Associative arrays

In practice, a particular phase cycle is defined by means of an array of RF pulse settings (to be used cyclically during consecutive scans) and an associated array of receiver phases . The receiver phase , however, does not correspond to any hardware device setting. Rather, it is an interlocution for the various modes of how each single-scan signal should be handled by the data accumulation procedure (add, subtract, quad add, quad subtract, etc.). 

List Processing (LISP) is a programming language that uses an interpreter for symbolic calculations based on single-scalar values (atoms) and associative arrays (lists). 

The minimum critical mass calculations involved arrays of plates, cubes, or square cross-section rods in water. A minimum critical array mass is found by changing the spacing of elements, d, in a particular array until a maximum value of keff is found when keff is plotted versus d. A second element size is then selected for the array and the maximum keff and the associated array element spacing found. The mass and spacing of the minimum critical mass (keff = 1.0) array are obtained by linear interpolation between the masses and spacings at the maximum keff values. 

The Lua language is ideally suited to implement sparse matrix techniques. A table in Lua is an associative array that is efficiently implemented in flie native language in terms of both storage allocation and access speed. A table array can be defined in the language and only the non-zero elements simply be defined. The... 

The fundamental data strueture in Lua is the table and in faet this is the only data structure in Lua. While this is somewhat diseoneerting to some new user of Lua it is one of the most useful features of Lua. The type table implements associative arrays whieh means that tables ean be indexed not only with numbers but with any other value (exeept nil). Tables in Lua may be used to implement ordinary arrays, symbol tables, sets, reeords, graphs, trees, veetors, matriees, ete. In Lua tables are simply objeets and the name of a table does not store the table - it simply contains a reference or pointer to the table. Tables can thus be readily passed to functions with a minimum of expense in computing resources. 

As pointed out earlier (Section 3.5), certain shapes of hysteresis loops are associated with specific pore structures. Thus, type HI loops are often obtained with agglomerates or compacts of spheroidal particles of fairly uniform size and array. Some corpuscular systems (e.g. certain silica gels) tend to give H2 loops, but in these cases the distribution of pore size and shape is not well defined. Types H3 and H4 have been obtained with adsorbents having slit-shaped pores or plate-like particles (in the case of H3). The Type I isotherm character associated with H4 is, of course, indicative of microporosity. 

The major advantage of array detectors over point ion detectors lies in their ability to measure a range of m/z values and the corresponding ion abundances all at one time, rather than sequentially. For example, suppose it takes 10 msec to measure one m/z value and the associated number of ions (abundance). To measure 100 such ions sequentially with a point ion detector would necessitate 1000 msec (1 sec) for the array detector, the time is still 10 msec because all ions arrive at the same time. Therefore, when it is important to be able to measure a range of ion m/z values in a short space of time, the array detector is advantageous. 

Physical Properties. Physical properties of waste as fuels are defined in accordance with the specific materials under consideration. The greatest degree of definition exists for wood and related biofuels. The least degree of definition exists for MSW, related RDF products, and the broad array of ha2ardous wastes. Table 3 compares the physical property data of some representative combustible wastes with the traditional fossil fuel bituminous coal. The soHd organic wastes typically have specific gravities or bulk densities much lower than those associated with coal and lignite. 

Fig. 9. High power array of phase coupled GaAs/AlGaAs lasers mounted -side down on a thermal heat sink. The tt/2 shift of the neighboring lasers is indicated by the + and — signs. The output pattern consists of two dominant peaks, each associated with the lasers of the same phase, and much weaker...

Quinone Methides. The reaction between aldehydes and alkylphenols can also be base-cataly2ed. Under mild conditions, 2,6-DTBP reacts with formaldehyde in the presence of a base to produce the methylol derivative (22) which reacts further with base to eliminate a molecule of water and form a reactive intermediate, the quinone methide (23). Quinone methides undergo a broad array of transformations by way of addition reactions. These molecules ate conjugated homologues of vinyl ketones, but are more reactive because of the driving force associated with rearomatization after addition. An example of this type of addition is between the quinone methide and methanol to produce the substituted ben2yl methyl ether (24). 

Decomposition Flame Arresters Above certain minimum pipe diameters, temperatures, and pressures, some gases may propagate decomposition flames in the absence of oxidant. Special in-line arresters have been developed (Fig. 26-27). Both deflagration and detonation flames of acetylene have been arrested by hydrauhc valve arresters, packed beds (which can be additionally water-wetted), and arrays of parallel sintered metal elements. Information on hydraulic and packed-bed arresters can be found in the Compressed Gas Association Pamphlet G1.3, Acetylene Transmission for Chemical Synthesis. Special arresters have also been used for ethylene in 1000- to 1500-psi transmission lines and for ethylene oxide in process units. Since ethylene is not known to detonate in the absence of oxidant, these arresters were designed for in-line deflagration application. 

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