999results about How to "Simple operation and maintenance" patented technology

There is provided a manipulator simplified in maintenance and operation thereof, the manipulator having the freedom of two-degree-of-freedom of rotation and gripping, and being capable of ensuring force feedback or force sensation with excellent operationability. A link mechanism 3 is provided between an operating part 1 and a working part 2. The link mechanism 3 comprises four driving rods 3a to 3d and first and second coupling members of the same structure, 41, 42 provided at opposite ends of the driving rods. First and second working members 2a, 2b move correspondingly to operations of first and second operating members 1a, 1b with the aid of the link mechanism 3. For example, provided that the first and second operating members 1a, 1b might be opened and closed, the first and second working members 2a, 2b might be opened and closed (gripping). And also, provided that the first and second operating members 1a, 1b are changed in their yaw angles, the working members 2a, 2b are also correspondingly changed in their yaw angle. Similarly, once the first and second operating members 1a, 1b are changed in their pitch angles, the working members 2a, 2b might be also correspondingly changed in their pitch angles.

The invention discloses a non-intrusive mode electrical load identification system and method. The load identification system comprises electrical load, a load identification terminal and a load monitoring main station; and the load identification terminal performs information interaction with the load monitoring main station through modes of optical fibers, an Ethernet and a wireless public network. The load identification terminal, by analyzing waveform characteristics of current, voltage, active power and the like of typical electrical equipment, defines different characteristic parameters based on a steady state process and a transient state process to establish a standard transient library, and then establishes an electrical load identification model by combination of the steady state and the transient state characteristic similarity of the electrical equipment. The identification system module is high in integration level, the terminal is smaller in size, the construction cost of the system is lower, the running and maintaining of the system are simple without affecting production and life of users; and the non-intrusive mode electrical load identification method can realize accurate identification of load types and running states of multiple paths of electrical equipment at the same time.

The invention discloses an access method for block chain data and a block chain management system. The method is applied to the block chain management system. The block chain management system comprises a plurality of block chain nodes, wherein each block chain node at least comprises a block chain application module, a block chain access module and / or a block chain storage module. The method comprises the following steps that: a block chain application module sends a data access request to a block chain access module; the block chain access module sends the access request to a block chain storage module according to configuration information; and the block chain storage module processes the access request, and feeds back data processed according to the request to the block chain application module through the block chain access module. Through adoption of the access method, existing block chain data are isolated into separate modules according to functions; the modules can be arranged in different nodes; and cross-network access is supported. Moreover, monitoring can be performed specific to each module; upgrade, repair and the like specific to a single module are supported; and operation and maintenance can be carried out more easily.

The invention relates to a method for monitoring and analyzing website user behaviors. The method includes the steps of analysis object determination, page point insertion, log collection, HDFS storage, distributed summary calculation and result display. The method can be applied to websites with large page views (a hundred million page views per day), data such as website page views and click views can be accurately displayed in real time, and millisecond-level search of detail data can be achieved as well. The method is designed completely based on open source software development, a common pcserver and a common sata hard disk are adopted, redundant design is adopted in system architecture, and data will not be lost if any data node or the hard disk is damaged. All links can be automatically carried out, graphic monitoring can be achieved, and the method is easy to implement.

The invention provides a tiled display control system based on a cloud computing technology, an image display method adopting the system and an application of the system. The system comprises a plurality of displays, a plurality of distributed cloud registration controllers, a plurality of exchangers and system software, wherein a jointing wall is formed by the plurality of displays; an LAN (Local Area Network) is formed by cascading the plurality of exchangers, and a framework core of an IP (Internet Protocol) network is formed by a transmission channel for providing data and control commands; the plurality of distributed cloud registration controllers are accessed into the exchangers of the corresponding levels, and are connected with the corresponding displays through video connecting wires, and the cloud registration controller adopts a PCI-E (PCI Express) base-plate and is provided with an Inter processor. A plurality of data (IE) windows can be displayed on an assembled display simultaneously by adopting the performance of a flexibly configured server and an output channel of the system, and can be interacted in real time; furthermore, the tiled display control system has the functions of video decoding, server memory and the like after the system is applied to a video conference system; compared with the traditional scheme, the system has the advantages of high performance, high reliability, high development, low cost, information processing, strong analysis and management capacities, high resolution ratio, high performance cost ratio, real-time display, green environmental protection and the like.

