نتایج جستجو برای: q43 e22
تعداد نتایج: 608 فیلتر نتایج به سال:
چکیده افزایش بهرهوری انرژی به منظور صرفهجویی در هزینههای دولت در کشورهای صادرکننده نفت مانند ایران حائز اهمیت فراوان است. بهبود در بهرهوری انرژی تحت تأثیر قیمت انرژی، سرمایهگذاری و روند ارزش افزوده بخشهای اقتصادی است. در این مقاله شدت و میزان تأثیرگذاری متغیرهای جهت دهنده بر نرخ رشد بهرهوری انرژی در منتخبی از کشورهای عضو اوپک طی سالهای ۲۰۰۰-۲۰۱۱ مورد آزمون قرارگرفته است. متغیر قیمت انر...
A considerable body of economic literature shows the adverse economic impacts of oil-price shocks for the developed economies. However, there has been a lack of empirical study of this kind on China and other developing countries. This paper attempts to fill this gap by answering how and to what extent oil-price shocks impact China’s economy, emphasizing on the price transmission mechanisms. To...
We present a thorough analysis of one- and two-color transient absorption measurements performed on single- and double-walled semiconducting carbon nanotubes. By combining the currently existing models describing exciton-exciton annihilation-the coherent and the diffusion-limited ones-we are able to simultaneously reproduce excitation kinetics following both E11 and E22 pump conditions. Our sim...
For the single-walled carbon nanotubes, the higher values of anti-Stokes/Stokes Raman intensity ratio (Ias/Is) then the predictions of the Maxwell-Bolzmann formula indicates a CARS emission resulting from a wave mixing process between the incident laser light (ωl) and Stokes Raman light (ωs) generated by a SERS mechanism . The weaker value of (Ias/Is) observed at resonant excitation of semicond...
Emerging evidence supports that premature infants are susceptible to both cerebral white and gray matter injury. In a fetal rabbit model of placental insufficiency, preterm rabbits at embryonic day 22 (E22) exhibited histologic evidence of gray matter injury but minimal white matter injury after global hypoxia-ischemia (H-I). We hypothesized that the dissociation between susceptibility to gray ...
401-0252-00 U Mathematik II: Analysis II und Lineare Algebra und Systemanalyse I Di 8-10 für Studiengang Agrarwissenschaft bzw. Lebensmittelwissenschaft. Do 9-11 oder Do 15-17 für Studiengang Erdwissenschaften. Do 13-15 für Studiengang Umweltnaturwissenschaften. 2 hrs Tue 08-10 CAB G52 HG E1.2 HG E22 HG E33.3 HG F26.3 Thu 09-11 HG E21 HG E22 13-15 HG D7.2 HG E22 HG F26.5 LFW E13 LFW E15 15-17 H...
We have studied intersubband decay of E22 excitons in semiconducting carbon nanotubes experimentally and theoretically. Photoluminescence excitation line widths of semiconducting nanotubes with chiral indicess (n,m) can be mapped onto a connectivity grid with curves of constant (n - m) and (2n + m). Moreover, the global behavior of E22 line widths is best characterized by a strong increase with...
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