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Journal articles on the topic 'Modified frequency'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Chen, Xi, Ciming Zhou, Dian Fan, et al. "Modified frequency-shifted interferometer: encoding wavelength into phase." Chinese Optics Letters 18, no. 10 (2020): 101203. http://dx.doi.org/10.3788/col202018.101203.

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2

Divya, Divya, and Mr Pawan Kumar Mishra. "Frequency Domain Digital Image Segmentation based on a Modified kMeans." International Journal of Innovative Research in Computer Science & Technology 5, no. 4 (2017): 317–22. http://dx.doi.org/10.21276/ijircst.2017.5.4.4.

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3

Hwang, J. S., K. C. Chang, and G. C. Lee. "Modified Frequency‐Domain Data Processing." Journal of Engineering Mechanics 115, no. 10 (1989): 2333–39. http://dx.doi.org/10.1061/(asce)0733-9399(1989)115:10(2333).

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4

Lo̸nnum, L. F., and J. S. Johannessen. "Dual-frequency modified C/V technique." Electronics Letters 22, no. 9 (1986): 456. http://dx.doi.org/10.1049/el:19860310.

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5

Aboutanios, E. "A Modified Dichotomous Search Frequency Estimator." IEEE Signal Processing Letters 11, no. 2 (2004): 186–88. http://dx.doi.org/10.1109/lsp.2003.821676.

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6

Akande, Akinyinka Olukunle, Olusola Kunle Akinde, Oluwadara Joel Odeyinka, Abolaji Okikiade Ilori, Matthew Olusegun Adigun, and Sunday Adeola Ajagbe. "Development of a modified propagation model of a wireless mobile communication system in a 4G network." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 6 (2023): 6489–500. https://doi.org/10.11591/ijece.v13i6.pp6489-6500.

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Pathloss is a key element that causes signal deterioration in the channel as the signal power reduces inversely with propagation distance, this deterioration experienced by the channel is majorly as a result of reflection, absorption, and scattering of the signal. This study however takes into consideration the radio path loss for precise base station (BS), frequency, and power adjustment prediction evaluated over a frequency of 2.3 GHz. With a distance range between 0.1 and 1.5 km for collection of data on the measured received signal strength (MRSS), five empirical models and a modified mode

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7

Shao, Xiaolang, Taiyang Hu, Zelong Xiao, and Jinyu Zhang. "Frequency Diverse Array Beampattern Synthesis With Modified Sinusoidal Frequency Offset." IEEE Antennas and Wireless Propagation Letters 20, no. 9 (2021): 1784–88. http://dx.doi.org/10.1109/lawp.2021.3096980.

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8

Mubasher, Hussain, Arbab: Naeem, and Khan Adeel. "High Frequency Modeling of Transformer Using Black Box Frequency Response Analysis." International Journal of Engineering Works (ISSN: 2409-2770) 4, no. 10 (2017): 190–95. https://doi.org/10.5281/zenodo.1037918.

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Lightning Surges consequently induce high frequency overvoltage to transformers. Therefore, it is alluring to study the transfer voltage of lightning surges from primary to secondary side of transformer. Keeping in mind the end goal to do lead this review, high frequency Siemens power transformer of rating 25KVA, 25KV/400V is to be examined. In this paper, an advanced and modified high frequency model of transformer is presented for protection of load against lightning transients. Suggested model is modified form of N.A Sabiha model and based on black box, two ports four terminal network theor

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9

Oxley, C. H., and A. J. Holden. "Modified Fukui model for high-frequency MESFETs." Electronics Letters 22, no. 13 (1986): 690. http://dx.doi.org/10.1049/el:19860472.

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10

Meriakri, Vyacheslav V., and Ivan P. Nikitin. "Frequency-selective properties of modified dielectric gratings." International Journal of Infrared and Millimeter Waves 17, no. 10 (1996): 1769–78. http://dx.doi.org/10.1007/bf02069588.

