scholarly journals Fingerprinting-Based Indoor Localization Using Interpolated Preprocessed CSI Phases and Bayesian Tracking

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2854 ◽  
Author(s):  
Wenxu Wang ◽  
Damián Marelli ◽  
Minyue Fu
Keyword(s):  
Indoor Localization ◽  
Multipath Propagation ◽  
Channel State ◽  
State Information ◽  
Localization Accuracy ◽  
Second Stage ◽  
Third Stage ◽  
Positioning Method ◽  
Three Stages ◽  
Position Estimate

Indoor positioning using Wi-Fi signals is an economic technique. Its drawback is that multipath propagation distorts these signals, leading to an inaccurate localization. An approach to improve the positioning accuracy consists of using fingerprints based on channel state information (CSI). Following this line, we propose a new positioning method which consists of three stages. In the first stage, which is run during initialization, we build a model for the fingerprints of the environment in which we do localization. This model permits obtaining a precise interpolation of fingerprints at positions where a fingerprint measurement is not available. In the second stage, we use this model to obtain a preliminary position estimate based only on the fingerprint measured at the receiver’s location. Finally, in the third stage, we combine this preliminary estimation with the dynamical model of the receiver’s motion to obtain the final estimation. We compare the localization accuracy of the proposed method with other rival methods in two scenarios, namely, when fingerprints used for localization are similar to those used for initialization, and when they differ due to alterations in the environment. Our experiments show that the proposed method outperforms its rivals in both scenarios.

scholarly journals An Indoor Localization System Using Residual Learning with Channel State Information

Entropy ◽  
2021 ◽  
Vol 23 (5) ◽  
pp. 574
Author(s):  
Chendong Xu ◽  
Weigang Wang ◽  
Yunwei Zhang ◽  
Jie Qin ◽  
Shujuan Yu ◽  
...  
Keyword(s):  
Channel State Information ◽  
Indoor Environment ◽  
Indoor Localization ◽  
Location Based Services ◽  
Channel State ◽  
State Information ◽  
Localization Accuracy ◽  
Localization System ◽  
Increasing Demand ◽  
Degradation Problem

With the increasing demand of location-based services, neural network (NN)-based intelligent indoor localization has attracted great interest due to its high localization accuracy. However, deep NNs are usually affected by degradation and gradient vanishing. To fill this gap, we propose a novel indoor localization system, including denoising NN and residual network (ResNet), to predict the location of moving object by the channel state information (CSI). In the ResNet, to prevent overfitting, we replace all the residual blocks by the stochastic residual blocks. Specially, we explore the long-range stochastic shortcut connection (LRSSC) to solve the degradation problem and gradient vanishing. To obtain a large receptive field without losing information, we leverage the dilated convolution at the rear of the ResNet. Experimental results are presented to confirm that our system outperforms state-of-the-art methods in a representative indoor environment.

scholarly journals Kullback–Leibler Divergence Based Probabilistic Approach for Device-Free Localization Using Channel State Information

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4783
Author(s):  
Gao ◽  
Zhang ◽  
Xiao ◽  
Li
Keyword(s):  
Channel State Information ◽  
Indoor Localization ◽  
Probabilistic Approach ◽  
Indoor Environments ◽  
Channel State ◽  
State Information ◽  
Localization Accuracy ◽  
Sensing Applications ◽  
Leibler Divergence ◽  
Device Free

Recently, people have become more and more interested in wireless sensing applications, among which indoor localization is one of the most attractive. Generally, indoor localization can be classified as device-based and device-free localization (DFL). The former requires a target to carry certain devices or sensors to assist the localization process, whereas the latter has no such requirement, which merely requires the wireless network to be deployed around the environment to sense the target, rendering it much more challenging. Channel State Information (CSI)—a kind of information collected in the physical layer—is composed of multiple subcarriers, boasting highly fined granularity, which has gradually become a focus of indoor localization applications. In this paper, we propose an approach to performing DFL tasks by exploiting the uncertainty of CSI. We respectively utilize the CSI amplitudes and phases of multiple communication links to construct fingerprints, each of which is a set of multivariate Gaussian distributions that reflect the uncertainty information of CSI. Additionally, we propose a kind of combined fingerprints to simultaneously utilize the CSI amplitudes and phases, hoping to improve localization accuracy. Then, we adopt a Kullback–Leibler divergence (KL-divergence) based kernel function to calculate the probabilities that a testing fingerprint belongs to all the reference locations. Next, to localize the target, we utilize the computed probabilities as weights to average the reference locations. Experimental results show that the proposed approach, whatever type of fingerprints is used, outperforms the existing Pilot and Nuzzer systems in two typical indoor environments. We conduct extensive experiments to explore the effects of different parameters on localization performance, and the results demonstrate the efficiency of the proposed approach.

