摘要 :
The best way to find out about some of the difficulties in making measurements is to make measurements. Much of this book will be devoted to making measurements - to trying to find out something about the sources of errors in meas...
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The best way to find out about some of the difficulties in making measurements is to make measurements. Much of this book will be devoted to making measurements - to trying to find out something about the sources of errors in measurements and how they may be detected and minimized. The second chapter goes a little more into detail about the importance of making good measurements and tells us something about the role of measurements in our everyday life and in business and commerce. In the third chapter we undertake a measurement that involves no more equipment than a book and a millimeter scale. Everyone who reads this book should try making several repetitions of the measurement described there. We will examine 96 similar measurements made by a class of girls. Such a large collection of measurements poses the problem of finding some convenient and precise method of describing the collection. Perhaps we can find some number to represent the whole collection and some other number that will represent the errors in the measurements.
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摘要 :
This book is an elementary introduction to the laws of measurements. But the approach is not an abstract discussion of measurements, instead it depends upon getting you to make measurements and, by observing collections of measure...
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This book is an elementary introduction to the laws of measurements. But the approach is not an abstract discussion of measurements, instead it depends upon getting you to make measurements and, by observing collections of measurements, to discover for yourself some of the properties of measurements. The idea is to learn something about measurement that will be useful-no matter what is being measured. Some hint is given of the devices that scientists and measurements specialists use to get more out of the available equipment. Understanding something about the laws of measurements, a person may be able to get the answers to your own research problems with half the usual amount of work. No young scientist can afford to pass up a topic that may double his scientific achievements.
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摘要 :
The National Institute of Standards and Technology (NIST) Calibration ServicesUsers Guide provides detailed descriptions of NIST calibration services, measurement assurance programs, and special-test services currently available. ...
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The National Institute of Standards and Technology (NIST) Calibration ServicesUsers Guide provides detailed descriptions of NIST calibration services, measurement assurance programs, and special-test services currently available. The following measurement areas are covered: (1) dimensional: (2) mechanical, including flow, acoustic, and ultrasonic; (3) thermodynamic; (4) optical radiation; (5) ionizing radiation; (6) electromagnetic, including dc, ac, rf, and microwave; and (7) time and frequency.
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摘要 :
This thesis reports on a simultaneous measurement of the 4He(e,e'p), 4He(e,e'pp), and 4He(e,e'pn) reactions at Q2 = 2 (GeV/c)^2 and xB > 1 for an (e,e'p) missing momentum range of 400 to 830 MeV/c.
摘要 :
The report includes the design,construction,and testing of a Dual Mixer Time Difference (DMTD) system. The precision of time difference measurement with this system was shown to be about 0.1picosecond and the accuracy about 10ps;s...
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The report includes the design,construction,and testing of a Dual Mixer Time Difference (DMTD) system. The precision of time difference measurement with this system was shown to be about 0.1picosecond and the accuracy about 10ps;similarly,the frequency stability precision was shown to be described by (signa sub y)(tau) approximately equal to 10to the minus 13th power/tan, 0.1s 收起
