Academic literature on the topic 'Port filtering'
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Journal articles on the topic "Port filtering"
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Pratiwi, Dwi Nurmasari, and Denar Regata Akbi. "Penerapan Metode Filtering Video Streaming dan Malware Pada Jaringan Local Area Network." Techno.Com 17, no. 4 (2018): 384–94. http://dx.doi.org/10.33633/tc.v17i4.1820.
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Jaringan komputer adalah jaringan penghubung komputer yang akan memberikan akses pada aplikasi layanan. Video Streaming merupakan layanan yang dapat mengkonsumsi bandwidth besar sehingga menyebabkan layanan akses lainnya tidak mendapatkan bandwidth yang cukup. Selain itu jaringan LAN sangat rentan sekali akan dimasuki oleh malware yang membuat jaringan sering down dan tidak stabil.Oleh karena itu, diperlukan adanya pengamanan jaringan dan filtering layanan. Dengan memanfaatkan router mikrotik dengan filtering port firewall dapat meminimalisir terjadinya penyebaran malware dan mengurangi penggunaan bandwidth. Metode Penelitiann yang dilakukan dengan studi literatur, perancangan, impelentasi, analisa pengujian. Hasil pengujian performansi sebelum implementasi filtering port pada jaringan LAN menunujukkan nilai bandwidth 98,04 Mbits, Jitter 0,046 ms, dan Packet loss 0,3 ms. Sedangkan pengujian nilai QoS setelah penerapan filtering port menunjukkan hasil bandwidth 364 Mbits, Jitter 0,022, dan packet loss 0,047. Performansi lebih stabil dan menunjukkan kinerja yang baik pada implementasi filteirng port video streaming. Hasil pengujian kenaikan dan penurunan nilai performansi masih dalam standart rekomendasii ITU-T.
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Pratiwi, Dwi. "Penerapan Metode Filtering Video Streaming dan Malware Pada Jaringan Local Area Network." SISTEMASI 7, no. 3 (2018): 230. http://dx.doi.org/10.32520/stmsi.v7i3.354.
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Jaringan komputer adalah jaringan penghubung komputer yang akan memberikan akses pada aplikasi layanan. Video Streaming merupakan layanan yang dapat mengkonsumsi bandwidth besar sehingga menyebabkan layanan akses lainnya tidak mendapatkan bandwidth yang cukup. Selain itu jaringan LAN sangat rentan sekali akan dimasuki oleh malware yang membuat jaringan sering down dan tidak stabil.Oleh karena itu, diperlukan adanya pengamanan jaringan dan filtering layanan. Dengan memanfaatkan router mikrotik dengan filtering port firewall dapat meminimalisir terjadinya penyebaran malware dan mengurangi penggunaan bandwidth. Metode Penelitiann yang dilakukan dengan studi literatur, perancangan, impelentasi, analisa pengujian. Hasil pengujian performansi sebelum implementasi filtering port pada jaringan LAN menunujukkan nilai bandwidth98,04 Mbits, Jitter 0,046 ms, dan Packet loss 0,3 ms. Sedangkan pengujian nilai QoS setelah penerapan filtering port menunjukkan hasil bandwidth 364 Mbits, Jitter 0,022, dan packet loss 0,047. Performansi lebih stabil dan menunjukkan kinerja yang baik pada implementasi filteirng port video streaming. Hasil pengujian kenaikan dan penurunan nilai performansi masih dalam standart rekomendasi ITU-T.
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Muhammad Rifqi Maulana and Abdul Kholiq. "ANALISIS DAN IMPLEMENTASI KEAMANAN JARINGAN MIKROTIK DENGAN METODE IP FILTERING DAN PORT KNOCKIING ( STUDI KASUS BAROKAH.NET )." JURNAL LIMITS 19, no. 02 (2023): 71–80. http://dx.doi.org/10.59134/jlmt.v19i02.199.
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Keamanan jaringan pada server sangat penting, karena server adalah titik utama dalam penyaluran jaringan internet, jika keamanan jaringan lemah maka orang yang tidak berkepentingan dapat dengan mudah melakukan serangan terhadap server, baik untuk mendapatkan internet secara gratis atau merubah sistem pada server. Di Barokah.net sistem keamanan yang digunakan hanya pada login ke akses server dan menggunakan IP Static untuk identitas pada modem client, seiring berjalannya waktu di temukan ip address illegal yang muncul pada daftar IP ARP Mikrotik dan penyerangan menggunakan Brute Force yang terdeteksi pada Log sistem Mikrotik. Berfokus pada masalah tersebut penggunaan metode IP Filtering dan Port Knocking pada server utama merupakan cara yang tepat untuk meningkatkan sistem keamanan jaringan, dimana IP Filtering dan Port Knocking akan memberikan sebuah daftardan autentikasi khusus agar perangkat yang ingin mendapatkan akses ke server dapat di perbolehkan oleh server. Sehingga metode IP Filtering dan Port Knocking dapat meningkatkan keamanan jaringan pada Barokah.net.
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Liu, Yun, Sheng Sun, and Lei Zhu. "Design of n-Way Wideband Filtering Power Dividers With Good Port–Port Isolation." IEEE Transactions on Microwave Theory and Techniques 69, no. 7 (2021): 3298–306. http://dx.doi.org/10.1109/tmtt.2021.3072365.
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Qian, Zhenyao, Yuan Chen, Chunmei Feng, and Wei Wang. "Compact Multi-Mode Filtering Power Divider with High Selectivity, Improved Stopband and In-band Isolation." Applied Computational Electromagnetics Society 35, no. 8 (2020): 936–40. http://dx.doi.org/10.47037/2020.aces.j.350813.
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This letter presents a new compact multi-mode filtering power divider (FPD) design based on co-shared FPD topology with sharp frequency selectivity, improved out-of-band harmonic rejection and port-to-port isolation. Power splitting and quasi-elliptic filtering functions are achieved by masterly integrating only one triple-mode resonator. By loading different open-circuited stubs at the input/output ports, multiple additional transmission zeros (TZs) are generated at both lower and upper stopband, resulting in an improved stopband performance. Meanwhile, a better port-to-port isolation is obtained by adopting frequency-dependent resistor-capacitor parallel isolation network. The proposed multi-mode FPD design stands out from those in the literature by both nice operation performance and compact topology with only one resonator. For demonstration purposes, one triple-mode FPD prototype and its improved one are implemented, respectively. Measured results exhibit the superiority of the FPD design.
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Chen, Xun, Yi Wang, Talal Skaik, and Qingfeng Zhang. "E-Plane Waveguide Filtering Six-Port Junction." IEEE Transactions on Microwave Theory and Techniques 69, no. 12 (2021): 5360–70. http://dx.doi.org/10.1109/tmtt.2021.3120094.