The Coherence of Mary Barton: Romance, Realism, and Utopia

2015 ◽  
Vol 5 (3) ◽  
pp. 185-200
Author(s):  
Robert Z. Birdwell
Keyword(s):  
Thomas Carlyle ◽  
The Novel ◽  
Second Stage ◽  
The Third ◽  
Third Stage ◽  
Three Stages ◽  
Mode Of Production

Critics have argued that Elizabeth Gaskell's first novel, Mary Barton (1848), is split by a conflict between the modes of realism and romance. But the conflict does not render the novel incoherent, because Gaskell surpasses both modes through a utopian narrative that breaks with the conflict of form and gives coherence to the whole novel. Gaskell not only depicts what Thomas Carlyle called the ‘Condition of England’ in her work but also develops, through three stages, the utopia that will redeem this condition. The first stage is romantic nostalgia, a backward glance at Eden from the countryside surrounding Manchester. The second stage occurs in Manchester, as Gaskell mixes romance with a realistic mode, tracing a utopian drive toward death. The third stage is the utopian break with romantic and realistic accounts of the Condition of England and with the inadequate preceding conceptions of utopia. This third stage transforms narrative modes and figures a new mode of production.

scholarly journals Matemáticas para la Ingeniería de Sistemas [Mathematics for systems engineering]

2014 ◽  
Author(s):  
Iván Mauricio Argote ◽  
Robinson Andrés Jiménez
Keyword(s):  
Mathematics Education ◽  
Systems Engineering ◽  
Specific Area ◽  
Reconstruction Process ◽  
Second Stage ◽  
Engineering Program ◽  
Third Stage ◽  
Three Stages ◽  
Education Courses ◽  
Current Curriculum

Resumen La investigación tiene como propósito la restructuración de la malla curricular del Programa de Ingeniería de Sistemas, de la Universidad Mariana, respecto al área de matemática y su aporte al desarrollo de competencias del respectivo currículo. El proceso de reconstrucción del plan de estudios se llevó a cabo en tres etapas. La primera etapa presenta la identificación de los contenidos curriculares de los cursos de educación matemática del currículo vigente que son pertinentes y esenciales a la formación del Ingeniero de Sistemas. La segunda etapa determina los contenidos que no están presentes en el actual plan de estudios y que deben ser incorporados en los cursos de educación matemática para desarrollar el pensamiento lógico - matemático del Ingeniero de Sistemas. La tercera etapa rediseña los cursos del programa de educación matemática para que sean pertinentes y esenciales, con el área específica del programa de Ingeniería de Sistemas. Palabras Claves: Currículo, Matemática, Ingeniería de Sistemas, Pertinencia, Modelación.   Abstract The research has the purpose of restructuring the curriculum of the Systems Engineering Program, University of Mariana, respect to the area of mathematics and its contribution to the development of the skills of the respective curriculum. The reconstruction process of the curriculum took place in three stages. The first stage presented the identification of the curricula of mathematics education courses current curriculum that are relevant and material to the formation of Systems Engineer. The second stage determines the contents that are not present in the current curriculum and should be incorporated into mathematics education courses to develop logical thinking - Mathematical Systems Engineer. The third stage redesign courses mathematics education program to be relevant and material, with the specific area of Systems Engineering program. Keywords: Curriculum, Mathematics, Systems Engineering, Relevance, Modeling.

scholarly journals Animasi Tata Cara Penyelamatan Bencana Gempa Bumi Untuk Anak - Anak

2020 ◽  
Vol 2 (1) ◽  
pp. 33-42
Author(s):  
Gita Sispratiwi Faja ◽  
Nyoman Miyarta Yasa
Keyword(s):  
Information Dissemination ◽  
Public Knowledge ◽  
National Agency ◽  
School Students ◽  
The West ◽  
Earthquake Disaster ◽  
Second Stage ◽  
The Third ◽  
Third Stage ◽  
Three Stages

