نتایج جستجو برای: electric switch
تعداد نتایج: 201965 فیلتر نتایج به سال:
the possibility of terahertz generation has been investigated from a photoconductive switch based on gaas, gated by a femtosecond laser. the emission properties of photoconductive antenna (pca) with low-temperature-grown (lt) gaas have been studied. in such gaas materials presence of the charged defects induces a redistribution of the electric field between the antenna electrodes. this effect h...
بررسی خواص الکترونیکی و آنالیز ساختاری این مشتق از خانواده 1,2-dithienylcyclopentene وجود 3 حالت مشخص در این مولکول را اثبات نمود و نشان داد که خواص الکترونی این 3 حالت با یکدیگر متفاوت می باشد این تفاوت در خواص الکترونی از جمله شکاف بین باند هدایت و باند ظرفیت، قطبش پذیری و ... تفاوت در هدایت الکتریکی را به همراه داشت. همچنین محاسبات نشان داد که هر 3 حالت این ملکول، خواص سوئیچ بودن را از خود ن...
Switches can do some really odd things. Most engineers learn this dirty little secret soon after connecting a switch or a relay to a digital system. Switches don't make and break cleanly on the time scales of digital systems. Instead, a typical switch makes multiple transitions during the tens of milliseconds required to open or close, due to effects that include age, operating inertia, mechani...
Implementation of hydrogen storage systems requires moderate bonding strength. However, this goal has remained a challenge, either due to the weak physisorption or extremely strong chemisorption. Here, we report on a new phenomenon, namely that H2 binding can be externally enhanced (or weakened) via superimposition of a positive (or negative) electric field. We demonstrate this concept using an...
We report that by applying an electric field to a single squaraine-derived rotaxane (SR) molecule on bare glass, the fluorescence can be completely quenched. The molecule undergoes a reversible fluorescence switch between a zero-field "on" state and a high-field "off" state, which is attributed to intramolecular electron transfer within the SR molecule.
the purpose of the present study is to find out whether bilinguals of khuzestan-arab origin or monolinguals of iranian origin code-switch during learning or speaking english and which group is more susceptible to code-switch. to this end, the students of 24 classes from high schools and pre- university centers were screened out, and interviewed and their voices and code-switchings were recorded...
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