Artículos de revistas: "Electric field intensity"

1

Tsuguliev, A. I. "Optoelectronic electric field intensity indicator". Ferroelectrics 69, n.º 1 (julio de 1986): 131–33. http://dx.doi.org/10.1080/00150198608008135.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Cui, Haoyang, Junjie Yang, Jundong Zeng y Zhong Tang. "Optical Limiting Using the Two-Photon Absorption Electrical Modulation Effect in HgCdTe Photodiode". Scientific World Journal 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/245310.

Texto completo

Resumen

The electrical modulation properties of the output intensity of two-photon absorption (TPA) pumping were analyzed in this paper. The frequency dispersion dependence of TPA and the electric field dependence of TPA were calculated using Wherrett theory model and Garcia theory model, respectively. Both predicted a dramatic variation of TPA coefficient which was attributed into the increasing of the transition rate. The output intensity of the laser pulse propagation in the pn junction device was calculated by using function-transfer method. It shows that the output intensity increases nonlinearly with increasing intensity of incident light and eventually reaches saturation. The output saturation intensity depends on the electric field strength; the greater the electric field, the smaller the output intensity. Consequently, the clamped saturation intensity can be controlled by the electric field. The prior advantage of electrical modulation is that the TPA can be varied extremely continuously, thus adjusting the output intensity in a wide range. This large change provides a manipulate method to control steady output intensity of TPA by adjusting electric field.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Walker, M. A. y D. R. Stinebring. "Electric field representation of pulsar intensity spectra". Monthly Notices of the Royal Astronomical Society 362, n.º 4 (25 de agosto de 2005): 1279–85. http://dx.doi.org/10.1111/j.1365-2966.2005.09396.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Buzinov, V. S., N. N. Iskhakova y V. A. Tishchenko. "Reference wide-band electric-field intensity meter". Measurement Techniques 33, n.º 10 (octubre de 1990): 1035–37. http://dx.doi.org/10.1007/bf00990526.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Li, Wang y Zhou. "Adjusting Electric Field Intensity Using Hybridized Dielectric Metamolecule". Symmetry 11, n.º 10 (14 de octubre de 2019): 1285. http://dx.doi.org/10.3390/sym11101285.

Texto completo

Resumen

In this paper, we report on achieving the hybridization effect in a Mie-based dielectric metamolecule and provide its physically intuitive picture. Hybridization results in the splitting of the initial overlapping resonance dips, thus leading to two new collective resonance modes. It was observed via the simulated displacement field distribution that the two modes behave as the in-phase and out-of-phase oscillation of two meta-atoms, thus enhancing and suppressing the intensity of the electric field at the gap between two meta-atoms. Moreover, since the two hybridized modes are caused by the interaction effect, the intensities of the electric field can be adjusted by several external factors, like applied forces and temperature. Taking advantage of this easy-equipped dielectric meta-device, certain zones in it can be applied to receive amplified signals and shielded noises of different frequencies in microwave communication fields. Moreover, due to the function of enhancing electric field intensities, it is also promising in wireless charging technology.

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Biryukov, S. V., L. V. Tyukina y A. V. Tyukin. "Dual spherical intensity sensors for new generation lowfrequency electric fields". Omsk Scientific Bulletin, n.º 179 (2021): 62–67. http://dx.doi.org/10.25206/1813-8225-2021-179-62-67.

Texto completo

Resumen

These electric fields adversely affect the environment, technical and biological objects. In this regard, it is necessary to control the levels of electric fields, an important characteristic of which is the strength of the electric field. Sensors of the electric field strength are required to sense the electric field. The existing sensors are inconvenient in operation and have a high error in the perception of the electric field strength, reaching  20 %. In the work under consideration, the idea of creating a universal sensor of a new type, related to the type of dual sensors, is put forward. Its versatility lies in the fact that it embodies all types of known sensors — single, double, and now twin. The error in the perception of the intensity of the inhomogeneous electric field of the dual sensors does not exceed + 5 % in the entire spatial measurement range 0a1. In this case, the distance d to the field source is limited only by the radius of the spherical base of the sensor, i.e. d  R. At the same time, for sensors that are part of a dual sensor in the same spatial measurement range, the error is  35 %. Using a dual sensor, it is possible to achieve a significant increase in the accuracy of measuring the strength of inhomogeneous electric fields in a wide spatial measurement range in comparison with known sensors.

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Liu, Shu Hong, Z. Z. Zou, B. Q. Xu y Z. G. Zhang. "Anti-Plane Interface Edge Crack between Two Dissimilar Piezoelectric Blocks". Key Engineering Materials 261-263 (abril de 2004): 471–76. http://dx.doi.org/10.4028/www.scientific.net/kem.261-263.471.

Texto completo

Resumen

The problem of an interface edge crack between two dissimilar piezoelectric materials is analyzed under the conditions of anti-plane shear and in-plane electrical loading. The crack is considered to be traction-free, but electric permeable one across which the normal component of the electric displacement are continuous. A series form of electromechanical solution and field intensity factors are obtained. The results show that all fields including strain, stress, electric field strength and electric displacement are singular in the front of crack tip. At last, the stress intensity factor is solved by the boundary collocation method (BCM), numerical results are given and discussed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Lou, Ching-Wen, Ying-Huei Shih, Chen-Hung Huang, Shu-An Lee, Yueh-Sheng Chen y Jia-Horng Lin. "Filtration Efficiency of Electret Air Filters Reinforced by Titanium Dioxide". Applied Sciences 10, n.º 8 (13 de abril de 2020): 2686. http://dx.doi.org/10.3390/app10082686.

