1,721,411 research outputs found
Visual measurement of a 3-D plane pose by a cylindrical structured light
Full text linkproceedings of the 1993 IEEWRSJ Inumauonal Conference on Intelligent Robots and Systems Yokohama, Japan July 26-30.199
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cold-flow simulation of municipal waste incinerators
No full textConfigurations of combustion chamber and air distribution are major parameters that influence theperformance of incinerators. Cold-flow simulations have been performed experimentally and numerically for selected designs of grate-type municipal waste incinerators. Counterflow and parallel-flow arrangements are considered for the combustion chamber configuration. Two-dimensional water table models of 1/20 scale were made for cold-flow tests, and numerical models have been developed. Flow visualizations using water table flow models and computational results using the numerical model are in good agreement. Velocity vector fields and concentrations of tracer gases are evaluated, and the effects of combustion chamber geometry, amount of overfire air, and jet direction have been investigated. Mixing characteristics in the combustion chamber are examined by adopting a newly defined mixing parameter, which has value of zero when gases are mixed completely and whose departure from zero indicates the degree of nonmixing. In representing the degree of mixing over the entire chamber, probability density function of this mixing parameter is more adequate. It is useful in comparative assessments of incinerator chambers and flow designs. Interpretation of flow field predictions in terms of residence time of combustion gases and velocity uniformity is also presented. It is suggested that understanding of local flow characteristics should be preceded in assessing the incinerator performance. © 1994 Combustion Institute
An Elctrom Gun using a Conical-Shaped Carbon Nanotube Field Emitter for a high-Brightness Mocrofocus X-ray tube
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