Abstract: Current physical resources utilization of a computing system as a whole is monitored. The number of queries concurrently being executed against a database by a database management system (DBMS) running on a computing system is monitored. A query plan for a received query to be executed against the database is generated. The query plan includes operators; the generation of the query plan includes generation of query-based statistics for the received query on a per-operator basis without consideration of the queries concurrently being executed. An estimated execution time of the received query is dynamically predicted using a machine-learning model based on the query-based statistics generated for the received query on the per-operator basis, the current physical resources utilization of the computing system, and the number of queries concurrently being executed. The received query is executed against the database based on the dynamically predicted estimated execution time for the received query.

Abstract: A system (100) and method can monitor a reflectance of a mirror target that includes at least one curved mirror (M). The system (100) can take a first irradiance measurement of the sun (S), the first irradiance measurement representing a direct solar irradiance. The system (100) can take a second irradiance measurement that represents an irradiance from a reflection of the sun (S) from the mirror target plus background irradiance from a reflection of the sky from the mirror target. The system (100) can take a third irradiance measurement that represents the background irradiance from the reflection of the sky from the mirror target. The system (100) can determine a reflectance of the mirror target from the first, second, and third irradiance measurements. The system (100) can compare the reflectance to a specified reflectance threshold, and, upon determining that the reflectance of the mirror target is less than the specified reflectance threshold, can generate an alert signal.

Abstract: A method of selectively connecting mobile devices to 4G and/or 5G networks includes preparing a plurality of isolated 4G and/or 5G networks configured to define a network federation and each having a Radio Access Network (RAN), a PDN Gateway node or a User Plane Function (UPF), and an application server; preparing a plurality of mobile devices; connecting the mobile devices to the networks to exchange data traffic with the application server via, at least, the RAN and the PDN Gateway or UPF node; preparing a connectivity network configured to selectively connect the networks to each other; selecting one reference PDN Gateway or UPF node associated with a network of the federation; and migrating the data traffic associated with all the mobile devices connected to the networks other than the reference network to the application server associated with the reference network that includes the previously selected PDN Gateway or UPF node.

Abstract: Systems and methods are disclosed for a decentralized electronic subscriber identity module (dSIM) and an intelligent multi-chain offloading platform to leverage a plurality of decentralized blockchain-based cellular networks. In one embodiment, an AI-enabled offloading gateway can interconnect a plurality of mobile network operators with said decentralized blockchain-based cellular networks using a dSIM profile. The dSIM profile may contain symmetric and/or asymmetric network access applications, Proof-of-Coverage, and Quality-of-Service applications. The offloading gateway may include of various server nodes exposing network access and blockchain interfaces to mobile operators' systems and subscriber equipment containing dSIM profiles inside embedded or integrated universal integrated circuit cards (eUICCs/iUICCs).

Abstract: A method for operating a wireless power transfer system includes determining a driving signal for transfer of the AC wireless signals, the driving signals based on an operating frequency for the AC wireless signals, a power requirement for the wireless power signals, data contained in the wireless data signals, and one or more thermal mitigation features. Each of the one or more thermal mitigation features are configured to reduce temperature of at least one surface or volume of the wireless transmission system or the wireless receiver system. The method further includes providing the driving signal to an amplifier of the wireless power transmission system and driving a transmitter antenna of the wireless power transmission system, by the amplifier, based on the driving signal.

Abstract: A spark gap assembly that includes a first spark gap segment and a second spark gap segment electrically connected in series with the first spark gap segment. The first spark gap includes a first spark gap and a first grading circuit electrically connected in parallel with the first spark gap. The second spark gap segment includes a second spark gap and a second grading circuit electrically connected in parallel with the second spark gap.

Abstract: A detection unit for discovering cascaded multi-connectivity scenarios in a communication network includes: an interface configured to communicate with the communication network, wherein one or multiple multi-connectivity devices of the network are designed to send type-of-transmission signals to the interface; and an evaluation unit programmed with a cascaded multi-connectivity detection algorithm, wherein the evaluation unit is provided with the type-of-transmission signals and analyzes the occurrence and/or a possible occurrence of cascaded multi-connectivity usage within the communication network based on the type-of-transmission signals.