Texto completo

Resumen

In this study, titanium dioxide (TiO2), a mineral with a potential and supercapacitor, is used as the reinforcing material to improve the filtration efficacy of electret melt-blown fabrics. Next, the electret melt-blown fabrics are evaluated in terms of surface voltage and filtration efficiency, thereby examining the influences of the TiO2 ratio and electric field intensity. The test results indicate that the filtration efficiency is proportional to the ratio of TiO2 and electric field intensity. In particular, with a TiO2 ratio of 3 wt% and an electric field intensity of 2.5 kV/cm, the electret melt-blown fabrics demonstrate a maximal filtration efficiency of 96.32%, a lowest pressure drop of 40 Pa, and an optimal quality factor of 0.083 Pa−1.

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Zhang, Cheng Guang, Fei Hu Zhang y Yong Zhang. "Simulation on Anode Electric Field Intensity about Electrochemical Jet Machining". Advanced Materials Research 418-420 (diciembre de 2011): 2046–49. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2046.

Texto completo

Resumen

The theory of electrochemical jet machining was introduced, and effect of different parameters on anodic electric field intensity is finite element analyzed by ANSYS software. The Simulation results show that, the electric field shares the same distribution under different electrolysis voltage, which generally contains three parts, uniform distribution area, gradually weakened area, scattered area. In the uniform distribution area, electric field shows comparative uniformity. The anode electric field generated by different jet distance is also obvious distribution areas, the electric field intensity shows decreasing trend. Electric field intensity is found to have a close relationship with electro jet nozzle diameter, in which a faster jet velocity would bring more concentrated distribution of the electric field as well as a smaller size of electric field.

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Gao, You Hua, Fei Liu y You Feng Gao. "Influence on Electric Field Distribution of GIS Basin Insulator for Insulated Material Epoxy Resin with Different Mean Molecular Weights". Applied Mechanics and Materials 130-134 (octubre de 2011): 19–22. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.19.

Texto completo

Resumen

The insulation material epoxy resin mean molecular weight to its solidification electrical performance influence is discussed. In view of the bisphenol A epoxy resin with different mean molecular weights, Finite Element Method (FEM) are introduced and electric field calculation equations are established to calculate the field distribution of basin insulator and its around region in GIS. Representative potential distribution curves are shown. The tangential and normal electric filed intensity maximum of basin insulator is calculated. The positions of electric field intensity maximum are also given.

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Zhao, Xinyuan, Guoyang Wang, Siyu Shao, Qinghao Meng, Jiahui Wang, Sijia Zhang, Bo Su y Cunlin Zhang. "Terahertz Characteristics of Magnetic Fluid Based on Microfluidic Technology". International Journal of Optics 2021 (10 de junio de 2021): 1–8. http://dx.doi.org/10.1155/2021/5599185.

Texto completo

Resumen

Magnetic fluid is a new functional material with both liquid fluidity and solid magnetism, which has important application value in medicine, biology, and so on. In this study, terahertz technology and microfluidic technology were combined to investigate the terahertz transmission characteristics of a magnetic fluid in different magnetic fields and different electric fields. In the external magnetic field, the intensity of the terahertz spectrum increased with an increase in the magnetic field intensity, and the response to the magnetic field in different directions was different. Under the applied electric field, the intensity of the terahertz spectrum decreased with an increase in the electric field intensity. This method is convenient for studying the terahertz characteristics of magnetic fluid and provides technical support for in-depth studies of magnetic fluid.

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

HAN, PENG, KUI-JUAN JIN, YUE-LIANG ZHOU, QING-LI ZHOU y K. HIRAKAWA. "TERAHERTZ RADIATION IN SUPERLATTICES IN MODERATE ELECTRIC FIELD". International Journal of Modern Physics B 20, n.º 08 (30 de marzo de 2006): 937–45. http://dx.doi.org/10.1142/s0217979206033693.

Texto completo

Resumen

We have studied the terahertz (THz) radiation in superlattices (SLs) in moderate electric field region (between 12 kV/cm and 25 kV/cm) from both theoretical and experimental aspects in this work. The THz emission intensity has been calculated for three samples of GaAs/Al 0.3 Ga 0.7 As SLs by using Kane model. The theoretical results show that the radiation intensity increases until the electric field F achieves a certain value between 14 kV/cm and 16 kV/cm for various samples, and then starts to roll off. The agreement of the calculated results with the experimental data demonstrates that the rolling of THz radiation intensity is due to the competition of field induced localization of wave functions and the increasing of the photon energy in THz radiation with increased electric fields. Furthermore, it is also shown that THz radiation intensity can be affected by the scattering of the randomly distributed Al atoms in the barriers.

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Shenjiang, Wu, Li Dangjuan y Su Junhong. "Laser-induced diamond-like carbon film under different electric field directions". Laser and Particle Beams 34, n.º 1 (6 de enero de 2016): 137–42. http://dx.doi.org/10.1017/s0263034615001056.

Texto completo

Resumen

AbstractTi electrodes were directly deposited at different positions on diamond-like carbon (DLC) films to form horizontal and longitudinal electric fields on their surfaces. The ID/IG ratio increased with the sp3 content in the membrane when the DLC film was laser-irradiated and the electric field intensity was 0 V/cm. The bias electric field intensity increased from 0 to 1000 V/cm, and the corresponding laser-induced damage threshold (LIDT) increased. The three-dimensional damage morphology of the DLC film with two different electrode structures was observed when the electric field intensity was 220 V/cm. Two types of electrode structures were observed in the Raman spectra under an electric field intensity of 110 V/cm and laser energy densities of 0 and 1.56 J/cm2. Results showed that the horizontal bias field had a more obvious influence than the longitudinal electric field on the decrease of the sp3–sp2 hybridization, preventing the formation of sp2 clusters, thereby slowing down the graphitization process of DLC. Applying the bias field to the DLC film could slow down the DLC film graphitization process and improve the LIDT of the DLC film.

