Zeitschriftenartikel: „A linear model of communication“

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Kobayashi, Naoki, und Akinori Yonezawa. „Asynchronous communication model based on linear logic“. Formal Aspects of Computing 7, Nr. 2 (März 1995): 113–49. http://dx.doi.org/10.1007/bf01211602.

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Calvez, Vincent, Thomas Lepoutre, Nicolas Meunier und Nicolas Muller. „Non-linear analysis of a model for yeast cell communication“. ESAIM: Mathematical Modelling and Numerical Analysis 54, Nr. 2 (19.02.2020): 619–48. http://dx.doi.org/10.1051/m2an/2019065.

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We study the non-linear stability of a coupled system of two non-linear transport-diffusion equations set in two opposite half-lines. This system describes some aspects of yeast pairwise cellular communication, through the concentration of some protein in the cell bulk and at the cell boundary. We show that it is of bistable type, provided that the intensity of active molecular transport is large enough. We prove the non-linear stability of the most concentrated steady state, for large initial data, by entropy and comparison techniques. For small initial data we prove the self-similar decay of the molecular concentration towards zero. Informally speaking, the rise of a dialog between yeast cells requires enough active molecular transport in this model. Besides, if the cells do not invest enough in the communication with their partner, they do not respond to each other; but a sufficient initial input from each cell in the dialog leads to the establishment of a stable activated state in both cells.

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Dutta-Bergman, Mohan Jyoti. „The Linear Interaction Model of Personality Effects in Health Communication“. Health Communication 15, Nr. 1 (Januar 2003): 101–16. http://dx.doi.org/10.1207/s15327027hc1501_5.

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BEAUQUIER, BRUNO, STÉPHANE PÉRENNES und OLIVIER DELMAS. „TIGHT BOUNDS FOR BROADCASTING IN THE LINEAR COST MODEL“. Journal of Interconnection Networks 02, Nr. 02 (Juni 2001): 175–88. http://dx.doi.org/10.1142/s0219265901000312.

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This work considers broadcast protocols made of successive communication rounds in the linear cost model: the time needed to send a message of length L is defined as α + Lτ, where α stands for a start-up time while Lτ represents the cost of sending L bits of data in a channel with bandwidth 1/τ. In this model, the communication time of any algorithm [Formula: see text] is expressed as the sum [Formula: see text], where [Formula: see text] is the number of rounds and [Formula: see text] the transmission cost of the algorithm. In order to design an efficient algorithm realizing a given communication pattern, it appears that minimizing [Formula: see text] and [Formula: see text] are antinomic goals. We study this trade-off issue for broadcast protocols. Surprisingly, such a general theoretical study has almost never been done. In the literature, only the two opposite issues are actually considered: minimizing the number of rounds in the case of short messages, or minimizing the transmission cost in the case of large messages. Our results concern the fully-connected N-nodes network KN, with N = (k + 1)T, in the bidirectional k–ports mode. We derive tight bounds on the communication time for broadcasting in T + r rounds, our lower bounds holding for any network.

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Kumar, Gaurav, und Rakesh Kumar Bajaj. „Intuitionistic Fuzzy Weighted Linear Regression Model with Fuzzy Entropy under Linear Restrictions“. International Scholarly Research Notices 2014 (30.10.2014): 1–10. http://dx.doi.org/10.1155/2014/358439.

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In fuzzy set theory, it is well known that a triangular fuzzy number can be uniquely determined through its position and entropies. In the present communication, we extend this concept on triangular intuitionistic fuzzy number for its one-to-one correspondence with its position and entropies. Using the concept of fuzzy entropy the estimators of the intuitionistic fuzzy regression coefficients have been estimated in the unrestricted regression model. An intuitionistic fuzzy weighted linear regression (IFWLR) model with some restrictions in the form of prior information has been considered. Further, the estimators of regression coefficients have been obtained with the help of fuzzy entropy for the restricted/unrestricted IFWLR model by assigning some weights in the distance function.

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Lin, Jia-Hong, und Wei-Song Lin. „Extended Kalman Filter-Based Codec for Chaotic Communication Systems“. International Journal of Bifurcation and Chaos 24, Nr. 07 (Juli 2014): 1450094. http://dx.doi.org/10.1142/s0218127414500941.

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Two methods are presented to encode and decode messages accurately with an expanded matrix representation of linear multivariable systems in which parameters are used to describe three-port chaotic secure communication networks. The matrix representation includes an optimal extended Kalman filter (EKF)-based observer, which is linear with time. The optimal linearization technique is used to find the exact linear models of the chaotic system at operating states of interest. Subsequently, the EKF algorithm is used to estimate the parameters and states in which a message is embedded. Using the EKF with the optimal linear model, the message can be adequately recovered at the receiver. However, the bit error rate is insufficiently small; therefore, presynchronizations and the carrier-digitalized sources are used to reduce the error rate to obtain robust communications. Numerical examples and simulation results demonstrate the effectiveness of the proposed methodology.

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Tošic, Predrag T. „Cellular Automata Communication Models“. International Journal of Natural Computing Research 1, Nr. 3 (Juli 2010): 66–84. http://dx.doi.org/10.4018/jncr.2010070105.

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In this paper, cellular automata (CA) are viewed as an abstract model for distributed computing. The author argues that the classical CA model must be modified in several important respects to become a relevant model for large-scale MAS. The paper first proposes sequential cellular automata (SCA) and formalizes deterministic and nondeterministic versions of SCA. The author then analyzes differences in possible dynamics between classical parallel CA and various SCA models. The analysis in this paper focuses on one-dimensional parallel and sequential CA with node update rules restricted to simple threshold functions, as arguably the simplest totalistic, yet non-linear (and non-affine) update rules. The author identifies properties of asymptotic dynamics that can be proven to be entirely due to the assumption of perfect synchrony in classical, parallel CA. Finally, the paper discusses what an appropriate CA-based abstraction would be for large-scale distributed computing, insofar as the inter-agent communication models. In that context, the author proposes genuinely asynchronous CA and discusses main differences between genuinely asynchronous CA and various weakly asynchronous sequential CA models found in the literature.

