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A system for the extraction, collection, processing and transplantation of cell subsets, including adult stem cells and platelets, in particular for tissue repair in regenerative medicine, comprises a set of disposable fluid-transport elements that are pre-connected or that include aseptic connectors for making interconnections between them in an aseptic manner or are adapted to be aseptically connected. The set usually includes three kits of disposable sterile elements, a collection kit, a processing kit, and a transplantation kit packaged in a blister pack on a support such as a tray, having one compartment for receiving each inter-connectable kit of the set. The set includes an extracting device, for example including a needle for bone puncture or vein puncture, for extracting bone marrow or other sources of cell subsets from a patient.

A display tray for specially shaped packages (e.g., sliced meat products), having flat, flexible bases and a forwardly projecting housings for the product, typically, typically with recesses in the base to accommodate nesting. A vertical frame at the front, permitting the product housing to project through while normally retaining the base and while also allowing the base to be pulled through by a customer, is known. The new tray positions this frame a sufficient distance behind a front stop of the tray to enable a customer to replace a pulled-through product into the tray, in front of the frame and a product projecting through the frame. To particular advantage, the thus-positioned frame is incorporated into a special tray insert, easily installed in a general purpose tray to accommodate the described, specially shaped packages, and easily removed from the tray to render it more suitable for the display of general merchandise.

The present invention provides a 1-thio-D-glucitol compound of the following formula, which shows the action of inhibiting the activity of SGLT2, a pharmaceutically acceptable salt of the compound, or a hydrate of the compound or the salt; and a pharmaceutical comprising such a compound as an active ingredient, especially, a pharmaceutical for preventing or treating diabetes, diabetes-related disease, or diabetic complication. The invention also provides a method for producing the 1-thio-D-glucitol compound and its intermediate.

The invention discloses a large-scaled culture method of high-concentration nitrosobacteria and application thereof. The method comprises the following steps of: (1) adding an enrichment culture solution with initial ammonia nitrogen mass concentration of 30-500mg / L in a reaction device with functions of stirring, heating and aeration; preparing activated sludge of a waste water treatment plant in activated sludge of 0.5-20% for primary inoculation to conduct the enrichment culture of the nitrosobacteria by 2-6d as a culture cycle, wherein extra ammonium salts and a growth promoter are added during the enrichment culture of the nitrosobacteria; (2) ending the culture when the concentration of NO2-N in the solution is accumulated to reach 70-95% of the concentration of total nitrogen; adding a flocculating agent for flocculation and sedimentation; and allowing to stand still to remove supernate, and then adding the enrichment culture solution to start the culture of the second cycle; and (3) continuously conducting 3-8 cycles of the enrichment culture to obtain the high-concentration nitrosobacteria. By adopting the nitrosobacteria to strengthen the bi-nitrification treatment of ammonia nitrogen contained waste water, the method has the advantages of high stress resistance, low cost and high efficiency and is suitable for the complicated treatment of ammonia nitrogen contained industrial waste water.

The invention discloses a stock market investment decision-making method based on network analysis and multi-model fusion. The method includes the steps that fundamental information is grabbed from a network and then network nodes and network connection are constructed; a complex social network model is constructed; an investment portfolio is selected by means of a network analysis method and then data involved in the investment portfolio are input into a multi-model fusion frame, wherein the multi-model fusion frame comprises a plurality of sub-models; all the sub-models conduct market trend prediction with different characteristics according to technical information of different characteristics grabbed in the network generate predicted values of the corresponding sub-models, the predicted values are weighted and summated to obtain a comprehensive market trend predicted value, and then corresponding investment strategies are generated according to the comprehensive market trend predicted value. According to the method, risk factors, which are ignored in general researches, of the investment portfolio are comprehensively considered from multiple angles, real-time requirements of the strategies are guaranteed through the methods such as dimension reduction data preselection of fundamentals and technical feature selection, and consequently the more reliable investment strategies are provided.

The invention discloses an electric system low-frequency oscillation detection method. On the basis of the existing nonlinear and non-stable signal empirical mode decomposition algorithm, the improved empirical mode screening algorithm enables the electric system low-frequency oscillation detection method to adapt to low-frequency oscillation signal processing, decomposed eigen mode components are combined with low-frequency oscillation mode physical expression meaning, and accordingly all low-frequency oscillation mode parameters of low-frequency oscillation sampling signals are recognized. The electric system low-frequency oscillation detection method reduces influence of the endpoint effect through improved mixed endpoint forecast, removes overshoot and undershoot by adopting triple B spline interpolation, simultaneously effectively reduces mode aliasing degree, analyzes and detects aliasing mode parameters through refined complex wavelets, controls algorithm screening depth through the improved energy elementary error screening stopping condition, reduces damping loss of mode components, and accordingly effectively improves low-frequency oscillation mode characteristic parameter detection accuracy.

