Data file size

Another data acquisition consideration is data file size. A high speed LC/MS data file can easily reach dimensions of 20 MB/min if maximal information is required and the detectors are set to broadest scan ranges and highest sampling rates without data reduction. LC/MS systems capable... 

Average Data File Size based on Detector Technology... 

Detector 1 Samplinq Rate Run Time Data File Size... 

FIGURE 9 The impact of detector technology on data file size. 

Analyte detection in all these methods involved an ultraviolet diode array detector over the range 214-216 nm to minimize data file size. Mass spectrometric data were obtained following a split of the HPLC solvent stream of approximately 100 1. The mass spectrometer was tuned for optimal sensitivity and unit mass resolution. The mass range 180-800 daltons... 

The image processing software requires that the computer on which the data are viewed has more than twice as much RAM as the data file size. It may be necessary to decrease the image resolution or image smaller areas to work within this limit. 

The content uniformity results for compounds A and B are shown in Fig. 4.40 the three data sets from the beginning, middle, and end of the manufacturing run were individually ordered by size and plotted. The results are as follows (use program MULTI and data file CU Assayl.dat see Tables 4.37 and 4.38) ... 

Figure 5.4. The presentation of the values contained in a data file. A program and file names B size of file C instructions on how to proceed D currently active rounding option E. abscissa vector F ordinate vector.

The raw data table is displayed with the numbers on a white background and the headers and index on a gray one a yellow How-to-Procede panel gives instructions, respectively confirms choices two white panels display the file size and the presently selected rounding option. 

File) (New) A new data file can be generated by defining the number of columns and rows and then filling the table either in a column-by-col-umn or a row-by-row sequence if the option (Leave Empty) is chosen, the file is stored as is. The array size is limited to m < 10, but also by the available memory. 

Instructions) and (Import Data from Excel) allow a portion of an Excel spreadsheet to be copied into a SMAC-data file the necessary steps are as follows (1) open the Excel file, mark the range to be copied and press [Copy] (2) open DATA and create a new or open an existing data file (3) select (Input Data) (Import Data from Excel) and position the cursor on an appropriate cell, e.g. cell (1,1). The imported data replaces any data that was in that cell range. If the imported cell range needs more columns or rows than are presently available, the data array is correspondingly increased in size. Headers and dimensions can be added later. 

After you have collected the first scattering patterns check that the data files have arrived in the expected directories. Check the size of the files. Open the ASCII files or the ASCII headers in a text editor and check that the environmental data have arrived in the files. Vary environmental parameters in test measurements and check that the values in the ASCII files vary accordingly. If possible, calibrate environmental parameters (e.g., sample temperature, straining force, cross-bar position). Ask the beamline staff to demonstrate what they tell you. Double check Otherwise your effort may be wasted. 

Although we have made use of SD files up to this point, at this stage we switch to SMILES files (19). This becomes necessary because even for small libraries the file size for a fully enumerated set can be quite large. For example, a sample library of just 2500 compounds resulted in 4.85 MB SD file while the SMILES file was only 384 KB. The one caveat with the SMILES format is that there is no standard for handling data fields. Our solution was to reformat the SD file type data field tags into the SMILES file,... 

Since this simulation will run for a long time and we have specified a small Maximum Step Size, a lot of data will be collected. PSpice normally collects voltage data at every node and current data through every circuit component This results in a large Probe data file that can take a long time to load and may cause memory problems. Since we are interested only in the input and output voltages, we will tell PSpice to collect data only at the input and output nodes, which will be marked with markers. 

Since we are running 1000 simulations and the circuit is fairly large, the data file created by PSpice could be huge if we collect voltage and current data for all circuit elements. To reduce the size of the data file we will collect data only for the output voltage. This can be done by placing a marker at the output. To place a marker, select PSpice, Markers, and then Voltage Level from the Capture menus. Place the marker at the output as shown ... 

Data type (analog and/or digital output/input) and capacity (size of the data files). 

X-Ray powder diffraction patterns are catalogued in the JCPDS data file,7 and can be used to identify crystalline solids, either as pure phases or as mixtures. Again, both the positions and the relative intensities of the features are important in interpretation of powder diffraction patterns, although it should be borne in mind that diffraction peak heights in the readout from the photon counter are somewhat dependent on particle size. For example, a solid deposit accumulating in a heat exchanger can be quickly identified from its X-ray powder diffraction pattern, and its source or mechanism of formation may be deduced—for instance, is it a corrosion product (if so, what is it, and where does it come from) or a contaminant introduced with the feedwater ... 

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