Grid sampling

In the systematic approach, the contaminated signal was processed using transients with parameters selected from a uniformly sampled grid in the parameter space. For each parameter value, the quality of the processed signal was computed. An example result is presented in Figure 2 which shows the performance as a function of the two parameters and / p. The parameter values /, and which yielded the lowest entropy were selected for processing. 

Example of a systematic sampling plan for collecting samples from a lake. Each solid dot represents a sample collected from within the sampling grid. 

AOTF w/c RMs bearing the silver, silver iodide and silver sulfide nanoparticles were depressurized slowly and the nanoparticles in the cell were collected and re-dispersed in ethanol. Finally, the sample grids for the TEM (FEl TECNAl G ) measurements were prepared by placing a drop of ethanolic dispersion of nanoparticles on the copper grid. The morphology and size distribution of the silver, silver iodide, and silver sulfide nanoparticles were determined by TEM at an operation voltage of 200kV. The crystallinity of the silver, silver iodide, and silver sulfide nanoparticles was studied by electron diffraction techniques. 

A second major source of computational difficulties associated with uniform prior-prejudice distributions is connected with the extremely fine sampling grids that are needed to avoid aliasing effects in the numerical Fourier synthesis of the modulating factor in (8). To predict the dependence of aliasing effects upon the prior prejudice, we need to examine more closely the way the MaxEnt distribution of scatterers is actually synthesised from the values of the Lagrange multipliers X. 

To assess the extent to which the exponentiated Fourier series has appreciable Fourier amplitudes, and set the sampling grid accordingly, further development of formula (21) is needed. We first rewrite... 

Fig. 2. Au concentration in rock chip samples and location of four soil sampling grids. (CVR = Coromandel Volcanic Region TVZ = Taupo Volcanic Zone).

Several conditions must be met for successful ETEM investigations. Thin, electron-transparent samples are necessary—this requirement can usually be met with most catalyst powders. Ultrahigh-purity heater materials and sample grids capable of withstanding elevated temperature and gases are required (such as those made of stainless steel or molybdenum). The complex nature of catalysis with gas environments and elevated temperatures requires a stable design of the ETEM instrument to simulate realistic conditions at atomic resolution. 

Figure 1. Sampling grid (6X6 m) and location of individual cores within each grid square. (Large core, L medium core, M small core, S.) Reproduced with permission from Ref. 26, Copyright 1971, American Chemical Society.

The basic approach with the axoneme-based analysis is to combine tubulin and axonema fractions and then to quench the reaction with glutaraldehyde. Samples of sufficient axoneme concentration are then added directly onto Formvar-coated sample grids for staining and electron microscopy. In some cases where the axoneme count is too low, samples may be sedimented onto grids by the method of Gould and Borisy (1977). With the methodology perfected by Borisy and Bergen (1982) samples can be taken as frequently as every 20 seconds, and the... 

Bendigo is a classic example of a low-sulphide gold-quartz deposit located in a folded sequence of sandstone and shale of the Cambrian-Ordovician age (Ramsay et al. 1998 Goldberg et al. 2007). Regional soil geochemistry covers an area of 4,000 km. Sampling Grid 5x5 km. 134 samples were collected as can be seen in Fig. 2, titanium anomalies form sub-... 

Figure 3. Plan view map of the site core ofPalmarejo, showing the location of the sample grids for the plaza and the patio. Modem vegetation prevented sample collection from certain spaces, represented as "empty" areas in the...

In the course of systematic soil sampling, we use grid patterns for identifying the sampling points. The size of the sampling grid and the locations of sampling points... 

We use sampling grids mainly for surface soil sampling, however, it is not unusual to place soil borings and collect subsurface samples on a grid pattern. Grids are also used for soil sampling from the bottom and sidewalls of excavation pits and trenches. 

We need the following field equipment for laying out a sampling grid ... 

The steps for laying out a composite sampling grid for a single point source of PCB contamination are as follows ... 

Building a sampling grid without the help from a land surveyor requires an effort of two to three persons. 

Make a copy of the sampling grid map from the SAP and use it in the field for recording of actual measurements and sampling points. 

Photograph the site to show the sampling grids and permanent landmarks. 

To overlay a sampling grid over an excavation pit, we follow these steps ... 

If a pit is not safe for entry, delineate on the ground level the outer boundaries of the sampling grid with stakes and string. The dimensions of the outer boundaries should always be larger than the pit dimensions as shown in Figure 3.9. 

Mentally project the sampling grid to extend it from the grid boundaries onto the pit. Direct the excavator operator to retrieve a bucket of soil from each imaginary sampling point. 

The selection of the sampling grid depends to a large extent on the expected character of the anomaly and the scale of the study. 

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