Abstract: The present disclosure provides a high-temperature-resistant deep penetration molecular membrane acid copolymer and a preparation method thereof. The copolymer is formed by polymerizing four raw monomers including 2-acrylamido-2-methylpropanesulphonic acid, vinyl phosphonic acid, alkyl dimethylallyl ammonium chloride, and perfluoropolyether acrylate. The method comprises: S1: mixing and stirring solvent oil, an emulsifier, the alkyl dimethyl allyl ammonium chloride, and the perfluoropolyether acrylate to be dispersed homogeneously to obtain an oil phase; S2: mixing and stirring the 2-acrylamido-2-methylpropanesulphonic acid, the vinyl phosphonic acid, a complexing agent, and distilled water, and adjusting pH to obtain an aqueous phase; S3: slowly dropwise adding the aqueous phase to the oil phase; and S4: introducing nitrogen into the water-in-oil emulsion to remove oxygen, then adding an initiator and carrying out a heating polymerization reaction to obtain copolymer emulsion (i.e.

Abstract: The present invention relates to a motor braking performance testing device, comprising: a motor positioning mechanism, a linkage mechanism, a power supply, a speed detection module, a timing module, a standard data storage module, a data comparison module, a test result output module, and a control module. The power supply, the speed detection module, the timing module, the standard data storage module, the data comparison module and the test result output module are all electrically connected to the control module. The present invention has the advantages that the device can test the braking performance of high-speed motors such as motors of lawn mowers, and make test results more accurate.

Abstract: The present invention pertains to the field of oilfield stimulation technologies for oil and gas field development, in particular to an instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof, and the polyacrylamide is modified by adding rigid temperature and salt resistant monomer containing benzene ring and cationic fluorinated hydrophobic monomer on the basis of acrylamide monomer and sodium acrylate monomer, and then polymerized to obtain instant soluble temperature and salt resistant polyacrylamide. The temperature and salt resistant monomer containing benzene ring can improve the thermal stability and temperature and salt resistance of polyacrylamide, while the long-chain cationic fluorinated hydrophobic monomer can enhance the hydrophobicity of polymer. The comprehensive properties of polymer is improved by appropriate intermolecular association.

Abstract: Machine-based verification is minimized by presenting a web page to a user that includes a number of objects in a verification image, and then instructing the user to click on the objects in the verification image in a particular order. The user selected order is then compared to a known correct order, and verification is complete when the user selected order matches the known correct order.

Abstract: A dual-position loop control method and system of a turntable are based on a harmonic speed reduction mechanism. The system and the method use feedbacks from two positions with the help of a first position sensor mounted on a shaft of a motor and a second position sensor mounted on an output end of a harmonic speed reducer respectively. The response is fast at the position of the shaft of the motor, and the second position sensor at the output end of the harmonic speed reducer can directly measure the position of a harmonic output end. Therefore, the influence of nonlinearity factors on the control system is reduced.

Abstract: Machine-based verification is minimized by presenting a web page to a user that includes a number of objects in a verification image, and then instructing the user to click on the objects in the verification image in a particular order. The user selected order is then compared to a known correct order, and verification is complete when the user selected order matches the known correct order.

Abstract: Machine-based verification is minimized by presenting a web page to a user that includes a number of objects in a verification image, and then instructing the user to click on the objects in the verification image in a particular order. The user selected order is then compared to a known correct order, and verification is complete when the user selected order matches the known correct order.

Abstract: Provided are an apparatus and a method of inputting note information to an image of a shot object in order to display an image of a shot object in which the note information has been reflected.

Abstract: Machine-based verification is minimized by presenting a web page to a user that includes a number of objects in a verification image, and then instructing the user to click on the objects in the verification image in a particular order. The user selected order is then compared to a known correct order, and verification is complete when the user selected order matches the known correct order.

Abstract: Provided are an apparatus and a method of inputting note information to an image of a shot object in order to display an image of a shot object in which the note information has been reflected.

Abstract: The present invention is directed to methods of growing a transgenic plant comprising transforming a plant with a nucleic acid encoding the SINAT5 polypeptide of Arabidopsis thaliana. SINAT5 is an E3 ubiquitin ligase which regulates NAC1 gene expression and plant growth. Mutations in the SINAT5 polypeptide are also provided.