نتایج جستجو برای: electric variable measurement

تعداد نتایج: 819714  

Journal: :علوم 0
محمد اسماعیل عظیم عراقی دانشگاه خوارزمی حمیده اسکندری تربقان hamide eskandari torbaghan باشگاه پژوهشگران جوان

this study presents the electric behavior of sandwich devices based on porous silicon (ps) thin films with au/ps/si/cu structure when the material’s surface is exposed to different gases. ps thin films were fabricated by the electrochemical anodization method of si–c (100) substrates with resistivity 1.4-2.6 ωcm. samples were anodized in a solution of hf (48%), c2h5oh (99.98%) and distilled wat...

A dual mechanical port machine (DMPM) is used as an electrically variable transmission (EVT) in hybrid electric vehicle (HEV). In the conventional HEV, this machine is replaced by a planetary gearbox and two electric machines and makes this structure simpler. This paper presents field oriented control (FOC) for DMPM. For HEV application, drive efficiency and wide operating speed range are impor...

In this paper to assess the environmental efficiency of electric power companies two-stage approach has been used Which means that the first step is to calculate the environmental efficiency score of electric power companies with Slack-Based Measure during the period (2004-2014). Then, the second step various factors effects have been evaluated on environmental efficiency by using Tobit and Ord...

2016
Xueqi Hu Jingang Wang Gang Wei Xudong Deng

In line with the wider application of non-contact voltage transducers in the engineering field, transducers are required to have better performance for different measuring environments. In the present study, the D-dot voltage transducer is further improved based on previous research in order to meet the requirements for long-distance measurement of electric transmission lines. When measuring th...

2010
Nicole Hassoun

Debates about poverty relief and foreign aid often hinge on claims about how many poor people there are in the world and what constitutes poverty. Good measures of poverty are essential for addressing the world poverty problem. Measures of poverty require a basis for determining who is poor and a method of aggregation. Historically, the methods of aggregation were quite simple. The headcount in...

Journal: :Measurement & Control 2022

The article deals with the issue of using Two Degree Freedom (2DOF) PID controller to control an integral system and investigates by simulation experimental measurement what influence it has on course process compared standard controller. controlled plant is represented DC electric motor worm gear its output shaft rotation angle. studies effect added parameters 2DOF dynamics closed-loop control...

2012
M. Hatridge S. Shankar M. Mirrahimi F. Schackert K. Geerlings T. Brecht K. M. Sliwa B. Abdo L. Frunzio S. M. Girvin R. J. Schoelkopf M. H. Devoret

Measuring a quantum system can randomly perturb its state. The strength and nature of this back-action depends on the quantity which is measured. In a partial measurement performed by an ideal apparatus, quantum physics predicts that the system remains in a pure state whose evolution can be tracked perfectly from the measurement record. We demonstrate this property using a superconducting qubit...

Journal: :Kybernetika 2000
Arie Levant

Sliding mode is used in order to retain a dynamic system accurately at a given constraint and features theoretically-in nite-frequency switching. Standard sliding modes are known to feature nite time convergence, precise keeping of the constraint and robustness with respect to internal and external disturbances. Having generalized the notion of sliding mode, higher order sliding modes preserve ...

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