نتایج جستجو برای: level clipping

تعداد نتایج: 1084941  

2017
Byung Moo Lee Youngok Kim

Large-scale (LS) multi-user (MU) multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) is considered to be a desirable signal transmission scheme because it can significantly improve the energy efficiency (EE) and spectral efficiency (SE) of the system. However, there are many difficulties in realizing an LS-MU-MIMO-OFDM system, and one of these is its high peak-...

2014
Zhimin Du Yan Xie Liqun Hu Longxing Hu Shendong Xu Daoxin Li Gongfang Wang Jinmin Fu

Grassland managements can affect carbon (C) and nitrogen (N) storage in grassland ecosystems with consequent feedbacks to climate change. We investigated the impacts of compound fertilization and clipping on grass biomass, plant and soil (0-20 cm depth) C, N storage, plant and soil C: N ratios, soil microbial activity and diversity, and C, N sequestration rates in grassland in situ in the Natio...

Journal: :anesthesiology and pain medicine 0
zahid hussain khan department of anaesthesiology and intensive care, faculty of medicine, tehran university of medical sciences, tehran, iran; department of anaesthesiology and intensive care institution, imam khomeini hospital complex, tehran university of medical sciences, keshavarz blv. tehran, iran. tel: +98-2161192828, fax: +98-2166581537 shahram samadi department of anaesthesiology and intensive care, faculty of medicine, tehran university of medical sciences, tehran, iran sanaz ameli department of anaesthesiology and intensive care, faculty of medicine, tehran university of medical sciences, tehran, iran cyrus emir alavi department of anaesthesiology and intensive care, anaesthesiology research center, faculty of medicine, guilan university of medical sciences, rasht, iran

conclusions although propofol remains a standard agent for such types of surgeries, lidocaine proved equally effective and coupled with its low cost, minimal side effects and omission of other hypnotic agents was a plausible induction agent and a maintenance drug in the selected cases. case presentation lidocaine was applied as the sole anaesthetic for induction and maintenance during aneurysm ...

2014
Jing Rui Tang Nor Ashidi Mat Isa

This paper presents an adaptive contrast enhancement algorithm with details preserving (ACEDP) to enhance gray-scale image. Initially, the input image is classified into low-, middleor high-level image based on the gray-level distribution of maximum number of pixels. The proposed ACEDP algorithm assigns different plateau functions for different type of image and histogram clipping is then perfo...

ژورنال: علوم آب و خاک 2000
بصیری, مهدی , ولی, عباسعلی ,

Artemisia is the major component of the vegetation of a large portion of arid lands in Iran. Determining the utilization rate is an essential element in the management of these rangelands. Methods of determining the utilization regime for woody plants and shrubs include clipping and weighing, reference unit, ocular estimate, twig length, branch diameter and production index. These methods wer...

2017
Amrita Soni

-orthogonal frequency division multiplexing (OFDM) is multicarrier technique for high data transmission rate commonly used in 4G communication these days also used in digital video broadcasting (DVB) and many more application when ever high data transmission rate is required. The main problem of OFDM is high Peak-to-average power ratio because OFDM is highly sensitive to non-linear region of hi...

2006
Haris GACANIN Fumiyuki ADACHI

Abstract: Recently, we proposed OFDM combined with time division multiplexing (OFDM/TDM) to alleviate the high peak-to-average power ratio (PAPR) problem of OFDM. To further reduce the PAPR, amplitude clipping can be used. However, the bit error rate (BER) performance degrades and the out-of-band (OoB) power spectrum grows. Therefore, filtering is necessary to suppress the OoB power growth, but...

A. A. Nekooeian, T. Mashhoodi

The objective of this study was to determine the chronology of changes in blood pressure in renalhypertension induced by solid plexiglass clips in rats. Saw blades with the thickness of 0.21-0.22 mm wereused to make clips sized 4 × 2 × 2 mm from a piece of 2-mm thick plexiglass. Rats were subjected to shamoperation or left renal arterial clipping, and 1, 2, 3 and 4 weeks later blood pressure, a...

2007

Persistence, reliability and individual discrimination are essential components for animal marking systems used in behavioural ecology studies. Toe-clipping is the most established marking technique for lizards, but current threats to native populations leave some researchers questioning the use of invasive field techniques. In particular, the effects of toe-clipping on juveniles are not well u...

Journal: :Stroke 1970
R M Crowell Y Olsson I Klatzo A Ommaya

Alntract: Temporary Occlusion of the Middle Cerebral Artery in the Monkey: Clinical and Pathological Observations • The right middle cerebral artery (MCA) was exposed in monkeys via a retro-orbital microsurgical approach. In 43 animals a temporary occlusive clip was placed on the MCA origin for one to 24 hours. In 20 animals, the origin of the MCA was permanently occluded. Clinical evaluation o...

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