Relevant bibliographies by topics / DNC system

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'DNC system'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "DNC system"

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Wang, Min Jie, Y. J. Cai, and W. G. Yan. "Study on Key Technologies of DNC System Oriented Networked Manufacturing." Key Engineering Materials 291-292 (August 2005): 667–72. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.667.

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As one of major methods to meet information integration of numerical control machines in workshop, DNC (Direct Numerical Control or Distributed Numerical Control) oriented networked manufacturing (Web-DNC system) differs dramatically from conventional ones by having: (1) concurrently supporting networked manufacturing; (2) sharing the numerical control machines via network; (3) optimizing the configuration and reorganization of numerical control resources. This paper deals with the key technologies of Web-DNC system, including: the implementing architecture model with four layers (user layer, service layer, agent layer and facility layer) and the topology architecture. The BL2000 SCM is selected as a COM server to meet the required capabilities of DNC controller. Compared with the communication architecture with fieldbus, a simpler function model of DNC communication technology based on Ethernet technology is presented. A Web-DNC system prototype is developed and proved to be effective in information integration of numerical control machines in injecton workshop.
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Chen, Jing. "Application of DNC Communication System Based on Network Manufacturing Technology." Applied Mechanics and Materials 40-41 (November 2010): 682–85. http://dx.doi.org/10.4028/www.scientific.net/amm.40-41.682.

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DNC is referred to as the Direct Numerical Control, Intended for direct digital control. It means a number of numerical control equipment directly connected to a computer, and the central computer in charge of the NC program’s management and transfer. At present, DNC system includes not only the NC program, but also the manufacturing data of the specific tasks required for the production, such as cutting tools data, scheduling, configuration information of machine tools, and so on, and part of the DNC system also has the functions of machine tool state acquisition and remote control.
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Zhang, Sheng Fang, Chang Jun Ji, Zhi Hua Sha, and Chen Hao Ma. "Study on Key Technologies of Practical DNC System." Advanced Materials Research 139-141 (October 2010): 1184–87. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1184.

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Aim at the communication problems of computer and NC machine tool, a practical DNC system is developed in this paper. A three-layer control structure mode – which is composed by the unit layer, DNC computer workstation layer and NC system equipment layer – is presented. Based on its good real-time capability and high reliability, CAN field-bus is introduced into the DNC communication system construction, the network topology is constructed and related hardware is chosen properly. Using VC++6.0 as development tool, and assisted with special compiling tools LEX&YACC, 3D standard graphic library OpenGL and database Microsoft Access, and based on the multi-task and multi-thread technologies, the software of the system is developed. The system has the characteristics of reliable operation, simple structure and high real-time capability, can improve the efficiency of NC machining process obviously, and has a certain application prospect in the middle and small scale manufacturing enterprises of our country.
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Ni, Xiao Hong, and Zhen Qing Gao. "System Development in Integration of DNC-Based Manufacturing Information." Applied Mechanics and Materials 312 (February 2013): 464–68. http://dx.doi.org/10.4028/www.scientific.net/amm.312.464.

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DNC is a typical way of integrating manufacturing information. In order to provide information for managers and technicians, this paper firstly researches on manufacturing information integration model based on DNC, and then designs the architecture of the workshop network and the mode of information exchange through Ethernet on analysis of manufacturing information stream. It also presents a method of information acquisition from NC machine. Finally, the validity of the model and network is verified by implementation of the manufacturing information integration system.
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Huang, Song Bo, and Guang Rong Yan. "Research on Solution and Key Technologies of Network DNC for CNC Workshop." Advanced Materials Research 282-283 (July 2011): 670–74. http://dx.doi.org/10.4028/www.scientific.net/amr.282-283.670.

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In order to improve average utilization of CNC machine tools in CNC workshop, this paper presents a network DNC solution which involves basic tools, management tools, communication and monitor tools as well as integration tool. The key technologies such as the DNC system communicated with CNC machine tools, information collection and analysis for machine tools, document management and DNC system integrated with other application system, etc. are introduced in this paper. The technologies and solution are verified in a missile institute, and the production efficiency and the production management are enhanced significantly in this institute.
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Fazliana Fadzail, Noor, Samila Mat Zali, Arizadayana Zahalan, and Mohd Alif Ismail. "Parameter Estimation for Dynamic Model of Distribution Network Cell (DNC) Using Fuzzy System." Applied Mechanics and Materials 793 (September 2015): 489–93. http://dx.doi.org/10.4028/www.scientific.net/amm.793.489.

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The aim of this project is to develop parameter estimation for dynamic model of distribution network cell (DNC) using fuzzy system. The parameter value was updated through adaptive neuro-fuzzy inference system (ANFIS). The active and reactive power responses from the fuzzy model were compared with the response from the full DNC model at various types of disturbances. The response of full DNC model was obtained from the UK 11 kV distribution network model. The model was built in DigSILENT PowerFactory software. The results obtained shown that the fuzzy model was more simple as only a few parameters involved in developing the equivalent model. This simplicity was reflected in the low computational time. In conclusion, the parameter estimation using fuzzy system was successfully developed.
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Fan, Tao, Chang-Zhong Chen, Xiao-Hong Ren, and Ping He. "Adaptive Synchronization of Delayed Chen Chaotic System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 3, no. 4 (December 2014): 367–78. http://dx.doi.org/10.5890/dnc.2014.12.001.

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Zhuang, Dian Zheng, and Yu Hua Zhu. "Research on Network NC Manufacturing Based on Internet." Applied Mechanics and Materials 441 (December 2013): 947–50. http://dx.doi.org/10.4028/www.scientific.net/amm.441.947.

