Abstract: The present disclosure provides a method and system for optimizing first-diffraction-order reconstruction of holograms, a device and a medium, and relates to the field of image processing. The method includes: acquiring a target image; determining a target image light field according to the target image; calculating a target diffraction field for the target image light field by performing backward propagation by a set distance; constructing a U-Net network model; and inputting the target diffraction field into a trained U-Net network model to acquire an optimized hologram. The trained U-Net network model is obtained by constructing a U-Net network model and training and optimizing the U-Net network model, thereby continuously improving the quality of the zero-diffraction-order reconstructed image of the initial hologram and finally achieving the effect of optimizing the first-diffraction-order reconstructed image of the hologram.

Abstract: The present disclosure describes techniques of performing machine unlearning in a recommendation model. An unlearning process of the recommendation model may be initiated in response to receiving a request for deleting a fraction of user data from any particular user. The recommendation model may be pre-trained to recommend content to users based at least in part on user data. Values of entries in a matrix corresponding to the fraction of user data may be configured as zero. The matrix may comprise entries denoting preferences of users with respect to content items. Confidence values associated with the fraction of user data may be configured as zero to block influence of the fraction of user data on performance of the recommendation model. The unlearning process may be implemented by performing a number of iterations until the recommendation model has converged.

Abstract: Provided are a display unit and a display apparatus, the display unit includes a back plate and a print circuit board disposed on the back plate, wherein the print circuit board is connected to the back plate through a screw, and is provided with a first electrostatic discharge region and a first electrostatic discharge unit; the first electrostatic discharge region is connected to the back plate through the screw to form a first electrostatic discharge channel, and the first electrostatic discharge unit is connected to the back plate to form a second electrostatic discharge channel.

Abstract: The present disclosure provides a light guide plate, including a light-entering surface, a light-exiting surface adjacent to the light-entering surface, and a bottom surface arranged opposite to the light-exiting surface. The light guide plate includes a central region corresponding to an active display region of a display panel and a peripheral region corresponding a non-display region of the display panel in a first direction, the peripheral region includes a first peripheral region at a side adjacent to the light-entering surface, at least the first peripheral region of the peripheral region has a thickness smaller than the central region in a second direction, the first direction is a direction in which light is propagated inside the light guide plate, and the second direction is a direction in which the light exits the light guide plate. The present disclosure further provides a backlight module and a display device.

Abstract: Provided are a display unit and a display apparatus, the display unit includes a back plate and a print circuit board disposed on the back plate, wherein the print circuit board is connected to the back plate through a screw, and is provided with a first electrostatic discharge region and a first electrostatic discharge unit; the first electrostatic discharge region is connected to the back plate through the screw to form a first electrostatic discharge channel, and the first electrostatic discharge unit is connected to the back plate to form a second electrostatic discharge channel.

Abstract: The invention relates to a motor vehicle door lock with a locking mechanism comprising a rotary latch and a pawl, a trigger lever which acts on the pawl, a blocking lever which acts on the trigger lever, a first actuating lever which acts on the trigger lever and which acts on the blocking lever via a first leg spring, and a second actuating lever which acts on the trigger lever and which acts on the blocking lever via a second leg spring.

Abstract: The disclosure is directed to security management in communications involving computing devices, e.g. Internet of Things (IoT) devices. An IoT device can perform various activities, e.g., social networking activities, for or on behalf of a user. An IoT device is typically insecure, especially when accessing user data. To control the type of activities that can be performed by various types of devices, a server device (“server”) can issue different types of tokens to different IoT devices. Which token an IoT device has determines the types of activities the IoT device can perform. For example, the server can issue a restricted token, which restricts the type of activities an IoT device can perform, and an unrestricted token to a more secure device, e.g., a smartphone, that can perform a broader range of activities. For example, the restrictive token may not permit the IoT device to change the password of a user.

Abstract: The disclosure is directed to security management in communications involving computing devices, e.g. Internet of Things (IoT) devices. An IoT device can perform various activities, e.g., social networking activities, for or on behalf of a user. An IoT device is typically insecure, especially when accessing user data. To control the type of activities that can be performed by various types of devices, a server device (“server”) can issue different types of tokens to different IoT devices. Which token an IoT device has determines the types of activities the IoT device can perform. For example, the server can issue a restricted token, which restricts the type of activities an IoT device can perform, and an unrestricted token to a more secure device, e.g., a smartphone, that can perform a broader range of activities. For example, the restrictive token may not permit the IoT device to change the password of a user.

