Abstract: A carrier and a preparation method therefor, a catalyst and a preparation method therefor and a use thereof, and a catalytic diesel oil hydroconversion method using a fluidized bed are disclosed. The carrier is spherical and has a core-shell structure. The carrier uses a molecular sieve as a core layer and aluminum oxide as a shell layer. Based on the weight of the carrier, the content of aluminum oxide is 30%-70%, preferably 30%-65%, and the content of the molecular sieve is 30%-70%, preferably 35%-70%; and the diameter of carrier particles is 0.5-3 mm, preferably 0.8-2 mm. A catalyst prepared by using the carrier has high activity and stability, so that catalytic diesel oil hydroconversion can be carried out to produce a gasoline high-octane blending component or BTX.

Abstract: Embodiments of the present disclosure provide a solar cell and a solar cell module. The solar cell includes a first region and a second region, and further includes a substrate having a first surface and a second surface; a tunneling layer covering the second surface; a first emitter formed on part of the tunneling layer in the first region; and a second emitter formed on part of the tunneling layer in the second region and on the first emitter, a conductivity type of the second emitter being different from a conductivity type of the first emitter. The solar cell further includes a first electrode configured to electrically connect with the first emitter by penetrating through the second emitter; and a second electrode formed in the second region and configured to electrically connect with the second emitter.

Abstract: A method and apparatus for computer operation improvement by flattening multi-level data structures to optimize pointer chase is provided. Within computer program code, one or more chains of multiple pointers which ultimately reference stored information to be processed are identified. These chains are analyzed to determine the feasibility of replacing the chains with a flatter data structure. In the flatter data structure, the stored information is accessible more directly. For example the data may be stored in a single array by which it can be accessed directly. When feasible, a chain is replaced with such a data structure and the computer program code is adjusted to implement the improved data structure in place of the associated chain. Candidate chains can be identified or prioritized for example on the basis of the expected impact to computer performance, e.g. in terms of operating speed or resource usage.

Abstract: Disclosed are a soft start method, device, and system of a hybrid distribution transformer (HDT) based on unbypassing its voltage-compensating converter, which belong to the technical field of transformer control. According to the method, through a grid-side current controller, a DC-link voltage controller, a split-capacitor voltage balance controller, and a load voltage controller, a start process of the HDT is divided into an uncontrolled rectification stage and a PWM rectification stage. According to the present disclosure, an anti-parallel thyristor of the voltage-compensating converter is closed without a bypass in a process of energization. A DC-link capacitor is charged by respective converters of two transformers of the HDT simultaneously, and thus an energization flow is simpler. In addition, an inrush current at an initial phase of the PWM rectification stage can be effectively mitigated by improving an existing steady-state control strategy.

Abstract: Embodiments of the present disclosure provide a solar cell and a solar cell module. The solar cell includes a first region and a second region, and further includes a substrate having a first surface and a second surface; a tunneling layer covering the second surface; a first emitter formed on part of the tunneling layer in the first region; and a second emitter formed on part of the tunneling layer in the second region and on the first emitter, a conductivity type of the second emitter being different from a conductivity type of the first emitter. The solar cell further includes a first electrode configured to electrically connect with the first emitter by penetrating through the second emitter; and a second electrode formed in the second region and configured to electrically connect with the second emitter.

Abstract: Embodiments of the present disclosure provide a solar cell and a solar cell module. The solar cell includes a first region and a second region, and further includes a substrate having a first surface and a second surface; a tunneling layer covering the second surface; a first emitter formed on part of the tunneling layer in the first region; and a second emitter formed on part of the tunneling layer in the second region and on the first emitter, a conductivity type of the second emitter being different from a conductivity type of the first emitter. The solar cell further includes a first electrode configured to electrically connect with the first emitter by penetrating through the second emitter; and a second electrode formed in the second region and configured to electrically connect with the second emitter.

Abstract: A solar cell and a photovoltaic module are provided. The solar cell includes an N-type substrate having a front surface and a rear surface, a passivation stack disposed on the front surface, and a tunneling oxide layer and a doped conductive layer disposed on the rear surface. The passivation stack includes an oxygen-containing dielectric layer including a metal oxide material, a first passivation layer including an oxygen-containing silicon nitride material, and a second passivation layer including a silicon oxynitride material. A thickness of the oxygen-containing dielectric layer is in a range of 1 nm to 15 nm in a direction perpendicular to the front surface, a thickness of the first passivation layer is in a range of 30 nm to 60 nm in the direction perpendicular to the front surface, and a thickness of the second passivation layer is in a range of 20 nm to 40 nm in the direction perpendicular to the front surface.

Abstract: Disclosed herein are methods for regulating an immune response using selective activation of neurons in the caudal nucleus of the solitary tract.

Abstract: A method for predicting and screening symbiotic interactions between Lactobacillus bulgaricus and Streptococcus thermophilus is provided, belonging to the technical field of fermented milk production. In the method, a comprehensive feature vector is generated by combining KEGG features and k-mer feature frequencies of Lactobacillus bulgaricus and Streptococcus thermophilus strains. The top 200 important features are screened from the real labeled samples using the chi-square test, gradient boosting, and variance analysis. Subsequently, pseudo-labeled samples are generated using GAN, and a machine learning model is constructed by combining the real labeled samples, which is configured to predict the interaction effects of strain combinations. Finally, the accuracy of the model predictions is verified through fermentation experiments, and the optimal model is selected.