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The paper introduced the method and technology of how to implement a Integrated Manufacturing, each CNC machining equipment is equipped with a special communication unit, each communication unit are directly connected with the DNC main control computers on the Internet, effect of special communication unit is mainly data buffer and protocol conversion, the TCP/IP protocol is used between communication unit and DNC main control Internet computer, and used serial communication protocol communication between communication unit and NC equipment. Using this technology, all kinds of CNC machining equipment and DNC system can be easily with the CAD/CAM/CAE system, digital profile measurement system, fault diagnosis and error compensation of intelligent system integration, providing good technical conditions for further information of various advanced manufacturing environment integration.
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Yudianto, Yudianto. "AN OVERVIEW OF DIRECT OR DISTRIBUTED NUMERICAL CONTROL IN COMPUTER NUMERICAL CONTROL APPLICATIONS." Journal of Mechanical Science and Engineering 7, no. 2 (January 23, 2021): 025–29. http://dx.doi.org/10.36706/jmse.v7i2.38.

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Direct numerical control is also known as distributed numerical control (also abbreviated DNC), is a common manufacturing term for networking CNC machine tools. On some CNC machine controllers, the available memory is too small to contain the machining program (for example machining complex surfaces), so in this case the program is stored in a separate computer and sent directly to the machine, one block at a time. If the computer is connected to a number of machines it can distribute programs to different machines as required. Usually, the manufacturer of the control provides suitable DNC software. However, if this provision is not possible, some software companies provide DNC applications that fulfill the purpose. DNC networking or DNC communication is always required when Computer-Aided Manufacturing (CAM) programs are to run on some CNC machine control. Wireless DNC is also used in place of hard-wired versions. Controls of this type are very widely used in industries with significant sheet metal fabrication, such as the automotive, appliance, and aerospace industries. A DNC system has to fulfill two basic tasks such as first guaranteeing secure, timely data transfer from and to the CNC controllers, secondly administering many thousands of NC programs.
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Li, Xihao. "Standardization of Agent-based Modeling in Economic System." Interdisciplinary journal of Discontinuity, Nonlinearity, and Complexity 3, no. 3 (September 2014): 293–302. http://dx.doi.org/10.5890/dnc.2014.09.006.

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Dissertations / Theses on the topic "DNC system"

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Dang, Thien Ngon. "Agentenbasierter Programmassistent zur Verwaltung von NC-Informationen in Produktionssystemen mit Kommunikationsnetzwerken." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1209564075388-09943.

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In den letzten Jahren hat sich die rapide Entwicklung der Elektrotechnik ebenso wie die der Softwaretechnologie auf die numerischen Steuerungen in den heutigen CNC-Maschinen groß ausgewirkt. Diese numerischen Steuerungen sind sowohl intelligenter und flexibler als auch mit größerer Internspeicherkapazität ausgerüstet. Dies führt zu einer Änderung der Art und Weise, wie DNC-Systeme zu etablieren sind, besonders solcher, die auf bisher verfügbaren, aber ungleichartigen DNC-Systemen basieren. In einem solch heterogenen DNC-System wird Datenspeicherungsfähigkeit stärker verteilt angeordnet, d.h., sie ist nicht nur in einem zentralen DNC-Server vorhanden, sondern auch in Terminals oder Steuerungen selbst angelagert. Diese Änderung des Archivierungsmittels benötigt neue DNC-Software, die die DNC-Grundfunktionen voll realisiert. Zudem sollte sie auch den neuen spezifischen Softwareanforderungen entsprechen und erlauben, neue Funktionen, z.B. Maschinendatenerfassung, Betriebsdatenerfassung usw., als Module hinzuzufügen. Derzeit wird die Agententechnologie bzw. ein MAS (Multiagentensystem) als ein aussichtsreicher Ansatz angesehen, um die Probleme der heutigen komplexen Softwaresysteme, wie ungleichartige Systemumgebungen und verteilte Strukturen, zu lösen. Die vorliegende Arbeit stellt die Idee zum Aufbau eines heterogenen DNC-Systems und die Konzipierung zur Gestaltung der agentenbasierten DNC-Software vor. Ausgehend von dem vorgestellten Lösungskonzept wird zudem der Programmassistent als erster Modul der agentenbasierten DNC-Software präsentiert
In the network-based DNC systems and especially heterogeneous DNC systems data get more distributed due to the ability to store not only in the DNC Server but also in the CNC controller or CNC Terminal. This leads a challenge to the DNC software in the implementation of its basic functions. The agent-based DNC software with assistants (ADNC) is suggested to solve the above problem. Its tasks are to collect distributed NC information and transfer data safely as well as performing other extended functions, i.e. NC program generation, machine data collection, production data collection, control machines in system, etc. The present work presented the concept to develop the ADNC and its first prototype. This prototype was developed in a process using a framework of agent-based assistants, called AgentAP. It is applicable on distributed manufacturing data and had been implemented on the agent platform JADE. The module Program Assistant, one of these prototype modules, which is responsible for management, bidirectional transfer, and monitoring change of NC programs, is also discussed
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Werner, Matthias. "Verteilte Mobilität - Eine spannende Herausforderung." Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-78213.

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Cyber-physikalische Systeme (CPS) sind eine erweitere Sicht auf eingebettete Systeme, die die konkreten umgebenden Elemente in das Systemdesign einbeziehen. Das Design solcher Systeme erfordert neue Herangehensweisen: Während beispielsweise in "normalen" verteilten Systemen Aspekte wie "Bewegung" oder "Ort" möglichst transparent und damit für den Nutzer unsichtbar gestaltet werden, benötigen CPS-Anwendungen häufig Bewusstsein für Bewegung oder Ort, d.h., sie sind _motion aware_ oder _location aware_. Die Professur "Betriebssysteme" der TUC hat sich die Frage gestellt, wie eine generische Unterstützung für solche verteilte mobile Systeme aussehen könnte. Im Vortrag werden Probleme, Konzepte und erste Lösungsansätze für ein künftiges Betriebssystem für diese Art von Systemen vorgestellt.
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Markert, Erik, Hailu Wang, Göran Herrmann, and Ulrich Heinkel. "Kostenmodellierung mit SystemC/System-AMS." Universitätsbibliothek Chemnitz, 2007. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200700902.