The invention relates to a garlic wastewater treatment method and a device. The garlic wastewater treatment device comprises a wastewater regulating tank, an advanced oxidation reaction sedimentation tank, a multistage hypoxic and anaerobic reaction tank, an aerobiotic contact oxidation tank and a multilayer aerobiotic activity filtration tower, wherein the advanced oxidation reaction sedimentation tank comprises a mixing region and a sedimentation region; the multistage hypoxic and anaerobic reaction tank comprises a facultative section, a hypoxic section and an anaerobic section; an aeration controlling system is arranged at the middle lower part in the aerobiotic contact oxidation tank and comprises an aeration disc, an air blower and a dissolved oxygen measurement controlling device; and the multistage hypoxic and anaerobic reaction tank adopts multistage arrangement, particle sizes of a filter material are gradually decreased from top to bottom, an air inlet, a water collection groove and a water outlet pipe are arranged at the bottom of the filtration tower, and disinfection equipment is installed at the upper part of the water collection groove and is connected with a chloride dioxide generator. The garlic wastewater treatment device has a simple structure, is lower in manufacturing cost, is suitable for sewage treatment of larger volume and has very good treating effect to garlic wastewater.

The invention provides a method for constructing a topic web crawler system, which comprises the following steps of: (1) defining an initial description vector of a topic, setting an initial threshold value of the correlation degree and initializing a URL (Uniform Resource Locator) queue; (2) sequentially acquiring URLs from the initial URL queue to carry out crawl; (3) carrying out text analysis on the URLs; (4) carrying out link analysis on the URLs; (5) calculating the correlation degrees of the URLs with the topic; (6) adding the URLs of which the correlation degrees are more than the threshold value of the correlation degree into an ordered URL queue, sorting the URLs according to the correlation degrees of the URLs with the topic vector, carrying out crawl sequentially until the queue is empty, extracting a sub URL in each crawled webpage, and returning the step (3); (7) carrying out optimization of a genetic algorithm by using the genetic algorithm; and (8) updating the topic vector by a Rocchio feedback module, dynamically regulating the threshold value of the correlaton degree and continously crawling the webpages. In the method, a great amount of training texts do not need to be prepared in advance. The method has high speed and is suitable for processing an immense amount of on-line webpage data.

The invention relates to a catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas and a preparation method thereof and belongs to the fields of atmospheric pollution abatement technique and environment-friendly catalytic material. In the catalyst, the nickel-iron-manganese compound oxide is taken as a first active component; one or two of other transition metal, rare-earth metal or precious metal oxides are taken as a second active component; a self-made carrier or natural inorganic material carrier is taken as the carrier of the catalyst; and the contents (in percentage by weight) of the loads of the first and the second active components are respectively 5-20% and 0-10% on the basis of the weight of the carrier. The catalyst is a polymorphous catalyst, which can be spherical, columnar, starlike, bar-shaped, netty, flaky, ringlike, strip-shaped, block-shaped, honeycomb or powdery. The catalyst can be used for completely catalytically oxidizing CO(carbon monoxide), alkane, halogenated hydrocarbon, aromatic hydrocarbon and heterocyclic compounds at 200-350 DEG C. The catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas has the advantages of low initiation temperature, high conversion efficiency, low cost, wide application scope, and meets the industrial waste gas treatment requirements of various enterprises.

The invention relates to an electric double-track wheel type flaw detection car. The electric double-track wheel type flaw detection car comprises a car frame, a detection device, a power supply device, a left scanning device, a right scanning device, a left driving wheel, a left driven wheel, a right driving wheel, a right driven wheel, a left coupling device and a right coupling device. The car frame comprises a car body, a left wing, a right wing, a motor assembly, a left extension coupler, a right extension coupler, a left guiding shaft, a left guiding sleeve, a right guiding shaft, a right guiding sleeve, a left guiding device and a right guiding device. The detection device, the power supply device, the motor assembly, the left guiding sleeve and the right guiding sleeve are arranged on the car body; the left driving wheel, the left scanning device, the left coupling device, the left driven wheel, the left guiding device, the right driving wheel, the right scanning device, the right coupling device, the right driven wheel and the right guiding device are arranged on the left wing and the right wing. The flaw detection car is convenient to arrange, disassemble and convey, and can be manually put away and extended, the detection accuracy is improved and the cost is low.