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Kumykov, T. S. "Влияние фрактальной структуры на электрическое поле в грозовых облаках". Вестник КРАУНЦ. Физико-математические науки, n.º 4 (27 de diciembre de 2021): 84–91. http://dx.doi.org/10.26117/2079-6641-2021-37-4-84-91.

Texto completo

Resumen

The paper considers the degree of fractal structure impact on the electric field intensity inside thunderstorm clouds using the apparatus of fractional integrodifferentiation. We propose a mathematical model of intensity dynamics of a static electric field in the thunderstorm clouds, taking into account media with fractal dimension. The results obtained confirm the close connection of electrophysical processes in thunderclouds with the fractal medium itself. В статье с помощью аппарата дробного интегро-дифференцирования рассматривается степень влияния фрактальной структуры на напряженность электрического поля внутри грозовых облаков. Предлагается математическая модель динамики напряженности статического электрического поля в грозовых облаках с учетом сред с фрактальной размерностью. Полученные результаты подтверждают тесную связь электрофизических процессов в грозовых облаках с самой фрактальной средой В статье с помощью аппарата дробного интегро-дифференцирования рассматривается степень влияния фрактальной структуры на напряженность электрического поля внутри грозовых облаков. Предлагается математическая модель динамики напряженности статического электрического поля в грозовых облаках с учетом сред с фрактальной размерностью. Полученные результаты подтверждают тесную связь электрофизических процессов в грозовых облаках с самой фрактальной средой.

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Biryukov, S. V., L. V. Tyukina y A. V. Tyukin. "Method for measuring intensity of inhomogeneous electrical fields by average value". Omsk Scientific Bulletin, n.º 178 (2021): 67–74. http://dx.doi.org/10.25206/1813-8225-2021-178-67-74.

Texto completo

Resumen

Measurement and control of the intensity levels of inhomogeneous electric fields with high accuracy is quite a difficult task. The solution to this problem is connected both with the development of new sensors and methods for measuring the electric field strength. The creation of new high-precision electrical induction sensors has exhausted its capabilities at the current level of technology and technology. Therefore, new ideas are needed for solving the problems of high-precision measurement of the electric field strength. One of these ways is the development of new measurement methods. Existing measurement methods characterized by the complexity of the measurement processes, suitability in some cases, and unsuitability in others, do not provide the desired metrological characteristics. Therefore, the work related to the development of methods for measuring the intensity of inhomogeneous electric fields does not stand still, and is relevant. The aim of the study is to create a new method for measuring the strength of electric fields using known sensors, which makes it possible to significantly reduce the error in measuring inhomogeneous electric fields. The idea of constructing a new measurement method is formed. The idea of the method is that in the presence of two physical quantities measured with different sign values of the error, the average value of the physical quantity will always be closer to the true value. Based on this, a new method for measuring the intensity of inhomogeneous electric fields is proposed, associated only with the original measurement process. The measurement method id named «Average value method» (MSZ). The estimation of the error of this method shows a decrease in the measurement error to +5 % with the full spatial measurement range 0a1. Using the «Average value method» it is possible to achieve a significant increase in the accuracy of measuring the strength of inhomogeneous electric fields in a wide spatial range of measurements in comparison with known methods

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

KETKAEW, Siseerot. "DEVELOPMENT OF ELECTRIC CHARGE GENERATOR BY APPLIED PULSE HIGH INTENSITY ELECTRIC FIELD". European Journal of Materials Science and Engineering 4, n.º 3 (20 de septiembre de 2019): 114–20. http://dx.doi.org/10.36868/ejmse.2019.04.03.114.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Krempaský, Július y Miroslava Smrčinová. "Chemical temporal and spatial structures in strong magnetic field". Collection of Czechoslovak Chemical Communications 54, n.º 5 (1989): 1232–43. http://dx.doi.org/10.1135/cccc19891232.

Texto completo

Resumen

Temporal and spatial structures in the Belousov-Zhabotinskii systems in constant electric and strong magnetic fields are studied in this paper. Unlike a random generation of chemical wave center in a system without the influence of an electromagnetic field we have observed that only one wave forms in the presence of electric and magnetic fields of suitable intensity and induction. Its speed of propagation depends on the connected fields. A theory of this phenomenon has been developed and the obtained results are in a good agreement with experimentally measured dependences of the temporal period of chemical waves on electric field intensity and magnetic field induction.

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Liu, Zhaoxiang, Haoyi Li, Weifeng Wu, Hongbo Chen, Yumei Ding y Weimin Yang. "Effect of electric field on gas-assisted melt differential electrospinning with hollow disc electrode". Journal of Polymer Engineering 35, n.º 1 (1 de enero de 2015): 61–70. http://dx.doi.org/10.1515/polyeng-2014-0015.

Texto completo

Resumen

Abstract The concept of a gas-assisted melt differential electrospinning device with hollow disc electrode is presented. As the electric field force is the only drawing force stretching polymer melt jet to fibers, it is necessary to study the distribution and electric field intensity of the electric field created in the spinning region caused by the hollow disc electrode. A series of electric field simulations, including the distribution of the electric field and the relationship between electric field intensity and various parameters were carried out by the finite element method. In addition, experiments of melt electrospinning were conducted, mainly focusing on several electrical parameters affecting the fiber diameter. The results of simulations were compared with those of experiments, proving experimental phenomena and conjectures. The results of simulations and experiments were mutually corroborated and consistent with each other. All results provided significant support and basis for future exploration and development of melt electrospinning.

