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Auswahl der wissenschaftlichen Literatur zum Thema „Controlling software concept“
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Zeitschriftenartikel zum Thema "Controlling software concept"
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Cichos, Daniel, Patrick Kölsch und Jan Christian Aurich. „Concept for Planning and Controlling of Multiple, Parallel Engineering Changes in Manufacturing Systems“. Advanced Materials Research 1140 (August 2016): 497–504. http://dx.doi.org/10.4028/www.scientific.net/amr.1140.497.
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Manufacturing companies have to adapt existing factories due to changing customer demands and new technologies. The coordination of several engineering changes in manufacturing systems is a key factor for the efficiency of their implementation. In this paper, a concept for planning and controlling of multiple engineering changes is presented. The concept includes the preselection, planning and execution of engineering changes. The engineering changes can be classified with regard to their relevance and urgency. The needed work steps for the implementation are deduced from the software-based planning and the time schedule for the work steps is created. The work steps are monitored while executing and events are initiated, if necessary. The concept is implemented in a software demonstrator and validated through this software.
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Tkachuk, Nikolay V. „Concept of Integrated Environment of Reengineering for Complex Informating-Controlling Systems“. Journal of Automation and Information Sciences 35, Nr. 2 (2003): 1–8. http://dx.doi.org/10.1615/jautomatinfscien.v35.i2.10.
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Ohtsuki, T., T. Kawazoe und T. Masui. „Intelligent control system based on blackboard concept for wastewater treatment processes“. Water Science and Technology 37, Nr. 12 (01.06.1998): 77–85. http://dx.doi.org/10.2166/wst.1998.0506.
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An intelligent control system for wastewater treatment processes has been developed and applied to fullscale, high-rate, activated sludge process control. In this control system, multiple software agents that model the target system using their own modeling method collaborate by using data stored in an abstracted database named ‘blackboard’. The software agents, which are called ‘expert modules’, include a fuzzy expert system, a fuzzy controller, a theoretical activated sludge model, and evaluators of raw data acquired by various online sensors including a respirometer. In this paper, the difficulties of controlling an activated sludge system by using a single conventional strategy are briefly reviewed, then our approach to overcome these difficulties by using multiple modeling methods in the framework of an ‘intelligent control system’ is proposed. Case studies of applications to a high-rate activated sludge process that treats BOD and nitrogen of human excrement are also presented.
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Dodevska, Zorica, Vladimir Kvrgic, Marko Mihic und Boris Delibasic. „The concept and application of simplified robotic models“. Serbian Journal of Electrical Engineering 16, Nr. 3 (2019): 419–37. http://dx.doi.org/10.2298/sjee1903419d.
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The use of robotic models with the main functionalities of real objects together with the implementation of innovative technologies, augmented reality (AR) in this case, is the focus of the paper. Therefore, the concept of a simplified robotic model (SRM) is presented. This concept is important because it is useful for achieving the goals of engineering projects, which is especially justified prior to the construction of the real objects. It improves presentation, development, and education capabilities that are unavoidable segments of the project strategy. Additionally, it is possible to transfer developed solutions to the final objects after certain modifications. Multidisciplinary building of the unique SRM of the 3-axis centrifuge for pilot training is described, where multi-attribute decisionmaking is used to conduct some experiments. The application includes the use of a physical model, built from LEGO elements, software for controlling and monitoring the physical model, and an AR mobile app.
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Li, Shan Shan, Peng Wang, Xu Han, Jin Feng Liu und Xiao Gang Zhou. „Investigation of Ventilation Monitoring and Controlling System for Supercavitation Experiment in the Water-Tunnel Based on Configuration Software“. Applied Mechanics and Materials 556-562 (Mai 2014): 3219–22. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3219.
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The supercavitation weapon is a new concept weapon moving at a high speed underwater, which is devised applying the characteristic of supercavitation reducing the resistance of water, and it may be widely used in the future. The present ventilating system has many shortcomings, such as less automation and numerous data cannot be measured and recorded timely. In this paper, the automatic monitor and control ventilating system of supercavitation water-tunnel was developed using configuration software and PLC. All parameters can be measured, recorded and displayed automatically via using of the system. It has many advantages such as higher automation, convenience, and easy maintenance.
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Magaña, A., und G. Prof Reinhart. „Herstellerneutrale Programmierung von Robotern*/Manufacturer-independent programming of robots - A software architecture concept for controlling and programming heterogeneous robotic systems“. wt Werkstattstechnik online 107, Nr. 09 (2017): 594–99. http://dx.doi.org/10.37544/1436-4980-2017-09-32.