The invention discloses a full-automatic inductance winding machine and a winding method of the full-automatic inductance winding machine, and belongs to the field of electronic component machining equipment. The full-automatic inductance winding machine comprises a support, a mechanical feeding mechanism, a mechanical discharging mechanism, a transfer mechanism, a winding mechanism and an operation panel and further comprises a secondary wire pressing mechanism. Compared with a traditional manual winding technology, the full-automatic winding machine has the advantages that efficiency is higher and quality is greatly improved. Compared with an existing automatic winding machine, the full-automatic inductance winding machine has the advantages that one cycle of the full-automatic inductance winding machine lasts for 7 seconds to 8 seconds, five products can be machined in one cycle, and therefore efficiency is not lower than that of a Rite winding machine; meanwhile the structure is simple, operation and maintenance are easy, manufacturing cost is 1 / 3 that of the Rite winding machine, and therefore more cost can be reduced; cut wire residues are shorter, 1 / 10 of copper wires are reduced compared with products with the same yield, it is estimated that ten thousand yuan of the copper wires can be reduced every year, the wire residues are firstly cut and then pressed, and therefore the treatment effect of the wire residues is better.

The manipulator has two-degree-of-freedom of rotation and gripping, and is capable of ensuring force feedback or force sensation with excellent operationability. A link mechanism 3 is provided between an operation part 1 and a working part 2. The link mechanism 3 has four driving rods 3a to 3d and first and second coupling members of the sane structure, 41, 42 provided at opposite ends of the driving rods. First and second working members 2a, 2b move correspondingly to the operation of first and second operating members 1a, 1b with the aid of the link mechanism 3. The first and second working member can open and close, change the yaw angles and the pitch angles in response to the same action of the first and second operating member through the link mechanism.

The embodiment of the invention discloses an asynchronous batch-processing dispatching method, which comprises the following steps of receiving a batch-processing business request, and statistically calculating the transaction-processing data volume of batch-processing business; judging whether the transaction-processing data volume is greater than a data threshold value or not; if so, then analyzing the business type of asynchronous batch-processing business; when the asynchronous batch-processing business is analyzed as a real-time dispatching task according to the business type, carrying out real-time dispatching processing on the asynchronous batch-processing business; when the asynchronous batch-processing business is analyzed as an asynchronous dispatching task according to the business type, carrying out asynchronous dispatching processing on the asynchronous batch-processing business. By adopting the asynchronous batch-processing dispatching method, uniform batch-processing business developing frameworks are provided and are easy for developing extension, operation and maintenance, monitoring and exception processing, so that the batch-processing dispatching flexibility is improved; in addition, distribution processing is carried out according to different business types, and different business types can correspond to different task-processing ponds, so that the utilization rate of resources is effectively improved.

The invention provides a double-platform exchanging system for a photoetching machine silicon chip platform with a conveyor belt and belongs to the technical field of the manufacturing equipment of a semiconductor. The invention comprises a silicon chip platform operated on a pretreatment station and a silicon chip platform operated on an exposure station; the pretreatment station and the exposure station are respectively provided with a H-typed driving unit and the H-typed driving unit consists of X-directional straight line motors on the two sides and a Y-directional straight line motor, both of which are used for driving the silicon chip platform to move along X direction and Y direction on the pretreatment station and the exposure station; the two sides of a base station are respectively provided with a conveyor belt in the system and a butt slide block is fixed on and connected with the lateral side of the conveyor belt; with the conveyor belt and the butt slide block, the transition of the silicon chip platform 1 from the pretreatment station to the exposure station can be realized. As the invention adopts the conveyor belt structure, the invention effectively avoids the problem of accurate abut joint of the guide rail of the patent ZL03156436.4 double-platform exchanging system and has the characteristics of simple operation and small size of outline, etc.