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11

Ottonello, C., and S. Pagnan. "Modified frequency domain kurtosis for signal processing." Electronics Letters 30, no. 14 (1994): 1117–18. http://dx.doi.org/10.1049/el:19940777.

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12

Leung, S. H., Y. Xiong, and W. H. Lau. "Modified Kay's method with improved frequency estimation." Electronics Letters 36, no. 10 (2000): 918. http://dx.doi.org/10.1049/el:20000685.

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13

Latousakis, J., and J. Drakopoulos. "A modified formula for frequency-magnitude distribution." Pure and Applied Geophysics PAGEOPH 125, no. 5 (1987): 753–64. http://dx.doi.org/10.1007/bf00878031.

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14

Wu, Hao, Yongqiang Cheng, and Hongqiang Wang. "Modified CRLB Based Optimal Sampling Frequency Selection in Phase and Frequency Estimation." IEEE Access 7 (2019): 36879–87. http://dx.doi.org/10.1109/access.2019.2904792.

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15

Aumiler, D., T. Ban, N. Vujičić, S. Vdović, H. Skenderović, and G. Pichler. "Characterization of an optical frequency comb using modified direct frequency comb spectroscopy." Applied Physics B 97, no. 3 (2009): 553–60. http://dx.doi.org/10.1007/s00340-009-3630-9.

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16

Yamada, Kou, Tatsuya Sakanushi, Takaaki Hagiwara, et al. "The Parameterization of all Stabilizing Modified Repetitive Controllers for Multiple-Input/Multiple-Output Plants with the Specified Input-Output Frequency Characteristic." Applied Mechanics and Materials 36 (October 2010): 273–81. http://dx.doi.org/10.4028/www.scientific.net/amm.36.273.

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In this paper, we examine the parameterization of all stabilizing modified repetitive controllers for multiple-input/multiple-output plants with the specified input-output frequency characteristic. The parameterization of all stabilizing modified repetitive controllers for non-minimum phase systems was solved by Yamada et al. However, when we design a stabilizing modified repetitive controller using the parameterization by Yamada et al., the input-output frequency characteristic of the control system cannot be settled so easily. The input-output frequency characteristic of the control systems

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17

ZHANG, Long-Long, Ji-Hua ZHANG, Xiao-Lang CHEN, Hong-Wei CHEN, and Chuan-Ren YANG. "Modified silica ceramic for frequency selective surface radome." Journal of the Ceramic Society of Japan 123, no. 1442 (2015): 937–41. http://dx.doi.org/10.2109/jcersj2.123.937.

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18

Dong, Zhen-Hui, Xiao-Hua Yang, Ya-Nan Guo, Ying Mei, Yu-Qi Li, and Jian-Qiang Li. "Modified frequency computation method for optimal environmental flows." Thermal Science 16, no. 5 (2012): 1539–43. http://dx.doi.org/10.2298/tsci1205539d.

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The paper describes a modified frequency computation method to calculate the optimal environmental flows. This method was used to design monthly environmental flows in Lancang river. The environmental flows calculated by the method are compared with those by the ecological flow method and the Tennant method, revealing its effectiveness.

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19

Lukashev, N. A., V. V. Davydov, and V. Y. Rud. "Modified quantum frequency standard on Hg-199 ions." Journal of Physics: Conference Series 2086, no. 1 (2021): 012060. http://dx.doi.org/10.1088/1742-6596/2086/1/012060.

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Abstract The world around us depends on devices capable of producing or maintaining a signal with an extreme precision. Quantum frequency standards are the answer to this problem. This article presents a modified version of newly developed quantum frequency standard based on trapping Hg-199 ions by magnetic field. The new prototype was developed a while ago and now it was modified due to algorithm improvements and renewed digital hardware, analog and digital circuitry being reordered. Results for Allan deviation show 3 % improvement for long-term frequency stability and more than 5 % for short

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20

Kong, Hai Yan, and Ji Huan He. "Frequency of Bubble Formation in Modified Bubble Electrospinning." Advanced Materials Research 843 (November 2013): 40–48. http://dx.doi.org/10.4028/www.scientific.net/amr.843.40.

