Abstract: Provided are mutants PHY1, PHY4 and PHY5 of a wild-type phytase APPA. After being treated for 10 min at 80° C., the residual enzyme activities of the mutants PHY1, PHY4 and PHY5 are respectively higher by 33.85%, 53.11% and 75.86% compared with that of APPA-M; after being treated for 5 min at 85° C., the residual enzyme activities of the mutants PHY1, PHY4 and PHY5 are respectively higher by 14.89%, 28.45% and 44.94% compared with that of APPA-M, and the heat resistance of these mutants is significantly higher than that of APPA-M.

Abstract: A method of preparing antimicrobial surface on medical devices: first, producing multi-functional surface with bacterial anti-adhesion and self-cleaning functions through single-stop ultrafast laser fabrication approach for development of micro/nano patterns, then producing bactericidal thin film through depositing metal nanoparticles on those micro/nano patterned surfaces. The combination of bacterial anti-adhesion and bactericidal film can inhibit initial bacterial adhesion and release heavy metal ions to kill the bacteria simultaneously. Meanwhile, the multi-functional surface with self-cleaning function can prevent the killed bacteria from accumulating at the substrate surface, thereby obtaining long-lasting antibacterial effect.

Abstract: Provided are phytase mutants, preparation methods therefor and uses thereof, DNA molecule encoding each of the phytase mutants, a vector comprising the DNA molecule, and a host cell comprising the vector.

Abstract: The present disclosure discloses a coil structure for a dry-type transformer and a winding method therefor. The coil structure for a dry-type transformer comprises multiple coil layers and a supporting framework, which is provided with multiple supporting layers. The spacer blocks of each intermediate supporting layer comprise a rising spacer block for rising and supporting spacer blocks in addition to the rising spacer block, a thickness of the rising spacer block being greater than a thickness of the supporting spacer block, and the rising spacer blocks of several intermediate supporting layers being staggered along the circumferential direction. The present disclosure decreases the height of the entire coil efficiently, meanwhile abates the problem that the wire is centralized in a single area, inhibits the temperature rise phenomenon of transformers efficiently, and prolongs the lifetime of transformers.

Abstract: Generally discussed herein are devices, systems, and methods for wake word verification. A method can include receiving, at a server, a message from a device indicating that an utterance of a user-defined wake word was detected at the device, the message including (a) audio samples or features extracted from the audio samples and (b) data indicating the user-defined wake word, retrieving or generating, at the server, a custom decoding graph for the user-defined wake word, wherein the decoding graph and the static portion of the wake word verification model form a custom wake word verification model for the user-defined wake word, executing the wake word verification model to determine a likelihood that the wake word was uttered, and providing a message to the device indicating whether wake was uttered based on the determined likelihood.

Abstract: A recovery device for an unmanned underwater vehicle (UUV) includes a first recovery component arranged on an unmanned ship and a second recovery component arranged on the UUV. Two magnets are provided on an end of the first recovery component and an end of the second recovery component which are opposite to each other, respectively. A first cable of the unmanned ship is provided on an end of the first recovery component away from the magnet, and a second cable is provided on an end of the second recovery component away from the magnet. A thruster is provided on a side of the first recovery component. The UUV is recovered using the unmanned ship through the recovery components connected to the cables, which allows the locating and navigation errors to a large extent.

Abstract: Provided are mutants PHY1, PHY4 and PHY5 of a wild-type phytase APPA. After being treated for 10 min at 80° C., the residual enzyme activities of the mutants PHY1, PHY4 and PHY5 are respectively higher by 33.85%, 53.11% and 75.86% compared with that of APPA-M; after being treated for 5 min at 85° C., the residual enzyme activities of the mutants PHY1, PHY4 and PHY5 are respectively higher by 14.89%, 28.45% and 44.94% compared with that of APPA-M, and the heat resistance of these mutants is significantly higher than that of APPA-M.

Abstract: Disclosed is an energy-saving bidirectional ship lift by gravity balancing, including: a ship lift body. A first support is provided in a middle of the ship lift body. A second support is provided at a side of the first support. A third support is provided at the other side of the first support. A space between the second support and the first support forms a first shaft. A space between the first support and the third support forms a second shaft. A first ship-carrying chamber and a second ship-carrying chamber are respectively provided in the first shaft and the second shaft to allow two ships to be transported at the same time. An entry water tank and an exit water tank are provided at two sides of each ship-carrying chamber to adjust the weight of the two ship-carrying chambers.

Abstract: A squid-type marine oil containment device includes a track and four oil containment booms. A robotic arm is provided in an elliptic area formed by the track. Sliders are provided on the track. Ends of oil containment booms slide along the track through sliders. Each oil containment boom includes an oil suction pipe, propellers and a plastic separating layer. A middle of the oil suction pipe forms an oil channel. Booster pumps are spacedly provided inside the oil suction pipe and are respectively connected to a hose. Pairs of propellers are spacedly provided at a lower end of the oil suction pipe. Oil suction holes are provided on the oil suction pipe. The plastic separating layer is provided under the oil suction holes. A counterweight is provided at a bottom of the oil containment boom. The invention further provides a method of containing oil using the device.

Abstract: Disclosed is an energy-saving bidirectional ship lift by gravity balancing, including: a ship lift body. A first support is provided in a middle of the ship lift body. A second support is provided at a side of the first support. A third support is provided at the other side of the first support. A space between the second support and the first support forms a first shaft. A space between the first support and the third support forms a second shaft. A first ship-carrying chamber and a second ship-carrying chamber are respectively provided in the first shaft and the second shaft to allow two ships to be transported at the same time. An entry water tank and an exit water tank are provided at two sides of each ship-carrying chamber to adjust the weight of the two ship-carrying chambers.