A roof-top parking system and method for automatically parking and retrieving a vehicle on a roof. The system includes a communication system adapted to receive a parking request or a retrieval request, and a vehicle positioning device which positions a vehicle a queuing space on the ground adjacent a building and a parking space assigned to the vehicle on the roof of the building.

The invention discloses a process method for treating coking wastewater and petrochemical wastewater with advanced biochemical and physic-chemical treatment. The method comprises a step of pretreatment, a step of conventional biological treatment, a step of advanced biochemical treatment and a step of materialized treatment, wherein, the step of pretreatment comprises adjustment, oil removal and floatation; the step of conventional biological treatment consists of an anaerobic-anoxybiotic-aerobic activated sludge process, an anoxybiotic-aerobic bio-film activated sludge process or an anoxybiotic-aerobic bio-film process which are performed in sequence; the step of advanced biochemical treatment adopts a filtering stage and a back purging stage which are performed alternately and repeatedly in a biological aerated filter, and the switching of the two stages are executed by an automatic control system; the step of materialized treatment adjusts pH of water treated in the biological aerated filter to be subacidity, adds Fe<2+> salt and H2O2 into the water and stirs to react in an advanced chemical oxidation pond, and then performs an operation mode of neutralization and precipitation. Therefore, final effluent organic substances can be reduced to a lower level, which can completely fulfill the first-grade national effluent standard, and can achieve recycle-water quality through increasing the dosage for the advanced chemical oxidation pond. The wastewater treatment process has simple operation and maintenance, and both BAF and ACO adopt automatic control.

The invention provides a landfill leachate nanofiltration concentrate treatment method. The method comprises the following steps: pumping a landfill leachate nanofiltration concentrate into a reaction tank, adding a coagulant, an antifoaming agent and a flocculating agent into the reaction tank, and reacting; allowing the obtained concentrate to go through a pipeline and flow into a precipitation pool, and carrying out solid-liquid separation to obtain precipitated sludge and a precipitated clear liquid; pumping the precipitated sludge into a dehydrator for separation, sending the generated dehydrated clear liquid and the precipitated clear liquid to a microelectrolysis reactor, and oxidizing; adding an alkali to oxidized water to adjust the pH value to 7-9, sending the obtained water to an ozone reaction tank for further oxidation, and introducing ozone generated by an ozone generator into an ozone reaction tank for aeration; and returning the treated nanofiltration concentrate to a biochemical system. The method ingeniously combining a physical and chemical reaction with a biochemical technology has the advantages of stable running, easy operation and maintenance, low running cost and high treatment efficiency, and partially solves the carbon source insufficiency problem of landfill leachate.

The invention relates to a riverbank ecological buffering band and a construction method for the same. The construction method comprises the following steps of (1) selecting a construction area, (2) adjusting gradient of the construction area, (3) determining a group construction scheme, and (4) planting plants according to the group construction scheme. The invention further provides a riverbank ecological buffering band constructed according to the method. Plants are optimized without a change of an original soil layer structure of the riverbank buffering band, and sewage can be stopped and controlled before entering the river way; resistance of the sewage is increased when the sewage flows through the buffering band, working time of the sewage between the buffering band and plant roots and the soil micro-bial community can be increased; pollutants can be removed; water and soil loss can be reduced; load of pollutants flowing into the river can be reduced; and land resources can be conserved and environment can be beautified.