A method and system for implementing an embedded multilingual WEB page, an embedded device WEB user interface design, the method includes the following steps: S1 defines the type of language; S2: translate the language to generate an excel list; S3: use the translation The tool converts the excel list into a multilingual resource file; S4: reads the multilingual resource file into the memory hash table; S5: reads the language resource value in the hash table, and displays it on the WEB page. The system includes a multilingual file translation module, a multilingual resource conversion module, a multilingual resource reading module, and a page element display module. The invention can save bandwidth, is suitable for javascript processing in browsers, conveniently expands language versions, satisfies continuous growth and changes in overseas markets of embedded devices, and can reduce test maintenance and management costs of different language versions.

The invention provides a method and a device for the early warning of vehicle rear-end accidents on an expressway and relates to a GPS positioning technology, a serial communication technology, a voice multimedia technology, a picture and image processing technology and a wireless data transmission technology. The device comprises a plurality of wireless data communication stations. Each wireless data communication station is formed by a central processing unit, a peripheral circuit, a wireless data module 1 and a wireless data module 2. The wireless data communication stations communicate with a vehicle-mounted terminal through the wireless data module 1 and the wireless data module 2. By adopting the device of the invention, the cost is saved, the insecurity caused by the traditional used high-voltage circuit is avoided, the operation of the device is simple and practical, the extensibility is high, users are only required to operate cell phones, to push down the buttons of the wireless modules and the like, the response speed of the device is rapid and the device is suitable for handling emergency incidents on the expressway.

The invention relates to the technical field of sludge resource technology, in particular to a technology which uses aerobic biological-physical-chemical jointed rapid fermentation technology to treat the urban living sludge resources; municipal sludge, mushroom dregs and green garbage are mixed based on a proper proportion; then an appropriate amount of quicklime is added to the mixture for fermentation through the aerobic biological-physical-chemical jointed technology; the fermentated product is screened and sorted to form the refined organic fertilizer. The technology can make fast treatment to three waste resources including the municipal sludge, the urban green garbage and the mushroom dregs; the technology can also adjust the material proportion of the mixture based on the nutritional characteristics of various gardens and fruit trees, as well as the resource conditions in different areas, so that the obtained organic fertilizer can achieve best effect. The organic fertilizer has full nutrients, good fertilizer efficiency, long fertilizer effect period and high utilization rate, which has the functions of improving the soil activity, resisting drought, saving water, preventing disease and improving crop yield and quality so as to eventually reduce the municipal sewage sludge and realize harmless treatment to the municipal sewage sludge resource.

The invention discloses a local sampling-based multi-geometrical characteristic point cloud data splitting method. The method includes the following steps: a three-dimensional rule grid is utilized to divide all acquired point cloud data into a plurality of first grid units; the process of extracting each geometrical characteristic includes the following steps: a sampling point is randomly chosen from the first current data set, the current first grid unit with the sampling point is determined, the sampling point and the other points in the current first grid unit are utilized to construct Alpha candidate geometrical models, an optimal model is determined from the Alpha candidate geometrical models, a consistent set of the optimal model is calculated in the first current data set, and according to multiple geometrical characteristics, all the point cloud data are split into a plurality of subsets. From local sampling, the method constructs candidate geometrical models from a first grid unit, and determines an optimal model from the candidate geometrical models, so that a geometrical characteristic is extracted, thus the problem of fitting models not existing in reality is prevented; and the method is more efficient.

The invention relates to an A2N-SBR (anaerobic-anoxic / nitrification-sequencing batch reactor) process with a shortcut nitrification-denitrification denitrifying and dephosphorizing function. Compared with an A2N-SBR process with a complete nitrification-denitrification denitrifying and dephosphorizing function, the A2N-SBR process provided by the invention saves aeration amount and organic carbonsource amount, greatly reduces residual sludge amount and saves operation cost. The A2N-SBR process provided by the invention comprises a main reaction tank and auxiliary equipment, wherein the main reaction tank comprises an A2-SBR and an N-SBR; and the auxiliary equipment comprises stirring equipment, aeration equipment, a dissolved oxygen detection device, a reflux pump, pH adjusting equipment, a pH detection device, heating equipment and a temperature detection device. The A2N-SBR process provided by the invention has the advantages that: two independent SBRs are adopted; nitrite bacteriaand denitrifying phosphate-accumulating bacteria grow separately in the two reactors through controlling proper conditions, so that denitrification is carried out when NH4<+>-N oxidation goes to NO2<-> stage, thus operation energy consumption is greatly saved, bacteria are not mutually influenced in the operation process, and the bacterial activity is higher in the whole bacterial growth process;and the process is simple, the arrangement is compact and the automation degree is high.

