Academic literature on the topic 'CONEX information model'
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Journal articles on the topic "CONEX information model"
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Ben-Haim, Y. "Convex Models of Uncertainty in Radial Pulse Buckling of Shells." Journal of Applied Mechanics 60, no. 3 (September 1, 1993): 683–88. http://dx.doi.org/10.1115/1.2900858.
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The buckling of shells subject to radial impulse loading has been studied by many investigators, and it is well known that the severity of the buckling response is greatly amplified by initial geometrical imperfections in the shell shape. Traditionally, these imperfections have been modeled stochastically. In this study convex models provide a convenient alternative to probabilistic representation of uncertainty. Convex models are well suited to the limitations of the available information on the nature of the geometrical uncertainties. A n ellipsoidal convex model is employed and the maximum pulse response is evaluated. The ellipsoidal convex model is based on three types of information concerning the initial geometrical uncertainty of the shell: (1) which mode shapes contribute to the imperfections, (2) bounds on the relative amplitudes of these modes, and (3) the magnitude of the maximum initial deviation of the shell from its nominal shape. The convex model analysis yields reasonable results in comparison with a probabilistic analysis due to Lindberg (1992a,b). We also consider localized imperfections of the shell. Results with a localized envelope-bound convex model indicate that very small regions of localized geometrical imperfections result in buckling damage which is a substantial fraction of the damage resulting from full circumferential initial imperfection.
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Wang, Quanhui, En Fan, and Pengfei Li. "Fuzzy-Logic-Based, Obstacle Information-Aided Multiple-Model Target Tracking." Information 10, no. 2 (February 2, 2019): 48. http://dx.doi.org/10.3390/info10020048.
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Incorporating obstacle information into maneuvering target-tracking algorithms may lead to a better performance when the target when the target maneuver is caused by avoiding collision with obstacles. In this paper, we propose a fuzzy-logic-based method incorporating new obstacle information into the interacting multiple-model (IMM) algorithm (FOIA-MM). We use convex polygons to describe the obstacles and then extract the distance from and the field angle of these obstacle convex polygons to the predicted target position as obstacle information. This information is fed to two fuzzy logic inference systems; one system outputs the model weights to their probabilities, the other yields the expected sojourn time of the models for the transition probability matrix assignment. Finally, simulation experiments and an Unmanned Aerial Vehicle experiment are carried out to demonstrate the efficiency and effectiveness of the proposed algorithm.
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LI, H., and L. Z. JIA. "ASSESSMENT OF DAMAGE AND LOSS OF SEISMICALLY EXCITED STRUCTURES BASED ON CONVEX ANALYSIS." Journal of Earthquake and Tsunami 05, no. 02 (June 2011): 101–18. http://dx.doi.org/10.1142/s1793431111000954.
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Probabilistic results drawn upon inadequate information are suspicious. The convex set theory, which requires much less information, is employed to model the uncertainties of the spectral displacement and damage state medians. Furthermore, a convex model of fragility function is established based on the envelope bound convex models of the spectral displacement and damage state medians. A bound loss estimation method is derived by integrating HAZUS-AEBM module with the convex set theory. The loss bounds of a hotel in southern China are obtained and compared to the loss calculated by HAZUS-AEBM method, which locates in the lower half interval of convex analysis results. The uncertainty propagation is analyzed and damage state medians are found to be the most critical factor to the loss. Finally, the PEER's probabilistic loss estimation methodology is also applied to this example to deduce the probability of loss exceeding the bound values of convex analysis results.
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Li, Sanjiang, and Weiming Liu. "Topological Relations between Convex Regions." Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 3, 2010): 321–26. http://dx.doi.org/10.1609/aaai.v24i1.7586.
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Topological relations between spatial objects are the most important kind of qualitative spatial information. Dozens of relation models have been proposed in the past two decades. These models usually make a small number of distinctions and therefore can only cope with spatial information at a fixed granularity of spatial knowledge. In this paper, we propose a topological relation model in which the topological relation between two convex plane regions can be uniquely represented as a circular string over the alphabet {u; v; x; y}. A linear algorithm is given to compute the topological relation between two convex polygons. The infinite relation calculus could be used in hierarchical spatial reasoning as well as in qualitative shape description.
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Herskovic, Bernard, and João Ramos. "Acquiring Information through Peers." American Economic Review 110, no. 7 (July 1, 2020): 2128–52. http://dx.doi.org/10.1257/aer.20181798.
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We develop an endogenous network formation model, in which agents form connections to acquire information. Our model features complementarity in actions as agents care not only about accuracy of their decision-making but also about the actions of other agents. In equilibrium, the information structure is a hierarchical network, and, under weakly convex cost of forming links, the equilibrium network is core-periphery. Although agents are ex ante identical, there is ex post heterogeneity in payoffs and actions. (JEL D83, D85, Z13)
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Yamaka, Woraphon, Rungrapee Phadkantha, and Paravee Maneejuk. "A Convex Combination Approach for Artificial Neural Network of Interval Data." Applied Sciences 11, no. 9 (April 28, 2021): 3997. http://dx.doi.org/10.3390/app11093997.
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As the conventional models for time series forecasting often use single-valued data (e.g., closing daily price data or the end of the day data), a large amount of information during the day is neglected. Traditionally, the fixed reference points from intervals, such as midpoints, ranges, and lower and upper bounds, are generally considered to build the models. However, as different datasets provide different information in intervals and may exhibit nonlinear behavior, conventional models cannot be effectively implemented and may not be guaranteed to provide accurate results. To address these problems, we propose the artificial neural network with convex combination (ANN-CC) model for interval-valued data. The convex combination method provides a flexible way to explore the best reference points from both input and output variables. These reference points were then used to build the nonlinear ANN model. Both simulation and real application studies are conducted to evaluate the accuracy of the proposed forecasting ANN-CC model. Our model was also compared with traditional linear regression forecasting (information-theoretic method, parametrized approach center and range) and conventional ANN models for interval-valued data prediction (regularized ANN-LU and ANN-Center). The simulation results show that the proposed ANN-CC model is a suitable alternative to interval-valued data forecasting because it provides the lowest forecasting error in both linear and nonlinear relationships between the input and output data. Furthermore, empirical results on two datasets also confirmed that the proposed ANN-CC model outperformed the conventional models.