The invention discloses a double-layer artificial wetland system for strengthening sewage denitrification and dephosphorization and an operation method thereof. The system comprises an upper layer of wetland, a lower layer of wetland, a water inlet and distribution system and an effluent collection system, wherein the upper layer of the wetland is filled with mineral filler, and the lower layer of the wetland is filled with biologic filler which is favorable for microorganisms to adhere to grow; the water inlet and distribution system is divided into to two branches, wherein one branch is distributed above the upper layer of the wetland, and the other branch is distributed on the interface of the upper layer of the wetland and the lower layer of the wetland; and the effluent collection system is distributed on the bottom of the lower layer of the wetland. The method comprises: waterfall aeration is carried out on sewage by one branch of the distribution system, then the sewage falls into the upper layer of the wetland to remove organic matters, ammonia nitrogen, phosphorus and the like to vertically seep into the lower layer of the wetland; in order to supplement a carbon source, a small strand of sewage is introduced into the lower layer of the wetland by the other branch of the distribution system to be mixed with the sewage seeped from the upper layer of the wetland for denitrification; and water is discharged from the effluent collection device after being processed. The invention occupies small area, has small possibility of being blocked and has favorable denitrification and dephosphorization effects and low investment operation cost.

The invention provides a garbage compression leachate comprehensive waste water treatment device and technological method. The device comprises a grille, a waste water storage tank, an ultrasonic Electro-Fenton reactor, an intermediate water storage tank, an ultrasonic vibration film reactor and a vortex vibration film filtration system, wherein the grille, the waste water storage tank, the ultrasonic Electro-Fenton reactor, the intermediate water storage tank, the ultrasonic vibration film reactor and the vortex vibration film filtration system are sequentially connected. The device further comprises a sludge dewatering drying pool which is connected with a vortex energy-saving heat pump flash evaporator of the vortex vibration film filtration system and provided with a circuit connected with the ultrasonic vibration film reactor. Waste water sequentially flows through the grille, the waste water storage tank, the ultrasonic Electro-Fenton reactor, the intermediate water storage tank, the ultrasonic vibration film reactor and the vortex vibration film filtration system for redox reactions and filtration. The device is high in operability, high in regeneration cycle use rate and low in operation cost.

The invention discloses electric flocculation method and device for recovering and processing desulfurized wastewater. The electric flocculation method for recovering and processing desulfurized wastewater comprises the following steps of: collecting desulfurized wastewater to enter an electric flocculation reactor, then, carrying out solid-liquid separation, recovering the separated clear effluent water in a clinker-flushing system of an electric power plant or directly discharging the separated clear effluent water, conveying the sludge to dewater in a mud-processing system, and returning the effluent water of the mud-processing system to a water intake system. Compared with the prior art, the electric flocculation technology is adopted to substitute a complicated chemical method for recovering and processing the desulfurized wastewater, can effectively remove pollutants in the wastewater, reaches a heavy metal processing rate up to 95-99 percent, a chlorine-processing rate over 80 percent and removal rates of ammonian, and the like over 90 percent, greatly shortens the processing time, improves the processing efficiency and saves the investment cost. Moreover, the electric flocculation processing device has small size, extremely small floor occupation, good environmental-protection performance and low cost without additional flocculating agents.

The invention discloses a method and device for realizing inter-board interconnection. By dividing and configuring different VLAN subnets on the uplink port of the service single board, the uplink ports of the service single board are connected to switching units of different main control boards. , and the ports on the switching units of the different main control boards are configured to support all VLAN subnets, so that after VLAN division, the problem of Ethernet loops after cascading multiple switching planes can be solved, the hardware requirements for the equipment It is very low; and when the port fails to switch, it reduces the impact on the service plane and simplifies the operation and maintenance process of the equipment.

