Shark-tooth shape

Figure 16.14 gives relay-feedback test results for both loops used in this structure. Although the amplitude and period look reasonable for the Foa/Ti6 pairing, the shark-tooth shape of the tray 26 temperature response is characteristic of a process with an inverse response. This is confirmed by the controller gain and reset time values calculated from test data. As given in Table 16.3, the values for the Fqa/T 6 loop have reasonable values. However, the controller for tray 26 has an unrealistic reset time of 8600 min. 

Fig. 7. Cross section of a small manganese nodule with a shark tooth as one of the nuclei (V shape).

The two interacting temperature loops are tuned using conventional sequential tuning. The faster of the two loops (Stage 35-to-reboiler duty) is tuned first with the other loop on manual. Then the Stage 10-to-R/F loop is tuned with the first loop on automatic. Relay-feedback tests of this loop show the shark s tooth shape associated... 

Visual Marshmallow shape, matte surface, ants, overflow chocolate, brown colour Internal surface, snap-fit lid Orange shape, matte surfaee, tissue paper chamber, compartments, transparent side of compartment, snap-fit lid Chocolate shape, matte surface, stickman-shaped tissue paper container, temporary waste storage, snap-fit lid Shark shape, glossy surface, transparent eyes, inbuilt cutter, screw lock lid Tooth shape, glossy surface, toothpasteshaped tissue paper container, snap-fit lid Pillow-shaped container, biscuitshaped lid, matte icy surface, translucent container, snap-fit lid... 

Apart from sharks, where the upper and lower teeth are relatively similar in shape and number, the upper and lower jaws of modern jawed vertebrates (gnathostomes) generally differ in the shape and number of their teeth or tooth-bearing dermal bones. In bony fishes (osteichthyans), and land vertebrates (tetrapods), this difference disappears as one considers early, Paleozoic groups, whose upper jaw bones are almost a mirror image of those of the lower jaw. This curious symmetry has been pointed out long ago by the American paleontologist A.S. Romer in early... 

Figure 14.6 (a) Tooth files in the blue shark (Prionace glauca), where shape differences occur... 

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