Hybrid spaces in the city

This investigation is about the edge, hybrid space, and public engagement in the urban environment in Washington, DC. There are three phases of this research. In Phase 1, the investigation focuses on clarifying the definitions of terms such as edge, transition, vegetated, and constructed spaces. In Phase 2, the study explores methods of understanding urban fabric based on the experiential and physical analysis. In Phase 3, the investigation generates critiques of the site conditions between Union Station and Union Square in Washington, DC. The film The Social Life of Small Urban Spaces by William Whyte, which shows people’s different behaviors in a plaza in New York City, has inspired this study. In the urban environment, people prefer to stay in and use certain places. The edge is the primary place people prefer to occupy. The goal of this thesis is to find out what spatial factors contribute to encouraging public engagement

Object Re-Identification Based on Deep Learning

With the explosive growth of video data and the rapid development of computer vision technology, more and more relevant technologies are applied in our real life, one of which is object re-identification (Re-ID) technology. Object Re-ID is currently concentrated in the field of person Re-ID and vehicle Re-ID, which is mainly used to realize the cross-vision tracking of person/vehicle and trajectory prediction. This chapter combines theory and practice to explain why the deep network can re-identify the object. To introduce the main technical route of object Re-ID, the examples of person/vehicle Re-ID are given, and the improvement points of existing object Re-ID research are described separately

Measurement of Absorption Cross Section of a Lossy Object in Reverberation Chamber Without the Need for Calibration

A reliable and simple procedure is proposed to measure the averaged absorption cross section (ACS) of a lossy object in a reverberation chamber (RC). This procedure is based on the time-domain measurement of the ACS in an RC. In the time-domain, to obtain the ACS, the chamber decay time needs to be known. Conventionally, the ACS is normally measured in the frequency domain, and a full two-port calibration must be carried out before collecting the S-parameters, which is tedious and time-consuming. In reality, the chamber decay time depends on the diffused loss of the RC, not the insertion loss of the cables. In this paper, by making use of this fact, the ACS can be measured accurately without calibration, which will simplify the measurement process and shorten the measurement time at the same time