Empirical mmWave channel measurements and modelling in indoor and outdoor complex environments for 5G communications

2021 ◽  
pp. 523-549
Keyword(s):  
Channel Measurements ◽  
Complex Environments ◽  
Indoor And Outdoor

scholarly journals Muskmelon Maturity Stage Classification Model Based on CNN

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Huamin Zhao ◽  
Defang Xu ◽  
Olarewaju Lawal ◽  
Shujuan Zhang
Keyword(s):  
Data Augmentation ◽  
Input Image ◽  
Classification Model ◽  
Maturity Stage ◽  
Complex Environments ◽  
Excellent Performance ◽  
Novel Approach ◽  
Stage Classification ◽  
Computer Based ◽  
Indoor And Outdoor

How to quickly and accurately judge the maturity of muskmelon is very important to consumers and muskmelon sorting staff. This paper presents a novel approach to solve the difficulty of muskmelon maturity stage classification in greenhouse and other complex environments. The color characteristics of muskmelon were used as the main feature of maturity discrimination. A modified 29-layer ResNet was applied with the proposed two-way data augmentation methods for the maturity stages of muskmelon classification using indoor and outdoor datasets to create a robust classification model that can generalize better. The results showed that code data augmentation which is the first way caused more performance degradation than input image augmentation—the second way. This established the effectiveness of the code data augmentation compared to image augmentation. Nevertheless, the two-way data augmentations including the combination of outdoor and indoor datasets to create a classification model revealed an excellent performance of F1 score ∼99%, and hence the model is applicable to computer-based platform for quick muskmelon stages of maturity classification.

scholarly journals Tripolarizated MIMO: Experimental Analysis and Modeling of Channel Properties in Both Indoor and Outdoor Scenarios

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Pan Tang ◽  
Jianhua Zhang ◽  
Zuolong Ying ◽  
Yuxiang Zhang ◽  
Lei Tian ◽  
...  
Keyword(s):  
Communication Systems ◽  
Large Scale ◽  
Mimo Systems ◽  
Mimo System ◽  
High Capacity ◽  
Small Scale ◽  
Delay Spread ◽  
Channel Measurements ◽  
Channel Properties ◽  
Indoor And Outdoor

The tripolarized MIMO system can provide one more degree of freedom and have a more compacted size over a dual-polarized MIMO system, which is attractive for high-capacity wireless communication systems. In this paper, we analyze and model channel properties for tripolarized MIMO systems based on experimental channel measurements in typical indoor and outdoor scenarios. Firstly, channel measurement campaigns in the laboratory and the Urban Micro (UMi) scenarios on sub-6 GHz bands are presented. Then, based on measured data, path loss, delay spread (DS), and cross-polarization discrimination (XPD) for 9 polarization combinations are analyzed and modeled in a statistical way. Statistical results of these channel properties are also given. It is observed that channel properties of both large-scale fading and small-scale fading depend strongly on the polarization direction. Furthermore, we evaluate the performance of tripolarized MIMO systems by analyzing the Demmel condition number and channel capacity gain (CG). For both the indoor and the outdoor scenarios, it is found that colocated tripolarized antenna can bring a nearly threefold CG with respect to the unipolarized one. These results can give good insights into the design and evaluation of tripolarized MIMO systems.

31. Indoor and Outdoor Concentration Levels of Airborne Fungi in Cincinnati Area Homes: Pilot Study

2005 ◽  
Author(s):  
T. Lee ◽  
D. Martuzevicius ◽  
C. Crawford ◽  
A. Adhikari ◽  
T. Reponen ◽  
...  
Keyword(s):  
Pilot Study ◽  
Airborne Fungi ◽  
Outdoor Concentration ◽  
Concentration Levels ◽  
Indoor And Outdoor

Assessment of exposure by size-resolved indoor and outdoor particle sources in residential buildings

2019 ◽  
Vol 18 (4) ◽  
pp. 346-353 ◽  
Author(s):  
Kyungmo Kang ◽  
◽  
Taeyeon Kim ◽  
Yun Gyu Lee
Keyword(s):  
Residential Buildings ◽  
Indoor And Outdoor

Indoor and outdoor air quality monitoring in hemp house — Case study

2011 ◽  
Vol 6 (3) ◽  
pp. 63-72 ◽  
Author(s):  
Jarmila Rimbalová ◽  
Silvia Vilčeková ◽  
Adriana Eštoková
Keyword(s):  
Air Quality ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Outdoor Air ◽  
Outdoor Air Quality ◽  
Indoor And Outdoor

Analysis of 60-GHz In-street Backhaul Channel Measurements and LiDAR Ray-based Simulations

2020 ◽  
Author(s):  
Mohammed Zahid Aslam ◽  
Yoann Corre ◽  
Jakob Belschner ◽  
Gnana Soundari Arockiaraj ◽  
Monika Jager
Keyword(s):  
60 Ghz ◽  
Channel Measurements
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