system comprises an exploration and collection device, a pluggingdevice and a measuring device. The exploration and collection device is installed in a borehole, and the plugging device is used for sealing the borehole. The exploration and collection device comprises a first pipe body, a second pipe body and a third pipe body, wherein the third pipe body extends into the bottom of the borehole, and the first tube body is located on the outermost side of the borehole. The plugging device comprises a plugging capsule, a capsule connecting pipe and a capsule operating platform. The measuring device comprises a gas pressure gauge, an electronic pressure measuring instrument and a gas collecting analyzer, wherein the gas pressure gauge, the electronic pressure measuring instrument and the gas collecting analyzer are connected in sequence, wherein the gas pressure gauge is connected to the front portion of the first pipe body. According to the gas pressure measuring system for the mining-induced fracture field of the coal seam, the stress of a mining-induced fracture of the coal seam can be analyzed, an excavation position is marked, so that the formation stress and gas seepage pressure are calculated, thus the occurrence of coal mine gas dynamic disasters are effectively prevented, and the gas pressure data can be automatically and periodically recorded, stored and transmitted.

The invention discloses a method for reinforcing gas extraction through coal seam drilling jet fracturing and mining pressure cooperated effect. According to a mining pressure time-space distributionrule caused in the underground roadway excavating and stope face stoping process, pre-extracted gas drilling reasonable positions, perpendicular to a stope face, of sides of an air inlet roadway and an air return roadway of a working face are determined; and according to the mining pressure time-space distribution rule and fracturing parameter design in front of the working face, a fracturing extracting integrated drilling position, a grouped fracturing length, segmented fracturing intervals and other technical parameters perpendicular to the direction of the stope face are determined, and thehydraulic jet fracturing technology is used for carrying out retreating type grouped segmented fracturing on a coal seam. Under the fracturing effect and mining pressure cooperated coupling effect, afracturing fracture can be further expanded, the large-range area coal seam precise, uniform and full-covering dual pressure relief permeability improvement effect is achieved, and pre-extracted gasdrilling and fracturing extracting integrated drilling are used for achieving coal seam fracturing and gas efficient safe extraction.

The invention belongs to the technical field of cosmetics, and provides an edible-grade anti-wrinkle and anti-aging sodium-hyaluronate essence. The edible-grade anti-wrinkle and anti-aging sodium-hyaluronate essence is mainly prepared from raw materials of disodium edetate dihydrate, butanediol, acrylic acid (ester) / C10-30-alkanol-acrylate cross-linked polymers, triethanolamine, sodium hyaluronate, chamomile extract and the like in a set ratio. The invention further provides a corresponding method for preparing the essence. The essence is natural and safe, can be at the edible grade, is friendly to the human body without stimulation, cannot affect the human body health after long-time taking, and has the excellent anti-wrinkle and anti-aging effects. According to the preparing method, the useful active ingredients in chamomile are extracted to the greatest degree, and the functional effects of the finally-prepared essence are guaranteed and improved.

The invention relates to a method and a system for extracting trigger words in a text announcement. The method comprises the following steps: step 1, the whole content of the text announcement is divided into sentences through punctuation marks to obtain a plurality of sentences; 2, divide each sentence into a plurality of words, match that plurality of words with the triggering words in the preset dictionary, and converting the match same word into the same symbol with different serial numbers in sequence; 3, inputting each sentence processed in the step 2 into a trigger word extraction model, and outputting a probability value of each word to be a trigger word, wherein a word with a probability value greater than or equal to 0.5 is a trigger word. The method and the system of the invention can extract the trigger word of the event accurately, and the adaptive light can be applied to the trigger word extraction of various events.

