Hall chart

The M and N circles can be superimposed on a Nyquist diagram (called a Hall chart) to directly obtain closed-loop frequency response information. 

BRINELL HARDNESS TEST. The standard method of measuring the hardness of metals. The smooth surface of the metal is dented by a steel hall under force. The standard load and time are 500 kg for 60 seconds for soft metals and 3000 kg for 30 seconds for steel and other hard metals. The size (diameter) of the resulting dent is measured, and the hardness determined from a chart or formula. 

The literature of industrial quality control is now very great. The standard work is W. A.. Shewhart s Economic Control of Quality of Manufactured Product (Macmillan r 1931). Short accounts are British Standard 600R Qualitj Control Charts, B. P. Dudding and W. J. Jennett, 1942 British Standard 1008 Quality Control A First Guide to Quality Control for F-ngineers, E. H. Sealy, H.M.S.O., 1946. A fuller account is L. E. Simon s An Engineer s Manual of Statistical Methods (Chapman Hall, 1941). 

Figure 5.4-2 Generalized compressibility chart, low pressures. (From D. iM. Himmelblau. Basic Principles and Calculations in Chemical Engineering, 3rd Edition, copyright 1974, p. 175. Reprinted by permission of Prentice Hall, Inc., Englewood Qiffs, NX)...

Fig. 2 Out-of-control pattern recognition. (A) Change or jump in level (B) Trend or steady change in level (C) Two populations (D) Recurring cycles. (Chart courtesy of Prentice Hall, Inc., Upper Saddle River, NJ.)...

When I was shown the charts and diagrams, to add, divide, and measure them "). The slow, heavy pace of the lines, coupled with the four repetitions of the introductory "when" phrases, emphasizes the narrator s view of the lecture as long, drawn out, and repetitious. Even though the rest of the audience seems to appreciate the astronomer, giving him "much applause" (I. 4), the narrator becomes restless, "tired and sick" (I. 5), and leaves the lecture hall. 

Fig. 12. Identification chart for SiC whisker growth conditions. After Milewski et al. [79]. Reproduced with permission of Chapman Hall, London.

Besterfield D, Control Charts for Variables, Quality Control, Prentice-Hall, 1997. 

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