نتایج جستجو برای: dcf

تعداد نتایج: 1596  

Journal: :Chemosphere 2017
Yue Zhao Fei Liu Xiaopeng Qin

The adsorption of diclofenac (DCF), one of the widely used non-steroidal anti-inflammatory drugs, onto the surface of goethite was investigated with batch experiments. The adsorption at different pH values (5.3, 7.4, and 10.0) were well fitted with the pseudo-second-order model. The results showed that the adsorption of DCF onto goethite was strongly depended on solution pH. The amount of adsor...

2015
A. Bojanowska-Czajka G. Kciuk M. Gumiela S. Borowiecka G. Nałęcz-Jawecki A. Koc J. F. Garcia-Reyes D. Solpan Ozbay M. Trojanowicz

The radiolytic decomposition of the drug diclofenac (DCF), and in limited extent, also two other widely used drugs, ibuprofen and carbamazepine, was examined using liquid chromatography (LC) methods. The efficiency of DCF decomposition was examined in function of the absorbed dose of gamma radiation, and also in the presence of selected scavengers of radicals, which are commonly present in natu...

Journal: :JNW 2006
Mikyung Kang Junghoon Lee Yongmoon Jin Gyung-Leen Park Hanil Kim

This paper proposes and analyzes the performance of a prioritized error control scheme for time sensitive application on the wireless sensor network. As a modified version of IEEE 802.11 WLAN, the proposed scheme further divides DCF into H-DCF and L-DCF without changing PCF, aiming at maximizing the successful retransmission of a packet that carries critical data. While channel estimation elmin...

ژورنال: مهندسی معدن 2012

سال‌هاست که روش رایج در ارزشیابی اقتصادی پروژه‌ها و از جمله پروژه‌های معدنی، روش جدول جریان وجوه تنزیل شده (DCF) است. در این مقاله از روشی مبتنی بر نظریه‌ی اختیارات حقیقی(RO)  در ارزشیابی پروژه های آماده سازی معدنی استفاده شده است. حدود سه دهه است که دیدگاهی جدید به نام اختیارات حقیقی وارد دنیای ارزیابی مالی پروژه‌های سرمایه‌گذاری شده است. مزیت‌های این دیدگاه و یا نظریه نسبت به روش DCF، در نظر ...

Abstract Introduction: Gastric cancer is the fourth common cancer and the second leading cause of cancer death worldwide. Due to lack of adequate information on the side effects of chemotherapy regimens in treatment of gastric cancer, this study was aimed to determine the side effects of two common chemotherapy regimens of gastric cancer. Methods: This prospective study was conducte...

2013
A Kazmierczak

Wireless networks are becoming more and more common in today’s networking environment. One of the earliest of the IEEE standards for wireless networks is the IEEE 802.11 standard. Most communications in an 802.11 network use the Distributed Coordination Function (DCF). Unfortunately, the 802.11 DCF was not designed with Quality of Service (QoS) in mind. However, as more and more applications te...

2007
Bum-Gon Choi Hyung Joo Ki Min Young Chung Tae-Jin Lee

The IEEE 802.11 standard basically uses a DCF (Distributed Coordination Function) to access a wireless channel. However, the DCF uses wireless resource ineffectively when there are many contending stations and a high bit error rate. To enhance the performance of the wireless LAN, Ki et al. proposed a Binary Negative-Exponential Backoff (BNEB) algorithm. We found that the performance of the BNEB...

2013
Solmaz S. Kia Jorge Cortes Sonia Martinez

This paper proposes two continuous-time dynamic average consensus filters for networks described by balanced and weakly-connected directed topologies. Our distributed filters, termed 1st-Order-Input (FOI-DCF ) and 2nd-OrderInput Dynamic (SOI-DCF ) Consensus Filters, respectively, allow agents to track the average of their dynamic inputs within an O(ǫ)-neighborhood. The convergence results and s...

Journal: :ITM web of conferences 2022

We present a novelty optoelectronic delay double-cross-feedback (OD-DCF) scheme to control two chaotic lasers based on coupled lasers. design out the OD-DCF technical solution convert lights from into photocurrents by photo-detectors, and then are cross-fed back each other’s respectively suppress oscillations guide laser’s dynamics behaviours, respectively. By adjusting feedback levels delayed ...

2013
Irina Epold Niina Dulova Marina Trapido

Background: Pharmaceuticals have arisen as emerging environmental pollutants due to their potential impact on humans, animals and microorganisms even at low concentrations. Conventional wastewater treatment plants are known to be ineffective for removal of many pharmaceuticals present in wastewater. Advanced oxidation processes are one of the most promising treatment technologies for degradatio...

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