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Industrieroboter sind zu einer Schlüsseltechnologie in der Produktion geworden. Mit dem steigenden Einsatz von diversen Robotersystemen wächst das Bedürfnis, deren Kompatibilität zu steigern. Heutzutage gibt es keine Technologie in der Industrie, die eine standardisierte Programmierung und Steuerung von verschiedenen Robotersystemen gewährleisten kann. Dieser Fachbeitrag präsentiert ein einheitliches Konzept, welches die Anwendung von herstellerneutralen Roboterapplikationen ermöglicht. Industrial robots have become a key technology in production. The increasing use of various robotic systems, raises the need to enhance their compatibilit.y Nowadays, there is no technology in the industry to guarantee a standardized programming and control of different robot systems. This article presents a concept enabling the use of manufacturer-independent robot applications.
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GUPTA, ANSHU, REECHA KAPUR und P. C. JHA. „CONSIDERING TESTING EFFICIENCY AND TESTING RESOURCE CONSUMPTION VARIATIONS IN ESTIMATING SOFTWARE RELIABILITY“. International Journal of Reliability, Quality and Safety Engineering 15, Nr. 02 (April 2008): 77–91. http://dx.doi.org/10.1142/s0218539308002940.
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Advances in software technologies have promoted the growth of computer-related applications to a great extent. Building quality in terms of reliability of the software has become one of the main issues for software developers. Software testing is necessary to build highly reliable software. Monitoring and controlling the resource utilization, measuring and controlling the progress of testing, efficiency of testing and debugging personals and reliability growth are important for effective management the testing phase and meeting the quality objectives. Over the past 35 years many Software reliability growth models (SRGM) are proposed to accomplish the above-mentioned activities related to the software testing. From the literature it appears that most of the SRGM do not account the changes in the testing effort consumption. During the testing process especially in the beginning and towards the end of the testing frequent changes are observed in testing resource consumption due to changes in testing strategy, team constitution, schedule pressures etc. Apart from this testing efficiency plays a major role determining the progress of the testing process. In this paper we incorporate the important concept of testing resource consumption variations for Weibull type testing effort functions and testing efficiency in software reliability growth modeling. The performance of the proposed models is demonstrated through two real life data sets existing in literature. The experimental result shows fairly accurate estimating capabilities of the proposed models.
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Sakr, Aziz, und Zoltán Orbán. „Controlling the failure behavior of FRP-reinforced concrete elements“. Pollack Periodica 16, Nr. 1 (25.03.2021): 38–44. http://dx.doi.org/10.1556/606.2020.00168.
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AbstractConcrete indeterminate flexural members represented by continuous beams reinforced with both fiber-reinforced polymers and steel bars in a way that allows for moment redistribution at failure are analyzed. The efficiency of introducing steel bars in the critical sections where plastic hinges are likely to form is evaluated in terms of reliability. Monte Carlo simulation and the concept of comparative reliability are both employed. Ultimately, the effect of different design parameters on the strength reduction factor is evaluated.
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Rajeev Kumar, M., N. K. Senthil Kumar und D. Balaji. „Franchise and retail management system“. International Journal of Engineering & Technology 7, Nr. 2.20 (18.04.2018): 144. http://dx.doi.org/10.14419/ijet.v7i2.20.12795.
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The main concept of franchise and retail management system is to make a very user friendly environment for all the retailers and franchisee. The software will provide real-time communication between franchisees or the controlling office over the Internet. This online system will be used both at the controlling office and the franchisee centers. It will cover registration, login and order facility for franchisees etc. and store those details at the head office's centralized database. Its main application is to maintain franchisee details such as business partner details, agreement validity, meetings to be organized etc. and to integrate a number of franchisees irrespective of geographical boundaries to facilitate easy monitoring and reporting to the main office.
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Preuss, Nils, Georg Staudter, Moritz Weber, Reiner Anderl und Peter F. Pelz. „Methods and Technologies for Research- and Metadata Management in Collaborative Experimental Research“. Applied Mechanics and Materials 885 (November 2018): 170–83. http://dx.doi.org/10.4028/www.scientific.net/amm.885.170.
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Newly developed technologies and methods for the purpose of controlling uncertainty in technical systems must be proven and validated against reliable experimental studies. The availability of descriptive metadata is mandatory to enable long term usability and sharing of such experimental research data. This article introduces a concept for a software independent solution for managing data in collaborative research environments. The proposed approach leverages the advantages of capturing metadata in a uniform, modular data structure and providing software independent access to a centralized data repository as well as its contents by means of a web-application. The article presents a prototype implementation of the proposed approach and discusses its application on the demonstrator test rig of a collaborative research centre in the field of mechanical engineering.
Dissertationen zum Thema "Controlling software concept"
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Bibrová, Veronika. „Využití controllingu v podniku“. Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2021. http://www.nusl.cz/ntk/nusl-444223.
