96 results about "Canal system" patented technology

Systems and methods provide for automated, cyclic delivery and evacuation of a treatment or irrigation solution from a tooth root pulp chamber and pulp canals. A manifold has a base member sized and configured to rest on a crown of an instrumented tooth and a top member sized and configured to couple with the base member to define an inlet chamber and an outlet chamber. The distal end of a needle is passed through an opening between the inlet and outlet chambers and extended distally beyond the base member into a pulp canal. The proximal end of the needle includes an opening in fluid communication with the inlet chamber. A solution is transferred from a fluid supply source to the inlet chamber and through the needle into the pulp chamber and pulp canals. The spent solution is evacuated from the pulp chamber and pulp canals through the outlet chamber.

A northeast region paddy field classification and information extraction system and a method are disclosed. The system comprises four portions of data preparation, paddy field classification, attribute addition and paddy field extraction. According to northeast-region cultivated land utilization realities, the paddy fields are divided into a ''well irrigation paddy field'' and a ''canal irrigation paddy field''. The well irrigation paddy field is the paddy field which is irrigated by underground water pumped through using a motor-pumped well. The 'canal irrigation paddy field is the paddy field which is irrigated by water sources of a canal system irrigation channel, a lake, a river, a reservoir, a pond and the like. Through a land, by using a current state data, a high-resolution remote sensing image, land reclamation data and other data, according to a canal system distribution state, classification and extraction of the 'well irrigation paddy field and the canal irrigation paddy field are realized through visual interpretation. Generally speaking, the paddy field in an irrigated area is the canal irrigation paddy field and the canal irrigation paddy field has relatively complete channel systems of a main canal, a branch canal, a lateral canal, a sublateral canal and the like; a canal system of a well irrigation paddy field area is simple and does not form a system; a surrounding electro-mechanical well is radiated outwardly; the channel is narrow; and a northeast region well irrigation paddy field area generally has a sunning water pool with a large area.

The invention discloses a canal system gate intelligent control method and device. The method specifically includes collecting water level, flow and gate signals, and communicating with a control module in a wireless transmission mode and a wired mode, the water level signals including a before-gate water level signal, a behind-gate water level signal and a midstream water level signal, and the flow signal being an behind-gate flow signal; and an intelligent control module processes a water level, flow and gate opening relation according to the intelligent control method based on a fuzzy neural network and feedforward control, and outputs a gate opening control signal to control the gate opening. The canal system gate intelligent control device provided by the invention is adopted to be combined with the control method to realize control of the canal system gate and water level flow, thereby meeting irrigation area water demand.

The invention provides a real-time dynamic monitoring system of a remote irrigation and drainage system based on internet. The system comprises a data collection unit which comprises a meteorologicalfactors module, a canal system water level-flow module, a field soil moisture content module, an underground water level module and a drainage flow module arranged in the field, wherein the data collection unit is used for acquiring parameters required by the irrigation and drainage system; a storage system comprises a remote receiving terminal, a cloud storage module and a data visual analysis module; a model system automatically acquires the required parameters through a cloud platform in a cloud storage module, and performs data processing, wherein the model system comprises a parameter calibration and inversion module, a crop water need prediction model, an irrigation system optimization model, an irrigation area water balance computation module and a water usage management module. Theremote, intelligence and high efficiency of the irrigation area and basin water resource monitoring technology are realized by utilizing the modern information technology, the technical support is provided for the hydraulic engineering modern construction and water resource intelligent management, and the modern management level and the water resource utilization efficiency of the irrigation areacan be improved.

The invention discloses an irrigated area canal system surveying method based on GPS (Global Position System) positioning. The irrigated area canal system surveying method comprises the following steps: selecting a surveying object; surveying along a pre-set canal to be surveyed through handheld surveying equipment to obtain position information and images of a plurality of key positions; introducing position information of the plurality of key positions into drawing software, and revising the position information of the plurality of key positions according to a surface feature image of a remote sensing picture; and generating an electronic map of a surveyed object according to the revised position information of the plurality of key positions and the images of the plurality of key positions. The surveying method has the advantages of low cost, simplicity and feasibility, and rapidness and convenience, has strong applicability and meets the requirements of usability and convenience. The embodiment of the invention further discloses an irrigated area canal system surveying system based on the GPS positioning.

