Abstract: The present invention relates to variant phytase enzymes and their use thereof.

Abstract: The present invention relates to the field of genetic engineering, particularly to a method for efficiently expressing pullulanase in Bacillus subtilis and recombinant Bacillus subtilis. said method includes steps of constructing modified Bacillus subtilis strain with deletion of alkaline protease gene and neutral protease gene, constructing expression vector including an optimized combination of promoter and signal peptide and pullulanase gene, and transforming said modified Bacillus subtilis strain with by said expression vector. A series of combinations of promoter and signal peptide are optimized to obtain the combination for efficiently expressing pullulanase, provide an industrial application basis.

Abstract: Disclosed in the present invention are a sensor packaging structure and a manufacturing method thereof. The sensor packaging structure includes a protection board, a circuit structure and a filling structure. A front surface of the circuit structure is connected to a first surface of the protection board. A second surface of the protection board is used as a sensing function surface. The filling structure is located on the outer periphery of the circuit structure and connected to the first surface of the protection board. The sensor packaging structure of the present invention uses the protection board as a protection layer of the functional circuit, which can effectively protect the functional circuit of the sensor. Meanwhile, the protection board is first connected to the circuit structure in the manufacturing method to avoid tolerance accumulation, increasing the manufacturing accuracy of the protection layer.

Abstract: The present invention relates to the field of genetic engineering, particularly to a method for efficiently expressing pullulanase in Bacillus subtilis and recombinant Bacillus subtilis. said method includes steps of constructing modified Bacillus subtilis strain with deletion of alkaline protease gene and neutral protease gene, constructing expression vector including an optimized combination of promoter and signal peptide and pullulanase gene, and transforming said modified Bacillus subtilis strain with by said expression vector. A series of combinations of promoter and signal peptide are optimized to obtain the combination for efficiently expressing pululanase, provide an industrial application basis.

Abstract: The present invention provides a capacitive fingerprint sensor which images fingerprints by measuring differences between coupling capacitance formed between ridge lines of the fingerprints and corresponding units on planar sensing electrode arrays and that formed between valley lines of the fingerprints and corresponding units on the planar sensing electrode arrays. A conventional “C-Q-T” type capacitive fingerprint sensor employs twice conversion from capacitance to charge quantity and then to integrating time to indirectly measure the capacitance; and the capacitance-charge quantity conversion efficiency can be improved by coupling a human body with a driving signal so as to improve the sensitiveness of the sensor.

Abstract: On the basis of the physical principle that a capacitance value is inversely proportional to the distance between capacitive electrodes, the spatial structure of the surface of an object can be imaged by measuring a coupling capacitance between the surface of measured object and the electrode arrays on a surface of a sensor; for example, imaging may be performed to uneven spaces between ridge lines and valley lines of fingerprints. The present application provides a C-Q-T type capacitive fingerprint sensor. Firstly, coupling capacitance differences between the fingerprints and the electrodes of the sensor are converted into charge quantity differences, then the charge quantity differences are converted into time differences, and edge signals carrying the time differences are output. Fingerprint sensors are grouped into an array, reading and data combination may be performed to the edge signals, and imaging may be performed to fingerprints.

Abstract: The present invention provides a capacitive fingerprint sensor which images fingerprints by measuring differences between coupling capacitance formed between ridge lines of the fingerprints and corresponding units on planar sensing electrode arrays and that formed between valley lines of the fingerprints and corresponding units on the planar sensing electrode arrays. A conventional “C-Q-T” type capacitive fingerprint sensor employs twice conversion from capacitance to charge quantity and then to integrating time to indirectly measure the capacitance; and the capacitance-charge quantity conversion efficiency can be improved by coupling a human body with a driving signal so as to improve the sensitiveness of the sensor.

Abstract: Disclosed in the present invention are a sensor packaging structure and a manufacturing method thereof. The sensor packaging structure includes a protection board, a circuit structure and a filling structure. A front surface of the circuit structure is connected to a first surface of the protection board. A second surface of the protection board is used as a sensing function surface. The filling structure is located on the outer periphery of the circuit structure and connected to the first surface of the protection board. The sensor packaging structure of the present invention uses the protection board as a protection layer of the functional circuit, which can effectively protect the functional circuit of the sensor. Meanwhile, the protection board is first connected to the circuit structure in the manufacturing method to avoid tolerance accumulation, increasing the manufacturing accuracy of the protection layer.

