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Journal articles on the topic 'Pulse tests'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Ritt, Stefan Andreas, and Alastair F. Johnson. "Load Pulse Determination in Gas Gun Impact Tests." Applied Mechanics and Materials 7-8 (August 2007): 259–64. http://dx.doi.org/10.4028/www.scientific.net/amm.7-8.259.

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This paper is concerned with methods to determine the resultant impact load pulse on test structures during gas gun tests. The muzzle of a gas gun carries an instrumented target support designed to measure force-time-pulses of the impact event on structures mounted on the device. The target during impact is supported on two long slender metallic bars with axial strain gauges. By measuring the impact strain pulses in the support bars and assuming longitudinal wave propagation, it is possible to determine the impact load pulse on the target. The paper describes the strain measuring device and me

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2

Achour, Yahia, Jacek Starzyński, and Kazimierz Jakubiuk. "New Architecture of Solid-State High-Voltage Pulse Generators." Energies 15, no. 13 (2022): 4823. http://dx.doi.org/10.3390/en15134823.

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The application of the nanosecond pulsed electric field (nsPEF) for biomedical treatments has gained more interest in recent decades due to the development of pulsed power technologies which provides the ability to control the electric field dose applied during tests. In this context, the proposed paper describes a new architecture of solid-state high-voltage pulse generators (SS-HVPG) designed to generate fully customised sequences of quasi-rectangular pulses. The idea is based on the combination of semiconductor switches (IGBT/MOSFET) known for their flexibility and controllability with spec

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Novakowski, Kentner S. "Analysis of pulse interference tests." Water Resources Research 25, no. 11 (1989): 2377–87. http://dx.doi.org/10.1029/wr025i011p02377.

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Zhang, Huayi, and Yilin Tang. "A Fuzzy Controller for PFN Trigger Time Sequence in Electromagnetic Railgun System." Journal of Physics: Conference Series 2478, no. 8 (2023): 082015. http://dx.doi.org/10.1088/1742-6596/2478/8/082015.

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Abstract For the electromagnetic launch system, how to realize the wide pulse, fast rise, and small fluctuation of pulse forming network output current is a core problem. A trigger time sequence control method based on fuzzy theory for the pulse forming network is proposed in this paper. First, circuit models of pulse forming unit, pulse forming network, and electromagnetic rail launcher is established. Second, a fuzzy trigger time sequence controller model for pulse forming network is designed by using Simulink. Third, fixed time sequence discharge tests consisting of 20 pulsed forming units

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Li, Hongda, Bo Zhang, Sergey Sosnovskiy, et al. "Study of Bipolar Inductively Isolated High-Voltage Pulse Source." Electronics 12, no. 18 (2023): 3864. http://dx.doi.org/10.3390/electronics12183864.

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To meet the application requirements of pulsed power technology in wastewater treatment and other aspects (for example, a scenario that requires a high-voltage pulse source that can output a pulse with a rising edge in the nanosecond range and a device that can stabilize the pulse under high-frequency conditions), this paper designed an inductively isolated bipolar high-voltage pulse source. It consists of three parts: the primary charging power supply, the isolated driver circuit, and the pulse-forming circuit. By using inductance instead of traditional resistance isolation, using the inducta

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Liu, Zhi Xin, Yong Wan Shi, and Hong Chen. "Modeling and Analysis of Crash Pulse of Vehicle Body Based on Tipped Equivalent Square Wave Method." Advanced Materials Research 211-212 (February 2011): 1007–11. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.1007.

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Crash pulse is an important parameter that can directly reflect the process of vehicle crash. And it is found that there exists an interrelationship between crash pulses and injuries of occupants. In this paper, a method of crash pulse modeling named TESW was adopted to simplify the real crash pulse with several characteristic parameters and then 37 groups characteristic parameters were obtained from 37 crash pulses of full-scale frontal tests, subsequently correlation analysis of crash pulse of body and injury of occupant were performed. And several rules that how these characteristic paramet

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Hu, L., B. Gao, J. K. Lv, S. C. Sun, Y. Hao, and G. F. Tu. "Halo Evolution of Hypereutectic Al-17.5Si Alloy Treated with High-Current Pulsed Electron Beam." Journal of Nanomaterials 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/806151.

