Abstract: A foam production method includes mixing liquid nitrogen with a foaming material to produce foam. A gas is produced in situ from liquid nitrogen. As the ratio of the volume of the gas produced by gasification of liquid nitrogen to the volume of the liquid nitrogen is relatively high, when a large gas supply flow is needed to generate a large foam flow, a liquid nitrogen storage device of a small volume can be used instead of bulky air supply devices such as high-pressure gas cylinders, air compressors, air compressor sets and the like, reducing the volume of the air supply device. In addition, the liquid nitrogen used in foaming will release nitrogen gas after the foam blast, such that the nitrogen is also able to inhibit combustion on the surface of burning materials, accelerating the extinguishing of the fire.

Abstract: A method, apparatus and non-transitory computer readable storage medium for driving evaluation are provided. The method includes: collecting a set of performance events during conduction of one or more driving tasks; calculating, based on the collected set of performance events and respective weights for the performance events contained in the collected set of performance events, an aggregated performance indicator.

Abstract: A method for predicting an evolution law of a rock mechanical stratum of a fractured reservoir is provided. A three-dimensional heterogeneous model of mechanical parameters of an intact rock is built by means of a core experiment, logging calculation and seismic inversion; a three-dimensional discrete fracture network geomechanical model is built by means of field observation; effects of fracture parameters on magnitudes and anisotropy of mechanical parameters of a fractured rock mass are analyzed by means of numerical simulation; and a paleo-stress field, and a fracture density and occurrence at different periods are simulated in successive cycles in combination with a relation between the fracture parameters of a reservoir and rock mechanical parameters as well as a stress field, and a migration law of the rock mechanical stratum under the control of a tectonic factor is interpreted.

Abstract: A gas extraction device for metal mineral inclusions and a gas extraction method therefor are provided, the device includes a base plate, an annular carrier, sealing covers, a grinding assembly, a vacuum assembly, a gas-gathering assembly and a mass spectrometer. The annular carrier is disposed on the base plate, multiple grinding chambers are defined and evenly distributed in a circular shape on the annular carrier, the sealing covers are disposed at openings of the grinding chambers, the grinding assembly includes grinding hammers, and the grinding hammers penetrate through the sealing covers and extend into the grinding chambers. Side walls of each grinding chamber defines a first through hole and a second through hole. The vacuum assembly is communicated with the grinding chambers through the first through holes. The gas-gathering assembly is communicated with the grinding chambers through the second through holes. The mass spectrometer is communicated with the gas-gathering assembly.

Abstract: A component of a turbine, in particular a gas turbine, wherein the component has a coating for increasing the erosion and corrosion resistance, wherein the coating is preferably applied directly to the component, wherein the coating consists of a functional layer and an intermediate layer, wherein the intermediate layer is arranged between the turbine blade substrate and the functional layer and wherein the functional layer consists of the elements Al, Cr, O and N.

Abstract: The present invention relates to a coated substrate comprising a substrate surface coated with a coating comprising at least one layer, wherein the at least one layer comprises titanium, aluminum and nitrogen, wherein—the content of aluminum in relation to the content of titanium in the at least one layer comprising titanium, aluminum and nitrogen satisfy Al/Ti>1 by considering only the respective concentrations in atomic percentage of aluminum and titanium in the at least one layer comprising titanium, aluminum and nitrogen, and—the at least one layer comprising titanium, aluminum and nitrogen exhibits wurtzite phase of aluminum nitride and rutile phase of titanium oxide.

Abstract: A component of a turbine, in particular a gas turbine, wherein the component has a coating for increasing the erosion and corrosion resistance, wherein the coating is preferably applied directly to the component, wherein the coating consists of a functional layer and an intermediate layer, wherein the intermediate layer is arranged between the turbine blade substrate and the functional layer and wherein the functional layer consists of the elements Al, Cr, O and N.

Abstract: The present invention relates to a desktop drinking water machine and includes a reverse osmosis mechanism consisting of a reverse osmosis filter and a pair of active carbon filters. The reverse osmosis mechanism is linked to a pump through an inlet pipe, a pure water pipe connected to a reservoir and an outlet pipe connected to the original reservoir where both pipes link the original reservoir to the pump. A water level sensor in the reservoir is linked with the pump through a processor to control a water pumping operation. When the water level rises above the water level sensor, the pump is initiated and delivers water from the reservoir into the reverse osmosis mechanism. Pure water then flows into the storage tank and waste water flows to the reservoir. When the volume of the water in the reservoir is approximately one-third of the volume of the original water maintained in the reservoir, the pump is deactivated.