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Babaev, V. P., S. V. Zaitsev, K. A. Inshakova y A. N. Shaykin. "Mechanical effect of an electric field on nanostructure elements". Physics and Chemistry of Materials Treatment 3 (2021): 79–82. http://dx.doi.org/10.30791/0015-3214-2021-3-79-82.

Texto completo

Resumen

A computational and experimental estimation of the magnitude of forces acting in a high-intensity electric field on elements of nanoconstructions with a high surface curvature is made. Depending on the magnitude of the electric potential and vacuum conditions, these forces can vary both in magnitude and direction over a wide range. They can cause structural damage, as well as provoke unwanted electrical discharges. The possibilities of useful application of these effects are analyzed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Amrita, Anak Agung Ngurah. "Study of The Electric Field Between Horizontal and Vertical Configuration Pole under 150 KV High Voltage Transmission Line (SUTT 150 KV)". Journal of Electrical, Electronics and Informatics 1, n.º 2 (12 de septiembre de 2017): 22. http://dx.doi.org/10.24843/jeei.2017.v01.i02.p06.

Texto completo

Resumen

Distribution of electrical energy from a plant to a substation or from a substation to other substations usually uses a transmission line. In Bali, type of transmission line that is usually implemented is SUTT 150 kV. The magnitude of the applied voltage is an attempt to reduce power loss for long distance distribution. However, distributing electrical energy with increasing stress affects the increase of electric field around the transmission line. The negative impact of electricity distribution has been an environmental problem for PT. PLN (Persero), especially where there is conversion from an open area to be a residential. This problem has been the main reason for conducting this research. IRPA / INIRC recommendation states that exposure time is not limited to the electric field effect in work environment and public area including a residential area at frequency of 50/60 Hz is 5 kV/m. This recommendation is in accordance with SNI 04-6950-2003, on Threshold Limit Values ??Electric Field under SUTT and high-voltage wires. The first problem of this research is how large the intensity of the electric field between two poles of SUTT 150 kV with vertical and horizontal constructions which are built side by side? The second problem is what the characteristic of the electric field intensity between the two poles which are built side by side? From the analysis, it can be seen that the intensity of the electric field that occurs between the conductor of the vertical and horizontal pole configurations are still below the IRPA/INIRC and SNI 04-6950-2003 recommendation i.e. 1 up to 1.5 kV/m and at a distance of 18 meters to 25 meters there is an interaction of electric field intensity that occurs at these two configurations.

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

LIU, MIAN, WENDONG MA y ZIJUN LI. "POLARON IN A QUANTUM DOT UNDER AN ELECTRIC FIELD". Modern Physics Letters B 21, n.º 24 (20 de octubre de 2007): 1635–42. http://dx.doi.org/10.1142/s0217984907014012.

Texto completo

Resumen

We conducted a theoretical study on the properties of a polaron with electron-LO phonon strong-coupling in a cylindrical quantum dot under an electric field using linear combination operator and unitary transformation methods. The changing relations between the ground state energy of the polaron in the quantum dot and the electric field intensity, restricted intensity, and cylindrical height were derived. The numerical results show that the polar of the quantum dot is enlarged with increasing restricted intensity and decreasing cylindrical height, and with cylindrical height at 0 ~ 5 nm , the polar of the quantum dot is strongest. The ground state energy decreases with increasing electric field intensity, and at the moment of just adding electric field, quantum polarization is strongest.

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Kiełbasa, Paweł, Tomasz Dróżdż y Ernest Popardowski. "Influence of Coniferous Wood Conditioning by Pulsed Electric Field on Its Combustion Heat Characteristics". Applied Sciences 11, n.º 3 (22 de enero de 2021): 983. http://dx.doi.org/10.3390/app11030983.

Texto completo

Resumen

The article presents the impact of sawdust conditioning from coniferous trees with a pulsed electric field (PEF) on the characteristics of the combustion heat. The study used four variants of electric field parameters, i.e., (I) 300 discharges with an electric field intensity of 25 kV·cm−1, (II) 150 discharges with an electric field intensity of 25 kV·cm−1, (III) 300 discharges with an electric field intensity of 30 kV·cm−1, (IV) 150 discharges with an electric field intensity of 30 kV·cm−1. It should be noted that the interval between successive discharges was 10 sec and it was constant for each variant of the experiment. A change in the characteristics of the heat of combustion was found under the influence of a pulsed electric field on sawdust from coniferous trees in each period of the measurement. The highest temperatures were achieved by the interaction of a pulsed electric field with a discharge pulse of 30 kV·cm−1 and the number of discharge cycles amounting to 300, whereas significantly lower temperature values were recorded with the discharge electric field intensity of 25 kV·cm−1. It was found that the longest times from the moment of ignition to reaching the maximum temperature were obtained for the material after the influence of PEF with an electric field intensity of 30 kV·cm−1 and the number of pulses 300 (IV combination), while the shortest time of the analyzed interval was stated for the first combination of the experiment (electric field intensity 25 kV·cm−1 and a number of pulses 150). The use of a pulsed electric field allows modeling the combustion time of a homogeneous material, which enables the improvement of the process control possibilities, and is also important information for the design of devices intended for biomass combustion.

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Jiang, Hui Lan, Kai Zeng, Jian Min Liu y Chao Li. "Analysis and Calculation of Substation’s Internal Electric Field Intensity Caused by Incoming and Outgoing Lines". Applied Mechanics and Materials 291-294 (febrero de 2013): 2428–31. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.2428.