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Halo evolution of an Al-17.5Si alloy surface after treatment with increasing pulse numbers of a high-current pulsed electron beam (HCPEB) was investigated. A halo is a ring microstructure resembling a bull’s eye. SEM results indicate that the nanocrystallization of halo induced by HCPEB treatment leads to gradual diffusion of the Si phase. Multiple pulses numbers cause the Si phase to be significantly refined and uniformly distributed. In addition, nanosilicon particles with a grain size of 30~100 nm were formed after HCPEB treatment, as shown by TEM observation. XRD results indicate that Si d

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Al-Zuhairi, Ala’a Hussein Alwan. "Estimation of Flexural Strength of Plain Concrete from Ultrasonic Pulse Velocity." Journal of Engineering 19, no. 2 (2023): 197–206. http://dx.doi.org/10.31026/j.eng.2013.02.03.

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The aim of this study is to propose mathematical expressions for estimation of the flexural strength of plain concrete members from ultrasonic pulse velocity (UPV) measurements. More than two hundredpieces of precast concrete kerb units were subjected to a scheduled test program. The tests were divided into two categories; non-destructive ultrasonic and bending or rupture tests. For each precast unit, direct and indirect (surface) ultrasonic pulses were subjected to the concrete media to measure their travel velocities. The results of the tests were mointered in two graphs so that two mathemat

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9

Li, Lin, Yuhua Cao, Tiantian Fen, and Chang Lv. "Effect of Single and Double Pulse MIG Welding Process Parameters on Microstructure and Properties of Aluminium Alloy." Journal of Physics: Conference Series 2390, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1742-6596/2390/1/012004.

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Abstract Lightweight aluminium alloys are widely used in many industries due to their advantageous mechanical properties. As welding is a popular method for joining aluminium alloy sheets, it is important to understand how the welding process affects the alloy’s performance. Here, we investigated the influence of various operating parameters during pulsed metal inert gas (MIG) welding of thin aluminium alloy plates on the input energy and metallurgical microstructure of the weld. A series of welding tests were performed using surface welding of AA6061 aluminium alloy plates under conditions of

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Takahashi, Masayuki, and Naofumi Ohnishi. "Theoretical and Numerical Studies of Dynamic Scaling of a Six-Degree-of-Freedom Laser Propulsion Vehicle." International Journal of Aerospace Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/801371.

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To estimate the flight reactions of a full-scale vehicle from reduced-scale tests, we constructed a scaling theory for the vehicle size, input energy, moment of inertia, and pulse frequency needed to maintain dynamic equivalence between a laboratory-scale and full-scale launch of a laser propulsion vehicle. The dynamic scaling law for a single pulse was constructed using translational and angular equations of motion. The analytical scaling was confirmed for a single-pulse incident using a fluid-orbit coupling simulator for the interaction between the blast wave and the vehicle. Motion equivale

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Khudhair, Zainab F., and Raad Sh Alnayli. "Preparation and Study Optical Limiting of Gold Nps by Pulsed Laser Ablation in Distilled Water (DDDW)." Materials Science Forum 1039 (July 20, 2021): 230–36. http://dx.doi.org/10.4028/www.scientific.net/msf.1039.230.

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Abstrac. In the present work, gold nanoparticle (Au NPs) was synthesis by pulsed laser ablation (PLA) by using Q-switched, (Nd: YAG) (E=80mJ) (λ=532,1064nm) and Number of pulses (500)pulse of the gold metal target in deionized water. The optical properties were studied with a UV-vis spectrophotometer which tests the absorbance spectra and comparison of the generated nanoparticles solution. atomic force microscope (AFM) results show that the grain size increase by decreasing wavelength. The optical limiter of the resulting colloidal solution was studied.

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Kim, Jaeuk U., Young Ju Jeon, Yu Jung Lee, Keun Ho Kim, and Jong Yeol Kim. "Novel Diagnostic Algorithm for the Floating and Sunken Pulse Qualities and Its Clinical Test." Evidence-Based Complementary and Alternative Medicine 2011 (2011): 1–10. http://dx.doi.org/10.1155/2011/813427.

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We propose a novel classification algorithm for the floating pulse and the sunken pulse using a newly defined coefficient (Cfs). To examine the validity of the proposed algorithm, we carried out a clinical test in which 12 oriental medical doctors made pairwise diagnoses on the pulses of volunteering subjects. 169 subjects were simultaneously diagnosed by paired doctors, and the diagnoses in 121 subjects were concordant, yielding an accuracy of 72% and a Matthews correlation coefficient of 0.42, which indicates reasonable agreement between doctors. Two sampleT-tests showed that subjects in the

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13

Scharnholz, Sigo, Bertrand Vergne, Jens Peter Konrath, Gontran Pâques, and Volker Zorngiebel. "Pulse Current Characterization of SiC GTO Thyristors." Materials Science Forum 679-680 (March 2011): 682–85. http://dx.doi.org/10.4028/www.scientific.net/msf.679-680.682.