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In diesem Beitrag wird eine Methode zur Beschreibung von Kostenfaktoren und deren Verknüpfung über Hierarchiegrenzen hinweg dargestellt. Sie eignet sich sowohl für rein digitale Systeme mit Softwareanteilen als auch für gemischt analog/digitale Systeme. Damit ist sie im Hardware-Software Codesign und im Analog-Digital Codesign zum Vergleich verschiedener Systemkompositionen anwendbar. Die Implementierung mit C++ ermöglicht neben einer Nutzung mit digitalem SystemC auch den Einsatz mit der analogen SystemC-Erweiterung SystemC-AMS und vereinfacht die Nutzung gegenüber einer vorhandenen VHDL-Implementierung. Als Anwendungsbeispiel fungieren Komponenten eines Systems zur Inertialnavigation.
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Ong, Cher Howe. "The effects of terrain on a system of systems." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://edocs.nps.edu/npspubs/scholarly/theses/2008/Dec/08Dec%5FOng_Cher.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2008.
Thesis Advisor(s): Lucas, Thomas W. "December 2008." Description based on title screen as viewed on January 28, 2009. Includes bibliographical references (p. 109-110). Also available in print.
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Vodel, Matthias. "Energieeffiziente Kommunikation in verteilten, eingebetteten Systemen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-131891.

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Verteilte, Eingebettete Systeme beeinflussen unser tägliches Leben in unzähligen Bereichen. Getrieben durch technologische Weiterentwicklungen und neue Nutzungsprofile nimmt der Vernetzungsgrad elektronischer Geräte rapide zu. Neben einem ausgeprägten Netzwerkcharakter sind aktuelle und zukünftige Anwendungsszenarien wesentlich durch einen hohen Mobilitätsgrad geprägt. Daraus ergeben sich zunehmend Problemstellungen bzgl. geeigneter Kommunikationskonzepte und der hierfür benötigten Energieressourcen. Dieses Buch befasst sich mit Technologien, Konzepten und Protokollen zur energieeffizienten Kommunikation in verteilten, ressourcenbeschränkten Systemen. Es definiert grundlegende Begrifflichkeiten und vermittelt einen umfassenden Einblick in die verschiedenen Forschungsschwerpunkte. Relevante, technologische Entwicklungen der beiden letzten Dekaden werden vorgestellt, thematisch eingeordnet und kritisch analysiert. Anschließend erfolgt die funktional getrennte Betrachtung von Kommunikationsprozessen auf Netzwerk-, Daten- sowie Energiemanagementebene. Darauf aufbauend widmet sich das Buch der Systemintegration und damit einhergehend dem komplexen Systemkonfigurationsprozess. Unter Berücksichtigung applikationsspezifischer Rahmenbedingungen sowie funktionaler Anforderungen werden gezielt geeignete Optimierungsstrategien ausgewählt und in einer ganzheitlich angepassten Systemarchitektur kombiniert. Erst durch das präzise Zusammenspiel von Kommunikationsparadigma, Kommunikationstechnologien und Kommunikationsprotokollen entsteht ein optimiertes Gesamtsystem, welches die zur Verfügung stehenden Ressourcen effizient nutzt. Zur Bewertung kommt ein neu entwickeltes, erweitertes Quantifizierungsmodell zum Einsatz, welches die kommunikativen Aspekte verteilter Applikationsszenarien vollständig einbezieht. Im Rahmen umfangreicher Fallstudien werden ausgewählte Optimierungsverfahren simulativ sowie auf Basis unterschiedlicher Hardwareplattformen evaluiert. Aus den Ergebnissen resultieren qualitative und quantitative Rückschlüsse auf das mögliche Optimierungspotential unter realen Einsatzbedingungen. Die gewonnenen Erkenntnisse dienen als wichtige Richtgrößen für zukünftige Entwicklungen im Bereich eingebetteter, ressourcenbeschränkter Kommunikationssysteme
Embedded systems are used in almost every domain of our daily lives. Actual research and development activities focus on wireless connected and mobile system architectures. The resulting network topologies represent embedded, distributed systems, which are able to process complex tasks in a collaborative way. Most of the respective hardware platforms are energy self-sufficient with strongly limited resources for data processing, data storage and communication. With focus on the energy resources, communication tasks have a huge impact on the systems power consumption. In order to optimise the energy efficiency of these communication tasks, one key challenge for engineers is the application-specific integration of adapted communication concepts, radio technologies, and protocol stacks into an all-embracing communication architecture. This book critically discusses energy efficiency in distributed, embedded systems with focus on the communication aspects. The first part introduces basic definitions as well as a novel estimation model for quantifying energy efficiency on both local (system) and global (network) layer. In the second part, this book proposes several optimisation approaches for energy-efficient, resource-limited communication systems. This include hardware approaches as well as software approaches to optimise the runtime environment and the data processing tasks. Each approach operates on different abstraction layers within the system architecture. The last part of the book deals with the evaluation of specific optimisation strategies under real-world conditions. The test cases includes simulation scenarios as well as hardware test benches within a heterogeneous network environment. The respective results and analyses represent important guidelines for future developments in field of distributed, embedded communication platforms
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Vodel, Matthias. "Energieeffiziente Kommunikation in verteilten, eingebetteten Systemen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-133410.

