17
bridges
1
**Author**:
**Source**: Unknown -
**Please cite**:
1. Title: Pittsburgh bridges
2. Sources:
-- Yoram Reich & Steven J. Fenves
Department of Civil Engineering
and
Engineering Design Research Center
Carnegie Mellon University
Pittsburgh, PA 15213
Compiled from various sources.
-- Donor: Yoram Reich (yoram.reich@cs.cmu.edu)
-- Date: 1 August 1990
3. Past Usage:
-- Reich & Fenves (1989). Incremental Learning for Capturing Design
Expertise. Technical Report: EDRC 12-34-89, Engineering Design
Research Center, Carnegie Mellon University, Pittsburgh, PA.
-- Qualitative results and runs with original ordering of examples.
using COBWEB.
-- Reich (1989). Converging to ``Ideal'' Design Knowledge by Learning,
Proceedings of the First International Workshop on Formal Methods in
Engineering Design, pp: 330-349, Colorado Springs, CO, January 1990.
-- Describes a new design method with Bridger (variant of COBWEB) using
this domain. (Also an EDRC report: 12-35-89)
-- Reich (1989) Combining Nominal and Continuous Properties in an
Incremental Learning System for Design. Technical Report: EDRC 12-33-89.
-- Comparison of performance of Bridger when running on both versions
(V1 and V2) of the database
-- Reich (1989) Incremental Concept Formation with Mixed Property Types
Unpublished Manuscript.
-- Results using 10 random 10-fold cross-validation test with Bridger
(relative error rate):
Version V1 of the database:
MATERIAL 18.4%, REL-L 38.7%, SPAN 42.7%, T-OR-D 14.7%, TYPE 47.6%.
Version V2 of the database:
MATERIAL 24.2%, REL-L 41.7%, SPAN 39.9%, T-OR-D 14.7%, TYPE 56.5%.
-- Quinlan (1989) Personal communication.
-- Results of a 10-fold cross-validation test with C4.5, and with
a separate decision tree for each design property obtained the
following error rates on version V1 of the database:
MATERIAL 15%, REL-L 32%, SPAN 32%, T-OR-D 15%, TYPE 44%.
4. Number of instances: 108
5. Relevant Information:
There are two versions to the database:
V1 contains the original examples and
V2 contains descriptions after discretizing numeric properties.
There are no ``classes'' in the domain. Rather this is a DESIGN domain where
5 properties (design description) need to be predicted based on 7
specification properties.
6. Number of Attributes: 13: 7 specifications, 5 design description, and 1
identifier (not used for the classification)
7. Attribute Information:
The type field state whether a property is continuous/integer (c)
or nominal (n).
For properties with c,n type, the range of continuous numbers is given
first and the possible values of the nominal follow the semi-colon.
name type possible values comments
------------------------------------------------------------------------
1. IDENTIF - - identifier of the examples
2. RIVER n A, M, O
3. LOCATION n 1 to 52
4. ERECTED c,n 1818-1986 ; CRAFTS, EMERGING, MATURE, MODERN
5. PURPOSE n WALK, AQUEDUCT, RR, HIGHWAY
6. LENGTH c,n 804-4558 ; SHORT, MEDIUM, LONG
7. LANES c,n 1, 2, 4, 6 ; 1, 2, 4, 6
8. CLEAR-G n N, G
9. T-OR-D n THROUGH, DECK
10. MATERIAL n WOOD, IRON, STEEL
11. SPAN n SHORT, MEDUIM, LONG
12. REL-L n S, S-F, F
13. TYPE n WOOD, SUSPEN, SIMPLE-T, ARCH, CANTILEV, CONT-T
8. More complicated attributes:
One can use a hierarchical structure for the Type property. There are two
options.
option 1 (use examples without modification)
--------
Type
/ /
/ /
wood suspen arch truss
/ |
/ |
cantilev cont-t simple
option 2 (requires changes in the Type property - specified bellow)
--------
Type
/ / |
/ / |
wood suspen arch truss
/ / |
/ / |
tied-a not-tied cantilev cont-t simple arch-t
Change the Type property of the following examples (in both V1 and V2):
E28 -> arch-t
E91,E90,E84,E83,E73 -> tied-a
E97,E78,E77,E75,E66,E64,E43 -> not-tied
9. Missing Attribute Values:
Attribute #: # instances with missing values:
2 1
6 27
7 16
8 2
9 6
10 2
11 16
12 5
13 3
Information about the dataset
CLASSTYPE: nominal
CLASSINDEX: no
1
ARFF
2014-04-06T23:20:33
Public https://api.openml.org/data/v1/download/17/bridges.arff
https://openml1.win.tue.nl/datasets/0000/0017/dataset_17.pq 17 TYPE IDENTIF 1 tmpuci public https://openml1.win.tue.nl/datasets/0000/0017/dataset_17.pq deactivated
2020-11-20 19:29:21 3dafcb12b5acaf00e810c6dbaec8b241