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With a focus on pulsed power applications, this paper presents results of the pulse current characterization of GTO thyristors developed and fabricated within a previous ISL funded project. Limited by the pulse current capability of the bonding wire connection, the devices demonstrated to handle a peak current of up to 6 kA/cm2 (about 20 µs FWHM). Pulse tests of Al wires indicate that two 50 µm wires should be sufficient to test a 1 mm2 device up to a peak current of 30 kA/cm2.

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14

Berthou, Maxime, Pascal Bevilacqua, Jean Baptiste Fonder, and Dominique Tournier. "Repetitive Short-Circuit Tests on SiC VMOS Devices." Materials Science Forum 858 (May 2016): 812–16. http://dx.doi.org/10.4028/www.scientific.net/msf.858.812.

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SiC MOSFET are now commercially available and show promising performances when considering static losses, commutations and long term reliability. The devices may face short-circuit conditions and knowing their capibility in terms of critical time and repetitive fault is mandatory before integration in commercial systems. This paper presents the short-circuit performances for two families of commercial devices in terms of critical energy, time and repetitve SC stress. It shows that both devices show similar critical time but very different behavior when stressed under repetitive SC pulses. Thes

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15

Yan, Mu Tian, Yi Ting Liu, and Guan Ren Fang. "A Study on Pulse Generator for Micro WEDM of Polycrystalline Diamond." Key Engineering Materials 516 (June 2012): 498–503. http://dx.doi.org/10.4028/www.scientific.net/kem.516.498.

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This paper presents a new pulse generator for cutting of polycrystalline diamond (PCD) by micro wire-EDM. Three pulse control methods (AC power supply pulse control method, fixed pulse width modulation pulse control method and improved AC power supply pulse control method) have been proposed to achieve high frequency and low energy discharge pulses. The improved AC power supply pulse control method enables the pulse generator to provide a period of 20 μs off duty cycle followed by a period of duty cycle for reionization of the dielectric in the spark. Compared to the other two methods, the imp

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16

Toth, Bela, and Mihaly Megyery. "Evaluation of Pulse Tests With Noise Suppressing." SPE Formation Evaluation 12, no. 02 (1997): 132–36. http://dx.doi.org/10.2118/24531-pa.

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17

El-Khatib, Noaman. "Design and analysis of single pulse tests." Journal of Petroleum Science and Engineering 77, no. 1 (2011): 69–77. http://dx.doi.org/10.1016/j.petrol.2011.02.010.

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18

MATSUO, Akiko, Jiro KASAHARA, and Takuma ENDO. "Thrust-Performance Tests of Pulse Detonation Rockets." Proceedings of the Thermal Engineering Conference 2004 (2004): 41–42. http://dx.doi.org/10.1299/jsmeted.2004.41.

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KASAHARA, Jiro, Akiko MATSUO, and Takuma ENDO. "Thrust-Performance Tests of Pulse Detonation Rockets." Proceedings of the Thermal Engineering Conference 2004 (2004): 43–44. http://dx.doi.org/10.1299/jsmeted.2004.43.

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20

Hu, Yun, Xing Zhang, Wei Dong Zhang, Qing Sen Sun, Ling Yu Cao, and Yue Hu. "Application of a Programmable Partial Discharge Calibrator." Applied Mechanics and Materials 526 (February 2014): 288–91. http://dx.doi.org/10.4028/www.scientific.net/amm.526.288.

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This paper presents the application of a programmable partial discharge calibrator, which used to test the performance of four partial discharge measuring systems by injecting a program controlled known charge sequence into the device under test. Performance of linearity, response to opposite polarity pulses, pulse resolution time and response to random pulse sequence are compared and the results obtained show that the tests prescribed by the standards do not fully characterize the partial discharge measuring system behavior. A random partial discharge pulse sequence generated by this calibrat

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21

Behagh, Amir Masoud, Ali Reza Fadaei Tehrani, Hamid Reza Salimi Jazi, and Saeed Zare Chavoshi. "Investigation and optimization of pulsed electroforming process parameters for thickness distribution of a revolving nickel part." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 10 (2013): 2306–14. http://dx.doi.org/10.1177/0954406212473409.