Abstract: The invention relates to a motor vehicle door lock with a locking mechanism comprising a rotary latch and a pawl, a trigger lever which acts on the pawl, a blocking lever which acts on the trigger lever, a first actuating lever which acts on the trigger lever and which acts on the blocking lever via a first leg spring, and a second actuating lever which acts on the trigger lever and which acts on the blocking lever via a second leg spring.

Abstract: An exhaust system (16) of a diesel engine (10) has a diesel particulate filter (18) for treating exhaust gas. When trapped soot has accumulated to an extent that may affect performance of the filter, an engine control system (12) forces combustion of trapped soot by increasing exhaust back-pressure using a control device (20) such as a back-pressure control valve or vanes of a variable geometry turbocharger.

Abstract: A display for multiple user spaces and corresponding activity levels is disclosed. For example, one embodiment comprises displaying a first user space including a first status representation in a user interface, displaying a second user space including a second status representation in the user interface, and changing the first status representation or the second status representation based on a change in status for the first user space or the second user space.

Abstract: Systems, methods, and devices for accessing portal services via a mobile communication device are provided. The mobile communication device may execute a menu program having a graphical user interface. The graphical user interface may include a service menu screen including a plurality of service selectors, each service selector having a respective service icon positioned within a boundary, the service icon graphically representing a service of a communications portal with which the mobile communication device is configured to communicate. Each respective service icon may be selectable by a user to access a corresponding client program of the associated service served by the communications portal. At least some of the service selectors may further include a shared status icon indicating an operational state of the service and/or associated client program.

Abstract: De-sulfurizing a NOx adsorber catalyst (48) without significantly increasing the temperature of exhaust gases leaving the engine exhaust manifold (42) by using a diesel oxidation catalyst (46) between the exhaust manifold and the NOx adsorber catalyst to elevate exhaust gas temperature entering the NOx adsorber catalyst to suitable de-sulfurizing temperature through control of certain aspects of engine operation (24, 28, 52).

Abstract: De-sulfurizing a NOx adsorber catalyst (48) without significantly increasing the temperature of exhaust gases leaving the engine exhaust manifold (42) by using a diesel oxidation catalyst (46) between the exhaust manifold and the NOx adsorber catalyst to elevate exhaust gas temperature entering the NOx adsorber catalyst to suitable de-sulfurizing temperature through control of certain aspects of engine operation (24, 28, 52).

Abstract: A control system (FIG. 4) for controlling regeneration of a DPF comprises a favorable-condition-based control section (52), a regular control section (54), and a regeneration termination control section (56). Section (54) initiates regeneration when the actual soot loading of the DPF becomes sufficiently large to mandate initiation of regeneration. Section (52) initiates regeneration when the actual soot loading reaches an amount less than the amount at which section (54) mandates regeneration, provided that selected engine operating conditions disclose conditions favorable for regeneration. Section (56) terminates regeneration when soot loading is reduced to some minimum amount or when conditions for continuing regeneration become unfavorable. By burning trapped soot during favorable conditions, the mandatory regeneration is postponed. This can lower the average amount of trapped soot in the CDPF, thereby lowering the average back-pressure on the engine.

Abstract: A control system (FIG. 4) for controlling regeneration of a DPF comprises a favorable-condition-based control section (52), a regular control section (54), and a regeneration termination control section (56). Section (54) initiates regeneration when the actual soot loading of the DPF becomes sufficiently large to mandate initiation of regeneration. Section (52) initiates regeneration when the actual soot loading reaches an amount less than the amount at which section (54) mandates regeneration, provided that selected engine operating conditions disclose conditions favorable for regeneration. Section (56) terminates regeneration when soot loading is reduced to some minimum amount or when conditions for continuing regeneration become unfavorable. By burning trapped soot during favorable conditions, the mandatory regeneration is postponed. This can lower the average amount of trapped soot in the CDPF, thereby lowering the average back-pressure on the engine.

Abstract: An exhaust system (16) of a diesel engine (10) has a diesel particulate filter (18) for treating exhaust gas. When trapped soot has accumulated to an extent that may affect performance of the filter, an engine control system (12) forces combustion of trapped soot by increasing exhaust back-pressure using a control device (20) such as a back-pressure control valve or vanes of a variable geometry turbocharger.