Abstract: Provided herein are systems, methods, and cryoprotective solutions for reversible cryopreservation of biological specimens, whole organs, and whole organisms. Exemplary methods include loading a cryoprotective agent into the biological specimen, cooling the biological specimen to a cryogenic temperature for preservation, storing the biological specimen at a preservation temperature state to preserve the biological specimen, rewarming the biological specimen by increasing a temperature of the biological specimen above the preservation temperature state, and unloading the cryoprotective agent from the biological specimen. The cooling is performed at a first rate to reduce ice formation, substantially homogeneously to reduce propensity for cracking of the preserved biological specimen, and at a first pressure to prevent or reduce ice expansion within the preserved biological specimen.

Abstract: A power supply device, a circuit control method and a power supply system, belonging to the field of power supply conversion technologies. The power supply device can ensure that a second-stage conversion circuit has a sufficiently high valley voltage by means of a valley-fill circuit without using an electrolytic capacitor or other large-volume capacitors, thereby ensuring that the output voltage of the power supply device is overall stable. On the other hand, the power supply device can, by controlling the voltage of an energy storage unit, utilize the ability of the energy storage unit to store electric energy as far as possible whilst ensuring that the voltage does not exceed a specific voltage, so as to lower the requirements on the voltage resistance of the energy storage unit, thereby realizing the miniaturized design of the power supply device and improving the portability of the power supply device.

Abstract: A power supply device includes a transformer, a first rectifier, a voltage conversion module, and a control unit. The first rectifier is connected to a primary winding of the transformer, converts a received alternating-current voltage to a first direct-current voltage. The transformer is configured to convert the first direct-current voltage to a second direct-current voltage. The voltage conversion module is connected to the secondary winding of the transformer and configured to convert the second direct-current voltage to output a third direct-current voltage. The control unit, connected to the voltage conversion module, controls the voltage conversion module to adjust an output voltage or an output current of the power supply device.

Abstract: Provided herein are systems, methods, and cryoprotective solutions for reversible cryopreservation of biological specimens, whole organs, and whole organisms. Exemplary methods include loading a cryoprotective agent into the biological specimen, cooling the biological specimen to a cryogenic temperature for preservation, storing the biological specimen at a preservation temperature state to preserve the biological specimen, rewarming the biological specimen by increasing a temperature of the biological specimen above the preservation temperature state, and unloading the cryoprotective agent from the biological specimen. The cooling is performed at a first rate to reduce ice formation, substantially homogeneously to reduce propensity for cracking of the preserved biological specimen, and at a first pressure to prevent or reduce ice expansion within the preserved biological specimen.

Abstract: A power supply device includes a transformer, a first rectifier, a first voltage conversion module, a second voltage conversion module, and a control unit. The first rectifier, connected to a primary winding of the transformer, converts a received alternating-current voltage to a first direct-current voltage. The first voltage conversion module is connected to the first secondary winding of the transformer. The second voltage conversion module is connected to the second secondary winding of the transformer. The control unit, connected to the first voltage conversion module and second voltage conversion module, controls the first voltage conversion module or second voltage conversion module to adjust an output voltage or an output current of the power supply device.

Abstract: Disclosed in the embodiments of the present application is a power conversion circuit, comprising a direct current conversion circuit, a pulse width control circuit, and a transformer. The transformer comprises a primary transformer coil and a secondary transformer coil. The direct current conversion circuit is connected to the primary transformer coil, and is used for adjusting an initial voltage inputted to the direct current conversion circuit to a target voltage. The pulse width control circuit is connected to the primary transformer coil, and is used for generating a pulse square wave on the basis of the target voltage. The primary transformer coil is coupled with the secondary transformer coil. The primary transformer coil is used for generating an electromagnetic filed according to the pulse square wave, and coupling the electromagnetic field to the secondary transformer coil so that the secondary transformer coil generates an output voltage.

Abstract: A power supply, a power supplying method, and a computer-readable storage medium are provided. The power supply includes a rectifier circuit and a valley-fill circuit. The rectifier circuit is used for voltage transformation of an input AC voltage to obtain a first pulsating DC voltage. The valley-fill circuit includes at least one energy storage capacitor and is used for storing energy through the at least one energy storage capacitor when the first pulsating DC voltage output by the rectifier circuit is in a first preset range and providing energy through the at least one energy storage capacitor when the first pulsating DC voltage output by the rectifier circuit is lower than a preset threshold, thereby to increase the valley voltage of the first pulsating DC voltage.

Abstract: A power supply device includes: an input rectifier circuit configured to convert a received alternating-current power into a first pulsating direct-current voltage; a first-stage conversion circuit connected with the input rectifier circuit and configured to convert the first pulsating direct-current voltage into a second pulsating direct-current voltage; a valley-fill circuit connected with the first-stage conversion circuit and configured to supply, in response to a voltage value of the second pulsating direct-current voltage being lower than a voltage threshold, electrical power to thereby enable the voltage value of the second pulsating direct-current voltage to be greater than or equal to the voltage threshold; and a second-stage conversion circuit connected with the first-stage conversion circuit and configured to convert the second pulsating direct-current voltage into a constant direct-current voltage and output the constant direct-current voltage.

Abstract: Provided are an adapter and a charging method. The adapter includes: at least one filter capacitor (210) having a capacitance smaller than a predetermined threshold and configured to filter a rectified alternating current to obtain a pulsating direct current; and a voltage transformation module (220) configured to transform the pulsating direct current to obtain a voltage and a current for charging a device to be charged. The adapter for charging a battery is provided, the volume of the adapter can be reduced and the miniaturization of the volume of the adapter can be realized.

Abstract: A power supply system and a control method therefor, and an electronic device are provided. The power supply system includes: a plurality of battery cells, connected in series with each other; a first power supply circuit, configured to generate a first power supply voltage of the power supply system based on a series voltage of the plurality of battery cells; a second power supply circuit, configured to generate a second power supply voltage of the power supply system based on a voltage of a subset of the plurality of battery cells; and a switch circuit, configured to control at least one of the first power supply circuit or the second power supply circuit to be turned on or turned off based on the first power supply voltage and the second power supply voltage.

Abstract: The present application relates to a charging and discharging balance control method, a system and an electronic device. The method includes: obtaining status information of a plurality of batteries connected in series during the charging or discharging process; and, according to the capacities and the state information of the plurality of batteries, adjusting the charging current and/or discharging current of the battery connected to at least one balancing branch, such that the voltage difference of the plurality of batteries is within a preset range. Therefore, the charging or discharging rates of batteries having different capacities may be balanced under the condition of current balancing adjustment, so as to ensure that the batteries may be simultaneously fully charged or completely discharged. Thus, the structural space of devices having foldable screen forms or irregularly-shaped battery compartments may be utilized to the maximum extent.

Abstract: The present application relates to a DCDC circuit, a circuit start-up method, and an electronic device. The DCDC circuit includes a transformer circuit, a synchronous rectification circuit, and a control circuit; wherein the control circuit is configured to control a turn-on duration of a first switch and a turn-on duration of a second switch in a first bridge circuit of the transformer circuit to increase progressively every switching cycle until an output voltage of the transformer circuit is greater than a first target voltage; and control a turn-on duration of a third switch and a turn-on duration of a fourth switch in a second bridge circuit of the synchronous rectification circuit to increase progressively every switching cycle until an output voltage of the synchronous rectification circuit is greater than a second target voltage.

Abstract: Provided by the present disclosure are a power supply circuit and a charging device. The power supply circuit comprises a pulse transformer circuit and a first power supply conversion circuit. The pulse transformer circuit comprises a pulse transformer and a switch control circuit; a primary winding of the pulse transformer is connected to a power supply and is connected to the switch control circuit, and the switch control circuit is used to modulate the voltage on the primary winding into a pulse voltage; and the input terminal of the first power supply conversion circuit is connected to a secondary winding of the pulse transformer, and is used to transform the voltage on the secondary winding of the pulse transformer into a first preset voltage range when the voltage outputted by the secondary winding exceeds the first preset voltage range, and then output the voltage.

Abstract: A rechargeable device and a charging method are disclosed. The rechargeable device includes a charging interface, a battery unit, a first switch unit and a second switch unit, a first control unit coupled to the first switch unit, and a second control unit coupled to the second switch unit. The first control unit is configured to control the first switch unit to be turned on in response to the charging path being needed to be on, and to control both the first switch unit and the second switch unit to be turned off in response to the charging path being needed to be off. The second control unit is configured to control the second switch unit to be turned on or off in response to the first control unit controlling the first switch unit to be turned on.

