Abstract: This application provides an AI model switching or updating method. A change of a use environment (a moving speed of an inference network element, a channel environment, and the like) of an AI model can be learned of by monitoring an input or intermediate performance indicator of the AI model, for example, monitoring the input indicator of the AI model or monitoring the intermediate performance indicator of the AI model. In this way, whether the AI model needs to be switched or updated is determined based on correspondence information, to adapt to the change of the use environment of the AI model. This helps alleviate a problem that performance of the AI model decreases or deteriorates due to a great change of the use environment of the AI model.

Abstract: Provided is a method for preparing 7N tellurium, including the following steps: mixing 2N crude tellurium with concentrated sulfuric acid, and subjecting a resulting mixture to oxidation roasting to obtain a selenium dioxide vapor and a roasting residue; mixing the roasting residue with a strong base solution, and subjecting a resulting solution to electrolysis to obtain 4N electrolytic tellurium; subjecting the 4N electrolytic tellurium to vacuum distillation to obtain 5N tellurium; and melting the 5N tellurium to obtain a tellurium melt, immersing a crystallizer in the tellurium melt, and subjecting the tellurium melt to crystallization to obtain the 7N tellurium; wherein the method is performed for a total time of less than 14 days.

Abstract: Embodiments of this application provide a communication method and a communication apparatus. The method includes: A terminal device determines a first parameter value of a first parameter based on a measurement result of a first downlink reference signal and a first precoder, where the first parameter reflects downlink channel quality; and obtains a parameter value of a second parameter based on a first compensation amount and the first parameter value of the first parameter, and reports the parameter value of the second parameter, where the first compensation amount indicates a difference between downlink channel quality in a case in which a network device uses the first precoder and downlink channel quality in a case in which the network device uses a second precoder. In the solutions in embodiments of this application, the parameter value reported by the terminal device can accurately reflect actual downlink channel quality.

Abstract: A first network element (a training data collection network element) receives first information from a second network element (an AI model training network element), the first information being for determining validity of candidate training data collected by the first network element. The first network element collects candidate training data of an AI model, and determines the validity of the candidate training data based on the first information. When the candidate training data is valid, the first network element sends valid candidate training data to the second network element, but does not send invalid candidate training data. When there is no valid candidate training data, the first network element indicates, to the second network element, that the training data collected this time is invalid, and does not send the candidate training data collected this time to the second network element. Waste of air interface resources can be reduced.

Abstract: A method and a system for detecting railway foreign object intrusion, and a device and a medium can include acquiring a first key frame of railway image of a current scenario as a template image, and an Nth frame of railway image as a to-be-detected image; inputting the template image and the to-be-detected image of the current scenario into a foreign object intrusion prediction model to obtain a foreign object feature map of the current scenario, so as to determine whether there is a different target between the to-be-detected image and the template image of the current scenario; and filtering, by using a moving object filter model, a moving object from the different target of the to-be-detected image of the current scenario in response to existing different target, to obtain a true foreign object in the to-be-detected image of the current scenario.

Abstract: A system for optimizing signal to interference plus noise ratio (SINR) of a 5G New Radio (NR) network including multiple cell sites each having at least one sector, and at least one of the cell sites in communication with a user equipment (UE), the system includes: a radio resource controller (RRC) configured to control a combination synchronization signal and physical broadcast channel block (SSB) locations for all sectors of the cell sites; and a medium access control (MAC) scheduler configured to schedule SSB in each sector in at least one of frequency and time; wherein the RRC configures SSB indices for all sectors of the cell sites so that no two immediately adjacent sectors share the same SSB index.

Abstract: The present disclosure relates to the technical field of magnesium metallurgy, and in particular to a device and method for magnesium smelting by vacuum carbothermal reduction of calcined dolomite. The device includes a reaction chamber, a condensation chamber, a first temperature regulation module and an air pressure regulation module, and the reaction chamber is communicated with the condensation chamber via a gas-guide tube. In the present disclosure, different condensation zones are utilized to sequentially condense gaseous products based on dew points, effectively preventing impurities from entering the condensation process of magnesium.

Abstract: Provided is a method for preparing high-purity indium (In). The method for preparing the high-purity In includes: distilling refined In to obtain an In vapor-containing gas; and condensing the In vapor-containing gas to obtain the high-purity In; where the distilling is conducted at a temperature of 1,000° C. to 1,100° C. under a vacuum degree of 1.0×10?3 Pa to 5.0×10?2 Pa; and the condensing is conducted at a temperature of 700° C. to 900° C. under a vacuum degree of 1.0×10?3 Pa to 5.0×10?2 Pa. The In vapor-containing gas is obtained by controlling the temperature and vacuum degree of the distilling to evaporate In and impurities with a vapor pressure higher than the In. The temperature and vacuum degree of the condensing are adjusted to condense the In in the In vapor-containing gas.

Abstract: A hard disk, a fixing device, and a hard disk module are provided. The hard disk includes a base shell, a main circuit board mounted on the base shell, a switch mounted on the main circuit board, and a triggering mechanism. The triggering mechanism includes a triggering rod. The triggering rod is slidably arranged on the base shell along a first direction.

Abstract: The present invention discloses a method for controlling a multi-robot collaborating intelligent drilling and riveting system for a shelter, including the following steps: generating a robot scanning trace according to a key characteristic parameter of the shelter; performing laser scanning on an angle aluminum edge to acquire a drilling position of the shelter; establishing a task allocation mechanism, establishing a drilling and riveting task propensity model according to the task allocation mechanism, and allocating automatic drilling and riveting tasks to multiple robots based on the drilling and riveting task propensity model; and establishing a drilling angle compensation value model, where automatic drilling and riveting robots perform position compensation based on the drilling angle compensation value model to complete drilling and riveting.

