Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userنمذجة و محاكاة حركة المركبات المنعطفة يساراً على التقاطعات الطرقية المضبوطة بإشارات ضوئية
1025
2 25
0
(
0
)
Authors
نبيل غازي الهزيم( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
تهدف هذه الدراسة إلى بناء نموذج محاكاة على الحاسب الشخصي لمحاكاة حركة المركبات المنعطفة يساراً و ذلك على التقاطعات الطرقية المضبوطة بإشارات ضوئية (برنامج بطورين). آما تهدف إلى تحليل عدة حالات مرورية و إظهار نتائج الحسابات الخاصة لتحديد قيم عوامل الاستفادة من حارة المرور و تحديد قيم عوامل تأثير الانعطاف اليساري. كل هذا باستخدام تقانة المحاكاة و نظرية الطوابير. كل الافتراضات المطلوبة لبناء النموذج تم الحصول عليها من مراقبة سلوك السير العادي على عدة تقاطعات طرقية في مدينة دمشق.
No English abstract
References used
Blaise, Simulation, Programming Techniques, vol: 2 Mc Grow-Hill book. Comp. 1984
Brigges T., Time headway on crossing the Stop-line after queuing at traffic lights. Traf. Eng. Cont. 1977
Hewitt R.H., Measuring of a critical gap. Transp. Scien. vol: 17 - 1983
rate research
Read More
Evaluation of present and future traffic situation is carried out for estimating the level of service through a lot of traffic indicators (such as Saturation Flow, capacity, delay and travel time), but all these indicators are based primarily on the
measurement of Passenger Car Unit (PCU) .This paper analyzes the impacts of
four different types of vehicles on the capacity of signalized intersections. Data was collected at five intersections in Damascus city, and estimates of mean headways associated with four different types of vehicles, as well as passenger cars. Using the estimated headways, Passenger Car Equivalents (PCEs) were
calculated, and these suggest that the impacts of these types should be given special consideration when analyzing the capacity of signalized intersections.
The evaluation of the capacity of signalized intersections is one of the most important
parameter used in the planning, design, operation and management of urban street
networks. The calculation of capacity depends on the estimation of the saturati
on flow of
the signalized intersections.
The highway Capacity Manual (HCM 2010) is used to estimate and analyze the saturation
flow. This method is widely used in many countries around the world, including Syria. It
reflects the local conditions in the United States of America; therefore it may not be
suitable for use in our local conditions.
This study includes estimation of the field saturation flow depending on the headways
between the vehicles in the queues, and comparing the field results of the saturation flow
with the values resulting from using the HCM. The study was conducted on three
intersections in the Tartous city. The analysis was based on data collection using video.
The final results confirmed that there is a clear difference between the field measurement
of the saturation flow and computation value, Which confirms that it cannot be used for
our local conditions.
The provision of adequate drainage and the accompanying problem of
accumulation of salt in soil have plagued irrigated agriculture for
centuries. Soil salinity is one of the major problems in arid and semi-arid
zones. In Euphrates valley the high
groundwater level and its high
evaporation rate caused a serious salinity problem. This study was aimed
to allocate the dangerous areas in terms of high water level resulted from
the recent and expected activities. Drainage wells will be drilled at these
areas in order to lower the groundwater level and prevent further soil
salinity.
The simplified dynamic mathematical model of hybrid stepper motor was studied in this
research. The aim was to simplify the study and to concentrate on certain topic of this subject.
The mathematical model which describes their mechanical and elect
rical dynamic behavior of
the mentioned motor was done. Whereas, the mechanical model can be derived by Newton law,
and electrical model can be derived by Kirchhoff law depending on the electrical equivalent
circuit to each phase.
The quick consuming of products and the strong competition
between producers caused to increase the complexity of products, so
the digital factory became a need between design and producing
actually to achieve a production system with a shorter ti
me and
optimal design and parameters without engineering modifications.
This research offering a reference model basing on a complete
framework between the engineering applications to build a
computational model with a single core based on the integration
between three dimensions modeling and automation of application
for digital factory concept, to optimize the design of achieving the
ideal execution of actual production system. Where we achieved the
control of three-dimensional computer model according to process
automation exactly as in actual through integrating tools, where the
percentage of exact between the real factory and digital factory was
83% by using the time of process as the main factor for comparison
in this evaluation.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