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The objective of this research is to examine the influence of low frequency pulsed electroforming process parameters, such as current, pulse-on time, pulse-off time, and electrolyte temperature, to obtain good thickness uniformity. For this purpose, a pulsed electroforming system was designed and made. Three level, four-parameter experiments were designed using Taguchi method. The effect of parameters and optimal parameters combination were obtained through signal-to-noise ratio ( S/ N), analysis of variance (ANOVA) and Pareto ANOVA method. Also the regression analysis was performed to obtain

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22

Davies, I. W., C. Merla, A. Casciati, et al. "Push–pull configuration of high-power MOSFETs for generation of nanosecond pulses for electropermeabilization of cells." International Journal of Microwave and Wireless Technologies 11, no. 7 (2019): 645–57. http://dx.doi.org/10.1017/s1759078719000576.

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AbstractA power MOSFET-based push–pull configuration nanosecond-pulse generator has been designed, constructed, and characterized to permeabilize cells for biological and medical applications. The generator can deliver pulses with durations ranging from 80 ns up to 1 µs and pulse amplitudes up to 1.4 kV. The unit has been tested for in vitro experiments on a medulloblastoma cell line. Following the exposure of cells to 100, 200, and 300 ns electric field pulses, permeabilization tests were carried out, and viability tests were conducted to verify the performance of the generator. The maximum t

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23

Pevtsov, Valeria, Nathan D. Jacob, and Behzad Kordi. "Evaluation of Erosion Discharge Characteristics in Inclined Plane Tracking and Erosion Tests on Silicone Rubber under AC and DC Voltages." Energies 14, no. 19 (2021): 6051. http://dx.doi.org/10.3390/en14196051.

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This paper investigates partial discharge (PD) characteristics that lead to the erosion of silicone rubber (SR) polymer under AC stress and DC stress of both polarities. The experiments are performed on high temperature vulcanized (HTV) SR material samples. The inclined plane test apparatus, constructed in accordance with IEC 60587 requirements, is employed to produce the surface partial discharges and the resulting accelerated aging of the specimens. Two commercial instruments are used to obtain the PD data. A concurrent analysis of visual observations of discharge and PD data is performed to

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Navntoft, Charlotte Amalie, David M. Landsberger, Tania Rinaldi Barkat, and Jeremy Marozeau. "The Perception of Ramped Pulse Shapes in Cochlear Implant Users." Trends in Hearing 25 (January 2021): 233121652110611. http://dx.doi.org/10.1177/23312165211061116.

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The electric stimulation provided by current cochlear implants (CI) is not power efficient. One underlying problem is the poor efficiency by which information from electric pulses is transformed into auditory nerve responses. A novel stimulation paradigm using ramped pulse shapes has recently been proposed to remedy this inefficiency. The primary motivation is a better biophysical fit to spiral ganglion neurons with ramped pulses compared to the rectangular pulses used in most contemporary CIs. Here, we tested the hypotheses that ramped pulses provide more efficient stimulation compared to rec

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Chillè, C., J. Agresti, D. Ciofini, A. Mencaglia, I. Osticioli, and S. Siano. "Measurement of temperature gradients during Er:YAG laser irradiation of poly(vinyl alcohol)." Journal of Physics: Conference Series 2204, no. 1 (2022): 012071. http://dx.doi.org/10.1088/1742-6596/2204/1/012071.

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Abstract In this work the interaction of a pulsed Er:YAG (2940 nm) laser beam with mock-ups of poly(vinyl alcohol) (PVOH) has been investigated. Online time resolved temperature peaks induced by single-pulse laser irradiations were measured for the first time through the development of a dedicated setup based on a fast IR detector. Tests were performed using fluences ranging between 1.1-2.8 J/cm2 and pulse durations of 160-430μs. A multiple heterojunction IR photovoltaic detector with bandwidth 2-12 μm and risetime <7 ns was used to study the surface temperature transient upon Er:YAG laser

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Chen, Shengpeng, Runqiang Chi, Wuxiong Cao, et al. "Pulse Design of Constant Strain Rate Loading in SHPB Based on Pulse Shaping Technique." Materials 17, no. 12 (2024): 2931. http://dx.doi.org/10.3390/ma17122931.

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The Split Hopkinson pressure bar (SHPB) is widely used for characterizing the mechanical behavior of materials at high strain rates. One of the most challenging factors is achieving constant strain rate (CSR) loading of the specimen at a certain strain rate. Obtaining the effective incident pulse based on the experimental material for achieving CSR loading remains unresolved. This research focuses on obtaining the proper incident pulse for achieving constant strain rate loading using the pulse-shaping technique. A parameterized objective incident model in terms of the strain rate and quasi-sta

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Cossich, Vinicius, Marcio Antonio Vilas Boas, Naila Cristina Kepp, Allan Remor Lopes, and Dário Machado Júnior. "Statistical process control in pulsed drip irrigation systems." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 18 (January 11, 2024): 1–19. http://dx.doi.org/10.4136/ambi-agua.2933.

