منابع مشابه
New orthogonal designs from weighing matrices
In this paper we show the existence of new orthogonal designs, based on a number of new weighing matrices of order 2n and weights 2n − 5 and 2n−9 constructed from two circulants. These new weighing matrices were constructed recently by establishing various patterns on the locations of the zeros in a potential solution, in conjunction with the power spectral density criterion. We also demonstrat...
متن کاملSome New Results on Circulant Weighing Matrices
We obtain a few structural theorems for circulant weighing matrices whose weight is the square of a prime number. Our results provide new schemes to search for these objects. We also establish the existence status of several previously open cases of circulant weighing matrices. More specifically we show their nonexistence for the parameter pairs (n, k) (here n is the order of the matrix and k i...
متن کاملDynamic Weighing Calibration Method for Liquid Flowmeters -a New Approach
In the last years, the PTB liquid flow group has been working on the development of a new method to calibrate liquid flowmeters under dynamics conditions [1,2]. Such a measurement principle is based on a dynamic weighing approach, which is able to reproduce the unit of mass flow several times, with the ultimate goal to reduce the calibration time, energy cost, and workload in liquid flow calibr...
متن کاملWeighing wet diapers: a new approach to measuring infant output.
Accurate measurement of fluid losses is important in infant patients, especially in burn cases. Indwelling catheters, urine collection bags and other commonly used methods of continuous urine collection and measurement have several disadvantages including trauma, danger of infection, skin irritation, need for restraints, and use of expensive devices. The present study was designed to ascertain ...
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Ubiquitous computing technologies which are cheap and easy to use are more likely to be adopted by users beyond the ubiquitous computing community. We present an ultrasonic-only tracking system that is cheap to build, self-calibrating and self-orientating, and has a convenient form factor. The system tracks low-power tags in three dimensions. The tags are smaller than AAA batteries and last up ...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 1897
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja02077a002