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Agrawal, Akshay, Shane Barratt, and Stephen Boyd. "Learning Convex Optimization Models." IEEE/CAA Journal of Automatica Sinica 8, no. 8 (August 2021): 1355–64. http://dx.doi.org/10.1109/jas.2021.1004075.
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Shah, S., and M. D. Levine. "Visual information processing in primate cone pathways. I. A model." IEEE Transactions on Systems, Man and Cybernetics, Part B (Cybernetics) 26, no. 2 (April 1996): 259–74. http://dx.doi.org/10.1109/3477.485837.
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Yang, Yunyun, and Boying Wu. "Convex Image Segmentation Model Based on Local and Global Intensity Fitting Energy and Split Bregman Method." Journal of Applied Mathematics 2012 (2012): 1–16. http://dx.doi.org/10.1155/2012/692589.
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We propose a convex image segmentation model in a variational level set formulation. Both the local information and the global information are taken into consideration to get better segmentation results. We first propose a globally convex energy functional to combine the local and global intensity fitting terms. The proposed energy functional is then modified by adding an edge detector to force the active contour to the boundary more easily. We then apply the split Bregman method to minimize the proposed energy functional efficiently. By using a weight function that varies with location of the image, the proposed model can balance the weights between the local and global fitting terms dynamically. We have applied the proposed model to synthetic and real images with desirable results. Comparison with other models also demonstrates the accuracy and superiority of the proposed model.
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Gallagher, Ryan J., Kyle Reing, David Kale, and Greg Ver Steeg. "Anchored Correlation Explanation: Topic Modeling with Minimal Domain Knowledge." Transactions of the Association for Computational Linguistics 5 (December 2017): 529–42. http://dx.doi.org/10.1162/tacl_a_00078.
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While generative models such as Latent Dirichlet Allocation (LDA) have proven fruitful in topic modeling, they often require detailed assumptions and careful specification of hyperparameters. Such model complexity issues only compound when trying to generalize generative models to incorporate human input. We introduce Correlation Explanation (CorEx), an alternative approach to topic modeling that does not assume an underlying generative model, and instead learns maximally informative topics through an information-theoretic framework. This framework naturally generalizes to hierarchical and semi-supervised extensions with no additional modeling assumptions. In particular, word-level domain knowledge can be flexibly incorporated within CorEx through anchor words, allowing topic separability and representation to be promoted with minimal human intervention. Across a variety of datasets, metrics, and experiments, we demonstrate that CorEx produces topics that are comparable in quality to those produced by unsupervised and semi-supervised variants of LDA.
Dissertations / Theses on the topic "CONEX information model"
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Jingzhi, Guo, and n/a. "Integrating Ad Hoc Electronic Product Catalogues Through Collaborative Maintenance of Semantic Consistency." Griffith University. School of Computing and Information Technology, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050824.125257.
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Existing electronic markets are fragmented in the sense that each is an information island. The interoperation of product information between them is difficult especially in semantics communication. This prevents the formation of global electronic markets and the lowering distribution cost through market globalisation. The traditional and contemporary ap-proaches of product standardisation and ontology mediation could solve the problem only if all markets could adopt the same product standards, or mediation systems could mediate all heterogeneous standards and markets without semantic conflicts. However, problems generally exist in adopting a universal standard or mediating all markets through existing mediation systems. A reflection of the issue is that there are millions of ad hoc electronic product catalogues (EPCs) situated in small and medium sized enterprises (SMEs), where each EPC is a semantic community, often not aware of standards and mediation systems due to its ad hoc nature. This thesis focuses on the semantic integration of autonomous ad hoc EPCs, which are semantically inconsistent with each other. Firstly, a novel Collaborative Concept Exchange (CONEX) approach is developed for the se-mantic integration of ad hoc EPCs. Using this approach, a PRODUCT MAP is first built based on the theories of semiotic analysis and market segmentation. It functions as an analytical framework to articulate ad hoc EPCs, and answers the questions: what are the general char-acteristics of ad hoc EPCs, what are their heterogeneous relations, and how they are unevenly distributed in fragmented electronic markets. Within this framework, an abstract representa-tion of ad hoc EPCs is proposed using the articulated elements that are simple and manipu-lable. Major contributions of this framework include: the models of the abstract representa-tion of ad hoc EPCs on their structures, concepts and contexts; the semantic integration conditions of heterogeneous ad hoc EPCs; and a ConexNet of market network topology that captures the characteristics of ad hoc EPCs that are unevenly distributed in fragmented elec-tronic markets. Secondly, a three-layer CONEX information model is proposed to integrate ad hoc EPCs based on the PRODUCT MAP, which provides a trichotomy of systems, designers and users. The strategy behind the model is the separation of structure from concept and context, and hence they can be independently managed to resolve semantic conflicts between ad hoc EPCs. The major contributions of this model include the CONEX framework, collaboration mechanism and context transformation. The CONEX framework presents a formal characteri-sation and reconstruction of the structures of ad hoc EPCs based on a CONEX structure model and a CONEX grammar. It provides a formal specification for representing ad hoc EPCs including concept structure, classifier structure and mapping structure. The semantic conflicts in designing the concepts of ad hoc EPCs are resolved by a collaboration mecha-nism based on a semantic consistency model. The collaboration mechanism includes three key procedures: replicating unique concept identifiers and translating concept definitions be-tween common concepts of common EPCs; localising common concepts to local EPCs; and globalising local concepts to common EPCs. Users in the CONEX information model are not involved in any integration activities. They are provided with automatic and accurate concept exchange services through a mechanism of context transformation, which is designed based on an algorithm called Heterogeneous Concept Transformation. The separate integration of structures, concepts and contexts of ad hoc EPCs guarantees that the requirements of flexi-bility, evolvability and exactness of semantic integration have been met. Thirdly, the feasibility and features of the Collaborative Concept Exchange approach have been demonstrated in a prototype implementation that provides the services of collaborative concept design for semantic conflict resolution, and heterogeneous concept transformation for accurate and automatic concept exchange between ad hoc EPCs. A key contribution in the implementation level is the independent representation of the CONEX framework called XML PRODUCT MAP (XPM). XPM provides a feature of platform independence by con-forming to the standards of W3C XML, Simple Object Access Protocol and Web Services Description Language in both document specification and document transport. It is also a demonstration that the generic CONEX structure model and CONEX grammar can be imple-mented in any specific language such as XML for the particular scenarios of semantic integra-tion. With the aid of a collection of XPM document templates, two components called Con-cept Collaborator and Concept Transformer of the CONEX prototype are implemented to demonstrate how concepts are collaboratively designed to resolve semantic conflicts and how concepts are automatically and accurately exchanged between autonomous, heterogeneous and distributed ad hoc EPCs.
