Abstract: Disclosed is a composition for inhibiting nitrate decomposition and its preparation method, which belongs to a field of photocatalytic technology, comprising: weighing titanium dioxide and pure phase metal carbonate or pure phase metal bicarbonate proportionally; adding the weighed pure phase metal carbonate or the pure phase metal bicarbonate to titanium dioxide for grinding to obtain a metal carbonate/bicarbonate-containing mixture. The method of inhibiting nitrate decomposition using the metal carbonate/bicarbonate of the present disclosure has a significant ability to inhibit nitrate decomposition, and the experimental results show that the method of inhibiting nitrate decomposition using the metal carbonate/bicarbonate can effectively inhibit the decomposition of the nitrate under irradiation for a long time.

Abstract: The present disclosure discloses a rolling ring shrink fitting tool for rotary equipment, including a lifting frame; a movement slot is formed in a bottom surface of a top of the lifting frame; an output end of a first motor is connected with a main gear; guide rollers are embedded in a lifting seat through bearings; shrink fitting plates are two semicircular structures; lifting lugs are welded on outer sides of the shrink fitting plates; tooth rings are arranged outside the shrink fitting plates; stop rods are fixed on inner walls of the tooth rings; supporting screw rods are embedded at sunken positions on inner walls of the shrink fitting plates through bearings.

Abstract: The present disclosure discloses a rolling ring shrink fitting tool for rotary equipment, including a lifting frame; a movement slot is formed in a bottom surface of a top of the lifting frame; an output end of a first motor is connected with a main gear; guide rollers are embedded in a lifting seat through bearings; shrink fitting plates are two semicircular structures; lifting lugs are welded on outer sides of the shrink fitting plates; tooth rings are arranged outside the shrink fitting plates; stop rods are fixed on inner walls of the tooth rings; supporting screw rods are embedded at sunken positions on inner walls of the shrink fitting plates through bearings.

Abstract: A buffer module including a base, a buffer element and an elastic element is provided. The base has a groove. The buffer element includes a spherical body movably disposed in the groove. The elastic element is disposed between a bottom surface of the groove and the spherical body.

Abstract: Embodiments of the present disclosure relate to a method, electronic device and computer readable storage medium for data backup and recovery. The data backup method comprises: receiving data to be backed up and metadata describing the data to be backed up, the data to be backed up comprising a file and a directory, the metadata comprising file data associated with the file and directory data associated with the directory; generating path data associated with both the file and the directory based on the file data and the directory data; and storing the file data, the directory data, and the path data in association with the data to be backed up.

Abstract: A multi-effect energy-saving apparatus for pollution control and utilization of petrochemical water, has a multi-effect treatment device, a post-treatment device, a first loading head, a second loading head, and a third loading head, by combined assembly of devices, the apparatus is simple to disassemble and easy to clean, meanwhile due to the controllable addition of treating agent by using a multi-effect regulator, a fluid outlet connecting member and other components, it is energy-saving and multi-effective, and has excellent treatment effect.

Abstract: A multi-effect energy-saving apparatus for pollution control and utilization of petrochemical water, has a multi-effect treatment device, a post-treatment device, a first loading head, a second loading head, and a third loading head, by combined assembly of devices, the apparatus is simple to disassemble and easy to clean, meanwhile due to the controllable addition of treating agent by using a multi-effect regulator, a fluid outlet connecting member and other components, it is energy-saving and multi-effective, and has excellent treatment effect.

Abstract: A high-efficiency supercritical oil extraction method is provided. According to the method, in an early extraction stage, extraction is performed using an extractant along an extraction kettle from top to bottom; in a middle extraction stage, the extraction kettle is longitudinally flipped by 180 degrees, extraction is still performed using an extractant along the extraction kettle from top to bottom; in a later extraction stage, extraction is performed using a conventional extractant along the extraction kettle from bottom to top. Thus, the pressure effect and the critical extraction effect of the critical extractant are simultaneously exerted, thereby greatly improving the extraction efficiency of supercritical oil extraction, shortening the extraction time, and reducing the dosage of extractant, so as to achieve high-efficiency and low-cost oil extraction.

Abstract: Embodiments of the present disclosure relate to a method, electronic device and computer readable storage medium for data backup and recovery. The data backup method comprises: receiving data to be backed up and metadata describing the data to be backed up, the data to be backed up comprising a file and a directory, the metadata comprising file data associated with the file and directory data associated with the directory; generating path data associated with both the file and the directory based on the file data and the directory data; and storing the file data, the directory data, and the path data in association with the data to be backed up.

Abstract: The present disclosure discloses a method and an apparatus of displaying information in order to solve the problems of a monotonous way of displaying information and a low efficiency of human-machine interaction in existing technologies. The method determines transaction information exchanged between a first user and a second user, determines multimedia information to be displayed based on the determined transaction information for presentation to the second user. Since the disclosed method displays information in form of multimedia information, thus enriching and diversifying the information to be displayed. When transaction information is displayed in form of multimedia information to a second user, multimedia information to be displayed may be automatically matched and converted according to the determined transaction information without the need of a first user to add the multimedia information manually.