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Verteilte, Eingebettete Systeme beeinflussen unser tägliches Leben in unzähligen Bereichen. Getrieben durch technologische Weiterentwicklungen und neue Nutzungsprofile nimmt der Vernetzungsgrad elektronischer Geräte rapide zu. Neben einem ausgeprägten Netzwerkcharakter sind aktuelle und zukünftige Anwendungsszenarien wesentlich durch einen hohen Mobilitätsgrad geprägt. Daraus ergeben sich zunehmend Problemstellungen bzgl. geeigneter Kommunikationskonzepte und der hierfür benötigten Energieressourcen. Dieses Buch befasst sich mit Technologien, Konzepten und Protokollen zur energieeffizienten Kommunikation in verteilten, ressourcenbeschränkten Systemen. Es definiert grundlegende Begrifflichkeiten und vermittelt einen umfassenden Einblick in die verschiedenen Forschungsschwerpunkte. Relevante, technologische Entwicklungen der beiden letzten Dekaden werden vorgestellt, thematisch eingeordnet und kritisch analysiert. Anschließend erfolgt die funktional getrennte Betrachtung von Kommunikationsprozessen auf Netzwerk-, Daten- sowie Energiemanagementebene. Darauf aufbauend widmet sich das Buch der Systemintegration und damit einhergehend dem komplexen Systemkonfigurationsprozess. Unter Berücksichtigung applikationsspezifischer Rahmenbedingungen sowie funktionaler Anforderungen werden gezielt geeignete Optimierungsstrategien ausgewählt und in einer ganzheitlich angepassten Systemarchitektur kombiniert. Erst durch das präzise Zusammenspiel von Kommunikationsparadigma, Kommunikationstechnologien und Kommunikationsprotokollen entsteht ein optimiertes Gesamtsystem, welches die zur Verfügung stehenden Ressourcen effizient nutzt. Zur Bewertung kommt ein neu entwickeltes, erweitertes Quantifizierungsmodell zum Einsatz, welches die kommunikativen Aspekte verteilter Applikationsszenarien vollständig einbezieht. Im Rahmen umfangreicher Fallstudien werden ausgewählte Optimierungsverfahren simulativ sowie auf Basis unterschiedlicher Hardwareplattformen evaluiert. Aus den Ergebnissen resultieren qualitative und quantitative Rückschlüsse auf das mögliche Optimierungspotential unter realen Einsatzbedingungen. Die gewonnenen Erkenntnisse dienen als wichtige Richtgrößen für zukünftige Entwicklungen im Bereich eingebetteter, ressourcenbeschränkter Kommunikationssysteme
Embedded systems are used in almost every domain of our daily lives. Actual research and development activities focus on wireless connected and mobile system architectures. The resulting network topologies represent embedded, distributed systems, which are able to process complex tasks in a collaborative way. Most of the respective hardware platforms are energy self-sufficient with strongly limited resources for data processing, data storage and communication. With focus on the energy resources, communication tasks have a huge impact on the systems power consumption. In order to optimise the energy efficiency of these communication tasks, one key challenge for engineers is the application-specific integration of adapted communication concepts, radio technologies, and protocol stacks into an all-embracing communication architecture. This book critically discusses energy efficiency in distributed, embedded systems with focus on the communication aspects. The first part introduces basic definitions as well as a novel estimation model for quantifying energy efficiency on both local (system) and global (network) layer. In the second part, this book proposes several optimisation approaches for energy-efficient, resource-limited communication systems. This include hardware approaches as well as software approaches to optimise the runtime environment and the data processing tasks. Each approach operates on different abstraction layers within the system architecture. The last part of the book deals with the evaluation of specific optimisation strategies under real-world conditions. The test cases includes simulation scenarios as well as hardware test benches within a heterogeneous network environment. The respective results and analyses represent important guidelines for future developments in field of distributed, embedded communication platforms
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Vrtílek, Michal. "Nástroje pro správu centrálních registrů DNS." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237116.

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This master's thesis deals with domain registration and related registration systems administrators domains. The main focus is on domain registration via registrars, which is connected with an interface for the registrars registration systems. A part of the interface for the registrars is EPP communication protocol, which is in the project described in detail. Furthermore, there is an overview of freely available registration systems. After this overview, the work focuses more on the czech registration system FRED, specifically the section solving communication with the registrars. A part of is a little research conducted among the registrars aimed at their solving access to the registration system. To facilitate this approach, this work focuses on the implementation of the client library that shield programmers from the details of the communication protocol between the registrar and the registration system and provides an interface for easy implementation of client for the FRED system.
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Katzenbach, Alfred, and Peyman Merat. "Methodik zum Austausch eines CAD Systems in einem Großunternehmen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-228005.

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Nach einem 10 bis 15 Jahre dauernden Lebenszyklus besteht die Notwendigkeit große IT-Systeme durch eine neue Generation zu ersetzen. Dabei ist es vom Aufwand her unwesentlich, ob es sich um einen Generationswechsel des gleichen Herstellers handelt oder um die vergleichbare Lösung eines anderen Herstellers. Im beschriebenen Fall hat sich die Daimler AG im November 2010 entschieden auf ein anderes CAD-System zu wechseln und die Migration bis Ende 2016 abzuschließen. Der Beitrag zeigt die Vorgehensweise der Umstellung unter fünf Aspekten: — Anwendungsmethodik inkl. Datenarchivierung — Datenmigration — Use-Case-Absicherung — Rolloutplanung — Schulungskonzept
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Kriesten, Daniel. "Systementwurf eingebetteter heterogener rekonfigurierbarer Systeme mit Linux-Betriebssystem am Beispiel einer modularen Plattform zur Erfassung und Verarbeitung von Sensordaten." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-154966.