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Guo, Jingzhi. "Integrating Ad Hoc Electronic Product Catalogues Through Collaborative Maintenance of Semantic Consistency." Thesis, Griffith University, 2005. http://hdl.handle.net/10072/365489.
Full textAbstract:
Existing electronic markets are fragmented in the sense that each is an information island. The interoperation of product information between them is difficult especially in semantics communication. This prevents the formation of global electronic markets and the lowering distribution cost through market globalisation. The traditional and contemporary ap-proaches of product standardisation and ontology mediation could solve the problem only if all markets could adopt the same product standards, or mediation systems could mediate all heterogeneous standards and markets without semantic conflicts. However, problems generally exist in adopting a universal standard or mediating all markets through existing mediation systems. A reflection of the issue is that there are millions of ad hoc electronic product catalogues (EPCs) situated in small and medium sized enterprises (SMEs), where each EPC is a semantic community, often not aware of standards and mediation systems due to its ad hoc nature. This thesis focuses on the semantic integration of autonomous ad hoc EPCs, which are semantically inconsistent with each other. Firstly, a novel Collaborative Concept Exchange (CONEX) approach is developed for the se-mantic integration of ad hoc EPCs. Using this approach, a PRODUCT MAP is first built based on the theories of semiotic analysis and market segmentation. It functions as an analytical framework to articulate ad hoc EPCs, and answers the questions: what are the general char-acteristics of ad hoc EPCs, what are their heterogeneous relations, and how they are unevenly distributed in fragmented electronic markets. Within this framework, an abstract representa-tion of ad hoc EPCs is proposed using the articulated elements that are simple and manipu-lable. Major contributions of this framework include: the models of the abstract representa-tion of ad hoc EPCs on their structures, concepts and contexts; the semantic integration conditions of heterogeneous ad hoc EPCs; and a ConexNet of market network topology that captures the characteristics of ad hoc EPCs that are unevenly distributed in fragmented elec-tronic markets. Secondly, a three-layer CONEX information model is proposed to integrate ad hoc EPCs based on the PRODUCT MAP, which provides a trichotomy of systems, designers and users. The strategy behind the model is the separation of structure from concept and context, and hence they can be independently managed to resolve semantic conflicts between ad hoc EPCs. The major contributions of this model include the CONEX framework, collaboration mechanism and context transformation. The CONEX framework presents a formal characteri-sation and reconstruction of the structures of ad hoc EPCs based on a CONEX structure model and a CONEX grammar. It provides a formal specification for representing ad hoc EPCs including concept structure, classifier structure and mapping structure. The semantic conflicts in designing the concepts of ad hoc EPCs are resolved by a collaboration mecha-nism based on a semantic consistency model. The collaboration mechanism includes three key procedures: replicating unique concept identifiers and translating concept definitions be-tween common concepts of common EPCs; localising common concepts to local EPCs; and globalising local concepts to common EPCs. Users in the CONEX information model are not involved in any integration activities. They are provided with automatic and accurate concept exchange services through a mechanism of context transformation, which is designed based on an algorithm called Heterogeneous Concept Transformation. The separate integration of structures, concepts and contexts of ad hoc EPCs guarantees that the requirements of flexi-bility, evolvability and exactness of semantic integration have been met. Thirdly, the feasibility and features of the Collaborative Concept Exchange approach have been demonstrated in a prototype implementation that provides the services of collaborative concept design for semantic conflict resolution, and heterogeneous concept transformation for accurate and automatic concept exchange between ad hoc EPCs. A key contribution in the implementation level is the independent representation of the CONEX framework called XML PRODUCT MAP (XPM). XPM provides a feature of platform independence by con-forming to the standards of W3C XML, Simple Object Access Protocol and Web Services Description Language in both document specification and document transport. It is also a demonstration that the generic CONEX structure model and CONEX grammar can be imple-mented in any specific language such as XML for the particular scenarios of semantic integra-tion. With the aid of a collection of XPM document templates, two components called Con-cept Collaborator and Concept Transformer of the CONEX prototype are implemented to demonstrate how concepts are collaboratively designed to resolve semantic conflicts and how concepts are automatically and accurately exchanged between autonomous, heterogeneous and distributed ad hoc EPCs.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Computing and Information Technology
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Atutey, Olivia Abena. "Linear Mixed Model Selection via Minimum Approximated Information Criterion." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1594910831256966.
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Li, Nan. "Maximum Likelihood Identification of an Information Matrix Under Constraints in a Corresponding Graphical Model." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-theses/128.
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We address the problem of identifying the neighborhood structure of an undirected graph, whose nodes are labeled with the elements of a multivariate normal (MVN) random vector. A semi-definite program is given for estimating the information matrix under arbitrary constraints on its elements. More importantly, a closed-form expression is given for the maximum likelihood (ML) estimator of the information matrix, under the constraint that the information matrix has pre-specified elements in a given pattern (e.g., in a principal submatrix). The results apply to the identification of dependency labels in a graphical model with neighborhood constraints. This neighborhood structure excludes nodes which are conditionally independent of a given node and the graph is determined by the non- zero elements in the information matrix for the random vector. A cross-validation principle is given for determining whether the constrained information matrix returned from this procedure is an acceptable model for the information matrix, and as a consequence for the neighborhood structure of the Markov Random Field (MRF) that is identified with the MVN random vector.
