Дисертації з теми "Density of the network environment"
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Holt, Galen. "Diversity Maintenance In Annual Plants And Stream Communities: The Effects Of Life History And Environmental Structure On Coexistence In A Variable Environment." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/338703.
Повний текст джерелаMistree, Behram Farrokh Thomas. "A flexible high-density sensor network." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46015.
Повний текст джерелаIncludes bibliographical references (p. 171-174).
This thesis explores building and deploying a scalable electronic sensate skin that was designed as a dense sensor network. Our skin is built from small (1" x 1") rigid circuit boards attached to their neighbors with flexible interconnects. Each boardcontained an embedded processor together with a suite of thirteen sensors, providing dense, multimodal capture of proximate and contact phenomena. In addition to the design of the physical system, this thesis develops protocols for internode communication (both neighbor-neighbor and global), and power-efficient wake-on-phenomena operation. The system was rigorously tested with an array of up to 4x3 nodes subject to a variety of sensor stimuli. Although there were some robustness issues in the final design (particularly in the wired interconnects, which were not the focus of this thesis work), the skin that we developed showed good flexibility for a prototype, ran quickly and efficiently, and could detect and respond to a variety of stimuli.
by Behram Farrokh Thomas Mistree.
M.Eng.
Zhang, Jingxuan, and 张静璇. "Therapeutic landscape in high-density urban environment." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B4754479X.
Повний текст джерелаpublished_or_final_version
Architecture
Master
Master of Landscape Architecture
Xu, Yining. "Density and What Matters: A Study of People's Attitudes Toward and Perceptions of Urban Density." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/31305.
Повний текст джерелаIn response to this demand, this research aims to provide a description of the factors that influence peopleâ s perception of higher density environments. Also, it aims to identify peopleâ s important concerns while using outdoor environments.
This study is based on data obtained from an online survey questionnaire that polled public attitudes toward density. The findings from the data indicate that the more important characteristics that people are concerned about the higher density environment are presence of nature, interaction opportunities, building identity and perceived safety. This study also points out that peopleâ s attitudes toward density vary based on certain factors. Those factors are age, occupation, place of residents and type of residents.
This research could be used as a reference for future planning and design. Results of this study reflect participantsâ attitudes towards density. It initiates a discussion of future research and generates a frame work for future study for a larger population.
Master of Landscape Architecture
Chen, Zheng. "HIGH-DENSITY URBAN HOUSING IN CHINA: The Living Environment." Thesis, The University of Arizona, 1997. http://hdl.handle.net/10150/555301.
Повний текст джерелаMohammed, Ali, Sachin Sama, and Majeed Mohammed. "Enhancing Network Security in Linux Environment." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-17144.
Повний текст джерелаHarple, Daniel L. Jr. "Toward a network graph-based innovation cluster density index." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81076.
Повний текст джерелаCataloged from PDF version of thesis. Page 162 blank.
Includes bibliographical references (p. 137-146).
Innovation clusters have been studied and examined in many forms: ranging from qualitative observations to in-depth analytical models and frameworks to long-term studies tracking the actors and entities making up an innovation cluster's ecosystem. Economic development marketing in municipalities, regions, and countries often make representations about their cluster's strengths, yet rarely have strong empirical data to support and back their claims. A wide array of cluster mapping visualization tools exist, yet most focus on aggregate numbers of "nodes," and offer far less insights into their connectedness and relationships between the entities, the "edges" or links. The focus for this thesis is a bottoms-up perspective, with people as the core drivers of innovation. This paper seeks to supplement existing methods, by implementing an innovation cluster density index (CDI) as an indicator, ("Cluster Rank") enabling broader comparisons within clusters (intra-cluster), as well as the modeling of distributed virtual clusters (inter-cluster). This method proposes an empirical analytical approach, using complex network theory, commercially and open source available application program interfaces (APIs), and weighted network graphs as a framework, which integrates these elements to depict a new descriptor for clusters, the Cluster Rank. Implementation of the method in software is outside the scope of this thesis, but is separately being developed and is defined as a software platform using linked data technologies to build it ("Cluster Rank Engine"). The proposed Cluster Rank Engine is people-centric, and takes into account the embedded network effects, of people, derived from network graph analytics. It presents a bottoms-up view to intersect with the relatively top-down approaches currently in place. It identifies five key attributes, the "Penta Helix" and uses these as the core variables in modeling. Development of such a model enables the use of big data methods and algorithmic tools on the Internet to interrogate large distributed economic global datasets, query and extract the relevant pre-defined cluster attribute data, filter and process it to present a deeper analytically comparative lens of innovation clusters; both in terms of urban innovation mapping, cluster heat maps, etc. This method would enable, for example, the comparison of a biotech cluster in Cambridge with that of one in San Francisco ("Global biotechnology clusters map," n.d.), at discrete levels. The Cluster Rank for each discrete innovation cluster provides additional data beyond traditional graphical visualizations. Utilization of the Cluster Rank Engine across a wide range of clusters could then yield deeper statistically comparative data for a deeper understanding of cluster dynamics and cluster endurance over time, as well as serve as data input for a variety of graphical data visualizations. (Berkhin, 2002) Utility for such a solution is multi-fold: as an economic cluster modeling and tracking tool, an innovation lens on a given sector or geography, and as a tool for urban innovation mapping. At its fruition, it becomes a potentially predictive tool for network resilience and failure, to help better navigate decisions related to the growth of innovation clusters and/or the linking of remote clusters for a virtual cluster, to help make decisions for: resource allocations, partnership and contractual targets, angel and venture funding strategies.
