HjorthReliabilityFunction (jreliability v2.0 API)

java.lang.Object
- org.jreliability.function.SequentialFunction
- - org.jreliability.function.common.HjorthReliabilityFunction

All Implemented Interfaces:

Function, ReliabilityFunction
```
public class HjorthReliabilityFunction
extends SequentialFunction
implements ReliabilityFunction
```
The HjorthReliabilityFunction represents the Hjorth ReliabilityFunction
R(x) = 1 - F(x) = (e^-((delta * x^2)/2)) / ((1 + beta * x)^(theta / beta))
with beta, delta, theta > 0.
While the parameter beta scales the reliabilityFunction, the parameters delta and theta determine the shape of the reliabilityFunction. This function is especially interesting since bathtub-shaped failure rates can be modeled.

Field Summary

Fields
Modifier and Type	Field	Description
`protected double`	`beta`	The `beta` parameter scales the `HjorthReliabilityFunction`.
`protected double`	`delta`	The `delta` parameter shapes the `HjorthReliabilityFunction`.
`protected double`	`theta`	The `theta` parameter shapes the `HjorthReliabilityFunction`.

Constructor Summary

Constructors
Constructor	Description
`HjorthReliabilityFunction(double beta, double delta, double theta)`	Constructs a `HjorthReliabilityFunction` with a given `beta`, `delta`, and `theta`.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

double getY(double x)
Returns the y value for y = f(x).
- Methods inherited from class org.jreliability.function.SequentialFunction
  getY
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
- Methods inherited from interface org.jreliability.function.Function
  getY

- Field Detail
  - beta
```
protected final double beta
```
    The beta parameter scales the HjorthReliabilityFunction.
  - delta
```
protected final double delta
```
    The delta parameter shapes the HjorthReliabilityFunction.
  - theta
```
protected final double theta
```
    The theta parameter shapes the HjorthReliabilityFunction.
- Constructor Detail
  - HjorthReliabilityFunction
```
public HjorthReliabilityFunction(double beta,
                                 double delta,
                                 double theta)
```
    Constructs a HjorthReliabilityFunction with a given beta, delta, and theta.
    
    Parameters:
    
    beta - the scale value
    
    delta - the first shape value
    
    theta - the second shape value
- Method Detail
  - getY
```
public double getY(double x)
```
    Description copied from interface: Function
    
    Returns the y value for y = f(x).
    
    Specified by:
    
    getY in interface Function
    
    Parameters:
    
    x - the x value
    
    Returns:
    
    the y for y = f(x)