Using the prior knowledge of phase object,this present paper studies the 3 D phase object reconstruction accuracy and the effect of algorithem,basis function, sampling mode, viewing range and data noise by applying the beam deflection iterative tomography.
In this paper,the relation between phase error and sampling mode is studied by means of a large amount of study on spectrum analysis of steam turbine vibration signal.
The many factors caused data differences of automatic and manual observation were described, including difference of measuring principles and observation method, differences of measuring time and space, difference of sampling mode and algorithm, difference of time level, and so on.
It analyses the principle and methods of waveform reconstruction of the data acquisition module under double A/D parallel time-interleaved real-time sampling mode and random sampling mode. It also illustrates the flow of the monitoring software and the application of FPGA technology in this design.
Silver nitrate colorimetic method and methylene blue spectrophotometry were compared in aspects of accuracy,precision,sensitivity,sample mode,analyzing method,detection limit,disturbance,toxicity of reagents,and so on. Result indicated that the latter was more suitable for measurement of sulfureted hydrogen in the work places of Petrochemical Enterprises.
Through comparative study of the three traditional sampling methods using Matlab for analysis of its ability to suppress harmonics, resulting in better;
The sampling methods and calculation methods required in European and EPA regulations are analyzed. The hardware and software of the test system are designed.
After researching on how to improve resolution in regular sampling methods, this article makes researches on irregular sampling modes, such as supermode sampling, hipemode sampling and microscanning.
Then a discussion on the possibility of retaining (periodic) system controllability during discretization is made, resulting in the conclusion that the controllability of (linear) periodic systems does not loss during discretization using the nonequidistant sampling pattern.
The applicability of the peristaltic pump for beam generation enables an optimum sampling mode for a variety of analytical tasks (continuous sample uptake, manual or automated, or different flow-injection modes).
A metering pump, used to measure the flow rate Q, is supplied with melt either from an extruder (online mode) or from a pressurized sample cylinder (sample mode).
These error data, like those of humans, are a result of spontaneous responding rather than specific training and do not solely depend upon the sample mode (e.g.
Instantaneous scanning and focal animal sampling methods were used to record the behaviors of nine wild Great Bustards (Otis tarda) and their time budget from November 2004 to January 2005.
The blind receiver for OFDM systems can be derived via Sequential Monte Carlo (SMC) in factor graphs, the previous SMC blind receiver can be regarded as the special case of the sum-product algorithms using sampling methods.
Both studies used a comparable methodology which included the same inclusion and diagnostics criteria, representative sampling methods and similar diagnostic structured interviews.
The comparison of the sampling methods during the first run revealed that the urea nitrogen rate was significantly higher, but the ammonia nitrogen rate significantly lower in the WBW.
By comparative studies of sampling methods it was shown that specimens should be obtained preferably by aspiration in order to avoid contamination by anaerobic flora.
The effect of the density of the sampling pattern and of the local randomness on the shape of the uniformity function is studied with simulated water application depths.
If we understand the structure of the space formed by the light rays passing through a volume of space, we can determine the camera, or in other words the sampling pattern of light rays, that is optimal with regard to a given task.
采样方式
sampling mode
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