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This master´s thesis deals with the analysis of the use of controlling in a selected company. It is divided into three parts, the first part contains the theoretical knowledge about controlling needed to process the analytical and design part of the thesis. The second part is focused on the analysis of the current state of controlling in a selected company. In the last, third part of the diploma thesis, is the results of the analysis of the current state of controlling in the selected company. These are summarized and have possible solutions to improve the controlling system in the company.
Buchteile zum Thema "Controlling software concept"
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Meyer, Thomas, und Christian Tschudin. „Robust Network Services with Distributed Code Rewriting“. In Software Design and Development, 506–26. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4301-7.ch025.
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Nature does not know the concept of a dedicated controlling instance; instead, “control” is an emergent phenomenon. This is in stark contrast with computer networking where protocol control loops are (seemingly) in charge: while the functional aspect of a networking service can be well mastered, the dynamic behavior is still difficult to understand and even control. In this chapter, we present a methodology how to design distributed software systems that are dynamically stable and robust in execution. It is based on continuously replicating a system’s own code base in order to thwart unreliable execution and even accidental code changes. The crucial part is to design the system such that it regulates its own replication. This can be achieved by an execution environment inspired by chemistry to which we add the concept of self-rewriting programs (Quines). With a link load balancing example we show how to exploit competition and cooperation in a self-rewriting service implementation.
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Cruz-Cunha, Maria Manuela, Goran D. Putnik und João Varajão. „The Use of Customer Relationship Management Software in Meta-Enterprises for Virtual Enterprise Integration“. In Enterprise Resource Planning, 245–59. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-4153-2.ch015.
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To make the Virtual Enterprise (VE) a real, competitive, and widely implemented organizational and management concept, it is fundamental to assure that the requirements of this organizational model are achieved in the several phases of the Virtual Enterprise life-cycle. The support to VE (comprising design, creation, operation and reconfiguration) must be assured by meta-enterprises based on a broker and computer-aided tools, capable of managing, controlling and enabling virtual enterprise creation/operation/reconfiguration, which may represent a strong contribution towards the VE performance. The chapter introduces the VE model requirements, focuses one specific meta-enterprise environment called the Market of Resources, and introduces the incorporation of CRM in this environment as one of the computer-aided systems.
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Sahu, Himanshu, und Misha Hungyo. „Introduction to SDN and NFV“. In Advances in Systems Analysis, Software Engineering, and High Performance Computing, 1–25. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3640-6.ch001.
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Software defined network (SDN) and Network function virtualization (NFV) are the two new networking paradigms changing the way traditional networks work. SDN works on the concept of centralization so that all the decisions related to controlling the networks is done in a centralized place in a centralized manner. To provide a centralized control, SDN decouples the control plane and data from the traditional routing devices to take it in the centralized position. The data plane is still intact with the routing devices, but they now become mere forwarding devices and the decisions are made at the centralized place called the controller. The controller is basically the x86 server that is connected to the forwarding devices and communicates with them for all control decisions such as routing. NFV is based on virtualization of network functions in the form of software running over a high end server. This kind of virtualization helps in easy setup of networks as well as easy migration.
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Meyer, Thomas, und Christian Tschudin. „Robust Network Services with Distributed Code Rewriting“. In Biologically Inspired Networking and Sensing, 36–57. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-61350-092-7.ch003.
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Nature does not know the concept of a dedicated controlling instance; instead, “control” is an emergent phenomenon. This is in stark contrast with computer networking where protocol control loops are (seemingly) in charge: while the functional aspect of a networking service can be well mastered, the dynamic behavior is still difficult to understand and even control. In this chapter, we present a methodology how to design distributed software systems that are dynamically stable and robust in execution. It is based on continuously replicating a system’s own code base in order to thwart unreliable execution and even accidental code changes. The crucial part is to design the system such that it regulates its own replication. This can be achieved by an execution environment inspired by chemistry to which we add the concept of self-rewriting programs (Quines). With a link load balancing example we show how to exploit competition and cooperation in a self-rewriting service implementation.
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Guah, Matthew. „Service-Oriented Architecture“. In Managing Very Large IT Projects in Businesses and Organizations, 130–50. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-546-7.ch009.
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For centuries, organizations have been trying to exchange information between their applications by linking them together. However, such application integration has not been as successful as organizations have hoped. With the introduction of SOA, application integration is more successful than the previous integration techniques. SOA is a design philosophy in which resources are cleanly partitioned into remotely accessible software components performing self-contained functionalities, called services. The reinvention of SOA in recent times is attributed to the rise of Web Services, which has become commonly used in VLITP to expose services within the host organization. However SOA can also be implemented with other service exposing techniques. SOA is based on the concept of separation of concerns, realizing that no single entity can be best at everything. SOA is usually implemented using an Enterprise Service Bus (ESB). The ESB is responsible for routing, prioritizing, scheduling, monitoring, and controlling the flow of traffic between services and therefore forms the middleware for Service Orientation.