Abstract: The present disclosure relates to a device and method for recovering arsenic and gallium. A closed furnace body is in communication with a vacuuming pipe, and the vacuuming pipe is connected to a vacuuming mechanism. The closed furnace body includes a first furnace body, a second furnace body and a third furnace body. A first heating mechanism and a graphite crucible are arranged inside the first furnace body, the first heating mechanism being used for heating the graphite crucible. A first collection cylinder is in communication with a second collection cylinder. The device for recovering arsenic and gallium of the present disclosure is arranged with a structure for realizing directional condensation of gallium arsenide clusters and arsenic vapor, respectively, to realize high-purity recovery of arsenic and gallium.

Abstract: Disclosed is a method for removing impurity mercury from crude selenium. The method includes: mixing a vulcanizing agent with a crude selenium slag that is crushed to not more than 200 mesh uniformly, and performing briquetting to obtain a mixed material; adding the mixed material into a sealed furnace, and subjecting the mixed material to vulcanization by heating under an inert atmosphere to obtain a vulcanized selenium; subjecting the vulcanized selenium to primary vacuum distillation, such that selenium is converted into a gas phase and collected in a form of a volatile, and generated mercury sulfide and valuable elements are enriched in a resulting residue; and subjecting the selenium to secondary distillation to further remove mercury.

Abstract: Provided are a vacuum distillation furnace, and a method for preparing high-purity copper particles. In view of the fact that high-purity copper prepared by the traditional method in the current industrial production has an unsatisfactory purity, a high impurity content, and a complicated composition, a vacuum distillation method is adopted. During the vacuum distillation method, most of valuable metals in a copper matrix are volatilized and enter into a gas phase, such that the metals are separated from the copper matrix, thereby allowing the purification of copper; and copper powder particles volatilized to a condensation plate have a smooth surface and a purity of 5 N grade or more.

Abstract: Disclosed are systems and methods for responding to unsupported or degraded conditions for autonomous vehicles (AVs). In some aspects, a method includes aggregating one or more trigger events generated across a software stack of an autonomous vehicle (AV) as aggregated trigger events, the one or more trigger events indicating at least one of unsupported or degraded conditions that bring the AV outside of allowable driving conditions of the AV, ranking the aggregated trigger events in accordance with priority levels corresponding to the aggregated trigger events, determining an AV maneuver to respond to a selected trigger event, wherein the selected trigger event is a highest ranked trigger event of the aggregated trigger events, causing the AV maneuver to be performed by the AV, and determining whether to at least one of fail the AV or recover the AV to a normal driving state in response to the selected trigger event.

Abstract: This invention presents an electrochemical metallurgical technique for extracting metals and sulfur from metal sulfides, offering an adjustable composition and mechanical properties during electrode preparation. The metal sulfide anode, submerged in an electrolyte with a cathode made of materials like titanium, copper, stainless steel, lead, zinc, aluminum or graphite, undergoes electrolysis. This process oxidizes sulfur in the metal sulfide to the anode and releases metal ions into the electrolyte, where they're reduced at the cathode. The method yields metal at the cathode and sulfur at the anode, with minimal environmental impact, low investment, and straightforward process.

Abstract: An optical-fiber Raman photometer.

Abstract: Provided is a recovery method for valuable metals in copper anode slime. By using the recovery method of the disclosure, selenium, copper, tellurium, arsenic, lead, bismuth, and precious metals gold and silver in the copper anode slime are recovered. The method adopts two-step vacuum carbothermal reduction to replace reduction smelting of anode slime and stepwise blowing of noble lead in the traditional pyrometallurgy, and avoids the emission of arsenic-containing soot in the traditional process. The recovered gold-rich residue contains almost no base metals such as lead, bismuth, antimony, and arsenic. After subjecting the gold-rich residue to leaching gold by chlorination and reduction, a gold powder could be obtained therefrom with a lower content of base metals than traditional processes. Therefore, the method greatly reduces the amount of produced slag, shortens the production cycle, and reduces the loss of precious metals in the slag.

Abstract: The present invention relates to the technical field of organic compound synthesis, and particularly to a method for synthesizing silver (I) trifluoromethanethiolate. A method for synthesizing silver (I) trifluoromethanethiolate (CAS number: 811-68-7) is provided, which comprising synthesizing silver (I) trifluoromethanethiolate by using silver fluoride as a raw material, and using a trifluoromethanethiolate as a source providing trifluoromethylthio groups. In the present invention, the trifluoromethanethiolate is used as a source providing trifluoromethylthio groups, reacts with silver fluoride in a solvent to produce silver (I) trifluoromethanethiolate; and after separation and purification, a finished product of silver (I) trifluoromethanethiolate is obtained.

Abstract: An apparatus and method for preparing high-purity spherical magnesium and/or high-purity magnesium powder are provided. The apparatus includes a vertical furnace body, a heating zone, and a condensing zone, where a periphery of the condensing zone is provided with a first thermal insulation device and a second thermal insulation device sequentially from bottom to top, and each of the first thermal insulation device and the second thermal insulation device is removably arranged; the periphery of the condensing zone is further provided with a liquid cooling device; a gas inlet and a gas outlet are formed in the condensing zone; and an inner wall of the condensing zone is provided with an arrangement structure configured to arrange a collection device. A heating temperature of a material and condensation conditions in the condensing zone are controlled to make an evaporated magnesium vapor condensed on the collection device in the condensing zone.

Abstract: The present disclosure provides a technical solution related to intelligent knowledge learning and question-answering. The technical solution involves extracting knowledge from corpus and providing a user with a question-answering service based on the extracted knowledge.