Abstract: Provided are a sound gathering device for voiceprint monitoring and a preparation method. The sound gathering device is a cone structure and includes a front end portion (1) and a rear end portion (2), the front end portion (1) is trumpet-shaped, an inner wall surface of the front end portion (1) is present a pattern array of a microstructure (3), and the microstructure (3) presenting the pattern array is formed through laser etching. A sound wave frequency monitored by the sound gathering device is 50 Hz˜10 kHz, and a sound wave enters the sound gathering device from an entrance of the front end portion (1), is reflected through the pattern array of the microstructure (3) on the inner wall surface of the front end portion (1), and is transmitted from an exit of the rear end portion (2), and a sound pressure of the exit of the rear end portion (2) is 4 times˜8 times a sound pressure of the entrance of the front end portion (1).

Abstract: Disclosed is a method for gene expression by transient transformation of a wild rice seed using Agrobacterium. The method includes the following steps: subjecting a wild rice seed to induction culture and subculture in sequence, and selecting a resulting callus with a dense structure to allow pre-culture to obtain a pre-cultured callus; transforming a 1305Ubi-Ubi-GFP-H plasmid carrying a green fluorescent protein (GFP) gene into an Agrobacterium strain EHA105 or LBA4404 to obtain a positive Agrobacterium strain; subjecting the positive Agrobacterium strain to culture to obtain a bacterial suspension with an optical density (OD) value of 0.02 to 0.5 at a wavelength of 600 nm to obtain an infection bacterial solution; and infecting the pre-cultured callus with the infection bacterial solution to allow co-culture and recovery culture in sequence; observing an infection status of a recovered callus under a stereo fluorescence microscope, and calculating a transient expression rate.

Abstract: The present application provides a rocket apparatus and a method for changing an electrical environment in a thunderstorm cloud. A corona probe and an atmospheric electric field detector analyzes and obtains, based on spin angular velocity information of a rocket and inclination attitude information of the rocket that are provided by a gravity gyroscope, accurate strength of a three-dimensional electric field and accurate polarity of a charge in the thunderstorm cloud. A charge-neutralizing agent module externally releases a charged agent whose polarity is opposite to the charge in the thunderstorm cloud, to consume the charge in the thunderstorm cloud via neutralization between a heterocharge carried by the charged agent and the charge in the thunderstorm cloud.

Abstract: The present application provides a rocker device, the rocker device includes a supporting base, a rocker, a deviating element, and a reset assembly. The rocker is provided with a pressing part. The deviating element includes a first end and a second end opposite to each other, and the first end is in contact with the pressing part. The reset assembly is disposed on the second end. When the pressing part presses the first end of the deviating element, the second end of the deviating element deviates, and the reset assembly drives the second end of the deviating element to reset. The assembly of the rocker device in the present application is simple, reducing a frictional resistance between the deviating element and the supporting base, thereby improving usage experience.

Abstract: A method for analyzing signal irregularity of radiation in a lightning leader is provided, which relates to a field of lightning signal processing and includes: S1: acquiring electric field signals; S2: dividing the electric field signals into multiple segments according to time, and calculating an average sample entropy value of each segment of the electric field signals; S3: dividing the multiple segments of electric field signals into three regions according to the time, quantifying irregularity of radiation of the three regions in the leader according to sample entropies and performing classification based on numerical variation characteristics of the irregularity; S4: comparing the classified data with lightning positioning data to form an analysis database; and S5: acquiring real-time electric field signals, calculating average sample entropy values of the electric field signals, and predicting development characteristics of irregular radiation in the lightning leader.