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Kazzi, Rodrigue. "Risk bounds for unimodal distributions under partial information." Master's thesis, Instituto Superior de Economia e Gestão, 2018. http://hdl.handle.net/10400.5/15817.
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Mestrado em Actuarial ScienceNeste documento, começamos por estudar os limites superiores para Value-at-Risk, Tail-Value-at-Risk e Range-Value-at-Risk de distribuições unimodais quando apenas os limites superiores da média e da variância são conhecidos. Num primeiro passo, usamos o processo do ordenamento simples convexo para reduzir o problema de otimização a um problema de otimização paramétrico. Num segundo passo, resolvemos este problema de otimização paramétrico e obtemos soluções explícitas para todos os níveis de probabilidade. As nossas soluções são consistentes com as de Li et al. (2018), mas a sua análise é longa e as suas soluções limitadas ao caso em que as probabilidades se encontram no intervalo [5/6; 1[. Em segundo lugar, dado que a hipótese da não negatividade é comum nos estudos atuariais, estudamos como esta hipótese pode melhorar os limites superiores do Value-at-risk. Além disso, aplicamos a análise de dois passos para encontrar o limite superior do Value-at-Risk num cenário em que a função quantil é totalmente conhecida num intervalo específico de níveis de probabilidades. Por fim, avaliamos o risco do modelo que o modelo Beta gera numa carteira específica de créditos. Os resultados mostram que a adição da hipótese da unimodalidade e o conhecimento completo de uma parte da função quantil melhoram os limites superiores do risco. Por outro lado, a hipótese da não negatividade pode não trazer qualquer melhoria no caso de se verificar uma variância pequena ou na avaliação do Value-at-Risk a um nível de probabilidade baixo.
In this paper, we first start off by studying the upper-bounds for the Value-at-Risk, Tail-Value-at-Risk, and Range-Value-at-Risk of unimodal distributions when only their mean and their variance upper-bound are known. In a first step, we use a simple convex ordering argument to reduce the optimization problem to a parametric optimization problem. In a second step, we solve this parametric optimization problem and obtain explicit solutions for all probability levels. Our solutions conform well with those of Li et al. (2018), but their analysis is lengthy and their solutions are limited to the case in which probabilities are in the range [5/6;1[. Secondly, since the non-negativity assumption is common in actuarial studies, we study how this assumption can improve the upper bounds of the Value-at-Risk. Moreover, we utilize our two-step analysis to find the upper-bound of the Value-at-Risk in a scenario where the quantile function is fully trusted over a specific range of probability levels. Finally, we assess the model risk that a Beta model carries in a particular credit portfolio. Results show that the addition of unimodality assumption and the full knowledge of a part of the quantile function do offer an improvement on the risk upper bounds. On the other hand, the non-negativity assumption can lead to a non-improvement in the case of a small variance or an evaluation of the Value-at-Risk on a low probability level.
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Strekalovskiy, Evgeny [Verfasser], Daniel [Akademischer Betreuer] Cremers, and Antonin [Akademischer Betreuer] Chambolle. "Convex Relaxation of Variational Models with Applications in Image Analysis / Evgeny Strekalovskiy. Betreuer: Daniel Cremers. Gutachter: Daniel Cremers ; Antonin Chambolle." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1080299394/34.
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Geggis, Lorna M. "Do you see what I mean? : Measuring consensus of agreement and understanding of a National Weather Service informational graphic." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002119.
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Hu, Xu. "Towards efficient learning of graphical models and neural networks with variational techniques." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC1037.
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Dans cette thèse, je me concentrerai principalement sur l’inférence variationnelle et les modèles probabilistes. En particulier, je couvrirai plusieurs projets sur lesquels j'ai travaillé pendant ma thèse sur l'amélioration de l'efficacité des systèmes AI / ML avec des techniques variationnelles. La thèse comprend deux parties. Dans la première partie, l’efficacité des modèles probabilistes graphiques est étudiée. Dans la deuxième partie, plusieurs problèmes d’apprentissage des réseaux de neurones profonds sont examinés, qui sont liés à l’efficacité énergétique ou à l’efficacité des échantillonsIn this thesis, I will mainly focus on variational inference and probabilistic models. In particular, I will cover several projects I have been working on during my PhD about improving the efficiency of AI/ML systems with variational techniques. The thesis consists of two parts. In the first part, the computational efficiency of probabilistic graphical models is studied. In the second part, several problems of learning deep neural networks are investigated, which are related to either energy efficiency or sample efficiency
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Hägglund, Andreas, and Moa Källgren. "Impact of Engine Dynamics on Optimal Energy Management Strategies for Hybrid Electric Vehicles." Thesis, Linköpings universitet, Fordonssystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148890.
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In recent years, rules and regulations regarding fuel consumption of vehicles and the amount of emissions produced by them are becoming stricter. This has led the automotive industry to develop more advanced solutions to propel vehicles to meet the legal requirements. The Hybrid Electric Vehicle is one of the solutions that is becoming more popular in the automotive industry. It consists of an electrical driveline combined with a conventional powertrain, propelled by either a diesel or petrol engine. Two power sources create the possibility to choose when and how to use the power sources to propel the vehicle. The strategy that decides how this is done is referred to as an energy management strategy. Today most energy management strategies only try to reduce fuel consumption using models that describe the steady state behaviour of the engine. In other words, no reduction of emissions is achieved and all transient behaviour is considered negligible. In this thesis, an energy management strategy incorporating engine dynamics to reduce fuel consumption and nitrogen oxide emissions have been designed. First, the models that describe how fuel consumption and nitrogen oxide emissions behave during transient engine operation are developed. Then, an energy management strategy is developed consisting of a model predictive controller that combines the equivalent consumption minimization strategy and convex optimization. Results indicate that by considering engine dynamics in the energy management strategy, both fuel consumption and nitrogen oxide emissions can be reduced. Furthermore, it is also shown that the major reduction in fuel consumption and nitrogen oxide emissions is achieved for short prediction horizons.
