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February 8, 2019
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Our structural model of the urban system is shown in Figure 1, with the overall system treated as a set of subsystems providing resources and/or services: utility, transportation, public services, etc. The Residential Subsystem, for example, provides labor as a service to other services. Each of these subsystems is further decomposed, i.e. utilities include water

February 7, 2019
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Our structural model of the urban system is shown in Figure 1, with the overall system treated as a set of subsystems providing resources and/or services: utility, transportation, public services, etc. The Residential Subsystem, for example, provides labor as a service to other subsystems. Each of these subsystems is further decomposed, i.e. utilities include water

February 5, 2019
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Effective systems development begins with a clear set of objectives, captured as requirements. In terms of building a model, we must consider several different types of requirements: Model Architecture requirements – which urban systems should be part of the model Model Simulation requirements – which performance factors should be calculated Urban System requirements – what

January 31, 2019
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Effective systems development begins with a clear set of objectives, captured as requirements. In terms of building a model, we must consider several different types of requirements: Model Architecture requirements – which urban systems should be part of the model Model Simulation requirements – which performance factors should be calculated Urban System requirements – what

January 29, 2019
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Modeling urban communities has been designated as a high priority target for improved systems engineering . World population is increasingly urbanized. In the US, the percentage of the population in metropolitan areas has shifted from 7% in 1820 to 51% in 1920 to 82% today. China looks to make the same shift

October 16, 2018
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In Parts 5 – 9 of this blog series, we have built an expanded model of an autonomous vehicle while demonstrating how a federation of models in different software tools can become a unified specification of the system. Figure 1 shows the types of model elements and the types of connections that Syndeia has used

October 9, 2018
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As the project proceeds, extensive effort will be put into both the physical architecture and simulation and analysis and new software tools will come into play. In this part, we build the initial models in SysML and use them to generate models in Teamcenter PLM (Siemens) and Simulink (The MathWorks). These models remain connected for

October 3, 2018
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Just as testing is an important part of the system development, the test software package is an important part of the project software architecture. In our example, test management is handled by TestRail (Gurock Software GMBH). The general schema for TestRail is shown in Figure 1. Figure 1 TestRail intra-model connectivity and schema A Test

September 27, 2018
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Having initiated the requirements management process, the systems engineering team frequently moves on to a functional architecture of the system.  For our AV, the top-level “classifier” behavior has been captured in the simple state machine in Figure 1. The Initiation state involves the passenger entering a destination and the AV calculating an optimal route, before

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