نتایج جستجو برای: indoor environments

تعداد نتایج: 217391  

2016
Octav Chipara Gregory Hackmann Chenyang Lu

The efficient deployment and robust operation of many sensor network applications depend on deploying relays to ensure wireless coverage. Radio mapping aims to predict network coverage based on a small number of link measurements from sampled locations. Radio mapping is particularly challenging in complex indoor environments where walls significantly affect radio signal propagation. This paper ...

1996
Vítor Sequeira João G. M. Gonçalves M. Isabel Ribeiro

This paper presents a new 3D scene analysis system that automatically reconstructs the 3D model of real-world scenes from multiple range images acquired by a laser range finder on board of a mobile robot. The reconstruction is achieved through an integrated procedure including range data acquisition, geometrical feature extraction, planning the next view, registration and integration of multipl...

2008
HAMID FARROKHI

In most existing indoor acoustic ranging systems, a range is estimated based on measuring the TOA of an ultrasonic wave. Due to high directivity of ultrasonic transducers and high attenuation of ultrasonic waves with distance in air, these systems cannot provide a range in large indoor environments. To achieve longer ranges, a TOA-based acoustic ranging system that uses a low frequency audible ...

Journal: :American Journal of Public Health 1971

Journal: :Journal of Environmental Engineering (Transactions of AIJ) 2021

Journal: :The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2017

Journal: :American journal of public health 2003
Jonathan M Samet John D Spengler

The quality of our indoor environments affects well-being and productivity, and risks for diverse diseases are increased by indoor air pollutants, surface contamination with toxins and microbes, and contact among people at home, at work, in transportation, and in many other public and private places. We offer an overview of nearly a century of research directed at understanding indoor environme...

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