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Møller, Charles. „Next-Generation Enterprise Systems“. In Enterprise Information Systems, 1789–96. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-61692-852-0.ch802.
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“ERP is dead - long live ERP II” was the title of a path breaking research note from Gartner Group (Bond, Genovese, Miklovic, Wood, Zrimsek, & Rayner, 2000). In this research note, Gartner Group envisions how the ERP vendors respond to market challenges and how ERP and ERP strategies evolved by 2005. Gartner Group defines ERP II as a transformation of ERP (Enterprise Resource Planning), and today the major vendors have adopted this concept in their contemporary ERP packages. ERP (Enterprise Resource Planning) is an important concept to industry. Enterprises are increasingly implementing packaged ERP systems. A recent study confirmed that over 90% of the 500 largest Danish enterprises have adopted one or more ERP system. Further, the study found the systems to be of an average age of 2.8 years and decreasing (Møller, 2005a). ERP is a standardized software package designed to integrate the internal value chain of an enterprise (Klaus, Rosemann, & Gable, 2000). In 2002, the five major ERP vendors were: (i) SAP; (ii) Oracle; (iii) Peoplesoft; (iv) SAGE; and (v) Microsoft Business Solutions. They controled almost 50% of the ERP market (c.f. Table 1) and consequently the corporate infrastructure is dominated by the design of these systems and the vendors. By 2006, the market is consolidated and many of the smaller vendors have been merged with larger vendors. Oracle acquired PeopleSoft and JD Edwards and the global market seems to be dominated by SAP, Oracle and Microsoft. According to Nah (2002) the American Production and Inventory Control Society (APICS) defines ERP as: “a method for the effective planning and controlling of all the resources needed to take, make, ship and account for customer orders in a manufacturing, distribution or service company.” This definition expresses ERP as a tool but ERP is also a management vision and an agency of change and ERP has been attributed to almost any good or bad that IT may bring about in business. In the late 1990s, the ERP hype was primarily motivated by companies rushing to prepare for Y2K (Calloway, 2000). Then, after a short recession the adoption of ERP has continued. Davenport’s sequel on enterprise systems (Davenport, 1998, 2000; Davenport & Brooks, 2004) illustrates the changing business perspective on ERP and the ERP hype. Davenport (1998) sums up the first wave of experiences from implementing ERP systems in a much cited paper on “putting the enterprise system into the enterprise,” and points to the new potential business impact of the ERP systems. The discussion evolved over the first enthusiastic expectations, continued over a growing number of horror stories about failed or out-of-control projects, toward a renewed hype of expectations on e-business and SCM. The ERP II concept is the software industry’s perception of the new business challenges and the vision addresses the issues of e-business integration in the supply chain. ERP II is the next-generation ERP concept and in a few years from now the ERP II vision is going to be institutionalized into the infrastructure of most enterprises. This article will portray the conceptual framework of ERP II.
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Møller, Charles. „Next-Generation Enterprise Systems“. In Business Information Systems, 2126–33. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-61520-969-9.ch129.
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“ERP is dead - long live ERP II” was the title of a path breaking research note from Gartner Group (Bond, Genovese, Miklovic, Wood, Zrimsek, & Rayner, 2000). In this research note, Gartner Group envisions how the ERP vendors respond to market challenges and how ERP and ERP strategies evolved by 2005. Gartner Group defines ERP II as a transformation of ERP (Enterprise Resource Planning), and today the major vendors have adopted this concept in their contemporary ERP packages. ERP (Enterprise Resource Planning) is an important concept to industry. Enterprises are increasingly implementing packaged ERP systems. A recent study confirmed that over 90% of the 500 largest Danish enterprises have adopted one or more ERP system. Further, the study found the systems to be of an average age of 2.8 years and decreasing (Møller, 2005a). ERP is a standardized software package designed to integrate the internal value chain of an enterprise (Klaus, Rosemann, & Gable, 2000). In 2002, the five major ERP vendors were: (i) SAP; (ii) Oracle; (iii) Peoplesoft; (iv) SAGE; and (v) Microsoft Business Solutions. They controled almost 50% of the ERP market (c.f. Table 1) and consequently the corporate infrastructure is dominated by the design of these systems and the vendors. By 2006, the market is consolidated and many of the smaller vendors have been merged with larger vendors. Oracle acquired PeopleSoft and JD Edwards and the global market seems to be dominated by SAP, Oracle and Microsoft. According to Nah (2002) the American Production and Inventory Control Society (APICS) defines ERP as: “a method for the effective planning and controlling of all the resources needed to take, make, ship and account for customer orders in a manufacturing, distribution or service company.” This definition expresses ERP as a tool but ERP is also a management vision and an agency of change and ERP has been attributed to almost any good or bad that IT may bring about in business. In the late 1990s, the ERP hype was primarily motivated by companies rushing to prepare for Y2K (Calloway, 2000). Then, after a short recession the adoption of ERP has continued. Davenport’s sequel on enterprise systems (Davenport, 1998, 2000; Davenport & Brooks, 2004) illustrates the changing business perspective on ERP and the ERP hype. Davenport (1998) sums up the first wave of experiences from implementing ERP systems in a much cited paper on “putting the enterprise system into the enterprise,” and points to the new potential business impact of the ERP systems. The discussion evolved over the first enthusiastic expectations, continued over a growing number of horror stories about failed or out-of-control projects, toward a renewed hype of expectations on e-business and SCM. The ERP II concept is the software industry’s perception of the new business challenges and the vision addresses the issues of e-business integration in the supply chain. ERP II is the next-generation ERP concept and in a few years from now the ERP II vision is going to be institutionalized into the infrastructure of most enterprises. This article will portray the conceptual framework of ERP II.