The embodiment of the invention discloses a gas extraction monitoring method, system and equipment and a readable storage medium. The method comprises the steps that an image of a gas extraction working face area is collected; when a grouting machine starts to grout a drill hole, a numerical value displayed by a positive pressure meter used for monitoring the positive pressure of the grouting machine in the image and whether grout flows out of the drill hole or not are recognized through a target detection algorithm; when that the grout flows out of the drill hole is recognized, a drainage andexhaust pipe valve closing control instruction is sent to the grouting machine or prompt information is generated; when that the numerical value displayed by the positive pressure meter reaches a setvalue is recognized, a grouting stop instruction is sent to the grouting machine; and when an extraction pipe starts to extract gas, a numerical value displayed by a negative pressure meter used formonitoring the negative pressure of the extraction pipe in the image is recognized based on the target detection algorithm. An artificial intelligence technology is utilized to play an intelligent supervision role in the gas extraction process, and the drill hole blocking and gas extraction effects are ensured.

The invention discloses a method for efficiently and quickly extracting crop genome DNA (DeoxyriboNucleic Acid). The method specifically comprises the following steps: putting a root system, a seedling or a leaf which grows after the single seed of a crop sprouts into a container, and adding an alkaline solution and steel balls to carry out grinding pyrolysis so as to obtain homogenate; adding Tris buffered solution into obtained lysate, and collecting upper-layer clear solution. Compared with a traditional alkaline pyrolysis method, the method disclosed by the invention is characterized in that TritonX-100 solution or NP40 solution are added in an alkaline grinding pyrolysis process to more simply and quickly extract DNA, extraction quality is higher, and an extraction effect is better. Since the Tris buffered solution is added, an influence for subsequent PCR (Polymerase Chain Reaction) since the pH (Potential of Hydrogen) value of the extracted DNA solution is overhigh or overlow can be avoided, and only two solutions need to be added to extract high-quality DNA; a high-temperature water bath process is omitted, and the efficient extraction of the DNA can be realized only through two steps. The method established by the invention is suitable for the quick detection of the purity, the authenticity and the transgenic ingredients of the single seed of the crop and the auxiliary selection research of the key character molecular marker of the crop.

The invention discloses a self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method based on ultrasonic waves. The self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method comprises the steps: a permeability-increasing drill hole driven in a coal seam in a high-position drainage roadway, and the permeability-increasing drill hole is sealed through two hole sealing bags and grouting; water is injected into the deepest position of the permeability-increasing drill hole through the gravity of the water, and a one-way ball valve on a water injection pipe is closed to stop water injection at the moment when the internal water pressure exceeds the gravity of the water in the water injection pipe; the ultrasonic waves are emitted through ultrasonic vibrators, the water temperature rises and vaporizes due to the loss of the ultrasonic waves transmitted in water, the pressure of the deepest position of the permeability-increasing drill hole is increased, meanwhile, the cavitation effect is generated when the ultrasonic waves are transmitted in the water, and extremely high tensile stress is formed through generation and bursting of cavitation bubbles; under the combined action of the cavitation effect and vaporization pressurization, surrounding coal is fractured to form fractures; and in the whole process, a water pump is not needed, fracturing permeability increasing can be continuously conducted on a coal body only through combination of the gravity of the water and the ultrasonic waves, therefore the gas extraction effect on the coal seam after permeability increasing is guaranteed, and energy consumption is effectively reduced.

The invention relates to an aloe processing device, in particular to an aloe dicing device. The technical problem to be solved is how to design an aloe dicing device which is small in size, low in usecost and capable of avoiding aloe juice losses. The aloe dicing device comprises a base, a right support, a left support, a supporting frame, a hopper, a sliding framework, a sliding plate and the like; the left support and the right support are arranged on the left side and the right side of the top of the base; the supporting frame is connected between the tops of the left support and the rightsupport; the hopper is mounted at the left end of the supporting frame; The top of the supporting frame is hinged with the sliding framework; and the sliding plate is arranged in the sliding framework in a sliding manner. According to the aloe dicing device, through cooperation of a press-down grid frame and the sliding plate, aloes can be diced rapidly, the sliding plate and the grid frame can be in close contact through a reset assembly, and therefore it is guaranteed that the grid frame can completely cut off aloes.