نتایج جستجو برای: photoelectric device

تعداد نتایج: 684988  

2009
D. Rubin S. Hony S. C. Madden A. G. G. M Tielens

Context. Photoelectric heating is a dominant heating mechanism for many phases of the interstellar medium. We study this mechanism throughout the Large Magellanic Cloud (LMC). Aims. We aim to quantify the importance of the [C ii] cooling line and the photoelectric heating process of various environments in the LMC and to investigate which parameters control the extent of photoelectric heating. ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده فنی 1391

با پیشرفت و همگانی شدن کامپیوترها، نیاز برای انتقال داده به کامپیوترها افزایش پیدا کرد. پورت ها وسیله ای برای ارتباط با device های جانبی متنوع از جمله کیبورد، میکروفون و ... هستند. با گذشت زمان پورتها به منظور پشتیبانی از گستره وسیعی از device ها، پیشرفته تر و کابردی تر شدند. با روی کار آمدن پورت usb دراواسط دهه 1990، این پورت توانست جایگزین سایر پورت های موجود شود چراکه این پورت ها به تنوع نا...

2010
Lianming Xia Xiangyou Wang Duanyang Geng Qingfeng Zhang

Based on full consideration of the working conditions in the filed, a monitoring system for precision planter was designed using the technology of sensor, single-chip Microcomputer and wireless transmission. In this system, photoelectric sensor and MSP430 were used to detect the performance of the seeder-metering device and process the data respectively. It mainly detected the miss index, multi...

Journal: :The Journal of General Physiology 2003
T. J. B. Stier W. Arnold J. N. Stannard

A device for quickly and accurately measuring the population density of a suspension of microorganisms, permitting the preparation of yeast suspensions of known density to within 1 per cent error, was constructed with two Visitron photoelectric cells, a single light of high intensity and a good Wheatstone bridge for balancing the currents from the two photoelectric cells. A large Pyrex milk cul...

2015
Yong Zhao Jin Yu Li-Guang Fang Jun Zheng Hui-Qin Wang Ji-Ren Yuan Shaolong Wu Guo-An Cheng

Semiconductor nanowire photoelectrochemical cells have attracted extensive attention in the light-conversion field owing to the low-cost preparation, excellent optical absorption, and short distance of carrier collection. Although there are numbers of experimental investigations to improve the device performance, the understanding of the detailed process of photoelectric conversion needs to be ...

2014
Patrick T. McCarthy Ronald G. Reifenberger Timothy S. Fisher

*Correspondence: Timothy S. Fisher , Birck Nanotechnology Center, 1205 West State Street, West Lafayette, IN 47907, USA e-mail: [email protected] This article describes advances in thermionic and photo-emission materials and applications dating back to the work on thermionic emission by Guthrie (1873) and the photoelectric effect by Hertz (1893). Thermionic emission has been employed for elec...

2015
Sang Gook Kim Harry Tuller

Photoelectric hot carrier generation in metal-semiconductor junctions allows for opticalto-electrical energy conversion at photon energies below the bandgap of the semiconductor. Which opens new opportunities in optical sensors and energy conversion devices. In this thesis research, the wafer-scale metallic-semiconductor photonic crystal (MSPhC) has been designed for photoelectric hot electrons...

2012
Hanshan Li Zhiyong Lei Zemin Wang Junchai Gao

To improve measurement precision and solve the question on projectile information extraction when projectile go through detection screen of photoelectric detection target, the wavelet analysis method was applied to process its information and look for its starting time in screen. The detection principle of photoelectric detection target was analyzed, the characteristic of wavelet analysis metho...

Journal: :CoRR 2014
Brian Tracey Eric L. Miller

Recent years have seen growing interest in exploiting dualand multi-energy measurements in computed tomography (CT) in order to characterize material properties as well as object shape. Materials characterization is performed by decomposing the scene into constitutive basis functions, such as Compton scatter and photoelectric absorption functions. While well motivated physically, the joint reco...

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