Abstract: A high-sulfur petroleum coke-based sulfur self-doped mesoporous carbon-supported Fe-TM bimetallic alloy catalyst, and a preparation method and use thereof are provided. The catalyst is an Fe-TM solid-solution alloy material supported on sulfur self-doped mesoporous carbon, formed by calcination under an inert atmosphere and reduction calcination under a hydrogen atmosphere after activation of high-sulfur petroleum coke by potassium ferrate. The catalyst can significantly reduce the peak dehydrogenation temperature of magnesium-based materials by 80 to 110 K. The catalytic effect is comparable to that of catalysts prepared by conventional routes, but the catalyst exhibits remarkable cost-effectiveness and environmental advantages, demonstrating the significant industrialization potential of high-sulfur petroleum coke in the field of hydrogen storage.

Abstract: A method includes obtaining topology information of a common subnet corresponding to a display request specific to a first network resource, where the common subnet includes a first subnet and a second subnet, the first subnet is a subnet that includes the first network resource, the second subnet is a subnet other than the first subnet, and the topology information includes information about at least one network resource of the first subnet and the second subnet, and a connection relationship between the at least one network resource; and displaying the first network resource in a distinguishable manner on a basis of displaying the topology information.

Abstract: Disclosed in the present disclosure is a predictive channel modeling method based on a generative adversarial network and a long short-term memory artificial neural network, which method effectively achieves a channel prediction function in different frequency bands and scenarios, and generates a large number of channel data sets for simulation experiments.

Abstract: The present disclosure discloses a hearing effect calibration method and apparatus for an earphone, an electronic device, and a computer readable storage medium. The method is applied to an adjustment terminal of the earphone and comprises: acquiring hearing thresholds of a first user and a second user; calculating a hearing acuity parameter of the first user relative to the second user based on the hearing thresholds; acquiring a first gain adjustment amount set by the first user who had adjusted a gain of the earphone according to his/her own auditory effect; determining a product of the first gain adjustment amount and the hearing acuity parameter as a second gain adjustment amount; and determining a final gain value of the earphone for the second user based on the second gain adjustment amount.

Abstract: The present application relates to a nonlinear optical crystal structure, a preparation method thereof and an optical device. The nonlinear optical crystal structure includes a plurality of material layers stacked in a direction perpendicular to a two-dimensional plane thereof. Each of the material layers has a crystal structure with y-fold rotational symmetry, and has a predetermined lattice direction parallel to the two-dimensional plane, where y is an integer in a range from 1 to 20. Adjacent material layers have a nonzero twist angle therebetween, and the twist angle is an angle between the predetermined lattice directions of the adjacent material layers.

Abstract: The present disclosure provides a method and device for intelligent control of heating furnace combustion based on a big data cloud platform, which relates to the technical field of artificial intelligence control. The method includes: construction of big data cloud platform based on production and operation parameters of the heating furnace; identification of key factors in the production process of the heating furnace by using big data mining technology; independent deployment of traditional heating furnace combustion control systems based on the mechanism model; and integration of cloud platform big data expert knowledge base and the heating furnace combustion intelligent control system.

Abstract: A liquid injection device comprises a vacuumizing air path, first-level and second-level cups, injection paths, and liquid flowing assemblies. The first-level cup is formed with a plurality of buffer cavities that are isolated from each other; the second-level cup is formed with a plurality of liquid injection cavities that are isolated from each other; the liquid injection cavities are all communicated with the vacuumizing air path; each injection path is communicated with one buffer cavity; the liquid flowing assemblies, the buffer cavities, and the liquid injection cavities are arranged in a one-to-one correspondence manner; each liquid flowing assembly comprises a liquid flowing channel and a first switch element; the liquid flowing channel is communicated with one buffer cavity and one liquid injection cavity; and the first switch element is arranged in the liquid flowing channel to selectively open or close the liquid flowing channel.

Abstract: The present invention provides a porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke and preparation method therefor and application thereof. The method includes the steps of preparing an in-situ activated precursor from a pre-treated high-sulfur petroleum coke, destabilizing bulk sulfur, conducting an in-situ metal-sulfur bonding reaction, and washing and drying, which achieve the high-value in-situ conversion of sulfur in high-sulfur petroleum coke, resulting in the preparation of a porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke. This catalyst is applied to catalyze magnesium-based hydrogen storage materials.

Abstract: The present invention provides a porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke and preparation method therefor and application thereof. The method includes the steps of preparing an in-situ activated precursor from a pre-treated high-sulfur petroleum coke, destabilizing bulk sulfur, conducting an in-situ metal-sulfur bonding reaction, and washing and drying, which achieve the high-value in-situ conversion of sulfur in high-sulfur petroleum coke, resulting in the preparation of a porous carbon catalyst loaded with metal sulfides based on high-sulfur petroleum coke. This catalyst is applied to catalyze magnesium-based hydrogen storage materials.

Abstract: This application provides a base station antenna and a base station system. The base station antenna includes a reflection panel, a dielectric body, a metal strip, a sliding dielectric, and an antenna element. The reflection panel is provided with a metal cavity, the metal cavity has an opening, and the opening faces a front side of the reflection panel. The metal strip is disposed on the dielectric body, one end of the metal strip is disposed in the metal cavity, and the other end of the metal strip extends out of the metal cavity. At least a part of the sliding dielectric is slidably disposed in the metal cavity. The antenna element is connected to the end of the metal strip that extends out of the metal cavity.

