Abstract: Direct current fast charging systems and devices with grid tied energy storage systems. As an example, a multi-unit charging system may include first and second charging stations, each of the first and second charging stations comprising a respective charger configured to transfer energy to an electric vehicle and a respective energy storage system configured to store energy, and a distribution network configured to connect each of the first and second charging stations to an electrical grid.

Abstract: A payment method by a processing server to process payment that is independently performed between a user equipment and a payment channel server is provided. The method includes: generating, by the processing server, a payment order bound to a merchant order generated by a merchant device by determining a corresponding item ID, of a service and/or a product for purchase, that is registered with the payment channel server, the merchant order corresponding to the service and/or the product provided by the merchant device; obtaining, by the processing server, a payment voucher corresponding to the payment order; matching, by the processing server, based on the payment voucher, the merchant order bound to the payment order; and transmitting, by the processing server to the merchant device, based on the matched merchant order, a service/product providing notification for providing the service and/or the product to the user equipment.

Abstract: A range-finding method, a apparatus, a terminal system, and a computer-readable storage medium are provided.

Abstract: An optical fiber filter includes a fiber core, inner cladding, and outer cladding. A refractive index of the fiber core, a refractive index of the inner cladding, and a refractive index of the outer cladding progressively decrease in sequence. The fiber core is configured to transmit at least two mutually different first optical signal modes, the inner cladding is configured to transmit at least two mutually different second optical signal modes, and at least one fiber grating is etched on the fiber core. At least part of optical power of a target first optical signal mode is coupled to only a target second optical signal mode at the fiber grating. The target first optical signal mode is one of the at least two first optical signal modes, and the target second optical signal mode is one of the at least two second optical signal modes.

Abstract: A communication system is provided. The communication system may include few mode fibers of at least two spans and a mode converter. The few mode fiber is configured to transmit M received mode groups, where group delays of the M mode groups during transmission in the few mode fiber are symmetrically distributed about a center. The mode converter is configured to: receive the M mode groups from the few mode fiber, perform mode group exchange between a first mode group and a second mode group in the M mode groups to obtain M exchanged mode groups, where a group delay of the first mode group and a group delay of the second mode group are symmetric about the center.

Abstract: The present invention relates to methods and transformed host cells for the production of eriodictyol from naringenin via bioconversion.

Abstract: A fiber amplifier is provided, including a pump laser (202), a pump and signal combiner (203), and a few-mode doped fiber (204). The pump laser (202) is configured to output pump light. The pump and signal combiner (203) is configured to couple input few-mode signal light and the pump light into the few-mode doped fiber (204). Refractive indexes of a fiber core of the few-mode doped fiber (204) are distributed to be gradient along a radial direction of a cross section, the fiber core is etched with periodic gratings along an axial direction, and periods of the gratings satisfy a phase matching condition. The fiber amplifier achieves strong coupling and co-amplification between optical signal modes, thereby reducing a differential gain between mode groups.

Abstract: A test device and a calibration method thereof are disclosed. The test device for calibrating a test equipment, which is used to test a waterproof level of an electronic apparatus, comprises: two plates, which are pressed against each other with pressure, wherein minor gap between the two plates are used as water leakage path.

Abstract: A monocular visual simultaneous localization and mapping (SLAM) data processing method.

Abstract: A display panel includes a base substrate including a first display region and a second display region disposed on a side of the first display region. The display panel also includes a first anode layer, a first light-emitting layer and a first cathode layer which are disposed in the first display region and are sequentially laminated in a direction distal from the base substrate. The display panel also includes a second anode layer, a second light-emitting layer and a second cathode layer which are disposed in the second display region and are sequentially laminated in a direction distal from the base substrate.

Abstract: A prediction method for coal and gas outburst based on comparing borehole gas flow curves includes the following steps: constructing a seam-crossing borehole in the coal seam, measuring or calculating gas flow corresponding to critical gas pressure P, which is a reference gas flow Q(t)reference; performing linear regression on the reference gas flow Q(t)reference to form a reference flow curve; constructing a predicted seam-crossing borehole in a predicted area, and directly testing a gas flow at each time t in a delayed manner, which is a predicted gas flow Q(t)prediction; prediction; performing linear regression on the predicted gas flow Q(t)prediction to form a predicted flow curve; and judging whether the predicted flow curve is above the reference flow curve or whether the predicted flow curve intersects with the reference flow curve, and judging whether the coal seam in the predicted area has a risk of coal and gas outburst.