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Cao, Ziheng, Yun Liu, Chen Liang, and Irfan Majid. "Design of UWB Filtering Impedance Transformers and Power Dividers Using Stepped-Impedance Resonators." Electronics 12, no. 13 (2023): 2800. http://dx.doi.org/10.3390/electronics12132800.
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This study presents a novel design of ultra-wideband (UWB) impedance transformers and power dividers with filtering capabilities. Based on the UWB impedance matching network, the UWB filtering impedance transformers are designed, and the UWB filtering power dividers are achieved by impedance transforming one port of one or more impedance transformers. The transformers consist of a multi-mode stepped-impedance resonator (SIR) and defected ground structures (DGSs). The SIR is tightly coupled to two ports of different impedance levels via the unsymmetrical two-sided coupled lines and DGSs. In addition, two transformers that convert impedance from 50 Ω to 100 Ω are connected to form a UWB power divider with filtering function. The 25 Ω port of an impedance transformer with a 50 Ω to 25 Ω conversion is impedance matched to two 50 Ω ports connected in parallel, resulting in another power divider with filtering function. Thus, two prototype UWB impedance transformers from 50 Ω to 100 Ω and from 50 Ω to 25 Ω are designed and their corresponding power dividers are also designed and fabricated. The simulated and measured results are consistent, demonstrating good features, such as return loss greater than 10 dB and insertion loss less than 4.5 dB in the passband, UWB filtering capacity with out-of-band rejection greater than 20 dB, and compact size smaller than 1.2λ × 2.1λ (λ is the wavelength of the central frequency).
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Ando, Ruo, Youki Kadobayashi, Hiroki Takakura, and Hiroshi Itoh. "Understanding Traffic Patterns of Covid-19 IoC in Huge Academic Backbone Network SINET." International Journal of Network Security & Its Applications 13, no. 6 (2021): 23–36. http://dx.doi.org/10.5121/ijnsa.2021.13603.
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Recently, APT (Advanced Persistent Threats) groups are using the COVID-19 pandemic as part of their cyber operations. In response to cyber threat actors, IoCs (Indicators of Compromise) are being provided to help us take some countermeasures. In this paper, we analyse how the coronavirus-based cyber attack unfolded on the academic infrastructure network SINET (The Science Information Network) based on the passive measurement with IoC. SINET is Japan's academic information infrastructure network. To extract and analyze the traffic patterns of the COVID-19 attacker group, we implemented a data flow pipeline for handling huge session traffic data observed on SINET. The data flow pipeline provides three functions: (1) identification the direction of the traffic, (2) filtering the port numbers, and (3) generation of the time series data. From the output of our pipeline, it is clear that the attacker's traffic can be broken down into several patterns. To name a few, we have witnessed (1) huge burstiness (port 25: FTP and high port applications), (3) diurnal patterns (port 443: SSL), and (3) periodic patterns with low amplitude (port 25: SMTP) We can conclude that some unveiled patterns by our pipeline are informative to handling security operations of the academic backbone network. Particularly, we have found burstiness of high port and unknown applications with the number of session data ranging from 10,000 to 35,000. For understanding the traffic patterns on SINET, our data flow pipeline can utilize any IoC based on the list of IP address for traffic ingress/egress identification and port filtering.
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Ruo, Ando, Kadobayashi Youki, Takakura Hiroki, and Itoh Hiroshi. "UNDERSTANDING TRAFFIC PATTERNS OF COVID-19 IOC IN HUGE ACADEMIC BACKBONE NETWORK SINET." International Journal of Network Security & Its Applications (IJNSA) 13, no. 6 (2021): 23–36. https://doi.org/10.5281/zenodo.5771310.
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Recently, APT (Advanced Persistent Threats) groups are using the COVID-19 pandemic as part of their cyber operations. In response to cyber threat actors, IoCs (Indicators of Compromise) are being provided to help us take some countermeasures. In this paper, we analyse how the coronavirus-based cyber attack unfolded on the academic infrastructure network SINET (The Science Information Network) based on the passive measurement with IoC. SINET is Japan's academic information infrastructure network. To extract and analyze the traffic patterns of the COVID-19 attacker group, we implemented a data flow pipeline for handling huge session traffic data observed on SINET. The data flow pipeline provides three functions: (1) identification the direction of the traffic, (2) filtering the port numbers, and (3) generation of the time series data. From the output of our pipeline, it is clear that the attacker's traffic can be broken down into several patterns. To name a few, we have witnessed (1) huge burstiness (port 25: FTP and high port applications), (3) diurnal patterns (port 443: SSL), and (3) periodic patterns with low amplitude (port 25: SMTP) We can conclude that some unveiled patterns by our pipeline are informative to handling security operations of the academic backbone network. Particularly, we have found burstiness of high port and unknown applications with the number of session data ranging from 10,000 to 35,000. For understanding the traffic patterns on SINET, our data flow pipeline can utilize any IoC based on the list of IP address for traffic ingress/egress identification and port filtering.
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Wicaksono, Dwiki. "Firewall Sistem Keamanan Jaringan Menggunakan Firewall dengan Metode Port Blocking dan Firewall Filtering." JATISI (Jurnal Teknik Informatika dan Sistem Informasi) 9, no. 2 (2022): 1380–92. http://dx.doi.org/10.35957/jatisi.v9i2.2103.
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Firewall merupakan bagian penting dalam suatu keamanan jaringan dimana akses lalu lintas internet banyak digunakan dalam dunia pendidikan maupun pekerjaan. Dalam hal ini firewall sangat diperlukan untuk mengatur akses lalu lintas internet agar melindungi system dari ancaman dan serangan dari luar. Penelitian ini membahas tentang sistem keamanan jaringan menggunakan firewall dengan metode port blocking dan firewall filtering. Penelitian ini menggunakan router Mikrotik dan aplikasi Winbox meremote router untuk membuat rule firewall. Rule firewall berisi blocking port komunikasi yang rawan terhadap serangan virus dan malware, dan pembatasan akses lalu lintas internet menggunakan web proxy dengan memblock situs http dan https dalam suatu jaringan. Hasil penelitian ini diuji menggunakan aplikasi Nmap untuk melihat sisa port komunikasi yang terbuka dan menggunakan browser untuk mengakses web situs yang dialihkan dan di block. Dengan memaksimalkan dan mengoptimalkan kinerja firewall sebuah jaringan internet akan lebih aman dan meminimalisir ancaman serangan dari luar.
Dissertations / Theses on the topic "Port filtering"
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Holmeide, Ø., and J.-F. Gauvin. "Ethernet Packet Filtering for FTI - Part II." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577404.
