10,413,273 results
Search Results
2. International Pynchon Week 2013: Call for Papers
- Author
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Samuel Thomas
- Subjects
lcsh:American literature ,History ,TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY ,Call for Papers, Conference, Thomas Pynchon ,Media studies ,Call for Papers ,Art history ,Performance art ,Conference ,Thomas Pynchon ,lcsh:PS1-3576 - Abstract
Call for papers for International Pynchon Week 2013 to be held at Durham University, UK from the 5th-8th of August 2013
- Published
- 1212
3. Power Plant Data Filtering Based on Gaussian Naive Bayesian Classification and Prediction Error Method
- Author
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Jiong Shen, Qianchao Wang, Nianci Lu, and Lei Pan
- Subjects
Imagination ,A priori probability ,Computer science ,business.industry ,Gaussian ,Mean squared prediction error ,media_common.quotation_subject ,010401 analytical chemistry ,System identification ,Pattern recognition ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,symbols.namesake ,Naive Bayes classifier ,symbols ,Artificial intelligence ,0210 nano-technology ,business ,Classifier (UML) ,media_common - Abstract
The sufficient utilization of the mega data acquired from operative power units is a promising way leading to high efficient, clean and safe operation of power plant. Hereinto, data filtering is a critical link to the data-driven dynamic model identification aiming at optimizing the process control. The machine learning is an advantageous approach for filtering usable data from mega databases for identification due to its effective statistical learning strategy to the field data with noises, disturbances and coupling quantities. Therefore, a data filtering method of combining Gaussian Naive Bayesian classifier and prediction error method (Gaussian NB-PEM) is proposed in this paper. Firstly, variables associated with identification model are selected by analyzing the characteristics of the process. Secondly, the GaussianNB classifier is used for coarse data filtering by calculating the priori probability of each attribute from training sample set and the probability with all possible values of the known categories for testing sample set. Thirdly, the prediction error method is used for further data filtering based on model fitting. By using the filtered closed-loop data, the dynamic characteristics of the superheated steam temperature is modeled and verified by closed-loop control simulation, showing the validity of the Gaussian NB-PEM data filtering method.
- Published
- 2019
4. SCAM: Semantic Caching Architecture for Efficient Content Matching over Data Grid
- Author
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Muhammad Abdul Qadir, Zohaib Mansoor Shams, Muhammad Farhan Bashir, and Raja Asad Zaheer
- Subjects
Semantic grid ,Data retrieval ,Database ,Data grid ,Computer science ,Distributed computing ,Semantic computing ,Search engine indexing ,Cache ,computer.software_genre ,computer ,Data warehouse ,Semantic matching - Abstract
Heterogeneous, distributed multi-databases (data warehouses, grids) are growing day by day as businesses demand more economical and flexible solutions for their data storage and processing needs. One of the main issues obstructing the large scale deployment of distributed multi-databases is latencies involved in data retrieval. Such problems are usually solved with the help of persistent caches. The paper presents a semantic caching architecture which supports faster semantic matching in query processing. This paper enhances the existing architecture of semantic cache and provides the mapping of hierarchical indexing scheme over it with the help of case study in order to represent the working of architecture. This paper also provides experimental results of the query processing over updated architecture and provides the discussion over comparison of the extended architecture with the previously proposed architecture.
