Three-dimensional AlN microroses and their enhanced photoluminescence properties

Novel three-dimensional AlN microroses, for the first time, have been synthesized via direct reaction between Al and N2 in arc plasma without any catalyst and template.<br /

AlN nanostructures : tunable architectures and optical properties

Novel AlN nanostructures with tunable building units of the architectures have been successfully synthesized without any catalyst or template; the subsequent photoluminescence (PL) indicates that the optical properties of the AlN nanostructures can be adjusted by tuning the architectures.<br /

One-step synthesis of AlN branched nanostructures by an improved DC arc discharge plasma method

Aluminium nitride (AlN) branched nanostructures with tree shapes and sea urchin shapes are synthesized via a one-step improved DC arc discharge plasma method without any catalyst and template. The branched nanostructures with tree shapes and sea urchin shapes can be easily controlled by the location of collection. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies show that the branches of tree shaped nanostructures grow in a sequence of nanowires, nanomultipeds and nanocombs. The growth mechanisms of these branched nanostructures are discussed in detail. The optical properties of AlN branched nanostructures with tree shapes and sea urchin shapes are investigated

Intelligent Data Mining of Computer-Aided Extension Residential Building Design Based on Algorithm Library

In recent years, with the development of construction industry, more scientific, systematic, fast, and intelligent calculation methods are needed to coordinate urban development and fierce market competition, and mathematical algorithm library plays an important role in artificial intelligence. Therefore, the author uses computer mathematical algorithm and extension theory to study and analyze the residential building design and intelligent data mining. It is found that the research of the computer-aided expression method of extension building planning is mainly the expression of the input and output system of extension building planning. It includes knowledge representation, system outline design, system flow, and interface expression based on the mathematical database

A clustering-based method of typical architectural case mining for architectural innovation

Architectural innovation is important for improving the built environment. In recent years, an increasing number of architects have focused on this field. A comprehensive understanding of existing building design patterns contributes to reasonable innovation. Based on the large number of architectural cases on the internet in the big data era, this study proposes a three-stage case mining method, containing case collection, case analysis and case study, to find typical architectural cases, discover existing design patterns and create new design patterns by using cluster analysis of architectural cases. An extensive architectural design case mining system and a case clustering program are developed to assist in the case analysis. An agglomerative hierarchical clustering algorithm is applied to support the case clustering program. The example shows the complete application process and practical effect of the proposed method. With this intelligent method, architects can make more reasonable innovations in projects. The proposed typical case mining method is also expected to be useful for engineers and planners with similar needs

The Validity of Street View Service Applied to Ambiance Perception of Street: A Comparison of Assessment in Real Site and Baidu Street View

The street view service, like Google Street View and Baidu Street View, has emerged as a research tool to capture the visual perception data of observers. This research explores the validity of Street View service tool using in visual perception assessment on historical block—can Street View service provides perceptual results consistent with reality. We conducted a survey based on the real environment and Baidu Street View pictures on two typical historical streets in Harbin, China. User's subjective perception of the quality of streets and ambiance were compared. The findings show Street View has good validity on the subjective perception part of street quality, but on the ambiance perception, there is a significant difference between Street View and real site audit. Meanwhile, the validity of Street View on the ambiance differs for different types of streets