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Ausgehend von einer modularen Plattform zur Erfassung und Verarbeitung von Sensordaten bereichert die vorliegende Dissertationsschrift den Systementwurf eingebetteter Systeme um neue Facetten. Ihr besonderer Fokus liegt dabei auf rekonfigurierbaren Architekturen und Linux-basierten Systemen. Ein wesentlicher Beitrag ist die Darstellung und Diskussion von Konzepten und Architekturen vorgenannter Systeme durch ihre Betrachtung auf einer hohen Abstraktionsebene. Dazu schafft die Arbeit ein umfassendes Verständnis für Kommunikation und Konfiguration in heterogenen rekonfigurierbaren Systemen und überträgt die Erkenntnisse auf das Linux-Betriebssystem. Es erfolgt außerdem eine systematische Darstellung der etablierten Zusammenhänge und Abläufe beim Software-, Paket- und Versionsmanagement im Linux-Umfeld. Zur Verbesserung des Entwurfsflusses werden Konzepte und ein geeignetes Werkzeug zur High-Level Spezifikation von Linux-Systemen dargestellt. Die in der Arbeit gewonnenen wissenschaftlichen Erkenntnisse werden hinsichtlich praktischer Relevanz evaluiert und durch prototypische Implementierungen verifiziert
Based on a modular platform for recording and processing of sensor data the present thesis enriches the field of system design of embedded systems with new facets. Its particular focus is on reconfigurable architectures and Linux-based systems. A major contribution is the presentation and discussion of concepts and architectures of aforementioned systems by investigating them on a high level of abstraction. To achieve this, the work creates a comprehensive understanding of communication and configuration in heterogeneous reconfigurable systems. This knowledge is transferred on the Linux operating system. In addition, a systematic presentation of the established relationships and processes in software, package and version management in the Linux environment takes place. To improve the design flow of Linux systems, the thesis presents appropriate concepts as well as a tool for high-level specification of embedded Linux systems. The gained scientific findings are evaluated in terms of practical relevance and verified by prototype implementations
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Boroudjerdi, Hoda. "Charged polymer-macroion complexes." Phd thesis, Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2006/628/.

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This work explores the equilibrium structure and thermodynamic phase behavior of complexes formed by charged polymer chains (polyelectrolytes) and oppositely charged spheres (macroions). Polyelectrolyte-macroion complexes form a common pattern in soft-matter physics, chemistry and biology, and enter in numerous technological applications as well. From a fundamental point of view, such complexes are interesting in that they combine the subtle interplay between electrostatic interactions and elastic as well as entropic effects due to conformational changes of the polymer chain, giving rise to a wide range of structural properties. This forms the central theme of theoretical studies presented in this thesis, which concentrate on a number of different problems involving strongly coupled complexes, i.e. complexes that are characterized by a large adsorption energy and small chain fluctuations.

In the first part, a global analysis of the structural phase behavior of a single polyelectrolyte-macroion complex is presented based on a dimensionless representation, yielding results that cover a wide range of realistic system parameters. Emphasize is made on the interplay between the effects due to the polyelectrolytes chain length, salt concentration and the macroion charge as well as the mechanical chain persistence length. The results are summarized into generic phase diagrams characterizing the wrapping-dewrapping behavior of a polyelectrolyte chain on a macroion. A fully wrapped chain state is typically obtained at intermediate salt concentrations and chain lengths, where the amount of polyelectrolyte charge adsorbed on the macroion typically exceeds the bare macroion charge leading thus to a highly overcharged complex.

Perhaps the most striking features occur when a single long polyelectrolyte chain is complexed with many oppositely charged spheres. In biology, such complexes form between DNA (which carries the cell's genetic information) and small oppositely charged histone proteins serving as an efficient mechanism for packing a huge amount of DNA into the micron-size cell nucleus in eucaryotic cells. The resultant complex fiber, known as the chromatin fiber, appears with a diameter of 30~nm under physiological conditions. Recent experiments indicate a zig-zag spatial arrangement for individual DNA-histone complexes (nucleosome core particles) along the chromatin fiber. A numerical method is introduced in this thesis based on a simple generic chain-sphere cell model that enables one to investigate the mechanism of fiber formation on a systematic level by incorporating electrostatic and elastic contributions. As will be shown, stable complex fibers exhibit an impressive variety of structures including zig-zag, solenoidal and beads-on-a-string patterns, depending on system parameters such as salt concentration, sphere charge as well as the chain contour length (per sphere). The present results predict fibers of compact zig-zag structure within the physiologically relevant regime with a diameter of about 30~nm, when DNA-histone parameters are adopted.

In the next part, a numerical method is developed in order to investigate the role of thermal fluctuations on the structure and thermodynamic phase behavior of polyelectrolyte-macroion complexes. This is based on a saddle-point approximation, which allows to describe the experimentally observed reaction (or complexation) equilibrium in a dilute solution of polyelectrolytes and macroions on a systematic level. This equilibrium is determined by the entropy loss a single polyelectrolyte chain suffers as it binds to an oppositely charged macroion. This latter quantity can be calculated from the spectrum of polyelectrolyte fluctuations around a macroion, which is determined by means of a normal-mode analysis. Thereby, a stability phase diagram is obtained, which exhibits qualitative agreement with experimental findings.

At elevated complex concentrations, one needs to account for the inter-complex interactions as well. It will be shown that at small separations, complexes undergo structural changes in such a way that positive patches from one complex match up with negative patches on the other. Furthermore, one of the polyelectrolyte chains may bridge between the two complexes. These mechanisms lead to a strong inter-complex attraction. As a result, the second virial coefficient associated with the inter-complex interaction becomes negative at intermediate salt concentrations in qualitative agreement with recent experiments on solutions of nucleosome core particles.
In dieser Arbeit werden Gleichgewichtsstrukturen und die thermodynamischen Phasen von Komplexen aus geladenen Polymeren (Polyelektrolyten) und entgegengesetzt geladenen Kugeln (Makroionen) untersucht. Polyelektrolyt-Makroion-Komplexe bilden ein grundlegendes und wiederkehrendes Prinzip in der Physik weicher Materie sowie in Chemie und Biologie. In zahlreichen technologischen Prozessen finden sich ebenfalls Anwendungsbeispiele für derartige Komplexe. Zusätzlich zu ihrem häufigen Auftreten sind sie aufgrund ihrer Vielfalt von strukturellen Eigenschaften von grundlegendem Interesse. Diese Vielfalt wird durch ein Zusammenspiel von elektrostatischen Wechselwirkungen sowie elastischen und entropischen Effekten aufgrund von Konformationsänderungen in der Polymerkette bedingt und bildet das zentrale Thema der theoretischen Studien, die mit dieser Arbeit vorgelegt werden. Verschiedene Strukturen und Prozesse, die stark gekoppelte Komplexe beinhalten - das sind solche, für die eine hohe Adsorptionsenergie und geringe Fluktuationen in den Polymerketten charakteristisch sind -, bilden das Hauptthema der Arbeit.