by Daniel L. Harple, Jr.
S.M.in Management
Sareh, Said Adel Mounir. "Ubiquitous sensor network in the NGN environment." Thesis, Evry, Institut national des télécommunications, 2014. http://www.theses.fr/2014TELE0016/document.
Повний текст джерелаUbiquités Sensor Network (USN) is a conceptual network built over existing physical networks. It makes use of sensed data and provides knowledge services to anyone, anywhere and at anytime, and where the information is generated by using context awareness. Smart wearable devices and USNs are emerging rapidly providing many reliable services facilitating people life. Those very useful small end terminals and devices require a global communication substrate to provide a comprehensive global end user service. In 2010, the ITU-T provided the requirements to support USN applications and services in the Next Génération Network (NGN) environment to exploit the advantages of the core network. One of the main promising markets for the USN application and services is the e-Health. It provides continuous patients’ monitoring and enables a great improvement in medical services. On the other hand, Vehicular Ad-Hoc NETwork (VANET) is an emerging technology, which provides intelligent communication between mobile vehicles. Integrating VANET with USN has a great potential to improve road safety and traffic efficiency. Most VANET applications are applied in real time and they are sensitive to delay, especially those related to safety and health. In this work, we propose to use IP Multimedia Subsystem (IMS) as a service controller sub-layer in the USN environment providing a global substrate for a comprehensive end-to-end service. Moreover, we propose to integrate VANETs with USN for more rich applications and facilities, which will ease the life of humans. We started studying the challenges on the road to achieve this goal
Larsson, Jonas. "Network Automation in a Multi-vendor Environment." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80810.
Повний текст джерелаYu, Hui. "A low-density, terrestrial network approach to high accuracy postioning." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445354.
Повний текст джерелаRuan, Zheng. "Wireless Sensor Network Deployment in Mobile Phones Environment." Thesis, Uppsala University, Department of Information Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-111248.
Повний текст джерелаParticipatory sensing is a rising and promising field, which utilizes mobile phone users as mobile wireless sensors to gather data. However, because of the randomness of its participants, it is necessary to deploy wireless sensors in the sensing area at the same time, in order to gather enough quantity data with satisfactory quality. The deployment becomes a challenge because participatory sensing processes are dynamic and wireless sensor networks are relatively static.
In this thesis, we propose a framework for the wireless sensors deployment in the participatory sensing campaigns. The aim is to minimize the number of sensors deployed, while providing enough satisfactory quality of data. Our framework consists of several sub-models and has a great flexibility. The experiments prove a good performance for our deployment framework.
Chi, Zhihang. "Airline yield management in a dynamic network environment." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11735.
Повний текст джерелаShih, Loren C. "Network Clubhouse : a constructive learning environment for children." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40597.
Повний текст джерелаberglund, Mattias. "Bluetooth LE Mesh Network in an Industrial Environment." Thesis, Linköpings universitet, Kommunikationssystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-153782.
Повний текст джерелаElnerud, Albin. "Comparison of hardware firewalls in a network environment." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-35608.
Повний текст джерелаChenqi, Cao. "Job Scheduling Using Neural Network in Environment Inspection." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-337630.
