| 1. |
Electronics and Communications Section: Chairman's address. Channelling—a sketch |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 15-18
T.B.D.Terroni,
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DOI:10.1049/pi-b-2.1961.0002
出版商:IEE
年代:1961
数据来源: IET
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| 2. |
Mersey and North Wales Centre: Chairman's address. The effects of electricity on human beings |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 19-20
Donald A.Picken,
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DOI:10.1049/pi-b-2.1961.0003
出版商:IEE
年代:1961
数据来源: IET
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| 3. |
Southern Centre: Chairman's address. The telecommunication engineer and the background in which he works |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 21-23
R.Goford,
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DOI:10.1049/pi-b-2.1961.0004
出版商:IEE
年代:1961
数据来源: IET
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| 4. |
Rugby Sub-Centre: Chairman's address. The new look in industrial electronics |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 23-24
E.S.Hall,
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DOI:10.1049/pi-b-2.1961.0005
出版商:IEE
年代:1961
数据来源: IET
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| 5. |
North-Western Utilization Group: Chairman's address. Some effects of automation |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 24-25
C.Ayers,
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DOI:10.1049/pi-b-2.1961.0006
出版商:IEE
年代:1961
数据来源: IET
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| 6. |
A note on the formula for loss in a ferrite |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 25-26
L.Lewin,
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DOI:10.1049/pi-b-2.1961.0007
出版商:IEE
年代:1961
数据来源: IET
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| 7. |
The phase control of rotors at high spinning speeds |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 26-32
P.A.Egelstaff,
H.J.Hay,
G.Holt,
J.F.Raffle,
J.R.Pickles,
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摘要:
A complex motor (called the spinning head) is described which can drive 20lb rotors at speeds up to 60 000 r.p.m. and at the same time allow the phase relative to another unit or a standard to be controlled. The system has a natural phase stability of 0.5°, and with a simple servo system, phase control to 0.1° is possible.The unit was developed for neutron spectrometer work and its value in this field is discussed. A number of spinning heads are in use in several neutron spectrometers and have been shown to be very reliable in operation.
DOI:10.1049/pi-b-2.1961.0008
出版商:IEE
年代:1961
数据来源: IET
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| 8. |
An electrical analogue for heat waves in an exothermic medium |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 33-36
R.T.Ackroyd,
J.Houstoun,
J.W.Lynn,
E.Mann,
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摘要:
The paper describes the design, construction and operation of an electrical analogue used for simulating the conditions of propagation of heat waves in an exothermic medium.The equipment is in two parts. The first is a passiveRCnetwork which is the usual form of analogue for heat conduction problems. The second consists of a function generator which calculates the stored energy released as the wave travels across the medium, together with the necessary switching apparatus. The function generator is switched rapidly along the path of the wave. Its output for any point is a function of the temperature at that point. As the wave reaches a given point, additional energy is released into the network. This modifies the conditions at each point to satisfy equations of the form-δ2ψ+ρdψ/dt=f(ψ)The paper also describes the construction and operation of electronic switches capable of scanning the network and adjusting the conditions in times of the order of 5 millisec per node.
DOI:10.1049/pi-b-2.1961.0009
出版商:IEE
年代:1961
数据来源: IET
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| 9. |
The concept of equivalent source e.m.f. and equivalent available power in signal-generator calibration |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 37-42
D.Woods,
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摘要:
The source impedance of a signal generator, for use under terminated conditions, has a direct effect on the accuracy of the load voltage. Signal-generator specifications rarely give detailed information about the variation of this parameter with frequency. Consequently, the user is generally forced to assume that it is constant and equal to the nominal value. The view is maintained that it is impracticable to apply corrections for this parameter even if its value is known.Three methods are analysed for calibrating the output level of signal generators with a view to determining that method which minimizes the error in the load voltage due to source impedance variation. The methods are each compared in terms of the voltage ratio produced across an arbitrary load impedance by an imperfect generator to a perfect generator. The voltage ratios are expressed in terms of the reflection coefficients of the generator and load impedances. The minimum and maximum of the ratios are given in terms of voltage standing-wave ratios. The results are equally applicable to coaxial and waveguide systems.The recommended method employs the concept of equivalent source e.m.f. or equivalent available power. The requirements for a suitable instrument to measure these quantities are briefly discussed.Recommendations are made regarding the manner of specifying the tolerances on signal-generator parameters which affect the accuracy of the load voltage, namely the calibration level, the attenuation and the source impedance.
DOI:10.1049/pi-b-2.1961.0010
出版商:IEE
年代:1961
数据来源: IET
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| 10. |
An electronic analogue computer for a coal transportation problem |
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Proceedings of the IEE - Part B: Electronic and Communication Engineering,
Volume 108,
Issue 37,
1961,
Page 43-47
E.G.Anderson,
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摘要:
The transportation problem and linear programming are defined and an electronic analogue of the problem and its optimum solution is described.A computer with a 5×20 matrix has been built using current and opposing e.m.f. to simulate coal flow and route costs respectively. The circuits are described and a Section on operating technique is included.A typical problem and its solution are given, and it is concluded that a larger computer is feasible.
DOI:10.1049/pi-b-2.1961.0011
出版商:IEE
年代:1961
数据来源: IET
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