Abstract: The present disclosure discloses a piezoelectric sensor, an elastic wave sensor, an interactive board, and production methods thereof. For a scenario of interactive boards, the piezoelectric sensor includes a piezoelectric structure and an electrode, the electrode covers the surface of a part of the piezoelectric structure; the working frequency of the piezoelectric sensor is matched with the material frequency, the material frequency is the frequency used to distinguish the material of the touch object in the elastic wave generated by the screen of the interactive board when being touched by a touch object such as a hand and a stylus; under this condition, the piezoelectric sensor can enhance a sensitivity of detecting elastic waves generated by a conventional touch object such as the hand and the stylus when writing on the screen of the interactive board.

Abstract: A real-time radiometric correction method and an apparatus for spectral reflectance are provided. The method includes: obtaining photosynthetically active irradiance measured by a photosynthetically active radiation sensor, where the photosynthetically active radiation sensor includes a cosine corrector; obtaining photosynthetically active irradiance of a target band based on a proportional relationship between the photosynthetically active irradiance and downwelling solar irradiance within a same wavelength range, where the target band is any band in a spectral band obtained by an imaging hyperspectral sensor, and an imaging time point of the imaging hyperspectral sensor is synchronized with a measurement time point of the photosynthetically active radiation sensor; and performing weighted adjustment on the photosynthetically active irradiance of the target band to obtain corrected target irradiance of the target band.

Abstract: Devices with metal structures formed with seams and methods of fabrication are provided. An exemplary method includes forming a metal plug having a top surface formed with a seam; depositing a film over the top surface of the metal plug and at least partially filling the seam; and etching the film from over the metal plug, wherein the film remains in the seam.

Abstract: The disclosure belongs to the technical field of medicine. Provided is a compound containing an oxo-pyrido-aliphatic ring or an aliphatic heterocyclic structure as represented by formula I, and R2, R3, X1, X2, X3, X4, X5, Y1, Y2, A, o and n are as defined in the description. The compound with the new structure described has excellent CGRP antagonistic activity, and has the potential to treat various CGRP-mediated diseases, especially migraines or neuropathic pain.

Abstract: A disposable injection needle is provided. The disposable injection needle includes a needle seat, a first sheath, a second sheath, an inner core, and a spring. an accommodating space is formed between the first sheath and the needle seat, based on the movement of the second sheath into the accommodating space, the inner core rotates from a first circumferential position to a second circumferential position, and at the second circumferential position, the inner core is adapted to be abutted by the spring and move in a direction away from the accommodating space to push the second sheath; and at the second circumferential position, the second engagement structure is adapted to pass over the first engagement structure in a direction away from the accommodating space, and the first engagement structure is adapted to prevent the second engagement structure that has passed over the first engagement structure from moving further in a direction toward the inside of the accommodating space.

Abstract: Provided is a system, method, and computer program product for adversarial training for collaborative filtering. The system includes at least one processor programmed or configured to train a collaborative filtering model through a plurality of iterations by inputting a training data set including adversarial perturbations, update weights of the collaborative filtering model after each iteration or subset of iterations of the plurality of iterations, determine a training loss between each consecutive iteration or subset of iterations of the plurality of iterations, resulting in a plurality of training losses, and determine a loss function for the collaborative filtering model by minimizing a difference between an initial training loss and the plurality of training losses for the plurality of iterations.

Abstract: In one aspect, a system for adjusting flow rate of at least one mobile phase delivered to a liquid chromatography (LC) column is disclosed, which includes a first plurality of pre-calibrated flow modules each configured to receive a first mobile phase at an inlet port thereof and to provide a pre-calibrated range of output flow rates of said first mobile phase at its outlet port, wherein said first plurality of flow modules are configured to provide different ranges of output flow rates of said first mobile phase, and a first selector valve in fluid communication with said first plurality of pre-calibrated flow modules for selecting among said first plurality of pre-calibrated flow modules for selective delivery of said first mobile phase to said LC column, thereby adjusting the flow rate of the first mobile phase delivered to said LC column.

Abstract: A disposable injection needle including: a needle seat, a shell, an inner sheath, an inner core, a first spring, a second spring, and a tail sheath. The tail sheath is disposed at a second end of the needle seat and has a tail sheath hole for the needle tube to pass through. The tail sheath includes an extension member extending substantially in an axial direction, and the tail sheath has a first axial position and a second axial position along the axial extension direction. In the first axial position, the second end of the needle tube is exposed from the tail sheath hole, and in the second axial position, the second end of the needle tube is not exposed from the tail sheath hole. The needle provides rear-end protection for the injection needle to prevent the needle tip from being exposed at the rear end of the injection needle.

Abstract: A method for preparing a modified cobalt-free lithium-rich manganese-based precursor is provided. The prepared modified cobalt-free lithium-rich manganese-based precursor can reduce the large amount of manganese series oxides adhering among and to surfaces of primary particles, causing the primary particles to be uniform and compact. Meanwhile, a specific surface area of the precursor reaches 40-80 m2/g, and a tap density is greater than 1.3 g/cm3. The precursor prepared by using a method of letting an oxidant solution and a reducing agent solution to flow in parallel into a reaction system in the present disclosure has the characteristics of being low in cost, environment-friendly, and pollution-free. To sum up, the cobalt-free lithium-rich manganese-based precursor prepared using the method can not only guarantee excellent indicators and morphology, but also reduce a manufacturing cost, which is in line with the concept of green and sustainable development.