Abstract: A fingerprint identification module, comprising: an electrical mechanism and a mechanics mechanism provided on the periphery of the electrical mechanism, wherein the mechanics mechanism includes an upper cover plate and a force transmission component with a hollowed-out middle portion, the upper cover plate being provided on the top of the force transmission component and forming an accommodation space together with the force transmission component; and the electrical mechanism includes a circuit board and a fingerprint identification chip, the fingerprint identification chip being provided in the accommodation space and being electrically connected to a connection portion of the circuit board, a top end face of the fingerprint identification chip being fixedly connected to a bottom end face of the upper cover plate, and the horizontal height of a bottom end face of the connection portion being higher than that of a bottom end face of the mechanics mechanism.

Abstract: The present invention provides a “C-Q-T” type capacitive fingerprint sensor with an integrator. The integrator comprises an amplifier, an integrating capacitor, a reference voltage and a reset circuit. By applying the present invention, linearity and sensitivity of the “C-Q-T” type capacitive fingerprint sensor are improved. During a conversion process of the “C-Q-T”, through introduction of the integrator, charge transfer quantities between a target capacitor and the integrating capacitor can be consistent for each time, so that a sensing equation is optimized, and better linearity is shown in the conversion process. As influence of a background capacitor and of a bus parasitic capacitor on the sensing equation is removed, the sensitivity of the “C-Q-T” type capacitive fingerprint sensor is improved.

Abstract: On the basis of the physical principle that a capacitance value is inversely proportional to the distance between capacitive electrodes, the spatial structure of the surface of an object can be imaged by measuring a coupling capacitance between the surface of measured object and the electrode arrays on a surface of a sensor; for example, imaging may be performed to uneven spaces between ridge lines and valley lines of fingerprints. The present application provides a C-Q-T type capacitive fingerprint sensor. Firstly, coupling capacitance differences between the fingerprints and the electrodes of the sensor are converted into charge quantity differences, then the charge quantity differences are converted into time differences, and edge signals carrying the time differences are output. Fingerprint sensors are grouped into an array, reading and data combination may be performed to the edge signals, and imaging may be performed to fingerprints.

Abstract: On the basis of the physical principle that a capacitance value is inversely proportional to the distance between capacitive electrodes, the spatial structure of the surface of an object can be imaged by measuring a coupling capacitance between the surface of measured object and the electrode arrays on a surface of a sensor; for example, imaging may be performed to uneven spaces between ridge lines and valley lines of fingerprints. The present application provides a C-Q-T type capacitive fingerprint sensor. Firstly, coupling capacitance differences between the fingerprints and the electrodes of the sensor are converted into charge quantity differences, then the charge quantity differences are converted into time differences, and edge signals carrying the time differences are output. Fingerprint sensors are grouped into an array, reading and data combination may be performed to the edge signals, and imaging may be performed to fingerprints.

Abstract: The present invention provides a “C-Q-T” type capacitive fingerprint sensor with an integrator. The integrator comprises an amplifier, an integrating capacitor, a reference voltage and a reset circuit. By applying the present invention, linearity and sensitivity of the “C-Q-T” type capacitive fingerprint sensor are improved. During a conversion process of the “C-Q-T”, through introduction of the integrator, charge transfer quantities between a target capacitor and the integrating capacitor can be consistent for each time, so that a sensing equation is optimized, and better linearity is shown in the conversion process. As influence of a background capacitor and of a bus parasitic capacitor on the sensing equation is removed, the sensitivity of the “C-Q-T” type capacitive fingerprint sensor is improved.

Abstract: On the basis of the physical principle that a capacitance value is inversely proportional to the distance between capacitive electrodes, the spatial structure of the surface of an object can be imaged by measuring a coupling capacitance between the surface of measured object and the electrode arrays on a surface of a sensor; for example, imaging may be performed to uneven spaces between ridge lines and valley lines of fingerprints. The present application provides a C-Q-T type capacitive fingerprint sensor. Firstly, coupling capacitance differences between the fingerprints and the electrodes of the sensor are converted into charge quantity differences, then the charge quantity differences are converted into time differences, and edge signals carrying the time differences are output. Fingerprint sensors are grouped into an array, reading and data combination may be performed to the edge signals, and imaging may be performed to fingerprints.

Abstract: The utility model discloses an electric heating device with an output greater than an input, including a stator, a rotor, an input controller and a base, characterized in that: the stator is composed of a permanent magnet and an electromagnet, the permanent magnet is disposed externally to the electromagnet. The rotor is composed of a rotor body and a rotor shaft, the rotor body is wholly or partly formed of ferromagnetic material. An end portion at one end of an electromagnet core faces the rotor body and remains a gap with the rotor body. The end portion may be magnetized with an N pole or an S pole under an action of the external permanent magnet. The input controller is connected with an electromagnetic coil. The utility model not only may achieve an output greater than an input, but also may achieve a 100% “output efficiency”.