Abstract: Various implementations generate a preview of a three-dimensional (3D) representation of the object. For example, an example process may include obtaining a first frame of image data of an object in a physical environment. The process may further include generating first data including data identified based on the first frame specifying one or more features identified within a plurality of 3D volumes within a 3D area. The process may further include generating a 3D representation of the object based on the first data and features from a generic model. The process may further include presenting the 3D representation of the object, where presenting the 3D representation of the object occurs prior to obtaining a second frame of image data of the object and updating the 3D representation based on the second frame.

Abstract: A liquid injection device comprises a vacuumizing air path, first-level and second-level cups, injection paths, and liquid flowing assemblies. The first-level cup is formed with a plurality of buffer cavities that are isolated from each other; the second-level cup is formed with a plurality of liquid injection cavities that are isolated from each other; the liquid injection cavities are all communicated with the vacuumizing air path; each injection path is communicated with one buffer cavity; the liquid flowing assemblies, the buffer cavities, and the liquid injection cavities are arranged in a one-to-one correspondence manner; each liquid flowing assembly comprises a liquid flowing channel and a first switch element; the liquid flowing channel is communicated with one buffer cavity and one liquid injection cavity; and the first switch element is arranged in the liquid flowing channel to selectively open or close the liquid flowing channel.

Abstract: Methods, systems, and devices for improved implicit ordered command handling are described. For instance, a memory device may receive, from a host device, a first command and a second command. The memory device may determine whether a first memory operation associated with the first command and a second memory operation associated with the second command are to be performed in an order relative to each other based on a first time when the first command is received relative to a second time when the second command is received. The memory device may select whether to perform a first memory access procedure or a second memory access procedure based on whether the first memory operation and the second memory operation are a same type of memory operation and on whether the first memory operation and the second memory operation are to be performed in the order relative to each other.

Abstract: A method for preparing a lignin adhesive and a product thereof are provided. The method includes: treating a wood fiber raw material with a mixed solution; after the treatment, adding an organic solvent to perform a solid-liquid separation while stirring, subjecting an obtained liquid to a rotary evaporation to remove the organic solvent, and washing and drying the product to obtain the lignin adhesive. The method can remove a large amount of lignin from wood fiber raw materials at a low temperature, and in the process of lignin removal, the lignin adhesive is formed by the cross-linking reaction with the solvent in the system, realizing the separation of lignin and the formation of lignin adhesive simultaneously. And the method is simple, has low cost and high yield, and can realize the large-scale preparation of lignin adhesive and the efficient removal of lignin.

Abstract: Attention-free transformers are disclosed. Various implementations of attention-free transformers include a gating and pooling operation that allows the attention-free transformers to provide comparable or better results to those of a standard attention-based transformer, with improved efficiency and reduced computational complexity with respect to space and time.

Abstract: A method for preparing a lignin adhesive and a product thereof are provided. The method includes: treating a wood fiber raw material with a mixed solution; after the treatment, adding an organic solvent to perform a solid-liquid separation while stirring, subjecting an obtained liquid to a rotary evaporation to remove the organic solvent, and washing and drying the product to obtain the lignin adhesive. The method can remove a large amount of lignin from wood fiber raw materials at a low temperature, and in the process of lignin removal, the lignin adhesive is formed by the cross-linking reaction with the solvent in the system, realizing the separation of lignin and the formation of lignin adhesive simultaneously. And the method is simple, has low cost and high yield, and can realize the large-scale preparation of lignin adhesive and the efficient removal of lignin.

Abstract: The present disclosure discloses a method for predicting a channel based on an image processing and a machine learning, which belongs to the field of the channel prediction. The method introduces an image semantic segmentation technology to identify and segment a scatterer in a scenario image, extracts the effective position information of the scatterer, and identify a scenario in the segmented image. The subsequent feature extraction is performed in a similar scenario through the scenario identification, which facilitates extracting the more tiny environment features. The semantic segmentation images of the known scenarios are jointly input into a feature extraction and channel prediction network to complete the channel prediction.

Abstract: A novel scatterer density-based predictive channel modeling method includes: obtaining channel data with different scenarios scatterer densities through a channel measurement or a simulation; obtaining corresponding channel statistical characteristic parameters through a data preprocessing based on the channel data; constructing a graph dataset by taking scatterer density in different scenarios as main characteristics to enhance a space-time correlation of data; dividing the graph dataset according to a certain proportion, and then using a graph attention network and a gated recurrent unit network to extract correlated channel space-time characteristics and implementing a cross scenario channel prediction. The method can capture channel variations in different scenarios, and obtain channel characteristics under different scatterer densities through high space-time correlated channel characteristics, and has good performance in channel prediction based on scenario.

Abstract: The present invention relates to the technical field of optical analog computing, and specifically provides a planar micro-nano optical analog computing device. A planar micro-nano optical element includes a micro-nano structure. By adjusting a physical parameter of the micro-nano structure, the planar micro-nano optical element corresponds to different transfer functions at different resonance wavelengths, and a relationship curve between the transfer function and an incident wave vector at different resonance wavelengths is rectangle bandpass filtering functions with different bandwidths.

Abstract: A nonlinear optical crystal structure is provided. The nonlinear optical crystal structure includes a plurality of two-dimensional material films, wherein the plurality of two-dimensional material films are stacked in a direction perpendicular to a two-dimensional plane thereof, and two-dimensional material films adjacent to each other are bonded by van der Waals forces, each of the plurality of two-dimensional material films is a crystal with a center-inversion-asymmetric crystal structure, and has a predetermined lattice orientation parallel to the two-dimensional plane in a direction parallel to the two-dimensional plane, there is a non-zero twist angle between the two-dimensional material films adjacent to each other, and the twist angle is an included angle between predetermined lattice orientations of the two-dimensional material films adjacent to each other in the same two-dimensional plane, and a thickness of each of the plurality of two-dimensional material films is greater than 5 nm.