Abstract: An optical communication system includes an optical communication board, a cage disposed on the optical communication board, an optical module disposed in the cage in pluggable manner, a connector disposed on the optical communication board, and a shield disposed on the connector. The connector includes a plurality of pins electrically connected with an electrical port of the optical module. At least two of the pins are spatially separated from each other by the shield.

Abstract: A signal connector comprises: a first part, having at least one electrical contact part, and a first body configured to be electrically insulating; a second part, having at least one electrical pin, and a second body configured to be electrically insulating and separate from the first body, and the electrical pin is configured to protrude from the second body; and an electrical connection body, extending from each electrical contact part to each electrical pin, in order to establish an electrical connection between the electrical contact part and the electrical pin, wherein the electrical connection body is configured to be deformable and comprises at least two bending parts, and at least part of the electrical connection body is located outside the first part and the second part, such that the position of the second part relative to the first part is variable.

Abstract: A photovoltaic module including a laminated assembly and a frame is provided. The frame includes a clamping frame sleeved on an edge of the laminated assembly. The clamping frame includes a first clamping portion disposed on a side of the laminated assembly away from sunlight. The first clamping portion includes a first surface and a second surface. Along a thickness direction of the laminated assembly, the first surface and the second surface are both disposed on a side of the first clamping portion towards the laminated assembly. An inclined angle ?i of the first surface is less than an inclined angle ?2 of the second surface.

Abstract: Disclosed herein are methods for regulating an immune response using selective activation of neurons in the caudal nucleus of the solitary tract.

Abstract: Disclosed are a solar cell and a photovoltaic module. In the solar cell, first and second conductive doped portions are arranged in an edge region of a first surface of a substrate. Each first conductive doped portion includes a first doped portion and second doped portions disposed on two opposite sides of the first doped portion, and a dopant concentration of the first doped portion is greater than that of the second doped portions. A passivation layer is disposed on the first surface. The second edge fingers are disposed on the second conductive doped portions respectively. Each first edge finger includes a first sub-finger and a second sub-finger, disposed on the second doped portions respectively. The second sub-finger is connected to the first sub-finger via the first doped portion. An edge busbar disposed on the passivation layer and on the first doped portion is connected to the second edge fingers.

Abstract: A pseudo-boehmite has a dry basis content of 55-85 wt % and contains a phosphoric acid ester group. The sodium oxide content is not greater than 0.5 wt %, and the phosphorus content (in terms of phosphorus pentoxide) is 1.2-5.7 wt %, relative to 100 wt % of the total weight of the pseudo-boehmite. The pseudo-boehmite has a low sodium content.

Abstract: Disclosed herein are methods for regulating an immune response using selective activation of neurons in the caudal nucleus of the solitary tract.

Abstract: An optical transmission device includes a laser configured to generate an initial optical signal, radio-frequency signal channels configured to transmit radio-frequency modulation signal, a ground channel disposed in parallel with and connected to the radio-frequency signal channels, an input optical fiber receiving the initial optical signal, a front-end optical splitting element splitting the initial optical signal, and optical transmission units. Each optical transmission unit includes a rear-end optical splitting element connected to the front-end optical splitting element, two optical splitting paths, an optical combining element, and an output optical fiber configured to output the optical modulation signal.

Abstract: A silica-alumina material, its preparation and application thereof are provided. The silica-alumina material has a SiO2/Al2O3 molar ratio of 0.8-1.5, and has a lamellar structure with an average length of 0.5-2 ?m and an average thickness of 30-80 nm, and its calcined form has a specific XRD pattern. The silica-alumina material has the characteristics of large pore volume, two-stage gradient pore channels of mesopores and macropores, as well as high B acid content as in molecular sieve, and shows crystal characteristics of a molecular sieve, and low impurity content, and thus is suitable for use as a carrier for catalytic materials, particularly a carrier for heavy oil hydrogenation catalysts.

Abstract: An optical transmission device comprises a lithium niobate modulator and a laser. The lithium niobate modulator includes an input optical fiber configured to receive the initial optical signal, an optical splitting element configured to split the initial optical signal to generate two optical splitting signals, two optical splitting paths configured to transmit the two optical splitting signals, a radio-frequency signal channel disposed in parallel between the two optical splitting paths and configured to transmit a radio-frequency modulation signal, a ground channel disposed in parallel with and connected to the radio-frequency signal channel, an optical combining element configured to combine the two optical splitting signals to generate an optical modulation signal, and a output optical fiber configured to output the optical modulation signal.

Abstract: A solar cell and a photovoltaic module are provided. The solar cell includes a substrate and a passivation layer formed over the substrate; finger electrodes arranged in the first direction and each extending in a second direction, where the finger electrodes include rows of first finger electrodes and rows of second finger electrodes alternatingly arranged in the first direction, and each row of first finger electrodes is between two adjacent rows of second finger electrodes, and where the finger electrodes penetrate the passivation layer to be electrically connected with the substrate; main busbars arranged in the second direction and formed over the passivation layer; and at least one edge electrode extending in the second direction.