- Published
- 2007
5. Water occurrence in lignite and its interaction with coal structure
- Author
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Xiangchun Liu, Chuanyong Yan, Jie Liu, Xiangang Jiang, Lianzhen Mao, Li Feng, and Chuanzhou Yuan
- Subjects
Moisture ,business.industry ,Chemistry ,020209 energy ,General Chemical Engineering ,Organic Chemistry ,Binding energy ,Energy Engineering and Power Technology ,02 engineering and technology ,medicine.disease ,Dewatering ,Chemical reaction ,Pore water pressure ,Fuel Technology ,020401 chemical engineering ,Chemical engineering ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,Coal ,Dehydration ,0204 chemical engineering ,Fourier transform infrared spectroscopy ,business - Abstract
Essentially, the difficulty in dehydration technology of lignite depends on the energy state of water in lignite. The fundamental understanding of the water occurrence and energy state in lignite as well as its physical-chemical interaction with coal structure is helpful to the upgrading of lignite. In this paper, the water occurrence in lignite and the changes of oxygen-containing functional groups, pore structure, and water holding capacities at different drying temperatures were researched by DSC, NMR, FTIR and BET, respectively. The binding energies (calculated by DFT using model compounds) of different forms of water in lignite were also summarized. The relationships between energy state and occurrence mode of water in lignite as well as dehydration difficulty and structural changes during dewatering were clarified. The Results show that the energy state of water in lignite divided into three levels. The water in free and pore is in the lowest energy level. Its binding force with coal is pretty weak. So this type of water is easily vaporized and re-adsorbed. It is the main in removed moisture. Generally, the temperature removed free water mainly focused on below 100 °C, and the dehydration temperature of pore water mainly focused on 100–200 °C. The water bonded in hydrogen-bond and capillary confinement is in the middle energy level. The dehydration temperature mainly focused on 200–400 °C. The oxygen-containing functional groups of samples change a little and the re-adsorbed property improves a little after dehydrated. The water mainly produced by chemical reaction above 400 °C is in the highest energy level. Though this type of water does not belong to the natural occurrence of water in lignite, the re-adsorbed property improves much, and it plays the key role in stabilizing the dehydrated lignite interface.
- Published
- 2018
6. Llibre judiciari de la Cort del Molinell
- Author
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El Molinell
- Subjects
book ,Culla ,cort ,judiciari - Abstract
215 x 160 mm. Péssim estat de conservació (paper desfent-se per l´humitat, no se poden passar les fulles; aprox. 25 fl.). Relligat amb un pergamí de 1362 que només cobreix la part posterior del quadern. Llibre judiciari de la Cort del Molinell
- Published
- 1410
7. Gravity in Gravity’s Rainbow – Force, Fictitious Force, and Frame of Reference; or: The Science and Poetry of Sloth
- Author
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Nina Engelhardt
- Subjects
Gravity's Rainbow ,Physics ,lcsh:American literature ,Gravity (chemistry) ,Science, Gravity, Ethics ,Rainbow ,Frame of reference ,Gravitation ,symbols.namesake ,Theoretical physics ,General Relativity and Quantum Cosmology ,Theory of relativity ,Fictitious force ,symbols ,Einstein ,Relation (history of concept) ,lcsh:PS1-3576 - Abstract
Gravity is a prominent physical concept in 'Gravity's Rainbow', as already announced by the novel's title. If the second part of the title – the poetic image of the rainbow – is bound up with mathematical formulas and the parabolic path of the Rocket, so conversely, this paper argues, Pynchon's novel introduces a relation between gravity and fiction. The paper explores 'Gravity's Rainbow''s use of the changing historical understandings of gravitation from the seventeenth to the twentieth centuries by examining the novel's illustration of Newton and Leibniz's opposed concepts as well as its references to gravity as understood in Einstein's theory of relativity. When tracing the notions of gravity as force, fictitious force, and frame of reference, a particular focus lies on the relation of physical imagery to ethical questions and on the way 'Gravity's Rainbow' provides a physico-ethical explanation of Slothrop's disappearance from the novel.
