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52 results about "Intermediate depth" patented technology

Intermediate Depth Drill. The U.S. Intermediate Depth Drill (IDD) is the next generation of the Danish Hans-Tausen Drill and Danish Deep Drill, with the capability of producing 2-meter long cores.

Method for measuring rice field profile soil bulk densities rapidly, simply and conveniently

The invention discloses a method for measuring rice field profile soil bulk densities rapidly, simply and conveniently. The method comprises the particular steps that a soil auger is vertically driven into rice field soil, and when the acquisition soil profile depth is D, the soil auger is driven to a position of a same depth D cm; n layers are divided to take soil samples according to research requirements after the soil samples are taken out, and corresponding depths of the layers are 0-D/n, D/n-2D/n, 2D/n-3D/n, 3D/n-4D/n,... (n-1) D/n D. The taken soil samples are dried and weighed and the weighed soil samples are divided by corresponding volumes respectively to obtain soil bulk densities of corresponding soil layers. According to the method for measuring rice field profile soil bulk densities rapidly, simply and conveniently, the rice field profile soil bulk densities can be measured rapidly, simply and conveniently; soil depths can be adjusted according to requirements to measure soil bulk densities; and limits of fixed depths of cutting rings or the taking of intermediate depths merely to represent soil bulk densities of certain layer depths are broken through. Compared with traditional methods which use cutting rings to dig profiles to measure field profile soil bulk densities, the sampling related ground surface soil area is small, disturbed soil layers are small, and the labor force is saved for more than 400%.
Owner:INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI

Method for improving frame rate of stereoscopic video depth map sequence

ActiveCN103260032AOptimizing Motion Estimation ResultsGuaranteed Computational ComplexityTelevision systemsDigital video signal modificationStereoscopic videoPattern recognition
According to a method for improving the frame rate of a stereoscopic video depth map sequence, two adjacent frames of depth maps serve as two reference frames, and a middle depth map is constructed to be inserted between the adjacent frames of depth maps. The depth information of a macro block of the middle depth map is obtained according to the following steps: bi-directional motion estimation is carried out to obtain a matching cost and an initial motion vector of the current macro block; bi-directional motion compensation is carried out to obtain the initial depth information of the current macro block; if the smallest matching cost is smaller than a preset threshold value, the initial depth information serves as the depth information of the current macro block, otherwise the initial depth information is utilized to form a texture block, corresponding to a virtual viewpoint, of the current macro block; the matching cost of the texture block is calculated; the combined matching cost of the current macro block and the texture block is calculated to obtain the final motion vector; and the final motion vector is used for carrying out the bi-directional motion compensation to obtain the depth information of the current macro block. The method for improving the frame rate of the stereoscopic video depth map sequence is more accurate and reliable in the depth information, and can guarantee algorithm complexity.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Simulation test method of temperature field of asphalt concrete pavement

The invention discloses a simulation test method of a temperature field of an asphalt concrete pavement. An actual solar radiation changing period and a temperature field changing rule of a to-be-simulated asphalt concrete pavement are detected and the detected actual solar radiation changing period and temperature field changing rule are recorded; the solar radiation is simulated by using ultraviolet radiation of an ultraviolet lamp and an air temperature is adjusted by using an air temperature regulator; a temperature field is generated in a full-thickness asphalt concrete test piece, an infrared camera tests surface temperature distribution of the test piece after stabilization, drilling is carried out in a red region of the surface temperature field and the depths of the drilled holes reach intermediate depths of all surface layers of the full-thickness asphalt concrete test piece, and a temperature sensor is installed; and according to the internal temperature measurement result of the asphalt concrete test piece, the air temperature and the ultraviolet light intensity are adjusted, so that the asphalt concrete test piece generates temperature distribution equivalent to the actual temperature field of the to-be-simulated asphalt concrete pavement. According to the invention, the simulated temperature field is close to the temperature field of the actual pavement, so that the accurate reference data are provided for the road research staff and the damage process of the asphalt concrete pavement is analyzed conveniently.
Owner:WUHAN UNIV OF TECH +1

Completion system for subsurface equipment

A concentric tubing well completion method and a subsurface annular flow crossover system are provided. The well completion method creates at least three separate, pressure isolated annular flow channels in a wellbore. The subsurface crossover provides for switching fluid flow between the annular flow channels within the completed well. The crossover system can be used in conjunction with other subsurface equipment to more efficiently manage fluid flows in the completed well. For example, fluid from any subsurface reservoir or separate reservoirs can be delivered to the surface. In addition, flow paths can be provided for a fluid circulation loop from the surface, a subsurface fluid lifted to the surface or a fluid moved to a different depth in the well for reinjection. The subsurface crossover also provides a method to shift the fluids from one annular fluid channel to another. The subsurface annular flow crossover system also allows the installation of a device at any intermediate depth in the well while allowing fluid flow past the device thus eliminating the disruption or blocking of the flow for the purposes of heat and produced fluid extraction. For example, the crossover can be used to maintain separation between a working fluid and produced fluids in a subsurface heat exchanger used in a geothermal well or a subsurface turbomachinery such as a subsurface pump.
Owner:GREENFIRE ENERGY

Intermediate-depth part geothermal energy heating system

An intermediate-depth part geothermal energy heating system comprises a vertical well vertically extending to the underground part by 2,000 m, and a butt joint well communicating with the vertical well, wherein the vertical well and the butt joint well are the same in depth. After the butt joint well is vertically downwards dug by 1,700 m, an arc deflection section is arranged to be connected with the part, at the underground position of 2,000 m, of the vertical well. Communicating casing pipes are laid in the vertical well and the butt joint well. The casing pipe at an outlet of the vertical well is connected with the heat absorbing side of a ground source heat pump through a water pump. An outlet in the heat absorbing side of the ground source heat pump communicates with the casing pipe in the butt joint well to form a closed circulation loop, and the heat exchange side of the ground source heat pump is connected with a tail end user. The vertical depth of the casing pipes is increased to 2,000 m from the conventional depth of 100 m, the vertical well and the butt joint well are effectively connected in the deep soil, a horizontal heat exchange pipeline is established at the underground position of 2,000 m, a closed circulation system is adopted, softened fresh water efficiently exchanges heat with deep rock soil, and the deep geothermal energy is extracted to be used for building heat supply.
Owner:XI AN JIAOTONG UNIV
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