Books on the topic "CONEX information model"
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Bâtcă-Dumitru, Graziella Corina, Adriana Florina Popa, Daniela Nicoleta Sahlian, Mihai Vuță, and Cleopatra Sendroiu. Contabilitate. Instrument de business pentru manageri. Editura Universitara, 2021. http://dx.doi.org/10.5682/9786062812577.
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Esti un antreprenor/manager aflat in cautarea de noi informatii privind intelegerea anumitor aspecte referitoare la situatia actuala, dinamica si perspectivele afacerii tale? Esti un contabil interesat de extinderea portofoliului de servicii din sfera contabilitatii prin interconectarea acestora cu informatii ce vizeaza analiza economico-financiara, procesul de luare a deciziilor si managementul riscurilor? Esti un student aflat in cautarea de informatii utile crearii unei imagini de ansamblu asupra contabilitatii si domeniilor conexe acesteia in vederea crearii unei viziuni holistice asupra unei afaceri? Daca esti in una din ipostazele de mai sus sau pur si simplu doresti sa afli mai mult despre modul de obtinere si utilizarea practica a unor informatii contabile, lucrarea Contabilitatea - instrument de business pentru manageri reprezinta un instrument util pentru indeplinirea obiectivelor vizate. In principal, cartea abordeaza aspecte specifice contabilitatii din Romania, plasate insa intr-un context international. In acest sens, obtinerea si utilizarea de informatii necesare deciziilor manageriale reprezinta, spre exemplu, un “limbaj international”. In plus, analiza performantei unei afaceri este prezentata in mod dual, atat din perspectiva continentala (franceza) cat si din cea anglo-saxona. Nu in ultimul rand, cititorul are ocazia de a-si asuma “riscul” de a incerca sa inteleaga rolul instrumentelor financiare, atat din perspectiva financiara cat si contabila, pentru a putea utiliza, ulterior, informatiile respective in procesul de gestionare a riscurilor existente in cadrul unei afaceri.
Book chapters on the topic "CONEX information model"
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Tatu, Marta, Brandon Iles, and Dan Moldovan. "Automatic Answer Validation Using COGEX." In Evaluation of Multilingual and Multi-modal Information Retrieval, 494–501. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-74999-8_59.
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Sarışın, Gözde, and Muhammed Salamah. "Cone Tessellation Model for Three-Dimensional Networks." In Communications in Computer and Information Science, 159–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21937-5_15.
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Martin, James, Jamie McClelland, Benjamin Champion, and David J. Hawkes. "Building Surrogate-Driven Motion Models from Cone-Beam CT via Surrogate-Correlated Optical Flow." In Information Processing in Computer-Assisted Interventions, 61–67. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07521-1_7.
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Barbaresco, Frederic. "Interactions between Symmetric Cone and Information Geometries: Bruhat-Tits and Siegel Spaces Models for High Resolution Autoregressive Doppler Imagery." In Emerging Trends in Visual Computing, 124–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00826-9_6.
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Chen, Lijian, and Dustin J. Banet. "Polynomial Approximation for Two Stage Stochastic Programming with Separable Objective." In Innovations in Information Systems for Business Functionality and Operations Management, 322–33. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-0933-4.ch019.
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In this paper, the authors solve the two stage stochastic programming with separable objective by obtaining convex polynomial approximations to the convex objective function with an arbitrary accuracy. Our proposed method will be valid for realistic applications, for example, the convex objective can be either non-differentiable or only accessible by Monte Carlo simulations. The resulting polynomial is constructed by Bernstein polynomial and norm approximation models. At a given accuracy, the necessary degree of the polynomial and the replications are properly determined. Afterward, the authors applied the first gradient type algorithms on the new stochastic programming model with the polynomial objective, resulting in the optimal solution being attained.
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Schwartz, Richard Evan. "The Nature of the Compactification." In The Plaid Model, 161–70. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691181387.003.0017.
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This chapter looks more closely at Theorem 15.1 and gives more information about the PET that appears in that result. The basic idea of the proof is to remove from the torus Ŝ the singular set, i.e., the places where the PET is not defined. What is left over is isometric to the interior of a convex parallelotope. Section 16.2 analyzes the singular set and Section 16.3 constructs X1. Section 16.4 constructs the second parallelotope based on the action of the PET from Theorem 15.1. The proof of Theorem 16.1 finishes at the end of Section 16.4. Section 16.5 restates the case of Theorems 15.1 and 16.1 that apply to the pinwheel map associated to outer billiards on a polygon without parallel sides. The result is Theorem 16.9. Finally, Section 16.7 shows how Theorems 0.4 and 16.9 match up.
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Schwartz, Richard Evan. "Pinwheels and Quarter Turns." In The Plaid Model, 143–52. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691181387.003.0015.
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This chapter is the first of three that will prove a generalization of the Graph Master Picture Theorem which works for any convex polygon P without parallel sides. The final result is Theorem 16.9, though Theorems 15.1 and 16.1 are even more general. Let θ denote the second iterate of the outer billiards map defined on R 2 − P. Section 14.2 generalizes a construction in [S1] and defines a map closely related to θ, called the pinwheel map. Section 14.3 shows that, for the purposes of studying unbounded orbits, the pinwheel map carries all the information contained in θ. Section 14.4 will defines another dynamical system called a quarter turn composition. A QTC is a certain kind of piecewise affine map of the infinite strip S of width 1 centered on the X-axis. Section 14.5 shows that the pinwheel map naturally gives rise to a QTC and indeed the pinwheel map and the QTC are conjugate. Section 14.6 explains how this all works for kites.
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Aletti, Giacomo, Paola Causin, Giovanni Naldi, and Matteo Semplice. "A Multiscale Computational Model of Chemotactic Axon Guidance." In Handbook of Research on Computational and Systems Biology, 628–45. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-491-2.ch028.