The invention discloses circulating fluidized bed advanced treatment equipment for industrial wastewater. The equipment comprises a tank body for the Fenton oxidation reaction of wastewater, wherein the tank body is divided into a circulating water distribution zone, a FeOOH crystallization zone and a gas-water separation zone from bottom to top in turn; the circulating water distribution zone is provided with a water distributor and a circulating water inlet; the circulating water inlet is connected with the output ends of a FeSO4 dosing pump, a H2O2 dosing pump and a circulating pump simultaneously; the FeOOH crystallization zone is provided with a crystal bed layer, a solid discharge pipe and a circulating water outlet; the circulating water outlet is connected with the input end of the circulating pump; the gas-water separation zone is provided with a gas-water separation barrel, a wastewater input pipe extending to the gas-water separation barrel, a gas discharge pipe, an annular effluent weir and a purified water discharge pipe; and the wastewater input pipe is connected with the output end of an influent pump. The equipment has the characteristics of low operating cost, low sludge yield and good treatment effect, is flexibly and conveniently operated, and is particularly suitable for the industrial wastewater containing non-degradable organic matters.

The invention discloses a deep sea net box cultivating apparatus for offshore wind field, which comprises an offshore wind turbine foundation, wherein an operation platform is mounted on the top portion of the offshore wind turbine foundation; a rotary sleeve ring fixing system is mounted on a lower end of the offshore wind turbine foundation; the rotary sleeve ring fixing system is connected to a rotary arm mechanism; the rotary arm mechanism is connected to an offshore net box module through a cable connecting rod component; the rotary sleeve ring fixing system comprises a reinforced cylinder sleeve; an upper rotary sleeve ring and a lower rotary sleeve ring are respectively mounted on an upper end and a lower end of the reinforced cylinder sleeve; and the upper rotary sleeve ring and the lower rotary sleeve ring are respectively connected to the rotary arm mechanism through an upper connecting buckle and a lower connecting buckle. According to the utility model, by adopting the apparatus provided herein, the offshore wind field can be applied with various purposes; organic combination between the offshore wind power generation and the offshore net box cultivation is realized; the space of the offshore wind field and the offshore wind power are fully utilized, thus improving the overall economy benefits.

The invention belongs to the technical field of electric-power equipment detection, and in particular, relates to a detection device of dissolved gases in transformer oil based on infrared spectrum absorption. The device includes a light source system unit, a sensing arrangement unit and a detection acquisition and analysis unit; the light source system unit is composed of a high-power supercontinuum broadband light source, a light source controller and a photoswitch and is used for realizing output multiplexing control of the light source; the sensing arrangement unit is formed by arranging one sensing path of fiber Bragg grating hydrogen sensor series-connection wavelength division multiplexing and the other one sensing path of hollow photonic crystal optical fiber internal spectrum absorption sensing in a cavity body of an oil-immersed power transformer; the detection acquisition and analysis unit is composed of a wavelength demodulation device, a light intensity detector and a data acquisition and analysis device, the wavelength offset and the spectral absorption intensity of fiber Bragg grating hydrogen sensors are detected, and the data acquisition and analysis device records data and types and contents of corresponding fault gases are obtained by calculation; and on the basis, insulation conditions of the transformer oil are evaluated, positioned, analyzed and forecasted.

The invention provides a construction creeping formwork hydraulic synchronous control system of a high-rise structure, comprising an oil tank, an oil pump, a transmission pipeline system, two oil cylinder jacking mechanisms and a synchronous control device. The transmission pipeline system comprises an oil-absorbing branch, an oil-returning branch and an electromagnetic directional valve, and either oil cylinder jacking mechanism comprises jacks, a hydraulic one-way valve and two-position three-way control valves. The construction creeping formwork hydraulic synchronous control system is characterized in that either two-position three-way control valve is provided with an opening connected with the synchronous control device, an opening connected with a corresponding jack and an opening connected with the electromagnetic directional valve; the opening connected with the synchronous control device and the opening connected with the jack are communicated when the power is on; and the opening connected with the synchronous control device and the opening connected with the electromagnetic directional valve are communicated when the power is off. The construction creeping formwork hydraulic synchronous control system can favorably solve the problems of different motion speeds and asynchrony motion in various jacking machine positions, can automatically control the lifting speed and ensures stable and synchronous lifting.

