Abstract: Disclosed a heat shield and a monocrystalline silicon growth furnace using the same. The heat shield is arranged in an upper portion of a melt crucible in the monocrystalline silicon growth furnace, and comprises a shield wall and a shield bottom provided with a window for pulling melt through. The shield bottom comprises a top layer, a bottom layer and a side wall. The side wall is connected between the top and bottom layers and encloses the window. The bottom layer faces towards a liquid level of the melt, and is designed as a serrated structure. With the serrated structure of the bottom layer of the shield bottom, the external thermal energy can be prevented from being absorbed by the monocrystalline silicon crystal, thereby avoiding excessive thermal compensation on a crystal surface, effectively optimizing longitudinal temperature gradient of the crystal, and improving the radial quality uniformity of a silicon wafer.

Abstract: Disclosed is a thin-film heat insulation sheet for a monocrystalline silicon growth furnace, which comprises one or more first refractive layers and one or more second refractive layers which have different refractivity and are laminated alternately to form a laminated structure. Also disclosed is a monocrystalline silicon growth furnace, in which the thin-film heat insulation sheet is arranged on a heat shield. The thin-film heat insulation sheet has good reflectivity in wavelength ranges of heat radiation. When disposed on a heat shield to be applied to the monocrystalline silicon growth furnace, the thin-film heat insulation sheet not only can improve ability of the heat shield to reflect heat energy, reduce heat dissipation of molten silicon melt, and improve heat energy utilization, but also is conducive to heat insulation performance of the heat field, thereby improving the quality of the heat field to improve the quality and yield of monocrystalline silicon.

Abstract: Disclosed are a heat shield device for insulating heat and a smelting furnace. The heat shield device comprises a heat shield unit and a heat insulation unit. The heat shield unit comprises a shield bottom provided with a through hole, and a shield wall disposed on a side of the shield bottom opposite to the through hole. The heat insulation unit comprises a heat insulation part disposed above a layer plate of the shield bottom close to a liquid level of a crucible and a heat preservation part. The smelting furnace used for growth of monocrystalline silicon comprises the heat shield device, a crucible and a heater. The heat shield device of the present invention can increase a temperature gradient between the heat shield unit and the crucible, thereby facilitating rapid formation of silicon crystal bar and improving production efficiency of the silicon crystal bar.

Abstract: Disclosed a heat shield device for a single crystal production furnace. The heat shield device is disposed above a melt crucible of the single crystal production furnace, and comprises a shell, supporting members, heat insulation plates and a direction control component. The supporting members and the heat insulation plates are disposed within of the shell. One end of the supporting member is fixedly connected with an inner wall of the shell. The direction control component is connected with the heat insulation plate. The supporting members serve as supporting points of the heat insulation plates, and cooperate with the direction control component to control rotation of the heat insulation plates relative to the shell. A rotatable angle of the heat insulation plate faces a cylindrical surface of monocrystalline silicon, and a bottom surface of the shell faces interior of the melt crucible.

Abstract: Disclosed a heat shield structure for a single crystal production furnace, which is provided above a melt crucible of a single crystal production furnace and comprises an outer housing and a heat insulation plate disposed within the outer housing. A bottom outer surface of the outer housing faces an interior of the melt crucible, and an angle formed between a plane in which the heat insulation plate is located and a plane in which a bottom of the outer housing is located is an acute angle and faces an outer surface of single crystal silicon. The heat shield design is changed, a heat absorbing plate is additionally provided for transferring heat absorbed to the single crystal silicon, a heat channel is formed in the heat shield, so that a pulling rate is controlled, which improves radial mass uniformity of the single crystal silicon.

Abstract: Disclosed are a heat shield device and a smelting furnace. The heat shield device comprises a heat shield unit and a heat insulation unit. The heat shield unit comprises a shield bottom provided with a through hole, and a shield wall comprising a first layer plate, a second layer plate and a lateral plate. One side of the lateral plate, the first layer plate and the second layer plate enclose the through hole; and the other side of the lateral plate, the first layer plate, the second layer plate and the shield wall enclose an accommodation cavity. The heat insulation unit comprises a heat insulation part disposed at the other side of the lateral plate and a heat preservation part. The heat shield device of the present invention can increase a temperature gradient, thereby facilitating rapid formation of silicon crystal bar and improving production efficiency of the silicon crystal bar.

Abstract: Disclosed is a composite heat insulation structure for a monocrystalline silicon growth furnace, comprising a supporting layer and a laminated structure on the supporting layer. The laminated structure comprises one or more first refractive layers and one or more second refractive layers which have different refractivity and are disposed alternately. Also disclosed is a monocrystalline silicon growth furnace in which the composite heat insulation structure is disposed on a heat shield. When disposed on a heat shield to be applied to the monocrystalline silicon growth furnace, the composite heat insulation structure can improve ability of the heat shield to reflect heat energy, reduce heat dissipation of silicon melt, and play a role of heat insulation on a heat field, thereby improving the quality of the heat field to improve the quality and yield of monocrystalline silicon.

Abstract: The present invention relates to an indoor monocular navigation method based on cross-sensor transfer learning and a system thereof. Determining an preliminary autonomous navigation model according to simulated laser radar data; acquiring actual single-line laser radar data and monocular camera data of the mobile robot simultaneously in an actual environment; determining the heading angle of the mobile robot according to the actual laser radar data; determining a laser radar monocular vision navigation model, according to the generated heading angle of the mobile robot and the monocular camera data at a the same moment and by using a Resnet18 network and a pre-trained YOLO v3 network; determining a heading angle of the mobile robot at the current moment, according to the acquired monocular camera data and by using the laser radar monocular vision navigation model; performing navigation of the mobile robot.