Abstract: Provided are mutants PHY1, PHY4 and PHY5 of a wild-type phytase APPA. After being treated for 10 min at 80° C., the residual enzyme activities of the mutants PHY1, PHY4 and PHY5 are respectively higher by 33.85%, 53.11% and 75.86% compared with that of APPA-M; after being treated for 5 min at 85° C., the residual enzyme activities of the mutants PHY1, PHY4 and PHY5 are respectively higher by 14.89%, 28.45% and 44.94% compared with that of APPA-M, and the heat resistance of these mutants is significantly higher than that of APPA-M.

Abstract: Representative embodiments disclose mechanisms to separate and recognize multiple audio sources (e.g., picking out individual speakers) in an environment where they overlap and interfere with each other. The architecture uses a microphone array to spatially separate out the audio signals. The spatially filtered signals are then input into a plurality of separators, so each signal is input into a corresponding signal. The separators use neural networks to separate out audio sources. The separators typically produce multiple output signals for the single input signals. A post selection processor then assesses the separator outputs to pick the signals with the highest quality output. These signals can be used in a variety of systems such as speech recognition, meeting transcription and enhancement, hearing aids, music information retrieval, speech enhancement and so forth.

Abstract: A squid-type marine oil containment device includes a track and four oil containment booms. A robotic arm is provided in an elliptic area formed by the track. Sliders are provided on the track. Ends of oil containment booms slide along the track through sliders. Each oil containment boom includes an oil suction pipe, propellers and a plastic separating layer. A middle of the oil suction pipe forms an oil channel. Booster pumps are spacedly provided inside the oil suction pipe and are respectively connected to a hose. Pairs of propellers are spacedly provided at a lower end of the oil suction pipe. Oil suction holes are provided on the oil suction pipe. The plastic separating layer is provided under the oil suction holes. A counterweight is provided at a bottom of the oil containment boom. The invention further provides a method of containing oil using the device.

Abstract: This application provides an intelligent robot for cleaning and mending a net cage and a method of using the intelligent robot, including: a control system, a main body, an attraction module, a motion module, a cleaning module and a mending module. The main body includes a streamlined pressure casing, and a drive mechanism and a water ballast tank which are located in the pressure casing. The attraction module includes electromagnets which are symmetrically provided at a bottom of the pressure casing. The motion module includes first and second motion mechanisms which are symmetrically provided at opposite sides of the pressure casing. A traveling path of the first motion mechanisms is perpendicular to a traveling path of the second motion mechanisms. The intelligent robot achieves cleaning and mending for both sides of the net cage, and is simple to operate, safe, high-efficient, economical and convenient.

Abstract: Generally discussed herein are devices, systems, and methods for wake word verification. A method can include receiving, at a server, a message from a device indicating that an utterance of a user-defined wake word was detected at the device, the message including (a) audio samples or features extracted from the audio samples and (b) data indicating the user-defined wake word, retrieving or generating, at the server, a custom decoding graph for the user-defined wake word, wherein the decoding graph and the static portion of the wake word verification model form a custom wake word verification model for the user-defined wake word, executing the wake word verification model to determine a likelihood that the wake word was uttered, and providing a message to the device indicating whether wake was uttered based on the determined likelihood.

Abstract: Provided are phytase mutants, preparation methods therefor and uses thereof, DNA molecule encoding each of the phytase mutants, a vector comprising the DNA molecule, and a host cell comprising the vector.

Abstract: The present disclosure discloses a coil structure for a dry-type transformer and a winding method therefor. The coil structure for a dry-type transformer comprises multiple coil layers and a supporting framework, which is provided with multiple supporting layers. The spacer blocks of each intermediate supporting layer comprise a rising spacer block for rising and supporting spacer blocks in addition to the rising spacer block, a thickness of the rising spacer block being greater than a thickness of the supporting spacer block, and the rising spacer blocks of several intermediate supporting layers being staggered along the circumferential direction. The present disclosure decreases the height of the entire coil efficiently, meanwhile abates the problem that the wire is centralized in a single area, inhibits the temperature rise phenomenon of transformers efficiently, and prolongs the lifetime of transformers.

Abstract: A method of preparing antimicrobial surface on medical devices: first, producing multi-functional surface with bacterial anti-adhesion and self-cleaning functions through single-stop ultrafast laser fabrication approach for development of micro/nano patterns, then producing bactericidal thin film through depositing metal nanoparticles on those micro/nano patterned surfaces. The combination of bacterial anti-adhesion and bactericidal film can inhibit initial bacterial adhesion and release heavy metal ions to kill the bacteria simultaneously. Meanwhile, the multi-functional surface with self-cleaning function can prevent the killed bacteria from accumulating at the substrate surface, thereby obtaining long-lasting antibacterial effect.

Abstract: An underwater rescue system, including a submersible and a rescue cage. The submersible includes a housing, a turntable and a motor. The turntable is rotatably arranged at an outer surface of the housing. The motor is fixed on the housing and connected to the turntable. The rescue cage includes a connecting rod, a first lifebuoy, a second lifebuoy and an air charging device. A lower end of the connecting rod is provided with an electromagnetic chuck attracting the turntable. An upper end of the connecting rod is connected to the first lifebuoy. A bottom of the first lifebuoy is provided with a load-bearing net. A side of the first lifebuoy is connected to the second lifebuoy by a net bag. The air charging device communicates with the first and second lifebuoys and is configured to charge air to the first and second lifebuoys.

Abstract: ‘Chongyang’ is a distinctive variety of Chinese redbud plant, which is characterized by its florescence.