Abstract: The present disclosure is an uninterruptible power supply (UPS) and a power supply system. The UPS includes a first switching module, a rectifier, a second switching module, a direct-current (DC) bus and a controller. A first end of the first switching module is connected to an alternating-current (AC) power supply, and a second end of the first switching module is connected to an input end of the rectifier. Two terminals at a first end of the second switching module are respectively connected to a positive electrode and a negative electrode of a battery pack, two terminals at a second end of the second switching module are respectively connected to the negative electrode and the positive electrode of the battery pack, and a third end of the second switching module is connected to the input end of the rectifier. An output end of the rectifier is connected to a DC bus.

Abstract: An uninterruptible power supply, a control method and a power supply system for normally starting the uninterruptible power supply and securing switch devices are provided. The uninterruptible power supply includes a first rectification circuit, a charge-discharge circuit, a bus capacitor, a first switch circuit and a second rectification circuit. The first rectification circuit is connected to the charge-discharge circuit, and is configured to rectify a voltage outputted by the alternating current power supply. The charge-discharge circuit is connected to the bus capacitor, and is configured to charge the bus capacitor after boosting the voltage outputted by the first rectification circuit, until the voltage across the bus capacitor reaches a first voltage. The first switch circuit is connected to the second rectification circuit, and is configured to connect the alternating current power supply to the second rectification circuit.

Abstract: Provided are a silica aerogel and an aging and drying method thereof. An aging and drying method for a silica aerogel includes: providing a silica sol-gel solution; subjecting the silica sol-gel solution to a first aging to obtain a wet gel, where the first aging is conducted for 24-48 hours; and arranging an organic solvent protective layer on a surface of the wet gel, subjecting a resulting system to a second aging, and drying to obtain the silica aerogel, where the second aging is conducted for greater than 168 hours.

Abstract: Techniques for externally displaying electric vehicle (EV) battery charge status using onboard vehicle display technologies are provided. For example, a method comprises determining, by a system onboard a vehicle comprising a processor, charge status information regarding a state of charge of a battery system of the vehicle that supplies power to a propulsion system of the vehicle, and controlling, by the system, displaying a visual signal of the charge status information using one or more electronic devices integrated on or within the vehicle, the visual signal being visible from a position outside the vehicle. For example, the one or more electronic device can include one or more lights onboard the vehicle and/or an electronic display apparatus onboard the vehicle.

Abstract: Described herein is a method controlling vehicle access, in accordance with one or more embodiments described herein. The method comprises, receiving, by a system onboard a vehicle a command from the driver as the driver exits the vehicle, defining, by the system, a maximum speed value the vehicle can operate based on the received command, determining, by the system, a geographic boundary for the vehicle operation based on the received command, controlling, by the system, operations of the speed limiter component to activate speed limit and operations of the geofencing component to limit operation of the vehicle within the geographic boundary.

Abstract: Advanced keyless vehicle entry and usage control systems and methods are provided. For example, a method comprises performing, by a system onboard a vehicle and comprising a processor, an identification/verification process to identify and verify an identity of a person located within a defined distance relative to the vehicle based on biometric data (e.g., facial image data, voice data, and other biometric data) captured of the person, via one or more sensors located on or within the vehicle. The method further comprises determining, by the system, access authorization information regarding whether the person is authorized to access one or more internal compartments of the vehicle based on verification of the identity of the person, and controlling, by the system, access to the one or more internal compartments via electronically controlling unlocking and locking of an enclosure of the one or more internal compartments in accordance with the access authorization information.

Abstract: A system, comprises: one or more sensors integrated on or within a vehicle; a memory that stores computer executable components; and a processor that executes the computer executable components stored in the memory, wherein the computer executable components comprise: a communication interface component that receives a command from the driver as the driver exits the vehicle; a speed limiter component that defines a maximum speed value the vehicle can operate based on the received command; a geofencing component that defines geographic boundaries for the vehicle operation based on the received command; and a control component operatively connected to the communication interface component, speed limiter component and the geofencing component, wherein the control component activates the speed limiter component to utilizes the maximum speed value and activates the geofencing component to determine the geofencing boundaries to limit the functionality of the vehicle based on the driver's command.

