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  • Hopfield neural network  (1)
  • Lactation  (1)
  • Lipoblastomatosis  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Journal of intelligent manufacturing 3 (1992), S. 251-261 
    ISSN: 1572-8145
    Schlagwort(e): Assembly sequences ; constrained TSP ; Hopfield neural network
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The problem of finding an AND/OR precedence-constraint assembly schedule using optimization neural computation is presented. The precedence relationships of assembly operation result from the geometric constraints of subtasks. Because of the existence of geometric constraints among assembly subtasks, the assembly operation involves AND/OR precedence relationships; that is, the order of assembly crucially determines whether the desired task can be achieved. A feasible assembly schedule is a schedule that satisfies these AND/OR precedence constraints. It has been shown that all the feasible assembly schedules can be generated by transforming geometric constraints of subtasks to the pattern-matching operation. Using the question-answer pattern and pattern-matching operation, the assembly scheduling problem can be transformed into an AND/OR precedence-constrained traveling salesman problem (TSP). Two precedence-constrained TSPs, cost-constrained TSP (CCTSP) and state-constrained TSP (SCTSP), are discussed. The CCTSP artificially sets the cost of the prohibited moves to a very large value which ensures that the constraints are satisfied, while the SCTSP restricts the movement of next assembly subtasks. The advantage of the SCTSP over CCTSP in the generation of the assembly schedule will be illustrated. A novel method proposed here is to obtain the best AND/OR precedence-constraint assembly schedule using neural network computation. The geometric constraints of an assembled object are transformed into the elements of the connection matrix which specifies the connection strength among neurons. A modified Hopfield network is used to tackle the AND/OR precedence-constraints assembly scheduling problem. Multirobot assembly sequences generation is also discussed. The designed algorithm can accommodate various constraints and applications. Detailed algorithms, examples and experiments are presented.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Comparative clinical pathology 4 (1994), S. 25-29 
    ISSN: 1433-2981
    Schlagwort(e): Ferritin ; Haematology ; Horses ; Iron ; Lactation ; Pregnancy ; Postparturient
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Venous blood samples were collected from 16 Thoroughbred and Quarter Horse mares during late pregnancy (approximately one month before parturition), approximately 6 h after parturition, one month after parturition and 4 months after parturition when the foals were weaned. There were no significant differences over time for haematocrit, mean cell volume, mean cell haemoglobin concentration, platelet count or mean platelet volume. The icterus index was significantly higher, and the total plasma protein concentration was slightly lower, during late pregnancy than when nursing. Plasma fibrinogen concentration and total leucocyte counts were highest shortly after birth. Results from differential leucocyte counts revealed that the increased total leucocyte count measured shortly after birth was the result of increased numbers of neutrophils. There were no significant differences in absolute lymphocyte, monocyte or basophil counts, but the number of eosinophils was significantly lower shortly after birth. Total serum iron concentration and percentage saturation of transferrin with iron were highest shortly after birth. There was no significant difference in iron binding capacity over time. Serum ferritin and cortisol concentrations were lowest during late pregnancy, but the mean ferritin value was not significantly different from other time periods. The addition of iron and other mineral supplements to the basic concentrate fed at the University of Florida Horse Research Unit did not have a measurable effect on any haematological parameter evaluated in mares.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Pediatric surgery international 12 (1996), S. 71-72 
    ISSN: 1437-9813
    Schlagwort(e): Lipoblastomatosis ; Newborn
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A male newborn had a well-circumscribed, solid mass on the right anterior chest wall at birth. Computed tomography disclosed an infiltrating soft-tissue mass over the right 6th to 9th ribs near the costochondral junction. Surgical excision was done at the age of 5 days. Pathologic examination showed lipoblastomatosis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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