Abstract: Automated Index Management entails automated monitoring of query workload in a DBMS to determine a set of higher load queries to use to evaluate new potential indexes. Without the need of user approval or action, the potential indexes are automatically created, evaluated and tested, and then made available for system wide use for executing queries issued by end users. Indexes created by Automated Index Management are referred to herein as auto indexes.

Abstract: The present disclosure discloses a method and a system for generating a composite PET-CT image based on a non-attenuation-corrected PET image. The method includes: constructing a first generative adversarial network and a second generative adversarial network; obtaining a mapping relationship between a non-attenuation-corrected PET image and an attenuation-corrected PET image by training the first generative adversarial network; obtaining a mapping relationship between the attenuation-corrected PET image and a CT image by training the second generative adversarial network; and generating the composite PET-CT image by utilizing the obtained mapping relationships. According to the present disclosure, a high-quality PET-CT image can be directly composited from a non-attenuation-corrected PET image, and medical costs can be reduced for patients, and radiation doses applied to the patients in examination processes can be minimized.

Abstract: Systems and methods for a predicting power usage effectiveness (PUE) of a computer room with an optimized parameter using a Deep Concept Aggregation Neural Network (DCANN) algorithm based on hierarchical concept include receiving input feature parameters of a plurality of components associated with a computer room, and predicting the PUE of the computer room using a trained neural network, which comprises a hierarchical concept layer having embedded domain knowledge of the plurality of components placed between an input layer and a hidden layer.

Abstract: Automated Index Management entails automated monitoring of query workload in a DBMS to determine a set of higher load queries to use to evaluate new potential indexes. Without the need of user approval or action, the potential indexes are automatically created, evaluated and tested, and then made available for system wide use for executing queries issued by end users. Indexes created by Automated Index Management are referred to herein as auto indexes.

Abstract: An information content viewing method includes displaying, by a terminal, a first lock screen or keeps in a screen-off state, and displaying, by the terminal, a second lock screen after receiving first information, where the second lock screen displays a first control, and the first control prompts that content of the first information is hidden, receiving, by the terminal, a first operation of a user on a touchscreen, and collecting and verifying, by the terminal, fingerprint information of the user based on the first operation and displaying, by the terminal, a third lock screen after the verification on the fingerprint information succeeds, where the third lock screen displays the first control, and the first control displays the content of the first information.

Abstract: The disclosure provides a low-dose image reconstruction method and system based on prior anatomical structure difference.

Abstract: A terminal displays a home screen. The terminal is locked after receiving an operation of locking the terminal from a user. The terminal lights up the screen and displays a first lock screen interface when the terminal is in a lock screen state and when the terminal receives an operation of lighting up a screen from the user. The terminal captures fingerprint information of the user using a fingerprint recognizer when the terminal is in the lock screen state and when the terminal receives a third operation from the user on a touchscreen. The terminal displays a second lock screen interface different from the first lock screen interface after fingerprint authentication succeeds. The terminal displays the home screen when the terminal receives a fourth operation on the second lock screen interface.

Abstract: A vibration alerting mobile terminal configured to adjust an amplitude parameter and a frequency parameter of a vibration alerting mode, to implement diverse vibration alerting modes to meet vibration requirements of the mobile terminal in different environments. The terminal provides for: displaying a first interface, wherein the first interface includes an amplitude adjustment control, a frequency adjustment control, and a vibration mode adjustment control; responding to an adjustment operation for at least one of the amplitude adjustment control, the frequency adjustment control, and the vibration mode adjustment control; generating a first vibration alerting mode; and alerting a user according to the first vibration alerting mode.

Abstract: This application provides a method for obtaining a virtual reality (VR) resource by a terminal and a terminal, and relates to the field of communications technologies, so that the terminal can quickly and conveniently find a VR resource required by a user, to improve user experience. The method specifically includes, when a terminal detects an operation of choosing, by a user, to search for a VR resource related to a specific picture, automatically obtaining, by the terminal, feature information of the specific picture, and generating a request based on the feature information, sending, by the terminal, the request to a VR server, and then receiving, by the terminal, a list of related VR resources found by the VR server through matching based on the request.

Abstract: A vibration alerting mobile terminal configured to adjust an amplitude parameter and a frequency parameter of a vibration alerting mode, to implement diverse vibration alerting modes to meet vibration requirements of the mobile terminal in different environments. The terminal provides for displaying a first interface, wherein the first interface includes an amplitude adjustment control, a frequency adjustment control, and a vibration mode adjustment control; responding to an adjustment operation for at least one of the amplitude adjustment control, the frequency adjustment control, and the vibration mode adjustment control generating a first vibration alerting mode; and alerting a user according to the first vibration alerting mode.

Abstract: Systems, methods, and media for measuring the effectiveness and efficiency of database query optimizers are provided. In some embodiments, a system is provided, comprising: memory storing instructions that, when executed, cause a processor to: submit a first database query; receive a runtime to execute the first database query using a plan selected by a query optimizer; receive runtimes to execute the first database query using a plurality of test plans; determine, based on the runtimes, a metric indicative of the effectiveness of the query optimizer; and cause the metric indicative of the effectiveness of the query optimizer to be presented to a user.

Abstract: Automated Index Management entails automated monitoring of query workload in a DBMS to determine a set of higher load queries to use to evaluate new potential indexes. Without the need of user approval or action, the potential indexes are automatically created, evaluated and tested, and then made available for system wide use for executing queries issued by end users. Indexes created by Automated Index Management are referred to herein as auto indexes.