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Bubble-electrospinning is one of the most straightforward ways to fabricate polymer solution into nanofibers. The key point of the technology is to control bubble size and formation frequency. A modified bubble electrospinning set-up is designed to control the size of polymer bubbles and frequency of bubble formation in the spinning process. A PVA (10wg %) solution is used in the experiment for fabricate polymer solution into nanofibers and superfine nanofibers are obtained with the average diameter of about 200nm.

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21

Rozzi, William A., and David Casasent. "Frequency-domain synthesis of modified matched spatial filters." Optics Letters 10, no. 11 (1985): 517. http://dx.doi.org/10.1364/ol.10.000517.

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22

Li, J., and A. K. Krishnamurthy. "A modified frequency-weighted Itakura spectral distortion measure." IEEE Transactions on Acoustics, Speech, and Signal Processing 37, no. 10 (1989): 1614–17. http://dx.doi.org/10.1109/29.35406.

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23

Holesha, Kenneth G. "Hearing aid microphone with modified high‐frequency response." Journal of the Acoustical Society of America 98, no. 4 (1995): 1831. http://dx.doi.org/10.1121/1.413392.

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24

Chwastek, Krzysztof. "Frequency behaviour of the modified Jiles–Atherton model." Physica B: Condensed Matter 403, no. 13-16 (2008): 2484–87. http://dx.doi.org/10.1016/j.physb.2008.01.010.

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25

Chadwick, V. J., and P. T. Bray. "The modified Hung method of multiresolution frequency analysis." Signal Processing 14, no. 1 (1988): 25–35. http://dx.doi.org/10.1016/0165-1684(88)90042-4.

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26

Yang, Jian, Hongsheng Xi, and Wei Guo. "Robust Modified Newton Algorithm for Adaptive Frequency Estimation." IEEE Signal Processing Letters 14, no. 11 (2007): 879–82. http://dx.doi.org/10.1109/lsp.2007.903272.

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27

Das, S., C. Ghosh, O. G. Voevodina, Yu M. Andreev, and S. Yu Sarkisov. "Modified GaSe crystal as a parametric frequency converter." Applied Physics B 82, no. 1 (2005): 43–46. http://dx.doi.org/10.1007/s00340-005-2024-x.

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28

Abo-Elyousr, Farag K., and Adel M. Sharaf. "A novel modified robust load frequency controller scheme." Energy Systems 11, no. 4 (2019): 1175–98. http://dx.doi.org/10.1007/s12667-019-00341-3.

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29

Ye, Qunshan, Wenzhuo Dong, Shipei Wang, and Heng Li. "Research on the Rheological Characteristics and Aging Resistance of Asphalt Modified with Tourmaline." Materials 13, no. 1 (2019): 69. http://dx.doi.org/10.3390/ma13010069.

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Tourmaline modified asphalt (TMA) binders were prepared with different modifier types and contents in this research. The routine properties, rheological properties, and aging resistance were evaluated to research the function of tourmaline on the performances of asphalt binders. Test results show that the storage stability can be improved significantly by the smaller particle size and negative-ion treated surface of tourmaline modifier. It indicates that the stiffness and rutting-resistance of TMA binder can be enhanced significantly, and the elastic component of the viscoelastic characteristi

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30

Ramon, Cabello-Ruiz, Tecpoyotl-Torres Margarita, Torres-Jacome Alfonso, Grimalsky Volodymyr, Gerardo Vera-Dimas Jose, and Vargas-Chable Pedro. "A Novel Displacement-amplifying Compliant Mechanism Implemented on a Modified Capacitive Accelerometer." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 4 (2017): 1858–66. https://doi.org/10.11591/ijece.v7i4.pp1858-1866.