Повний текст джерелаRoon, Selwin Jakobus Emiel. "Resource dimensioning in a mixed traffic environment." Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-01242006-093750.
Повний текст джерелаXing, Liqun 1962. "Marker density, marker distribution and QTL-by-environment interaction in QTL mapping." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36734.
Повний текст джерелаMorganti, Michele. "Sustainable density : form, built environment, energy = Densità sostenibile : forma, ambiente costruito, energia." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/365041.
Повний текст джерелаLa ricerca esplora significati, proprietà e capacità analitiche del concetto di densità e delle sue possibili interpretazioni nell’ambito dell’architettura e della sostenibilità. Il suo obiettivo è la determinazione di relazioni tra costruito, energia e forma dei tessuti urbani della città compatta mediterranea ricorrendo alla densità quale parametro utile a decifrarne le specificità. A dispetto della sempre maggiore insostenibilità della città odierna, di fronte alla crisi energetica ed ambientale in atto, recenti statistiche hanno confermato il crescente potere attrattivo delle aree metropolitane. Nel contesto della città compatta europea, i nuovi modelli insediativi basati su principi di risparmio energetico rappresentano una percentuale insignificante rispetto alla città esistente che, nel funzionare, incide notevolmente sull’inefficienza dell’intero sistema metropolitano. In questo quadro, potrebbe essere risolutivo identificare un approccio che individui strumenti e metodi progettuali alla scala urbana piuttosto che a quella architettonica, utili a definire condizioni più appropriate e realmente incisivi per la città compatta. Se riferito in primo luogo a tale scala il rapporto tra energia e forma assume un ruolo centrale sulla variazione delle prestazioni energetiche; allo stesso tempo il concetto di densità appare un’efficace strumento di analisi delle prestazioni morfologiche del costruito. La ricerca si compone di cinque parti. La prima analizza la condizione odierna delle dinamiche urbane ed energetiche, per comprendere ruolo e contributo dell’edilizia alla luce dell’avanzamento del pensiero scientifico e degli strumenti operativi disponibili. La seconda affronta il significato e l’evoluzione del concetto di densità quale parametro di misura, strumento progettuale e fondamento teorico, facendo riferimento in particolare alle interazioni con la forma urbana e la sostenibilità. Nella terza si utilizzano le capacità analitiche della densità per comprovare le implicazioni ambientali e verificare l’esistenza di leggi di dipendenza tra indicatori di sostenibilità urbana e densità. La quarta pone le basi per la comprensione delle relazioni tra densità ed energia alla scala urbana. La quinta parte, infine, indaga tali relazioni nei tessuti compatti di Roma e Barcellona declinandole in termini di caratteri formali e costruttivi, con l’ausilio di modellazioni e simulazioni strutturate allo scopo di controllare i corrispondenti fattori. S’illustra l’influenza di morfologia urbana e caratteri tipologico-costruttivi su guadagno solare e domanda energetica per riscaldamento e climatizzazione, individuando per mezzo di differenti definizioni d’indicatori di densità, i più adeguati ad esprimere con queste leggi di variazione affidabili. I risultati evidenziano che il contributo dell’edilizia alla complessa questione energetica posta dai sistemi metropolitani deve concentrarsi sulla riduzione della domanda - ancor prima che su consumo e impatto - operando con strumenti e metodi interscalari per la trasformazione della città esistente. La densità ha un ruolo privilegiato nel rapporto forma-sostenibilità per capacità interpretative e significati assunti quale categoria teorica e progettuale. A scala metropolitana, indicatori di sostenibilità urbana e densità non sempre mostrano chiare relazioni con le implicazioni ambientali ed energetiche. Morfologia, tipologia e aspetti costruttivi sono i fattori che più intervengono sulla variazione delle prestazioni energetiche dei tessuti urbani. Analizzarli mediante parametri di densità conduce alla comprensione del diverso comportamento energetico, fornendo un contributo agli strumenti d’indagine a scala urbana e favorendo una connotazione più efficiente del costruito riconducibile alla dimensione della densità sostenibile. Il metodo e gli strumenti individuati si offrono come base di conoscenza per trasformazioni consapevoli della città compatta mediterranea