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Pulse drip application is a management option to prevent clogging and improve water-use efficiency. The measurement of distribution uniformity is opportune for pulse irrigation projects to ensure efficiency since the shorter the pulse time, the more negative influence the transition periods have. The objective of the present work was to monitor the quality of a drip irrigation system with different emitter models and different pulse times. The experiment was conducted under laboratory bench conditions, and 25 tests were performed for each pulse application (2, 3, 6 and 12 minutes) and emitter

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Muzal, Michał, and Marek Zygmunt. "Analysis of the Impact of Changes in Echo Signal Parameters on the Uncertainty of Distance Measurements in p-ToF Laser Rangefinders." Sensors 22, no. 16 (2022): 5973. http://dx.doi.org/10.3390/s22165973.

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The article presents results of research on the influence of changes in parameters of the digitally recorded echo signals on the uncertainty of pulsed Time-of-Flight (p-ToF) laser distance measurements. The main objective of the study was to evaluate the distance calculation method developed by the authors. This method is based on the acquisition of the full-waveform of the echo pulse signal and approximation of its shape by the second-degree polynomial (we called it SDPA for short). To determine the pulse transit time and measure the distance, the position of the vertex of this parabola is so

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Shalloo, R. J., L. Corner, C. Arran, et al. "Generation of laser pulse trains for tests of multi-pulse laser wakefield acceleration." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 829 (September 2016): 383–85. http://dx.doi.org/10.1016/j.nima.2016.02.044.

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Chmelíčková, Hana, Helena Hiklová, Lukáš Václavek, Jan Tomáštík, and Radim Čtvrtlík. "CHARACTERIZATION OF TITANIUM LASER WELDS." Acta Polytechnica CTU Proceedings 27 (June 11, 2020): 145–48. http://dx.doi.org/10.14311/app.2020.27.0145.

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Butt welding of commercially pure titanium Grade 1 and Ti6Al4V alloy sheets using a pulsed Nd:YAG laser KLS 246 - 102 LASAG were carried out to determine optimal values of pulse energy and pulse length to create completely penetrated weld. Surface peak power density of about 3.105 W.cm−2 was found as an optimal value. Weld dimensions, both face width and penetration depth, are found to be proportional to increasing energy and decreasing pulse length. Gentle sagging and root penetration were revealed by means of contact surface profilometry. The nanohardness tests on transverse cross-sections d

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Kochetkov, Vladimir V., Artem I. Melnikov, and Nikita M. Kochetkov. "Measurement of pulse current during high voltage tests using Rogowski coil with non-inverting integrator." Vestnik of Samara State Technical University. Technical Sciences Series 32, no. 2 (2024): 119–28. http://dx.doi.org/10.14498/tech.2024.2.7.

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The work is devoted to the development and modelling of the system of pulse current measurement during high-voltage tests and experiments. The proposed measurement system is based on the application of Rogowski coil with non-inverting integrator. The results of numerical modelling of the developed current measurement system are compared with the results of application of a low-inductance shunt resistor, Rogowski coil with passive RC-integrator and Rogowski coil with inverting active integrator in similar measurement systems. Various standard pulse currents including steep edge pulse (1/20 µs),

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SUGIMOTO, Fumio, and Mitsumasa FURUZUMI. "Permeability tests of rock by transient pulse method." Shigen-to-Sozai 105, no. 10 (1989): 727–31. http://dx.doi.org/10.2473/shigentosozai.105.727.

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Pfenning, T., C. Marinos, T. Howard, M. Hendrickson, and J. Hargreaves. "Mobile pulse power systems for electric gun tests." IEEE Transactions on Magnetics 29, no. 1 (1993): 1037–42. http://dx.doi.org/10.1109/20.195723.

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Okonogi, K., T. Nakamura, M. Yoshinaga, K. Ishijima, H. Akie, and H. Takano. "Pulse irradiation tests of rock-like oxide fuel." Journal of Nuclear Materials 274, no. 1-2 (1999): 167–73. http://dx.doi.org/10.1016/s0022-3115(99)00064-1.

