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Generation Method (generation + method)
Selected AbstractsFacile Generation Method for Conjugated Allenyl Esters Based on Retro-Dieckmann-Type Ring-Opening Reactions.CHEMINFORM, Issue 31 2005Shigeki Sano Abstract For Abstract see ChemInform Abstract in Full Text. [source] Semantic patterns for user-interactive question answeringCONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 7 2008Tianyong Hao Abstract A new type of semantic pattern is proposed in this paper, which can be used by users to post questions and answers in user-interactive question answering (QA) systems. The necessary procedures of using semantic patterns in a QA system are also presented, which include question structure analysis, pattern matching, pattern generation, pattern classification and answer extraction. Both the manual creation method and the automatic generation method are proposed for patterns for different applications. A pattern instantiation level metrics is also presented for the predication of the quality of generated or learned patterns. We implemented a user interface for using the semantic pattern in our QA system, which allows users to effectively post and answer questions. Copyright © 2007 John Wiley & Sons, Ltd. [source] Octree-based reasonable-quality hexahedral mesh generation using a new set of refinement templatesINTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Issue 13 2009Yasushi Ito Abstract An octree-based mesh generation method is proposed to create reasonable-quality, geometry-adapted unstructured hexahedral meshes automatically from triangulated surface models without any sharp geometrical features. A new, easy-to-implement, easy-to-understand set of refinement templates is developed to perform local mesh refinement efficiently even for concave refinement domains without creating hanging nodes. A buffer layer is inserted on an octree core mesh to improve the mesh quality significantly. Laplacian-like smoothing, angle-based smoothing and local optimization-based untangling methods are used with certain restrictions to further improve the mesh quality. Several examples are shown to demonstrate the capability of our hexahedral mesh generation method for complex geometries. Copyright © 2008 John Wiley & Sons, Ltd. [source] Towards automatic structured multiblock mesh generation using improved transfinite interpolationINTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Issue 5 2008C. B. AllenArticle first published online: 4 OCT 200 Abstract The quality of any numerical flowfield solution is inextricably linked to the quality of the mesh used. It is normally accepted that structured meshes are of higher quality than unstructured meshes, but are much more difficult to generate and, furthermore, for complex topologies a multiblock approach is required. This is the most resource-intensive approach to mesh generation, since block structures, mesh point distributions, etc., need to be defined before the generation process, and so is seldom used in an industrial design loop, particularly where a novice user may be involved. This paper considers and presents two significant advances in multiblock mesh generation: the development of a fast, robust, and improved quality interpolation-based generation scheme and a fully automatic multiblock optimization and generation method. A volume generation technique is presented based on a form of transfinite interpolation, but modified to include improved orthogonality and spacing control and, more significantly, an aspect ratio-based smoothing algorithm that removes grid crossover and results in smooth meshes even for discontinuous boundary distributions. A fully automatic multiblock generation scheme is also presented, which only requires surface patch(es) and a target number of mesh cells. Hence, all user input is removed from the process, and a novice user is able to obtain a high-quality mesh in a few minutes. It also means the code can be run in batch mode, or called as an external function, and so is ideal for incorporation into a design or optimization loop. To demonstrate the power and efficiency of the code, multiblock meshes of up to 256 million cells are presented for wings and rotors in hover and forward flight. Copyright © 2007 John Wiley & Sons, Ltd. [source] Local identification of prototypes for genetic learning of accurate TSK fuzzy rule-based systemsINTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS, Issue 9 2007R. Alcalá This work presents the use of local fuzzy prototypes as a new idea to obtain accurate local semantics-based Takagi,Sugeno,Kang (TSK) rules. This allow us to start from prototypes considering the interaction between input and output variables and taking into account the fuzzy nature of the TSK rules. To do so, a two-stage evolutionary algorithm based on MOGUL (a methodology to obtain Genetic Fuzzy Rule-Based Systems under the Iterative Rule Learning approach) has been developed to consider the interaction between input and output variables. The first stage performs a local identification of prototypes to obtain a set of initial local semantics-based TSK rules, following the Iterative Rule Learning approach and based on an evolutionary generation process within MOGUL (taking as a base some initial linguistic fuzzy partitions). Because this generation method induces competition among the fuzzy rules, a postprocessing stage to improve the global system performance is needed. Two different processes are considered at this stage, a genetic niching-based selection process to remove redundant rules and a genetic tuning process to refine the