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Sanusi, Yogi Anwar. „Pola Komunikasi Kyai dengan Santri Alumni Pondok Pesantren Miftahul Huda Manonjaya“. Prophetica : Scientific and Research Journal of Islamic Communication and Broadcasting 5, Nr. 2 (31.12.2019): 155–68. http://dx.doi.org/10.15575/prophetica.v5i2.2216.

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Every Islamic Boarding School (pondok pesantren) has different characteristics depending on leadership type and communication patterns of kyai that applied in its learning process. The theory used in this research is the communication pattern that produces a communication model referring to two communication models, linear and circular communication models in Islamic Boardingschool of Miftahul Huda Tasikmalaya. The research method is phenomenology, with the type of research data is qualitative. The results showed that the culture of communication systems in the Miftahul Huda Manonjaya boarding school embraced communication with linear and circular systems, with the forms of kyai and santri communication using instructional communication patterns through organizations, parent and child communication patterns (exemplary). The forms of kyai communication with alumni are instructional communication patterns and parent and child communication patterns (empowerment). Thus, the purpose of the pattern of kyai communication to alumni is to form and increase alumni solidarity with the same vision and mission to develop the propaganda propaganda message of the Miftahul Huda Manonjaya Islamic boarding school. Setiap pondok pesantren memiliki ciri khas yang berbeda tergantung dari tipe leadership dan pola komunikasi kyai yang diterapkan dalam pembelajarannya. Penelitian ini bertujuan untuk mengkaji sistem budaya komunikasi, bentuk komunikasi kyai dan santri dan bentuk komunikasi kyai dengan alumni di pesantren Miftahul Huda Tasikmalaya. Teori yang digunakan dalam penelitian ini adalah pola komunikasi yang menghasilkan model komunikasi yang merujuk pada dua model komunikasi yakni model komunikasi linear dan sirkular. Metode penelitian yang digunakan dalam penelitian ini adalah fenomenologi dengan jenis penelitian kualitatif. Hasil penelitian menunjukkan bahwa budaya sistem komunikasi di Pondok Pesantren Miftahul Huda Manonjaya mengembangkan sistem komunikasi linear dan circular, dengan bentuk komunikasi kyai dan santri menggunakan pola komunikasi melalui pola komunikasi organisasi, orang tua dan anak-anak (teladan). Bentuk komunikasi kyai dengan alumni, adalah pola komunikasi instruksional orang tua dan anak (pemberdayaan). Dengan demikian, tujuan dari pola komunikasi kyai dengan alumni adalah membentuk dan meningkatkan solidaritas alumni dengan visi dan misi yang sama untuk mengembangkan pesan dakwah di Pondok Pesantren Miftahul Huda Manonjaya.

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Aziz, Haris, Péter Biró, Serge Gaspers, Ronald de Haan, Nicholas Mattei und Baharak Rastegari. „Stable Matching with Uncertain Linear Preferences“. Algorithmica 82, Nr. 5 (14.11.2019): 1410–33. http://dx.doi.org/10.1007/s00453-019-00650-0.

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AbstractWe consider the two-sided stable matching setting in which there may be uncertainty about the agents’ preferences due to limited information or communication. We consider three models of uncertainty: (1) lottery model—for each agent, there is a probability distribution over linear preferences, (2) compact indifference model—for each agent, a weak preference order is specified and each linear order compatible with the weak order is equally likely and (3) joint probability model—there is a lottery over preference profiles. For each of the models, we study the computational complexity of computing the stability probability of a given matching as well as finding a matching with the highest probability of being stable. We also examine more restricted problems such as deciding whether a certainly stable matching exists. We find a rich complexity landscape for these problems, indicating that the form uncertainty takes is significant.

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Keršys, Artūras, und Algirdas Jurkauskas. „SEARCH OF THE ROUTE IN THE NETWORK OF PUBLIC COMMUNICATION USING A LINEAR SEQUENCE METHOD“. TRANSPORT 18, Nr. 3 (30.06.2003): 130–35. http://dx.doi.org/10.3846/16483840.2003.10414081.

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The problem of searching the route in the network of public communication is being investigated in the article. A new line sequence method working on the base of a real network model is created for route research in transport communication network and the problem solution. Having analysed a modeling peculiarity of passenger behavior choosing the route, the route evaluation and comparison of the resistance function, including the factors for the route chaise are defined: traveling time, cost and comfort (number of changes). On the base of the mathematic calculation results of public transport communication a part model was determined. It offered the method of the work that can be used for the solution of the examined problem and integrated into the prognosis models of communication processes.

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Kabutey, A., D. Herák, R. Chotěborský und M. Navrátilová. „Model for energy and deformation determination of selected oilseeds under compression loading – Short communication“. Research in Agricultural Engineering 58, No. 4 (11.12.2012): 155–58. http://dx.doi.org/10.17221/17/2011-rae.

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Compression loading test was performed to determine the dependency between force and deformation of jatropha, sunflower and rape seeds with respect to different pressing seed volume. Parameters such as max. deformation and energy were measured. The results which were statistically significant at (P < 0.05) show that rape seed with lower deformation values utilized greater energy than the seeds of jatropha and sunflower which obtained higher deformation values in that order of magnitude. The energy (J) was determined by the area under the force-deformation curve while deformation (mm) was obtained directly from the compression test. Based on the statistical analysis, the energy and deformation with respect to the different pressing seed volume of jatropha, sunflower and rape approximately showed linear relationship.

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Rivals, Isabelle, und Léon Personnaz. „On Cross Validation for Model Selection“. Neural Computation 11, Nr. 4 (01.05.1999): 863–70. http://dx.doi.org/10.1162/089976699300016476.

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In response to Zhu and Rower (1996), a recent communication (Goutte, 1997) established that leave-one-out cross validation is not subject to the “no-free-lunch” criticism. Despite this optimistic conclusion, we show here that cross validation has very poor performances for the selection of linear models as compared to classic statistical tests. We conclude that the statistical tests are preferable to cross validation for linear as well as for nonlinear model selection.

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de Groote, Philippe, und Guy Perrier. „A Note on Kobayashi's and Yonezawa's "Asynchronous Communication Model Based on Linear Logic"“. Formal Aspects of Computing 10, Nr. 2 (28.02.1998): 160–70. http://dx.doi.org/10.1007/s001650050008.

