Amir Hashemi

ORCID: 0000-0002-0185-0942
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Luminescence Properties of Advanced Materials
  • Spectroscopy and Laser Applications
  • Gas Sensing Nanomaterials and Sensors
  • Advanced Semiconductor Detectors and Materials
  • Photonic and Optical Devices
  • Advancements in Semiconductor Devices and Circuit Design
  • Inorganic Fluorides and Related Compounds
  • Thermography and Photoacoustic Techniques
  • Optical Network Technologies
  • Advanced Sensor Technologies Research
  • Wastewater Treatment and Reuse
  • Calibration and Measurement Techniques
  • Coagulation and Flocculation Studies
  • Photonic Crystals and Applications
  • Radio Frequency Integrated Circuit Design
  • Analog and Mixed-Signal Circuit Design

Friedrich-Alexander-Universität Erlangen-Nürnberg
2017

Bavarian Center for Applied Energy Research
2015

Amirkabir University of Technology
2007-2008

Temperature-sensitive phosphors offer an option of accurate contactless temperature measurement. The method can be applied to a wide range and up more than 1500 K. In the current paper, phosphor thermometry based on four rare earths doped in YAG was studied. standard excitation thermographic is carried out with Nd : laser often at 355 or 266 nm. We examined dependent luminescence wavelength 405 visible blue light offers two main advantages: sources are rather cheap they involve less safety...

10.1088/0957-0233/26/7/075202 article EN Measurement Science and Technology 2015-06-05

In this paper, we present dual-channel lock-in phosphor thermometry, which offers an option of accurate and contactless temperature determination under high environmental noise. We studied YAG:Dy as thermographic at excitation wavelength 405 nm. tested our approach different experimental conditions with noise levels about 550, 1060 2190 times larger than the signal. With setup, were able to suppress strong in all cases reliably determine surface using optical measurements (error < 10 K)....

10.1088/1361-6501/aa5010 article EN Measurement Science and Technology 2016-12-19

In this investigation, we present a surface temperature determination method based on the luminescence characteristics of Ba3MgSi2O8:Eu2+, Mn2+. Simple optics utilizing only one RGB scientific CMOS camera makes measurement technique easily applicable. Four different imaging methods were developed and are presented together with corresponding calibration curves. We successfully utilized to take distribution image glass plates point heat source between them.

10.1088/1361-6501/aa8fb7 article EN Measurement Science and Technology 2017-09-28

When a transistor operates in dc mode, the resistance of each contact causes voltage drops along contact. Therefore, different points on contacts will have voltages. So distributing to slices, here called subtransistors, slice drain-source and gate-source voltages consequently small signal parameters from others. Also input lumped alter variations This paper presents effects resistances MESFET distributed subtransistors.

10.1109/edssc.2007.4450105 article EN IEEE Conference on Electron Devices and Solid-State Circuits 2007-01-01

A novel exponential structure has been presented for increasing net gain of optical amplification inside silicon-on-insulator (SOI) waveguides. The stimulated Raman scattering (SRS) simulated using FDTD method. simulation results the proposed have compared with both analytical and experimental previous works.

10.1109/nctt.2008.4814229 article EN 2008-08-01

هدف از این بررسی، مقایسه ماده منعقد کننده پلی آلومینیوم کلراید PACl)) با فریک، بهینه سازی فرآیند و بررسی استفاده توأم آن بنتونیت بر بازدهی  کدورت همچنین میزان باقیمانده مصرف PACl در آلوم آب خام تهران، بوده است. راستا، نمونه هایی ورودی به تصفیه خانه جلالیه تهران برداشته شد. فاز اول آزمایش جار، غلظتهای دو فریک کلرایدمقایسه غلظت برای حذف کدورت، کلرید mg/L 40 35 بدست آمد.  دوم، اضافه کردن (به 20 میلی گرم لیتر)،   کاربرد  و ترتیب 25 15 کاهش یافت. نتایج حاصل سوم نشان داد که یون PACl، آلوم، یافته...

10.22061/tej.2008.1311 article FA DOAJ (DOAJ: Directory of Open Access Journals) 2008-12-01
Coming Soon ...