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Selfridge, Oliver G. „Had We But World Enough and Time...“ In Perspectives on Adaptation in Natural and Artificial Systems. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195162929.003.0011.
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This chapter will cover a general discussion of changes and improvement in software systems. Nearly all such systems are today programmed; that is, all the steps that the software should perform are specified ahead of time by the programmer. There are three areas of exception to that overwhelmingly usual practice: the first is an increasing (although still comparatively minute) effort still called machine learning; a second is a popular but ill-defined practice termed neural networks; and the third is evolutionary computation (or genetic algorithms), the kind that was invented by John Holland and which has been gathering momentum and success for some time. This chapter will focus on some special aspects of that evolutionary process, and we propose extensions to those techniques and approaches. The basic idea is to regard each evolutionary unit as a control structure; we then build complexity by controlling each unit with others, each subject to continuing adaptation and learning. The essence of the control unit is its triple soul in a kind of feedback loop: it has a power to act, that is, to exert some choice of action; it has a sensor to perceive and filter the response that is external to it; and it must evaluate that response to generate and influence its next control action. The general evolutionary or genetic system uses but a single evolutionary feedback—life on earth, for example, considers "survival" as its primary feedback. Here the generational improvements reside in the genotype, and are merely expressed in the individual organisms that are the successive programs. This chapter stresses the concept of control by evolving units; the essence of the control is the establishment of evaluation functions in other units. It is then useful to consider each evaluation function as a lower-level purpose. A piece of evolutionary software, in this way of looking at it, is then a complex expression of a purpose structure, and all the units evolve with separate and usually different purposes. The conceptual and linguistic vocabularies must then be established to deal with the many different kinds and levels of purposes. Higher-level purposes can be as general as moral values, and the lowest ones may be merely setpoints that control where muscles or motors are trying to go.
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Pala, Kiran, und Suryakanth V. Gangashetty. „Virtual Environments Can Mediate Continuous Learning“. In Technologies for Inclusive Education, 90–121. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2530-3.ch005.
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In human beings, learning is a life-long and continuous process; it can encompass both active and passive activities in accordance with social changes and the development of society. In this era, the development and use of technologies have changed the face of information accessibility. Similarly, such technologies facilitate learners with new and different options to engage in learning through interactive tasks and content delivered through CD-ROMs, websites, communication software on the internet, and virtual games, which have had a significant impact on human learning and education. The significant question arises on which type of content and what way of representation of the content are required in this connection. Researchers need to reconsider any approach to teaching or providing platform to learners which is concerned with an explanation of how learning ability and development are prompted by an exposure to the target in view of the dramatic differences in experiences of learners. This chapter defines the concept of Virtual Environment (VE) based learning discussing how a VE differs from the traditional classrooms approaches. Thus, this chapter presents a unique framework and a formalism for interactive linearity or non-linearity in controlling the structure of learning activity or interaction. These activities aim at addressing the relationship between the main constructs targeted toward developing a VE. This chapter takes stock of various distributed models and projects a framework on how the learners can be engaged continuously in learning activities according to their previous linguistic and educational experiences. It also focuses on how a learner can be reported to the admin or tutor and self assessments.
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Kizza, Joseph, und Florence Migga Kizza. „Perimeter Defense; The Firewall“. In Securing the Information Infrastructure, 209–38. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-379-1.ch011.
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As companies increasingly build private networks and connect them onto the Internet, securing such private networks has become a great concern. These networks are facing threats from two fronts: the external Internet and the users from within the company network. This requires security protocols that will effectively deal with these two fronts by first restricting access to the network from outside and controlling access between subnets from within. Ideal protocols to do such tasks are found in firewalls. A firewall is hardware, software, or a combination of both that monitors and filters traffic packets that attempt to either enter or leave the protected private network. It is a tool that separates a protected network or part of a network, and now increasingly a user’s personal computer (PC), from an unprotected network—the “bad network,” like the Internet.