Abstract: Provided is a mask, including a mask frame and a mask body including a first mask region and a second mask region; the second mask region includes a first region and a second region; the first region is provided with a plurality of first through holes, and the second region is provided with a plurality of second through holes; the first through holes and the second through holes are arranged along a row direction and a column direction; a shape of the first through hole is a first shape, a shape of the second through hole is a second shape, and the second shape is a centrally symmetric pattern or an axially symmetric pattern; a ratio of a number of the second through holes to a number of the first through holes is less than or equal to 35%.

Abstract: A payment method by a processing server to process payment that is independently performed between a user equipment and a payment channel server is provided. The method includes: generating, by the processing server, a payment order bound to a merchant order generated by a merchant device by determining a corresponding item ID, of a service and/or a product for purchase, that is registered with the payment channel server, the merchant order corresponding to the service and/or the product provided by the merchant device; obtaining, by the processing server, a payment voucher corresponding to the payment order; matching, by the processing server, based on the payment voucher, the merchant order bound to the payment order; and transmitting, by the processing server to the merchant device, based on the matched merchant order, a service/product providing notification for providing the service and/or the product to the user equipment.

Abstract: A bionic visual navigation control system for autonomous aerial refueling docking includes: a tanker/receiver bottom layer control module, a multi-wind disturbances hose-drogue stable control module, an enable and select module, a close-range bionic vision relative navigation module, and a receiver relative position precise control module. A bionic visual navigation control method for autonomous aerial refueling docking is also provided. The present invention aims at improving the reliability, anti-interference and accuracy of the close-range relative navigation in the autonomous air refueling docking stage, and designs a matching relative position accurate control method with control switch, thereby improving the accuracy of close-range navigation and control, thereby promoting the successful realization of probe-and-drogue autonomous aerial refueling and improving the autonomy of UAVs.

Abstract: A modular power converter system includes a plurality of active power link modules (APLMs) coupled to each other, each APLM having a plurality of switching devices including first and second switching devices coupled to each other, and at least one first-type energy storage device (ESD) coupled in parallel with both of the first and second switching devices, the first-type ESD configured to induce a first direct current (DC) voltage. The system also includes a plurality of relays coupled to the first-type ESD, and a charge controller coupled to at least one APLM of the plurality of APLMs and coupled to at least one of an electrical power source and a discharge circuit. The charge controller is configured to alternately charge and discharge the first-type ESD in response to a plurality of switching states including switching states of the plurality of switching devices and the plurality of relays.

Abstract: Disclosed is a test fixture. The test fixture includes a fixture body, a support portion and a first adjustment mechanism; the fixture body is provided with a recess configured for placement of a test camera assembly to be tested, and a depth of the recess is equal to or greater than a thickness of the test camera assembly; the support portion is connected to the fixture body and provided with a support plane parallel to a bottom surface of the recess and configured for placement of a display panel to be tested; and the first adjustment mechanism is arranged on the fixture body and configured to adjust a size of the recess to fasten the test camera assembly.

Abstract: A compound represented by formula I or a pharmaceutically acceptable salt thereof and a use thereof in preparing a drug for treating, stopping or preventing a disease or disorder mediated by FGFR4 activity.

Abstract: An electronic device includes a housing having a front wall and a floating connector assembly coupled to the front wall. The connector assembly includes a panel and a connector. The connector includes a frame attached to the panel and defines first and second alignment openings. A sleeve extends from the frame and extends through the front wall. A removable cover for the electronic device includes first and second connector alignment pins that align with the first and second alignment openings to align the connector sleeve with a connector aperture defined by the cover. The first and second connector alignment pins and the first and second alignment openings can each include tapered portions to move the connector assembly into alignment with the connector aperture as the cover is attached with the housing.

Abstract: The present invention relates to the production of vanillin via the bioconversion of isoeugenol. The bioconversion can be mediated in a cellular system (e.g., an Escherichia coli bacterium), or in an enzymatic reaction mixture without a cellular system.

Abstract: The present invention relates to the production of vanillin via the bioconversion of isoeugenol. The bioconversion can be mediated in a cellular system (e.g., an Escherichia coli bacterium), or in an enzymatic reaction mixture without a cellular system.