The present invention belongs to the technology field of preparing oil refining and petrochemical catalyst and relates to the preparation process of superfine zeolite powder from the superfine zeolite particle-mother liquid colloid suspension formed through hydrothermal process. Technologically, the present invention features that the said suspension is mixed with formaldehyde and urea in certain proportion to obtain mixture solution of pH 2-5; the mixture solution is let stand at 30-80 deg.c for 0.5-24 hr before the solid matter is collected through filtering; and the solid matter is washed, dried and roasted to obtain the superfine zeolite powder. The superfine zeolite powder has regular pore canal system, is silicate (aluminosilicate) crystal containing hetero metal atoms and has primary particle size below 100 nm.

A large-scale irrigation system control method based on distributed model prediction control comprises the following steps that 1) a mathematical model of each canal in an irrigation system is built, and it is taken into consideration how many water inlets and water outlets may each canal have in practical situations; 2) performance indexes of each canal system are built, performance indexes of each canal are taken into consideration under partial cooperation situations, and therefore the system can be converged rapidly, communication traffic is reduced, and meanwhile overall performance can be improved; 3) the distributed MPC algorithm is provided, the optimal input quantity of each canal is calculated under the current situation by means of partial communication, the system is finally converged to a Nash equilibrium point by conducting iteration continuously on the basis of the Nash game theory, and therefore the optimal input quantity at the moment is reached.

The invention relates to a fabricated culvert member and a construction method thereof. The fabricated culvert member comprises a base plate, a rib plate and an arc plate, wherein the rib plate is in a gantry shape and is fixed on both ends of the arc plate, the lower ends of the arc plate and the rib plate are fixed on the base plate, the three plates are integrated, and a space between the arc plate and the base plate is a drainage channel. The fabricated culvert member provided by the invention has the advantages of factory fabrication, field assembly, simple operation, guaranteed quality,quick construction speed, simple structure, reasonable force bearing, simple maintenance (installation, removal and replacement, good integrity, high strength, large adaptive deformation, no pollution, small environmental influence, practicability, economy and obvious effect, the maintenance of the culvert member saves 20-40% human resources, material resources and money less than that of common masonry pebble revetments, town bottom or buried circular pipe culverts, and the water utilization coefficient of the canal system can be greatly increased (evaporation and seepage are reduced).

The invention provides a floating oncomelania blocking device with clamping grooves, which is arranged in an oncomelania sinking tank, and comprises oncomelania blocking walls and clamping grooves which are respectively arranged on the two side walls of the oncomelania sinking tank, wherein the oncomelania blocking walls are respectively inserted in the clamping grooves, and the height of the oncomelania blocking walls is 0.5-0.6m. The device utilizes the clamping grooves and the floating oncomelania blocking walls to replace the traditional bricking concrete wall, when the water flow which contains oncomelania passes by the oncomelania blocking walls, floaters on the water surface can be blocked so that oncomelania is prevented from being spread to the downstream along with the water flow; and moreover, the oncomelania blocking walls can float up and down along with the water level, so the technical problem of an overlarge current-obstruction area under the conditions of canal system drainage, irrigation and other high water levels are effectively solved. The oncomelania blocking walls are reasonable in design and simple in structure, are flexible to install and convenient for getting materials, completely meet the requirements of preventing and controlling oncomelania spreading in a shistosoma affected area, and have a good popularization prospect.

The invention provides a canal system intelligent water-saving system and method. The canal system intelligent water-saving system comprises a central controller, a data processing module, canal flowmeters and water volume control valves; the water volume control valves are connected with the central controller and mounted at water supply openings of a main canal, branch canals, lateral canals and sublateral canals to control the water supply quantity of the canals; the central controller is sequentially connected with the data processing module and the canal flow meters; and the canal flow meters are mounted at the water supply openings of all the canals. According to the method, a hydrodynamic water-saving algorithm model is established, the water distribution amount and the water distribution time of a canal system are adjusted through the system, so that water saving is realized.