Abstract: An apparatus is provided for determining improved motion planner hyperparameters. The apparatus is configured to: receive a data pair comprising a set of hyperparameters and a utility score defining a utility of a motion planner outcome resulting from the set of hyperparameters; provide a model defining a relationship between the hyperparameters and the utility score; generate trial hyperparameters using a guidance objective configured to evaluate a quality of trial sets of hyperparameters in dependence on the model; determine a trial outcome of the motion planner based on the trial hyperparameters; and determine a new utility score of the trial hyperparameters based on comparing the trial outcome with truth data. The apparatus therefore optimises currently deployed hyperparameters by comparison with truth data in order to provide hyperparameters that can produce realistic motion planning trajectories and outperform currently deployed hyperparameters.

Abstract: According to an example aspect of the present invention, there are provided biomolecules encapsulated with Metal Organic Frameworks (MOFs) for use in intracellular delivery and controlled release of the biomolecules within cells, in vitro and in vivo. The invention also discloses the use of MOFs in combination with biomolecules for gene editing, cancer therapy and vaccine development.

Abstract: A high-voltage permanent magnet frequency conversion all-in-one machine according to an embodiment of the present disclosure includes a frequency converter configured to perform frequency conversion on a high-voltage alternating current, and output at least three alternating currents, a permanent magnet motor configured to receive the alternating currents subjected to the frequency conversion and output from the frequency converter, to drive the motor to operate, and a controller configured to control the frequency converter to perform the frequency conversion on the high-voltage alternating current, and control an operation state of the permanent magnet motor.

Abstract: The present disclosure belongs to the technical field of plant genetic engineering. An objective of the present disclosure is to increase an anthocyanidin content of a rice seed. The present disclosure provides use of ZlMYB1 and ZlMYB2 genes from Zizania latifolia in increasing an anthocyanidin content of a rice seed, where the ZlMYB1 gene has the nucleotide sequence set forth in SEQ ID NO: 1; and the ZlMYB2 gene has the nucleotide sequence set forth in SEQ ID NO: 2. In the present disclosure, the ZlMYB1 and ZlMYB2 genes can be effectively overexpressed in rice. When a growth environment is consistent with that of a control plant, rice seeds from a rice plant overexpressing the ZlMYB1 and ZlMYB2 genes turn black and have a significantly increased anthocyanidin content compared with those from the control plant.

Abstract: Compositions and methods for modifying the production levels of alkaloids in plants are provided. Alkaloid production can be genetically controlled by modulating the transcriptional activation of PMT genes mediated by members of the ERF family and/or Myc family of transcription factors. Novel nucleotide sequences encoding the Myc family of transcription factors are also provided.

Abstract: Disclosed are an implement descending stability control method and system and a tractor. An outlet of a main pump is communicated with an inlet of a main overflow valve, an inlet of a constant-difference overflow valve and an inlet of an implement control valve. An oil outlet of the implement control valve is connected with a spring cavity of the constant-difference overflow valve through a steady-state throttle valve and is communicated with an inlet of a switching valve. An oil outlet of the switching valve is connected with a rodless cavity of a suspension cylinder in a suspension mechanism, and the rodless cavity of the suspension cylinder is communicated with an inlet of a descending valve. A rod cavity of the suspension cylinder is connected with an inlet of a secondary overflow valve.

Abstract: Examples of data processing methods and apparatus are described. One example method includes determining first pose information of a vehicle at a second moment based on pose information of the vehicle at a first moment and a first model, where the first model is a pose estimation model from the first moment to the second moment. Data collected by one or more sensors is obtained. Second pose information of the vehicle at the second moment is determined based on the first pose information and the data.

Abstract: A sensing component of a gyroscope and an opto-MEMS gyroscope comprising said sensing component are provided, the sensing component comprising, a frame; a proof mass configured to be displaced in response to a Coriolis force applied to the sensing component; and a photonic crystal cavity comprising, a first photonic crystal coupled to the proof mass; and a second photonic crystal coupled to the frame; wherein the first and second photonic crystals each comprises an array of holes formed thereon; wherein the photonic crystal cavity is configured to generate an optical output in response to the Coriolis force, and wherein the sensing component is configured to measure the Coriolis force based on changes in the optical output.