The invention discloses a sewage denitrogenation treatment method of an artificial quick percolation system and an application thereof. Aiming to overcome the disadvantages of the prior art that the total nitrogen index of domestic sewage treated by an artificial quick percolation system can not reach the I-A criteria of the Discharge Standard of Pollutants for Municipal Sewage Treatment Plant (GB18918-2002), the invention provides the sewage denitrogenation treatment method. The method channels sewage undergoing predeposition treatment into an artificial quick percolation pool filled with river sand, marble sand and crushed stone by means of two water distribution pipes; nozzles of the water distribution pipes are respectively positioned at the top of the upper surface of a percolation layer and inside a percolation medium; and sewage undergoing purification treatment flows out through an overflow water outlet. Compared with the prior art, the sewage denitrogenation treatment method has high total nitrogen removing efficiency, and treated sewage meets the I-A criteria in the Discharge Standard of GB18918-2002; moreover, the method has flexible process, low investment, less energy consumption, low operating cost and convenient maintenance and management, and is particularly suitable for the treatment of rural domestic sewage.

The invention relates to a network video monitoring system based on FPGA chaotic encryption, comprising a server terminal, a client terminal and a system configuration terminal. The server terminal comprises a plurality of cameras, a video server, an encryption module and a signal sending module; the client terminal comprises a signal receiving module, a decryption module and a client terminal player; video frequency collected by the plurality of cameras is coded by the server, then input into the encryption module via the Ethernet and sent to the client terminal via the signal sending module after encrypted; the signal receiving module of the client terminal receives the encrypted video data and then sends the data to the decryption module for processing and finally the client terminal player plays the video data; the encryption module and the decryption module are respectively an FPGA encryption board and a decryption board; the encryption process and the decryption process of the encryption module to video flow are as follows: the encryption module adopts a CPRS array which is cut and operates with a plain text data module 2, and then sent; and the receiving terminal of the decryption module obtains the same CPRS array, and then operates with a cryptograph module to realize decryption.

The invention relates to waste processing, in particular to a method and a device for purifying waste liquid from pig cultivation, which solves the problem that the waste liquid of pig cultivation pollutes the environment. After solid and liquid waste generated by pig cultivation is separated, absorption, filtration and automatic purification technology is used for enabling the separated waste liquid from pig cultivation to enter into a first absorption pool for first absorption and filtration, then filtrated liquid enters an automatic purification depositing pool for purification depositing processing and then a second absorption pool for second absorption and filtration processing, and lastly, the processed waste water reaches the standard and is discharged. The device for purifying waste liquid from pig cultivation comprises a first absorption and filtration pool, an automatic purification depositing pool and a second absorption and filtration pool which are sequentially communicated, wherein filtration material is arranged in the absorption and filtration pools, and the filtration material is only one or a plurality of layers of furnace slag, crop stems, zeolite and gravel. The invention has simple technology, low cost and easy application, and is suitable for the purification and the standard discharge of the waste liquid from family type pig farms or small pig farms.

The invention discloses a multi-functional elevating platform with a simple structure, movement convenience and easy operation. The multi-functional elevating platform mainly comprises a platform (1), scissor forks (3), screws (7) and an elevation control device. The multi-functional elevating platform is implemented in a manner that the double screws are driven to rotate synchronously through the manual or mechanical transmission of chain gears, so that screw nuts are driven to make reciprocating movement, the scissor forks connected with the nuts are opened or closed, and then the platform goes up and down. The elevating platform is simple in structure, low in manufacturing cost, wide in use, stable in elevating and easy to position, is safe and reliable, can be applied to aloft working occasions such as power grid erection in decoration, can be elevated by various powers and further can be fixed on a motor-driven vehicle to move in various situations so as to be used conveniently and safely; and as the self-weight of the multi-functional elevating platform is reduced, the multi-functional elevating platform is labor-saving when being transported.

