نتایج جستجو برای: and hydrocarbons hc thus
تعداد نتایج: 16837405 فیلتر نتایج به سال:
Background and Objective: Due to the increasing growth of urbanization, vehicles are one of the most important environmental causes of air pollution in today's world.. With the increasing problems of air pollution and its environmental consequences due to lack of compliance with standards in manufacturing cars and their fuel consumption, awareness of the exhaust of cars and its comparison with...
One of the major technological challenges for the transport sector is to cut emissions of particulate matter (PM) and nitrogen oxides (NOx) simultaneously from diesel vehicles to meet future emission standards and to reduce their contribution to the pollution of ambient air. Installation of particle filters in all existing diesel vehicles (for new vehicles, the feasibility is proven) is an effi...
today, persian poetry is of great importance to many scholars around the world. the interest and attention of various cultures toward such a fine literature has given quite a good motivation for a comparative study. the major concern of the study is to investigate how nature is depicted through the works of the great english poet, william wordsworth (1770-1850) and the outstanding contemporary ...
Mexico to monitor remotely the carbon monoxide (CO), hydrocarbons (HC) and nitric oxide (NO) emissions of the local vehicle fleet. In four days of monitoring at four different locations within the city, 26,534 vehicles passed the sensor. In all more than 24,000 valid measurements were obtained for CO, more than 23,000 for HC and more than 16,000 for NO. Mean values for each species were 1.69% C...
The project of organizing mineral-and-energy clusters with spatial conjugation deposits solid minerals (SM) and hydrocarbons (HC) localized on the continental margin shelf Arctic zone Russian Federation is substantiated. Four kind are characterized, i.e.: Murmansk-Barents, YamalNorilsk, Lena-Laptev Sea Northeast-Chukotka, corresponding characteristics SM HC resource bases, as well substantiatio...
peace and national security protection and ironic solving of international conflicts become the preliminary foundation of the united nations charter and had been considered as the main responsibilities of the security council, after world war ii and the establishment of united nations organization. therefore, the security council enables to analyze every kind of conflicts and challenges which ...
the present study reports an analysis of response articles in four different disciplines in the social sciences, i.e., linguistics, english for specific purposes (esp), accounting, and psychology. the study has three phases: micro analysis, macro analysis, and e-mail interview. the results of the micro analysis indicate that a three-level linguistic pattern is used by the writers in order to cr...
the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...
This study focuses on the performance of Ag/Al2O3 catalysts for hydrocarbon selective catalytic reduction (HC-SCR) of NOx under lean conditions, using complex hydrocarbons as reductants. The aim is to elucidate the correlation towards the silver loading and morphology, with respect to the nature of the reductant. Ag/Al2O3 samples with either 2 or 6 wt% silver loading were prepared, using a sol–...
abstract due to the growing importance and influence of the self of the teacher in the field of educational and cognitive psychology, the current study intended to investigate the relationship between three teacher qualities and characteristics, i.e. teacher self efficacy, self regulation, and success as perceived by their learners. the study aimed at finding whether teacher self efficacy an...
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