Abstract: The present disclosure discloses a method and an apparatus of displaying information in order to solve the problems of a monotonous way of displaying information and a low efficiency of human-machine interaction in existing technologies. The method determines transaction information exchanged between a first user and a second user, determines multimedia information to be displayed based on the determined transaction information for presentation to the second user. Since the disclosed method displays information in form of multimedia information, thus enriching and diversifying the information to be displayed. When transaction information is displayed in form of multimedia information to a second user, multimedia information to be displayed may be automatically matched and converted according to the determined transaction information without the need of a first user to add the multimedia information manually.

Abstract: The present invention provides a voltage acquisition circuit. The voltage acquisition circuit includes a voltage division and sampling module, a voltage to frequency conversion module, and an isolation module. The voltage to frequency conversion module is electrically coupled to the voltage division and sampling module and the isolation module. The voltage division and sampling module is configured to divide and sample a total voltage of a battery pack, and output a voltage signal to the voltage to frequency conversion module. The voltage to frequency conversion module is configured to convert the voltage signal into a first frequency signal, and output the first frequency signal to the isolation module. The isolation module is configured to electrically isolate the first frequency signal, to generate a second frequency signal. The present invention further provides an electric vehicle with the voltage acquisition circuit.

Abstract: A high-efficiency supercritical oil extraction method is provided. According to the method, in an early extraction stage, extraction is performed using an extractant along an extraction kettle from top to bottom; in a middle extraction stage, the extraction kettle is longitudinally flipped by 180 degrees, extraction is still performed using an extractant along the extraction kettle from top to bottom; in a later extraction stage, extraction is performed using a conventional extractant along the extraction kettle from bottom to top. Thus, the pressure effect and the critical extraction effect of the critical extractant are simultaneously exerted, thereby greatly improving the extraction efficiency of supercritical oil extraction, shortening the extraction time, and reducing the dosage of extractant, so as to achieve high-efficiency and low-cost oil extraction.

Abstract: A relay control circuit includes a relay module, a drive module, and a control module. The relay module comprises a plurality of relays and an auxiliary diagnostic unit electrically coupled to the relays. The drive module comprises a drive chip electrically coupled to the relays. The control module comprises a control unit electrically coupled to the drive chip and the auxiliary diagnostic unit. Each of the drive chip and the auxiliary diagnostic unit detects an operating state of each relay, and outputs the operating state of each relay to the control unit. When the operating state of each relay detected by the drive chip or the operating state of each relay detected by the auxiliary diagnostic unit indicates any relay fails, the control unit controls the drive chip to stop operating, and each relay is turned off.

Abstract: The present invention provides a voltage acquisition circuit. The voltage acquisition circuit includes a voltage division and sampling module, a voltage to frequency conversion module, and an isolation module. The voltage to frequency conversion module is electrically coupled to the voltage division and sampling module and the isolation module. The voltage division and sampling module is configured to divide and sample a total voltage of a battery pack, and output a voltage signal to the voltage to frequency conversion module. The voltage to frequency conversion module is configured to convert the voltage signal into a first frequency signal, and output the first frequency signal to the isolation module. The isolation module is configured to electrically isolate the first frequency signal, to generate a second frequency signal. The present invention further provides an electric vehicle with the voltage acquisition circuit.

Abstract: The present invention is a hybrid wind and solar power generator. The system uses a concentrated sun light and diluted sun light to increase the efficiency of the whole system. The combination of solar and wind power generators decreases the cost of common elements for generating electricity.

Abstract: According to one embodiment, a lubricant includes a multidentate perfluoropolyether having a chemical structure of: Re—Rz—Ri—Rz—Ri—Rz—Re, where Rz includes at least one perfluoroethyl ether unit, and where Re and Ri each include at least one functional group configured to attach to a surface. According to another embodiment, the aforementioned lubricant may be suitable for use in a sub-nanometer thick lubricant layer for various applications, and particularly useful for magnetic recording media.

Abstract: According to one embodiment, a lubricant includes a multidentate perfluoropolyether having a chemical structure of: Re—Rz—Ri—Rz—Ri—Rz—Re, where Rz includes at least one perfluoroethyl ether unit, and where Re and Ri each include at least one functional group configured to attach to a surface.

Abstract: The present disclosure discloses a method and an apparatus of displaying information in order to solve the problems of a monotonous way of displaying information and a low efficiency of human-machine interaction in existing technologies. The method determines transaction information exchanged between a first user and a second user, determines multimedia information to be displayed based on the determined transaction information for presentation to the second user. Since the disclosed method displays information in form of multimedia information, thus enriching and diversifying the information to be displayed. When transaction information is displayed in form of multimedia information to a second user, multimedia information to be displayed may be automatically matched and converted according to the determined transaction information without the need of a first user to add the multimedia information manually.

Abstract: A surface agent includes two end portions and a middle portion disposed between the end portions. The end portions include a terminal section and a midsection. The terminal section includes at least one surface active functional group. The midsection includes at least one perfluoroethyl ether unit. The middle portion includes at least one perfluorobutyl ether unit.