The invention discloses a frequency-convertible echo cancellation method based on near-end audio signal calibration and correction and relates to the technical field of audio and video processing. The frequency-convertible echo cancellation method based on the near-end audio signal calibration and correction is a near-end audio signal calibration and correction method and includes the first step of carrying out one-time calibration on the frequency conversion of a microphone of equipment and the frequency conversion of a loudspeaker of the equipment to generate a set of frequency correction parameters, and the second step of firstly carrying out one-time correction on collected audio signals through the utilization of the frequency correction parameters calibrated before, then allowing estimation echo audio signals generated from a self-adaptive filter module to be subtracted from the corrected audio signals and finally achieving the echo cancellation function. The frequency-convertible echo cancellation method based on the near-end audio signal calibration and correction is capable of well canceling echoes after the frequency conversion, simplifying the calculated amount of a self-adaptive filter, enabling the calculated amount of the self-adaptive filter to have better convergence, being suitable for processing the long echoes and reducing noises and constraint.

The invention discloses a method for determining data sample class and a system thereof. The method of the invention comprises the following steps: performing a plurality of first Map tasks in parallel, wherein each Map task obtains parts of data samples integrated by data samples to be classified; calculating the similarity of each data sample in parts of data samples and a training sample centralized by the data sample; taking the class corresponding to the first K descending sort similarities by aiming at each data sample; performing an Reduce task which respectively collects the classes corresponding to the K similarities of each data; and determining the majority of class in each data sample to the class of the data sample. The invention can improve the efficiency of classified treatment of a data sample.

The invention provides an information processing device. The information processing device comprises a storage unit and a data processing unit. The storage unit is used for receiving and storing dataand commands. The data processing unit is connected with the storage unit, and is used for receiving the data and the commands both sent by the storage unit, extracting and calculating key features included in the data and generating multi-dimensional vectors according to calculation results. The invention further provides an information processing method. The information processing device and theinformation processing method have the advantages that human faces are recognized accurately and rapidly; offline neural network operation is supported, and human face recognition and corresponding control works can be realized when user terminals / front ends are offline without assisted calculation of cloud servers; high portability is achieved, the information processing device and the information processing method can be applied to various application scenes and equipment, and design cost is saved greatly.

A wallboard seam processing technic belongs to the technical field of inner wallboard processing of building. The processing method is realized by that: a flute arranged at one side of a wallboard is internally affixed with rubber sponge with a certain thickness, the two sides of the rubber sponge are smeared with polymer sand pulp, and then the rubber sponge is abutting-jointed with a tenon of the wallboard or the side or the pillar of the wallboard as well as is tightly squeezed by force, so as to lead the rubber sponge to have a certain decrement; after that, the two sides of the seam are filled with elastic sealing compounds with a certain thickness, finally, the two sides of the seam are affixed with an anticracking gridding adhesive tape. The material in the seam of wall in the wallboard seam processing technic adopts elastic material, so as to solve the problem that generally appears and is hard to be settled of straight joint of slab joint caused by structural distortion or walling material drying shrinkage; furthermore, the rubber sponge adopted in the middle of the slab joint is made of fire resistant heat insulating material and can prevent a heat channel from generating among the slab joints, thereby having certain fireproofing performance. The invention is applicable to the slab joint processing of most of the inner wallboards such as a GRC board, a plasterboard, a hollow slat, etc. at the present time.

The invention relates to a preparation method of cationic polyacrylamide. The cationic polyacrylamide is prepared by the following steps of: adding a certain amount of solubilizing agent and complexing agent into acrylamide (AM) and aqueous solution of two cationic monomers; regulating the pH value of a reaction system; then adding a certain amount of initiator; and performing the polymerization reaction under the ultraviolet light with a certain wavelength. The preparation method has the advantages that the polymerization reaction time is short; few types of auxiliaries are added; and the prepared product has high purity and is non-toxic and harmless. The cationic polyacrylamide obtained by the preparation method has multifunctionality, has the molecular weight of 1 million to 12 million, has ultralow concentration of a residual acrylamide monomer, is suitable for treatment of drinking water and sewage treatment and dehydration treatment of sludge and has excellent application prospect.

The present invention provides the biosynthesis of Schwertmannite as high efficiency adsorbent and its usage in adsorbing to eliminate Cr(VI) and As from waste water and underground water. Schwertmannite is prepared with ferrous sulfate as reactant, deionized water as reaction medium and Thiobacillus ferrooxidans LX5 as catalytic oxidant, and through stirring for 1-3 days, filtering to collect precipitate, washing with sulfuric acid acidified deionized water, washing with deionized water and stoving. Schwertmannite is added into water to be treated in the amount of 0.5 wt% or 0.02 wt%, dilute nitric acid is added into Cr(VI) containing system to regulate the pH value to 5.0-7.0 or sodium hydroxide is added into As containing system to regulate the pH value to 6.0-10.0, and the system is stirred for 3 hr and filtered to eliminate Cr(VI) and As. Schwertmannite has maximum adsorption amount on Cr(VI) and As of 55 mg / g and 65 mg / g separately.