Konferenzberichte zum Thema "Controlling software concept"
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Fabbrini, Fabrizio, Mario Fusani, Stefania Gnesi und Giuseppe Lami. „Controlling Requirements Evolution: a Formal Concept Analysis-Based Approach“. In International Conference on Software Engineering Advances (ICSEA 2007). IEEE, 2007. http://dx.doi.org/10.1109/icsea.2007.24.
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Karizi, Nasim, T. Agami Reddy und Partha Dasgupta. „Developing a Baseline Strategy for Controlling Blinds in Buildings“. In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62829.
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Automated day-lighting systems can modulate window blinds and electrical lights for maintaining the proper illumination levels and save significant electrical energy in buildings. This paper presents an initial work toward developing an automated installation and maintenance of a generic daylighting system which is able to self-calibrate and adapt to the building needs with minimal human intervention. The system operates based on information provided by a wireless sensor network, and processed through learning algorithms and feedback control principle. This paper focuses on a preliminary simulation study to establish a control baseline and identifies the required elements. It demonstrates the concept, using daylighting simulation software in the context of a test cell which represents a virtual office space. A startup baseline for the optimal blind slat angle settings for the windows is developed with the objective of maintaining uniform lighting levels on a horizontal surface inside the test cell. The lighting baseline simulations are limited to specific times and days of a year to reduce and optimize the simulation process and are applied to predict the optimal blind slat angles for other days of the year. This paper presents and discusses the results of such an analysis including an extrapolation to all year round.
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Craveiro, Gisele S., Emilly Espildora und Andrés M. Martano. „Cuidando do Meu Bairro 2.0: Acesso à informação e monitoramento dos gastos da cidade em tempo real“. In Simpósio Brasileiro de Sistemas Multimídia e Web. Sociedade Brasileira de Computação, 2020. http://dx.doi.org/10.5753/webmedia_estendido.2020.13076.
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This work aims to present the platform on government accountability. named “Cuidando do Meu Bairro” ("Caring for My Neighborhood"), which is a social platform for monitoring and controlling the town´s public spending. The work shows its concept evolution based on stakeholders feedback during the last 8 years that the platform has been contributing to governmental accountability and social participation, The functionalities and software architecture are presented. Also, the main outcomes and social impact that this project provided on civic education, fight against corruption, public transparency and social participation are briefly presented.
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Nanda Kumar, Kishen, Luigi Moroni, Abhijart Kongto, Bao Tran Thanh, Nghia Nguyen Hoang, Lam Tran Tuan und Chau Do Ngoc. „Controlling Costs and NPT: An Economical Approach to Wellbore Strengthening Offshore Vietnam“. In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21377-ms.
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Abstract There are many challenges while drilling highly inclined and depleted formations offshore Vietnam that result in various wellbore stability issues such as severe losses, stuck pipe, cavings, tight-hole and pack-offs. These issues may be independent of mud type and can occur when drilling with both oil/synthetic-based and water-based muds. These depleted sections typically consist of sandstones interbedded with claystone & siltstones. Traditionally, the wellbore strengthening fluids solution applied to drill through these sections with synthetic and water-based mud in Vietnam faced limited success. Wellbore strengthening (WBS) is a proven and effective solution especially for narrow-drilling margin and depleted formations. The basic concept of WBS relies on the creation and simultaneous plugging of small fractures with appropriate WBS material. The resulting elevated stress around the wellbore strengthens the borehole by creating an increased hoop stress that leads to an increase in near wellbore stresses. Proprietary modelling software can be used to calculate the pressure induced fracture apertures for wellbore strengthening applications and determine the optimum particle size range to bridge these fractures, allowing fluids to be designed to minimise wellbore instability. This design process was used to optimize material additives to effectively bridge fractures, for wellbore strengthening, and pore throat openings in porous/permeable formations for the prevention of seepage losses and differential sticking. A review of the application procedure identified the optimum method to apply the wellbore strengthening material which would minimise product consumption and reduce well costs. After extensive modelling simulations and testing, this fluid design was applied to drill two challenging wells in Vietnam. This paper presents the process of modelling, based on formation geo-mechanics information, customization and laboratory testing of the fluids design coupled with a successful and economical method of application in the field. Application of this process enabled the operator to drill through the depleted challenging sections with a maximum overbalance pressure of 3,200 psi, conduct logging and coring runs and complete the well at a lower cost and with zero fluids related non-productive time compared to previous wells.
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Sidorov, I. A., R. O. Kostromin und A. G. Feoktistov. „System for monitoring parameters of functioning infrastructure objects and their external environment“. In The International Workshop on Information, Computation, and Control Systems for Distributed Environments. Crossref, 2020. http://dx.doi.org/10.47350/iccs-de.2020.23.
