Aircraft recognition based on the discrepancy of polygon intersection area

2017 ◽  
Author(s):  
Xiujian Deng ◽  
Yanfang Wang ◽  
Qi Feng
Keyword(s):  
Intersection Area ◽  
Polygon Intersection

scholarly journals An Intersection Signal Control Mechanism Assisted by Vehicular Ad Hoc Networks

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1402 ◽  
Author(s):  
Zhen Cai ◽  
Zizhen Deng ◽  
Jinglei Li ◽  
Jinghan Zhang ◽  
Mangui Liang
Keyword(s):  
Waiting Time ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Control Mechanism ◽  
Signal Control ◽  
Traffic Flows ◽  
Intersection Signal Control ◽  
Intersection Area ◽  
Vehicle Information ◽  
Hoc Networks

The urban intersection signal decision-making in traditional control methods are mostly based on the vehicle information within an intersection area. The far vehicles that have not reached the intersection area are not taken into account, which results in incomplete information and even incorrectness in decision-making. This paper presents an intersection signal control mechanism assisted by far vehicle information. Using the aid of real-time information collection for far vehicles through vehicular ad hoc networks (VANETs), we can consider them together and calculate the accumulative waiting time for each intersection traffic flow at a future moment to make the optimal signal decision. Simulation results show that, under three different traffic flow environments—same even traffic flows, same uneven traffic flows, and different traffic flows—the two proposed implementation schemes based on the mechanism (fixed phase and period timing improvement scheme, and dynamic phase and period control scheme) show good performances, in which the average waiting time and the ratio of long-waiting vehicles are both less than the results of the traditional signal timing scheme. Especially, in the second scheme, the waiting time was reduced by an average of 38.6% and the ratio of long-waiting vehicles was reduced by an average of 7.67%.

scholarly journals The Temporoparietal Fiber Intersection Area and Wernicke Perpendicular Fasciculus

Neurosurgery ◽  
2013 ◽  
Vol 73 (2) ◽  
pp. E381-E382 ◽  
Author(s):  
Andreas Joachim Bartsch ◽  
Karsten Geletneky ◽  
Saad Jbabdi
Keyword(s):  
Intersection Area

scholarly journals PENGARUH KEMACETAN DI SIMPANG CILIWUNG TERHADAP DERAJAD PELAYANAN DI SIMPANG PROGRESIF

2018 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
Supiyono, Dwi Ratnaningsih, Rudy Ariyanto
Keyword(s):  
Degree Of Saturation ◽  
Traffic Density ◽  
Density Level ◽  
Signal Coordination ◽  
The Road ◽  
Vehicle Density ◽  
Arterial Road ◽  
Intersection Area ◽  
Light Signals ◽  
The City

Abstract Highway in Malang there that needs to be analyzed is Intersections Letjend S. Parman Street – Ciliwung Street and Letjend Sutoyo Street – Letjend Selorejo. The road is an arterial road in the city of Malang with a high vehicle density level (Saputra, 2013). The Street was a high traffic flow led to queues or long saturated flow that is not supported by the settings of the light signals in accordance with the conditions in the field so often causes congestion. From finding a solution the traffic density in the study Letjend S Parman Street – Ciliwung Street and Letjend Sutoyo Street – Letjend Selorejo with Indonesia Highway Capasity Manual (IHCM). After stages 3-signal coordination calculation in Ciliwung Intersection of Malang, Intersection obtained time peak hours at the intersection area occurred at 11.00 – 12.00 GMT. Performance 3-waay junction on the Ciliwung Malang at this time has not met the target. Seen from there is still a Degree of Saturation (DS) which do not meet the targets ( ≤ 0,75), namely 0,83. After having don e engineering into 3 phases and cycle time 100 minutes Degree of Saturation (DS) be 0,77. Keywords: intersection, peak hours, capacity and degree saturation

scholarly journals Vulnerabilidade socioambiental como base para a gestão costeira no município de Paracuru – Ceará