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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA<br>Network loads close to Ethernet wire speed and latency sensitive data in a Flight Test Instrumentation (FTI) system, represent challenging requirements for FTI network equipment. Loss of data due to network congestion, overflow on the end nodes, as well as packet latency above a few hundred microseconds, can be critical during a flight test. To avoid these problems, several advanced packet filtering and network optimization functions are required in order to achieve best possible performance and thus avoid loss of data. This paper gives insight into how to properly engineer an Ethernet based FTI network and how to use advanced Ethernet switch techniques such as Quality of Service (QoS) and rate shaping.
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Fortuna, Filipe André Cancela. "Collaborative Filtering para recomendação de produtos on-line." Master's thesis, Faculdade de Economia da Universidade do Porto, 2008. http://hdl.handle.net/10216/53871.
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Fortuna, Filipe André Cancela. "Collaborative Filtering para recomendação de produtos on-line." Dissertação, Faculdade de Economia da Universidade do Porto, 2008. http://hdl.handle.net/10216/53871.
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Faber, Marc. "On-Board Data Processing and Filtering." International Foundation for Telemetering, 2015. http://hdl.handle.net/10150/596433.
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ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NV<br>One of the requirements resulting from mounting pressure on flight test schedules is the reduction of time needed for data analysis, in pursuit of shorter test cycles. This requirement has ramifications such as the demand for record and processing of not just raw measurement data but also of data converted to engineering units in real time, as well as for an optimized use of the bandwidth available for telemetry downlink and ultimately for shortening the duration of procedures intended to disseminate pre-selected recorded data among different analysis groups on ground. A promising way to successfully address these needs consists in implementing more CPU-intelligence and processing power directly on the on-board flight test equipment. This provides the ability to process complex data in real time. For instance, data acquired at different hardware interfaces (which may be compliant with different standards) can be directly converted to more easy-to-handle engineering units. This leads to a faster extraction and analysis of the actual data contents of the on-board signals and busses. Another central goal is the efficient use of the available bandwidth for telemetry. Real-time data reduction via intelligent filtering is one approach to achieve this challenging objective. The data filtering process should be performed simultaneously on an all-data-capture recording and the user should be able to easily select the interesting data without building PCM formats on board nor to carry out decommutation on ground. This data selection should be as easy as possible for the user, and the on-board FTI devices should generate a seamless and transparent data transmission, making a quick data analysis viable. On-board data processing and filtering has the potential to become the future main path to handle the challenge of FTI data acquisition and analysis in a more comfortable and effective way.
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Cantarello, Luca. "Use of a Kalman filtering technique for near-surface temperature analysis." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13455/.
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A statistical post-processing of the hourly 2-meter temperature fields from the Nordic convective-scale operational Numerical Weather Prediction model Arome MetCoOp 2.5 Km has been developed and tested at the Norwegian Meteorological Institute (MET Norway). The objective of the work is to improve the representation of the temperature close to the surface combining model data and in-situ observations for climatological and hydrological applications.
In particular, a statistical scheme based on a bias-aware Local Ensemble Transform Kalman Filter has been adapted to the spatial interpolation of surface temperature. This scheme starts from an ensemble of 2-meter temperature fields derived from Arome MetCoOp 2.5 Km and, taking into account the observations provided by the MET Norway network, produces an ensemble of analysis fields characterised by a grid spacing of 1 km. The model best estimate employed in the interpolation procedure is given by the latest avilable forecast, subsequently corrected for the model bias. The scheme has been applied off-line and the final analysis is performed independently at each grid point.
The final analysis ensemble has been evaluated and its mean value has been proved to improve significantly the best estimate of Arome MetCoOp 2.5 km in representing the 2-meter temperature fields, in terms of both accuracy and precision, with a reduction in the root mean squared values as well as in the bias and an improvement in reproducing the cold extremes during wintertime. More generally, the analysis ensemble displays better forecast verification scores, with an overall reduction in the Brier Score and its reliability component and an increase in the resolution term for the zero degrees threshold. However, the final ensemble spread remains too narrow, though not as narrow as the model output.
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Garcia, Krystine. "Bioinformatics Pipeline for Improving Identification of Modified Proteins by Neutral Loss Peak Filtering." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1440157843.
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PEIREIRA, Alysson Bispo. "Sistemas de recomendação baseados em contexto físico e social." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/19521.
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Previous issue date: 2016-06-29<br>Em meio a grande sobrecarga de dados disponíveis na internet, sistemas de recomendação tornam-se ferramentas indispensáveis para auxiliar usuários no encontro de itens ou conteúdos relevantes. Diversas técnicas de recomendação são aplicadas em diversos tipos de domínios diferentes. Seja na recomendação de filmes, música, amigos, lugares ou notícias, sistemas de recomendação exploram diversas informações disponíveis para aprender as preferências dos usuários e promover recomendações úteis. Uma das estratégias mais utilizadas é a de filtragem colaborativa. A qualidade dessa estratégia depende da quantidade de avaliações disponíveis e da qualidade do algoritmo utilizado para predição de avaliação. Estudos recentes demonstram que informações provenientes de redes sociais podem ser muito úteis para aumentar a precisão das recomendações. Assim como acontece no mundo real, no mundo virtual usuários buscam recomendações e conselhos de amigos antes de comprar um item ou consumir algum serviço, informações desse tipo podem ser úteis para definição do contexto social da recomendação. Além do social, informações físicas e temporais passaram a ser utilizadas para definição do contexto físico de cada recomendação. A companhia, a localização e as condições climáticas são bons exemplos de elementos físicos que levam um usuário a preferir certos itens. Um processo de recomendação que não leve em consideração elementos contextuais pode fazer com que o usuário tenha uma péssima experiência consumindo determina do item recomendado equivocadamente. Esta dissertação tem como objetivo investigar técnicas de filtragem colaborativa que utilizam contexto a fim de realizar recomendações que auxiliem usuários no encontro de itens relevantes. Nesse tipo de técnica, um sistema de recomendação base é utilizando para fornecer recomendações para o usuário alvo. Em seguida, são filtrados apenas os itens considerados relevantes para contextos previamente identificados nas preferências do usuário alvo. As técnicas implementadas foram aplicadas em dois experimentos com duas bases de dados de domínios diferentes: uma base composta por eventos e outra por filmes. Na recomendação de eventos, investigamos o uso de contextos físicos (i.e., tempo e local) e de contextos sociais (i.e., amigos na rede social) associados aos itens sugeridos aos usuários. Na recomendação de filmes, por sua vez, investigamos novamente o uso de contexto social. A partir da aplicação de pós-filtragem em três algoritmos de filtragem colaborativa usados como base, foi possível recomendar itens de forma mais precisa, como demonstrado nos experimentos realizados.<br>The overload of data available on the internet makes recommendation systems become indispensable tools to assist users in meeting items or relevant content. Several recommendation techniques were has been userd in many different types of domains. Those systems can recommend movies, music, friends, places or news; recommender systems can exploit different information available to learn preferences of users and promote more useful recommendations. The collaborative filtering strategy is one of the most used. The quality of this technique depends on the number of available ratings and the algorithm used to predict. Recent studies show that information from social networks can be very useful to increase the accuracy recommendations. Just as in the real world, the virtual world users ask recommendations and advice from friends before buying an item or consume a service. Furthermore, the context of each rating may be crucial for the definition of new ratings. Location, date time and weather conditions are good examples of useful elements to define what should be the best items to recommend for some user. A recommendation process that does not respect those elements can provide a user a bad experience. This dissertation investigates collaborative filtering techniques based on context, and more specifically techniques based on post-filtering. First, a recommendation system was used to provide recommendations for a specific user. Then, only relevant items according to context preferences for the target user will be recommended. The techniques implemented was applied in two case studies with two different domains databases: one base composed of events and another of movies. In the event of recommendation, we investigated the use of physical contexts (i.e., time and place) and social contexts (i.e., friends in the social network) associated with items suggested to users. On the recommendation of movies, in turn, again we investigated the use of social context. From the application of post-filtering in three collaborative filtering algorithms used as a baseline, it was possible to recommend items more accurately, as demonstrated in the experiments.