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The paper addresses relevant issues applying the concept of Industry 4.0 in related to modeling infrastructure objects at the Baikal natural territory that use environmentally friendly technologies. In particular, the use of heat pumps belongs to such technologies, since this enables us to reduce air emissions. Object models are designed on the basis of their digital twins. Digital twins are intended to reflect the structure and processes of object functioning. In addition, we plan to delegate them the decision-making in managing these objects in real-time. Such a digital twin has to become smarter over time. This virtual entity has to gain knowledge and skills to select optimal scenarios for controlling object and improving its functioning parameters. Therefore, the initial problem in its development is creating a monitoring system for the collection, unification, aggregation, storage, and transmission of subject-oriented data. Such data include information about the object operation and environmental state. The data must be promptly obtained from peripheral equipment (controlling and measuring devices). For the effective operation of a digital twin, we have to partially transfer functions of primary data processing, their intellectual analysis and decision-making to the controlling and measuring devices. To this end, we use agents that implement software on peripheral equipment.
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Hossain, Md Abir, Jacqueline R. Cottingham und Calvin M. Stewart. „A Reduced Order Modeling Approach to Probabilistic Creep-Damage Predictions in Finite Element Analysis“. In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58480.
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Abstract This paper introduces a computationally efficient Reduced Order Modeling (ROM) approach for the probabilistic prediction of creep-damage failure. Component-level probabilistic simulations are needed to assess the reliability and safety of high-temperature components. Full-scale probabilistic creep-damage modeling in finite element (FE) approach is computationally expensive requiring many hundreds of simulations to replicate the uncertainty of component failure. To that end, ROM is proposed to minimize the elevated computational cost while controlling the loss of accuracy. It is proposed that full-scale probabilistic simulations can be completed in 1D at a reduced cost, the extremum conditions extracted, and those conditions applied for lower cost 2D/3D probabilistic simulations of components that capture the mean and uncertainty of failure. The probabilistic Sine-hyperbolic (Sinh) model is selected which in previous work was calibrated to alloy 304 stainless steel. The Sinh model includes probability density functions (pdfs) for test condition (stress and temperature), initial damage (i.e., microstructure), and material properties uncertainty. The Sinh model is programmed into ANSYS finite element software using the USERCREEP.F material subroutine. First, the Sinh model and FE code are subject to verification and validation to affirm the accuracy of the simulations. Numerous Monte Carlo simulations are executed in a 1D model to generate probabilistic creep deformation, damage, and rupture data. This data is analyzed and the probabilistic parameters corresponding to extreme creep response are extracted. The ROM concept is applied where only the extreme conditions are applied in the 2D probabilistic prediction of a component. The probabilistic predictions between the 1D and 2D model is compared to assess ROM for creep. The accuracy of the probabilistic prediction employing the ROM approach will potentially reduce the time and cost of simulating complex engineering systems. Future studies will introduce multi-stage Sinh, stochasticity, and spatial uncertainty for improved prediction.
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Jonas, M. „Detection of GNSS Horizontal Position Error Using 3D-Track Map“. In 2013 Joint Rail Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/jrc2013-2445.
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The increasing progress in the field of satellite navigation systems (GNSS, SBAS) in the recent decades supports effort to use it for determination of train position for railway safety-related systems. Satellite-based augmentation systems (SBAS) such as WAAS in the USA, and EGNOS in Europe, are available and a new global satellite navigation system Galileo is being built by the European GNSS agency (GSA). The currently available SBAS systems were developed in order to satisfy aviation requirements. But the safety concept on railways is very different from the aviation safety concept. The railway safety concept in Europe is determined by means of the CENELEC standards (EN 50126, EN 50129, EN IEC 61508). So it is necessary to find a way how to use GNSS systems in accordance with strict railway standards. The main problem is attainment of sufficient integrity of position solution [5, 12]. Satisfaction of safety integrity level 4 (SIL4) is necessary for railways [6, 7, 8, 9]. At the beginning, it can provide low-cost controlling system for the local, regional and freight railway lines. GNSS provides a 3D position (position in horizontal and vertical plane). The value of altitude is cruical for application in aviation, in ground transportation this value is not so important. On the contrary, the value of horizontal position is cruical. For the purpose of increasing the integrity of GNSS-based position determination we propose a new method of the detection of a GNSS horizontal position error based on the relation between vertical and horizontal position error. As was mentioned for example in [4], as GPS is a three dimensional positioning system, errors between any two coordinates may be correlated, and so there can be relations between errors in individual dimensions. The general 3D GPS-based position solution can be divided into two parts: - 2D horizontal position - 1D vertical position We investigated the relation between errors in the horizontal and vertical plane in real data measured by a GNSS receiver. It was static measurement and the antenna location was exactly known. The vertical position provided by GNSS is not constant. In ground transportation we can mostly make an assumption of nearly a constant value of altitude during the ride. Especially in railway transportation the changing of altitude during the ride is limited by many factors (railway standards, properties of track) So we investigate the possibility of using values of altitude to estimate a position error in the horizontal plane. As the receiver determines the values of the vertical position in real time, the detection of the horizontal position error based on the values of altitude can help detect the actual position error in horizontal plane during the train ride also in real time. The sensitivity of this method to errors in pseudoranges (error caused by multipath) was also investigated. This was done by simulation with software receiver Pegasus (Eurocontrol). The analysis was based on real data from GNSS.