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In the development of the nervous system, the migration of neurons driven by chemotactic cues has been known since a long time to play a key role. In this mechanism, the axonal projections of neurons detect very small differences in extracellular ligand concentration across the tiny section of their distal part, the growth cone. The internal transduction of the signal performed by the growth cone leads to cytoskeleton rearrangement and biased cell motility. A mathematical model of neuron migration provides hints of the nature of this process, which is only partially known to biologists and is characterized by a complex coupling of microscopic and macroscopic phenomena. This chapter focuses on the tight connection between growth cone directional sensing as the result of the information collected by several transmembrane receptors, a microscopic phenomenon, and its motility, a macroscopic outcome. The biophysical hypothesis investigated is the role played by the biased re-localization of ligand-bound receptors on the membrane, actively convected by growing microtubules. The results of the numerical simulations quantify the positive feedback exerted by the receptor redistribution, assessing its importance in the neural guidance mechanism.
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Wang, Y., Z. Feng, KL Cheng, J. Zhang, L. Xu, TP Lam, ALH Hung, JCY Cheng, Y. Qiu, and WYW Lee. "Role of differentially expressed LBX1 in Adolescent Idiopathic Scoliosis (AIS) paraspinal muscle phenotypes and muscle-bone crosstalk through modulating myoblasts." In Studies in Health Technology and Informatics. IOS Press, 2021. http://dx.doi.org/10.3233/shti210425.
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AIS is three-dimensional spinal deformity with unclear etiopathogenesis. LBX1 is so far the only multi-centers validated AIS predisposing gene. The imbalance of posterior paraspinal muscles is an important factor in AIS etiopathogenesis. It is poorly understood how LBX1 contributes to the abnormal paraspinal muscles and onset/progression of AIS. We aimed to evaluate the expression of LBX1 in paraspinal muscles at the concave and convex side in AIS, and whether alternation of LBX1 expression could affect myoblastsactivities and potentially influence muscle-bone interaction via myokines expression. Paraspinal muscles from AIS and age- and curvature-matched congenital scoliosis (CS) patients were collected for fiber types analysis. Biopsies were also subjected to qPCR to validate expression of myogenic markers, selected myokines and LBX1. Human skeletal muscle myoblast (HSMM) was used for LBX1 loss-of-function study in vitro. Muscle fiber types analysis showed type I and type IIX/IIAX fibers proportion were significantly different between AIS concave and convex but not in two sides of CS. LBX1, myogenic markers and one myokine were significantly imbalanced in AIS but not in CS. Loss-of-function study showed knockdown of LBX1 could inhibit myogenic markers expression and myokines as well. This study provides new insight into the association between imbalanced paraspinal muscle and potential muscle-bone crosstalk in AIS patients and the biological function of predisposing gene LBX1. Further investigation with appropriate animal models is warranted to explore if asymmetric expression of LBX1 could result in distinct muscle phenotypes and bone qualities thus affect the progression of spine curvature in AIS.
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Yuzhakov, Sergey. "Reproduction of Images of Convex Figures by a Set of Stored Reference Surfaces." In Handbook of Research on Intelligent Data Processing and Information Security Systems, 264–88. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1290-6.ch011.
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Image processing is one of the important tasks of creating artificial intelligence. The methods for digital images processing are widely used by developers at this time. The parallel shift technology makes it possible to create alternative ways of describing and processing images. It involves the transformation of images not into a set of pixels, but into a set of functions that are organized in a certain way. The completeness of the system is determined by the ability to perform some basic tasks. Image processing includes image pre-processing, video data storage, various image manipulations, images restoration. This chapter discusses a mathematical model for the recovery of flat convex binary images. Images are restored on the basis of data generated by an image processing system based on parallel shift technology. Two methods are provided for determining the imaging area.
Conference papers on the topic "CONEX information model"
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Qiu, Li, Yong Li, Pan Hui, and Li Su. "Edge-Markovian dynamic graph based information dissemination model for mobile social networks." In The ACM CoNEXT Student Workshop. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/2079327.2079344.
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Buck, Steven L., and Roger Knight. "Model of dual rod pathways." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.fk2.
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We offer a model of dual rod pathways that incorporate recent psychophysical, physiological, and anatomical work. Flicker sensitivity studies suggest that one rod pathway, π0, has greater absolute sensitivity but poorer high temporal frequency responses than the other pathway, π0 (Conner, 1982; Connor and MacLeod, 1977; Sharpe, Stockman, and MacLeod, in press). The dual pathways may arise from differential electrical coupling of rods and cones via gap junctions as a function of adaptation level (Yang and Wu, 1989), so that π0 signals travel through rod pathways and π0 signals travel through cone pathways (Smith, Freed, and Sterling, 1986) before being recombined at ganglion cells or beyond. So far, the importance of dual rod pathways for processing other than temporal information is unclear. Our model of dual rod pathways generalizes their role to incremental and spatial processing and makes testable predictions to challenge the model. Predictions include more conelike spatial sensitivity for π0, differential dependence of π0 and π0 increment sensitivity on spatial and temporal parameters, and different interactions of cone signals with π0 and π0 in detection and adaptation. Support for the model comes in part from kinks in increment t.v.i. curves observed in various labs at –2 to 0 log scot td (the same as for flicker data).
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Mu¨ller, Andreas. "Geometric Characterization of the Configuration Space of Rigid Body Mechanisms in Regular and Singular Points." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84712.
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The kinematics of rigid body mechanisms is considered from a differential-geometric perspective. Geometric properties of a mechanism are intrinsically determined by the topology of its configuration space — the solution set of closure functions. The mechanism kinematics is usually characterized by the tangent space and tangent cone to the configuration space, i.e. by locally considering its topology. There are, however, mechanisms for which this is not sufficient. Generally, beside the topology, a complete picture of the kinematics needs both, the configuration space and the ideal generated by the closure functions. Tangent spaces/cones are differential-geometric objects associated to a variety. Two additional objects are introduced in this paper: the kinematic tangent space and the kinematic tangent cone. Three locally equivalent models for the mechanism kinematics are introduced. Due to their different mathematical nature the different models admit to apply specific mathematical tools. The analysis of model I is based on Lie group and screw algebraic methods, while model II and III are analyzed using methods from algebraic geometry. A computationally efficient algorithm for the construction of the kinematic tangent cone is presented. Its application is shown for several examples. A novel mechanism is presented of which the differential and local degree of freedom are different in regular points, so-called ‘paradox-in-the-small’.