Basierend auf einer dimensionslosen Darstellung wird im ersten Teil der Arbeit in einer umfassenden Analyse das strukturelle Phasenverhalten einzelner Polyelektrolyt-Makroion-Komplexe behandelt. Der Schwerpunkt wird hier auf das Wechselspiel zwischen Effekten aufgrund der Polyelektrolytkettenlänge, ihrer mechanischen Persistenzlänge, der Salzkonzentration und der Ladung des Makroions gelegt. Die Ergebnisse werden in allgemeinen Phasendiagrammen zusammengestellt, das das Aufwickeln-Abwickeln-Verhalten der Polyelektrolytkette auf einem Makroion beschreibt. Ein Zustand mit komplett aufgewickelter Kette tritt typischerweise bei mittleren Salzkonzentrationen und Kettenlängen auf; häufig ist hier die auf dem Makroion adsorbierte Gesamtladung des Polyelektrolyts größ er als die Ladung des nackten Makroions, d.h. es findet in hohem Grad Ladungsinversion statt.

Äußerst bemerkenswerte Eigenschaften treten auf, wenn eine einzelne lange Polyelektrolytkette viele, ihr entgegengesetzt geladene Kugeln komplexiert. In biologischen Systemen findet man solche Komplexe zwischen DNS, die die genetische Information einer Zelle trägt, und kleinen, entgegengesetzt geladenen Histonproteinen. Diese Komplexe dienen als effizienter Mechanismus, die groß e Menge an DNS im Mikrometer-groß en Zellkern eukaryotischer Zellen zu komprimieren. Die dadurch erhaltene komplexe Faser, eine Chromatinfaser, hat unter physiologischen Bedingungen einen Durchmesser von nur etwa 30~nm. Neue Experimente haben gezeigt, dass eine räumliche Zickzack-Anordnung einzelner DNA-Histon-Komplexe entlang der Chromatinfaser vorliegt. In der hier vorgelegten Arbeit wird eine numerische Methode vorgestellt, die auf einem einfachen Ketten-Kugel-Zell-Modell basiert und die die systematische Untersuchung des Mechnismus zur Faserbildung ermöglicht, wobei sowohl elektrostatische als auch elastische Wechselwirkungen berücksichtigt werden. Es wird gezeigt, dass stabile Komplexfasern in Abhängigkeit von der Salzkonzentration, der Kugelladung und der Kettenkonturlänge eine Vielfalt von Strukturen aufweisen, darunter Zickzack-, Solenoid- und Perlenkettenformen. Für physiologisch relevante Bedingungen werden mit dieser Methode für DNA-Histon-Komplexe Fasern kompakter Zickzack-Struktur mit einem Durchmesser von etwa 30~nm erhalten.

Im folgenden Teil wird eine numerische Methode entwickelt, um den Einfluss thermischer Fluktuationen auf Struktur und thermodynamisches Phasenverhalten der Polyelektrolyt-Makroion-Komplexe zu untersuchen. Basierend auf der Sattelpunktsnäherung werden die experimentell beobachteten Reaktionsgleichgewichte in verdünnten Lösungen von Polyelektrolyten und Makroionen systematisch beschrieben. Das Gleichgewicht ist durch einen Verlust an Entropie für die einzelne Polyelektrolytkette durch die Bindung an das entgegengesetzt geladene Makroion gekennzeichnet. Diese Größ e wurde aus dem Spektrum der Polyelektrolytfluktuationen um das Makroion erhalten und mittels einer Analyse der Normalmoden berechnet. Hierüber wird ein Phasendiagramm zur Stabilität der Komplexe erhalten, das qualitativ gute Übereinstimmungen mit experimentellen Ergebnissen aufweist.

Bei höheren Komplexkonzentrationen müssen auch die Wechselwirkungen zwischen den Komplexen berücksichtigt werden. Es wird gezeigt, dass sich die Struktur der Komplexe bei kleinen Abständen so ändert, dass positiv geladene Bereiche eines Komplexes mit negativ geladenen auf einem Nachbarkomplex räumlich korrelieren. Weiterhin können einzelne Polyelektrolytketten als verbrückendes Element zwischen zwei Komplexen dienen. Dieser Mechanismus führt zu starker effektiver Anziehung zwischen den Komplexen. In Übereinstimmung mit kürzlich durchgeführten Experimenten ist als Folge davon der zweite Virialkoeffizient der Wechselwirkung zwischen Komplexen bei mittleren Salzkonzentrationen negativ.
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Books on the topic "DNC system"

1

Maniatis, Tom. A DNA operator-repressor system. [Preston: Lancashire Polytechnic, 1988.

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Efficient DDC systems implementation. Radnor, Pa: Chilton Book Co., 1996.

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Investigation, New York (State) Temporary Commission of. DNA and the criminal justice system. New York, N.Y: New York State Commission of Investigation, 2006.

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Liu, Cricket. Understanding the Domain Name System (DNS). Sebastopol, CA: O'Reilly & Associates, Inc., 1998.

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Foreign DNA in mammalian systems. Weinheim: Wiley-VCH, 2000.

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Fishman, George S. Dna repair protocols: Prokaryotic systems. [Place of publication not identified]: Humana, 2010.

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Neuroviral infections: General principles and DNA viruses. Boca Raton: CRC Press/Taylor & Francis, 2013.