El presente estudio indaga significados, propiedad y capacidad analíticas del concepto de densidad y de su posible interpretación en el ámbito de la arquitectura y de la sostenibilidad. El principal objetivo es determinar las relaciones entre ambiente construido, energía y forma de los tejidos urbanos recurriendo a la densidad como parámetro útil para descifrar sus especificidades de la ciudad compacta mediterránea. A pesar de una siempre mayor insostenibilidad de la ciudad actual, frente a la crisis energética y ambiental en curso, estadísticas recientes han confirmado el creciente poder atractivo de las metrópolis. En el contexto de la ciudad europea, los modelos de asentamiento actuales, basados en principios de ahorro energético, constituyen un porcentaje insignificante frente a la ciudad existente que, funcionando, grava notablemente en consumo el sistema metropolitano. En esta situación, podría ser resolutivo identificar un acercamiento que identifique herramientas y métodos para el proyecto a escala urbana, que sean útiles para definir condiciones más apropiadas y sean realmente eficaces para la ciudad compacta. Si se refiere en primer lugar a dicha escala, la relación entre energía y forma asume una función central para la variabilidad de la prestación energética; al mismo tiempo el concepto de densidad parece una herramienta eficaz para analizar las prestaciones morfológicas del ambiente construido. La investigación se compone de cinco partes. La primera analiza las dinámicas urbanas y energéticas actuales, para entender capacidad y contribución de la construcción a la luz del avance del pensamiento científico y de las herramientas disponibles. La segunda trata el significado y la evolución del concepto de densidad como parámetro de medida, herramienta del proyecto y origen teórico de la arquitectura, con particular referencia a las interacciones con la forma urbana y la sostenibilidad. En la tercera se utilizan las capacidades analíticas de la densidad para comprobar las repercusiones ambientales y verificar la existencia de leyes de dependencia entre indicadores de sostenibilidad urbana y densidad. La cuarta explica las relaciones entre densidad y energía a la escala urbana. La quinta, finalmente, estudia estas relaciones en los tejidos compactos de Roma y Barcelona, explicándolas en función de forma i construcción, con el auxilio de modelos y simulaciones. Se muestra la influencia de la morfología urbana y las características tipológicas y constructivas sobre la captación solar y la demanda energética por calefacción y climatización, individualizando entre diferentes indicadores de densidad los más apropiados para representar tendencias fiables. Los resultados prueban que la contribución de la construcción a la compleja cuestión energética tiene que basarse en la reducción de la demanda - antes que del consumo y del impacto - utilizando herramientas y métodos multi-escalares para la transformación de la ciudad existente. La densidad tiene una función privilegiada en la relación forma-sostenibilidad que depende de sus capacidades analíticas y significados en calidad de categoría teórica y del proyecto. A escala metropolitana, los indicadores de sostenibilidad urbana y densidad no siempre muestran una relación clara con las repercusiones ambientales y energéticas. Morfología, tipología y aspectos constructivos son los factores que más influyen sobre la variación de la prestación energética de los tejidos urbanos. Analizarlos recurriendo a parámetros de densidad, lleva a entender el diferente comportamiento energético, contribuye a las investigaciones a escala urbana y favorece la eficiencia del ambiente construido, con lo cual se reconduce el análisis al concepto de densidad sostenible. La metodología y las herramientas individualizadas se ofrecen como base de conocimiento para orientar las transformaciones de la ciudad compacta mediterránea.
Xing, Liqun. "Marker density, marker distribution and QTL-by-environment interaction in QTL mapping." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0034/NQ64696.pdf.
Повний текст джерелаMobasheri, Ali. "The effect of the extracellular environment on sodium pump density in cartilage." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320642.
Повний текст джерелаBodin, Simon, and William Karlsson. "Network Structure and Economic Performance." Thesis, Mittuniversitetet, Avdelningen för ekonomivetenskap och juridik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-21834.
Повний текст джерелаAsakura, Kouichi, Toyohide Watanabe, and Noboru Sugie. "C parallelizing compiler on local-network-based computer environment." IEEE, 1993. http://hdl.handle.net/2237/6859.
Повний текст джерелаStone, Steven Walter. "A rapidly reconfigurable, application layer, virtual environment network protocol." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA312937.
Повний текст джерелаQu, Jun. "The communication network simulator for Concordia Parallel Programming Environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ59338.pdf.
Повний текст джерелаHussain, S. A. "An active scheduling paradigm for open adaptive network environment." Thesis, Queen's University Belfast, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273292.