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Ahyar, Ahyar. „Literasi Teknologi Informasi dan Komunikasi Siswa SDI Lukman al-Hakim Mataram: Model Komunikasi dan Pendampingan“. Jurnal Komunikasi Islam 7, Nr. 2 (07.07.2017): 349–70. http://dx.doi.org/10.15642/jki.2017.7.2.349-370.

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This study discusses the communication model and assistance pattern of information and communication technology (ICT) literacy for students conducted by teachers in SDI Lukman al Hakim Hidayatullah Mataram. This study is a descriptive qualitative research using participatory observation and in-depth interviews for two months. The study finding shows there are three models of assistance in ICT literacy, ie individual, group, and synergistic teacher-guardian. While the communication models used by teachers are linear and transactional communication models. By utilizing those models, ICT usage in this school has contributed in positive and significant way to support the process of increasing knowledge, learning experience, and internalization of students' tauhid.

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Phan Trong, Ngo. „CLARITY IN SOCIAL INTELLIGENCE OF SECONDARY SCHOOL STUDENTS“. Journal of Science Educational Science 66, Nr. 1 (Januar 2021): 3–13. http://dx.doi.org/10.18173/2354-1075.2021-0001.

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This study was conducted on 1170 students at 10 secondary schools in 5 provinces in Vietnam. Survey results determined student's clarity on others at medium level. The Clarity to others of surveyed students was correlated with factors such as: communication style, communication trends and temperament of students in communicating and learning from others. The results of multiple linear regresion model of factors have been determined the prediction of the effects of the above factors. The predictive discovered models in the study have been useful suggestions for parents, teachers and students, helping them to improve Clarity in social intelligence of secondary school students.

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He, Li Juan, Lai Yun Ji und Jian Chang Du. „High-Temperature Superconducting Linear Phase Filter for WCDMA Communication System“. Advanced Materials Research 753-755 (August 2013): 2407–10. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2407.

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This paper represents a high-temperature superconducting (HTS) linear phase filter with self-equalization for WCDMA communication system. of the filter have been presented. The principle, equivalent model, theoretical result, coupling matrix, and the simulated result have been presented. The desired filter with 12-pole and 2 cross couplings has a center frequency of 1950 MHz. The measurement results show that the response of practical filters is in good agreement with that of simulated results and theoretical analysis, the group delay variation is less than ±10 ns over 75% of the filter bandwidth.

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Hahn, Jannik, und Olaf Stursberg. „Constrained stochastic predictive control of linear systems with uncertain communication“. at - Automatisierungstechnik 69, Nr. 9 (01.09.2021): 771–81. http://dx.doi.org/10.1515/auto-2021-0033.

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Abstract This paper proposes a scheme of model predictive control for single-loop networked control system (NCS) with probabilistically modeled communication channel and disturbances. Uncertainties of the communication network are projected onto a tailored probability for the satisfaction of state and input constraints. The proposed receding horizon control scheme uses a probabilistic terminal state and set to establish a balance between control performance and state probability distribution, while satisfying the given constraints. In addition to describing the control approach, its properties are discussed, and it is illustrated by an example.

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Madkour, Fatma Elzahraa, Umair Mohammad, Sameh Sorour, Mohamed Hefeida und Ahmed Abdel-Rahim. „Vendor-Independent Reliability Testing Model for Vehicle-to-Infrastructure Communications“. Transportation Research Record: Journal of the Transportation Research Board 2674, Nr. 9 (07.07.2020): 898–912. http://dx.doi.org/10.1177/0361198120932910.

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This paper describes a vendor-independent reliability testing approach for vehicle-to-infrastructure (V2I) communications in connected vehicle traffic signal system applications. It provides an alternative to using the communication data reported by proprietary vendor-supplied interfaces. This approach was based on building a rigorously tested translation model that uses measured received signal strength indicator (RSSI) from any V2I communication equipment to predict the corresponding packet delivery ratio (PDR). This was achieved by correlating the signal strength, measured using a generic power meter, to PDR values reported in the communication interface of the equipment of different vendors. Both stationary and in-motion (10–40 mph) field data collection tests were conducted at three intersections. These tests were performed over distances of up to 500 m between the road-side units (RSUs) and the on-board units (OBUs). In each test, the RSSI values for line-of-sight packet exchange between various RSUs and OBUs was collected in the field, using both a generic power meter and vendor-specific tools. Next, the results were statistically analyzed and logistic and linear regression models that predict PDR values were developed. A case study to test and validate this new PDR prediction model was conducted at two intersections in Boise, Idaho. This prediction model will enable transportation system operators to test and validate the efficiency of connected vehicle RSU/OBU communications at signalized intersection approaches under different traffic conditions, independent of vendor-provided tools.

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Azis, Hasbullah, Pawito Pawito und Agung Satyawan. „EXAMINING COMMUNICATION MEDIATION MODEL ON YOUTH ONLINE POLITICAL ENGAGEMENT“. Profetik: Jurnal Komunikasi 13, Nr. 2 (31.12.2020): 340. http://dx.doi.org/10.14421/pjk.v13i2.1841.

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Using a communication mediation model, the present study tested the influencing factor of social media utilization on the political engagement on social media. Through O-S-O-R model proposed by McLeod, Kosicki, and McLeod, this study tested the correlation between pre-exposure (motivation) – Stimulus (media social use) – post-exposure orientation (political efficacy) – Response (political engagement) in the context of Chinese youth of Singkawang. By analyzing the Pearson correlation and linear regression of 125 respondents collected through a questionnaire, this model resulted in several findings, for example, motivation had a relationship with the use of social media for political information purposes where social utility motives had a more significant effect than other motives. The use of political information media had an influence on an individual's internal and collective efficacy rather than external efficacy. Political efficacy generated by the use of social media had an influence on the political engagement of Singkawang Chinese youth even though external efficacy was deemed a negative predictor of political engagement.

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Li, Huiping, Bo Jin und Weisheng Yan. „Distributed model predictive control for linear systems under communication noise: Algorithm, theory and implementation“. Automatica 125 (März 2021): 109422. http://dx.doi.org/10.1016/j.automatica.2020.109422.