- Published
- 1414
8. Access to Finance and Investment: Does Profit Sharing Dominate Debt?
- Author
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Nabi, Mahmoud Sami
- Subjects
Profit sharing ,debt contract ,moral hazard - Abstract
This paper compares sharing (equity) and debt contracts in presence of moral hazard which manifests as the hidden effort undertaken by the entrepreneur. The originality of this paper relatively to the existing studies consists in performing the comparison between the two types of contracts while considering a more general context along two dimensions. The first dimension is enabling the internal funds of the entrepreneur to vary between 0% and a level just inferior to 100%. The second dimension is the incorporation of an incentive mechanism to the sharing contract in the context of a two‐period relationship. I showed that the sharing and debt contracts are feasible when the internal funds of the entrepreneur are superior to determined thresholds. These thresholds depend on the characteristics of the project (size, payoffs, and probability of success/failure) and the opportunity cost of the financier. The debt contract is shown to be characterized by larger financial access than the sharing contract. I have also shown that the enlargement of the financial‐relationship to two periods has an incentivizing effect on the entrepreneur and enlarges the region of financial access for the two types of contracts, if a common condition of sufficiently foresighted entrepreneur is satisfied. However, two distinct conditions are also necessary for the enlargement of the financial access to occur. For the sharing contract, the second condition is related to the size of the project which should be inferior to a determined threshold. For the debt contract, the second condition is related to the threat of non‐renewal of the financing in case of first‐period failure, which should be sufficiently stringent. In addition, it has been shown that the more restrictive the threat of non‐renewal the larger the region of financial access. However, this is realized at the expense of the second period investment which decreases, and represents the economic efficiency’ effect of the debt contract. Finally, I discussed the effect on the financial access of taxing the “risk‐free” financial operation and subsidizing the “higher effort” of the insufficiently‐capitalized entrepreneurs.
- Published
- 1437
9. Self-supervised web search for any-k complete tuples
- Author
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Alexander Löser, Christoph Boden, Christoph Nagel, and Stephan Pieper
- Subjects
Web search query ,Information retrieval ,Relation (database) ,Computer science ,InformationSystems_DATABASEMANAGEMENT ,02 engineering and technology ,Query expansion ,Web query classification ,020204 information systems ,Web page ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Conjunctive query ,Tuple ,Boolean conjunctive query - Abstract
A common task of Web users is querying structured information from Web pages. In this paper we propose a novel query processor for systematically discovering any-k relations from Web search results with conjunctive queries. The 'any-k' phrase denotes that retrieved tuples are not ranked by the system.For realizing this interesting scenario the query processor transfers a structured query into keyword queries that are submitted to a search engine, forwards search results to relation extractors, and then combines relations into result tuples.Unfortunately, relation extractors may fail to return a relation for a result tuple. We propose a solid information theory-based approach for retrieving missing attribute values of partially retrieved relations. Moreover, user-defined data sources may not return at least k complete result tuples. To solve this problem, we extend the Eddy query processing mechanism [14] for our 'querying the Web' scenario with a continuous, adaptive routing model. The model determines the most promising next incomplete row for returning any-k complete result tuples at any point during the query execution process.We report a thorough experimental evaluation over multiple relation extractors. Our experiments demonstrate that our query processor returns complete result tuples while processing only very few Web pages.
- Published
- 2011
10. Testing of Tight Crimped Joint Made on a Prototype Stand
- Author
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Michał Rejek, Grzegorz Królczyk, Nikodem Wróbel, and Sergej Hloch
- Subjects
Engineering ,business.industry ,020208 electrical & electronic engineering ,Automotive industry ,02 engineering and technology ,Structural engineering ,01 natural sciences ,010309 optics ,Work (electrical) ,0103 physical sciences ,Heat exchanger ,0202 electrical engineering, electronic engineering, information engineering ,Joint (building) ,business - Abstract
The paper presents a project of a prototype solution of a device for making inseparable crimped joints consisting in forming the material of two elements to be joined to each other with the use of punches. The work contains the assessment and analysis of the joints made in the stand with the use of various forming tools. Furthermore, the paper presents the analysis of the characteristic features of the new joints, as well as dependences in strength tests. The elements joined on the machine had been made of 5754 aluminium. This material and the presented joint are used in the construction of heat exchangers, such as water, oil coolers or condensers in the automotive or aircraft branch.
