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نتیجه جستجو - FSI

تعداد مقالات یافته شده: 15
ردیف عنوان نوع
1 Offsite construction supply chain strategies for matching affordable rental housing demand: A system dynamics approach
استراتژی های زنجیره تأمین ساخت و ساز خارج از ساختمان برای مطابقت با تقاضای مسکن اجاره ای ارزان قیمت: رویکرد پویایی سیستم-2021
Australian housing affordability is influenced by both housing supply and demand factors. These factors include lengthy construction and planning process. The affordability crisis affects the housing rental sector, which accommodates more than 20 % of Australian household. This research developed a system dynamics model to simulate demography-linked affordable rental housing demand and supply in South East Queensland (SEQ). A Prefabricated Offsite Construction (OSC) housing supply strategy is compared with a traditional building approach (BAU) to investigate the effectiveness of OSC techniques to reduce informational asymmetries during development planning stages to deliver better affordable rental housing is linked to housing needs in SEQ. The model focuses on demographic groups housing demand of one, two- and three-bedroom apartment units and examines how reductions in the development process, through OSC methods, influence the efficiency of Government supported affordable rental housing supply schemes. Overall, the study finds that reduced planning and construction timeframes through OSC methods may improve demography-linked rental housing supply by approximately 6.6 % overall compared to BAU in SEQ. For 1,2- and 3-bedroom apartment demand, OSC strategies are expected to improve supply efficiency by 8.7 %, 8.4 % and 9.2 %, respectively. Optimal OSC strategies were assessed and found that flexibility in development sizes have an outsized positive effect. The study has implications for Government supported affordable rental housing strategies, including the build to rent sector.
Keywords: Offsite construction | Sustainable development | Social resilience | Affordable housing policy | Urban systems modelling | System dynamics | Prefabrication
مقاله انگلیسی
2 A vision-based approach for automatic progress tracking of floor paneling in offsite construction facilities
یک رویکرد مبتنی بر چشم انداز برای ردیابی پیشرفت اتوماتیک پوشش کف در تاسیسات ساختمانی خارج از منزل-2021
Offsite construction is an approach focused on moving construction tasks from traditional jobsites to manufacturing facilities. Improved productivity of construction tasks is paramount in terms of competitiveness and is achieved through the continuous improvement of operations and planning, which often relies on historical data obtained from previous projects. Despite being a common practice, current methods, such as time studies, are not able to capture the changing scenarios resulting from improvements to production. This paper presents a novel approach to automatically detect and track the progress of construction operations by applying a method that combines deep learning algorithms and finite state machines to existing footage captured by closed-circuit television (CCTV) security cameras. Applied in the context of floor panel manufacturing stations, the proposed method examines entire production days recorded by CCTV cameras, while providing the durations of each task, its required resources, and the task efficiency per panel with high accuracy.
Keywords: Offsite construction | Construction automation | Computer vision | Productivity | Machine learning | Task efficiency
مقاله انگلیسی
3 “Familiar strangers” in the big data era: An exploratory study of Beijing metro encounters
"غریبه های آشنا" در عصر داده های بزرگ: یک مطالعه اکتشافی از برخورد مترو پکن-2020
Traditionally, familiar strangers are defined as those we encounter and observe repeatedly in the city but never interact with. They are common to most urban dwellers. They also have various socioeconomic, sociopsychological and public-policy implications, which have only been sporadically mentioned and/or examined in existing studies across different disciplines. In this manuscript, we first summarize fragmental existing studies on familiar strangers that are defined in the traditional manner based on “small data” such as survey responses. Then we reconceptualize “familiar strangers” against the backdrop of the emergence and increased availability of big and open data. Such familiar strangers are called “familiar strangers in the big data era” (FSiBDE). After this, we have done the following: (a) synthesized and hypothesized factors influencing the distribution and quantity of the FSiBDE; (b) conducted an empirical study in the context of Beijing to embody and operationalize a special type of the FSiBDE among metro riders and to study its possible influencers. We find that across metro stations, it is spatial structure, population distribution, and transport network that significantly influence the count and odds of FSiBDE among millions of metro riders. In addition, the FSiBDE also can have important policy and planning implications for operating metro services and managing metro station.
Keywords: Familiar stranger | Big data era | Implications | Odds | Distribution | Beijing
مقاله انگلیسی
4 Analysis of power law fluid-structure interaction in an open trapezoidal cavity
تجزیه و تحلیل تعامل قدرت ساختار سیال در قانون در حفره ذوزنقه باز-2020
The present paper investigates the mixed convection heat transfer of non-Newtonian fluid-structure interaction (FSI) inside an open trapezoidal cavity. The base of the cavity is fixed at constant temperature while the other walls are adiabatic. The flow passes over the open side of the cavity through a parallel-plate channel. An elastic fin is dangled from the top wall of the channel and stand facing the open cavity. The current model presents a two- dimensional incompressible laminar flow and unsteady-state conditions using the non-Newtonian power- law fluids. Numerical simulation is achieved using finite element method with arbitrary Lagrangian–Eulerian (ALE) scheme. The effects of Cauchy number, Reynolds number, Richardson number and the index of power law fluid are examined with ranges of (Ca = 10 − 20 –10 − 3 , Re = 100–300, Ri = 0.01–10 and n = 0.5–1.5). The results show that at Re = 300, Nusselt number of a stifffin is 2.6% and 7% higher than that of softer flexible fin for n = 0.5 and 1.5, respectively. For low Ri number, shear-thickening fluid manifests higher Nusselt number while for high Ri number, the shear-thinning fluid has the higher values. It is found also that the fluttering phenomenon of the fin takes place at the highest Ri and Re numbers with shear-thinning fluid and Newtonian fluid as well.
