Abstract: A method for designing a multi-layer optical structure includes: obtaining candidate multi-layer optical structures through a sequence generator; obtaining a candidate spectrum for each candidate multi-layer optical structure; obtaining a difference between the candidate spectrum and a target spectrum; updating sequence generator parameters through reinforcement learning training and iteratively performing the obtainings and the updating in response to a first termination condition being not met; and selecting one of all obtained candidate structures to be a target multi-layer optical structure in response to the first termination condition being met. The difference between a spectrum of the target multi-layer optical structure and the target spectrum is minimized through the process. The method of the present application can perform the designs robustly and effectively.

Abstract: A material having a chrome-like appearance includes a substrate and a multilayer stack with at least three material layers, each is independently selected from the group consisting of: germanium (Ge), titanium oxide (TiO2), silicon dioxide (SiO2), titanium (Ti), nickel (Ni), aluminum (Al), aluminum oxide (Al2O3), silver (Ag), gold (Au), magnesium fluoride (MgF2), magnesium oxide (MgO), silicon (Si), silicon oxide (SiO2), silicon carbide (SiC), tungsten (W), hafnium oxide (HfO2), zinc (Zn), zinc oxide (ZnO), zinc sulfide (ZnS), zinc selenide (ZnSe), chalcogenides, iron oxide (Fe2O3) and combinations thereof. The material is free of chromium (Cr) and displays a specular reflectivity such that ? about 70% of wavelengths in a visible light range of 390 to 750 nm are reflected without scattering. In certain variations, a radiofrequency (RF)-transparent material having a chrome-like appearance is free of any metals. Methods of making the materials having the chrome-like appearance are also provided.

Abstract: An amphibious robot for in-service inspection of drainage pipelines and a control method thereof are provided. The robot includes a robot body, a detection module for detecting environmental state and pose information of robot itself, a propulsion module including a car-like propulsion module and a ship-like propulsion module for controlling robot movement, a structure conversion module for realizing the conversion between the two modes, a ground terminal controller for remote information monitoring and issuing instructions, a mobile terminal controller for receiving instructions and controlling robot movement and structure conversion, and a power module.

Abstract: A computer system includes memory hardware configured to store a multitask neural network, an optimization model, a material database, material feature vector inputs, and computer-executable instructions which include training the multitask neural network with the material feature vector inputs to generate a material structural parameter output, obtaining at least one of a target optical perception parameter and a target optical response, supplying the target optical perception parameter or target optical response and at least two of the multiple material data structures of the material database to the multitask neural network to output the at least one predicted material and the predicted structural parameter distribution, processing, by the optimization model, the predicted structural parameter distribution to generate a tuned structural parameter output, and transmitting the at least one predicted material and the tuned structural parameter output to a computing device to facilitate generation of an optica

Abstract: A method for designing a multi-layer optical structure includes: obtaining candidate multi-layer optical structures through a sequence generator; obtaining a candidate spectrum for each candidate multi-layer optical structure; obtaining a difference between the candidate spectrum and a target spectrum; updating sequence generator parameters through reinforcement learning training and iteratively performing the obtainings and the updating in response to a first termination condition being not met; and selecting one of all obtained candidate structures to be a target multi-layer optical structure in response to the first termination condition being met. The difference between a spectrum of the target multi-layer optical structure and the target spectrum is minimized through the process. The method of the present application can perform the designs robustly and effectively.

Abstract: Described herein is a technology for facilitating analysis of performance indicators. In accordance with one aspect, a hierarchical structure with a node representing a performance indicator is configured. Such configuration may include mapping one or more lowest level nodes to one or more data models for retrieving transactional data. In addition, one or more internal nodes of the hierarchical structure may be configured, including mapping the one or more internal nodes to one or more corresponding child nodes. The configuration data generated by such configuration may then be stored in a database for subsequent retrieval to generate a report.