Texto completo

Resumen

In ultra-high voltage transmission system, the electrostatic induction generated by power frequency electric field will exerts negative effects on the electrical automation equipment within the substation and, in particular, will leads long-term harm to staffs’ health. However, researches of electric field environment in ultra-high voltage transmission system merely concentrate on calculating the electric field intensity caused by three-phase limited length wire or three-phase infinite wire within the transmission, without considering the method of calculating half-infinite wire which represents “one end is fixed, while the other end is infinite length’s wire”. Consequently, a new method named “Charge Simulation-Genetic Algorithm (CS-GA) method” which can efficiently calculate power frequency electric field inside of the substation is proposed in the paper. In CS-GA method, the effective calculating length is determined by genetic algorithm method’s optimization, which in other words, half-infinite length wire is substituted for limited length wire in calculating the electric field intensity. The simulation results indicate that CS-GA method is a relatively accurate, efficient and reasonable way on calculating the power frequency electric field inside of the substation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Shemshadi, Asaad y Pourya Khorampour. "NOVEL ELECTRIC FIELD EXPOSURE CONTROL METHODS FOR MULTI-STORY BUILDINGS INSTALLED IN VICINITY OF HIGH-VOLTAGE APPARATUS USING FEM". ASEAN Engineering Journal 11, n.º 4 (26 de octubre de 2021): 179–203. http://dx.doi.org/10.11113/aej.v11.17872.

Texto completo

Resumen

Facilities and buildings installed nearby high voltage equipment and electric field exposure is always a serious threat to the health of organisms and can have a significant impact on the functioning of sensitive and vital organs such as the heart and brain. Therefore, it is necessary to study the electromagnetic field value in these areas to control the intensity and restrict the induced value regarding to international recommendations. In this paper, the effects of 230KV transmission line electric fields on the environment are examined by proper FEM software.The model under consideration in this project is a four story building adjacent to the 230KV transmission line.At first, the distance between the building and high voltage transmission lines and its relationship to the intensity of the electric field is examined, and then the intensity of the electric field is compared to the standards of the International Commission on Non Ionizing Radiation Protection (ICNIRP). To continue, in places where the electric field exceeds the standard level value, solutions to reduce the intensity of the electric field to the tolerable value have been proposed.The first solution is to use a metal shield around the building as a Faraday cage, which weakens the potential for electric field value by creating an enclosed surface, the reduction rate is 4700%,both complete cage shape and incomplete cage shapes are considered in this study which reduces the exposure value to 62.5% of its initial value. The second approach to reducing the electric field is to use protective conductor paints against electromagnetic fields. In the following study, the effect of using trees as a barrier against electromagnetic radiation will be examined. Finally, the three proposed solutions are compared in terms of environmental constraints, economic justification, and the reduction in electric field value.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Knorr, Dietrich, Alexander Angersbach, Mohamed N. Eshtiaghi, Volker Heinz y Dong-Un Lee. "Processing concepts based on high intensity electric field pulses". Trends in Food Science & Technology 12, n.º 3-4 (marzo de 2001): 129–35. http://dx.doi.org/10.1016/s0924-2244(01)00069-3.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Serebriakov, D. G. y R. R. Abdullin. "Electric field intensity in cross-section of evaporation duct". IOP Conference Series: Materials Science and Engineering 524 (28 de mayo de 2019): 012004. http://dx.doi.org/10.1088/1757-899x/524/1/012004.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Gric, T. y M. Cada. "Analytical electric field intensity profile in diffused channel waveguides". Journal of Electromagnetic Waves and Applications 29, n.º 1 (18 de diciembre de 2014): 124–31. http://dx.doi.org/10.1080/09205071.2014.990114.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Monga, Jagdish C. "Multilayer Thin-film Polarizers with Reduced Electric-field Intensity". Journal of Modern Optics 36, n.º 6 (junio de 1989): 769–84. http://dx.doi.org/10.1080/09500348914550841.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Gertners, U. y J. Teteris. "All-Optical Surface Micropatterning by Electric Field Intensity Gradient". Advances in OptoElectronics 2015 (5 de noviembre de 2015): 1–8. http://dx.doi.org/10.1155/2015/917029.

Texto completo

Resumen

In this report an all-optical photo-induced formation of surface relief gratings is shown. For the surface patterning of As2S3 and As4S1.5Se4.5 films a direct holographic recording setup with a 532 nm wavelength Nd:YAG CW laser light was used. Our investigations have shown that the light-induced mass transfer process strongly depends on the material itself and on the polarization of the light. It has been shown that an electric field intensity gradient has to be obtained to achieve a direct patterning. The evolution of a surface relief in relation to recording parameters and thickness of the sample has been investigated in detail.

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Koller, J., V. Kříha, J. Píchal y L. Aubrecht. "Corona discharge light emission and electric field intensity comparison". Czechoslovak Journal of Physics 54, S3 (marzo de 2004): C810—C815. http://dx.doi.org/10.1007/bf03166491.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Zhao, Shanpeng, Chenrui Zhang, Youpeng Zhang y Sihua Wang. "Influence of Partial Arc on Electric Field Distribution of Insulator Strings for Electrified Railway Catenary". Energies 12, n.º 17 (27 de agosto de 2019): 3295. http://dx.doi.org/10.3390/en12173295.

