The paper continues a series of works that aimed to achieves a maximal energy efficiency of ultrasonic action to different technological mediums by means of optimization of matching between electronic generators and u...
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The paper continues a series of works that aimed to achieves a maximal energy efficiency of ultrasonic action to different technological mediums by means of optimization of matching between electronic generators and ultrasonic oscillatory systems. In the present article has been described a calculation model, that defines dependence between technological mediums properties and full impedance of ultrasonic oscillatory systems.
In this work is the basic of frequency modulation with minimal shift keying (MSK) are considered. The time diagrams of the frequency variation and a phase of the modulated oscillation are resulted. In the chase of res...
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In this work is the basic of frequency modulation with minimal shift keying (MSK) are considered. The time diagrams of the frequency variation and a phase of the modulated oscillation are resulted. In the chase of research the method of the mathematical analysis has been applied.
At present the systems of cellular communications of the third generation start to develop. These systems give a flexible multimedia opportunity. One of the basic standards of the third generation is WCDMA (wideband c...
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At present the systems of cellular communications of the third generation start to develop. These systems give a flexible multimedia opportunity. One of the basic standards of the third generation is WCDMA (wideband code division multiple access) which will be widely applied in Europe, Asia, including Japan and Korea, in the coordinated band in a range about 2 GHz. As against FDMA and TDMA where energy of a signal concentrates on the chosen frequencies or time intervals, signals CDMA are distributed in continuous time-and-frequency space. Thus, actually the method manipulates both frequency, and time, and energy. The purpose of the given work is consideration of ways of an estimation of capacity and throughput of network WCDMA.
Article is devoted to use of ultrasonic technologies for needs of a petroleum industry. Use of ultrasonic oscillations of high intensity for increase production rate oil wells is described. The developed ultrasonic hy...
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Article is devoted to use of ultrasonic technologies for needs of a petroleum industry. Use of ultrasonic oscillations of high intensity for increase production rate oil wells is described. The developed ultrasonic hydroacoustic complex is presented.
In must practical cases observable signal non-linearly depends on informational parameter. Classical approach to construction optimal filtering device consists of this dependence linearization. Well known quasi-linear...
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In must practical cases observable signal non-linearly depends on informational parameter. Classical approach to construction optimal filtering device consists of this dependence linearization. Well known quasi-linear algorithms may be unstable. Synthesis of the non-linear filtration algorithm is considered in this paper. The results of the experimental investigation of this algorithm are given.
The methods of increase of data rate in networks GSM/GPRS using of EDGE technology are considered in this article. Introduction of this technology represents "superstructure" above the existing model of radi...
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The methods of increase of data rate in networks GSM/GPRS using of EDGE technology are considered in this article. Introduction of this technology represents "superstructure" above the existing model of radio access GSM. This isn't demanding transformation of an infrastructure of networks GSM/GPRS, and using the same spectral range, thus allows providing high data rate under low initial capital investments.
In this paper the researches of breakdown characteristics of power planar SOI MOSFET in on and off state is suggested to investigate the heat influence on device reliability.
In this paper the researches of breakdown characteristics of power planar SOI MOSFET in on and off state is suggested to investigate the heat influence on device reliability.
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