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The micro-accelerometers are devices used to measure acceleration. They are implemented in applications such as tilt-control in spacecraft, inertial navigation, oil exploration, etc. These applications require high operating frequency and displacement sensitivity. But getting both high parameter values at the same time is difficult, because there are physical relationships, for each one, where the mass is involved. When the mass is reduced, the operating frequency is high, but the displacement sensitivity decreases and vice versa. The implementation of Displacement-amplifying Compliant Mechani

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31

LUNDIN, B. V., and C. KRAFFT. "Modified electron whistler dispersion law." Journal of Plasma Physics 67, no. 2-3 (2002): 149–61. http://dx.doi.org/10.1017/s0022377801001301.

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A modified electron whistler dispersion law is derived in the cold-plasma approximation for analytical treatment and simplified numerical calculations of wave propagation in a wide range of ratios ωc/ωp of electron gyro- to plasma frequencies if the wave frequency is much less than ωp. The net contribution of ions to the wave dispersion law is expressed through the value of the lower-hybrid resonance frequency ωlhr only. This approximate dispersion law is valid in a wide frequency domain, that is, from the range of ωlhr until the domain where the contribution of ions can be neglected. A compar

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32

Pan, Mengguan, and Baixiao Chen. "MIMO High Frequency Surface Wave Radar Using Sparse Frequency FMCW Signals." International Journal of Antennas and Propagation 2017 (2017): 1–16. http://dx.doi.org/10.1155/2017/7514916.

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The heavily congested radio frequency environment severely limits the signal bandwidth of the high frequency surface wave radar (HFSWR). Based on the concept of multiple-input multiple-output (MIMO) radar, we propose a MIMO sparse frequency HFSWR system to synthesize an equivalent large bandwidth waveform in the congested HF band. The utilized spectrum of the proposed system is discontinuous and irregularly distributed between different transmitting sensors. We investigate the sparse frequency modulated continuous wave (FMCW) signal and the corresponding deramping based receiver and signal pro

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33

Abbad, Brahim, Bjørn Ursin, and Milton J. Porsani. "A fast, modified parabolic Radon transform." GEOPHYSICS 76, no. 1 (2011): V11—V24. http://dx.doi.org/10.1190/1.3532079.

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We propose a fast and efficient frequency-domain implementation of a modified parabolic Radon transform (modified PRT) based on a singular value decomposition (SVD) with applications to multiple removal. The problem is transformed into a complex linear system involving a single operator after merging the curvature-frequency parameters into a new variable. A complex SVD is applied to this operator and the forward transform is computed by means of a complex back-substitution that is frequency independent. The new transform offers a wider curvature range at signal frequencies than the other PRT i

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34

Li, Xiang Fu, and Li Jia Wang. "Reconditioning Equalizer Filter for Non-Constant Envelop Signals." Applied Mechanics and Materials 713-715 (January 2015): 1222–25. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.1222.

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A technique for a reconditioning equalizer filter for non-constant envelope signals is described. The input to a transmitter chain is modified by a reconditioning equalizer filter, prior to being applied to the transmitter. The reconditioning equalizer filter modifies and smoothens the amplitude of the signal. The modified and smoothened signal has its peaks reduced which results in lower Crest Factor. The input to the reconditioning equalizer filter could be a baseband, intermediate frequency (IF) or radio frequency (RF) signal. When the signal is an IF or RF signal, it needs to be down-conve

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35

Kimuya, Alex Mwololo. "Modeling Signal Integrity in High-Frequency and Radio Frequency Circuits: A Comparison of Ohm's Law Variants." Emerging Technologies and Engineering Journal 1, no. 2 (2024): 1–29. http://dx.doi.org/10.53898/etej2024121.