- Published
- 2017
11. Parametric Identification of a Positioning System for a Billets Unloading Machine
- Author
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D.C. Dumitrache, I. Inoan, and T. Szelitzky
- Subjects
Engineering ,Identification (information) ,Process modeling ,Positioning system ,Automatic control ,business.industry ,Process (computing) ,Control engineering ,General Medicine ,Parametric identification ,business ,Parametric statistics - Abstract
In this paper we present a parametric method for the identification of a horizontal positioning system for a billets unloading machine. The input-output models are obtained on the experimental models and on the priori information of the process. The obtained models are represented as second-order underdamped systems. The assessment of the models is made via simulation and a best fit model follows. In order to improve the current process performances, new automatic control structures for the positioning process can be derived using the determined model
- Published
- 2012
12. Identification of an unknown extraneous contaminant in pharmaceutical product analysis
- Author
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Min Li, Abu M. Rustum, and Mingxiang Lin
- Subjects
Chromatography ,Molecular Structure ,Chemistry ,Clinical Biochemistry ,Pharmaceutical Science ,External source ,Mass spectrometry ,Guanidines ,Mass Spectrometry ,Dosage form ,Analytical Chemistry ,Molecular Weight ,Product analysis ,Identification (information) ,Pharmaceutical Preparations ,Liquid chromatography–mass spectrometry ,Drug Discovery ,Spectrophotometry, Ultraviolet ,Potential source ,Drug analysis ,Drug Contamination ,Chromatography, High Pressure Liquid ,Spectroscopy ,Tablets - Abstract
During the content uniformity test of a drug product (tablet formulation), an unknown peak was observed in the HPLC chromatograms. Upon further investigation, it was determined that the unknown peak was originated from an external source and, therefore, the drug product is free of this unknown peak. The next step was to identify the structure of this unknown peak in order to determine the source of this contaminant species. In this paper, we wish to present the strategy and the results of the experiments that led to the identification of this unknown peak. LC-PDA/UV and LC-MS(n) analyses were conducted to obtain the UV spectrum, molecular weight and MS(n) fragmentation pathways of the unknown peak. The MS analysis revealed certain structural features of the unknown species and a number of model compounds that contain such features were then examined for their UV absorbance profiles in an attempt to establish the functional group connectivity within the unknown species. A careful examination of these results in conjunction with the determination of the high-resolution molecular weight led to a short list of potential candidates for the unknown species, among which the most likely one was 1,3-diphenylguanidine. The identification of the unknown contaminant was confirmed by spiking experiments using the authentic compound. The potential source of this contaminant was also identified as derived from the safety filler of the pipette bulb used to prepare the sample solutions during the drug analysis.
- Published
- 2007
13. Multivariate Statistical Process Control Based on Principal Component Analysis: Implementation of Framework in R
- Author
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J. C. Velosa, Sandra Sousa, Ana Cristina Braga, Cláudia Barros, Isabel Delgado, Cristina Martins, Pedro L. Delgado, Paulo Sampaio, and Universidade do Minho
- Subjects
Control charts ,0209 industrial biotechnology ,Science & Technology ,Computer science ,Multivariate Statistical Process Control (MSPC) ,02 engineering and technology ,R language ,Multivariate statistical process control ,020901 industrial engineering & automation ,020401 chemical engineering ,Statistics ,Principal component analysis ,Contribution plots ,Control chart ,0204 chemical engineering ,Principal Component Analysis (PCA) - Abstract
The interest in multivariate statistical process control (MSPC) has increased as the industrial processes have become more complex. This paper presents an industrial process involving a plastic part in which, due to the number of correlated variables, the inversion of the covariance matrix becomes impossible, and the classical MSPC cannot be used to identify physical aspects that explain the causes of variation or to increase the knowledge about the process behaviour. In order to solve this problem, a Multivariate Statistical Process Control based on Principal Component Analysis (MSPC-PCA) approach was used and an R code was developed to implement it according some commercial software used for this purpose, namely the ProMV (c) 2016 from ProSensus, Inc. (www.prosensus.ca). Based on used dataset, it was possible to illustrate the principles of MSPC-PCA. This work intends to illustrate the implementation of MSPC-PCA in R step by step, to help the user community of R to be able to perform it., FCT - Fundação para a Ciência e a Tecnologia(UID/CEC/00319/2013)
- Published
- 2018
14. On the Determination of Subjective Probability by Choices
- Author
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Edi Karni and Philippe Mongin
- Subjects
Property (philosophy) ,subjective probability, subjective expected utility, state-dependent utility ,Strategy and Management ,Welfare economics ,Representation (systemics) ,Subjective expected utility ,Uniqueness ,Management Science and Operations Research ,Preference relation ,Mathematical economics ,Stability (probability) ,Axiom ,Mathematics - Abstract
The paper explores the uniqueness properties of the subjective probabilities in two axiomatizations of state-dependent preferences. Karni, Schmeidler, and Vind's (KSV 1983) system depends on selecting an arbitrary auxiliary probability, and as such, does not guarantee the uniqueness of the derived subjective probability. However, an axiom system initially designed by Karni and Schmeidler (KS 1981) and further elaborated upon here does guarantee the desired uniqueness as well as a useful property of “stability” of the derived solution. When the preference relation displays state-independence, even the KS probabilities may not agree with those derived from the classic Anscombe-Aumann (AA 1963) theorem. However, we claim that, in this case, the KS rather than the AA probabilities are the appropriate representation of the agent's beliefs.