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Karimov, Ramyl. „From linear models of communications to network model - evolution and fusion“. Gumanitarnye vedomosti TGPU im. L. N. Tolstogo 1, Nr. 3 (30.10.2018): 161–72. http://dx.doi.org/10.22405/2304-4772-2018-1-3-161-172.

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Zhang, Xin, Xiang-Yu Huang und Ning Pan. „Development of the Upgraded Tangent Linear and Adjoint of the Weather Research and Forecasting (WRF) Model“. Journal of Atmospheric and Oceanic Technology 30, Nr. 6 (01.06.2013): 1180–88. http://dx.doi.org/10.1175/jtech-d-12-00213.1.

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Abstract The authors propose a new technique for parallelizations of tangent linear and adjoint codes, which were applied in the redevelopment for the Weather Research and Forecasting (WRF) model with its Advanced Research WRF dynamic core using the automatic differentiation engine. The tangent linear and adjoint codes of the WRF model (WRFPLUS) now have the following improvements: A complete check interface ensures that developers write accurate tangent linear and adjoint codes with ease and efficiency. A new technique based on the nature of duality that existed among message passing interface communication routines was adopted to parallelize the WRFPLUS model. The registry in the WRF model was extended to automatically generate the tangent linear and adjoint codes of the required communication operations. This approach dramatically speeds up the software development cycle of the parallel tangent linear and adjoint codes and leads to improved parallel efficiency. Module interfaces were constructed for coupling tangent linear and adjoint codes of the WRF model with applications such as four-dimensional variational data assimilation, forecast sensitivity to observation, and others.

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Yuan, Tianwen, Mingang Liu und Yizhi Feng. „Performance Analysis for SWIPT Cooperative DF Communication Systems with Hybrid Receiver and Non-Linear Energy Harvesting Model“. Sensors 20, Nr. 9 (27.04.2020): 2472. http://dx.doi.org/10.3390/s20092472.

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In this paper, we study the outage and throughput performance for the simultaneous wireless information and power transfer (SWIPT) cooperative decode-and-forward (DF) communication systems. The hybrid receiver that uses both time switching (TS) and power splitting (PS) methods for energy harvesting (EH) and information decoding (ID), and the piece-wise linear EH model that captures the non-linear input-output characteristic of the EH circuit, are considered. We present exact analytical expressions of the outage probability (OP) and throughput, which are expressed as single definite integral on finite interval and can be easily evaluated, for the systems in Rayleigh fading channel. For further simplicity of calculation, we derive novel and closed-form approximate expressions of the OP and throughput. The impact of different system parameters on the system performance is investigated. Numerical results show the high accuracy of the proposed closed-form approximate expressions especially in the region of higher signal-to-noise ratio (SNR). It is also shown that the system performance is greatly overestimated when the ideal linear EH model is used instead of the practical non-linear EH model. A different result to the non-hybrid receiver with both linear EH model and non-linear EH model that there exists an optimal location to minimize the OP for the hybrid receiving relay node with non-linear EH model is also demonstrated.

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Surma, Christopher C., und Martin Barczyk. „Linear model predictive control for vision-based UAV pursuit“. Journal of Unmanned Vehicle Systems 8, Nr. 4 (01.12.2020): 334–63. http://dx.doi.org/10.1139/juvs-2020-0016.

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This article develops and implements a vision-based unmanned aerial vehicle (UAV)-to-UAV pursuit system using a commercial off-the-shelf Parrot AR.Drone 2.0 quadrotor. This technology is intended as a countermeasure to rogue drones carrying out activities such as flying in restricted airspace, performing unauthorized aerial videography, transporting contraband and other criminal activities, or being used as improvised weapons. The proposed approach offers benefits over other current solutions, such as wide-area radio-frequency jamming that interferes with regular communication devices or high-energy military laser systems that are expensive and time consuming to set up. A linear dynamics model of the AR.Drone 2.0 vehicle stabilized by its onboard feedback control system is derived, and its parameters are experimentally identified. A linear model predictive control is developed to track specified flight trajectories, then implemented and validated in hardware flight tests. Detection and ranging of the target UAV from the pursuer UAV’s onboard monocular camera are performed using the YOLO v2 convolutional neural network algorithm. The combined control and vision design is implemented in hardware and tested quantitatively in flight experiments.

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Buzzanell, Patrice M., und Steven R. Goldzwig. „Linear and Nonlinear Career Models“. Management Communication Quarterly 4, Nr. 4 (Mai 1991): 466–505. http://dx.doi.org/10.1177/0893318991004004004.

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LIAN, KUANG-YOW, TUNG-SHENG CHIANG, PETER LIU und CHIAN-SONG CHIU. „SYNCHRONIZATION AND SECURE COMMUNICATION FOR CHAOTIC SYSTEMS: THE MODULATED FUZZY SYSTEM DESIGN“. International Journal of Bifurcation and Chaos 11, Nr. 05 (Mai 2001): 1397–410. http://dx.doi.org/10.1142/s021812740100278x.

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This paper presents a modulated T–S fuzzy model that can be applied to both continuous/discrete chaotic synchronization, chaotic model following and secure communication. The modulated T–S fuzzy model is constructed by choosing the common factor or the only variable of nonlinear terms in chaotic systems as the premise variable of fuzzy rules and output signal. Following this model, fuzzy chaotic synchronization is achieved by utilizing linear matrix inequalities design and some restricting conditions can be relaxed. This simplified design framework can be applied to many well-known chaotic systems. Also, for chaotic communications, this modulated T–S fuzzy model illustrates asymptotical recovering of the message. Moreover, the usage of combinational states as the coupling signal for Luré type systems is taken into consideration. In this case, the receiver design for synchronization and secure communication is also proposed. The simulation results are shown with expected satisfactory performance.

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Cui, Lizhen, Jian Cao, Zhulin An, Yong Yang und Qianqian Guo. „Research on time synchronization of linear pulse-coupled oscillators model with delay in nearest neighbor wireless multi-hop networks“. International Journal of Distributed Sensor Networks 17, Nr. 7 (Juli 2021): 155014772110363. http://dx.doi.org/10.1177/15501477211036383.