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High-frequency circuit performance is significantly impacted by impedance variations, particularly within the low-resistance regime. Traditional Ohm's Law-based modeling approaches often fail to accurately predict circuit behavior in these conditions, leading to design inaccuracies and potential system failures. The Standard Ohm's Law-based model's prediction of infinite current as resistance approaches zero is unrealistic and hinders its application in practical scenarios. Despite recognizing these limitations, existing models have not comprehensively addressed the complex impedance behavior

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36

N., Edward, A. Shairi N., Othman A., Zakaria Z., and D. Saiful Bahri I. "Reconfigurable modified wilkinson power divider using PIN diode switch." Bulletin of Electrical Engineering and Informatics 9, no. 3 (2020): 1067–73. https://doi.org/10.11591/eei.v9i3.2174.

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In this paper, a reconfigurable modified Wilkinson Power Divider (WPD) was proposed. The operating frequencies of the proposed design were either at 2.5 GHz or 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. This proposed design is reconfigurable in terms of its operating frequency by using PIN diode switches. PIN diode switch was used in this design to reconfigure the microstrip line length. By varying the bias voltage of the PIN diode to +5 V or -5 V, the proposed modified WPD can either operate at 2.5 GHz or 3.5 GHz. Rogers RO4350 (er=3.48, h=0.508 mm) was

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37

VELASCO, G. A. M., and M. DÖRFLER. "Sampling time-frequency localized functions and constructing localized time-frequency frames." European Journal of Applied Mathematics 28, no. 5 (2016): 854–76. http://dx.doi.org/10.1017/s095679251600053x.

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We study functions whose time-frequency content are concentrated in a compact region in phase space using time-frequency localization operators as a main tool. We obtain approximation inequalities for such functions using a finite linear combination of eigenfunctions of these operators, as well as a local Gabor system covering the region of interest. These would allow the construction of modified time-frequency dictionaries concentrated in the region.

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38

Sun, Xiaolong, Yikang Zhang, Qinyuan Peng, Junshen Yuan, Zhi Cang, and Jianbing Lv. "Study on adaptability of rheological index of nano-PUA-modified asphalt based on geometric parameters of parallel plate." Nanotechnology Reviews 10, no. 1 (2021): 1801–11. http://dx.doi.org/10.1515/ntrev-2021-0106.

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Abstract To clarify the influence of geometric parameters of parallel plate on rheological properties of polyurea elastomer (PUA)-modified asphalt, nano-PUA powder was prepared, and nano-PUA powder modifier was modified by using high-speed shearing apparatus. The apparent viscosity of modified asphalt was evaluated by Brookfield viscosity. The rheological parameters of PUA-modified asphalt were determined by comparing the rheological test results of temperature scanning, frequency scanning, and multiple stress creep recover test using 8 and 25 mm parallel plates. Results indicated that the hig

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39

Wang, Wei, Baomin Chen, and Junan Shen. "Zero Shear Viscosity of Hybrid Modified Asphalts and Its Gray Correlation with Other Properties." Materials 15, no. 20 (2022): 7056. http://dx.doi.org/10.3390/ma15207056.

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The viscosity of modified asphalt binders is the most important property to ensure the durability of open-graded friction course (OGFC). Zero shear viscosity (ZSV) is considered to be the optimum result to reflect the rutting characterization of high viscosity modified asphalt binders, compared with conventional vacuum capillary viscosity. However, there are few reports on using ZSV to evaluate the material characteristics of hybrid modified asphalt binders and to establish the relationship between ZSV and other properties. In this paper, a high viscosity hybrid modified asphalt binder was pre

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40

Krueson, Nidchakarn, H. Manuspiya, Pitak Laoratanakul, and H. Ishida. "Dielectric Properties Enhancement in Polybenzoxazine Composite at Multi-Frequency Range." Advanced Materials Research 55-57 (August 2008): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.105.