Abstract: Compositions and methods for modifying the production levels of alkaloids in plants are provided. Alkaloid production can be genetically controlled by modulating the transcriptional activation of PMT genes mediated by members of the ERF family and/or Myc family of transcription factors. Novel nucleotide sequences encoding the Myc family of transcription factors are also provided.

Abstract: The bonding pad includes a surface electrode layer that has a first surface; a resistance layer that has a second surface; a stress buffer layer that is disposed between the surface electrode layer and the resistance layer in the first direction; and a connecting member that connects the surface electrode layer and the stress buffer layer in the first direction. The connecting member includes an insulator that is in contact with the each of the surface electrode layer and the stress buffer layer in the first direction, and a plurality of plugs that are in contact with the insulator in the direction orthogonal to the first direction and electrically connect the surface electrode layer and the stress buffer layer. In the first direction, a thickness of the stress buffer layer is larger than a thickness of the surface electrode layer.

Abstract: A transformer and a switch-mode power supply are provided. The transformer includes: a magnetic core structure; several windings that surround a same magnetic cylinder in the magnetic core structure in a stacked manner, where the several windings include at least one primary-side winding and at least one secondary-side winding; and an electromagnetic shielding layer that is disposed between at least two adjacent windings, where the two adjacent windings are a primary-side winding and a secondary-side winding, and the electromagnetic shielding layer is made of a magnetic material. The electromagnetic shielding layer of the transformer can suppress a noise current of the winding, to reduce noise.

Abstract: A BIOS error locating method and apparatus, a device, and a storage medium are provided. The method includes: acquiring one or more MAP files which are generated during a compilation process of a BIOS and used for recording an entry address offset of each function; recording a base address of each function module after the BIOS is started, so as to obtain a base address log file; in response to occurrence of an EXCEPTION error during an execution process of the BIOS, executing an Exception handling function, so as to determine, according to the base address log file and the one or more MAP files, a target function that results in the EXCEPTION error; and recording a name of the target function in a serial log, and sending the serial log to a BMC.

Abstract: Several optical micro-electromechanical systems (OptoMEMS) are provided. One of the OptoMEMS comprises an OptoMEMS chip, and a photonic chip coupled to the OptoMEMS chip; wherein the OptoMEMS chip comprises a photonic cavity and a first platform on which the photonic cavity is fabricated, and the photonic chip comprises a waveguide and a second platform on which the waveguide is fabricated; wherein the photonic cavity comprises at least one dielectric beam, each of which further comprises at least one array of air holes; wherein the photonic cavity is at least partially made of a photonic crystal, and the lattice constant of the photonic crystal is reduced or increased gradually in a central region of the photonic cavity, allowing the light of a specific frequency to be trapped in the center region.

Abstract: Several optical micro-electromechanical systems (OptoMEMS) are provided. One of the OptoMEMS comprises an OptoMEMS chip, and a photonic chip coupled to the OptoMEMS chip; wherein the OptoMEMS chip comprises a photonic cavity and a first platform on which the photonic cavity is fabricated, and the photonic chip comprises a waveguide and a second platform on which the waveguide is fabricated; wherein the photonic cavity comprises at least one dielectric beam, each of which further comprises at least one array of air holes; wherein the photonic cavity is at least partially made of a photonic crystal, and the lattice constant of the photonic crystal is reduced or increased gradually in a central region of the photonic cavity, allowing the light of a specific frequency to be trapped in the center region.

Abstract: This application provides example terminal device localization methods and related devices. One example method includes obtaining, from a vector map, a first map point matching a first feature point in a current image frame shot by a terminal device. A second map point matching a second feature point in another image frame before the current image frame is obtained from the vector map. A pose in which the terminal device shoots the current image frame is adjusted based on a target function to obtain, as a localization result of the terminal device, a pose in which the terminal device shoots the current image frame and that is obtained after current adjustment. The target function includes a first matching error between the first feature point and the first map point and a second matching error between the second feature point and the second map point.