2020 ◽  
Vol 13 (6) ◽  
pp. 2820
Author(s):  
Cristiano Da Silva Rocha ◽  
Fábio Perdigão Vasconcelos ◽  
Delano Nogueira Amaral ◽  
Maria Bonfim Casemiro ◽  
Otávio Augusto de Oliveira Lima Barra
Keyword(s):  
Social Media ◽  
Coastal Management ◽  
Social Vulnerability ◽  
Conservation Units ◽  
Coastal Planning ◽  
Environmental Vulnerability ◽  
Sample Unit ◽  
Intersection Area ◽  
Coastal Municipality

A geografia desempenha um papel importante quando existem trabalhos que tentam relacionar sociedade e natureza, estabelecendo formas (ou variáveis) para qualificar os elementos que compõem a paisagem. Neste trabalho, o objetivo foi aplicar a classificação da vulnerabilidade socioambiental adaptada de Medeiros e Souza (2016), com contribuições de Milanezi e Pereira (2016), como forma de contribuir com a gestão costeira de Paracuru- Ceará. Paracuru é um município costeiro, em que estão presentes diversos ambientes e três Unidades de Conservação Estaduais localizados no rio Curu e nas dunas de Paracuru. Para a análise, sobrepôs-se o mapa de vulnerabilidade ambiental (gerado a partir dos mapas de unidades geoambientais e de uso e ocupação) e de vulnerabilidade social, utilizando 17 variáveis incluídas no cálculo do índice organizados por setores censitários, menor unidade amostral. Foi observado trechos de vulnerabilidade socioambiental alta no setor próximo do rio Curu, na localidade de Santa Rita, com área de interseção de 2,3km² sede urbana localidade denominada de 2,3km² de interseção e setor 16, nas localidades de Muriti, Córrego do Curu e Pedrinhas, com interseção de aproximadamente 800 m². Nas dunas a sobreposição foi predominante de vulnerabilidade ambiental alta e vulnerabilidade social média – alta. Espera-se que as informações possam indicar os ambientes e seções da cidade que são mais suscetíveis e que essas áreas precisam de maior proteção. Socio-environmental vulnerability as a basis for coastal management in the municipality of Paracuru - CearáA B S T R A C TGeography makes an important role when there are works that try to relate society and nature, establishing forms (or variables) to qualify the elements that make up the landscape. In this work, the objective was to apply the classification of socio-environmental vulnerability adapted from Medeiros and Souza (2016), with contributions from Milanezi and Pereira (2016), as a way to contribute to the coastal management of Paracuru-Ceará. Paracuru is a coastal municipality, where there are several environments and three State Conservation Units located on the Curu River and on the Paracuru dunes. For the analysis, the map of environmental vulnerability (generated from the maps of geoenvironmental units and of use and occupation) and social vulnerability was superimposed, using 17 variables included in the calculation of the index organized by census sectors, the smallest sample unit. It was observed stretches of high socio-environmental vulnerability in the sector in the APA of the Curu River, in the locality of Santa Rita, with an intersection area of 2.3 km², in the urban headquarters, places called plateau da barra and secondary carnaubinha 3.1 km² intersection and sector 16, in the localities of Muriti, Córrego do Curu and Pedrinhas, with an intersection of approximately 800 m². In the dunes, the overlap was predominant of high environmental vulnerability and medium - high social vulnerability. It is hoped that the information can serve as a basis for indicating the paths that management should follow to achieve sustainability.Keywords: Landscape, socio-environmental vulnerability, coastal planning.

Determination of the base position and working area for mobile manipulators

2016 ◽  
Vol 36 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Shunan Ren ◽  
Xiangdong Yang ◽  
Jing Xu ◽  
Guolei Wang ◽  
Ying Xie ◽  
...  
Keyword(s):  
Operation Mode ◽  
Mobile Manipulator ◽  
Planning Problem ◽  
Mobile Manipulators ◽  
Line Planning ◽  
Content Type ◽  
Practical Applications ◽  
Base Position ◽  
Intersection Area ◽  
Intersection Line

