نتایج جستجو برای: marine system
تعداد نتایج: 2313691 فیلتر نتایج به سال:
Monitoring of marine ecosystems is essential to identify the parameters that determine their condition. The data derived from the sensors used to monitor them are a fundamental source for the development of mathematical models with which to predict the behaviour of conditions of the water, the sea bed and the living creatures inhabiting it. This paper is intended to explain and illustrate a des...
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
در این مطالعه توالی های رسوبی کرتاسه میانی در برش های سطحی خوش و خمیر و چاه نمک غربی 1 در منطقه بندرعباس مورد بررسی قرار گرفته است. ناحیه مذکور به صورت یک نقطه سه گانه تحت تاثیر نواحی عمان، مکران و زاگرس قرار گرفته است. با توجه به اینکه در منطقه مورد مطالعه رخنمون های کرتاسه بطور گسترده مشاهده نشده است، مطالعات زیر سطحی جهت تطابق و بازسازی هندسه چینه های زیرسطحی منطقه مورد مطالعه اهمیت بسزایی د...
Nowadays seas and oceans are exposed to serious threats such as land-based sources of marine pollution, the overexploitation of living marine resources, the physical alteration or destruction of the marine habitat and the horizontal transfer of marine species to new environments in ballast water. When marine species are introduced into new environments and the living conditions there are favora...
The appropriate configuration of marine reserves for maximizing harvests or ensuring species persistence when there is uncertainty or variability in larval dispersal patterns is not completely understood. This is particularly true in environments with large alongshore advection rates, as the success of a system of marine reserves depends on connectivity through larval and/or adult dispersal bet...
In this paper it is presented a volcanic seismic acquisition equipment that has been developed together with an energy harvesting system, based on piezoelectric elements, in order to work in autonomous conditions. The energy harvesting system has been developed to convert the wind or marine currents energy into electrical energy through a new method based on piezoelectrics. For the deployment o...
Original scientific paper Unexpected severe hull deformation caused by the wave loads would significantly influence the dynamical behaviours of the propulsion system in large scale ships, resulting in degradation of the ship control performance. A new global sliding model control (GSMC) for marine water-hull-propulsion unit systems is proposed to obtain more accurate control performance in this...
153 گونه جلبک از سواحل خلیج فارس و دریایی عمان لیست می شود. که 87 گونه آن (48 رودوفیت، 16 فئوفیت، 18 کلروفیت، 3 اگزوانتوفیت و 2 سیانوفیت) گزارش های جدیدی برای فلور جلبکی ایران می باشند. در 16 مورد نیز نام برخی از گونه های که در گزارش هایی قبلی آمده اند تصحیح شده است.
the aim of this research was to optimize bioremediation of seawater samples spiked with 1000 mg/l crude oil for removal of n-alkanes (c12h26 to c34h70). bioaugmentation experiments were performed at laboratory scale: each bioreactor contained 250 ml dispersed crude-oil-contaminated seawater, indigenous acclimatized microorganism and nitrogen and phosphorus at concentrations based on central com...
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