- Published
- 2000
15. Parental experiences with an adolescent female and male with Autism Spectrum Disorder (ASD) in India
- Author
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Naureen Bhullar
- Subjects
Challenging behaviour ,Cognitive Neuroscience ,05 social sciences ,Perspective (graphical) ,Psychological intervention ,medicine.disease ,Developmental psychology ,03 medical and health sciences ,Psychiatry and Mental health ,Social support ,0302 clinical medicine ,Neurology ,Autism spectrum disorder ,Spouse ,Legal guardian ,Developmental and Educational Psychology ,medicine ,0501 psychology and cognitive sciences ,Neurology (clinical) ,Personal experience ,Psychology ,030217 neurology & neurosurgery ,050104 developmental & child psychology - Abstract
Purpose The purpose of this paper is to compare experiences of two parents of adolescents with Autism Spectrum Disorder (ASD) differing in gender, including their daily routines at school and at home, challenging behaviour, social support and future plans for their children. Design/methodology/approach The parents of the two adolescents with ASD were interviewed with open-ended questions related to their children as well as their personal experiences, along with getting their individual responses for the established Satisfaction with Life Scale (SWLS). Findings There were similarities and differences in the parents’ experiences with their adolescent children with ASD. Similarities included a limited social support outside their families, hopes for the future of their children, where in they emphasised the need for some “normality” for their child, and a lack of plan in terms of legal guardianship and written wills after their own time. Some of the differences were also noted in the parents’ description of symptoms of their children, with the father of the female adolescent reporting more negative experiences both with his child, as well as with his spouse, a lack of social support and, subsequently, more “dissatisfaction” on the SWLS than the mother of the male adolescent. Research limitations/implications One of the major limitations of this study is the absence of feedback from the other parent besides the one being interviewed, due to which only one parental perspective was provided here. Social implications There are vital social implications of this study. Both parents reported a limited social support due to which they expressed the need for increasing awareness for ASD in the general society. These findings illustrate the need for a focus on designing interventions for improving outcomes for both parent and child in similar situations. Originality/value This study compared the experiences of two parents of adolescents with ASD, differing in gender and symptomology, but similar in other respects, including the family demographic characteristics and cultural context.
- Published
- 2019
16. Popular Religion in America: Symbolic Change and the Modernization Process in Historical Perspective. By Peter W. Williams. Prentice-Hall Studies in Religion. Englewood Cliffs, N.J.: Prentice-Hall, 1980. 258 pp. $7.95 paper
- Author
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Grant Wacker
- Subjects
History ,Sociology and Political Science ,Process (engineering) ,Political economy ,Perspective (graphical) ,Religious studies ,Economic history ,Sociology ,Modernization theory - Published
- 1981
17. Discrete rational 𝐿_{𝑝} approximation
- Author
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Jerry M. Wolfe
- Subjects
Algebra ,Computational Mathematics ,Algebra and Number Theory ,Applied Mathematics ,Mathematics - Abstract
In this paper, the problem of approximating a function defined on a finite subset of the real line by a family of generalized rational functions whose numerator and denominator spaces satisfy the Haar conditions on some closed interval [a, b] containing the finite set is considered. The pointwise closure of the family restricted to the finite set is explicitly determined. The representation obtained is used to analyze the convergence of best approximations on discrete subsets of [a, b] to best approximations over the whole interval (as the discrete subsets become dense) in the case that the function approximated is continuous on [a, b] and the rational family consists of quotients of algebraic polynomials. It is found that the convergence is uniform over [a, b] if the function approximated is a so-called normal point. Only L p {L_p} norms with 1 ⩽ p > ∞ 1 \leqslant p > \infty are employed.