The invention provides a method for preparing honeycomb-like activated carbon by using coal and coal tar, which takes coal dust and the coal tar as raw materials to prepare the honeycomb-like activated carbon by grinding the coal dust, charge mixture, vacuum pugging, seal aging, vacuum extruding and moilding, drying, carbonization and activation. The method for preparing the honeycomb-like activated carbon only takes the coal tar as cementing agent, so as to overcome the defect that multiple cementing agents are needed to be applied in the technique, thus having the characteristics of simple raw materials, low production cost and easy industrialization. The produced honeycomb-like activated carbon has the characteristics of large geometric area and specific surface area, high mechanical strength and the like, and can be applied for the treatment of waste gas and waste water and catalyst carrier.

The invention relates to a staged membrane bioreactor device, for treating sewage or micro-polluted source water, with a water container, pertaining to the environmental protection technology field. The device consists of a half-reaction zone, an anaerobic reaction zone, an aeration reaction zone and a pure water zone. The half-reaction is communicated with the bottom of the aeration zone, the bottom of the half-reaction is provided with an empty valve, one side of the half-reaction zone has a water inlet pump, the inside of the half-reaction has an internal ring filled with stuff, and the top of the half-reaction is provided with a stirrer, and the effluent of the half-reaction automatically flows into the anaerobic reaction zone. The top of the anaerobic reaction zone is provided with a stirrer, the bottom thereof is provided with a sludge empty valve, and a sludge empty device is shaped like a horn mouth and positioned in the anaerobic reaction zone, and the top of the anaerobic reaction zone is provided with a drug feeding mouth. The bottom of the aeration reaction zone has an internal return pump, the lower part of the aeration reaction zone is provided with an aeration pipe with an air inlet positioned at one side of the aeration reaction zone, and a fan is connected to the aeration pipe through the air inlet; the top of the aeration reaction zone is provided with an overflow pipe, the bottom of the aeration reaction zone is provided with an empty valve, while the middle is provided with a membrane component. The pure water zone is divided into two units, and the inside of each unit is provided with an effluent valve. The invention has the advantages of good effluent quality, multi purposes, small land occupancy, flexible and convenient using method, and is applied to the treatment of domestic sewage and micro-polluted source water, and can widen and facilitate the application of membrane bioreactor water treatment and water resource reutilization technique.

The invention relates to a soft plant floating bed which is applied in revetment and water purification, which is a composite plant cultivation apparatus on water that adopts a disk-shaped single floating bed as one unit, wherein, a plurality of hygrophytes or amphiphytes are cultivated in the floating bed to form a floating bed that can float in the water; meanwhile, the aim of in-situ remediation and the control of the eutrophic water can be reached by using the plant to provide the biological cleaning function on the eutrophic water in lakes, rivers and channels. The main characteristics or effects of the floating bed are that: 1. the invention is used for acting the biological purification on eutrophic water in different waters; 2. one end of the floating bed is fixedly connected to the bank, which provides protection to the hydro-fluctuation belt and bank of reservoirs, lakes, rivers and channels. When the water level rises, the plant in the floating bed which grows on the water can absorbs the water nutrition enrichment to decrease the eutrophication degree; when the water level decreases, the floating bed covers the hydro-fluctuation belt to provide wave absorption and a protection layer for the bank.

The invention discloses an acquisition system and a method of the text field based on concept symbols. The system comprises a concept symbol set for expressing word concepts and field categories, a word knowledge base for storing word and concept symbols, a word segmentation processor, a statement semantic analyzer and a field arbiter. The method comprises the following steps: (1) segmenting an input text into paragraphs, statements and words; (2) carrying out semantic analysis on the statements for obtaining concept categories and semantic blocks of the statements; (3) obtaining activating words in the statements according to semantic concept symbols in the field concept symbol set and the word knowledge base; (4) carrying out comprehensive scoring on field concept symbols of the activating words and obtaining the field concept symbol with the highest score as the field of the statements; (5) merging the statements in the paragraphs according to the field concept symbols for obtaininga statement group and the field thereof; and (6) obtaining the field of the text according to a title of the text and the frequency of occurrence and the position of the statement group in the statement group.