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Hultén, Peter. "Managing a cross-institutional setting : a case study of a Western firm's subsidiary in the Ukraine." Doctoral thesis, Umeå universitet, Företagsekonomi, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-67937.
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This study explores the development of a Western firm's subsidiary in the Ukraine and sets out to contribute to the theoretical development about the managing of subsidiaries in the Post-Soviet market. The cross-institutional approach to analyse the subsidiary has been adopted to explore influence from the institutional setting of the parent firm and from local institutions. In the theoretical framework, special attention is directed to studies analysing the challenges that Western firms encounter when operating in the Post-Soviet market. Institutional theory therefore serves as a framework for theories on market entries, networks and management transfers.The empirical study is based on a case study conducted in connection to a training project for local employees of a Western firm's subsidiary operating in the Ukraine. Besides being a source of inspiration, the training project provided good access to respondents and insights about the challenges that the subsidiary faced.The analysis shows that the introduction of the Western firm's management in the subsidiary reflects in the local employees' forming of identities. A clear pattern is that local employees' development of identities in line with the Western firm's norms is supported by socialisation in settings dominated by the Western firm. A setting dominated by conflicts between Western and local norms, in contrast, resulted in developments of conflict identities. The analysis of the subsidiary's managing of influences from the local institutional setting indicates that this concerned filtering. Striking was that the subsidiary was successful in managing influences when the filtering conditions were characterised by consonance. Looking into aspects making the filtering of external influences difficult, the analysis points out barter trade and local actors' boundary spanning towards authorities in the Ukrainian society as aspects creating dissonances and vacuum. Thus, influences characterised by dissonance and/or vacuum made it particularly difficult for the subsidiary to manage these influences.One of the major contributions of this thesis is the cross-institutional approach to analyse developments in a subsidiary in the Post-Soviet market. By applying this approach the study suggests that the managing of a cross-institutional setting concerns both internal and external boundary spanning. Of vital importance for the internal boundary spanning are issues influencing local employees' forming of a 'we' with the Western firm's representatives. The standpoint is that this concerns local employees' identity identification, which is a new perspective on management transfers towards a subsidiary in the Post-Soviet market. Concerning the managing of external boundary spanning, the study points towards the importance of observing local actors' ways of dealing with dissonances and vacuum in local networks.<br>digitalisering@umu
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Roohi, Milad. "Performance-Based Seismic Monitoring of Instrumented Buildings." ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1140.
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This dissertation develops a new concept for performance-based monitoring (PBM) of instrumented buildings subjected to earthquakes. This concept is achieved by simultaneously combining and advancing existing knowledge from structural mechanics, signal processing, and performance-based earthquake engineering paradigms. The PBM concept consists of 1) optimal sensor placement, 2) dynamic response reconstruction, 3) damage estimation, and 4) loss analysis. Within the proposed concept, the main theoretical contribution is the derivation of a nonlinear model-based observer (NMBO) for state estimation in nonlinear structural systems. The NMBO employs an efficient iterative algorithm to combine a nonlinear model and limited noise-contaminated response measurements to estimate the complete nonlinear dynamic response of the structural system of interest, in the particular case of this research, a building subject to an earthquake. The main advantage of the proposed observer over existing nonlinear recursive state estimators is that it is specifically designed to be physically realizable as a nonlinear structural model. This results in many desirable properties, such as improved stability and efficiency.
Additionally, a practical methodology is presented to implement the proposed PBM concept in the case of instrumented steel, wood-frame, and reinforced concrete buildings as the three main types of structural systems used for construction in the United States. The proposed methodology is validated using three case studies of experimental and real-world large-scale instrumented buildings. The first case study is an extensively instrumented six-story wood frame building tested in a series of full-scale seismic tests in the final phase of the NEESWood project at the E-Defense facility in Japan. The second case study is a 6-story steel moment resisting frame building located in Burbank, CA, and uses the recorded acceleration data from the 1991 Sierra Madre and 1994 Northridge earthquakes. The third case is a seven-story reinforced concrete structure in Van Nuys, CA, which was severely damaged during the 1994 Northridge earthquake.
The results presented in this dissertation constitute the most accurate and the highest resolution seismic response and damage measure estimates obtained for instrumented buildings. The proposed PBM concept will help structural engineers make more informed and swift decisions regarding post-earthquake assessment of critical instrumented building structures, thus improving earthquake resiliency of seismic-prone communities.
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Korogui, Rubens Hideo. "Filtragem robusta, modelos com atraso e certificação de desempenho : aplicação em sistemas eletricos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260897.