- Published
- 1975
18. Using theory of regions with selective siphon control for deadlock prevention policy in Petri nets
- Author
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Yen-Liang Pan, Yi-Sheng Huang, Sheng-Luen Chung, and MuDer Jeng
- Subjects
Theoretical computer science ,Computer science ,Control theory ,Reachability ,Control system ,Graph (abstract data type) ,Siphon ,Deadlock ,Petri net ,Optimal control ,Deadlock prevention algorithms - Abstract
Deadlock prevention policies are used to solve the deadlock problems of FMSs. The theory of regions is recognized as the unique method for obtaining maximally permissive (i.e., optimal) controllers in the existing literature. In this paper, the selective siphons and critical markings method [17] is merged in the new deadlock prevention policy. First of all, reachability graph is still needed. Second, CMTSIs are identified. Further, selective siphons and critical markings method is used to check if all dead/quasi-dead markings of CMTSIs are covered by these selective siphons. Furthermore, choose anyone CMTSI that belongs to a same selective siphon to be processed. Finally, controllers are therefore obtained. Experimental results indicate that the computational cost can be reduced again. Besides, it is the most efficient policy to obtain maximal permissive behavior of Petri net models.
- Published
- 2012
19. Influence of fibre orientation, tool geometry and process parameters on surface quality in milling of CFRP
- Author
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Konrad Wegener, Friedrich Kuster, Lukas Seeholzer, and Robert Voss
- Subjects
0209 industrial biotechnology ,business.industry ,Chip formation ,Abrasive ,Delamination ,Geometry ,02 engineering and technology ,Edge (geometry) ,021001 nanoscience & nanotechnology ,Industrial and Manufacturing Engineering ,020901 industrial engineering & automation ,Machining ,Cemented carbide ,Composite material ,Tool wear ,0210 nano-technology ,Aerospace ,business - Abstract
Machining of highly abrasive carbon fibre reinforced polymer (CFRP) in the aerospace industry requires processes with excellent machining quality, sufficient tool lifetime and short cycle times. To reach these goals a detailed understanding of the physics of cutting and chip formation based on the tool geometry is necessary. This paper presents a fundamental study in milling of unidirectional CFRP focussing on variable process parameters, tool geometries and fibre orientations. A single-edged tool with cemented carbide inserts of variable macro geometry is utilised. The experiments are evaluated by 3D microscopy of the milled edges, detailed tool wear analyses and interpretation of cutting forces. The key conclusions from the experimental results are drawn to reach a better machining quality and increased tool lifetime. The delamination of top layer fibres from the ply below up to a certain distance from the milled edge, which depends on the forces at fibre cutting angle ϕ = 90°, has been identified as main quality issue. Force and tool wear models based on the measurement data are presented.
- Published
- 2017
20. Use of semi-empirical molecular orbital theory for study of electronic structures of transition metal complexes
- Author
-
Richard F. Fenske
- Subjects
Ligand field theory ,Theoretical physics ,Transition metal ,Chemistry ,Non-bonding orbital ,General Chemical Engineering ,Molecular orbital diagram ,Molecular orbital theory ,Molecular orbital ,General Chemistry ,Molecular physics ,Interpretation (model theory) - Abstract
The intention of this paper is to set forth for a potential user of approximate molecular orbital methods some of the precautions to be considered in their application and in the interpretation of the results.
- Published
- 1988
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