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OPERATIONAL METHODS OF DEALING WITH CIRCUITS EXCITED BY SINUSOIDAL IMPULSES |
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Canadian Journal of Research,
Volume 20a,
Issue 4,
1942,
Page 33-38
W. B. Coulthard,
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摘要:
A method is developed of deducing operational expressions for complex wave forms such as repeated sinusoidal impulses. By the use of the Heaviside expansion theorem, formulae are obtained for the current flowing in a circuit consisting of a condenser and a loading resistance when fed from a straight line rectifier.
ISSN:1923-4287
DOI:10.1139/cjr42a-005
出版商:NRC Research Press
年代:1942
数据来源: NRC
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2. |
THE INFLUENCE OF SAMPLE COMPOSITION ON MAGNESIUM, CADMIUM, AND LEAD INTENSITY RATIOS AS RADIATED FROM A SPARK SOURCE |
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Canadian Journal of Research,
Volume 20a,
Issue 4,
1942,
Page 39-47
G. O. Langstroth,
K. B. Newbound,
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PDF (507KB)
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摘要:
Marked variations have been observed in the relative intensities of magnesium, cadmium, and lead lines on the addition of various amounts of foreign substances to standard samples and excitation in a condensed spark source. The changes in the interspectra intensity ratios depended on the nature and amount of the added substances, as well as on the elements under consideration. In many instances buffering of the samples with sodium potassium tartrate or potassium nitrate did not reduce the variations. The behaviour cannot be explained solely on the basis of changes in an "effective" discharge temperature. The data permit no obvious generalization that might be helpful as a criterion for the choice of internal standard elements and buffer substances.
ISSN:1923-4287
DOI:10.1139/cjr42a-006
出版商:NRC Research Press
年代:1942
数据来源: NRC
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