نتایج جستجو برای: نانوکریستال cus
تعداد نتایج: 1352 فیلتر نتایج به سال:
The main objective of this two part paper is to formulate and address the problem of distributed uplink resource allocation in multi-carrier cognitive radio networks (CRN) with multiple Access Points (APs). When the APs operate on non-overlapping spectrum bands, such problem is essentially a joint spectrum decision and spectrum sharing problem. In this network, the cognitive users (CUs) are end...
پوشش های نانوکریستال کبالت-فسفر تولید شده به روش رسوبدهی الکتریکی با جریان پالس به علت ویژگی های قابل توجه اخیراً مورد توجه قرار گفته اند. در تحقیق حاضر پوشش نانوکریستال کبالت-فسفر با انتخاب ترکیب مناسب حمام به روش رسوبدهی الکتریکی با جریان مستقیم تولید شد. پس از بررسی چگالی جریان پوشش دهی در محدوده 150 تا ma/cm2250 بر ویژگی-های مختلف پوشش مشخص گردید که با افزایش چگالی جریان در صد وزنی فسفر پوشش...
Prevention of authorized users from interference determine the accurate detection Spectrum Hole (SH) is great importance in a Shearing Network (SSN). However, multipath fading and shadowing affect SH resulting interference. Cluster-Based Cooperative Detection (CBCSHD) used to address this problem depends on detector number clusters. Hence, comparative analysis blind detectors CBCSHD carried out...
Abstract. We investigate the representation of Canary upwelling system (CUS) in six global coupled climate models operated at high and standard resolution as part High Resolution Model Intercomparison Project (HighResMIP). The models' performance reproducing observed CUS is assessed terms various indices based on sea surface temperature (SST), wind stress, height, focusing effect increasing mod...
The affinity towards water of a selection of well-defined, nanostructured hydroxyapatite (HA) samples was investigated by H(2)O vapour adsorption microcalorimetry and infrared (IR) spectroscopy. A large hydrophilicity of all investigated materials was confirmed. The surface features of hydrated HA were investigated on the as-synthesized samples pre-treated in mild conditions at T=303 K, whereas...
مواد نانوکریستال در مقایسه با مواد پلی کریستال درشت دانه ی معمولی، رفتار و ویژگی های منحصربفردی نشان می هند که از آن جمله می توان به ذوب شدن در دماهایی پایین تر اشاره نمود. منشأ اصلی این تفاوت رفتاری با پلی کریستال های درشت دانه، وجود کسر حجمی بالای نواحی مرزدانه ای در مواد نانوکریستال است. از آنجاییکه این نواحی مرزی دارای ساختار و وضعیت های انرژی متفاوت با دانه هستند، بررسی ویژگی های مواد نانو...
Device-to-device (D2D) communications allows two adjacent mobile terminals transmit signal directly without going through base stations, which has been considered as one of the key technologies for future networks. As full-duplex (FD) can improve performance (i.e., throughput, energy efficiency (EE)) systems, it is commonly used in practical D2D scenarios. However, FD-enabled also results self-...
Stress facilitates drug abuse by humans. In rodents, stress enhances the neurochemical, neuroendocrine, and behavioral responses to psychostimulants. Although chronic unpredictable stress (CUS) enhances the acute hyperthermic and long-term monoamine-depleting effects of the psychostimulant +3,4-methylenedioxymethamphetamine (MDMA), the roles of hyperthermia and corticosterone (CORT) in mediatin...
BACKGROUND Few cUS studies of cerebral measurements are available for normal term infants. Normative data is important for evaluating cerebral structure size in symptomatic term infants and assessing preterm brain growth by term age. OBJECTIVES To (i) make linear measurements using cranial ultrasound (cUS) for major cerebral structures and intracranial spaces in normal newborn term infants, (...
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