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Chen, Haobo, Yongqian Liu, Pengda Cheng, Xinguang Zhu, and Guofeng Han. "Simulation Analysis of the Characteristics of Layered Cores during Pulse Decay Tests." Processes 12, no. 1 (2024): 146. http://dx.doi.org/10.3390/pr12010146.

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The permeability of low-permeability cores is generally measured using a pulse decay method. The core of low-permeability rocks, such as shale, often has a layered structure. The applicability of pulse decay testing for layered cores is not clear. In this study, the performance of the pulse decay method on layered cores was comprehensively investigated. Numerical simulations were conducted to investigate the influence of the interlayer permeability ratio, storativity ratio, layer thickness, interlayer location, and number of layers on the pulse decay pressure and pressure derivative curves, as

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Buchar, Jaroslav, and Jan Trnka. "Effect of stress pulse shape on the dynamic fracture of soda-lime glass." EPJ Web of Conferences 250 (2021): 06001. http://dx.doi.org/10.1051/epjconf/202125006001.

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The goal of this paper is to evaluate the tensile strength and fracture behavior of the soda lime glass under static and dynamic loading using Brazilian tests. The evaluation of the static tensile strength was performed using the universal testing machine; the fracture behavior under dynamic loading was studied using the Hopkinson Split Pressure Bar (HSPB) Technique. The dynamic loading is realized using the stress pulses of the different shape. In order to obtain the different loading stress pulses impact strikes made from four different materials (Steel, Teflon, Beech, and Polymer) were used

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Yang, Binbin, Daniel Arumí, Salvador Manich, et al. "RRAM Random Number Generator Based on Train of Pulses." Electronics 10, no. 15 (2021): 1831. http://dx.doi.org/10.3390/electronics10151831.

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In this paper, the modulation of the conductance levels of resistive random access memory (RRAM) devices is used for the generation of random numbers by applying a train of RESET pulses. The influence of the pulse amplitude and width on the device resistance is also analyzed. For each pulse characteristic, the number of pulses required to drive the device to a particular resistance threshold is variable, and it is exploited to extract random numbers. Based on this behavior, a random number generator (RNG) circuit is proposed. To assess the performance of the circuit, the National Institute of

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Khalid, Mariam, Saleem Azara Hussain, and Khalidah H. Al-Mayalee. "Characterization and comparison of titanium dioxide nanoparticles prepared by microwave and pulse laser ablation liquid methods." Journal of Kufa-Physics 16, no. 01 (2024): 26–41. http://dx.doi.org/10.31257/2018/jkp/2024/v16.i01.14196.

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This study synthesized titanium dioxide (TiO2) quickly and cheaply using microwaves and pulsed laser ablation. Titanium isopropoxide (Ti[OCH(CH3)2]4) was the precursor and deionized water (DIW) was the solvent and reducer for sub-micrometer particle production in microwave technique. TiO2 nanoparticles were synthesized in pulsed laser ablation liquid medium after a 5-minute preparation period in a 1200 W commercial microwave and a 1-hour annealing at 400°C. A Q-switched Nd:YAG laser with 480 mJ energy per pulse was used for 100, 200, and 300 pulses. Multiple methods, including XRD, BET, and ED

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Wang, Can, Lilianna E. Christman, Simon L. Klemperer, Jonathan M. Glen, Darcy K. McPhee, and Bin Chen. "Assessment of a claimed ultra-low frequency electromagnetic (ULFEM) earthquake precursor." Geophysical Journal International 229, no. 3 (2021): 2081–95. http://dx.doi.org/10.1093/gji/ggab530.

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SUMMARY The rate of occurrence of anomalous ultra-low frequency electromagnetic (ULFEM) pulses has been claimed to have increased days to weeks prior to the M5.4 2007 and M4.0 2010 Alum Rock earthquakes. We re-examine the previously reported ultra-low frequency (ULF: 0.01–10 Hz) magnetic data recorded at a QuakeFinder site located 9 km from the earthquake hypocentre, and compare to data from a nearby Stanford-USGS site located 42 km from the hypocentre, to analyse the characteristics of the pulses and assess their origin. Using pulse definitions and pulse-counting algorithms analogous to those

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Zhou, Huanyin, Zhanzhan Lu, Feiyan Xu, Jiewei Hu, and Yanhui Xie. "Study on FPGA-based implementation of high-speed trapezoidal shaping." Journal of Physics: Conference Series 2990, no. 1 (2025): 012026. https://doi.org/10.1088/1742-6596/2990/1/012026.

