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Object-Oriented Programming in LabVIEW
Published in Rick Bitter, Taqi Mohiuddin, Matt Nawrocki, LabVIEW™ Advanced Programming Techniques, 2017
Rick Bitter, Taqi Mohiuddin, Matt Nawrocki
Every class requires two special methods. The first is the Constructor. The Constructor is called whenever an instance of the class is created. The purpose of the Constructor is to properly initialize a new object. Constructors can effectively do nothing, or can be very elaborate functions. As an example, a test instrument class for GPIB instruments would have to know their GPIB address. The application may also need to know which GPIB board they are being used on. When a test instrument object is instantiated, this information is passed to the function in the Constructor. This allows for the test instrument object to be initialized when it is created, requiring no additional configuration on the part of the programmer. Constructors are useful when uninitialized objects can cause problems. For example, if a test instrument object ends up with default GPIB address of 0 and you send a message to this instrument, it goes back to the system controller. In Section 10.7.1 we will implement Constructor functions in LabVIEW.
C++ and Objective C
Published in Paul W. Ross, The Handbook of Software for Engineers and Scientists, 2018
A special type of constructor is generated automatically by the C++ compiler. The compiler-provided default copy constructor does a member-by-member copy of the instance variables. The copy constructor is used when an object is passed by value, returned by value, or initialized with another object of the same class through assignment. The prototype for the copy constructor for Employee would look like this: Employee (const Employees, emp); and the implementation might be Employee::Employee(const Employee & emp) { empId = emp.idNumber(); fName = new char[strlen(emp.firstName()) + 1]; strcpy(fName, emp.firstName()); IName = new char[strlen(emp.lastName()) + 1]; strcpy(IName, emp.lastName()); }
Agents, Objects, and Frames
Published in Adrian A. Hopgood, Intelligent Systems for Engineers and Scientists, 2021
C++ allows the programmer to define special functions to be performed when a new instance is created or deleted. These are known, respectively, as the constructor and the destructor. The constructor is a member function whose name is identical to the name of the class, and it is typically used to set the initial values of some attributes. The destructor is defined in a similar way to the constructor, and its name is that of the class preceded by a tilde (~). It is mostly used to release memory when an instance is deleted. As an example, consider the definition for Sonic_pulse in C++:
Blockchain-enabled digital twin collaboration platform for heterogeneous socialized manufacturing resource management
Published in International Journal of Production Research, 2023
Ming Li, Yelin Fu, Qiqi Chen, Ting Qu
The structure consists of four types of participants. AbstractDigitalTwin defines the common interfaces for digital twins, which represent the common features for digital twins. DigitalTwin is the implementation of AbstractDigitalTwin, which acts as the runnable software object for a specific SMR, to which additional responsibilities can be attached. The Reconfigurator maintains the references to an AbstractDigitalTwin object and obtains a DigitalTwin object through its constructor. It also defines an interface that conforms to AbstractDigitalTwin's interface without concrete implementations, which invokes the same method of the injected DigitalTwins instead. Hence, the specific DTReconfigurators will inherit from the Reconfigurator and implement this interface with the additional responsibilities enclosed.
SBCDetector: a hybrid approach to detect second-order similarity or change
Published in International Journal of Computers and Applications, 2023
Filter: Within clone pairs, the authors observed that wherever a new overloaded method is created in RV, it is mapped to another different overloaded method of PV. Therefore, a constructor with two arguments maps to another overloaded method or constructor with the same or different argument list. Therefore, filtering identifies irrelevant clone pairs by lexical analysis of the argument list thus providing a list of valid clone pairs in form of ‘Signature Similarity’ (SS). It identifies the similarity among the signatures in form of generics and a parameter list for the fuzzy mapped pair. Another such similarity is ‘Type Similarity’ (TS) which is based on the generalized type of the entity in such a way that class must be mapped to class while method must be mapped to method only.
Application of a Hybrid Model Based on ICEEMDAN, Bayesian Hyperparameter Optimization GRU and the ARIMA in Nonferrous Metal Price Prediction
Published in Cybernetics and Systems, 2023
Yu-ting Huang, Yu-long Bai, Lin Ding, Ya-Jie Zhu, Yong-Jie Ma
Bayesian hyperparametric optimization is a more effective method to find hyperparameters than grid search. The Bayesian method describes the function to be optimized better through the a posteriori distribution (Gaussian process) of the constructor. As the number of training epochs increases, the posterior distribution is improved, and the algorithm determines the area worthy of exploration in the parameter space. When iterations are repeated, the algorithm balances the demand for exploration and utilization by learning the objective function. Each Gaussian process fits the known samples (previously explored points), and the posterior distribution is combined with the exploration strategy or EI (expected improvement) to determine the next point to be explored. The purpose of this process is to minimize the steps to find the superparameter combination of the optimal combination. The Bayesian optimization principle is shown in Figure 1(E). All programming works were implemented in the python 3.8 environment. The computational experiment is a Window equipped with a Intel(R) Core(TM) i5-1135G7 @ 2.40 GHz and 16.0 GB.