Abstract: Provided are a power conversion device and an uninterruptible power system, with which a cost and a volume of the power conversion device are reduced. The power conversion device includes a conversion circuit, a bus capacitor branch, a resistor module, a first switch module and a controller; an input terminal of the conversion circuit is connected to a power supply, and an output terminal of the conversion circuit is connected to the bus capacitor branch through the resistor module; the first switch module is connected in parallel with the resistor module; and the controller is connected to the first switch module and is configured to control the first switch module to be turned off in a case where the conversion circuit is connected to the power supply and a voltage of the bus capacitor branch is less than a preset threshold, and control the first switch module to be turned on in a case where a voltage of the bus capacitor branch is greater than or equal to the preset threshold.

Abstract: An excitation fuse device and a UPS battery circuit are provided including an excitation fuse and a voltage driving control module including a voltage detection circuit to detect a fuse device voltage and generate a voltage detection signal based on the fuse device voltage and a reference voltage, a fusing controller to receive voltage detection signal and generate a voltage control signal based on voltage detection signal and a fuse detection signal, and a fuse circuit to generate a fusing control signal based on the voltage control signal, which includes a current fuse to be fused based on a short-circuit current and a detonating breaker to be switched off based on the fusing control signal. The current fuse is connected to the fuse circuit through the detonating breaker, the fusing controller is connected to the voltage detection circuit, the fuse circuit and the excitation fuse.

Abstract: Various systems and methods are presented regarding discharging electrical energy from a battery pack, wherein the electrical energy can be discharged, via a battery discharge system, to a receiver system such as a microgrid, an electrical grid, a vehicle, or other suitable system configured to receive/store electrical energy. The battery pack can be discharged to facilitate testing of the battery pack. Discharge of the battery pack can be to a single receiver system or shared across two or more receiver systems. Discharging can be based on available receiver systems, time of day, payment/compensation for the electrical energy, and suchlike. Discharging can also be selected based on a user-preference (e.g., prior choice(s) for previous discharging operation). Discharging can be prioritized, e.g., the electrical grid is undergoing a grid emergency and the discharged electrical energy is directed to the electrical grid to assist the electrical grid in recovering from the grid emergency.

Abstract: Ultrasound attenuation coefficient estimation (“ACE”) techniques that can ameliorate frequency power ratio curve oscillations caused by signal interferences, non-uniform tissue structures, or both, are described. The resulting smoothed frequency power ratio curves enable more accurate ACE and reduced region-of-interest (“ROI”) sizes for linear regression.

Abstract: Disclosed is a control circuit for a relay in an uninterruptible power supply, comprising a plurality of capacitors comprising at least a first capacitor; and a plurality of relays comprising at least a first relay, a second relay, a third relay and a fourth relay, wherein a first terminal of the first relay is connected to a positive electrode of a battery, a second terminal of the first relay is connected to a first terminal of the first capacitor, a first terminal of the second relay is connected to a negative electrode of the battery, a second terminal of the second relay is connected to a second terminal of the first capacitor, a second terminal of the third relay is connected to the second terminal of the first relay, and a second terminal of the fourth relay is connected to the second terminal of the second relay.

Abstract: Ultrasound attenuation coefficient estimation (“ACE”) techniques that can ameliorate frequency power ratio curve oscillations caused by signal interferences, non-uniform tissue structures, or both, are described. The resulting smoothed frequency power ratio curves enable more accurate ACE and reduced region-of-interest (“ROI”) sizes for linear regression.

Abstract: Described here are systems and methods for improved ultrasound attenuation coefficient estimation (“ACE”) techniques. In one aspect, noise can be suppressed by using signal-to-noise ratio (“SNR”) as a quality control metric for restricting depth ranges for ACE. In this way, the proper depth range for each frequency component can be adaptively changed with sufficient SNR for ACE. In another aspect, elevation focusing normalization is used to reduce errors associated with diffraction effects when estimating attenuation coefficient. In another aspect, methods for suppressing noise in ACE techniques is provided. Noise can be suppressed based on a noise field computed from measurements obtained without ultrasound transmission, based on a unique combination of consecutive image frames, based on singular value decomposition (“SVD”) clutter filtering cutoff values, or combinations thereof.