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This research proposed a novel nano barium strontium titanate (BST) powder- polybenzoxazine composite as a new dielectric material. In this work, the dielectric properties of a surface-treated BST powder-polybenzoxazine composite were studied. The surface of the BST powders were modified by using three different chemicals: 3-aminopropyl-trimethoxysilane, benzoxazine monomer and phthalocyanine. The distribution of the BST powders in the polybenzoxazine matrix was observed by SEM. The dielectric constants of the composites with a function of frequency (1 kHz–10 MHz) were investigated. It was fou

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41

Liu, Xing, Hong Yuan Xing, Gang Liu, Wei Fu, and Wen Bo Zeng. "Performance Evaluation of Anti-Ultraviolet Ageing Bitumen with Combined Modification Based on Dynamic Rheological Test." Materials Science Forum 993 (May 2020): 1373–81. http://dx.doi.org/10.4028/www.scientific.net/msf.993.1373.

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Based on the rheological property master curve, a new definition of ageing index was proposed for styrene-butadiene-styrene block copolymer (SBS) modified bitumen. The UV ageing resistance of the combined-modifier modified SBS bitumen was evaluated. Twelve different methods of combined modification were designed with three kinds of modifiers: ultraviolet absorber (Tinuvin 770), organic montmorillonite (OMMT) and layered double hydroxide (LDHs). With modified SBS bitumen, short-term ageing (TFOT) and laboratory ultraviolet ageing (UV) were performed. The dynamic shear rheometer (DSR) was used t

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42

Ihmsen, Harald, Michael Schywalsky, Regina Plettke, Michael Priller, Florian Walz, and Helmut Schwilden. "Concentration–Effect Relations, Prediction Probabilities (Pk), and Signal-to-noise Ratios of Different Electroencephalographic Parameters during Administration of Desflurane, Isoflurane, and Sevoflurane in Rats." Anesthesiology 108, no. 2 (2008): 276–85. http://dx.doi.org/10.1097/01.anes.0000300074.04200.b1.

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Background The authors investigated the suitability of different electroencephalographic parameters to quantify the anesthetic effect of desflurane, isoflurane, and sevoflurane in rats. Methods Ten male Sprague-Dawley rats were anesthetized in a randomized crossover design with maximum values of 11% desflurane, 2.1% isoflurane, and 3.5% sevoflurane. The electroencephalogram was recorded with implanted electrodes and a wireless telemetry system. Concentration-effect relations and signal-to-noise ratios were determined for the approximate entropy and for the median frequency and the spectral edg

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43

ALI SHAH, SYED WARIS, CHAUDHRY AHMED KHAN, SIKANDER ALI MALIK, AHMED WAQAS, AJMEL MUNIR TARRAR, and IRTIZA AHMED BHUTTA. "MODIFIED ALVARADO SCORE." Professional Medical Journal 17, no. 04 (2010): 546–50. http://dx.doi.org/10.29309/tpmj/2010.17.04.2956.

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objective: To compare the frequency of inflamed appendix in suspected patients of acute appendicitis having Modified Alvarado Score (MAS) of 7 or more with patients having MAS of 6 or below. Design: Comparative cross sectional study. Place and duration of study: The study was carried out at Surgical Departments of Combined Military Hospital (CMH) and Military Hospital (MH) Rawalpindi from April 2006 to April 2007. Material and Methods: This study involved 100 patients who were operated with provisional diagnosis of acute appendicitis. Preoperatively MAS of each patient was calculated and the p

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44

Walden, A. T. "Robust deconvolution by modified Wiener filtering." GEOPHYSICS 53, no. 2 (1988): 186–91. http://dx.doi.org/10.1190/1.1442453.