Texto completo

Resumen

The occurrence of a partial arc can affect insulation properties of the insulator by different types of flashover. In order to investigate the influence of a partial arc on electric field distribution along the catenary insulator string, a three-dimensional model of the cap-pin insulator string with partial arc was established in this paper. The electric field distribution along the insulator string when the arc extended on the insulator surface and bridged sheds was investigated based on the electric field analysis using the finite element method. The results showed that the occurrence of a partial arc caused obvious distortion of the electric field, which was a two-dimensional axis symmetrical field before arcing to a three-dimensional field. In the case of arc extension, the sudden rise of field intensity was mostly at the rib and the shed edge, which had the local maximum field intensity. The rib and the shed edge played a certain hindrance role in the extension of the arc. The main reason for promoting the development of the arc can be attributed to thermal ionization. In the case of arc bridge sheds, the highest field intensity appeared at the edge of the last bridged shed. As the number of sheds arc-bridged increased, the maximum field intensity also increased. As the arc length increased, the electric field intensity of the arc head also increased, which resulted in an accelerated arc development. The main factor to promote the development of the arc can be attributed to electrical breakdown. The measures to hinder the rapid development of partial arcs were proposed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Zhang, Zheng, Jiang Hong Wu y Guang Shu Si. "Novel High-Intensity Thermoelectric Generator and its Application on Hybrid Electric Vehicle". Key Engineering Materials 336-338 (abril de 2007): 892–95. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.892.

Texto completo

Resumen

The hybrid electric vehicle (HEV) equipped both engine and generator is a transitional type from the internal-combustion engine vehicle to electric vehicle, but is a self-existent type, too. Applying a thermoelectric generator to recovery the waste heat of its engine, could not only improve the energy saving, but also the discharge / charge performance of the vehicle. For this purpose, the applicable generator must be a high-power and high-density one, which exchanges energy between the waste heat flow field and the conversion electric field; moreover, the temperature field is the coupling field with them. One of the methods to increase power-density of the generator is to strengthen the conversion intensity among above fields. In this paper, firstly a novel internal-axial-netted thermoelectric generator is presented, which includes following basic ideas: (1) using the stereo-electrodes to improve the integration of thermo-elements; (2) let the thermocouples to do heat convection directly with heat gas flow in pipe, to increase the heat flow density and electric current density, reduce the thermal resistance on solid conducting; (3) using the compensating wire to connect thermoelectric circuit and elongate the distance between hot source and cold source, so a higher temperature difference and a stronger cooling effect can be made. The analyses show though this generator used existing thermoelectric materials, its out-power can be increased and volume can be compacted. After this, secondly, the application scheme and key technologies of the novel high-intensity thermoelectric generator (HTG) as a main electrical source to supply electric power in HEV are chiefly discussed also.

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Khorasani, Amir, Seyed Mohammad Firoozabadi y Zeinab Shankayi. "Conductivity change with needle electrode during high frequency irreversible electroporation: a finite element study". Polish Journal of Medical Physics and Engineering 25, n.º 4 (1 de diciembre de 2019): 237–42. http://dx.doi.org/10.2478/pjmpe-2019-0031.

Texto completo

Resumen

Abstract Irreversible electroporation (IRE) is a process in which the cell membrane is damaged and leads to cell death. IRE has been used as a minimally invasive ablation tool. This process is affected by some factors. The most important factor is the electric field distribution inside the tissue. The electric field distribution depends on the electric pulse parameters and tissue properties, such as the electrical conductivity of tissue. The present study focuses on evaluating the tissue conductivity change due to high-frequency and low-voltage (HFLV) as well as low-frequency and high-voltage (LFHV) pulses during irreversible electroporation. We were used finite element analysis software, COMSOL Multiphysics 5.0, to calculate the conductivity change of the liver tissue. The HFLV pulses in this study involved 4000 bipolar and monopolar pulses with a frequency of 5 kHz, pulse width of 100 µs, and electric field intensity from 100 to 300 V/cm. On the other hand, the LFHV pulses, which we were used, included 8 bipolar and monopolar pulses with a frequency of 1 Hz, the pulse width of 2 ms and electric field intensity of 2500 V/cm. The results demonstrate that the conductivity change for LFHV pulses due to the greater electric field intensity was higher than for HFLV pulses. The most significant conclusion is the HFLV pulses can change tissue conductivity only in the vicinity of the tip of electrodes. While LFHV pulses change the electrical conductivity significantly in the tissue of between electrodes.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Korshunova, A. N. y V. D. Lakhno. "Charge Motion along a Polynucleotide Chains in a Constant Electric Field Depends on the Charge Coupling Constant with Chain Displacements". Mathematical Biology and Bioinformatics 16, n.º 2 (4 de diciembre de 2021): 411–21. http://dx.doi.org/10.17537/2021.16.411.

Texto completo

Resumen

Various regimes of a charge motion along a chain in a constant electric field are investigated. This motion is simulated on the basis of the Holstein model. Earlier studies demonstrate a possibility of a uniform motion of a charge in a constant electric field over very long distances. For small values of the electric field intensity a Holstein polaron can move at a constant velocity. As the electric field intensity increases, a charge motion acquires oscillatorily character, performing Bloch oscillations. Since the charge motion depends on the whole set of the system parameters the character of the motion depends not only on the value of the electric field intensity. Therefore, the electric field intensity for which the uniform motion takes place differs for chains with different parameters. The character of the charge motion and distribution is considered in chains with different values of the constant of coupling between the charge and the displacements of the chain. We showed that the values of the electric field intensity for which the regime of a charge motion changes are different in chains with different values of the coupling constant. We also demonstrated that for one and the same value of the electric field intensity, in chains with different values of the coupling constant either a uniform motion or an oscillatory motion, or a stationary polaron can be observed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Hassani, Mahdi, Seyed Siavash Karimi Madahi, Hassan Feshki Farahani y Hossein Sarabadani. "A New Method to Improve the Voltage Distribution and Electric Field Control for Conceder Bushing". Applied Mechanics and Materials 110-116 (octubre de 2011): 5184–88. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.5184.