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Trinkle, J. C., Stephen Berard, and J. S. Pang. "A Time-Stepping Scheme for Quasistatic Multibody Systems." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85266.
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Two new instantaneous-time models for predicting the motion and contact forces of three-dimensional, quasistatic multi-rigid-body systems are developed; one linear and one nonlinear. The nonlinear characteristic is the result of retaining the usual quadratic friction cone in the model. Discrete-time versions of these models provide the first time-stepping methods for such systems. As a first step to understanding their usefulness in simulation and manipulation planning, a theorem defining the equivalence of solutions of a time-stepping method for the nonlinear model and a global optimal solution of a related convex optimization problem is given. In addition, a Proposition giving necessary and sufficient conditions for solution uniqueness of the nonlinear time-stepping method is given. Finally, a simple example is discussed to help develop intuition about quasistatic systems and to solidify the reader’s understanding of the theorem and proposition.
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Thieu, Quang Tung, Marie Luong, Jean-Marie Rocchisani, Emmanuel Viennet, and Dat Tran. "Novel Convex Active Contour Model Using Local and Global Information." In 2011 International Conference on Digital Image Computing: Techniques and Applications (DICTA). IEEE, 2011. http://dx.doi.org/10.1109/dicta.2011.65.
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Záhora, Jiří, Zdeňek Hanzálek, and Michal Sojka. "Perception, Planning and Control System for Automated slalom with Porsche Panamera." In FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2020-acm-064.
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This paper describes an entire automated vehicle platform for software prototyping and demonstration. The project is build up with the cooperation of the Czech Technical University and Porsche Engineering Services company. The platform is based on a serial production car Porsche Panamera. The aim of this prototype is to close perception - planning - control loop and demonstrate it at a fully automated slalom ride. Besides the sensors already available in the stock Porsche Panamera car, our system is equipped with differential GPS, mono camera, and 16-layers LiDAR. The algorithms run on the NVIDIA TX2 platform, are integrated using Robotic Operating System (ROS) middleware and interface with the car ECUs via CAN and FlexRay buses. A Support Vector Machine with Histogram of Oriented Gradients (HoG) feature vectors from the camera image is used for cones classification. Cone localization is done relative to the car. It uses data from the camera and LiDAR. A Kalman filter derives accurate car odometry. It takes data from the GPS, car builtin accelerometer and actual speed and steers commands. The bicycle kinematic model is used to interconnect all of these pieces of information and for Kalman filter implementation. Clustering and filtering of all detected cones generate the cone map. Optimal trajectory planning respecting the car kinematics is crucial for the smooth slalom ride between the cones. A nonlinear quadratic optimization problem for this purpose is formulated and solved based on the bicycle model. Finally, the trajectory tracking control keeps the car on the planned slalom trajectory during the ride. Substantial work was devoted to experiments with a real vehicle and the fine - tuning of the system parameters. Validation of the system reveals interesting observations related to the precision, frequency and sensitivity of the system components and usability of ROS middleware for the autonomous driving tasks.
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Segala, David B., and Thomas A. Wettergren. "Parameter Exploration in Acoustic Scattering Model With Limited Model Information." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51786.
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In this paper, we fit we explore three different model approximation schemes in order to determine a representative model of measured data. As in many experimental settings where complex phenomenon is challenging to capture, limited sampled points of the physical process are known. However, there is knowledge of an upper and lower bounding solution. In the case where only the sampled points are known, a polynomial fit of order four (with only 5 known sampled points) produces a very crude fit with the largest amount of error. An average of the bounding solutions is able to provide a more accurate fit but still moderately crude. Finally, it is shown that the convex hull of the bounding solution with the sampled points is able to provide a fit with the least amount of error. We demonstrate this by predicting the target strength of an unknown acoustically scattering rigid sphere which is sampled at equally spaced frequencies over a vast range of frequency values.
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Huang, Lili, Liang Xiao, and Zhihui Wei. "An Improved Non-Convex Model for Multiplicative Noise Removal." In 2009 First International Conference on Information Science and Engineering. IEEE, 2009. http://dx.doi.org/10.1109/icise.2009.278.
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Amaral da Silva, Jefferson, and Karla Donato Fook. "COP-VW: Cone-over-Projection Directional Model Viewer." In 11th International Conference on Web Information Systems and Technologies. SCITEPRESS - Science and and Technology Publications, 2015. http://dx.doi.org/10.5220/0005449602450252.
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Hamza, Karim, and Mohammed Shalaby. "Convex Estimators for Optimization of Kriging Model Problems." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48566.
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This paper presents a framework for identification of the global optimum of Kriging models. The framework is based on a branch and bound scheme for sub-division of the search space into hypercubes while constructing convex under-estimators of the Kriging models. The convex under-estimators, which are a key development in this paper, provide a relaxation of the original problem. The relaxed problem has two key features: i) convex optimization algorithms such as sequential quadratic programming (SQP) are guaranteed to find the global optimum of the relaxed problem, and ii) objective value of the relaxed problem is a lower bound on the best attainable solution within a hypercube for the original (Kriging model) problem. The convex under-estimators improve in accuracy as the size of a hypercube gets smaller via the branching search. Termination of a hypercube branch is done when either: i) solution of the relaxed problem within the hypercube is no better than current best solution of the original problem, or ii) best solution of the original problem and that of the relaxed problem are within tolerance limits. To assess the significance of the proposed framework, comparison studies against genetic algorithm (GA) are conducted using Kriging models that approximate standard nonlinear test functions, as well as application problems of water desalination and vehicle crashworthiness. Results of the studies show the proposed framework deterministically providing a solution within tolerance limits from the global optimum, while GA is observed to not reliably discover the best solutions in problems with larger number of design variables.