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Yu, Ho-jin. Pyŏnhyŏng yujŏnja ŏkche sisŭtʻem yŏnʼgu =: The study for the protective system of the DNA adduct. [Seoul]: Pogŏn Pokchibu, 2007.

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Corporation, Digital Equipment. DEC C: User's guide for OpenVMS systems. Maynard, MA: Digital Equipment Corporation, 1994.

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Corporation, Digital Equipment. DEC Fortran: User manual for OpenVMS systems. Maynard, MA: Digital Equipment Corporation, 1992.

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Book chapters on the topic "DNC system"

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Wang, M. J., Y. J. Cai, and W. G. Yan. "Study on Key Technologies of DNC System Oriented Networked Manufacturing." In Advances in Abrasive Technology VIII, 667–72. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-974-1.667.

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Păun, Gheorghe, Grzegorz Rozenberg, and Arto Salomaa. "Sticker Systems." In DNA Computing, 117–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03563-4_5.

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Păun, Gheorghe, Grzegorz Rozenberg, and Arto Salomaa. "Splicing Systems." In DNA Computing, 217–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03563-4_8.

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Păun, Gheorghe, Grzegorz Rozenberg, and Arto Salomaa. "Distributed H Systems." In DNA Computing, 319–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03563-4_11.

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Păun, Gheorghe, Grzegorz Rozenberg, and Arto Salomaa. "Insertion-Deletion Systems." In DNA Computing, 187–215. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03563-4_7.

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Frisco, Pierluigi, and Sungchul Ji. "Conformons-P Systems." In DNA Computing, 291–301. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-36440-4_26.

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Nardone, Mary S. "DDC System Commissioning." In Direct Digital Control Systems, 137–60. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4923-9_9.

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Alhazov, Artiom, and Matteo Cavaliere. "Computing by Observing Bio-systems: The Case of Sticker Systems." In DNA Computing, 1–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11493785_1.

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Krishna, Shankara Narayanan, and Raghavan Rama. "Insertion-Deletion P Systems." In DNA Computing, 360–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-48017-x_34.

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Rose, John A., Russell J. Deaton, Masami Hagiya, and Akira Suyama. "The Fidelity of the Tag-Antitag System." In DNA Computing, 138–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-48017-x_13.

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Conference papers on the topic "DNC system"

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Li Boquan, Pan Haibin, Wang Xiaofei, and Tian Hongsheng. "Study and implementation of WLAN network in DNC system." In 2010 International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2010. http://dx.doi.org/10.1109/mace.2010.5535532.

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Kang, Donghyun, and Minho Lee. "Seq-DNC-seq: Context Aware Dialog Generation System Through External Memory." In 2019 International Joint Conference on Neural Networks (IJCNN). IEEE, 2019. http://dx.doi.org/10.1109/ijcnn.2019.8851737.

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Jian, Zhenghao, and Jinhong Zou. "Design and Implementation of Networked CNC Machine DNC System in Colleges and Universities Based on Internet Plus." In 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/icmmcce-17.2017.52.

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Franco, P., M. Estrems, and F. Faura. "DNC Method for Flatness Reduction by Machine Tool Error Compensation in Planning Processes." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95528.

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Milling is a widely used manufacturing process with the main purpose of generating high precision mechanical components of shapes and sizes given by the numerical control programmed cutting tool trajectory. These mechanical components frequently needs the application of milling operations in order to satisfy the technical specifications that corresponds to their dimensional, geometrical and surface quality requirements. For that reason, the effects of different factors such as cutting tool dynamics, fixturing system design, workpiece material behaviour and applied cutting forces on the desired dimensional precision must be studied, as well as cutting tool and machine tool performance. In this work, the relation between machine tool inaccuracies and geometrical tolerances is analyzed, and a methodology is proposed for improving flatness in planing operations by the correction of imperfections detected in cutting tool displacement according to machine tool axis. These machine tool error correction methodology could be implemented in the current CAD/CAM/CAPP techniques as a means of increasing the milling process performance by identification and correction of CNC milling machine imperfections. The deviations in machine tool displacement during cutting process are identified by metrological analysis, and a modified trajectory for cutting tool is defined by direct numerical control (DNC) from systematic error compensation in machine tool.
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Zhiqiang, Zhao, Chua Wei Quan, Ding Xiaoming, and Prabhu Vinayak Ashok. "Smart Factory of Industry 4.0: Connection Infrastructure, Data Acquisition, Data Processing, and Applications." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2703.

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Abstract Smart factory adopts cyber-physical technologies integrating independent discrete systems into a context-sensitive manufacturing environment to optimize manufacturing processes using decentralized information and real-time communication. This paper presents our work in the realization of a smart factory, which comprises of a four-layer hierarchical architecture, i.e. connection infrastructure, data acquisition, data processing and smart applications. In the connection infrastructure layer, all shopfloor machines are connected through diverse protocols, IoT sensors, PLC interfaces and DNC connectors. A centralized IoT gateway supports such a scalable and adaptable connection and ensures a reliable communication among all heterogeneous manufacturing systems. In the data acquisition layer, the real-time machine and job data are acquired from shopfloor systems. Machine data indicates machines’ working condition and job data reveals the production information. The data processing layer comprises of three modules, i.e. shopfloor monitoring, data visualization and data analytics, which monitor and visualize shopfloor activities and analyze the semantics of various data using AI-based TPM engines providing the scientific indicators for next-step decisions. The smart application layer provides with several decision-making and remote control functions for shopfloor productivity and efficiency, such as predictive maintenance, shopfloor management, machine & job optimization and digital twin. The smart factory system has been implemented in the manufacturing shopfloor at Nanyang Polytechnic. The results and validation show that the system can simultaneously collect and analyze the manufacturing data from shopfloor systems, and further communicate with and control the shopfloor systems with decision-support functions. The overall shopfloor efficiency and flexibility can be significantly improved towards a smart factory of Industry 4.0.
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Tang, Hui, Ai-cheng Gong, and Feng Zhu. "Study on Modifications of CPR1000 Nuclear Plants for Design Extension Conditions." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16702.