Texto completo

Resumen

Capacitor bushings are one of the key components in power transformers. Although their price is a negligible part of the total price of the power transformer, their quality has a significant effect on performance and reliability of power transformers. In high voltage capacitor bushings, the intensity of voltage and electric field on bushing abacus is very high. This high intensity is also observed in flange parts. The amount of multi layer insulator among the electrodes or floating plates in capacitor bushing make equi-potential surfaces and reduction of electric field in these areas can greatly improve the capacitor bushing performance. In this paper, we investigate the reduction of field intensity and electrical tension and also improvement in voltage control by displacing floating plates which are in the form of aluminum foils stick to impregnated paper. To calculate the field intensity, we used the MAXWELL software using FEM (Finite element method). Using this new method of placing capacitor core its effect on voltage profile reduction and field electrical tension is shown. Over voltage and pollution effects are also investigate on power transformer bushings.

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Гончаренко, Игорь Андреевич, Виталий Николаевич Рябцев, Александр Васильевич Ильюшонок y Олег Дмитриевич Навроцкий. "Sensor of high frequency electric fields intensity on the base of slot waveguides with electro-optic polymer filling". Journal of Civil Protection 4, n.º 4 (20 de noviembre de 2020): 378–88. http://dx.doi.org/10.33408/2519-237x.2020.4-4.378.

Texto completo

Resumen

Purpose. Development of the structure and operation principles of high frequency electric fields intensity optical sensor. Methods. Method of lines was used for calculation of propagation constants and mode electric fields distribution of strip waveguides with vertical and horizontal slots filled with electro-optical polymer SEO125. Findings. The structure and operation principles of high frequency electric fields intensity sensor on the base of slot waveguides with vertical and horizontal slots filled with electro-optical polymer are proposed. Sensor makes it possible measuring the variable electric fields with frequencies up to 10 MHz. The sensor sensitivity order is of 30 V/m. Application field of research. Determination of fire-dangerous and injurious factors of electric field during emergencies elimination.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Emek, Mehriban, Nurettin Besli, Ahmet Yildirim y Suleyman Yilmaz. "Optical properties of nematic liquid crystal (C21H27NO2S) under AC/DC electric fields". Canadian Journal of Physics 87, n.º 4 (abril de 2009): 293–98. http://dx.doi.org/10.1139/p09-030.

Texto completo

Resumen

In this study, the effects of the phase transition on the optical transmittance of the nematic liquid crystal C21H27NO2S, 4′-isothiocyanatophenyl-4-pentylbicyclo[2,2,2]octane-1-carboxylate are investigated in terms of temperature variation and rotational angle of the polarizer through electro-optical methods under AC / DC electric fields. It is observed that the domain structure of the material is affected considerably by the applied electric field as the temperature changes. Under applied electric fields, the crystal-nematic (CN) phase-transition point changes and the behaviour of the liquid crystal in the phase-transition region shows some differences. The intensity of the light passing through the system under a DC electric field increases as the electric field rises. Nevertheless, the intensity of the transmitted light under an AC electric field increases at the beginning and then decreases as the electric field rises to a temperature of more than 355 K. These results can be explained through the formation of a domain structure during the phase-transition process and the light scattering caused by these structures.

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Tsuge, Seigo, Toshio Kikuta, Toshinari Yamazaki y Bogusław Fugiel. "Role of Bias Electric Field for X-ray Diffraction Intensity by TGS Crystal in Transverse Electric Field". Ferroelectrics 485, n.º 1 (26 de agosto de 2015): 27–33. http://dx.doi.org/10.1080/00150193.2015.1060093.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Vallverdú-Queralt, Anna, Isabel Odriozola-Serrano, Gemma Oms-Oliu, Rosa M. Lamuela-Raventós, Pedro Elez-Martínez y Olga Martín-Belloso. "Impact of high-intensity pulsed electric fields on carotenoids profile of tomato juice made of moderate-intensity pulsed electric field-treated tomatoes". Food Chemistry 141, n.º 3 (diciembre de 2013): 3131–38. http://dx.doi.org/10.1016/j.foodchem.2013.05.150.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Mokhatri, Mehrdad y Zulkurnain Abdul-Malek. "The Effect of Grounding Electrode Parameters on Soil Ionization and Transient Grounding Resistance Using Electromagnetic Field Approach". Applied Mechanics and Materials 554 (junio de 2014): 628–32. http://dx.doi.org/10.4028/www.scientific.net/amm.554.628.

Texto completo

Resumen

The soil ionization phenomenon occurs during the dispersion of lightning current into the earth. This phenomenon causes the grounding electrode resistance to be effectively reduced. The extension of the soil ionization depends on the current amplitude along the electrode and the resultant electric field intensity surrounding the electrode. The electrical and physical parameters of the grounding electrode system are found as factors that affect the electric field intensity. In this study the electromagnetic field approach and the soil breakdown theory are taken into account to investigate the effect of the mentioned factors on soil ionization and grounding resistance. Changing the parameters of the grounding electrode system affect the electric field distribution around the electrode. Based on the conditions the grounding electrode resistance was reduced between 12% to 75% by considering the soil ionization effect.

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Guo, L., Yuan Yuan Li, Xiao Qiang Li y Jun Yi Yang. "Numerical Analysis on Temperature Field of Axial Alternating Magnetic Field-Assisted Electric Field-Activated Sintering". Materials Science Forum 575-578 (abril de 2008): 702–8. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.702.