The National Agency for the Control of Britain (BNPB) noted that 515 people died from the earthquake in Lombok, West Nusa Tenggara (NTB). Seeing this problem, the author wants to make an animation of earthquake disaster relief procedures that will be used by the BPBD as an additional medium for socializing and delivering information to increase public knowledge about procedures for saving earthquake disasters, especially children. In the process of making this animation using the pipeline method which includes three stages, namely the first stage of pre-production, the second stage of production The third stage of post-production. After doing all the stages are expected to be able to produce animation procedures for earthquake disaster rescue for children. So that this animated video can be used as a media for information dissemination or information delivery by the West Nusa Tenggara Province BPBD office which is more effective for introducing elementary school students. To determine the feasibility of the animation that was made, a beta test was conducted by submitting questionnaires to 30 respondents. The results obtained are animated procedures for rescuing earthquake disasters for children to be used as media for information dissemination or delivery of information by the West Nusa Tenggara Province BPBD office.

scholarly journals URBAN PLANNING IN LIBYA – EVOLUTION, LEVELS, PROBLEMS

HERALD ◽  
2017 ◽  
Vol 7 (19) ◽  
Author(s):  
Abousa Hadoud
Keyword(s):  
Urban Planning ◽  
Urban Development ◽  
Urban Environment ◽  
Natural Increase ◽  
The Public ◽  
Second Stage ◽  
The Third ◽  
Third Stage ◽  
Three Stages ◽  
Development And Environment

Urban planning in Libya in general effectively contributed to preparation of comprehensive and the public plans for all Libyan cities. especially after the issuance of Law No. (5) of 1969, concerning the planning of cities and villages, three key schemes have been developed in three stages starting from the first phase for years 1968 to 1988, and the second stage years from 1988 to 2000, and the third stage years 2000 to 2025. Goal of such schemes is to make a balance between the natural increase of population and urban mass, in order to achieve urban development and environment and preserve of the environment and urban environment from degradation and the spread of degraded areas in Libyan cities. But a number of problems disrupted the planning, and have had effects on the urban development in Libya.

scholarly journals Aplikasi Sistem Pakar Diagnosa Penyakit Pada Anak Bawah Lima Tahun Menggunakan Metode Forward Chaining

2017 ◽  
Vol 3 (1) ◽  
pp. 61 ◽  
Author(s):  
Bagus Fery Yanto ◽  
Indah Werdiningsih ◽  
Endah Purwanti
Keyword(s):  
Expert System ◽  
System Application ◽  
Disease Diagnosis ◽  
Information Collection ◽  
Forward Chaining ◽  
Second Stage ◽  
Children Health ◽  
Third Stage ◽  
Testing Data ◽  
Three Stages

Abstrak— Anak-anak pada usia 2 bulan sampai 5 tahun (Balita) lebih rentan terkena penyakit. Lingkungan sangat mempengaruhi kesehatan Balita. Penelitian ini bertujuan untuk membuat sebuah aplikasi sistem pakar diagnosa penyakit pada Balita berbasis mobile. Penelitian ini terdiri dari tiga tahap. Tahap pertama adalah pengumpulan data dan informasi dari Manajemen Terpadu Balita Sakit (MTBS) dan wawancara dengan Bidan. Dari pengumpulan data dan informasi tersebut ditemukan fakta penyakit, keluhan, gejala dan saran penanganan. Tahap kedua adalah pembuatan rule dengan 18 penyakit. Tahap ketiga adalah implementasi aplikasi sistem pakar berbasis mobile dengan fitur diagnosa penyakit, riwayat diagnosa dan kumpulan penyakit. Aplikasi sistem pakar yang dibuat dapat mendiagnosa penyakit dan memberikan saran penanganan. Hasil evaluasi dari 50 data uji coba menghasilkan tingkat akurasi sebesar 82%, dimana 41 hasil diagnosa yang benar dan 9 diagnosa yang salah. Kata Kunci— Sistem Pakar, Forward Chaining, Diagnosa Penyakit, Manajemen Terpadu Balita Sakit, Knowladge BaseAbstract— Children at the age of 2 months to 5 years (toddlers) are more susceptible to disease contagious. Environmental condition significantly influences the children health. This  research aimed to create a mobile-based expert system application to diagnose disease in toddlers. This research consist of three stages. The first stage were data and information collection from Manajemen Terpadu Balita Sakit  (MTBS) and interview with medical staffs. From the first stage, we can discover the disease facts, signs, symptoms and treatment advices. The second stage was the construction of rules for 18 diseases. The third stage was the implementation of mobile-based expert system application with features of disease diagnosis, diagnosis history and collection of disease diagnosis. Expert system application made able to diagnose the disease and provide treatment advice. The results of evaluation using 50 testing data provides the level of accuracy of 82%, where 41 diagnosis result were true and 9 diagnosis were false. Keywords— Expert System, Forward Chaining, Disease Diagnosis, Manajemen Terpadu Balita Sakit, Knowledge Base

scholarly journals Wayang Klithik Robot

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Gandar Setiawan1
Keyword(s):  
Main Idea ◽  
Three Dimension ◽  
Visual Form ◽  
Second Stage ◽  
Third Stage ◽  
Three Stages