Reports on the topic "CONEX information model"
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Melnyk, Yuriy. Academic Journal Website Model. KRPOCH, 2018. http://dx.doi.org/10.26697/preprint.melnyk.1.2018.
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Background: The tens of thousands of academic journal websites that are on the Internet today often do not have a clear organizational structure for their website. If most of them are convenient enough for readers (if the journal is open access), then many have problems informing authors about the conditions, the process of submitting and reviewing the manuscript. The Editorial Offices empirically populate the journal's website with content that can change dramatically (both in terms of website design and content) as the journal develops. Aim of Study: To develop a website model for an academic journal that takes into account the basic requirements for the preparation, publication, and archiving of high quality scientific manuscripts. Material and Methods: The academic journal website model is based on a structural-functional approach. The website content consists of text and integrated applications. This model takes into account the basic requirements for the preparation, publication, and archiving of high-quality open access scientific manuscripts, as well as the indexing of journal articles by leading indexing agencies. Results: The academic journal website model is structured with the following menu and submenu elements: 1. HOME: 1.1. Journal information; 1.2. From the editorial office; 1.3. Databases, Indexing; 2. EDITORIAL BOARD: 2.1. Editorial board; 2.2. Reviewers; 2.3. Editing and reviewing process; 3. EDITORIAL POLICIES: 3.1. Editorial policies; 3.2. Plagiarism policy; 3.3. Open access policy; 3.4. The ethics codex of scientific publications; 3.5. Disclaimer; 3.6. License terms; 3.7. Terms of publications (fee); 4. ARCHIV: 4.1. Previous issues; 4.2. Current issue; 4.3. Articles online first; 5. INSTRUCTIONS FOR AUTHORS: 5.1. General recommendations; 5.2. Manuscript templates; 5.3. Supplemental materials; 6. STATISTICS: 6.1. Publications; 6.2. Authors; 6.3. Readers; 7. CONTACTS: 7.1. Contact; 7.2. Subscriptions; 7.3. Search. Conclusions: This academic journal website model was implemented for the International Journal of Science Annals (IJSA). Authors and readers of IJSA noted the advantages of the model proposed by the author, including: a convenient and understandable website interface, the availability of the necessary hyperlinks to the pages of the journal's website and external media (sites of indexed agencies, library archives, etc.), convenient search for information on the website and published in the journal articles (by author, publication, text of the article), availability of integrated applications (online submission of manuscripts, filing appeals against the decision of reviewers and complaints about published articles, viewing the interactive printed version of the journal, etc.), availability of templates (for authors, reviewers), availability of multiple formats for archiving articles (PDF, DOAJ, XML, TXT), the ability to choose the style of citing the article and the website language (English, Ukrainian), etc. Keywords: journal, model, website, academic, indexing
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Hefetz, Abraham, and Justin O. Schmidt. Use of Bee-Borne Attractants for Pollination of Nonrewarding Flowers: Model System of Male-Sterile Tomato Flowers. United States Department of Agriculture, October 2003. http://dx.doi.org/10.32747/2003.7586462.bard.
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The use of bee natural product for enhancing pollination is especially valuable in problematic crops that are generally avoided by bees. In the present research we attempted to enhance bee visitation to Male Sterile (M-S) tomato flowers generally used in the production of hybrid seeds. These flowers that lack both pollen and nectar are unattractive to bees that learn rapidly to avoid them. The specific objects were to elucidate the chemical composition of the exocrine products of two bumble bee species the North American Bombus impatiens and the Israeli B. terrestris. Of these, to isolate and identify a bee attractant which when sprayed on M-S tomato flowers will enhance bee visitation, and to provide a procedure of the pheromone application regime. During the research we realized that our knowledge of B. impatiens is too little and we narrowed the objective to learning the basic social behavior of the bees and the pattern of foraging in a flight chamber and how it is affected by biogenic amines. Colonies of B. impatiens are characterized by a high number of workers and a relatively small number of queens. Size differences between queens and workers are pronounced and the queen seems to have full control over egg laying. Only about 9% of the workers in mature colonies had mature oocytes, and there were no signs of a "competition phase" as we know in B. terrestris. Queens and workers differ in their exocrine bouquet. Queen's Dufour's gland possesses a series of linear, saturated and unsaturated hydrocarbons whereas that of workers contains in addition a series of wax-type esters. Bees were trained to either visit or avoid artificially scented electronic flowers in a flight chamber. Since bee also learned to avoid scented non-rewarding flowers we attempted to interfere with this learning. We tested the effect of octopamine, a biogenic amine affecting bee behavior, on the choice behavior of free-flying bumblebees. Our results show that octopamine had no significant effect on the bees' equilibrium choice or on the overall rate of the behavioral change in response to the change in reward. Rather, octopamine significantly affected the time interval between the change in reward status and the initiation of behavioral change in the bee. In B. terrestris we studied the foraging pattern of the bees on tomato flowers in a semi commercial greenhouse in Yad Mordechai. Bee learned very quickly to avoid the non- rewarding M-S flowers, irrespective of their arrangement in the plot, i.e., their mixing with normal, pollen bearing flowers. However, bees seem to "forget" this information during the night since the foraging pattern repeats itself the next morning. Several exocrine products were tested as visitation enhancers. Among these, tarsal gland extracts are the most attractive. The compounds identified in the tarsal gland extract are mostly linear saturated hydrocarbons with small amounts of unsaturated ones. Application was performed every second day on leaves in selected inflorescences. Bee visitation increased significantly in the treated inflorescences as compared to the control, solvent treated. Treatment of the anthers cone was more effective than on the flower petals or the surrounding leaves. Methanol proved to be a non-flower-destructive solvent. We have shown that bumble bees (B. terrestris) can be manipulated by bee-borne attractants to visit non-rewarding flowers. We have further demonstrated that the bees learning ability can be manipulated by applying exogenously octopamine. Both methods can be additively applied in enhancing pollination of desired crops. Such manipulation will be especially useful in tomato cultivation for hybrid seed production.