22,159 research outputs found
Automatic database acquisition software for ISDN PC cards and analogue boards
This paper describes an application for automatic speechdatabases
acquisition (ADA) developed by the authors in the
framework of the EC Telematics Project SpeechDat II. The
software is able to work with standard inexpensive PC cards for
ISDN lines, as well as Dialogic Boards for analogue telephone
lines. Both program versions share a common file format and
configuration. Other important characteristics of the recording
software are its simple set-up, a fast and flexible configuration of
the recording session, the real-time monitoring of calls and disk
space, and its proven robustness.Peer ReviewedPostprint (published version
Numerical analysis of a fin-tube plate heat exchanger with winglets
In this presented work, numerical analysis of heat transfer and flow characteristic using
longitudinal vortex generators (LVGS) in fin and flat tube heat exchanger has been
presented. Conjugate heat transfer 3D numerical model has been developed and
successfully carried out. Rectangular winglets were set in pairs, with downstream
orientation. The effects of impact angles of (20⁰ , 30⁰, and 40⁰ ) as well as tubes and
winglets were placed in one row lined arrangement and air flow by forward
arrangement and backward arrangement. Reynolds number is ranged from 500 to 5000.
The numerical results showed that in the range of the present study, the variation of
these parameters can result in the increase of heat transfer. The study focuses on the
Influence of the different parameters of VGs on heat transfer and fluid flow
characteristics of one row lined circular-tube banks. The characteristics of average Nu
number and skin friction coefficient are studied numerically by the aid of the
computational fluid dynamics (CFD) commercial code of FLUENT ANSYS 14. The
results showed increasing in the heat transfer and skin friction coefficient with the
increasing of Re number. It has been observed that the overall Nuav number of one
circular tubes increases by 23-31% ,by 23-43% and by 23-47% with angles of (20⁰,
30°, and 40⁰) respectively, in forward arrangement and the overall Nuav number of one
circular tubes increases by 23-42%, by 23-46% and 23-52%with angles of (20⁰, 30°,
and 40⁰) respectively, in backward arrangement, with increasing in the overall average
of skin friction coefficient. Also the results showed that the rectangular winglet pairs
(RWPs) can significantly improve the heat transfer performance of the fin and-tube
heat exchangers with a moderate pressure loss penalty
A general framework for positioning, evaluating and selecting the new generation of development tools.
This paper focuses on the evaluation and positioning of a new generation of development tools containing subtools (report generators, browsers, debuggers, GUI-builders, ...) and programming languages that are designed to work together and have a common graphical user interface and are therefore called environments. Several trends in IT have led to a pluriform range of developments tools that can be classified in numerous categories. Examples are: object-oriented tools, GUI-tools, upper- and lower CASE-tools, client/server tools and 4GL environments. This classification does not sufficiently cover the tools subject in this paper for the simple reason that only one criterion is used to distinguish them. Modern visual development environments often fit in several categories because to a certain extent, several criteria can be applied to evaluate them. In this study, we will offer a broad classification scheme with which tools can be positioned and which can be refined through further research.
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