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Time synchronicity works as a popular requirement in wireless sensor networks. Pulse-coupled oscillators similar to firefly flashing and synchronization via discrete pulse coupling are widely used in wireless sensor networks. In this article, we have studied the time synchronization with communication delay in the nearest neighbor network of distributed sensors, based on the pulse-coupled oscillators model of synchronicity achieved by biological systems. First, we present a linear pulse-coupled oscillators model with coupling delay and the model is used to analyze the wireless sensor networks synchronization with communication delay. Second, we mathematically analyze the firing behaviors in the linear pulse-coupled oscillators network using the delayed excitatory coupling and track the synchronization process of the two and multi-oscillators and obtain the synchronization conditions from the regression mapping. Finally, through the proposed model implementation in the wireless sensor networks simulation framework, we demonstrate that the multi-oscillators system can be synchronized from a random starting stage distribution under linear phase responding functions and the nearest neighbor communication. The results show that our approach can achieve clock synchronization in wireless sensor networks with delayed nearest neighbor communication.

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Gholami, Milad, Alessandro Pilloni, Alessandro Pisano und Elio Usai. „Robust Distributed Secondary Voltage Restoration Control of AC Microgrids under Multiple Communication Delays“. Energies 14, Nr. 4 (22.02.2021): 1165. http://dx.doi.org/10.3390/en14041165.

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This paper focuses on the robust distributed secondary voltage restoration control of AC microgrids (MGs) under multiple communication delays and nonlinear model uncertainties. The problem is addressed in a multi-agent fashion where the generators’ local controllers play the role of cooperative agents communicating over a network and where electrical couplings among generators are interpreted as disturbances to be rejected. Communications are considered to be affected by heterogeneous network-induced time-varying delays with given upper-bounds and the MG is subjected to nonlinear model uncertainties and abrupt changes in the operating working condition. Robustness against uncertainties is achieved by means of an integral sliding mode control term embedded in the control protocol. Then, the global voltage restoration stability, despite the communication delays, is demonstrated through a Lyapunov-Krasovskii analysis. Given the delays’ bounds, and because the resulting stability conditions result in being non-convex with respect to the controller gain, then a relaxed linear matrix inequalities-based tuning criteria is developed to maximize the controller tuning, thus minimizing the restoration settling-time. By means of that, a criteria to estimate the maximal delay margin tolerated by the system is also provided. Finally, simulations on a faithful nonlinear MG model, showing the effectiveness of the proposed control strategy, are further discussed.

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Washington, Richard, Brenton Bischof, Dmitriy Garmatyuk und Saba Mudaliar. „Clutter-Masked Waveform Design for LPI/LPD Radarcom Signal Encoding“. Sensors 21, Nr. 2 (18.01.2021): 631. http://dx.doi.org/10.3390/s21020631.

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In this work we propose a method of in situ clutter deconvolution and modeling using experimentally obtained UWB radar data. The obtained clutter models are then used for random sequence encoding of radar-communication (radarcom) signals to achieve clutter-masked transmissions and improve communication security. We present the results of clutter modeling from the laboratory data obtained with the software-defined radar system. We then show that such clutter-masked radarcom signals generated using the local clutter model are highly likely to be interpreted as just clutter returns by an unauthorized interceptor. We also present the results of communication and radar performance of these radarcom signals and contrast them with those obtained using a linear frequency modulated waveform. It is shown that the proposed radarcom design method has high potential to achieve secure communications in adversarial conditions, while simultaneously addressing radar sensing needs.

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Thum, Yeow Meng. „Hierarchical Linear Models for Multivariate Outcomes“. Journal of Educational and Behavioral Statistics 22, Nr. 1 (März 1997): 77–108. http://dx.doi.org/10.3102/10769986022001077.

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In this article, we develop a class of two-stage models to accommodate three common characteristics of behavioral data. First, behavior is invariably multivariate in its conceptualization and communication. Separate univariate analyses of related outcome variables are fraught with potential interpretive blind spots for the researcher. This practice also suffers, from an inferential standpoint, because it fails to take advantage of any redundant information in the outcomes. Second, studies of behavior, especially in experimental research, employ smaller samples. This situation raises issues of robustness of inference with respect to outlying individuals. Third, the outcome variable may have observations missing because of accidents or by design. The model permits the estimation of the full spectrum of plausible measurement error structures while using all the available information. Maximum likelihood estimates are obtained for various members of a multivariate hierarchical linear model (MHLM), and, in the context of several illustrative examples, these estimates match closely the results from a Bayesian approach to the normal-normal MHLM and to the normal- t MHLM.

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Han, Cunwu, Dehui Sun, Song Bi, Lei Liu und Zhengxi Li. „Modeling and Model Predictive Power and Rate Control of Wireless Communication Networks“. Journal of Applied Mathematics 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/642673.

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A novel power and rate control system model for wireless communication networks is presented, which includes uncertainties, input constraints, and time-varying delays in both state and control input. A robust delay-dependent model predictive power and rate control method is proposed, and the state feedback control law is obtained by solving an optimization problem that is derived by using linear matrix inequality (LMI) techniques. Simulation results are given to illustrate the effectiveness of the proposed method.

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Lei, Jinhui, und Xiyan Tian. „Proposal of a new Maximum Lifetime Communication Model of Wireless Sensor Network“. International Journal of Online Engineering (iJOE) 12, Nr. 10 (31.10.2016): 31. http://dx.doi.org/10.3991/ijoe.v12i10.6202.

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One new maximum lifetime communication model of wireless sensor network is proposed in this thesis and the model is based on conditions of base station with multiple sources and multiple links and the data generated from the source node can be transmitted to several base stations through multiple links. In this chapter, energy limitation and data stream conservation principles of a wireless sensor network are used to establish a linear planning model, and attaining the maximum lifetime of the network is the optimal objective to establish a model with multiple restrictions restricted by energy and bandwidth. The basic element influencing the lifetime of a wireless sensor network is the data forwarding rate. The lifetime of nodes will become longer with the decrease of node data. In this thesis, the data size of network nodes is taken as sub-optimization objective and the distributed heuristic algorithm will be used to solve the linear planning model. In the end, a simulation experiment is conducted to verify yhe performance of the communication model and indicate that the proposed model can effectively increase network lifetime.

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McGarvey, Ronald G., Brian Q. Rieksts, José A. Ventura und Namsu Ahn. „Binary linear programming models for robust broadcasting in communication networks“. Discrete Applied Mathematics 204 (Mai 2016): 173–84. http://dx.doi.org/10.1016/j.dam.2015.11.008.