Keywords: Non-Newtonian fluid | Power law | FSI | Mixed convection | Trapezoidal cavity | Channel
مقاله انگلیسی
5 An experimental contingent valuation of users’ attitudes towards a Crowd Management System
یک ارزیابی تجربی از نگرش کاربران نسبت به یک سیستم مدیریت جمعیت-2020
Smart city projects are being launched globally to enhance the well-being of citizens. Meanwhile, the valueadded of the projects is not easy to evaluate due to the non-market nature of the public services provided. This study intends to investigate the attitudes of potential users of a Crowd Management System (CMS) to help with the decision-making on smart city projects. The CMS studied in this paper is applied in large-scale events to enable safe and efficient dissipation of event participants as one of the pilot Smart City projects in Hong Kong. It does so by providing real-time information on public transport for their return journeys when a large number of participants all finish their activities within a short time span. Reducing injuries of pedestrians can be achieved in major gatherings to improve safety. This paper presents an experimental analysis of users’ attitudes towards the CMS with the Contingent Valuation (CV) method. A marathon event in Hong Kong was chosen for an on-thespot survey of actual users as part of an experimental study. Subsequently a similar survey was carried out offsite among marathon runners not participating in that event (as a control group) for data reliability comparison. The Willingness-to-Pay value is also derived from the pooled samples to evaluate users’ attitudes. Besides, the results indicate that runners’ perceived usefulness and online payment habit significantly influence the stated Willingness-to-Pay (WTP) for the CMS in question.
Keywords: Crowd Management System | Contingent Valuation method | Willingness-to-pay | Information and Communication Technology | Smart city
مقاله انگلیسی
6 تاثیرات اجتماعی جشنواره های موسیقی: آیا فرهنگ روی برخورد افراد محلی با رویدادها در صربستان و مجارستان اثر میگذارد؟
سال انتشار: 2017 - تعداد صفحات فایل pdf انگلیسی: 12 - تعداد صفحات فایل doc فارسی: 40
علاقه رو به رشدی دربین مجامع علمی به بررسی تاثیرات جشنواره ها روی جوامع وجود دارد. این مقاله شامل تحقیقی نوین است که در آن از مقیاس برخورد با اثر اجتماعی (FSIAS) برای دو جشنواره مقیاس – بزرگ موسیقی اکسیت (صربستان) و زیگت (مجارستان) استفاده شده است. به علاوه، این مقاله تاثیر واسطه ای ابعاد فرهنگی و ملی هافستد را روی برداشت ساکنان از تاثیرات این جشنواره ها روی جوامع آنها بررسی می کند. این مطالعه ابعاد تاثیرات اجتماعی آنها را شناسایی کرده و آشکار می کند که چگونه ابعاد فرهنگی این دو کشور مختلف به برداشت ساکنان از تاثیرات جشنواره ها مرتبط می شود. نتایج یک زیرساختار شش عاملی را آشکار می کنند که نشانگر دو بُعد اصلی (مثبت و منفی) جشنواره های موسیقی مقیاس – بزرگ هستند و بیان می کند که فرهنگ ملی به صورت قابل توجهی بر برداشت افراد محلی از تاثیرات این جشنواره ها روی جوامع اثر می گذارد. این مطالعه با دلالت های تئوریکی و عملی نتیجه گیری می کند و خطوططط تحقیقاتی آتی را طرح می کند.
کلیدواژه ها: FSIAS | ابعاد هافستد | جشنواره موسیقی مقیاس – بزرگ | تاثیر اجتماعی | صربستان | مجارستان
مقاله ترجمه شده
7 MACGSP6: A protocol for supporting internet of things applications with Non-Line-of-Sight links
MACGSP6: پروتکلی برای پشتیبانی برنامه های اینترنت اشیاء با لینک های Non-Line-of-Sight-2017
Wireless Networks with random topologies include multipath and Non-Line-of-Sight (NLOS) links, especially in urban environments. As the Internet of Things emerges many links will be NLOS. However, network protocols are often only evaluated using Line-ofSight radio channels. Previous simulations of the MACGSP6 (Medium Access Control for Gossip-based Sleep Protocol Version 6) protocol demonstrate packet reception rates exceed 90% for networks of more than 1000 nodes with Line-of-Sight conditions. This paper measures the performance of MACGSP6 using a prototype testbed where all links are NLOS. Results demonstrate that MACGSP6 achieved better Average Packet Loss, Average Duplicate Packets and energy consumption than a controlled flooding protocol. Additionally, MACGSP6 made all degraded paths from nodes to sink appear as one ideal hop to the application layer. Therefore, MACGSP6 is an energy and data efficient protocol for Internet of Things networks which include NLOS links.
