An Element of the Array

Logic synthesis of otie dimensional and multi-dimensional arrays in VHDL or Verilog results in x times y xQgvsX vs for an array with x and y dimensions. Further, to write to an element of the array requires decoding logic and to read an element from the array... 

The array detector (collector) consists of a number of ion-collection elements arranged in a line each element of the array is an electron multiplier. Another type of array detector, the time-to-digital converter, is discussed in Chapter 31. 

An ion beam containing just two types of ion of m/z values 100 and 101 dispersed in space on passing through a magnetic field. After dispersal, ions of individual m/z value 100 or lOI are focused at points close to the entries of two elements of an array collector. Each element of the array is a point ion collector. 

There is potential confusion in the use of the word array in mass spectrometry. Historically, array has been used to describe an assemblage of small single-point ion detectors (elements), each of which acts as a separate ion current generator. Thus, arrival of ions in one of the array elements generates an ion current specifically from that element. An ion of any given m/z value is collected by one of the elements of the array. An ion of different m/z value is collected by another element. Ions of different m/z value are dispersed in space over the face of the array, and the ions are detected by m/z value at different elements (Figure 30.4). 

An assemblage (array) of single-point electron multipliers in a microchannel plate is designed to detect all ions of any single m/z value as they arrive separated in time. Thus, it is not necessary for each element of the array to be monitored individually for the arrival of ions. Instead, all of... 

Capital italic letters in bold-face are used by typesetters to represent matrices. The values in an array, or the elements of the array, are denoted using the corresponding small italic letters with appropriate subscripts. Thus, a,y denotes the element in the ith row and yth column of the matrix A. The individual elements of the previously defined A matrix are... 

Color raster devices A raster device can map an array stored in memory on to the screen so that the value of each element of the array controls the appearance of the corresponding point on the screen. It is possible to draw... 

To apply Equation (1.14), recorded data are arranged into arrays either from the highest to the lowest or from the lowest to the highest. The number of values above a given element and including the element is counted and the probability equation applied to each individual element of the array. Because the number of values above and at a particular element is a sum, this application of the equation is, in effect, an application of the probability of the union of events. The probability is called cumulative, or union probability. After all union probabilities are calculated, an array of probability distribution results. This method is therefore called probability distribution analysis. This method will be illustrated in the next example. 

In the empirical term analysis of a spectrum, the lines are organized into an array in which the rows are characterized by the term values of odd parity and the columns by the term values of even parity (or vice versa). Each element of the array is defined by the difference between an odd and an even term and thus represents the wavenumber of a transition. The problem is given the observed wavenumbers, find the term values. For spectra of only moderate complexity this was done by looking for constant differences—i.e., pairs of lines for which the difference in wavenumber is constant within experimental error. If a given difference is repeated a number of times, it cannot be attributed to chance but must represent a term difference—i.e., the pairs of transitions all end on the same pair of terms. In very complex spectra containing thousands of lines there are millions of possible differences forming a practically... 

Figure 4. Relationship of the (RuFs)4 geometry to an element of the RuFs inflnite hexagonal nearly-close-packed F atom array.

Any of the four worksheet formulas described below can be used to select every Nth data point from a data table. All four utilize the INDEX(array, row num,column num) function to select an element from the array of data, but they use different methods to calculate the pointers row num and column num into the reference that contains the data. 

VBA considers a one-dimensional array to have the elements of the array in a row. This can cause problems when you select a range of cells in a column and assign an array to it, as in the Sub procedure shown in Figure 15-6. 

Many of Excel s worksheet functions can accept an indefinite number of arguments. The SUM function is an example of such a function its syntax is =SUM(number1, number2,...). To create a custom function with an indefinite number of arguments, use the ParamArray keyword. An argument declared with ParamArray is an array of Variants, and each element of the array can itself be an array. 

An Experiment can be related to one or more other Experiments through the recursive association relates. A ControlElement in this model is used to capture the situation when there is an Element on the Array that for a particular Hybridization is expected to yield some specific expression value (of type Expres-sionValueType). 

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