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Harel, Daphna, und Tara McAllister. „Multilevel Models for Communication Sciences and Disorders“. Journal of Speech, Language, and Hearing Research 62, Nr. 4 (15.04.2019): 783–801. http://dx.doi.org/10.1044/2018_jslhr-s-18-0075.

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Purpose Research in communication sciences and disorders frequently involves the collection of clusters of observations, such as a series of scores for each individual receiving treatment over the course of an intervention study. However, little discipline-specific guidance is currently available on the subject of building and interpreting multilevel models. This article offers a tutorial on multilevel models, using notation from the R statistical software, and discusses their implications for research in communication sciences and disorders. Method This tutorial introduces multilevel models and contrasts them with other methods to analyze repeated measures data, such as repeated measures analysis of variance or standard linear regression. It also provides guidance on interpreting the components of a multilevel model and selecting the best-fitting model. Finally, these models are illustrated through an analysis of real data from a study of speech production training in second-language speakers of English. Conclusions As a flexible method that can increase the rigor of modeling for clustered data, multilevel modeling represents an important tool for research in communication disorders. Given their increasingly prominent role in the analysis of experimental data in communication sciences, it is important for researchers to be familiar with the basics of building and interpreting these models.

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Steer, Philippe. „Short communication: Analytical models for 2D landscape evolution“. Earth Surface Dynamics 9, Nr. 5 (15.09.2021): 1239–50. http://dx.doi.org/10.5194/esurf-9-1239-2021.

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Abstract. Numerical modelling offers a unique approach to understand how tectonics, climate and surface processes govern landscape dynamics. However, the efficiency and accuracy of current landscape evolution models remain a certain limitation. Here, I develop a new modelling strategy that relies on the use of 1D analytical solutions to the linear stream power equation to compute the dynamics of landscapes in 2D. This strategy uses the 1D ordering, by a directed acyclic graph, of model nodes based on their location along the water flow path to propagate topographic changes in 2D. This analytical model can be used to compute in a single time step, with an iterative procedure, the steady-state topography of landscapes subjected to river, colluvial and hillslope erosion. This model can also be adapted to compute the dynamic evolution of landscapes under either heterogeneous or time-variable uplift rate. This new model leads to slope–area relationships exactly consistent with predictions and to the exact preservation of knickpoint shape throughout their migration. Moreover, the absence of numerical diffusion or of an upper bound for the time step offers significant advantages compared to numerical models. The main drawback of this novel approach is that it does not guarantee the time continuity of the topography through successive time steps, despite practically having little impact on model behaviour.

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Cerrone, Mirko, und Nelly Mäekivi. „A zoosemiotic approach to the transactional model of communication“. Semiotica 2021, Nr. 242 (11.08.2021): 39–62. http://dx.doi.org/10.1515/sem-2020-0052.

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Abstract The analysis of social communication in other-than-human animals poses several theoretical challenges due to the complexity of individual and extra-individual variables. Some previous studies have found a valuable solution in Uexküll’s work by expanding and adapting its usage for the study of communication in a heurtistic manner. An Umwelt analysis provides a theoretical toolbox, which allows researchers to take an emic perspective on the lives and phenomenal world of other animals. However, Umwelt and its elaborations do not allow for a clear distinction between acts of perception and communication and seem to ignore factors that escape the specific communication contexts under analysis. Thus, moving away from the existing linear and cyclical approaches to communication, we propose a complementary approach to the study of social communication by combining Barnlund’s transactional model of communication with Umwelt theory and the functional circle more specifically. Our elaborated model conceives social communication as the process of creating meaning through the interaction of two (or more) subjects and emphasizes the role of species-specific and individual features in its creation. Our goal is to re-evaluate the research on social communication of other-than-human animals by advocating for the theoretical and empirical potential of Umwelt, especially pertaining to animals with complex Umwelten. Our model offers a valuable solution to the analysis of intraspecies communication that accounts for the role of private and public cues as well as the subjects’ specific behaviors, messages, and context in the creation of meaning.

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Artemova, Tatiana K., Aleksey S. Gvozdarev und Konstantin S. Artemov. „Mutual antenna coupling influence on the channel correlation matrix for linear antenna arrays“. Bulletin of Electrical Engineering and Informatics 10, Nr. 2 (01.04.2021): 820–27. http://dx.doi.org/10.11591/eei.v10i2.2709.

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The paper presents the results of the research of electromagnetic mutual coupling impact on the structure of the correlation matrices in multiantenna communication systems. Classical correlation structures employed in most of the up-to-date communication systems descriptions and designs usually assume unit autocorrelation and exponentially decreasing cross-correlation of antenna elements in the receiving/transmitting array. At the same time numerous studies had shown that these assumptions may not hold under certain conditions. The performed research relates the correlation effects with the imbalances of the array impedance matrix terms and studies the impact of antenna elements mutual electromagnetic interaction upon the diagonal (autocorrelation) and off-diagonal (cross-correlation) terms of correlation matrix, depending of the geometry of the array: number of elements and their spatial separation. To exemplify quantitative results the analysis was carried out for the 5G NR #78 band, being one of the most wideband subchannels in Under-6 GHz regime for 5G systems. The obtained results also justified the applicability of the banded correlation matrix model for wireless communications.

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Xiao, Zhi Yan. „Experimental Exploration of Emotional Communication Strategies of Foreign Language Teaching in Network Environment“. Advanced Materials Research 791-793 (September 2013): 1669–74. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.1669.

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In this study, it explores meaning and application of mutual aid education model using multiple regression analysis of statistics. It establishes multiple linear regression models and the matrix of teaching dynamic factors. It confirms that the emotional communication strategy model of foreign language teaching in the network environment mode in the Foreign Language Teaching not only can effectively improve the overall performance and collaborative communication skills of the students but also can emphasis on the three-dimensional cooperation meaning between teaching dynamic factors.

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Liu, Ying Ying, und Yun Kai Chu. „Stabilization for Networked Control Systems with Limited Communication“. Applied Mechanics and Materials 397-400 (September 2013): 1963–66. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.1963.