Повний текст джерелаYang, Shun Yu. "OPNET/STK integrated environment for modeling an UAV network." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FYang.pdf.
Повний текст джерелаThesis advisor(s): Alex Bordetsky, Rex Buddenberg. Includes bibliographical references (p. 45). Also available online.
Jackman, John Daniel III. "A network development and runtime environment for StarLogo TNG." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41630.
Повний текст джерелаIncludes bibliographical references (leaf 44).
StarLogo: The Next Generation aims to introduce students to programming. The StarLogo application is frequently used in a classroom setting, but the effectiveness of StarLogo is limited as long as students cannot interact with each other using the application. This thesis describes the design and implementation of a networked development and runtime environment for StarLogo. Hopefully, students will become more interested in programming when they can collaborate to create and run StarLogo programs. In addition, teachers will have more options available when choosing classroom activities using StarLogo.
by John Daniel Jackman, III.
M.Eng.
Lee, Byungjin. "BUILDING A SECURE NETWORK TEST ENVIRONMENT USING VIRTUAL MACHINES." CSUSB ScholarWorks, 2019. https://scholarworks.lib.csusb.edu/etd/947.
Повний текст джерелаGruesen, Michael G. "Towards an Ideal Execution Environment for Programmable Network Switches." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468834070.
Повний текст джерелаPark, Gwang Hoon. "Handwritten digit and script recognition using density based random vector functional link network." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1061911553.
Повний текст джерелаDownard, Lucas M. "The Effect Overall Density Plays On Performance and Preference in a Windowed Environment." UNF Digital Commons, 2013. http://digitalcommons.unf.edu/etd/434.
Повний текст джерелаCampbell, Mackenzie Andrew. "Interaction Of Stocking Density And The Feeding Environment In Lactating Holstein Dairy Cows." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/776.
Повний текст джерелаVASISHT, GAURAV. "MODELING BASE ACCIDENT RATE/DENSITY USING NEURAL NETWORKS." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037645154.
Повний текст джерелаGwanvoma, Stephen B. "Systems Approach to Cross-Layer Optimization of a Complex Wireless Environment." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595765.
Повний текст джерелаThis paper presents a method for the optimization of mixed networks that incorporates a mixed layer optimization of performance features. The expanded integrated Network Enhanced Telemetry (iNET) system envisioned telemetering for large and complex networks which will require core telemetry networks with ad hoc extensions for coverage. Organizing such a network has been successfully accomplished in simulations using a K-mean clustering algorithm. This paper shows how the features of these network elements will be captured and disseminated in a real system. This management of network elements across multiple layers is characterized as cross-layer optimization. This paper will also show how such cross layer features can be combined for a globally optimum solution. It shows by example how the iNET system comprising multiple ground stations, gateways, frequency, nodes, and three performance measures can be optimized to achieve overall optimal system performance.
Le, Hung-Anh, Jo-Chun Kim, Yuan-Shing Perng, and In-Won Kim. "First workshop of the Asian Network for Environment and Energy." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-126791.
Повний текст джерелаChâu Á là một trong những khu vực đông dân nhất trên thế giới. Nhiều quốc gia tại châu Á đã có sự phát triển kinh tế mạnh mẽ và đô thị hóa rất nhanh trong thập kỷ vừa qua. Tuy nhiên, khu vực châu Á cũng đối mặt với các thách thức về bảo vệ môi trường, phát thải CO2 và an ninh năng lượng. Mục đích thành lập Mạng lưới châu Á về Môi trường và Năng lượng (ANEE) nhằm kết nối các tổ chức nghiên cứu và đào tạo, tạo điều kiện cho trao đổi kinh nghiệm và know-how, xây dựng các dự án tổng thể về bảo vệ môi trường và năng lượng tái tạo. Mạng lưới tổ chức các Hội thảo khoa học hàng năm, phát triển các dự án giải quyết các vấn đề môi trường thời sự của khu vực, xây dựng các chương trình đào tạo nhân lực ngành môi trường và năng lượng tái tạo. Hội thảo lần thứ nhất của ANEE được tổ chức tại Tp.Hồ Chí Minh là sự kiện khởi động Mạng lưới với các chuyên đề về Ô nhiễm không khí, Quản lý nguồn nước, chất thải rắn và năng lượng
Zheng, Zhi-Qian, and 鄭智謙. "A semi-automatic configuration control system for high-density WiFi network in large indoor environment." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/65zyyw.