Keywords: Flooding | Packet loss | Duplicate packets | NLOS | Markov Chains | Testbed
مقاله انگلیسی
8 BFSI-B: An improved K-hop graph reachability queries for cyber-physical systems
BFSI-B: پرس و جوهای قابل دسترسی گراف k قدمی برای سیستم های سایبری فیزیکی-2017
Cyber-physical systems, encompass the real physical space and virtual cyber space for providing advanced service for humans, which together, are also namely Internet of Things. The complex and large scale re lationships among nodes contain the potential information of user, which is required and essential for providing high quality personalized service. Graph is used to represent, make fusion and process the relationships data, which has been used in many domains with traditional small data sets. K-hop reach ability query answering in graphs is seeing a growing number of applications, such as ranked keyword search in databases, social networking, ontology reasoning and bioinformatics. Currently, techniques for efficient evaluation of such queries are based on vertex-cover technology. These methods suffer from a lack of scalability; that is, they cannot be applied to very large graphs. To solve these problems, we pro pose the compound-index method, namely BFSI-B, which uses the special index to decrease the k-hop reachability query time and improve pruning efficiency. The theoretical analysis and experiment results demonstrate that our method has a smaller index size and a faster query time than the k-reach method, in both dense graphs and very large graphs.
Keywords: K-hop reachability queries | Large graph | Online search | BFSI-B
مقاله انگلیسی
9 ساختار مقیاس هوشی وکسلر برای کودکان - نسخه چهارم در یک گروه از کودکان مبتلا به ADHD
سال انتشار: 2016 - تعداد صفحات فایل pdf انگلیسی: 11 - تعداد صفحات فایل doc فارسی: 33
موضوع : این مطالعه تحلیل های فاکتوری تاییدی را برای بررسی ساختار فاکتوری برای 10 هسته ی خرده آزمونهای WISC–IV در یک گروه از کودکان مبتلا به ADHD مورد استفاده قرار می دهند .
مدل : این مطالعه مدل 5 فاکتوره و 4 فاکتوره ی مورب را بررسی استفاده می کنند ، مدل های با مراتب بالاتر از یک فاکتورکلی متوسطه و 4 تا 5 فاکتور اصلی و یا از یک مدل دو عامله (bifactor ) با یک فاکتور کلی و چهار فاکتور اصلی استفاده می کنند .
یافته ها : این نتایج از تمامی مدل های تست شده حمایت می کند . مدل bifactor ، مدل مطلوب و بهینه ای است . برای این مدل ، تنها عامل کلی است که دارایی ناسازگاری های مشترکی است که در ادامه در مورد آن توضیح داده خواهد شد .
نتیجه گیری : به غیر از نمرات شاخص خرده مقیاس ها ، یافته های دیگر ما را برای استفاده از نمرات FSIQ بدست آمده از WISC-IV مساعدت و یاری می کنند .
کلمات کلیدی: WISC-IV | ADHD | ساختار عاملی | مدل bifactor | عملکرد دانشگاهی
مقاله ترجمه شده
10 Safety impacts of platform tram stops on pedestrians in mixed traffic operation: A comparison group before–after crash study
Safety impacts of platform tram stops on pedestrians in mixed traffic operation: A comparison group before–after crash study-2016
Tram stops in mixed traffic environments present a variety of safety, accessibility and transport efficiency challenges. In Melbourne, Australia the hundred year-old electric tram system is progressively being modernized to improve passenger accessibility. Platform stops, incorporating raised platforms for level entry into low floor trams, are being retro-fitted system-wide to replace older design stops. The aim of this study was to investigate the safety impacts of platform stops over older design stops (i.e. Melbourne safety zone tram stops) on pedestrians in the context of mixed traffic tram operation in Melbourne, using an advanced before–after crash analysis approach, the comparison group (CG) method. The CG method evaluates safety impacts by taking into account the general trends in safety and the unobserved factors at treatment and comparison sites that can alter the outcomes of a simple before–after analysis. The results showed that pedestrian-involved all injury crashes reduced by 43% after platform stop installation. This paper also explores a concern that the conventional CG method might underestimate safety impacts as a result of large differences in passenger stop use between treatment and comparison sites, suggesting differences in crash risk exposure. To adjust for this, a modified analysis explored crash rates (crash counts per 10,000 stop passengers) for each site. The adjusted results suggested greater reductions in pedestrian-involved crashes after platform stop installation: an 81% reduction in pedestrian-involved all injury crashes and 86% reduction in pedestrian-involved FSI crashes, both are significant at the 95% level. Overall, the results suggest that platform stops have considerable safety benefits for pedestrians. Implications for policy and areas for future research are explored.
Keywords: Pedestrian safety | Platform tram stops | Mixed traffic operation | Before–after crash study | Comparison group method
مقاله انگلیسی
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