Abstract: A radiographic inspection device and a method of inspecting an object are provided. The radiographic inspection device includes a support frame, where an inspection space applicable to inspect an object is formed within the support frame, and the inspection space has a first opening connecting to an outside; a transfer mechanism applicable to carry the object and move through the inspection space; a shielding curtain mounted at the first opening; and a driving mechanism. The driving mechanism includes: a driver mounted on the support frame; and a joint portion, where an upper end of the shielding curtain is connected to the joint portion. The driver is configured to synchronously drive two ends of the joint portion, so that the shielding curtain moves up and down with the joint portion to open or close the first opening.

Abstract: A poor-QoE assessment method and a related device are provided. The method includes: obtaining m data streams transmitted by a network device; screening the m data streams, and determining that p data streams in the m data streams and that meet a first preset condition are data streams corresponding to a first type; performing feature extraction on the data streams corresponding to the first type, to obtain known feature vectors corresponding to the first type; training, by using the known feature vectors corresponding to the first type, an untrained first poor-QoE assessment model, to obtain a trained first poor-QoE assessment model; and performing, by using the trained first poor-QoE assessment model, poor-QoE assessment on n data streams corresponding to the first type, to obtain a first poor-QoE assessment result. This method can be universally used instead of an application.

Abstract: Embodiments of this application disclose a service type determining method and a related device. A first device obtains a dataset, where the dataset includes at least two 5-tuples. The first device determines a target feature (the target feature is used to indicate a service type corresponding to a target triplet) corresponding to the target triplet based on the dataset. In this way, the first device can identify the service type corresponding to the target triplet based on the target feature, to facilitate operations such as packet transmission traffic control or application identification based on the importance indicated by the service type.

Abstract: A method and an apparatus for predicting a fault of an optical circuit includes determining a classification threshold of an operating parameter based on a classification sample set corresponding to the operating parameter of optical circuit and predicting, based on comparison results between the classification threshold and a plurality of measured values in a sequence, whether a fault occurs in the future on the optical circuit corresponding to the sequence.

Abstract: Embodiments of this application disclose a service type determining method and a related device. A first device obtains a dataset, where the dataset includes at least two 5-tuples. The first device determines a target feature (the target feature is used to indicate a service type corresponding to a target triplet) corresponding to the target triplet based on the dataset. In this way, the first device can identify the service type corresponding to the target triplet based on the target feature, to facilitate operations such as packet transmission traffic control or application identification based on the importance indicated by the service type.

Abstract: A poor-QoE assessment method and a related device are provided. The method includes: obtaining m data streams transmitted by a network device; screening the m data streams, and determining that p data streams in the m data streams and that meet a first preset condition are data streams corresponding to a first type; performing feature extraction on the data streams corresponding to the first type, to obtain known feature vectors corresponding to the first type; training, by using the known feature vectors corresponding to the first type, an untrained first poor-QoE assessment model, to obtain a trained first poor-QoE assessment model; and performing, by using the trained first poor-QoE assessment model, poor-QoE assessment on n data streams corresponding to the first type, to obtain a first poor-QoE assessment result. This method can be universally used instead of an application.

Abstract: In a video quality assessment method, an assessment model is first generated based on a subjective assessment result of a user on each sample in a sample set and based on a parameter set (a parameter type in the parameter set may include at least one of a packet loss rate, a delay, and a jitter) of each sample. Therefore, when video quality is being assessed, a parameter set of a to-be-assessed video is obtained first, where the parameter set of the to-be-assessed video has a same parameter type as the parameter set of each sample that is used to generate the assessment model; and then video quality of the to-be-assessed video is assessed based on the assessment model and the parameter set of the to-be-assessed video, to obtain an assessment result.

Abstract: A method and an apparatus for predicting a fault of an optical circuit includes determining a classification threshold of an operating parameter based on a classification sample set corresponding to the operating parameter of optical circuit and predicting, based on comparison results between the classification threshold and a plurality of measured values in a sequence, whether a fault occurs in the future on the optical circuit corresponding to the sequence.

Abstract: Embodiments of this application disclose a method and an apparatus for generating an application identification model. The method includes: obtaining Y data packets, where the Y data packets correspond to P applications, an ith application in the P applications corresponds to M(i) data packets, and Y=?i=1PM(i), 1?i?P; extracting a target parameter of each of the M(i) data packets of each of the P applications to obtain M(i) samples, where the target parameter indicates information about a session connection established between the ith application and a server that provides the ith application; and training an initial identification model based on the M(i) samples of each of the P applications, to obtain a first application identification model, where the first application identification model is used to determine, based on a target parameter of a data packet, an application corresponding to the data packet.

Abstract: A method and an apparatus for predicting a fault of an optical circuit includes determining a classification threshold of an operating parameter based on a classification sample set corresponding to the operating parameter of optical circuit and predicting, based on comparison results between the classification threshold and a plurality of measured values in a sequence, whether a fault occurs in the future on the optical circuit corresponding to the sequence.

Abstract: A method and an apparatus for predicting a fault of an optical circuit includes determining a classification threshold of an operating parameter based on a classification sample set corresponding to the operating parameter of optical circuit and predicting, based on comparison results between the classification threshold and a plurality of measured values in a sequence, whether a fault occurs in the future on the optical circuit corresponding to the sequence.