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Traditional design of CPR1000 nuclear plants has a lot of studies on engineering safety facilities which are important for Design Basis Conditions (DBC). Based on more recent studies on safety, such as Defense in Depth (DID) concept, Probabilistic Safety Analysis (PSA), and especially after lessons from Fukushima Nuclear Accident, more and more attentions are paid to Design Extension Conditions (DEC). This paper has studied the abilities and requirements of CPR1000 Nuclear Plants for DEC accidents mitigation. Some important modifications on mechanical systems are introduced. DEC accidents are separated into DEC-A, and DEC-B. DEC-A accidents are caused by multiple failures. A main reason for a multiple failure is Common Cause Failure (CCF), such as CCF on Emergency Feed Water System (EFWS) pumps, Emergency Core Cooling System (ECCS) pumps, Emergency Diesel Generators or Cooling chain. Diverse design should be considered to deal with CCF. Several modifications are applied, such as enhancing EFWS turbine pumps, fast-backup between ECCS and Containment Spray System (CSS), mobile water makeup and mobile injection for primary and secondary side, etc. For DEC-B, which means severe accidents, several dedicated systems are added to CPR1000 design, such as hydrogen monitor and control, containment venting filter and In-Vessel Retention systems. Thanks to all the modifications, CPR1000 can sufficiently improve its defense for DEC accidents, which will help CPR1000 to reach a new safety level.
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Li, Leslie, Richard Burton, and Greg Schoenau. "Feasibility Study on the Use of Dynamic Neural Networks (DNN’s) for Modeling a Variable Displacement Load Sensing Pump." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15588.

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The feasibility of using a particular form of neural networks, defined as Dynamic Neural Units (DNU's), to model a pump in a load sensing system is investigated in this paper. Because of the highly complex structure of the pump, its compensators and controlling elements, simulation of load-sensing pump systems pose many challenges to researchers. Several models of pumps, compensators and valves have been developed and published in the literature but they are overly simplified or are in an extremely complex form. One modeling approach which can capture the nonlinear dynamic properties of the pump yet still retain reasonable simplicity in its basic form is to use neural network technology. Previous studies have shown some limited success in using feed forward neurons with dynamic properties being introduced using time delays. A problem referred to a error accumulation has prevented these neural based models from being practical dynamic representations of load sensing systems. Based on the topology of the biological neural systems several new structures, Dynamic Neural Units (DNU's) have been developed. Only one DNU is necessary to capture or represent some of the dynamics of a plant, which a static (feed forward) neuron cannot do. The main advantage of the dynamic neuron is that it reduces the network dimension and the amount of computational requirement and has the potential to avoid this error accumulation problem. The use of Dynamic Neural Networks with Dynamic Neural Units in simulating a variable displacement pump is presented in this paper. Only the pump portion of the load sensing pump system is considered due to problems of interacting operating points. A DNU structure and a DNN (which is comprised of DNU's) are introduced. The simulation results establishes the feasibility of using a Dynamic Neural Networks with DNU's to model a simulated nonlinear hydraulic system such as a load sensing pump.
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Bruce, A., A. Nightingale, N. Romdhane, M. M. K. Hashmi, S. Beavis, and C. Lennard. "Maintaining consistency between SystemC and RTL system designs." In 2006 Design Automation Conference. IEEE, 2006. http://dx.doi.org/10.1109/dac.2006.229178.

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Desmet, D., D. Verkest, and H. De Man. "Operating system based software generation for systems-on-chip." In 37th Design Automation Conference. IEEE, 2000. http://dx.doi.org/10.1109/dac.2000.855343.

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Richthammer, Valentina, Tobias Schwarzer, Stefan Wildermann, Jurgen Teich, and Michael Glas. "Architecture Decomposition in System Synthesis of Heterogeneous Many-Core Systems." In 2018 55th ACM/ESDA/IEEE Design Automation Conference (DAC). IEEE, 2018. http://dx.doi.org/10.1109/dac.2018.8465811.

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Reports on the topic "DNC system"

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Eastlake, D., and M. Andrews. Domain Name System (DNS) Cookies. RFC Editor, May 2016. http://dx.doi.org/10.17487/rfc7873.

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Eastlake, D. Domain Name System (DNS) IANA Considerations. RFC Editor, March 2011. http://dx.doi.org/10.17487/rfc6195.

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Eastlake, D., E. Brunner-Williams, and B. Manning. Domain Name System (DNS) IANA Considerations. RFC Editor, September 2000. http://dx.doi.org/10.17487/rfc2929.

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Eastlake, D. Detached Domain Name System (DNS) Information. RFC Editor, March 1999. http://dx.doi.org/10.17487/rfc2540.

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Eastlake, D. Domain Name System (DNS) IANA Considerations. RFC Editor, April 2013. http://dx.doi.org/10.17487/rfc6895.

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Eastlake, D. Domain Name System (DNS) IANA Considerations. RFC Editor, November 2008. http://dx.doi.org/10.17487/rfc5395.

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Edinburgh UG iGEM Team, Edinburgh UG iGEM Team. The DNA Typewriter: Building a modular system to encode text in DNA. Experiment, July 2016. http://dx.doi.org/10.18258/7330.

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Eastlake, D. Domain Name System (DNS) Case Insensitivity Clarification. RFC Editor, January 2006. http://dx.doi.org/10.17487/rfc4343.

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Klensin, J. Role of the Domain Name System (DNS). RFC Editor, February 2003. http://dx.doi.org/10.17487/rfc3467.

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Wellington, B. Secure Domain Name System (DNS) Dynamic Update. RFC Editor, November 2000. http://dx.doi.org/10.17487/rfc3007.

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