Abstract: The present invention discloses the low-stress niobium nitride (NbN) superconducting thin film and preparation method and application thereof. The preparation method includes the following steps: providing the metal Nb target and the Si-based substrates, fixing the Si-based substrate at room temperature, adjusting the mass flow ratio of N2/Ar to 20%-50%, the sputtering power to 50-400 W and the deposition pressure to 3.0-10.0 mTorr, NbN superconducting thin films with a stress range of-500 MPa˜500 MPa and a thickness of 70-150 nm were deposited on Si-based substrates. By synergistically controlling the mass flow rate ratio of N2/Ar, sputtering power, and deposition pressure, low stress NbN superconducting thin films can be easily and efficiently prepared. The stress range of the prepared NbN superconducting thin films meets the preparation requirements of superconducting dynamic inductance detectors, and can be mass-produced.

Abstract: Disclosed are a barometric pressure sensor and a method for preparing the same, and an electronic device, which relate to the technical field of sensors. The barometric pressure sensor includes a base substrate, and a first capacitor provided on a side of the base substrate. The first capacitor includes a first bottom electrode provided close to the base substrate; a first insulating layer provided on a side of the first bottom electrode away from the base substrate; and a first top electrode provided on a side of the first insulating layer away from the base substrate. The first top electrode is provided with a first opening which is configured to expose the first insulating layer at a corresponding position. A dielectric constant of the first insulating layer may vary with different humidity environments, so that a capacitance value of the first capacitor varies.

Abstract: A single-stage enthalpy enhancing rotary compressor and an air conditioner having same. The single-stage enthalpy enhancing rotary compressor includes: at least one single-stage cylinder, a rotator, an upper flange, and a lower flange. The rotator is arranged inside the cylinder and is rotatable, a compression chamber is formed between the rotator and an inner peripheral wall of the cylinder, a vapor injection opening is defined in at least one of the upper flange the lower flange, and the vapor injection opening is configured to supply gas outside the compressor to the compression chamber directly. According to the present disclosure, two-stage compression is realized without adding an extra cylinder, thereby effectively enhancing a circulation of refrigerant, improving cooling performance of the air conditioner under high environmental temperatures.

Abstract: Various examples of device and system implementations and methods for performing attestation delegation operations are disclosed. In an example, attestation operations are performed by a verifier, including: obtaining endorsement information for attestation of an entity; obtaining an appraisal policy for evaluation of attestation evidence for the attestation of the entity; determining, based on the endorsement information and the appraisal policy, that delegation to a delegate verifier entity is permitted to perform the attestation of the entity; and providing, to the delegate verifier entity, a delegation command to perform the attestation of the entity, wherein the delegation command authorizes the delegate verifier entity to perform attestation operations (e.g., verifier operations) for a domain of entities including the entity.

Abstract: A single-stage enthalpy enhancing rotary compressor and an air conditioner having same. The single-stage enthalpy enhancing rotary compressor includes: at least one single-stage cylinder, a rotator, an upper flange, and a lower flange. The rotator is arranged inside the cylinder and is rotatable, a compression chamber is formed between the rotator and an inner peripheral wall of the cylinder, a vapor injection opening is defined in at least one of the upper flange the lower flange, and the vapor injection opening is configured to supply gas outside the compressor to the compression chamber directly. According to the present disclosure, two-stage compression is realized without adding an extra cylinder, thereby effectively enhancing a circulation of refrigerant, improving cooling performance of the air conditioner under high environmental temperatures.

Abstract: A fault current limiter, including: two inductors, a direct current circuit breaker, a shunt resistor, a first fixed resistor, and metal oxide arresters. The two inductors include wound superconducting wires. The inductors have identical number of windings and identical structure. Magnetic fluxes of the inductors are forward coupled, and the inductors are connected in parallel to form a superconducting inductor structure. The direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker. The metal oxide arresters are two in number, and are connected to two ends of the inductors in parallel.

Abstract: A fault current limiter, including: an inductor, a direct current circuit breaker, a shunt resistor, and a first fixed resistor. The inductor includes wound superconducting wires. The direct current circuit breaker and the inductor are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker.

Abstract: A fault current limiter, including: two inductors, a direct current circuit breaker, a shunt resistor, a first fixed resistor, and metal oxide arresters. The two inductors include wound superconducting wires. The inductors have identical number of windings and identical structure. Magnetic fluxes of the inductors are forward coupled, and the inductors are connected in parallel to form a superconducting inductor structure. The direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker. The metal oxide arresters are two in number, and are connected to two ends of the inductors in parallel.

Abstract: A fault current limiter, including: an inductor, a direct current circuit breaker, a shunt resistor, and a first fixed resistor. The inductor includes wound superconducting wires. The direct current circuit breaker and the inductor are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker.

Abstract: The present invention discloses a single-wheel electric balancing scooter, comprising a wheel, a driving motor located within the wheel, a battery pack serving as a power supply of the driving motor, a self-balancing control system, and a balance signal sensor. A saddle is provided above the wheel; the saddle is mounted on a rack which is connected and fixed to a fixed shaft of the wheel; a handle is provided on a front side of the wheel, with a lower end of the handle being connected to the rack; and a front end of the rack is connected with an auxiliary wheel rack and an auxiliary wheel is provided at a lower end of the auxiliary wheel rack. The present invention has the following advantages that it is easier for driving and better to control the balance of the scooter body; the scooter body may be dragged on the ground; and the scooter body may be kept upright when not in use.

Abstract: The present invention discloses a single-wheel electric balancing scooter, comprising a wheel, a driving motor located within the wheel, a battery pack serving as a power supply of the driving motor, a self-balancing control system, and a balance signal sensor. A saddle is provided above the wheel; the saddle is mounted on a rack which is connected and fixed to a fixed shaft of the wheel; a handle is provided on a front side of the wheel, with a lower end of the handle being connected to the rack; and a front end of the rack is connected with an auxiliary wheel rack and an auxiliary wheel is provided at a lower end of the auxiliary wheel rack. The present invention has the following advantages that it is easier for driving and better to control the balance of the scooter body; the scooter body may be dragged on the ground; and the scooter body may be kept upright when not in use.

Abstract: An apparatus to create decorative artwork on the back of a cell phone protector case including a cell phone protector case having at least a partially transparent back wall with a partially transparent interior surface, a decorative inset card with a decorative image thereon and one or more colored rhinestones which are affixed on the back of the cell phone protector case at the location where the multicolored image is shown through so that the color of the rhinestone matches the color of the image on the decorative insert card which shows through the transparent back wall and transparent interior wall.

Abstract: A cell phone protector case having a soft silicone interior to retain the cell phone in a safe and operative manner. A key unique feature of the present invention cell phone protector case is to connect the inside soft silicone interior and the outside hard plastic protective shell through an innovative mechanism wherein the soft silicon interior has slot openings and the front and back exterior hard plastic shell members have retaining member clips that are inserted into and retained within the receiving openings within the soft silicone interior so that the soft silicone interior has an all around protection on the inside and absorbs shocks while the exterior front and back hard plastic members protect the front and back of the cell phone or any other portable electronic device retained within the protective case.