Texto completo

Resumen

The numerical simulation and experimental measurement of temperature distribution in electrical field activated sintering of titanium powders were carried out. The simulated and experimental results were in good agreement. It was shown that the sintering temperature gradually decreased from the center of sample to the outer. To improve the performance of sintered material, the sintering temperature gradient had to minimize. A method, electric field-activated sintering coupled with axial alternating magnetic field, was proposed to homogenize sintering temperature field. The simulation of sintering temperature field was also conducted under different magnetic field intensity. It was proved that the maximum radial sintering temperature difference in sample was reduced by about three fourths, owing to the skin effect of induced current caused by alternating magnetic field.

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Tang, Chunmei, Xinyue Liao, Weijie Zhong, Hongya Yu y Zhongwu Liu. "Electric field assisted growth and field emission properties of thermally oxidized CuO nanowires". RSC Advances 7, n.º 11 (2017): 6439–46. http://dx.doi.org/10.1039/c6ra27426a.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

SHEN, HAIJUN. "GEOMETRICAL CONFIGURATION AND ELECTRONIC STRUCTURE OF C60 FULLERENE MOLECULE UNDER EXTERNAL ELECTRIC FIELD". International Journal of Nanoscience 04, n.º 03 (junio de 2005): 389–97. http://dx.doi.org/10.1142/s0219581x05003206.

Texto completo

Resumen

By the molecular dynamics/quantum mechanics method (MD/QM method), shape, volume, charge distribution, dipole moment, system energy and molecular orbital energy levels of C 60 fullerene molecule under applied electric field are calculated systematically. The geometrical configuration and electronic structure of the C 60 fullerene at different field intensity are analyzed as well. The results of this paper show that: (1) under applied electric field, C 60 fullerene is polarized, elongated in the direction of the electric field, shortened in the direction perpendicular to the electric field, and swollen in volume. When the field intensity is up to 0.102 a.u, the electric field-induced breaking in the C 60 molecule occurs; (2) with increasing electric field intensity, molecular dipole moment of the C 60 fullerene increases, and system energy, LUMO and HOMO energy levels of the C 60 decrease. However, the energy gap between LUMO and HOMO decreases firstly, and then increases.

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Chen, Yun-Yu. "Influence of thermodynamic mechanism of inter- facial adsorption on purifying air-conditioning engineering under intensification of electric field". Archives of Thermodynamics 37, n.º 4 (1 de diciembre de 2016): 105–19. http://dx.doi.org/10.1515/aoter-2016-0030.

Texto completo

Resumen

AbstractAs a kind of mass transfer process as well as the basis of separating and purifying mixtures, interfacial adsorption has been widely applied to fields like chemical industry, medical industry and purification engineering in recent years. Influencing factors of interfacial adsorption, in addition to the traditional temperature, intensity of pressure, amount of substance and concentration, also include external fields, such as magnetic field, electric field and electromagnetic field, etc. Starting from the point of thermodynamics and taking the Gibbs adsorption as the model, the combination of energy axiom and the first law of thermodynamics was applied to boundary phase, and thus the theoretical expression for the volume of interface absorption under electric field as well as the mathematical relationship between surface tension and electric field intensity was obtained. In addition, according to the obtained theoretical expression, the volume of interface absorption of ethanol solution under different electric field intensities and concentrations was calculated. Moreover, the mechanism of interfacial adsorption was described from the perspective of thermodynamics and the influence of electric field on interfacial adsorption was explained reasonably, aiming to further discuss the influence of thermodynamic mechanism of interfacial adsorption on purifying air-conditioning engineering under intensification of electric field.

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Dorofeev, R. Yu, D. V. Kozlov, I. P. Smirnov y A. A. Zhukov. "Vibration Modulator for Electric Field Intensity Control in Orbital Conditions". Rocket-Space Device Engineering and Information Systems 3 (septiembre de 2016): 84–88. http://dx.doi.org/10.17238/issn2409-0239.2016.3.84.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Gavrilov, V. A. y A. V. Naumov. "Modulation of geoacoustic emission intensity by time-varying electric field". Russian Journal of Earth Sciences 17, n.º 1 (26 de enero de 2017): 1–9. http://dx.doi.org/10.2205/2017es000591.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Chen, Xiaoyong, Fa Du, Tuan Guo, Jiajie Lao, Xuejun Zhang, Zhaochuan Zhang, Fu Liu, Jie Li, Chengkun Chen y Bai-Ou Guan. "Liquid Crystal-Embedded Tilted Fiber Grating Electric Field Intensity Sensor". Journal of Lightwave Technology 35, n.º 16 (15 de agosto de 2017): 3347–53. http://dx.doi.org/10.1109/jlt.2016.2643163.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Chen, Ding-Yeng y Ching-Yen Ho. "Scattering Intensity of Electric Field in Laser-Irradiated Nanoscale Groove". Advanced Science Letters 19, n.º 8 (1 de agosto de 2013): 2432–35. http://dx.doi.org/10.1166/asl.2013.4889.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Tanabe, Hiroyoshi, Hirotomo Inui, Yukio Ogura y Shunji Kishida. "Polarization Dependence of Electric Field Intensity Distributions in Photoresist Films". Japanese Journal of Applied Physics 33, Part 1, No. 12B (30 de diciembre de 1994): 6998–7000. http://dx.doi.org/10.1143/jjap.33.6998.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Okumura, Takamasa, Yuji Muramoto y Noriyuki Shimizu. "Dependency of arabidopsis thaliana growth on DC electric field intensity". IEEE Transactions on Dielectrics and Electrical Insulation 21, n.º 2 (abril de 2014): 913–17. http://dx.doi.org/10.1109/tdei.2013.004085.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Artículos de revistas sobre el tema "Electric field intensity"

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros