Abstract: Provided are a compound as represented by formula (I), and a pharmaceutically acceptable salt, tautomer, mesomer, racemate, stereoisomer, metabolite, metabolic precursor, or drug precursor thereof, and application thereof as a protein regulator, in particular a GSPT1 protein regulator, and a preparation method.

Abstract: The present invention discloses an electro-vibration coupled stress relief system, comprising a host computer, an arbitrary waveform card, a power amplifier, an electromagnetic exciter, an energy amplification device, an acceleration sensor, a charge amplifier, an oscilloscope, a power module, a charging module, an electric energy storage module, a discharge module, a pulse current sampling measurement module and a copper electrode.

Abstract: The present disclosure relates to the field of sodium-ion batteries and discloses a sodium-chromium-titanium-manganese phosphate self-supporting electrode material, and a preparation method therefor and use thereof; the sodium-chromium-titanium-manganese phosphate self-supporting electrode material is a composite material of sodium-chromium-titanium-manganese phosphate and carbon, and the sodium-chromium-titanium-manganese phosphate has a chemical formula of Na3+xCrxTi1?xMn(PO4)3, wherein 0<x<1. The sodium-chromium-titanium-manganese phosphate self-supporting electrode material provided by the present disclosure has a brand-new chemical formula and crystal structure, and an electrode prepared thereby does not need a current collector, a binder, or additional conductive carbon, greatly improving the overall energy density of the electrode.

Abstract: A method for enhancing the stability of an N-type semiconductor through oxygen elimination includes constructing an antioxidant layer on the surface of a semiconductor material, or blending the antioxidant with the N-type semiconductor material. The antioxidant removes the existing oxygen and related species in the N-type semiconductor, eliminates the related trap state, and prevents the N-type semiconductor from further degrading, so that the electrical properties such as mobility of the N-type semiconductor device are improved, and the operation stability and long-term storage stability are improved. In addition, the antioxidant also inhibits the photobleaching of N-type semiconductors and significantly improves the photochemical stability of N-type semiconductors.

Abstract: The present application provides a color LED driving circuit, which comprises a set of switches and a color controller. The switch assembly has a first switch and a second switch, respectively having a first terminal, a second terminal and a control terminal. The first terminal of the first switch is configured to be coupled to a first LED load, and the first terminal of the second switch is configured to be coupled to a second LED load. The color controller comprises a first controller and a second controller. A ground terminal of the first controller is coupled to ground. The first controller is used to generate an output signal according to a PWM signal, and transmit the output signal to the second controller.

Abstract: A switch-mode power supply (SMPS), an SMPS system and a power supply method for an SMPS system are disclosed. The SMPS controller includes an output-voltage power supply unit, a built-in energy storage unit and a logic control unit. The output-voltage power supply unit is configured to charge the built-in energy storage unit using an output voltage from the SMPS system so that the built-in energy storage unit can provide an operating voltage for the logic control unit. The use of a stand-off energy storage capacitor can be dispensed with, and the use of the output voltage as a power supply is enabled. As a result, significant reductions in overall and standby power dissipation are achieved. In addition, the SMPS controller may further include a high-voltage power supply unit, which provides a hybrid power supply solution, together with the output-voltage power supply unit.

Abstract: The present application provides a color LED driving circuit, which comprises a set of switches and a color controller. The switch assembly has a first switch and a second switch, respectively having a first terminal, a second terminal and a control terminal. The first terminal of the first switch is configured to be coupled to a first LED load, and the first terminal of the second switch is configured to be coupled to a second LED load. The color controller comprises a first controller and a second controller. A ground terminal of the first controller is coupled to ground. The first controller is used to generate an output signal according to a PWM signal, and transmit the output signal to the second controller.

Abstract: A switch-mode power supply (SMPS), an SMPS system and a power supply method for an SMPS system are disclosed. The SMPS controller includes an output-voltage power supply unit, a built-in energy storage unit and a logic control unit. The output-voltage power supply unit is configured to charge the built-in energy storage unit using an output voltage from the SMPS system so that the built-in energy storage unit can provide an operating voltage for the logic control unit. The use of a stand-off energy storage capacitor can be dispensed with, and the use of the output voltage as a power supply is enabled. As a result, significant reductions in overall and standby power dissipation are achieved. In addition, the SMPS controller may further include a high-voltage power supply unit, which provides a hybrid power supply solution, together with the output-voltage power supply unit.

Abstract: The present disclosure discloses system resource allocating method and device based on account activity level, wherein the method includes: acquiring an account activity level parameter of a user and calculating an account activity level of each user according to the account activity level parameter of the user; determining an account activity level rank of each user according to the account activity level of the user and a preset account activity level rank dividing manner; establishing an account activity level index of each user according to a user number, the account activity level and the account activity level rank of the user; allocating the system resource for performing the information processing to a target user according to the account activity level index of the target user, where the information processing is to be performed on the target user.

Abstract: The present disclosure discloses system resource allocating method and device based on account activity level, wherein the method includes: acquiring an account activity level parameter of a user and calculating an account activity level of each user according to the account activity level parameter of the user; determining an account activity level rank of each user according to the account activity level of the user and a preset account activity level rank dividing manner; establishing an account activity level index of each user according to a user number, the account activity level and the account activity level rank of the user; allocating the system resource for performing the information processing to a target user according to the account activity level index of the target user, where the information processing is to be performed on the target user.

Abstract: A TRIAC dimmable light-emitting diode (LED) driver circuit is disclosed, compromising: An alternating-current (AC) voltage connected to a rectifier bridge; An LED load, which is connected to an inductor or a transformer, a power MOS transistor, a low voltage MOS transistor and a current sensing resistor. The LED driver also compromises: a peak current comparator which is used to compare the voltage between a current sensing resistor and a reference voltage; a maximum on-time timer, which is used to detect the on time of the low voltage MOS transistor. When the voltage on the current sensing resistor is higher than the reference voltage or the on time of the low voltage MOS transistor reaches the preset time of the maximum on-time timer, the low voltage MOS transistor is turned off.

Abstract: A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.

Abstract: A TRIAC dimmable light-emitting diode (LED) driver circuit is disclosed, compromising: An alternating-current (AC) voltage connected to a rectifier bridge; An LED load, which is connected to an inductor or a transformer, a power MOS transistor, a low voltage MOS transistor and a current sensing resistor. The LED driver also compromises: a peak current comparator which is used to compare the voltage between a current sensing resistor and a reference voltage; a maximum on-time timer, which is used to detect the on time of the low voltage MOS transistor. When the voltage on the current sensing resistor is higher than the reference voltage or the on time of the low voltage MOS transistor reaches the preset time of the maximum on-time timer, the low voltage MOS transistor is turned off.

Abstract: A current ripple canceling light-emitting diode (LED) driver is disclosed. The input current source contains a current ripple. The LED load is connected to the drain of a power switch. The source of the power switch is connected to a current sensing resistor. The gate of the power switch is connected to the output of an operational amplifier. The operational amplifier compares the voltage signal across the current sensing resistor with a dynamic reference voltage. The dynamic reference voltage is adjusted according to the gate or drain voltage of the power switch. The LED load current is controlled to be a nearly no ripple DC current.

Abstract: An average linear light-emitting diode (LED) driver circuit is disclosed. An inputting alternating-current (AC) voltage is connected to a rectifier bridge. An LED load is paralleled with a filtering capacitor and connected to a power switch. A compensation network and a voltage feedback network are included. When the output voltage of the rectifier bridge is higher than the voltage of the filtering capacitor, the drain voltage of the power switch is increased. The voltage feedback network decreases or turns off the current in the power switch. The compensation network controls the average current in the power switch to be equal to the desired LED load current. The average linear LED driver circuit intelligently controls the driver current, reduces the system power loss and increases the system efficiency. The LED driver maintains high conversion efficiency, especially under wide input voltage conditions.

Abstract: Embodiments of the present invention include a method of starting a boost regulator comprising during an initial phase beginning when the boost regulator is powered off, coupling a first current from the input node to the output node to increase a voltage on the capacitor to a first voltage level, during a second phase following the first phase, switching the PMOS transistor and the NMOS transistor, during a third phase following the second phase, turning said PMOS off and switching said NMOS transistor, and during a fourth phase, synchronously switching the PMOS transistor and NMOS transistor.