Property Implementation

There are two properties that display the name of the model, the Value property and the Implementation property. The Value property is not used by PSpice, but this property is sometimes displayed on the schematic instead of the PSpice model name. The Implementation property is the name of the PSpice model and it is the property used when creating the netlist. If you change the Value property to the name of your new model, nothing will change in the simulation. If you change the Implementation property to the name of your new model, the new model will be used. Always change the Implementation property. 

The Implementation property shows that the model for this diode is Dbteah. Suppose we want both Zener diodes in the circuit to use the model Dln4734A. Change the Implementation property to Dln4734A and type CTRL-F4 to close the spreadsheet and return to the schematic. In the schematic, the text Dbreak will change to D1H4734A ... 

Thus, when we change the model (Implementation property), the change will not be displayed on the screen. Click the Cancel button to return to the spreadsheet. 

Change the Implementation property to Dx and then type CTRL-F4 to close the spreadsheet to return to the schematic ... 

Note that the model Dx does not appear in the schematic. This is because, with predefined models like the D1N4001, the text D1N4001 displayed on the schematic is the Value property and not the Implementation property. Since the Implementation attribute has been changed to DX in the property spreadsheet, PSpice will use model Dx in the simulation. 

The PSpice model name (Implementation property) is displayed on the screen with breakout parts. When the model is changed, the changed model name appears on the schematic. This is because Capture assumes that you wish to change the breakout model to a different model, and that you wish to identify that model on the screen. Capture assumes that when you place a breakout part, you will change it. If you know you will be changing the model reference of a part, you should use the breakout parts. 

The dialog box shows that we are changing the Implementation property, which is the PSpice model. Change the value to Dbreak and then click the OK button ... 

It is possible to use the quantum states to predict the electronic properties of the melt. A typical procedure is to implement molecular dynamics simulations for the liquid, which pemiit the wavefiinctions to be detemiined at each time step of the simulation. As an example, one can use the eigenpairs for a given atomic configuration to calculate the optical conductivity. The real part of tire conductivity can be expressed as... 

The accuracy of most TB schemes is rather low, although some implementations may reach the accuracy of more advanced self-consistent LCAO methods (for examples of the latter see [18,19 and 20]). However, the advantages of TB are that it is fast, provides at least approximate electronic properties and can be used for quite large systems (e.g., thousands of atoms), unlike some of the more accurate condensed matter methods. TB results can also be used as input to detennine other properties (e.g., photoemission spectra) for which high accuracy is not essential. 

The principal idea behind the CSP approach is to use input from Classical Molecular Dynamics simulations, carried out for the process of interest as a first preliminary step, in order to simplify a quantum mechanical calculation, implemented in a subsequent, second step. This takes advantage of the fact that classical dynamics offers a reasonable description of many properties of molecular systems, in particular of average quantities. More specifically, the method uses classical MD simulations in order to determine effective... 

Tl le popularity of the MNDO, AMI and PM3 methods is due in large part to their implementation i n the MOPAC and AMP AC programs. The programs are able to perform many kinds of calculation and to calculate many different properties. 

The shift makes the potential deviate from the true potential, and so any calculated thermodynamic properties will be changed. The true values can be retrieved but it is difficult to do so, and the shifted potential is thus rarely used in real simulations. Moreover, while it is relatively straightforward to implement for a homogeneous system under the influence of a simple potential such as the Lennard-jones potential, it is not easy for inhomogeneous systems containing rnany different types of atom. 

Most practical implementations of drug-likeness use a computational model which takes as input the molecular structure, together with various properties, and predicts whether the molecule is drug-like or not. Some of these models may be very simple, such as a series of substructural filters. Only those molecules which pass all of these filters are output, Such filters can be used to eliminate molecules that contain inappropriate functionality. 

For example, if motion is eonstrained to take plaee within a reetangular region defined by0probability densities, whieh must be eontinuous) eauses A(x) to vanish at 0 and at Ex. Eikewise, B(y) must vanish at 0 and at Ey. To implement these eonstraints for A(x), one must linearly eombine the above two solutions exp(ix(2mEx/h2)E2) nd exp(-ix(2mEx/h2)E2) to aehieve a flinetion that vanishes at x=0 ... 

The thermodynamics and physical properties of the mixture to be separated are examined. VLE nodes and saddles, LLE binodal curves, etc, are labeled. Critical features and compositions of interest are identified. A stream is selected from the source Hst. This stream is either identified as meeting all the composition objectives of a destination, or else as in need of further processing. Once an opportunistic or strategic operation is selected and incorporated into the flow sheet, any new sources or destinations are added to the respective Hsts. If a strategic separation for dealing with a particular critical feature has been implemented, then that critical feature is no longer of concern. Alternatively, additional critical features may arise through the addition of new components such as a MSA. The process is repeated until the source Hst is empty and all destination specifications have been satisfied. 

The original objective of the ISO classification was to issue detailed standards for cemented carbides in terms of microstmcture, composition, and properties for quaUty control and performance rehabiUty. This objective, however, is yet to be realized. Increased emphasis on worldwide implementation of ISO 9000 standards and globalization of manufacturing, may lead the industry-at-large to adopt the ISO classification. 

There is much interest and concern for noise/vibration-free brake systems and there is much activity toward friction couples having reduced noise/vibration properties. In addition to better noise insulators, brake modifications in the form of different materials, different designs, and improved friction materials formulations and/or processes are being developed and implemented. 

Another implementation of homotopy-continuation methods is the use of problem-dependent homotopies that exploit some physical aspect of the problem. Vickeiy and Taylor [AIChE J., 32, 547 (1986)] utilized thermodynamic homotopies for K values and enthalpies to gradually move these properties from ideal to ac tual values so as to solve the MESH equations when veiy nonideal hquid solutions were involved. Taylor, Wayburn, and Vickeiy [I. Chem. E. Symp. Sen No. 104, B305 (1987)] used a pseudo-Murphree efficiency homotopy to move the solution of the MESH equations from a low efficiency, where httle separation occurs, to a higher and more reasonable efficiency. 

In the course of mixture separation, the composition and properties of both mobile phase (MP) and stationary phase (SP) are purposefully altered by means of introduction of some active components into the MP, which are absorbed by it and then sorbed by the SP (e.g. on a silica gel layer). This procedure enables a new principle of control over chromatographic process to be implemented, which enhances the selectivity of separation. As a possible way of controlling the chromatographic system s properties in TLC, the pH of the mobile phase and sorbent surface may be changed by means of partial air replacement by ammonia (a basic gaseous component) or carbon dioxide (an acidic one). 

In this chapter, we will review the effects of shock-wave deform.ation on material response after the completion of the shock cycle. The techniques and design parameters necessary to implement successful shock-recovery experiments in metallic and brittle solids will be discussed. The influence of shock parameters, including peak pressure and pulse duration, loading-rate effects, and the Bauschinger effect (in some shock-loaded materials) on postshock structure/property material behavior will be detailed. 

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