DIGITAL TWIN DATA ECOSYSTEM Flashcards
DIGITAL TWIN DATA ECOSYSTEM
Agenda
What are the End-user oriented layers and what are the data layers
Session (data-sync): It manage the communication between ussers and also manage the start and stop of communication of the users.
Data; here you define the syntax of you data
Application: End user layer, which protocol youuse to communicate (HTTP)
What are the layers of the data communication–the open systems interconnection models–Describing the network–
Physical (bits): how does your data is been transfered, coaxial - fiber -wireless( Profibus?)
**Data Link (frames): **Transmission of the data, coming and connected from the physical layer, between two nodes connected
Network (packets): adressing and traffic the multinode control. In all the network
Transport( segment): regulates the the transmission by segmenting the data between two points in the network, also do the quality checks, by means of all the data had been transfereed
Session (Data sync):
What are the parts of the architecture of the DT
How does the models of the dt communicate with each other
by means of ONTOLOGIES (dictionary of the models)
What are Context Graphs
Stores the data about the context–are different scenarios that are stored on the context graphs–Here you can try to do some changes in the digital twin before send the information to the real world
Explain the stakeholders Architectures
WHAT IS SYNCHRONIZATION
What are the primary reference clocks and anathomic clock
A main clock - a precision clock that provides timing signals to synchronise lower level clocks as part of a clock network.. It depends on the application, how accurate you want to synchronise
An atomic clock - measures time by monitoring the resonant frequency of atoms.
It is based on atoms having different energy levels
The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the caesium frequency.
REAL TIME VS DUE
TIME (network delay + processing delay).
Real time is the time your brain need to process a information (2 sec).
Due time: Network delay ( the time the communication or packages takes to moves from one node to another - network delays: delays on the network (depending on the kind of network you use)
Two main reasons for delays, but how to decreasse the delays in the DT
Overflow and delays. working with predictions, by means, your sensor meassure something, the data is been transfer to the dt, and the dt will only confirm WHAT HE ALREADY PREDICTED!!
2 categoeries of sensors
Point location sensors (statics) -
Moving Sensors (trucks - proximity sensors)
What are the TWO KINDS
OF DATA
Qualitatieve, more description data - difficult because you must give own interpretation
Problems/challenges with data
The interpretation its a problem, everuthing should be very good described!!–Different problems:
DISCRETE AND CONTINUOUS ATTRIBUTES
what are the TYPES OF DATA SETS?
Record (tables and rapports) - Graph (joining two maps) - Ordered (tables or rapports had been ordered, one variable must be set as reference)
What is Big data
Volume: Big data set - Variety: static and streaming–Velocity: the packages that you get - Veracity: Authencity
DATA QUALITY
What are the aspects that are studied on getting data with quality?
How to handling THE
MISSING DATA
What is Randomization?, why you should use it?
What is GENERALIZATION
?
What is PSEUDONYMISATION
What is DATA FUSION