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Orientador: Jose Claudio Geromel<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-13T09:58:44Z (GMT). No. of bitstreams: 1
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Previous issue date: 2009<br>Resumo: Uma das temáticas abordadas neste trabalho é o problema de filtragem robusta em norma H2 para sistemas lineares a tempo contínuo e a tempo discreto. Consideramos que os sistemas estão sujeitos a incertezas paramétricas inicialmente do tipo politópicas e, em seguida, do tipo que admite representação linear fracionária. Calculamos limitantes inferior e superior para a norma H2 do erro de estimação, resolvendo-se problemas minimax, escrevendo-os em formato de desigualdades matriciais lineares LMI. Dessa maneira calculamos um intervalo de otimalidade que permite certificar o desempenho do filtro robusto projetado. Em seguida, aplicamos a metodologia proposta em problemas de estimação envolvendo um motor de indução trifásico e uma linha de transmissão com derivação. O presente trabalho também apresenta o que chamamos de sistema linear de comparação, cuja proposta é servir como alternativa para estudar sistemas com atraso. Utilizando a substituição de Rekasius construímos um sistema linear invariante no tempo que permite obter informações sobre a estabilidade e o cálculo de norma H8 para sistemas desta classe. Em vista da formulação através de matrizes de representação de estado é possível estender sem maiores dificuldades os resultados para o projeto de controladores via realimentação de estado e de filtros para sistemas com atraso.<br>Abstract: One of the themes considered in this work is the robust H2 filtering design problem for linear time invariant continuous and discrete time systems. We assume that the systems are subject to parametric uncertainty, initially of the polytopic type and later as linear fractional transformation parametric uncertainties. We calculate lower and upper bounds to the H2 squared norm of the estimation error by means of the equilibrium solution of a minimax problem, that can be formulated in a linear matrix inequality framework. Under this approach we provide an optimality gap that allows us to certify the performance of the designed robust filter. Afterwards, we apply the proposed methodology to estimation problems involving a three-phase induction motor and a transmission line with a stub. This work also considers what we call a linear comparison system, whose goal is to serve as an alternative to study time-delay systems. Using the Rekasius substitution we construct a linear time invariant system that allows us to get information about stability and H8 norm of this class of systems. Based on this approach in terms of state space matrices it is possible to extend the results to state feedback design and filtering design without any further assumptions.<br>Doutorado<br>Automação<br>Mestre em Engenharia Elétrica
Books on the topic "Port filtering"
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Witte, Robert A. Spectrum and Network Measurements. SciTech Publishing, Incorporated, 2014.
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Llewellyn, Dawn. ‘But I Still Read The Bible!’. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198722618.003.0032.
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While it might be assumed that post-Christian women have rejected the sacred texts of Christianity, this chapter highlights their continued use of the Bible to resource their spiritual lives, and in doing so raises two questions for gendered religious reading practices. First, post-Christian women’s biblicalism crosses the distinction between sacred and secular literatures, and reading processes sometimes made in religious feminisms. Second, despite the emphasis on ‘women’s experience’, feminist theology has focused on the text to the extent that actual readers and their spiritual reading practices are often overlooked. Yet, qualitatively interviewing post-Christian women reveals the biblical reading and the ‘filtering’ strategies they employ to monitor their use of the Bile. This questions the assumption that women who use literature as a spiritual resource are doing so because they have found the Christian testaments lacking in opportunities to access the divine and have therefore excluded them from their personal collections of spiritual texts. While post-Christian women readers in this study are critical of scripture and question its relevancy, they are still reading the Bible.
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Zhiming, Bao. The Systemic Nature of Substratum Transfer. Edited by Markku Filppula, Juhani Klemola, and Devyani Sharma. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199777716.013.024.
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This chapter discusses four grammatical systems in Singapore English that are transferred from Chinese: aspect, pragmatic particles, topicalization, and quantification. Proper analysis of the relevant substrate features reveals extensive clustering: features which form a grammatical system transfer together. Substratum transfer targets the grammatical system, and the transferred system is then exponenced with suitable morphosyntactic materials from the lexifier, filtering out those component features for which the lexifier has no well-formed morphosyntactic exponent. The analysis of the four systems shows that post-transfer stabilization is subject to the normative effect of English. It is argued that data obtained through introspection and corpora are complementary, and substrate-induced grammatical change is best accounted for in a usage-based model that uses the two types of data.
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van, José. News. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190889760.003.0004.
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This chapter examines how the advent of data-driven publishers, such as BuzzFeed and the Huffington Post, as well as the rise of the Big Five platforms, have shaken the news sector’s economic, technical, and social foundations. The proliferation of online audience metrics and algorithmic filtering, promoting the personalization of news and advertisements, has fundamentally transformed how news is produced, circulated, and monetized. The triangular content–audiences–advertising configuration that constituted the legacy news industry is unbundled and rebundled through online platforms. As a consequence, the professional practices and institutional standards once set by legacy news organizations are seriously challenged. Key public values, such as journalistic independence and the trustworthiness of news, have come under scrutiny as new online players in this sector reconfigure the conditions of production and distribution.
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Guss-West, Clare. Attention and Focus in Dance. Human Kinetics, 2021. http://dx.doi.org/10.5040/9781718212718.
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The Western approach to dance is largely focused on control and mastery of technique, both of which are certainly necessary skills for improving performance. But mindful attention, despite its critical role in high performance, has gotten short shrift—until now. Attention and Focus in Dance, a how-to book rooted in the 20 years of attentional focus findings of researcher Gabriele Wulf, will help dancers unlock their power and stamina reserves, enabling efficient movement, heightening their sensory perception and releasing their dance potential. Author Clare Guss-West—a professional dancer, choreographer, teacher and holistic practitioner—presents a systematic, science-based approach to the mental work of dance. Her approach helps dancers hone the skills of attention, focus and self-cueing to replenish energy and enhance their physical and artistic performance. A Unique, Research-Based Approach Here is what Attention and Focus in Dance offers readers: • A unique approach, connecting the foundations of Eastern movement with Western movement forms • Research-based teaching practices in diverse contexts, including professional dance companies, private studios, and programmes for dancers with special needs or movement challenges • Testimonies and tips from international professional dancers and dance educators who use the book's approach in their training and teaching • A dance-centric focus that can be easily integrated into existing training and teaching practice, in rehearsal, or in rehabilitation contexts to provide immediate and long-term benefits Guss-West explores attentional focus techniques for dancers, teachers and dance health care practitioners, making practical connections between research, movement theory and day-to-day dance practice. “Many dancers are using excessive energy deployment and significant counterproductive effort, and that can lead to a global movement dysfunction, lack of stamina and an increased risk of injury,” says Guss-West. “Attentional focus training is the most relevant study that sport science and Eastern-movement practice can bring to dance.” Book Organisation The text is organised into two parts. Part I guides dancers in looking at the attentional challenges and information overload that many professional dancers suffer from. It outlines the need for a systematic attention and focus strategy, and it explains how scientific research on attentional focus relates to dance practice. This part also examines the ways in which Eastern-movement principles intersect with and complement scientific findings, and it examines how the Eastern and scientific concepts can breathe new life into basic dance elements such as posture, turnout and port de bras. Attention and focus techniques are included for replenishing energy and protecting against energy depletion and exhaustion. Part II presents attention and focus strategies for teaching, self-coaching and cueing. It addresses attentional focus cues for beginners and for more advanced dancers and professionals, and it places attentional focus in the broader context of holistic teaching strategies. Maximising Dance Potential “Whether cueing others or yourself, cueing for high performance is an art,” Guss-West says. “Readers will discover how to format cues and feedback to facilitate effective neuromuscular response and enhance dancer recall of information and accessibility while dancing.” Attention and Focus in Dance offers an abundance of research-backed concepts and inspirational ideas that can help dancers in their learning and performance. This book aids readers in filtering information and directing their focus for optimal physical effect. Ultimately, it guides dancers and teachers in being the best version of themselves and maximising their potential in dance.
