A foreign matter detection device is mounted on a non-contact power supply system that supplies power in a non-contact manner from a power supply unit to a power reception unit. The foreign matter detection device includes a magnetic field sensor and a magnetic field generation unit. The magnetic field sensor detects an amount of magnetic flux that changes due to foreign matter existing between the power supply unit and the power reception unit. The magnetic field generation unit is provided separately from the power supply unit and the power reception unit, includes a magnetic field generation coil unit, and generates a magnetic field for driving the magnetic field sensor.

A method for gathering reference data for use in planning and interpreting infrared surveys for the purpose of detecting and locating underground features, such as tunnels, voids, or manmade devices. Measurements, images, or observations at a site having known underground features are recorded. Recorded details include a combination temperatures at or near a soil surface at multiple points across the site in addition to above surface factors such as shading, weather conditions, and objects or foliage. Analysis of the details recorded from the site having known underground features yields quantitative estimates of the effects of various above and below surface factors on temperatures at or near the soil surface.

The present application provides a method for characterizing reservoir micro pore structures, in particular structures smaller than 50 nm and a system therefore. The method can include fabricating a reservoir sheet; fabricating a reservoir sheet electrode using the reservoir sheet; depositing crystal substance in inner pores of the reservoir sheet of the reservoir sheet electrode using chemical deposition; obtaining the crystal substance by removing rock portions of the reservoir sheet in which the crystal substance is deposited; and scanning the shapes of the obtained crystal substance, the result of the scanning being the reservoir micro pore structure.

The present application provides a method for characterizing reservoir micro pore structures, in particular structures smaller than 50 nm and a system therefore. The method can include fabricating a reservoir sheet; fabricating a reservoir sheet electrode using the reservoir sheet; depositing crystal substance in inner pores of the reservoir sheet of the reservoir sheet electrode using chemical deposition; obtaining the crystal substance by removing rock portions of the reservoir sheet in which the crystal substance is deposited; and scanning the shapes of the obtained crystal substance, the result of the scanning being the reservoir micro pore structure.

A method for defining a permissible borehole curvature includes determining curvature characteristics of at least one of a borehole and a downhole assembly in the borehole and calculating an envelope of permissible borehole curvatures from a predetermined location in the borehole based on the curvature characteristics, a direction of the borehole at the predetermined location in the borehole, and a turning angle of the borehole relative to the direction of the borehole at the predetermined location.

The invention relates to a method for detecting and locating hydrocarbon deposits under a body of water in several steps. First, images of a surface of the body of water taken at different times are acquired. Next, for each image, traces of hydrocarbon leaks are identified. Next, a detection map is generated. This map indicates probabilities of the presence of a hydrocarbon leak around the identified traces. The map is obtained by processing the image at least based on a criterion of distance to the identified traces. Finally, the detection maps are combined to produce a hydrocarbon leak location map.

A data analysis apparatus 10 includes; an align unit 11 that acquires a pair data of a first data indicating a characteristic of a specific region and a second data corresponding to the first data and indicating another characteristic of the specific region, and aligns the first data in order of their sizes, a classification model generation unit that groups the pair data based on a characteristic of an order distribution of the first data after alignment, classifies the pair data, and generates a classification model for classifying the pair data using the classification result, a regression model generation unit that performs machine learning for each group, using the first data constituting the pair data and the second data constituting the same pair data, and generates a regression model indicating a relation with the first data and the second data.

A set of geological exploration methods of using the non-section methods and rotary networks formed by triangulated irregulars. It aims to directly construct high-precision three-dimensional models, plans and sections for solving the drawbacks of existing geological exploration methods, such as the dispersion of drill holes, the faults tracking, the controlling of structures, minelayers/stratum/ore bodies, the bending correction of drill holes, and the geological map-making methods.

A set of geological exploration methods of using the non-section methods and rotary networks formed by triangulated irregulars. It aims to directly construct high-precision three-dimensional models, plans and sections for solving the drawbacks of existing geological exploration methods, such as the dispersion of drill holes, the faults tracking, the controlling of structures, minelayers/stratum/ore bodies, the bending correction of drill holes, and the geological map-making methods.

The invention discloses method for determining hydraulic parameters and water inflow in the erosion stage of gravel soil, comprising: calculate the soil particle content P and the soil porosity n of each grade of particle size a, and draw the PSD curve of each grade of particle size and the soil particle content P of each grade of particle size and the PSD curve cluster of each grade of particle size and the soil particle content P of each grade of particle size in each erosion stage; calculate the equivalent diameter D.sub.h of the soil particle, and calculate the minimum equivalent pore diameter d.sub.0 of the soil particle; calculate the critical hydraulic gradient i.sub.cr of particle erosion at each stage; calculate the permeability coefficient k.sub.h; calculate the seepage flow velocity ν and the total seepage flow Q.