Pointers

The first part of the method involves sorting all the atoms into their appropriate cells. This sorting is rapid, and may be perfonned at every step. Then, within the force routine, pointers are used to scan tlirough the contents of cells, and calculate pair forces. This approach is very efficient for large systems with short-range forces. A certain amount of unnecessary work is done because the search region is cubic, not (as for the Verlet list) spherical. 

A compact aud readable iutroductiou to Moute Carlo, with examples aud exercises, plus useful pointers to the literature on lattice models. 

In order to trace (find, change, add, or delete) a segment in the database, the sequence in which the data arc read is important. Thus, the sequence of the hierarchical path is parent > child > siblings. The assignment of the data entities uses pointers. In our example, the hierarchical path to K is traced in Figure 5-fi. 

A counter-propagation network is a method for supervised learning which can be used for prediction, It has a two-layer architecture where each netiron in the upper layer, the Kohonen layer, has a corresponding netiron in the lower layer, the output layer (sec Figure 9-21). A trained counter-propagation network can be used as a look-up tabic a neuron in one layer is used as a pointer to the other layer. 

For more than three components extremely heavy algebra is generated in attempting to solve the implicit flux relations, and in general no usefully compact explicit solution is obtained. However, there are two interesting special cases in which explicit flux relations can be obtained with an arbitrary nutr er of components in the mixture. Neither would be expected to correspond accurately with physical situations of practical interest, but they may provide useful qualitative, or semi-quantitative pointers to the behavior of more accurate models. 

Pointer and neighbour arrays can be used to implement the Verlet neighbour list. 

The sensitivity of the balance. The sensitivity of the balance may conveniently be defined as the deflection of the balance pointer over the scale caused by an excess of i mg. on one of the pans. This factor differs according to the actual load on the pans, and it is usual to plot the sensitivity at a series of loads over the range within which the balance is to be used the sensitivity at any particular load may then be determined at once by reference to the curve. 

In the context of molecular dynamics, some additional pointers may help give a fuller perspective on the MD simulation operational process ... 

In its eadiest years, the printed ChemicalP hstracts provided lengthy abstracts that could often serve as surrogates for original documents. Derwent stiU does this in some instances, but CAS on the other hand strives to be a pointer to original documents. The volume of nonpatent and patent Hterature covered in CA dictates that complete abstracts are impractical, although CA indexing records can contain a wealth of detail not hinted at in abstracts. 

Brake and pulley method (usually for very small motors). Considerable care needs be taken in the construction and use of the brake and pulley. When conducting this test conditions should be such that a scale pointer remains practically stationary at any given load. Proper cooling, preferably water cooling, should be provided for the pulley. 

A suitable slip-coil, having tipproximtitely 700 turns of I mm diameter insulated wire, is passed axially over the motor and its two etids are connected to t centre-/ert galvanometer. When the motor is running, the gal ttnotiieter pointer will oscillate. The tuimber of oscillations should be cotmted in one direction only, that is to the left or to the right, for t period of, say. 20 seconds. 

Note The eutectic relays have an advantage by setting the pointer more closely in the field, based on the actual measurement of the load current. 

This can be checked with the help of a phase sequence indicator. This is a simple instrument that houses a small 30 motor, which rotates a pointer connected to the motor through a gearbox. The direction of rotation of the pointer will determine the phase. sequence of the system. 

Other techniques can be found elsewhere in this volume. The following list includes pointers to several of these techniques ... 

If dual-pointer instrument, be sure to read right pointer. 

The most frequently applied mechanical manometers in ventilation applications are fluid manometers, bur the following types are also used. The Bourdon tube is a small-voiume tube with an elliptic cross-section bent to the shape of a circular arc, the C-type. One end is open to the applied pressure while the other end is closed. The pressure inside the tube causes an elastic defonnation ot the tube and displaces the closed end, which is then converted, by means of a linkage mechanism, into the movement of a pointer. The Bourdon tube may be of a spiral or helical design as well. 

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