Wayang is a autentic culture from Indonesia. Wayang has many figure and character. It is main idea of this make the artwork. Inspiration of the artwork also from observation robot forms. Robot has the furious and futuristic form. Like the progression of technologi, form of robot also more experiencing form progression. Until now, form of robot still identic and can not losed from imajinative forms. This prossesing to make the artwork use created methode from Gustami, it is a three stages six steps creating craft artwork. First stage is eksploration consist of observation and finding refference steps. Second stage is desaigning consist of making the sketch and making the gambar teknik or modeling steps. Third stage is forming consist of create artwork and finished with value and evaluation steps. Result of visual form is a three dimension artwork with futuristic robot form. Visual form the artwork is a transformastion of futuristic wayang klithik with robot form. The puppet figures are Wrekudara and Gatotkaca Combination form is a method for impression and aesthete value of the artwork. Wayang merupakan budaya asli dari Indonesia. Wayang memiliki berbagai macam tokoh dan karakter. Wayang menjadi ide utama dalam penciptaan karya ini. Inspirasi karya juga muncul dari pengamatan bentuk-bentuk robot. Robot memiliki bentuk yang variatif dan futuristik. Sesuai dengan perkembangan teknologi, bentuk robot juga mengalami perkembangan yang lebih bermacam-macam. Sampai saat ini, bentuk robot masih identik dan tidak bisa lepas dari bentuk-bentuk imajinatif. Proses pembuatan karya seni ini menggunakan metode penciptaan dari Gustami, yaitu metode tiga tahap enam langkah dalam menciptakan karya seni kriya. Tahap pertama yaitu eksplorasi yang meliputi langkah pengamatan dan pencarian sumber pustaka. Tahap kedua merupakan tahap perancangan yang terdiri dari langkah pembuatan beberapa sketsa dan pembuatan gambar teknik ataupun model. Tahap yang ketiga yaitu tahap perwujudan yang terdiri langkah pengerjaan karya, dan diakhiri dengan penilaian juga evaluasi karya yang telah jadi. Bentuk visual yang dihasilkan yaitu karya seni tiga dimensi dengan bentuk futuristik menyerupai robot. Bentuk visual karya merupakan penggabungan antara bentuk wayang klithik dengan bentuk robot. Tokoh wayang yang dibuat yaitu Wrekudara dan Gatotkaca. Perpaduan bentuk dilakukan sebagai cara untuk memberikan kesan dan nilai estetik pada karya.

Signs of polichnous deformations in microstructures of carbonate rocks of the Katav-Yuryuzan zone of transpression (Southern Urals)

2020 ◽  
pp. 13-21
Author(s):  
A. V. Tevelev ◽  
A. A. Borisenko ◽  
M. I. Erokhina ◽  
S. S. Popov ◽  
I. A. Kosheleva ◽  
...  
Keyword(s):  
Simple Shear ◽  
Carbonate Rocks ◽  
Pure Shear ◽  
Southern Urals ◽  
Second Stage ◽  
The Third ◽  
The North ◽  
Third Stage ◽  
Three Stages ◽  
Two Stages

The Katav-Ivanovsk transpression zone experienced at least two stages of tectonic deformations, and the sequence of deformations was approximately the same throughout the entire zone — from the Bakal-Satka fault in the south to the Suleimsky fault in the north. Three stages of the formation of parageneses were identified. The parageneses of the first and the second stages were formed in a pure shear environment, and the paragenesis of the third stage — in a simple shear environment. There are stylolites (S1) parallel to bedding, and mineral veins (V1) in the paragenesis of the first stage. Paragenesis of the second stage combines stylolites (S2), mineral veins (V2) and intergranular cleavage (S2). In paragenesis of the third stage were distinguished schistosity (S3), milonites (S3), cataclasites, mica packets (SC-textures), and the rotation structures of porphyroblasts.

Sign in / Sign up

Export Citation Format

Share Document