摘要:
A system may be configured for implementing targeted attacks on deep reinforcement learning-based autonomous driving with learned visual patterns. In some examples, processing circuitry receives first input specifying an initial state for a driving environment and user configurable input specifying a target state. Processing circuitry may generate a representative dataset of the driving environment by performing multiple rollouts of the vehicle through the driving environment, including performing an action for the vehicle from the initial state with variable strength noise added to determine a next state for each rollout resulting from the action. Processing circuitry may train an artificial intelligence model to output a next predicted state based on the representative dataset as training input. In such an example, processing circuitry outputs from the artificial intelligence model, an attack plan against the autonomous driving agent to achieve the target state from the initial state.
摘要:
The present disclosure discloses a porous metal matrix composite (MMC), wherein the porous MMC includes a metal material, a spacing material forming an interconnected structure and embedded in the metal material to form an interface between the metal material and the interconnected structure; and a first plurality of pores located at the interface.
摘要:
A method for making a nano-scale film includes the steps of: (a) providing a suspension including an organic solvent and a number of nano-scale particles dispersed therein; (b) dropping/releasing the suspension into a liquid having a specific gravity greater than that of the nano-scale particles; and (c) forming a uniform film of nano-scale particles on the surface of the liquid.
摘要:
Provided is a fetching device for fast and accurately fetching or caching items including an input device that can store signals of multiple types of items, an intermediate device having functions of accepting, converting and transmitting signals, and a receiving device that can indicate the location of the item. The signals of the items to be fetched or cached are sent to the input device. Then, the signal is submitted to the intermediate device. Upon receipt of the signal, the intermediate device will transmit the received signal to the receiving device. After receiving the signal, the receiving device will emit weak signal warning, such as analog light signals or sound, from the location of the item. The operator can easily identify the location of the item that need to be fetched or cached, and achieve the effect of fast and accurately fetching and caching item.
摘要:
A blood pump includes a rotor having a flared portion downstream proximate a downstream bearing that supports the rotor. The flared portion of the rotor includes a width greater than a width of an upstream portion of the rotor. A blood pump also includes a housing having an internal wall with a flared portion downstream of a motor stator and proximate a transverse outlet.
摘要:
According to various embodiments, multiple frames, each having image data and metadata, can be aggregated into pictures. The frames may come from different image capture devices, enabling aggregation of image data from multiple sources. Aggregation can be automatic, or it can be performed in response to user input specifying particular combinations of frames to be aggregated. In various embodiments, pictures are mutable, whereas immutability of the constituent frames is enforced. In various embodiments, certain metadata elements that are not essential to rendering can be selectively removed from frames, so as to address privacy concerns. In various embodiments, frames can be authenticated by the use of digests generated by a hash function.
摘要:
According to various embodiments of the invention, improved downsampling techniques are employed, which can be applied to light field images and which preserve the ability to refocus (and otherwise manipulate) such images. Groups of pixels, rather than individual pixels, are downsampled; such groups of pixels can be defined, for example, as disks of pixels. Such downsampling is accomplished, for example, by aggregating values for pixels having similar relative positions within adjacent disks (or other defined regions or pixel groups) of the image. When applied to light field images, the downsampling techniques of the present invention reduce spatial resolution without sacrificing angular resolution. This ensures that the refocusing capability of the resulting light field image is not reduced and/or adversely impacted.
摘要:
A 3D stereo image of a scene is generated by generating first image data of the scene using light field data representing light rays from a first direction, and second image data of the scene using light field data representing light rays from a second direction. The 3D stereo image of the scene is then generated using the first image data and the second image data. A microlens array may be used to direct light rays onto a photosensor array, wherein each microlens of the microlens array includes a physical aperture which correlates to a plurality of associated photosensors, a first virtual aperture which correlates to a first subset of the associated photosensors, and a second virtual aperture which correlates to a second subset of the associated photosensors. Each virtual aperture thus provides light rays from a different direction for use in generating the 3D stereo image.
摘要:
A light field data acquisition device includes optics and a light field sensor to acquire light field image data of a scene. In at least one embodiment, the light field sensor is located at a substantially fixed, predetermined distance relative to the focal point of the optics. In response to user input, the light field acquires the light field image data of the scene, and a storage device stores the acquired data. Such acquired data can subsequently be used to generate a plurality of images of the scene using different virtual focus depths.
摘要:
A drive system of an electric vehicle includes a drive motor, a transmission and a hydraulic system. The transmission has an input shaft, a countershaft, an output shaft, a first transmission unit placed between the countershaft and the output shaft, a first clutch, a second transmission unit placed between the countershaft and the input shaft, and a second clutch. The drive motor is attached to the input shaft, which is attached to the countershaft to provide power of the drive motor to the countershaft; the first clutch is configured for linking or cutting off the power transmission between the countershaft and the first transmission unit; and the second clutch is configured for linking or cutting off the power transmission between the countershaft and the second transmission unit. The first transmission unit has a first transmission ratio greater than a second transmission ratio of the second transmission unit.