Abstract: An obstacle detection method for assisting in vehicle driving includes (i) obtaining ultrasonic echo data captured during vehicle movement, (ii) obtaining information associated with echo intersections based on the ultrasonic echo data, (iii) providing at least part of the ultrasonic echo data and the information associated with the echo intersections as feature data to a machine learning model to obtain detection information for an obstacle, wherein the machine learning model employs at least one of a classification algorithm or a regression algorithm, and (iv) assisting in vehicle driving based on the detection information for the obstacle.

Abstract: An acyl ethyl ester polycyclic compound, and a pharmaceutical composition and the use thereof. The acyl ethyl ester polycyclic compound is as represented by formula I, wherein X is S or Se. The compound has the effect of preventing or treating individuals infected by viruses.

Abstract: A plastic mold steel plate and a method for producing the same. The method includes: heating a billet, the temperature of a soaking section being 1210~1250° C.; rolling into a steel plate, an initial rolling temperature being 1060~1140° C., and a final rolling temperature being 980~1050° C.; moving the steel plate to a cooling bed for air cooling to 200° C. or lower; then normalizing, a normalizing temperature being Ac3+60° C. to Ac3+90° C.; after normalizing, moving the steel plate to the cooling bed for air cooling to Bf?50° C. to Bf?20° C.; finally, cross-stacking the steel plate with a ferritic pearlitic steel plate with a temperature of 450~550° C.; during the stacking period, self-tempering the steel plate until the temperature of the steel plate is reduced to Bf?50° C. to Bf?20° C.; and after that, unstacking and air cooling.

Abstract: Active semiconductor devices in an integrated circuit are provided lateral electrical isolation by surrounding narrow deep trench isolation regions that are merged at shared portions of the narrow deep trench isolation regions. A wide deep trench isolation region laterally surrounds the merged narrow deep trench isolation regions.

Abstract: Systems and methods are provided for increasing penetration rates of connected vehicles in traffic regions of interest. An example method may comprise: (1) determining a target connected vehicle penetration rate for a traffic region to implement a traffic management strategy; (2) determining trips for connected vehicles to achieve the target connected vehicle penetration rate for the traffic region, wherein the determined trips are predicted to bring the connected vehicles to the traffic region within a target time interval; and (3) autonomously controlling the connected vehicles in accordance with the determined trips. Here, determining a respective trip for a respective connected vehicle may comprises at least one of: )a) changing an original departure time for a pre-planned trip of the respective connected vehicle; or (b) changing an original navigation route for the pre-planned trip.

Abstract: A preparation method of a sulfur-containing biphenylsulfur-containing biphenyl compound shown by the general formula (I) has a reaction formula as follows: Each substituent in the formula is defined in the description. In the method, halogeno benzene shown by the general formula (II) generates a coupling reaction in a catalytic system composed of a nickel compound and at least one ligand under the combined action of metallic zinc to obtain the sulfur-containing biphenyl compound shown by the general formula (I).

Abstract: Devices with metal structures formed with seams and methods of fabrication are provided. An exemplary method includes forming a metal plug having a top surface formed with a seam; depositing a film over the top surface of the metal plug and at least partially filling the seam; and etching the film from over the metal plug, wherein the film remains in the seam.

Abstract: Aspects of the presently disclosed technology may be implemented to provide systems and methods for incentive-based vehicle routing. For example, a method may include determining a suggested route for a vehicle based on a location of a congested area of a road network to decrease congestion of the road network. The method may include determining an individualized incentive for an occupant of the vehicle to incentivize the occupant to follow the suggested route. The method may include transmitting, to the vehicle or to a device of the occupant, a message indicating the suggested route and the individualized incentive for following the suggested route, with the message providing an option for the occupant to accept the suggested route. The method may include, upon the occupant accepting the suggested route, updating an original route of the vehicle to the suggested route thereby directing the vehicle along the suggested route.

Abstract: The present application relates to the technical field of power grid ice-melting, in particular to an AC short-circuit ice-melting control method and an ice-melting distribution transformer. The present application includes a distribution transformer with dual functions of voltage reduction and ice-melting, an ice-melting control system and its control method. The transformer is equipped with two groups of low-voltage output terminals, which are respectively used for power distribution supply and ice-melting operations; the ice-melting control system includes a local intelligent control box and a remote communication control box, and uses a deep reinforcement learning model to calculate the optimal ice-melting power gear and ice-melting time.

Abstract: Dimension reduction is performed for multimodal embedding searches. A request to perform a search using input data of a modality of a multimodal machine learning model is received. The input data is encoded using the multimodal machine learning model to generate a first embedding that represents the input data. A machine learning dimension reduction technique is applied to the first embedding to generate a second embedding with a reduced number of dimensions. This second embedding is then used to search an index of data objects also generated using both the multimodal machine learning model and the machine learning dimension reduction technique.

Abstract: The present disclosure relates to a method for identifying a sample data category, an identification model and a method for training it. The identification method comprises: inputting a sample to an identification model obtained by ensembling a plurality of sub-models including a plurality of branch models that are obtained by training full data of a training set through a preset loss function. Each branch model focuses on a focused category subset in the full data. The method further comprises identifying the category to which the input sample belongs according to the output of the identification model. Different loss functions are set through a plurality of branches respectively focusing on different category subsets in the full-scale training set, and the plurality of branches are finally ensembled to obtain an identification model with high identification capability for all data categories of the full data.