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Vuorinen, Ilppo. Post-Glacial Baltic Sea Ecosystems. Oxford University Press, 2018. http://dx.doi.org/10.1093/acrefore/9780190228620.013.675.
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Post-glacial aquatic ecosystems in Eurasia and North America, such as the Baltic Sea, evolved in the freshwater, brackish, and marine environments that fringed the melting glaciers. Warming of the climate initiated sea level and land rise and subsequent changes in aquatic ecosystems. Seminal ideas on ancient developing ecosystems were based on findings in Swedish large lakes of species that had arrived there from adjacent glacial freshwater or marine environments and established populations which have survived up to the present day. An ecosystem of the first freshwater stage, the Baltic Ice Lake initially consisted of ice-associated biota. Subsequent aquatic environments, the Yoldia Sea, the Ancylus Lake, the Litorina Sea, and the Mya Sea, are all named after mollusc trace fossils. These often convey information on the geologic period in question and indicate some physical and chemical characteristics of their environment. The ecosystems of various Baltic Sea stages are regulated primarily by temperature and freshwater runoff (which affects directly and indirectly both salinity and nutrient concentrations). Key ecological environmental factors, such as temperature, salinity, and nutrient levels, not only change seasonally but are also subject to long-term changes (due to astronomical factors) and shorter disturbances, for example, a warm period that essentially formed the Yoldia Sea, and more recently the “Little Ice Age” (which terminated the Viking settlement in Iceland).There is no direct way to study the post-Holocene Baltic Sea stages, but findings in geological samples of ecological keystone species (which may form a physical environment for other species to dwell in and/or largely determine the function of an ecosystem) can indicate ancient large-scale ecosystem features and changes. Such changes have included, for example, development of an initially turbid glacial meltwater to clearer water with increasing primary production (enhanced also by warmer temperatures), eventually leading to self-shading and other consequences of anthropogenic eutrophication (nutrient-rich conditions). Furthermore, the development in the last century from oligotrophic (nutrient-poor) to eutrophic conditions also included shifts between the grazing chain (which include large predators, e.g., piscivorous fish, mammals, and birds at the top of the food chain) and the microbial loop (filtering top predators such as jellyfish). Another large-scale change has been a succession from low (freshwater glacier lake) biodiversity to increased (brackish and marine) biodiversity. The present-day Baltic Sea ecosystem is a direct descendant of the more marine Litorina Sea, which marks the beginning of the transition from a primeval ecosystem to one regulated by humans. The recent Baltic Sea is characterized by high concentrations of pollutants and nutrients, a shift from perennial to annual macrophytes (and more rapid nutrient cycling), and an increasing rate of invasion by non-native species. Thus, an increasing pace of anthropogenic ecological change has been a prominent trend in the Baltic Sea ecosystem since the Ancylus Lake.Future development is in the first place dependent on regional factors, such as salinity, which is regulated by sea and land level changes and the climate, and runoff, which controls both salinity and the leaching of nutrients to the sea. However, uncertainties abound, for example the future development of the Gulf Stream and its associated westerly winds, which support the sub-boreal ecosystems, both terrestrial and aquatic, in the Baltic Sea area. Thus, extensive sophisticated, cross-disciplinary modeling is needed to foresee whether the Baltic Sea will develop toward a freshwater or marine ecosystem, set in a sub-boreal, boreal, or arctic climate.
Book chapters on the topic "Port filtering"
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Jörgens, Daniel, Maxime Descoteaux, and Rodrigo Moreno. "Challenges for Tractogram Filtering." In Mathematics and Visualization. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-56215-1_7.
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AbstractTractography aims at describing the most likely neural fiber paths in white matter. A general issue of current tractography methods is their large false-positive rate. An approach to deal with this problem is tractogram filtering in which anatomically implausible streamlines are discarded as a post-processing step after tractography. In this chapter, we review the main approaches and methods from literature that are relevant for the application of tractogram filtering. Moreover, we give a perspective on the central challenges for the development of new methods, including modern machine learning techniques, in this field in the next few years.
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Ogbodo, Eugene A. "Implementations of ACJ Technique in Different Four-Port Filter Networks." In Handbook of Research on 5G Networks and Advancements in Computing, Electronics, and Electrical Engineering. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-6992-4.ch011.
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This chapter proposes the use of asynchronously coupled-resonator junctions (ACJ) in the design of a multi-input multi-output (MIMO) filtering network and a masthead combiner (MHC). By employing the resonator junctions, miniaturised circuits are achieved without using any transmission-line-based impedance matching circuits. The main challenge in the designs is the control and implementation of the external couplings at the common ports of this all-resonator-based MIMO filtering network and MHC. Both devices are four ports-based with the MIMO filtering network operating at 1.8, 2.1, and 2.6 GHz, while the MHC operates at the two channels of 1.8 and 2.1 GHz. The demonstrated designs achieved fractional bandwidths of 1.764 GHz to 1.836 GHz, 2.058 GHz to 2.142 GHz, and 2.548 GHz to 2.652 GHz, respectively. Good agreements have been achieved between the measurements of the prototype devices and the simulations.
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Francis, Brian A. "Complications Specifically Related to Trabectome® Surgery (Trabeculotomy Internal Approach)." In Complications of Glaucoma Surgery. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780195382365.003.0074.
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Current surgical therapy for open-angle glaucoma can be divided into procedures directed at decreasing aqueous inflow (such as cyclophotocoagulation) or increasing aqueous outflow. The latter group can be further subdivided into external filtering surgery (such as trabeculectomy and aqueous tube shunt implantation) and internal filtering surgery designed to enhance existing aqueous outflow pathways. Internal approaches provide an alternative to standard external filtering surgery and possibly reduce the complications, including hypotony, hypotony maculopathy, bleb leaks, blebitis, choroidal effusion and hemorrhage, bleb-related endophthalmitis, peripheral anterior synechiae (PAS) formation, posterior synechiae, cataract formation, diplopia, tube obstruction, conjunctival erosion, tube migration, corneal decompensation, and plate encapsulation. Anterior chamber angle surgery techniques include procedures performed by an internal approach (e.g., goniotomy, Trabectome® [NeoMedix Corporation, Tustin, California], trabecular stent [iStent®; Glaukos® Corp., Laguna Hills, California], excimer laser trabeculotomy) or by an external approach (e.g., canaloplasty [see Chapter 51] and viscocanalostomy). Trabeculotomy by internal approach with the Trabectome® is designed to create a direct pathway from the anterior chamber to Schlemm’s canal (SC) and the aqueous collector channels by using electrocautery to selectively ablate a portion of trabecular meshwork (TM) tissue and the inner wall of SC in order to increase aqueous outflow. The Trabectome® surgical device received FDA approval for clinical use in 2004. The system consists of 3 major components: a mobile stand with a gravity-fed bottle of balanced salt solution; a handpiece console with automated irrigation, aspiration, and microbipolar electrocautery; and a foot pedal to control these functions. The intraocular disposable handpiece (see Figure 50.1) tip contains a 19.5-gauge infusion sleeve and a 25-gauge irrigation and aspiration (I/A) port with a coupling for the ablation unit at the tip. The instrument incorporates a specially designed insulated triangular footplate that is bent at 90° at the end and is pointed in order to allow proper insertion through the TM into SC. The insulation on the footplate is made of a multilayered polymer coating that allows the instrument to glide along within the canal and protects the outer wall of SC from thermal and electrical injury.