Повний текст джерела國立臺灣大學
電信工程學研究所
107
In order to meet the needs of various applications in various large-scale fields such as factories or public spaces, enough access points(APs) must be built to ease the congestion of the network. However, in the case of limited spectrum resources, the quality of such wireless networks will not be improved with the increasing number of access points. On the contrary, as the density of access points in a fixed area becomes higher, the signals from different access points will cause interferences among different radio links. Without professional background, a high-overlap, high-interference wireless network environment may be generated, and data transmission rate or delay may be seriously degraded due to collisions and interference. To solve this type of problems, exhaustive methods or genetic algorithms are often used, but the time and computation are quite large. In order to improve overall system efficiency, shorten time and approximate optimal solution, this study proposes a semi-auto configuration control system(SCCS), which employs periodic adjustment of power and channel bandwidth of various APs. There are two main indicators for evaluating the performance of algorithm: (1) the number of devices meeting their quality of service and (2) overall system interference condition. Utility function is the multiple of two indicators for assessing overall performance. The experimental simulation considers a variety of different fields, and the most effective scenario for SCCS is the high-density field, which SCCS improve performance about 52% after optimization. When compared genetic algorithms with SCCS, genetic algorithms can achieve good results in most of the optimization problems, but the consumed computation time and huge amount of computation requirement are still the most significant limits in practice. Providing the balance of the computational time and the pros and cons of the results is the main contribution of this study.
KAI-SHANHOU and 侯凱山. "The application of a high-density street-level air temperature observation network (HiSAN): spatial and temporal variations of wind and thermal environment." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/55m62c.
Повний текст джерела國立成功大學
建築學系
107
The urban warmer phenomenon has become more obvious with the process of urbanization, and the influence of wind environment and climate pattern in urban areas on urban high temperature is very important. In this study, the calculation of the land rough length is applied by calculating the rough length of the city to predict the wind environment in Tainan. At the same time, the high-density street-level air temperature observation network (HiSAN) is also used to explore the characteristics of the wind and thermal environment in Tainan. The results show that the large water area in the daytime will obviously cool down the surround area. At night, the green area will have a significant cooling effect on air temperature. The urban composition factors will have different effects in different time periods. At the same time, climatic conditions will also affect the difference in the distribution of high temperature. The daily temperature difference will cause the high temperature to be located in more inland, and the wind field in the large environment will cause the difference between high temperature in north and south side. According to the above results, urban impact factors of thermal environment include: urban composition factors, climatic conditions, and different time periods. In the future, when faced with the situation of hyperthermia, the mitigation strategy should consider the interaction between more different parameters in a specific time period.
Кулаков, Алексей Юрьевич. "Програмно-аппаратная организация GRID-систем на основе технологии виртуальных сетей". Doctoral thesis, 2010. https://ela.kpi.ua/handle/123456789/655.
Повний текст джерелаWu, Chi-Shiun, and 吳奇勳. "Network Migration Base on Hybrid Cloud Network Environment." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/74259034010232249383.
Повний текст джерела國立東華大學
資訊工程學系
103
The migration mechanism can provide services, computing jobs and resources moved from a virtual environment to another virtual environment and can be categorized into resource migration, host migration and network migration. The network migration mechanism can move all virtual machines within the subnet, including services, storage space and other resources to another subnet, while retaining the network topology and network infrastructure. To achieve the objective of network migration, in the paper, we proposed a migration mechanism that can move all virtual machines and the network environment to another set of machines on a hybrid cloud environment. The proposed solution is implemented based on Open Flow and XEN, and use of existing network protocols. The emulation results show that the proposed solution can provide very good performance.
Yeh, Jen-sung, and 葉仁頌. "NETWORK PERFORMANCE IN VIRTUAL ENVIRONMENT." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/88918844608595072798.
Повний текст джерела大同大學
資訊工程學系(所)
104
In the early information center, there are many stand-alone servers. The server contains the central processor, memory and storage unit. Each of them was installed the operating system, application software and kept all the data in the internal storage. In recent years, enterprises have gradually virtualization, virtualization is the foundation of cloud computing, cloud computing needs with rapid growth, from the early single virtualized server virtualization, and gradually developed into server computing unit, storage unit and a network unit independently. With server virtualization, the proportion of enterprises increased year by year, the company's next step is to enhance the efficiency of virtualization to reduce IT operating costs. On traditional concepts, optimize virtual infrastructure, we are to enhance the processor speed, more memory or faster network equipment and so on. The purpose of this paper is to study in a virtual infrastructure, enhance storage input/output access rate of virtual environments, can effectively improve the transmission efficiency of the implementation of virtual machines, thereby supporting the need to enhance the effectiveness of the storage unit.