Purpose – The purpose of this paper is to determine the base position and the largest working area for mobile manipulators. The base position determines the workspace of the mobile manipulator, particularly when the operation mode is intermittent (i.e. the mobile platform stops when the manipulator conducts the task). When the base of the manipulator is in the intersection area of the Base’s Workable Location Spaces (BWLSes), the end effector (EE) can reach all path points. In this study, the intersection line of BWLSes is calculated numerically, and the largest working area is determined using the BWLS concept. The performance of this method is validated with simulations on specific surface segments, such as plane, cylinder and conical surface segments. Design/methodology/approach – The BWLS is used to determine the largest working area and the base position in which the mobile manipulator can reach all path points with the objective of reducing off-line planning time. Findings – Without considering the orientation of the EE, the base position and the working area for the mobile manipulator are determined using the BWLS. Compared to other methods, the proposed algorithm is beneficial when the planning problem has six dimensions, ensuring the reachability and stability of the EE. Originality/value – The algorithm needs no manual configuration, and its performance is investigated for typical surfaces in practical applications.

scholarly journals Tool Wear Assessment Approach Based on the Neighborhood Rough Set Model and Nearest Neighbor Model

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Ren Sheng ◽  
Xiaoran Zhu
Keyword(s):  
Rough Set ◽  
Nearest Neighbor ◽  
Milling Process ◽  
Two Dimension ◽  
Assessment Approach ◽  
Intersection Area ◽  
Neighborhood Rough Set ◽  
The Difference ◽  
Boundary Curves ◽  
Baseline State

In order to assess the degree of wear of tool for milling process quantitatively, a new assessment approach is proposed. Firstly, making full use of the neighbor information, two sensitive features are selected by using the neighborhood rough set model, and then, boundary curves are established by using the nearest neighbor model with noncounter data in two dimension spaces. Secondly, the intersection area or expanding area is used to describe the difference between two boundary models because the intersection area or expanding area can consider the effect of distance and angle simultaneously in two dimension spaces. Thirdly, after determining a baseline state, a new quantitative assessment indicator (QAI) can be calculated based on the intersection area or expanding area. The QAI can directly measure the difference between the model of baseline state and the model of unknown state and indirectly measure the degree of wear of tool. Finally, the effectiveness of the assessment approach is proven by using the Milling Dataset which was provided by the NASA Ames Research Center.

scholarly journals Indoor Positioning on Disparate Commercial Smartphones Using Wi-Fi Access Points Coverage Area

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4351 ◽  
Author(s):  
Ashraf ◽  
Hur ◽  
Park
Keyword(s):  
Human Mobility ◽  
Indoor Positioning ◽  
Location Based Services ◽  
Indoor Environments ◽  
Coverage Area ◽  
Positioning Accuracy ◽  
Positioning Systems ◽  
Access Points ◽  
Intersection Area ◽  
The Impact

The applications of location-based services require precise location information of a user both indoors and outdoors. Global positioning system’s reduced accuracy for indoor environments necessitated the initiation of Indoor Positioning Systems (IPSs). However, the development of an IPS which can determine the user’s position with heterogeneous smartphones in the same fashion is a challenging problem. The performance of Wi-Fi fingerprinting-based IPSs is degraded by many factors including shadowing, absorption, and interference caused by obstacles, human mobility, and body loss. Moreover, the use of various smartphones and different orientations of the very same smartphone can limit its positioning accuracy as well. As Wi-Fi fingerprinting is based on Received Signal Strength (RSS) vector, it is prone to dynamic intrinsic limitations of radio propagation, including changes over time, and far away locations having similar RSS vector. This article presents a Wi-Fi fingerprinting approach that exploits Wi-Fi Access Points (APs) coverage area and does not utilize the RSS vector. Using the concepts of APs coverage area uniqueness and coverage area overlap, the proposed approach calculates the user’s current position with the help of APs’ intersection area. The experimental results demonstrate that the device dependency can be mitigated by making the fingerprinting database with the proposed approach. The experiments performed at a public place proves that positioning accuracy can also be increased because the proposed approach performs well in dynamic environments with human mobility. The impact of human body loss is studied as well.

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