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Hernandez, Krista, Dania Wilson, Kyle Ressel, Justus Nwoke, Martin Soto und M. Salim Azzouz. „Gear Based Quasi-Continuous Variable Transmission for Wind Turbines“. In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50683.
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Over the past decade wind turbines have been proven to be a competitive contender to produce cheap electricity. Their output electrical power went from few dozens of watts to several megawatts, and this trend is continuing to increase as they become larger in size. Most of these wind turbines are typically regulated through a set of controls acting on the electricity generator workload. These controls are achieved through the use of power electronics controlling the electrical load on the generator for variable speed wind turbine. This paper explores the possibility of implementing an alternative control system in variable wind speed turbines using a special gearbox with a high number of close consecutive discrete gear ratios. The proposed gear based Quasi-Continuous Variable Transmission, called QCVT, allows a variable speed at the input shaft and delivers a quasi-constant speed at the output shaft of the gearbox. The system consists of a special drivetrain assembly of spur gears run and controlled automatically through a set of clutch power shifters. The clutches are used to shift a set of compound gears, thus modifying the drivetrain total gear ratio. The designed system can produce up to 625 gear ratios and acts as a quasi-continuously variable transmission between the wind turbine hub and the electricity generator which requires a constant entry speed delivering a frequency of 60 Hz. The gearing transmission system has been designed using the SolidWorks CAD software for modeling and simulation and the gearing design theory has been used to dimension the special drivetrain assembly of spur gears. The kinematic gearing theory has been used to establish the multitude of close consecutive discrete gearing ratios of the transmission system. A wind driven rotor model for the wind turbine power coefficient has been used to determine the power absorbed by the wind turbine from the blowing wind and the power delivered to the electricity generator. The wind turbine torque generated by the wind and the torque produced at the electricity generator have also been determined using the multitude of gear ratios of the designed drivetrain. A new control law is established to keep the wind turbine generator running at a quasi-constant speed while producing maximum power. Considering the QCVT with its numerous close and consecutive gear ratios as the main torque regulator, the wind turbine system is expected to deliver the right needed torque for a specified electrical load. A set of results featuring how the electricity generator power and torque can be controlled by shifting the ratios of drivetrain transmissions are delivered. A particular emphasis is put on maximizing the generator delivered power using controlled gear ratios while the speed of the wind is changing. A small scale prototype of the QCVT powertrain transmission has been designed and built for concept demonstration and testing purposes.
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Sreetharan, M., und F. Langenbacher. „Implementation Approaches to Sequencing in Microprocessor-Based Controllers“. In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-104.
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Traditional relay-based sequencing is increasingly being replaced by microprocessor-based programmable sequence controllers. Microprocessor-based sequencers are flexible, easy to use and eliminate the expensive reworking of hardwired logic each time a sequencing scheme is revised. However, the logical (bit-oriented) nature of the computations involved in implementing sequencing systems offer considerable challenge to the designers of microprocessor-based (byte/word oriented) sequencers to provide novel software and/or hardware architectures that are cost effective to implement and meet the speed requirements. This paper examines several possible implementation techniques of automatic digital sequencers. In particular, it describes the requirements and the design concepts that formed the basis of the sequencer implemented as part of a multi-processor based full authority controller at the authors’ company, that is capable of controlling a range of turbines in various applications. A comparative study of the performances of several existing sequencing systems is also presented.
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Gmelin, Christoph, Mathias Steger, Frank Thiele, Andre´ Huppertz und Marius Swoboda. „Unsteady RANS Simulations of a Highly Loaded Low Aspect Ratio Compressor Stator Cascade With Active Flow Control“. In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22516.
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A highly loaded compressor cascade is analyzed by means of time-resolved 3D RANS simulations. Due to the low aspect ratio of the cascade, strong three-dimensional effects emerge, such as large corner vortices and trailing edge separation at the midspan. The feasibility of the simulation using a commercial software and the applicability of controlling the separated regions using zero net mass flux synthetic jets is analyzed. The work includes two control concepts that are investigated separately. One aims to affect the secondary flow emerging from the sidewalls via actuation at the cascade casing walls. The other aims to reattach the separated flow to the blade suction side using an actuator on the blade. Beneficial flow control parameters characterizing a synthetic jet are determined for both locations by a systematic variation. Special attention is drawn to the global efficiency of the stator cascade by means of total pressure loss and pressure rise.