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Abstract When a nuclear accident occurs, the radiation dose rate is often high, and the count rate of nuclear pulses will be very large and these pulses are easy to pile up. Under this condition, digital trapezoidal shaping is suitable for use in digital multi-channel analyzers. Because of the high-count rate of the nuclear pulses and the relatively complex trapezoidal shaping algorithm, the implementation speed of the shaping algorithm will be crucial. If the algorithm is implemented with an embedded microprocessor, nuclear pulse shaping calculation will be operated slowly generally. High cou

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Szczupak, Paweł, and Tomasz Kossowski. "Response of Drone Electronic Systems to a Standardized Lightning Pulse." Energies 14, no. 20 (2021): 6547. http://dx.doi.org/10.3390/en14206547.

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This paper presents the results of experimental tests of the impulse response of selected, essential components of a drone. A standardized lightning pulse that is often used during immunity tests of electronic devices in the aviation industry was applied. A single-stroke voltage impulse generator, MIG0618SS, was capable of producing the desired pulses. The input voltage was injected into selected electronic circuits of the drone system and pulses were observed in different parts of the machine. This allowed us to build a model based on the transmittance of the circuits most exposed to lightnin

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Stankevič, Voitech, Kamilė Jonynaitė, Ahmed Taha, et al. "The Advancement and Utilization of Marx Electric Field Generator for Protein Extraction and Inducing Structural Alterations." Applied Sciences 14, no. 9 (2024): 3886. http://dx.doi.org/10.3390/app14093886.

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This study introduces an innovative two-range, 12-stage Marx pulse generator employing thyristor switches designed specifically for the electroporation of biological cells. The generator consists of two module capacitors of different capacitances (1 μF and 0.25 μF), which enable the generation of electrical pulses with different durations and amplitudes of up to 25 kV. Safety aspects, including overcurrent and overvoltage protection mechanisms, are implemented in both the software and the hardware. In the experimental section, the tests of the Marx generator with resistive load are described i

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Zhong, Xiang, Xicheng Gao, Huaxia Deng та ін. "Pulse-Width Multiplexing ϕ-OTDR for Nuisance-Alarm Rate Reduction". Sensors 18, № 10 (2018): 3509. http://dx.doi.org/10.3390/s18103509.

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A pulse-width multiplexing method for reducing the nuisance-alarm rate of a phase-sensitive optical time-domain reflectometer ( ϕ -OTDR) is described. In this method, light pulses of different pulse-widths are injected into the sensing fiber; the data acquired at different pulse-widths are regarded as the outputs of different sensors; and these data are then processed by a multisensor data fusion algorithm. In laboratory tests with a sensing fiber on a vibrating table, the effects of pulse-width on the signal-to-noise ratio (SNR) of the ϕ -OTDR data are observed. Furthermore, by utilizing the

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Schneidmiller, Evgeny, Matthias Dreimann, Marion Kuhlmann, Juliane Rönsch-Schulenburg, and Helmut Zacharias. "Generation of Ultrashort Pulses in XUV and X-ray FELs via an Excessive Reverse Undulator Taper." Photonics 10, no. 6 (2023): 653. http://dx.doi.org/10.3390/photonics10060653.

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The pulse duration in short-pulse schemes for Self-Amplified Spontaneous Emission Free Electron Lasers (SASE FELs) is limited by the FEL coherence time. A recently proposed concept allows to overcome the coherence time barrier and to obtain much shorter pulses. When the lasing part of an electron bunch is much shorter than the coherence time, one can suppress the radiation in the long main undulator while preserving microbunching within that short lasing slice. Then, a short radiation pulse is produced in a relatively short radiator. A possible suppression method, an excessive reverse undulato

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Bi, Zi-Juan, Xing-Hua Yao, Xiao-Juan Hu, et al. "Assessment Parameters for Arrayed Pulse Wave Analysis and Application in Hypertensive Disorders." Evidence-Based Complementary and Alternative Medicine 2022 (February 17, 2022): 1–13. http://dx.doi.org/10.1155/2022/6652028.

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Study on the objectivity of pulse diagnosis is inseparable from the instruments to obtain the pulse waves. The single-pulse diagnostic instrument is relatively mature in acquiring and analysing pulse waves, but the pulse information captured by single-pulse diagnostic instrument is limited. The sensor arrays can simulate rich sense of the doctor’s fingers and catch multipoint and multiparameter array signals. How to analyse the acquired array signals is still a major problem in the objective research of pulse diagnosis. The goal of this study was to establish methods for analysing arrayed puls

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Wang, Wei Kung, Julia Tsuei, Hsi Chan Chang, Tse Lin Hsu, and Yuh-Ying Lin Wang. "Pulse Spectrum Analysis of Chemical Factory Workers with Abnormal Blood Test." American Journal of Chinese Medicine 24, no. 02 (1996): 199–203. http://dx.doi.org/10.1142/s0192415x96000268.