Chiou, Ying-Tzu, and 邱映慈. "Population Density Based Network Selection for Multi-rate and Multi-AP WiFi Network." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/81147008722264723715.
Повний текст джерела國立交通大學
電信工程研究所
105
In this thesis, we discuss and analysis performance based on throughput. According to IEEE 802.11 standard, physical layer provide multiple data rate supported by multiple antennas. However, the actual throughput is limited with MAC (Media Access Control) layer mechanism that adapting DCF (Distribution Coordination Function). In DCF, each client has the same probability to access the channel in the AP in long time transmission so that low rate clients occupy longer time to access channel. As a result, the access time of clients is reduced and the throughput is lower. On the other hand, in multi-rate multi-AP system, client selects the highest RSSI (Received Signal Strength Indicator) from candidate APs to achieve the greatest data rate for existing method. However, this approach leads to overloading of particular AP so that actual client throughput is lower. Ergo, we use grouping to separate clients based on different data rate in groups to avoid lower throughput due to contention together from different rate in single AP. For multi-AP, We propose PD (Population Density) based network selection from viewpoint of client. In PD based network selection, we fit functions based on different data rate according to simulation and analysis. The best client throughput of all connections can be determined by functions and access the AP which provide maximal client throughput. After designing, we compare performance of PD based network selection with those of exiting HR (high rate) based network selection. PD based is always have better performance than HR based network selection. Also, the performance improvement of PD based network selection is 400% in the best case.
Wu, Song-Yang, and 吳松陽. "Development Environment for Parallel Network Simulation." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/85549404487216606249.
Повний текст джерела國立交通大學
資訊工程學系
84
Simulation is a common computation paradigm. Some simulation problemcan be computed by evaluating each part of the domain repeatedly. Weatherprediction, for example, can be simulated by repeatedly evaluating the valuesof wind speeds, temperatures, barometers, etc., of each subdomain everyperiod of time. For parallel simulation, we can distribute all the subdomainsto be executed over individual processors. However, it is not easy to designan efficient parallel simulation algorithm to distribute all the tasks overprocessors at run time because we need to balance the load among processorswhile minimizing the amount of communication between processors. In this thesis, we design a tool to help programmers to designparallel simulation programs easily. This tool provide an interface that letsdistributing subdomains over processors and modeling the problem be processedseparately. So, we can implement scheduling algorithms easily.
Chen, LiFen, and 陳麗芬. "Development of Bayesian Network System Environment." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/04640294179582630277.
Повний текст джерела國立中山大學
資訊工程研究所
82
Bayesian networks have proved to be an effective tool for tasks requiring automated reasoning under uncertainty and have been applied to many research areas such as medical diagnosis, map learning, language understanding, computer vision, etc in the last few years. In order to let the related researchers have accessible to Bayesian networks without struggling in understanding the complicated theory and going through the tedious implementation, we have developed and designed a set of tools for the establishment of Bayesian networks. The networks is interactively created by adding nodes and links through a graphical user interface. The belief fusion and propagation is handled by updating the new evidence for certain nodes, then the information of new state of network is computed and displayed on the system. The object oriented approach is used to develop the system. It includes the use of object-oriented analysis and design, design of the graphical user interface, design of classes, objects and the relationships among them, design of users' manual , documentation, testing, and verification. Two examples have been used to demostrate the powerful reasoning ability under new evidence and friendly environment of the system.
Tseng, WanTing, and 曾婉婷. "Authentication Protocols for Heterogeneous Communication Network Environment." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/42245751825288736140.