Abstract: A rotor includes an electromagnetic steel sheet, a first permanent magnet, and a second permanent magnet. The electromagnetic steel sheet includes a first magnet insertion hole and a second magnet insertion hole that are arranged in a V shape, and also includes a center rib between the first magnet insertion hole and the second magnet insertion hole. The rotor satisfies T?W1?2×T?W2, where T is a thickness of the electromagnetic steel sheet, W1 is a minimum width of the center rib, and W2 is a maximum width of the center rib.

Abstract: Provided in the present utility model is a flameproof surge protector, including: a surge protector main body, a flameproof enclosure, a flameproof stopper plug, and a flameproof cable gland. One end of the flameproof enclosure is connected to the flameproof stopper plug, and the other end thereof is connected to the flameproof cable gland. The surge protector main body has an elongated shape and is disposed inside the flameproof enclosure, and a cable is drawn out of the surge protector main body by means of the flameproof cable gland. The flameproof surge protector provided by the present utility model has a simple structure and small size, can be used easily and installed inside an explosion-proof lamp, further protects a circuit inside the lamp, prevents the circuit from being damaged by surges, and is safe and reliable.

Abstract: A method for virtual subscriber identity module (SIM) sharing. The method can include a service provider receiving a request including service details from a first UE. The service provider can verify the request and then generate a first SIM over-the-air (OTA) message. The first virtual SIM-OTA message can be sent to the first UE and causes the first UE to dynamically provision a virtual SIM. The service provider can also generate and transmit a first unique identifier to the first UE. The method can further include the service provider receiving a second unique identifier from a second UE. After determining the first unique identifier matches the second unique identifier, the service provider can generate and transmit a second SIM-OTA message to the second UE. The service provider can then provide the service to the first UE and second UE according to the service details.

Abstract: A linear actuator includes a controlling module, a driving module and a transmission module. The controlling module includes a circuit board, two micro switches and a socket. The two micro switches are electrically connected to the circuit board. A first end of the socket is electrically connected to the circuit board, and a second end of the socket has a plurality of first connecting parts. The driving module is electrically connected to the controlling module and includes a motor and a connecting mount. The connecting mount is electrically connected to the motor and has a plurality of second connecting parts. The second connecting parts are detachably connected to the first connecting parts so as to electrically connect the connecting mount to the socket. The transmission module is connected to the motor and driven by the motor.

Abstract: A T-breaker is an all-in-one solution for dc microgrid fault protection, power flow control, and power quality improvement. A T-breaker features a modular multilevel “T” structure with integrated energy storage devices. The two horizontal arms of the T-breaker realize fault current breaking, load voltage compensation, and power flow control; and the vertical arm of the T-breaker realizes shunt compensation. The configuration provides excellent voltage scalability and relaxes the requirements on the switching signal synchronization during fault transients. The local energy storage in sub-modules eases the fault energy dissipation requirement placed on the traditionally-adopted surge arrestors. The modular multilevel structure also offers immense control flexibility for all types of targeted functions of the provided T-breaker.

Abstract: An example method performed by a wireless-power-transmitting device including an antenna array is provided. The method includes, based on a location of the wireless-power-receiving device, selecting a first value for a first transmission characteristic that is used for transmission of electromagnetic waves by a first antenna group, and a second value, distinct from the first value, for the first transmission characteristic that is used for transmission of electromagnetic waves by a second antenna group. The method also includes transmitting to the location of the wireless-power-receiving device, by the first antenna group, first electromagnetic waves with the first value for the first transmission characteristic, and transmitting to a focal point that is further from the wireless-power-transmitting device than the location of the wireless-power-receiving device, by the second antenna group, second electromagnetic waves with the second value for the first transmission characteristic.