Abstract: In a video quality assessment method, an assessment model is first generated based on a subjective assessment result of a user on each sample in a sample set and based on a parameter set (a parameter type in the parameter set may include at least one of a packet loss rate, a delay, and a jitter) of each sample. Therefore, when video quality is being assessed, a parameter set of a to-be-assessed video is obtained first, where the parameter set of the to-be-assessed video has a same parameter type as the parameter set of each sample that is used to generate the assessment model; and then video quality of the to-be-assessed video is assessed based on the assessment model and the parameter set of the to-be-assessed video, to obtain an assessment result.

Abstract: A solar automatic heat collecting and equalizing tube, including: a glass tube, an absorption tube, and a baffle. The glass tube is sleeved on the absorption tube. The absorption tube is coated with a heat absorption layer. The space between the glass tube and the absorption tube is vacuum. The baffle is disposed in the inner cavity of the absorption tube and is configured to drive a fluid in the absorption tube to tumble up and down alternately. The baffle is spiral in shape and fixed in the absorption tube.

Abstract: Solar and steam hybrid power generation system including a solar steam generator, an external steam regulator, a turboset, and a power generator. A steam outlet end of the solar steam generator is connected to a steam inlet of the turboset. A steam outlet end of the external steam regulator is connected to the steam inlet of the turboset. A steam outlet of the turboset is connected to the input end of a condenser, and the output end of the condenser is connected to the input end of a deaerator. The output end of the deaerator is connected to the input end of a water feed pump. The output end of the water feed pump is connected to a circulating water input end of the solar steam generator. The output end of the water feed pump is connected to a water-return bypass of the external steam.

Abstract: A photocatalytic reaction system by collecting sunlight, the system including: a light collector, a light conduction device, and a photoreactor. A transparent protective cover is disposed on the top of a housing of the light collector. A light-collecting convex lens group is disposed beneath the protective cover in the transmission direction of the sunlight. The housing of the light collector is provided with a solar radiation measuring device. An azimuthal main shaft and the pitch main shaft are separately provided with the servo motors and are rotatable in relation to each other by tracking the sunlight under the drive of the separate servo motors. The sunlight collected by the light-collecting convex lens group is converged into a convergent light when passing through the light conduction device and the convergent light is directed to the photoreactor. The photoreactor functions to transmit full-spectrum rays of sunlight.

Abstract: A thermal energy supply system, including: a solar concentrating device, a solar storage tank including a first heat exchanger and a second heat exchanger, a biomass power station including a biomass boiler, a central refrigeration and ice maker, and a central hot water supply tank. The solar concentrating device is connected to the solar storage tank. The inlet of the first heat exchanger of the solar storage tank is connected to the outlet of a feedwater pump of the biomass boiler. The outlet of the first heat exchanger is connected to the inlet of a water feeding system of the biomass boiler. The inlet pipe of the second heat exchanger of the solar storage tank is connected to the outlet pipe of a water purification plant. The outlet of the second heat exchanger is connected to a thermal energy input pipe of the central refrigeration and ice maker.

Abstract: A photocatalytic reaction system by collecting sunlight, the system including: a light collector, a light conduction device, and a photoreactor. A transparent protective cover is disposed on the top of a housing of the light collector. A light-collecting convex lens group is disposed beneath the protective cover in the transmission direction of the sunlight. The housing of the light collector is provided with a solar radiation measuring device. An azimuthal main shaft and the pitch main shaft are separately provided with the servo motors and are rotatable in relation to each other by tracking the sunlight under the drive of the separate servo motors. The sunlight collected by the light-collecting convex lens group is converged into a convergent light when passing through the light conduction device and the convergent light is directed to the photoreactor. The photoreactor functions to transmit full-spectrum rays of sunlight.

Abstract: A solar automatic heat collecting and equalizing tube, including: a glass tube, an absorption tube, and a baffle. The glass tube is sleeved on the absorption tube. The absorption tube is coated with a heat absorption layer. The space between the glass tube and the absorption tube is vacuum. The baffle is disposed in the inner cavity of the absorption tube and is configured to drive a fluid in the absorption tube to tumble up and down alternately. The baffle is spiral in shape and fixed in the absorption tube.

Abstract: An apparatus for desalinating seawater, including: a seawater purifying system and a seawater desalinating system. The seawater purifying system includes: a purified seawater transporting pump including a purified seawater output main pipe. The seawater desalinating system includes: a solar thermal apparatus for concentrating solar energy and collecting heat, a solar energy heat storage tank, a purified seawater heater, a heated seawater pump, at least one stage of seawater flash evaporator, a freshwater main pipe, a sealed fresh water storage tank, a vacuum pump, and a concentrated brine pump. The solar thermal apparatus includes a heat transfer medium chamber. The purified seawater heater includes: a first heat exchanger utilizing a heat transfer medium as a heat source, an inlet, a seawater outlet, and an inlet main pipe. Each stage of seawater flash evaporator includes a flash evaporator body and a seawater cooler.

Abstract: A dish-type Stirling solar generator capable of running continuously day and night, including a dish-type Stirling solar generating set. The dish-type Stirling solar generating set includes a combustor, a position adjustment mechanism, and a bracket. The combustor includes an opening. The position adjustment mechanism is capable of adjusting the opening of the combustor to align or deviate from a heat receiver of the dish-type Stirling solar generating set. The position adjustment mechanism is disposed on the bracket of the dish-type Stirling solar generating set. The combustor is disposed on the position adjustment mechanism. A fuel supply system of the combustor is connected to the combustor via a main switch valve, a branch switch valve, a regulating valve, and a flexible conveying pipe.