Повний текст джерела國立中正大學
資訊工程研究所
99
With the increased demand in ubiquitous wireless access, we merge different but complementary wireless access technology to compose global wireless heterogeneous network, such as GSM and 3GPP, to provide mobile users the advantage of roaming services without geographical limitation. Hence, the handover technique is playing an important role nowadays to meet the epidemic mobile device usage. It has a great challenge to provide authentication such as computation overload as well as the key management burden. In 2009, Huang et al. proposed the One-time key Secure Network Protocol (OSNP) scheme. It can not only resist the man-in-the-middle attack but also reduce the computation load. Nevertheless, we have found that there still exist several defects in this method. For this reason, we aim to provide a new handover mechanism for enhancing the secure property as well as reducing the computation cost. Moreover, we provide the formal security analysis of BAN logic to demonstrate the applicability of the protocol. Besides, owing to the mobile device only can keep limited electricity, thus the computation cost of the mobile users becomes primary defiance in the verification phase. To reduce the heavy burden of the mobile users, Shrestha et al.’s scheme proposed a Kerberos based authentication protocol, for the mobile user to reduce the computation costs and the communication rounds. Unfortunately, according to our observation, some weaknesses still exist in Shrestha et al.’s scheme. Therefore, we propose a new version with a novel architecture and then we utilize random oracle to prove the security our scheme. Keywords: Mutual authentication, key agreement, Kerberos, Anonymous, Handover, BAN logic, Random oracle
Chang, Shen-Jong, and 張憲忠. "Distributed Virtual Environment over Ad Hoc Network." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/18108027301796618766.
Повний текст джерела國立中正大學
資訊工程研究所
92
Distributed Virtual Environment (DVE) is a very popular application in wired network in recent years. But no product is developed for wireless network and little research is conducted in the literature. In this paper, we first discuss the network topology of DVE, and we find that how to efficiently use the bandwidth is a critical issue to decide the quality of DVE. Many research results point out that the technology of multicast can be used for DVE to reduce the bandwidth consumption. In mobile ad hoc network (MANET) environment, which has the characteristic of low bandwidth, multicast is a very suitable technique for developing a DVE. In this paper, we propose a hierarchical tree-based self-addressing algorithm, by which packets can be routed efficiently. Then we develop a novel small group multicast algorithm based on our tree architecture. We have performed simulations to evaluate the performance of our multicast algorithm, and the result point out that it reduce the bandwidth consumption. Finally, we implement a simple DVE by taking use of our algorithm to show that our method is feasible significantly.
Wang, Jyh-Shyang, and 王志祥. "Development Environment for Multimedia Transmission on Network." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/00919292608990371780.
Повний текст джерела國立交通大學
電子研究所
84
Multimedia transmission is just the current trend of the moderncommunication. Somehow with the bandwidth we have today, this combinationof video, audio and many still images would be such great amount ofinformation and the transmission could be terribly time-consuming. As aresult, people are working on the techniques to fit the very low bit ratenetwork, but mostly they just lack of the demonstration platform for theexperiment and experience of the quality and efficiency of their researchand development.In this thesis, an exprimental development platform is proposed. Thisplatform provides users an integrated environment to develop their owncompression/decompression programs with simply plug-and-play, and it alsosimulates the very low bit rate network environment similar to the MODEMtransmission. What is more, this platform supports external audio input andoutput, still image display, motional video playing and an interactivelytalking electric whiteboard. With the platform implemented in this thesis,users will save the efforts to design the user interface and to communicatewith the complicated hardware. Finally, the methodology and analysis of thedesign issues will be discussed in this thesis as well.
Tseng, Chi-Mei, and 曾綺湄. "Graphic User Interface of Virtual Network Environment." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/15562559180357677279.
Повний текст джерелаSuresh, M. "UAV Group Autonomy In Network Centric Environment." Thesis, 2013. http://etd.iisc.ernet.in/handle/2005/2596.
Повний текст джерелаLin, Chao-Cyun, and 林超群. "A Network Migration Solution Based on Mobile IPv6 Network Mobility for Hybrid Cloud Network Environment." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/79890662070900058486.
Повний текст джерела國立東華大學
資訊工程學系
104
Migration is an important research issue in cloud computing. For example, when the some emergency situations, the computers for the cloud computing servers should be closed, we need to move the cloud computing resources from a virtual environment to another virtual environment. The network migration can be used to move the entire cloud computing resources and network configuration from a computer center to another computer center. In our paper, we proposed the live network migration solution based on the mobile IPv6 NEMO. The proposed solution uses tunnel technology to establish logical communication between the migrated computer center and the target computer center, and uses the binding updated to change the network topology. The experiment results show that the proposed solution can provide live network migration for the hybrid cloud network environment.