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Double blind tests to check the correlation between pulse diagnosis and liver function tests were performed. Blood tests including T-Bil, D-Bil, SGOT and SGPT of 70 chemical factory workers were compared with pulse analysis. Special attention was paid to the indicators of liver and lung meridians for pulse diagnosis. It was found that using the criterion (1) C1 ≥ 3+ and C1 + C4 ≥ 4+ (hyperfunction) and (2) C1 ≤ 3-(hypofunction) as abnormal liver meridian (for C1, every 5% above normal give one +, every 5% below normal give one -; for C4 every 10% above normal give one +, every 10% below normal

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Han, Guofeng, Yang Chen, Min Liu, and Xiaoli Liu. "Differences in Performance of Models for Heterogeneous Cores during Pulse Decay Tests." Applied Sciences 9, no. 15 (2019): 3206. http://dx.doi.org/10.3390/app9153206.

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Shale and fractured cores often exhibit dual-continuum medium characteristics in pulse decay testing. Dual-continuum medium models can be composed of different flow paths, interporosity flow patterns, and matrix shapes. Various dual-continuum medium models have been used by researchers to analyze the results of pulse decay tests. But the differences in their performance for pulse decay tests have not been comprehensively investigated. The characteristics of the dual-permeability model and the dual-porosity model, the slab matrix, and the spherical matrix in pulse decay testing are compared by

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Ziółkowski, Arkadiusz, Agata Pudełko, Agnieszka Kazimierska, Zofia Czosnyka, Marek Czosnyka, and Magdalena Kasprowicz. "Analysis of relative changes in pulse shapes of intracranial pressure and cerebral blood flow velocity." Physiological Measurement 42, no. 12 (2021): 125004. http://dx.doi.org/10.1088/1361-6579/ac38bf.

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Abstract Objective. Analysis of relative changes in the shapes of pulse waveforms of intracranial pressure (ICP) and transcranial Doppler cerebral blood flow velocity (CBFV) may provide information on intracranial compliance. We tested this hypothesis, introducing an index named the ratio of pulse slopes (RPS) that is based on inclinations of the ascending parts of the ICP and CBFV pulse waveforms. It has hypothetically a simple interpretation: a value of 1 indicates good compliance and a value less than 1, reduced compliance. Here, we investigated the usefulness of RPS for assessment of intra

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Hidayat, Irpan, Audry Farrel Shang Rahardhani, and Gabriellela Aprilyanthi Suhardjo. "Utilizing hammer tests and ultrasonic pulse velocity to ascertain the compressive strength of concrete." IOP Conference Series: Earth and Environmental Science 1324, no. 1 (2024): 012006. http://dx.doi.org/10.1088/1755-1315/1324/1/012006.

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Abstract This study aimed to estimate the compressive strength of concrete in an existing building using non-destructive testing methods, specifically the hammer test and ultrasonic pulse velocity. The hammer test employed two types of tools, type N, which reads the rebound number (R), and another type that reads the rebound coefficient (Q) value. In the study, 40 column samples were tested, revealing concrete quality measurements of 30.5 MPa and 27.8 MPa obtained from hammer test type N and rebound coefficient (Q), respectively. Meanwhile, the ultrasonic pulse velocity reading was 3288 m/s. T

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Gago, Mauricio, Steffen Antusch, Alexander Klein, et al. "Thermal Shock and Synergistic Plasma and Heat Load Testing of Powder Injection Molding Tungsten-Based Alloys." Journal of Nuclear Engineering 6, no. 3 (2025): 25. https://doi.org/10.3390/jne6030025.

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Powder injection molding (PIM) has been used to produce nearly net-shaped samples of tungsten-based alloys. These alloys have been previously shown to have favorable characteristics when compared with standard ITER-grade tungsten. Six different alloys were produced with this method: W-1TiC, W-2Y2O3, W-3Re-1TiC, W-3Re-2Y2O3, W-1HfC and W-1La2O3-1TiC. These were tested alongside ITER-grade tungsten in the PSI-2 linear plasma device under ITER-relevant plasma and heat loads to assess their suitability for use in a fusion reactor. All materials showed good behavior when exposed to the lower pulse

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