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This paper studies the stabilization problems of networked control systems (NCSs) with dynamical quantizers. A new model is proposed that takes into consideration the effect of the network induced delay, the quantization levels, and based on this model, dynamical quantization scheme is introduced. The relationship between the delay bound，the quantization range and stability is given by using Lyapunov stability theory and linear matrix inequalities (LMIs) approach, and convex condition of the stabilization controller is presented. A simulation example shows the effectiveness of the proposed method.

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Zhong, Zhaoqian, und Masato Edahiro. „Model-Based Parallelization for Simulink Models on Multicore CPUs and GPUs“. INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 20 (04.01.2020): 1–13. http://dx.doi.org/10.24297/ijct.v20i.8533.

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In this paper we propose a model-based approach to parallelize Simulink models of image processing algorithms on homogeneous multicore CPUs and NVIDIA GPUs at the block level and generate CUDA C codes for parallel execution on the target hardware. In the proposed approach, the Simulink models are converted to directed acyclic graphs (DAGs) based on their block diagrams, wherein the nodes represent tasks of grouped blocks or subsystems in the model and the edges represent the communication behaviors between blocks. Next, a path analysis is conducted on the DAGs to extract all execution paths and calculate their respective lengths, which comprises the execution times of tasks and the communication times of edges on the path. Then, an integer linear programming (ILP) formulation is used to minimize the length of the critical path of the DAG, which represents the execution time of the Simulink model. The ILP formulation also balances workloads on each CPU core for optimized hardware utilization. We parallelized image processing models on a platform of two homogeneous CPU cores and two GPUs with our approach and observed a speedup performance between 8.78x and 15.71x.

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Brown, Tim W. C., Ben H. Allen, Timothy D. Drysdale und Upasana K. Dagia. „Linear angular momentum multiplexing—conceptualization and experimental evaluation with antenna arrays“. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 476, Nr. 2242 (Oktober 2020): 20200209. http://dx.doi.org/10.1098/rspa.2020.0209.

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Linear angular momentum multiplexing is a new method for providing highly spectrally efficient short-range communication between a transmitter and receiver, where one may move at speed transverse to the propagation. Such applications include rail, vehicle and hyperloop transport systems communicating with fixed infrastructure on the ground. This paper describes how the scientific concept of linear angular momentum multiplexing evolves from orbital angular momentum multiplexing. The essential parameters for implementing this concept are a long array at least at one of the ends of the link; antenna element radiation characteristics and the array element spacing relative to the propagation distance. These parameters are also backed by short-range measurements carried out at 2.4 GHz used to model the Rice fading channel and determine resilience to multipath fading.

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Yu, Hongyan, Songtao Guo und Fei Wang. „Stability and bifurcation analysis of Westwood+ TCP congestion control model in mobile cloud computing networks“. Nonlinear Analysis: Modelling and Control 21, Nr. 4 (21.07.2016): 477–97. http://dx.doi.org/10.15388/na.2016.4.4.

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In this paper, we first build up a Westwood+ TCP congestion control model with communication delay in mobile cloud computing networks. We then study the dynamics of this model by analyzing the distribution ranges of eigenvalues of its characteristic equation. Taking communication delay as the bifurcation parameter, we derive the linear stability criteria depending on communication delay. Furthermore, we study the direction of Hopf bifurcation as well as the stability of periodic solution for the Westwood+ TCP congestion control model with communication delay. We find that the Hopf bifurcation occurs when the communication delay passes a sequence of critical values. The stability and direction of the Hopf bifurcation are determined by the normal form theory and the center manifold theorem. Finally, numerical simulation is done to verify the theoretical results.

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Yustina, Dea, Iwit Prihatin und Hodiyanto Hodiyanto. „PENGARUH PENGGUNAAN MEDIA INSTAGRAM BERMUATAN PROBLEM POSING TERHADAP KEMAMPUAN KOMUNIKASI MATEMATIS SISWA SMA“. Prima Magistra: Jurnal Ilmiah Kependidikan 2, Nr. 1 (29.03.2021): 23–31. http://dx.doi.org/10.37478/jpm.v2i1.776.

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The purpose of this study was to determine: (1) students' mathematical communication skills before being given learning using Instagram media containing problem posing in the system of linear equations and inequalities; (2) students' mathematical communication skills after being given learning using Instagram media containing problem posing in the material of linear equations and inequality systems; (3) the effect of using Instagram media containing problem posing on students' mathematical communication skills in the material of linear equations and inequality systems in class X SMA Koperasi Pontianak; (4) the magnitude of the influence by using Instagram media with problem posing content on students' mathematical communication skills in the material of linear equations and inequality systems in class X SMA Koperasi Pontianak. This reseach method is to use the Pre Eksperimental Desaign method. Sampling was done by saturated sampling technique. The instrument for collecting data was a test of mathematical communication skills. The data analysis in this study used descriptive data analysis and inferential statistic. The results of the study were that before the learning model was applied with an average student score of 39.97 which was classified as a failure, and after being applied the learning model with an average of 58.07 was sufficient so that there was an increase, from the research results there was also an influence and also the magnitude of the effect. After learning is applied using instructional media that contains problem posing on students' mathematical communication skills.

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Nurlaili, Nurlaili, Andi Warnaen und Bambang Riyanto. „Model dan Gaya Komunikasi dalam Program Upaya Khusus Padi Jagung Kedelai“. Jurnal Penyuluhan 15, Nr. 2 (02.10.2019): 230–38. http://dx.doi.org/10.25015/15201923057.

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The aim of this research was to examine the model and the style of communication used in the Special Effort Program for Increasing Paddy, Corn and Soybean Production (UPSUS PAJALE). This research was conducted in Tulungagung Regency, East Java Province. This research was a descriptive qualitative research. The research strategy used was a case study. Data collection techniques used in this study were: (1) Observation, (2) In-depth interview, (3) Reviewing documents and archives, and (4) Data collection with Focus Group Discussion (FGD) as a support. The communication model used in UPSUS program in Tulungagung District was a communication model of chain structure in the form of coordinative and linear relationship. UPSUS program communication model in Tulungagung Regency was considered not effective in UPSUS program delivery so there was still a lot of miscommunication at the implementation level below between extension worker with Babinsa and Extension Worker with Mantri Tani. This was because there is no cross-sector coordination and was caused by the controlling style of the stakeholders because of pressure from their superiors, which in the end the interactive communication or effective participatory communication didn't occur.