The invention discloses a method and a system for denitrifying low-carbon high-nitrogen sewage by utilizing a plant carbon source-enhanced artificial wetland. The method comprises the following steps: hydrolyzing by taking waste crops or wetland plant straws as carbon sources, and charging hydrolysate into an artificial wetland so as to improve the denitrification efficiency of the low-carbon high-nitrogen sewage. The invention simultaneously provides a treatment system, which is simple in structure, and scientific and reasonable in carbon source charging mode, and the denitrification effect of the low-carbon high-nitrogen sewage can be well realized by enhancing the artificial wetland through utilizing the plant carbon source. According to the method, the adopted plant carbon sources are cheap and easily available, the carbon release capability is strong, the bio-denitrification effect is good, and the hydrolysate is simple and practical to prepare, the carbon source charging mode is strong in continuous running capability, and the method is simple to maintain, less in secondary pollution, low in production cost, and capable of solving the technical difficulty of treating tail water in a sewage treatment plant with low carbon nitrogen ratio through artificial wetland by utilizing a simple method.

The invention discloses a method for updating a terminal device, comprising the following steps of : receiving a prompt report sent by a server by a terminal device; generating an own new IP address by the terminal device according to the prompt report; sending the own device information to the server by the terminal device according to the new IP address; sending the report carrying update version information to the terminal device by the server; after receiving the report carried carrying the update version information by the terminal device, and requiring the server to update version document. In the invention, the new IP address is temporarily configured to the terminal device, and the terminal device is connected with the server through the IP address to update the version document. The invention can not only realize the update of a large amount of access terminal devices realized by other gateways, but also is unnecessary to fixedly configure one IP address to each access terminal device, thereby saving the IP address resource of network operators. In network planning, the IP address is unnecessary to preset for updating, thereby the operation and the maintenance are simpler and more convenient.

A beverage vending machine has a housing, in which first means for brewing and dispensing a coffee beverage prepared using freshly ground coffee are housed. Flexible configuration is made possible in that the first means have a modular construction and comprise at least one base module for brewing the coffee beverage and a separate outflow module for dispensing the coffee beverage, which are in fluid connection with one another by means of one or more fluid interfaces.

The invention provides a method for performing electric line patrolling based on an onboard laser radar. The method comprises the following steps: (1) acquiring real point cloud data through an onboard laser radar system of an unmanned aerial vehicle, providing data basis for monitoring personnel of a power transmission line, and processing the point cloud data; step (2) performing distance measurement and area measurement on any point of the line based on a three-dimensional measurement analysis module, thereby directly and precisely measuring the coordinate and elevation of each point of thepower transmission line, space distance between any two points, and any point elevation; step (3) dividing point cloud data into ground surface point cloud, power transmission body point cloud and ground object point cloud in corridor based on filter processing and point cloud classification on the laser point cloud by a filter and ground object classification module. The method provided by the invention has the advantage of quickly acquiring high-precision laser point cloud and high-resolution digital image, whether the route selection design of a newly established line, or the dangerous point line patrolling checking, line capital management and various specialty analysis potentials on the established line.

The present invention discloses a kind of interception channel system for farmland ecology; the traverse section of the channel appears to be trapezium in shape. Both banks of the channel and the bottom are made of rigid concrete plate in the form of honeycomb structure; at the bottom of the ends of the channel are filtration boxes at interval in the form of coiled arrangement. The filtration boxes have holes all over on the four walls and in the channels are installed graduating valves close to the middle position are equipped with two water-controlled valves. And in the honeycomb holes pants are grown, which have a rather strong absorption of N. P nutritive elements in the farmland drainage. The rational structural design and arrangement of this invention can effectively intercept the N.P nutritive elements in the farmland drainage, thus reducing the rich nutrition by the water absorption. It is of great valve to propagate it in the non-point source pollution control in the farmland.