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Deconvolution in the presence of additive noise is a well known problem for which there exists a Wiener filter which spectrally whitens while also suppressing the noise. A simple variant of this standard Wiener filter incorporates a parameter p which is intended to allow further weight to be given to noise suppression. This filter is often called a modified Wiener filter. To design such a filter, one must know the frequency characteristics of the wavelet precisely, plus the spectra of the input and additive noise. Typically, some appropriate estimate of the frequency function of the wavelet is

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45

Saleh, Mahdi, Samir-Mohamad Omar, Eric Grivel, and Oussama Bazzi. "A modified stepped frequency phase coding radar waveform designed for the frequency domain algorithm." Digital Signal Processing 88 (May 2019): 101–15. http://dx.doi.org/10.1016/j.dsp.2019.01.020.

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46

Xia, Yao, and Jinjie Liu. "A Modified Nonlinear Lorentz Model for Third-Order Optical Nonlinearity." Mathematics 13, no. 8 (2025): 1354. https://doi.org/10.3390/math13081354.

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In this study, we propose a new nonlinear polarization model that modifies the polarization equation to account for the material’s nonlinear response. Specifically, the nonlinear restoring force in our model is reformulated as an electric field-dependent function, derived from the nonlinear Lorentz model. Additionally, we perform a comparative analysis of the Kerr model, the Duffing model, the nonlinear Lorentz model, and our modified nonlinear Lorentz model (MNL) by solving Maxwell’s equations using the finite-difference time-domain (FDTD) method. This research focuses on the third-order nonl

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47

Zhang, Xiao, Yi Zhou, and Yongjie Xue. "Biochars from Cotton Seed, Camelia Seed Shell, and Coffee Ground in Modification of Asphalt: Fundamental Properties, Rheological Performance, and Inhibition of VOC Emissions." Materials 18, no. 7 (2025): 1504. https://doi.org/10.3390/ma18071504.

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With the increasing requirement for asphalt modification, a new environmentally friendly asphalt modifier is needed. In this study, three varieties of biomass, cotton seed (CO), camelia seed shell (CA), and coffee ground (CG), were chosen for biochar preparation and asphalt modification to find an environmentally friendly asphalt modifier. A segregation test was applied to evaluate the storage stability of the modified asphalt. A dynamic shear rheometer (DSR) temperature sweep and frequency sweep were used to characterize the high-temperature performance. The low-temperature performance was ev

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48

Yerzhan, Assel, Balausa Nakisbekova, Zhanat Manbetova, et al. "Using modified Chebyshev functions for approximation in 5G technologies." International Journal of Electrical and Computer Engineering (IJECE) 14, no. 6 (2024): 6508. http://dx.doi.org/10.11591/ijece.v14i6.pp6508-6518.

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This research addresses the critical challenge of broadband matching in radio engineering, focusing on enhancing phase-frequency response (PFC) linearity across wide frequency bands. A novel approach, utilizing modified Chebyshev functions, demonstrates significant potential in reducing phase distortions within 5G technology applications. Unlike traditional Chebyshev functions, this method incorporates strategically placed transmission zeros— complex conjugate pairs on the s-variable complex plane—without increasing the filter circuit's order. This innovation results in a low-order filter circ

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49

Ferreira, R. L., and E. D. R. Vieira. "FLOW AROUND MODIFIED CIRCULAR CILYNDERS." Revista de Engenharia Térmica 3, no. 1 (2004): 62. http://dx.doi.org/10.5380/reterm.v3i1.3482.

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The flow around a circular cylinder has awaken the attention of differentresearchers since the historic Strouhal's work of 1878. Ever since, manyexperimental and numeric works have been carried out in order todetermine the relationship between the vortex shedding frequency and theflow regime. Recently, a number of studies have been developed usingseveral small modifications in circular cylinder. In this work a circularcylinder modified with a longitudinal concave notch, has been tested inorder to determine the relationship between the non-dimensional v

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Melnichuk, Sergey V. "Modified Frequency Method of Structural-Parametric Identification of Systems." Journal of Automation and Information Sciences 47, no. 8 (2015): 63–73. http://dx.doi.org/10.1615/jautomatinfscien.v47.i8.60.

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