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Scarpiniti Michele, Bunkheila Gabriele, Parisi Raffaele, and Uncini Aurelio. "A Pre-Filtering and Post-Filtering Approach to Blind Source Separation." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2011. https://doi.org/10.3233/978-1-60750-692-8-89.
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In this paper a pre-filtering and a post-filtering approach to blind source separation in reverberant environment is presented. The preprocessing consists in the use of common acoustical poles that can simplify the recovering network, giving some a priori information on the environment. In particular the autoregressive part of a transfer function in a closed environment is common for all positions. After pre-filtering conventional BSS algorithm in frequency domain is applied to get estimates of original sources. In addition an adaptive noise canceler is used as post-filter in order to enhance the quality of the separation. Some experimental results demonstrate the effectiveness of the proposed approach.
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Arma, Gennaro, and Angela Denise Peri. "The Inside Story of COVID-19 Pandemic on the Diamond Princess as the prime mover of Present and Future Ship Design." In Progress in Marine Science and Technology. IOS Press, 2022. http://dx.doi.org/10.3233/pmst220071.
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“…But this coronavirus has forced us into a new framework, within which we move without any ease: everything has new ways, everything appears as never seen, it’s like finding yourself in an uncharted territory…” (G. Arma, 2020) With these words Gennaro Arma, Captain of the Diamond Princess cruise ship, describes the very first moments following the detection of what would become the first recorded outbreak of Covid-19 outside of China. It occurred during a roundtrip cruise which departed from Yokohama port, in Japan, on 20 January 2020. Among the 3,700 people on board, more than 700 tested positive for the virus, 14 of whom died during hospitalization. A situation which was faced without the support of emergency protocols that contemplated a modus operandi to follow. The ship constituted a confined control volume which allowed to analyze the main routes of virus propagation that mainly occur through direct contact between individuals, indirect one via contaminated objects and surfaces (also referred to as fomites) and airborne transmission. This has greatly affected the overall design paradigm, especially concerning the safety levels to be assured on board. The paper is going to analyze these focal points, starting from a possible implementation of HVAC system. It comes after an extensive study of the air flow circulation, as well as the application of filtering and purifications solutions, considering ship age and ventilation type, assessing the possibility of isolating those sectors of the plant acting on some areas dedicated to the management of emergency situations. Synoptically, there will be an extensive analysis related to the different surface types present on board and possible design interventions (i.e. smart materials). The Diamond Princess experience represents the prime mover aimed at the world of scientific research at the formulation of design guidelines applicable to the world of cruise ships and, consequently, in the civil architecture field. The outcome results have helped to build a transversal, holistic know-how, thanks to which it will be possible to control the occurrence of future pandemic episodes.
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Ben Kharrat, Firas, Aymen Elkhleifi, and Rim Faiz. "Improving Collaborative Filtering Algorithms." In Natural Language Processing. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0951-7.ch031.
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This paper puts forward a new recommendation algorithm based on semantic analysis as well as new measurements. Like Facebook, Social network is considered as one of the most well-prominent Web 2.0 applications and relevant services elaborating into functional ways for sharing opinions. Thereupon, social network web sites have since become valuable data sources for opinion mining. This paper proposes to introduce an external resource a sentiment from comments posted by users in order to anticipate recommendation and also to lessen the cold-start problem. The originality of the suggested approach means that posts are not merely characterized by an opinion score, but receive an opinion grade notion in the post instead. In general, the authors' approach has been implemented with Java and Lenskit framework. The study resulted in two real data sets, namely MovieLens and TripAdvisor, in which the authors have shown positive results. They compared their algorithm to SVD and Slope One algorithms. They have fulfilled an amelioration of 10% in precision and recall along with an improvement of 12% in RMSE and nDCG.
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Choi, Ryan, and Raymond Wong. "Scalable XML Filtering for Content Subscriptions." In Theoretical and Practical Advances in Information Systems Development. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-521-6.ch007.
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Over the past few years, there have been an increasing number of Web applications that exchange various types of data on the Internet. In this article, we propose a technique for building efficient and scalable XML publish/subscribe applications. In particular, we look at the problem of processing streaming XML data efficiently against a large number of branch XPath queries. To improve the performance of XML data processing, the branch queries that have similar query characteristics are grouped, and common paths between the queries in the same group are identified. Then, these groups of queries are processed against an XML schema to validate query structures. After performing structural matching of queries, the queries are organized in a way that multiple queries can be evaluated simultaneously in the post-processing phase. In the post-processing phase, join operations are executed in a pipeline fashion, and intermediate join results are shared amongst the queries in the same group. The benefit of this approach is that, the total number of join operations performed in the post-processing phase is significantly reduced. In addition, we also present how to efficiently return all matching elements for each matching branch query. Experiments show that our proposal is efficient and scalable compared to previous works.
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Chun, Marvin M., and Steven B. Most. "External Attention." In Cognition. Oxford University Press, 2021. https://doi.org/10.1093/hesc/9780199950638.003.0004.
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This chapter delves into the complex nature of attention, explaining it as a collection of cognitive mechanisms that enable individuals to focus on relevant stimuli while filtering out the irrelevant. A core function, selection allows the prioritisation of certain information, influenced by factors such as spatial attention, temporal attention, or feature-based attention. Debates on whether attention operates early (filtering by physical traits) or late (post-meaning processing) highlight the flexibility of selection depending on cognitive demands. Attention also modulates perception, enhancing sensory sensitivity and sustaining vigilance for tasks requiring prolonged focus. Lastly, while attention shapes awareness, control over it is limited by reflexive shifts, prior learning, and emotional biases, raising questions about the extent of autonomy in directing mental focus.
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Pasquier, Nicolas. "Frequent Closed Itemsets Based Condensed Representations for Association Rules." In Post-Mining of Association Rules. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-404-0.ch013.