Abstract: Systems and methods are provided to adaptively suppress reverberation clutter signals in ultrasound imaging. A robust principal component analysis (RPCA) may be used to separate a static or low dimension background signal from sparse, moving or high dimension objects in the presence of outliers. A tissue signal may be transformed to the wavelet domain to fulfill the sparsity conditions of RPCA. The use of the RPCA combined with wavelet kernels may be used to suppress reverberation clutter signals to achieve robust ultrasound attenuation coefficient estimation.

Abstract: The present invention belongs to the field of nanomedicine, and provides a DC biomimetic membrane nanoparticle loaded with an NIR-II AIE dye, a preparation method therefor and use thereof. The DC biomimetic membrane nanoparticle loaded with the NIR-II AIE dye comprises a DC membrane and an NIR-II AIE dye loaded therein, wherein the NIR-II AIE dye has photothermal characteristics. The DC biomimetic membrane nanoparticle loaded with the NIR-II AIE dye provided by the present invention not only solves the problem that the NIR-II AIE dye is poor in water solubility and limited in fluorescence imaging, but also increases the enrichment efficiency of the NIR-II AIE dye coated by the DC membrane at a tumor site and successfully activates the activity of T cells in vivo.

Abstract: An uninterruptible power supply, a control method and a power supply system for normally starting the uninterruptible power supply and securing switch devices are provided. The uninterruptible power supply includes a first rectification circuit, a charge-discharge circuit, a bus capacitor, a first switch circuit and a second rectification circuit. The first rectification circuit is connected to the charge-discharge circuit, and is configured to rectify a voltage outputted by the alternating current power supply. The charge-discharge circuit is connected to the bus capacitor, and is configured to charge the bus capacitor after boosting the voltage outputted by the first rectification circuit, until the voltage across the bus capacitor reaches a first voltage. The first switch circuit is connected to the second rectification circuit, and is configured to connect the alternating current power supply to the second rectification circuit.

Abstract: An excitation fuse device and a UPS battery circuit are provided including an excitation fuse and a voltage driving control module including a voltage detection circuit to detect a fuse device voltage and generate a voltage detection signal based on the fuse device voltage and a reference voltage, a fusing controller to receive voltage detection signal and generate a voltage control signal based on voltage detection signal and a fuse detection signal, and a fuse circuit to generate a fusing control signal based on the voltage control signal, which includes a current fuse to be fused based on a short-circuit current and a detonating breaker to be switched off based on the fusing control signal. The current fuse is connected to the fuse circuit through the detonating breaker, the fusing controller is connected to the voltage detection circuit, the fuse circuit and the excitation fuse.

Abstract: Systems and methods for estimating acoustic properties in a region-of-interest in a subject or other object being imaged using a reference frequency method (“RFM”) is described. Using this RFM technique, ultrasound data acquired at a given frequency are normalized by ultrasound data acquired at different frequencies (e.g., adjacent frequencies or otherwise) in order to provide estimations of the acoustic properties (e.g., attenuation coefficient, a backscatter coefficient, or both) that are independent of the ultrasound system used to acquire the underlying data. For instance, the amplitude of each frequency component can be normalized by a different frequency in the power spectrum to cancel out the system-dependent effects. Because the methods described in the present disclosure are system independent, they can be applied to any transducer geometry (e.g., linear or curved arrays) and using any beam pattern (e.g., focused or unfocused).

Abstract: Disclosed is a control circuit for a relay in an uninterruptible power supply, comprising a plurality of capacitors comprising at least a first capacitor; and a plurality of relays comprising at least a first relay, a second relay, a third relay and a fourth relay, wherein a first terminal of the first relay is connected to a positive electrode of a battery, a second terminal of the first relay is connected to a first terminal of the first capacitor, a first terminal of the second relay is connected to a negative electrode of the battery, a second terminal of the second relay is connected to a second terminal of the first capacitor, a second terminal of the third relay is connected to the second terminal of the first relay, and a second terminal of the fourth relay is connected to the second terminal of the second relay.