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Flynn, James, und Donald MacGregor. „Commentary on hormesis and public risk communication: is there a basis for public discussions?“ Human & Experimental Toxicology 22, Nr. 1 (Januar 2003): 31–34. http://dx.doi.org/10.1191/0960327103ht316oa.

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Research on radiation exposure is now focusing on microbiology and the impact of low dose exposures on cells and cell components. Eventually, this research may provide evidence to support changes in the models used to regulate human and environmental exposures. Currently, three models using older research results are subjects of interest and comparison. The linear no threshold model, the most restrictive on behalf of public health values, dominates regulatory decision making. Alternative models (i.e., the threshold model and the hormesis model) could reduce costs of radiation management, depending upon new research results and public acceptance. Enacting a new public exposure model is a daunting task for risk communication given existing public risk perceptions and the established public decision-making processes. Each of the three prominent models must answer the question, ‘what social good requires the use of this model in contrast to the others?’

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Johnson, Thomas J., Wayne Wanta, Timothy Boudreau, Janet Blank-Libra, Killian Schaffer und Sally Turner. „Influence Dealers: A Path Analysis Model of Agenda Building during Richard Nixon's War on Drugs“. Journalism & Mass Communication Quarterly 73, Nr. 1 (März 1996): 181–94. http://dx.doi.org/10.1177/107769909607300116.

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This agenda-building study employed a path analysis model to examine the three-way relationship among the public, the media, and the president on the issue of drug abuse during the Nixon administration. The path model also measured the extent to which these actors were influenced by real-world conditions about the number of drug-related arrests in the United States. Past studies have suggested a cyclical relationship should exist among the president, the press, and the public. This study, however, found a linear relationship with issues moving first, from real world to the media and the public, then from the media to the public, and finally from the public to the president.

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Leong, Ching Chia, und Mohamad Khairi Ishak. „Performance evaluation of embedded ethernet and Controller Area Network (CAN) in real time control communication system“. International Journal of Reconfigurable and Embedded Systems (IJRES) 8, Nr. 1 (01.03.2019): 36. http://dx.doi.org/10.11591/ijres.v8.i1.pp36-50.

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Real-time communication is important in control network. In real-time communication, message need to be delivered from source to destination within specification. Embedded Ethernet and Controller Area Network (CAN) protocol can be used in control network to achieve hard real-time communication. For embedded Ethernet protocol, Carrier Sense Multiple Access with Collision Detection (CSMA/CD) is the media access control (MAC) used to control data transmission between nodes in network. Back-off algorithm in CSMA/CD is used to handle packet collisions and retransmission. For CAN protocol, it is communication protocol developed mainly for automotive application. It has priority arbitration to handle collisions and retransmission. In this project, embedded Ethernet network models and CAN network models are developed and simulated in MATLAB Simulink software. Several back-off algorithms, which are Binary Exponential Backoff (BEB), Linear Back-off Algorithm, Exponential-Linear back-off Algorithm and Logarithm Back-off Algorithm are proposed and implemented into Embedded Ethernet network model to evaluate the performance. Both embedded Ethernet and CAN network models are extended to 3 nodes, 10 nodes, and 15 nodes to evaluate performance at different network condition. The performance criteria evaluated and discussed are average delay and jitter of packets. The results show that in network with high number of nodes, Linear Back-off Algorithm and Exponential-Linear back-off Algorithm shows improvement in packets delay and jitter. For CAN network, the packet jitter is relatively low.

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Bruun, Hanne. „The Prism of Change“. Nordicom Review 37, Nr. 2 (01.11.2016): 33–49. http://dx.doi.org/10.1515/nor-2016-0016.

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Abstract This article presents and discusses the communicative behaviour in the continuity texts produced by public service television providers in Denmark in the digital era. Based on a case study of the two main channels, DR and TV 2, the article argues that, after previous trends towards convergence in the way the two providers communicate, the present developments exhibit a divergence. Three major differences are found in the efforts to (1) hold on to and ‘herd’ the viewers within the scope of products and platforms, (2) strengthen the provider–viewer relationship, and (3) stand out with a distinctive set of institutional values. The findings are interpreted as a consequence of the challenges and opportunities facing the providers in terms of funding and in terms of meeting public service obligations, in a situation of tension between a traditional linear model of broadcasting and an emerging non-linear model.

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Dong, Ling Ling, Yong Guan, Xiao Juan Li, Zhi Ping Shi, Jie Zhang und Wei Hua. „Model Checking for SpaceWire Error Detection Module“. Applied Mechanics and Materials 241-244 (Dezember 2012): 3020–25. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.3020.

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Considerable attention has been devoted to prove the correctness of programs. Formal verification overcomes the incompleteness by applying mathematical methods to verify a design. SpaceWire is a well known communication standard. For safety-critical applications an approach is needed to validate the completeness of SpareWire design. This paper addresses formal verification of SpareWire error detection module. The system model was constructed by Kripke structure, and the properties were presented by linear temporal logic (LTL). Compared the verification of LTL with CTL (branch temporal logic), LTL properties could improve the verification efficiency due to its linear search. The error priority was checked using simulation guided by model checking. After some properties were modified, all possible behaviors of the module satisfied the specification. This method realizes complete validation of the error detection module.

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Li, Rui. „Linear Comprehensive Evaluation Method on Intercultural Communicative Competence“. Applied Mechanics and Materials 543-547 (März 2014): 4323–26. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.4323.

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With the continuous development of economic globalization and information network, the intercultural communication people from different regions and cultural backgrounds are widespread. For the problems in intercultural personnel training and evaluation, this paper uses linear comprehensive evaluation method to conduct the study based on evaluation index system. First, building an evaluation mathematical model, and the evaluation could be divided into three steps according to solving process; then, creating the index weight vectors, which includes one-level index weight vector and six two-level index weight vectors; finally, comprehensive evaluation case study should be carried on according to solving steps, so you can get evaluation findings. The advantages of the method presented in this paper is that the interaction between each evaluation index obtains linear compensation, so it ensures the fairness of the comprehensive evaluation and plays an important role in promoting intercultural communication and personnel training.

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