The invention provides an ultrafine powder full-automatic bag feeding and bag expanding packaging machine which comprises a bag taking mechanism and a bag opening mechanism. During loading, a packaging bag is adsorbed between the bag taking mechanism and the bag opening mechanism through suction cups. The bag taking mechanism comprises a servo motor, multiple first electric cylinders and bag taking suction cups arranged at the ends of the first electric cylinders correspondingly. The first electric cylinders are connected with a shaft of the servo motor. The servo motor drives the first electric cylinders to rotate. The bag taking suction cups are driven by the first electric cylinders to move and suck the un-opened packaging bag. The bag opening mechanism comprises multiple horizontally-arranged second electric cylinders and bag opening suction cups arranged at the ends of the second electric cylinders correspondingly. In the bag opening state, the multiple first electric cylinders and the second electric cylinders are firstly extended, the two sides of the packaging bag are adsorbed by the bag taking suction cups and the bag opening suction cups correspondingly, the first electric cylinders and the second electric cylinders are retracted, and the packaging bag can be opened; and during loading, a discharging pipe moves downwards to be inserted into the opened packaging bag. The ultrafine powder full-automatic bag feeding and bag expanding packaging machine is high in work efficiency and good in reliability, and the problems about grabbing, bag opening and bag expanding feeding of the packaging bag can be solved.

The invention discloses a safety login method of online banking reservation information and belongs to the online banking verification technology field. The method comprises the following steps that: (1) a client firstly sets reserved anti-false information; (2) an online banking system receives the reserved anti-false information set by the client and connects the reserved anti-false information with a client account number and a user name; (3) the client logins an online banking client interface, inputs the account number or the user name to inquire the reserved anti-false information; (4) the online banking system feeds back to an online banking client interface browser; (5) after receiving the online banking system information, the browser displays the reserved anti-false information of the client on the online banking client interface, and the client determines whether to login according to the reserved anti-false information which is fed back. In the invention, before a user logins the online bank and inputs a password, the reserved anti-false information is verified so that user risk can be reduced and user account safety can be guaranteed.

The invention relates to a water quality in-situ pre-treatment method in a water source region. According to the method provided by the invention, a water channel is arranged according to a terrain of the water source region by taking a water fetching opening of a water supply plant as an end point, a photocatalytic purification region, a combined ecological floating bed purification region and an aquatic plant purification region are separately arranged along the water channel, and in-situ pretreatment is carried out on an inflow of the water supply plant in the water channel. The water channel is enclosed by isolating barriers, and a block for intercepting garbage and floating plants is arranged at the water inlet end of the water channel. The three purification regions can be combined in adaptation to local conditions. Compared to the prior art, the method provided by the invention effectively couples four in-situ water quality purification technologies: photocatalysis, ecological floating bed, ecological contact oxidation filler and plant repair. The method is simple in structural design, low in material cost, small in interference by construction and operation on the outside world, simple to maintain and manage, free of additional added chemical agents and safe and free of secondary pollution and can be used for effectively improving the inflow water quality of the water supply plant, so that the main water quality indexes are enhanced by at least one grade.

An embodiment of the invention discloses a method, a device and a system for creating bidirectional multicast distribution trees on the basis of an interior gateway protocol, and relates to the technical field of communication. The technical scheme includes that the method comprises receiving a root address of at least one first node and a multicast group range supported by the first node; generating shortest paths from each first node, which is used as a source node, to other nodes according to the corresponding root address and a shortest path tree algorithm, and creating flooding trees according to the shortest paths; determining flooding trees corresponding to various three-layer multicast groups according to three-layer multicast group information and the multicast group ranges supported by the first nodes when the three-layer multicast group information is received, and generating the bidirectional multicast distribution trees for the flooding trees corresponding to the various three-layer multicast groups according to the three-layer multicast group information. The root addresses of the first nodes are transmitted by the first nodes by means of flooding. The three-layer multicast group information is transmitted by edge nodes by means of flooding. The method, the device and the system have the advantage that the problem of complexity in operation and maintenance due to the fact that a PIM (protocol independent multicast) routing protocol and a unicast routing protocol which is an IGP (interior gateway protocol) need to be simultaneously operated and maintained in multipoint-to-multipoint multicast scenes can be solved.