Abstract: A charging circuit is provided. The charging circuit is applied to an electronic device. The charging circuit includes a resonant circuit and a voltage transformer circuit. The resonant circuit is configured to convert a received DC signal into an AC signal. The voltage transformer circuit includes a primary winding and a secondary winding. The primary winding is connected to an output end of the resonant circuit. The primary winding is coupled to the secondary winding. The voltage transformer circuit is configured to transform a first voltage of the AC signal into a second voltage through the primary winding and the secondary winding. The second voltage is configured to supply electrical energy to an electricity-consuming apparatus. The second voltage is less than or equal to the first voltage.

Abstract: The voltage conversion circuit includes a first direct-current conversion circuit connected to an electric load, a secondary transformer coil connected to the first direct-current conversion circuit, and a primary transformer coil coupled to the secondary transformer coil. The primary transformer coil is configured to generate, based on an initial voltage inputted to the primary transformer coil, an electromagnetic field and couple the electromagnetic field to the secondary transformer coil. The secondary transformer coil is configured to generate an induced current by virtue of the electromagnetic field, generate a secondary output voltage based on the induced current, and transmit the secondary output voltage to the first direct-current conversion circuit. The first direct-current conversion circuit is configured to adjust, based on a predetermined demand voltage of the electric load, the secondary output voltage to obtain a target voltage.

Abstract: An adapter and a control method are provided. The adapter includes a transformer, at least one first transistor, a control unit, and a first microwave unit. The at least one first transistor is connected to a primary side of the transformer, and is configured to perform a chopping modulation on a voltage input to the transformer. The control unit is configured to output a first control signal. The first microwave unit includes a first transmitting terminal and a first receiving terminal. The first transmitting terminal is configured to convert the first control signal into a first microwave signal and transmit it to the first receiving terminal of the first microwave unit. The first receiving terminal is configured to convert the first microwave signal into the first control signal to control the at least one first transistor to be turned on or off.

Abstract: A power supply device, includes a rectifier circuit configured to perform rectification on alternating-current power to obtain a first pulsating direct-current voltage, a first-stage conversion circuit connected to the rectifier circuit and configured to perform isolation conversion on the first pulsating direct-current voltage to thereby obtain a second pulsating direct-current voltage; a second-stage conversion circuit connected to the first-stage conversion circuit and configured to convert the second pulsating direct-current voltage into a stable direct-current voltage; and a valley-fill circuit connected to the rectifier circuit and the first-stage conversion circuit individually, wherein the valley-fill circuit is configured to supply, in response to a voltage value of the first pulsating direct-current being less than a first voltage threshold, electrical power to an input of the first-stage conversion circuit to thereby increase a valley voltage of the first pulsating direct-current voltage.

Abstract: The present invention provides a method for analysis and determination of the heavy metal occurrence key mineral phases in industrial solid waste, by performing N concentration gradients dissociation determination of the heavy metal solid waste to be tested under the same dissociation conditions, to give the dissociation degrees of the heavy metal elements to be tested at N different concentration gradients; the dissociated solid residues after dissociation being quantitatively analyzed for the mineral phase, to give the relative content of each mineral phase in the M mineral phases of the heavy metal solid waste to be tested; then calculating to give the occurrence distribution proportion of the heavy metal elements in the mineral phase, which are accumulated from high to low; the occurrence key mineral phase whose cumulative occurrence proportion exceeds the preset cumulative threshold value is determined to be the key mineral phase of the heavy metal elements.

Abstract: Provided are a power supply conversion device and a charging control method. The device includes: a transformer; a first rectifier circuit connected to a primary winding of the transformer, for converting a received alternating current into a first direct current, a voltage value of the first direct current being a first direct-current voltage, and the transformer is used for converting the first direct-current voltage into a second direct-current voltage; a voltage converter connected to a secondary winding of the transformer, for converting the second direct-current voltage to output a constant direct-current voltage or a pulsating direct-current voltage; and a controller connected to the first rectifier circuit and the voltage converter, for controlling the voltage converter to selectably output the constant direct-current voltage or the pulsating direct-current voltage according to a desired charging mode of a device to be charged.