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After more than one decade of researches on association rule mining, efficient and scalable techniques for the discovery of relevant association rules from large high-dimensional datasets are now available. Most initial studies have focused on the development of theoretical frameworks and efficient algorithms and data structures for association rule mining. However, many applications of association rules to data from different domains have shown that techniques for filtering irrelevant and useless association rules are required to simplify their interpretation by the end-user. Solutions proposed to address this problem can be classified in four main trends: constraint-based mining, interestingness measures, association rule structure analysis, and condensed representations. This chapter focuses on condensed representations that are characterized in the frequent closed itemset framework to expose their advantages and drawbacks.
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Powers, James D., Mikito Kitayama, and Andreas M. Glaeser. "Fundamental Studies of Surfaces and Interfaces at High Temperature Via Microdesigned Interfaces." In Computer-Aided Design of High-Temperature Materials. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195120509.003.0022.
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Abstract At elevated temperatures, the microscopic structure of the compact, and thus, of the pore network, changes. Solid-solid interfaces (grain boundaries) develop at interparticle contact points. Concurrently, the specific surface area changes. Voids (pores) can either change shape or be eliminated. If a porous end product suitable for filtering, sensor, or catalytic applications is desired, then it is essential that pore network connectivity be maintained, and that the proper geometric characteristics, e.g., pore channel size and size distribution, are retained or developed. If the application demands a dense product with controlled grain size, then it is essential that localized closure of the pore network occurs, the isolated pores shrink, the compact density increases, and that grain boundary migration is controlled.
Conference papers on the topic "Port filtering"
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Kumar, Abhishek, Jitendra Ahir, and Sanjeev Kumar Gupta. "Circularly Polarized Two-Port Dielectric Resonator Based Filtering Antenna for mm-wave 5G Communication System." In 2024 5th International Conference on Smart Electronics and Communication (ICOSEC). IEEE, 2024. http://dx.doi.org/10.1109/icosec61587.2024.10722483.
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Vidal-Moreno, Pedro J., María R. Fernández-Ruiz, Hugo Martins, Sonia Martin-Lopez та Miguel Gonzalez-Herraez. "Frequency-Time 2D Matched Filter to reduce calibration time in Multifrequency Database CP-ΦOTDR". У Optical Sensors. Optica Publishing Group, 2024. https://doi.org/10.1364/sensors.2024.stu3c.5.
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Specific post-processing strategies allow to reduce calibration time in Multi-Frequency Database Demodulation CP-ΦOTDR systems. Calibration time has been reduced by a factor of 1000 times by utilizing a novel 2D filtering method, unlocking real-world applicability.
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Yang, Jiale, Gongan Qiu, and Jin Shi. "Multi-port Filtering Power Dividing Networks." In 2019 IEEE MTT-S International Wireless Symposium (IWS). IEEE, 2019. http://dx.doi.org/10.1109/ieee-iws.2019.8803976.
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Zhang, Feng, Xiangzhi Liu, and Xiaoming Wu. "A Serial Port Data Filtering System." In 2021 IEEE 5th Information Technology,Networking,Electronic and Automation Control Conference (ITNEC). IEEE, 2021. http://dx.doi.org/10.1109/itnec52019.2021.9586955.
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Fahmi, Mohamed M., Ali E. Atia, and Raafat R. Mansour. "Systematic Synthesis of Synchronous Four Port Filtering Couplers." In 2024 IEEE International Microwave Filter Workshop (IMFW). IEEE, 2024. http://dx.doi.org/10.1109/imfw59690.2024.10477137.
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Liu, Shuxuan, and Yuandan Dong. "Planar SIW-Based Dual-Polarized Filtering Antenna with High Port Isolation." In 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/USNC-URSI). IEEE, 2022. http://dx.doi.org/10.1109/ap-s/usnc-ursi47032.2022.9886449.
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Jiang, Pengchun, Zengshan Tian, Mu Zhou, and Zhihao Li. "LTE Antenna Port Number Detection Algorithm Based on Kalman Autoregression Filtering." In 12th EAI International Conference on Mobile Multimedia Communications, Mobimedia 2019, 29th - 30th Jun 2019, Weihai, China. EAI, 2019. http://dx.doi.org/10.4108/eai.29-6-2019.2282056.
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Petrzela, Jiri. "Simple Chaotic Oscillator with Filtering Passive Two-Port Having Fractional-Order Segments." In 2019 MIXDES - 26th International Conference "Mixed Design of Integrated Circuits and Systems". IEEE, 2019. http://dx.doi.org/10.23919/mixdes.2019.8787078.
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Zheng, Wenrui, and Hui Li. "Design of Pixel Antenna for Filtering Response Based on N-port Networks." In 2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2023. http://dx.doi.org/10.1109/apcap59480.2023.10470222.
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Islam, Tanvir, Naser Ojaroudi Parchin, Ahmed S. I. Amar, Mohammad Alibakhshikenari, and Shaimaa Ali Mohassieb. "Dual-Port Microstrip-Fed Slot Antenna with Filtering Band for UWB Wireless Networks." In 2023 3rd International Conference on Electronic Engineering (ICEEM). IEEE, 2023. http://dx.doi.org/10.1109/iceem58740.2023.10319568.
Full textReports on the topic "Port filtering"
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Tuqan, Jamal, and P. P. Vaidyanathan. Statistically Optimum Pre - and Post Filtering in Quantization,. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada323664.
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Cook, Samantha, Marissa Torres, Nathan Lamie, Lee Perren, Scott Slone, and Bonnie Jones. Automated ground-penetrating-radar post-processing software in R programming. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45621.
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Ground-penetrating radar (GPR) is a nondestructive geophysical technique used to create images of the subsurface. A major limitation of GPR is that a subject matter expert (SME) needs to post-process and interpret the data, limiting the technique’s use. Post-processing is time-intensive and, for detailed processing, requires proprietary software. The goal of this study is to develop automated GPR post-processing software, compatible with Geophysical Survey Systems, Inc. (GSSI) data, in open-source R programming. This would eliminate the need for an SME to process GPR data, remove proprietary software dependencies, and render GPR more accessible. This study collected GPR profiles by using a GSSI SIR4000 control unit, a 100 MHz antenna, and a Trimble GPS. A standardized method for post-processing data was then established, which includes static data removal, time-zero correction, distance normalization, data filtering, and stacking. These steps were scripted and automated in R programming, excluding data filtering, which was used from an existing package, RGPR. The study compared profiles processed using GSSI software to profiles processed using the R script developed here to ensure comparable functionality and output. While an SME is currently still necessary for interpretations, this script eliminates the need for one to post-process GSSI GPR data.
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DOREN, NEALL E. Space-Variant Post-Filtering for Wavefront Curvature Correction in Polar-Formatted Spotlight-Mode SAR Imagery. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/14165.
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