fuzzy model parameters. The proposal has been tested with two real-world problems, achieving good results. © 2007 Wiley Periodicals, Inc. Int J Int Syst 22: 909,941, 2007. [source] A Simulation-based Production Scheduling Method for Minimizing the Due-date-deviationINTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH, Issue 2 2002Masahiro Arakawa A simulation-based scheduling method for minimizing the due-date-deviation is proposed on the basis of the combination of the BFHS (backward/forward hybrid simulation) method and the parameter-space-search-improvement method. A new schedule generation method named the BFHS/type-D is first developed, in which the information generated during the backward simulation is utilized to control operation-onset timings and job priorities in the forward simulation. Then, after investigation of the backward-simulation characteristics, two parameters are proposed to manipulate the simulation process systematically in relation to due-date-deviation. Furthermore, the best schedule with respect to due-date-deviation is searched for on the space spanned by the two parameters. Finally, the effectiveness and efficiency of the proposed method are demonstrated, not only on a simple job-shop model, but also on a practical large-scale system. [source] The ethics of research using electronic mail discussion groupsJOURNAL OF ADVANCED NURSING, Issue 5 2005Debbie Kralik PhD RN Aim., The aim of this paper is to identify and discuss the ethical considerations that have confronted and challenged the research team when researchers facilitate conversations using private electronic mail discussion lists. Background., The use of electronic mail group conversations, as a collaborative data generation method, remains underdeveloped in nursing. Ethical challenges associated with this approach to data generation have only begun to be considered. As receipt of ethics approval for a study titled; ,Describing transition with people who live with chronic illness' we have been challenged by many ethical dilemmas, hence we believe it is timely to share the issues that have confronted the research team. These discussions are essential so we can understand the possibilities for research interaction, communication, and collaboration made possible by advanced information technologies. Discussion., Our experiences in this study have increased our awareness for ongoing ethical discussions about privacy, confidentiality, consent, accountability and openness underpinning research with human participants when generating data using an electronic mail discussion group. We describe how we work at upholding these ethical principles focusing on informed consent, participant confidentiality and privacy, the participants as threats to themselves and one another, public,private confusion, employees with access, hackers and threats from the researchers. Conclusion., A variety of complex issues arise during cyberspace research that can make the application of traditional ethical standards troublesome. Communication in cyberspace alters the temporal, spatial and sensory components of human interaction, thereby challenging traditional ethical definitions and calling to question some basic assumptions about identity and ones right to keep aspects of it confidential. Nurse researchers are bound by human research ethics protocols; however, the nature of research by electronic mail generates moral issues as well as ethical concerns. Vigilance by researchers is required to ensure that data are viewed within the scope of the enabling ethics approval. [source] Bio-mimetic trajectory generation using a neural time-base generatorJOURNAL OF FIELD ROBOTICS (FORMERLY JOURNAL OF ROBOTIC SYSTEMS), Issue 11 2005Yoshiyuki Tanaka This paper presents a neural time-base generator (TBG) that can generate a family of neural control signals with a controllable finite duration and bell-shaped velocity profile. Then, a bio-mimetic trajectory generation method using the neural TBG model is explained. Using the proposed model, the generation ability of human-like trajectories is examined through comparisons between computer simulations and human arm trajectories during reaching movements according to the curvature of constrained trajectories. © 2005 Wiley Periodicals, Inc. [source] Phase and amplitude recovery and diffraction image generation method: structure of Sb/Au(110),,3,×,,3R54.7° from surface X-ray diffractionACTA CRYSTALLOGRAPHICA SECTION A, Issue 3 2007R. Fung The discovery that the phase problem of diffraction from non-periodic objects may be solved by oversampling the diffraction intensities in reciprocal space with respect to a Nyquist criterion has opened up new vistas for structure determination by diffraction methods. A similar principle may be applied to the problem of surface X-ray diffraction (SXRD), where, owing to the breaking of a crystal periodicity normal to its surface, diffraction data consist of a set of superstructure rods (SRs) due to scattering from the parts of the surface whose structure is different from that of the truncated bulk and of crystal truncation rods (CTRs), formed by interfering contributions from the surface and the bulk. A phase and amplitude recovery and diffraction image generation method (PARADIGM) is described that provides a prescription for finding the unmeasured amplitudes and phases of the surface contributions to the CTRs in addition to the phases of the SRs, directly from the diffraction data. The resulting `diffraction image' is the basis of a determination of the previously unknown multidomain structure of Sb/Au(110),,3,×,,3R54.7°. [source] | ||||||||||||||||