Abstract: A method for determining a consistency coefficient of a power-law cement grout includes: determining a water-cement ratio of the power-law cement grout; according to engineering practice requirements, determining a time required to determine the consistency coefficient of the power-law cement grout; and obtaining the consistency coefficient of the power-law cement grout. The method is accurate and reliable, requires less calculation, etc.; and has very high practical value and popularization value in environmental protection and ecological restoration.

Abstract: Disclosed is an unmanned food delivery device in a cabin. The device comprises a first conveying mechanism, a second conveying mechanism and a loading and unloading mechanism. The first conveying mechanism comprises a universal conveyor belt, and the universal conveyor belt is driven by universal wheels to convey lunch boxes, and the universal conveyor belt is used for conveying lunch boxes in a kitchen area and a passenger area in a reciprocating manner; multiple second conveying mechanisms are respectively arranged on a luggage rack bottom plate in the passenger area, the luggage rack bottom plate is provided with multiple feeding openings respectively corresponding to seats at intervals, each second conveying mechanism is respectively positioned at the feeding openings, the second conveying mechanisms are connected with the first conveying mechanism and used for conveying lunch boxes by the first conveying mechanism to the seats.

Abstract: A load-energy efficiency evaluation and monitoring method includes an actual part processing number and a theoretical part processing number of the numerical control machine tool within an evaluation period are obtained to calculate a loading performance of the numerical control machine tool. A waste time value and a standby power value of the numerical control machine tool are obtained to calculate a waste energy value of the numerical control machine tool. A single-part actual processing energy consumption is obtained and used, together with a single-part ideal processing energy consumption, to calculate the load-energy efficiency of the numerical control machine tool. A relationship model between the load-energy efficiency and the loading performance of the numerical control machine tool is built based on the obtained model of the load-energy efficiency of the numerical control machine tool and the obtained model of the loading performance of the numerical control machine tool.

Abstract: A load-energy efficiency evaluation and monitoring method includes an actual part processing number and a theoretical part processing number of the numerical control machine tool within an evaluation period are obtained to calculate a loading performance of the numerical control machine tool. A waste time value and a standby power value of the numerical control machine tool are obtained to calculate a waste energy value of the numerical control machine tool. A single-part actual processing energy consumption is obtained and used, together with a single-part ideal processing energy consumption, to calculate the load-energy efficiency of the numerical control machine tool. A relationship model between the load-energy efficiency and the loading performance of the numerical control machine tool is built based on the obtained model of the load-energy efficiency of the numerical control machine tool and the obtained model of the loading performance of the numerical control machine tool.

Abstract: A method of accurately predicting energy consumption of an automatic tool change process is described. Automatic tool change durations at a plurality of groups of rotary tool position numbers are measured and a calculation model of the automatic tool change duration is obtained. A basic module power of machine is obtained. A basic module energy consumption of machine is obtained by calculation based on the basic module power of machine and the automatic tool change duration. A steady state power of tool changer is obtained. A steady state energy consumption of tool changer is calculated. A transient state energy consumption of tool changer is obtained by accumulating energy consumptions. An energy consumption prediction model of the automatic tool change process is obtained using the obtained basic module energy consumption of machine, the obtained steady state energy consumption of tool changer, and the obtained transient state energy consumption of tool changer.

Abstract: Disclosed is a method of accurately predicting energy consumption of an automatic tool change process of a multi-position rotary tool holder of a numerical control machine. In this method, automatic tool change durations at a plurality of groups of rotary tool position numbers are firstly measured and a calculation model of the automatic tool change duration is obtained by fitting. A basic module power of machine is obtained by collection and operation and a basic module energy consumption of machine is obtained by calculation based on the basic module power of machine and the automatic tool change duration. A steady state power of tool changer is obtained by collection and operation and further a steady state energy consumption of tool changer is calculated. A transient state energy consumption of tool changer is obtained by accumulating energy consumptions caused by all power peaks in the automatic tool change process of the numerical control machine.

Abstract: A method and device for rectifying an image photographed by a fish-eye lens, comprising the following steps: acquiring a fish-eye lens mapping parameter and a lens field angle; acquiring a fitted mapping curve according to the lens mapping parameter; acquiring centre coordinate and the radius of a fish-eye circle in a fish-eye image; creating a blank image used for rectifying the image according to the lens field angle; based on the lens field angle, the fitted mapping curve, the centre coordinate and the radius of the fish-eye circle, and the width and height of the blank image, mapping a point on the blank image used for rectifying the image to a corresponding point in the fish-eye image; and based on a colour sample of the corresponding point in the fish-eye image, drawing same onto the corresponding point in the blank image used for rectifying the image, and drawing the rectified image.

Abstract: A method and device for rectifying an image photographed by a fish-eye lens, comprising the following steps: acquiring a fish-eye lens mapping parameter and a lens field angle; acquiring a fitted mapping curve according to the lens mapping parameter; acquiring centre coordinate and the radius of a fish-eye circle in a fish-eye image; creating a blank image used for rectifying the image according to the lens field angle; based on the lens field angle, the fitted mapping curve, the centre coordinate and the radius of the fish-eye circle, and the width and height of the blank image, mapping a point on the blank image used for rectifying the image to a corresponding point in the fish-eye image; and based on a colour sample of the corresponding point in the fish-eye image, drawing same onto the corresponding point in the blank image used for rectifying the image, and drawing the rectified image.