NFPA 252:2017-Standard Methods of Fire Tests of Door Assemblies

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NFPA 252:2017

Standard Methods of Fire Tests of Door Assemblies

Kahoot is the advanced methods of American education

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Kahoot is the advanced methods of American education

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روش نوین تدریس امریکایی و اروپایی 2016

New Methods for Determining Capacity of Bottlenecks on Freeways

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New Methods for Determining Capacity of Bottlenecks on Freeways

Rahim F. Benekohal - Professor of Civil and Environmental Engineering University of Illinois at Urbana-Champaign
Hani Ramezani - Graduate Research Assistant University of Illinois at Urbana-Champaign

چکیده مقاله:

Accurate determination of capacity of bottlenecks is essential for proper traffic management in and around bottlenecks. Restrictions in roadway geometry or traffic composition, or implementation of new operational policies may create a chock-point on a freeway. Regardless of the cause of bottleneck, the effects are often congestion, queue, and increase in travel time. Bottlenecks may also create unsafe driving conditions and may increase the chance of rear-end collisions. This paper presents two new methodologies for finding bottleneck (i.e. work zone) capacity and operating speed: Four-Regime Models (FRM) and Updated Highway Capacity Manual (UHCM). The paper briefly discusses the factors affecting speed and capacity, and then compares the values estimated by the two methods for four different real-world work zone scenarios. The scenarios cover different speed limits, presence of flagger, and work activity levels. The results showed that FRM estimated values for speed and capacity represent the conditions more accurately than UHCM results because the FRM directly considers the presence of flagger and work activity, but UHCM does not.

کلیدواژه‌ها:

freeway, bottleneck, work zone, capacity, four-regime speed flow, congestion, queue

دانلود پاورپوینت انگلیسی 35 اسلایدی Operational research methods and examples

اختصاصی از هایدی دانلود پاورپوینت انگلیسی 35 اسلایدی Operational research methods and examples دانلود با لینک مستقیم و پر سرعت .

•"Defaulting from anti-tuberculous treatment in a teaching hospital in Rio de Janeiro, Brazil" (IJTLD 2004)

•"A concurrent comparison of home and sanatorium treatment of PTB in South India" (BWHO 1959)

•" 'Lost' smear positive PTB cases: where are they and why did we lose them?" (IJTLD 2005)

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IEC 60243:2013-Electric strength of insulating materials – Test methods – Part 3: Additional requirements for 1,2/50 μs impulse

اختصاصی از هایدی IEC 60243:2013-Electric strength of insulating materials – Test methods – Part 3: Additional requirements for 1,2/50 μs impulse tests دانلود با لینک مستقیم و پر سرعت .

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IEC 60243:2013-Electric strength of insulating materials – Test methods – Part 3: Additional requirements for 1,2/50 μs impulse tests