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Journal articles on the topic 'DBF method'

Author: Grafiati

Published: 11 September 2021

Last updated: 17 July 2025

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1

Stefani, Megah. "The Effectiveness of WFH (Work From Home) during the Covid-19 Pandemic to Support the Provision of Exclusive Breastfeeding Practices with Direct Breastfeeding (DBF) for Working Moms." Amerta Nutrition 6, no. 1SP (2022): 64–70. http://dx.doi.org/10.20473/amnt.v6i1sp.2022.64-70.

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Background: The work pattern that occurs during the pandemic is working from home (Work from Home). Before the pandemic, breastfeeding mothers who worked normatively had the right to leave for three months. This regulation often becomes an obstacle for breastfeeding mothers who work to practice exclusive breastfeeding for 6 months using Direct Breast-Feeding (DBF). Objectives: This study aims to analyze the effectiveness of WFH on the implementation of exclusive breastfeeding with DBF in working mothers. Methods: The research design is a retrospective case control. The subject category was div

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Suo, Zhiyong, Jingjing Ti, Hongli Xiang, Leru Zhang, Chao Xing, and Tingting Wang. "Airborne Elevation DBF-TOPS SAR/InSAR Method Based on LOS Motion Compensation and Channel Error Equalization." Remote Sensing 14, no. 18 (2022): 4542. http://dx.doi.org/10.3390/rs14184542.

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Digital beamforming (DBF) TOPS SAR in elevation is a new synthetic aperture radar (SAR) system, which has the advantage of wide swath coverage and a high signal-to-noise ratio (SNR). In this paper, considering the phase preservation demand for interferometric SAR (InSAR) processing, the complete processing chain for DBF-TOPS SAR/InSAR in elevation is proposed with a wide beam angle and channels’ amplitude and phase errors. Firstly, we analyze the airborne motion compensation method along the line-of-sight direction for TOPS SAR with squint angle. Furthermore, for the large-range beam angle of

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Cohen, Jonathan, Ilya Skoletsky, Rina Chen, Daniel Weiss, and Pierre Singer. "A New Monitor to Measure Dermal Blood Flow in Critically Ill Patients: A Preliminary Study." ISRN Critical Care 2013 (April 22, 2013): 1–6. http://dx.doi.org/10.5402/2013/578316.

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Background. Conditions of reduced perfusion are characterized by redistribution of blood flow away from the skin to more vital organs. Objectives. To assess the efficacy of a noninvasive, dermal blood flow (DBF) monitor in detecting changes in perfusion in critically ill patients. Methods. Eleven adult, critically ill patients in a general ICU were studied. DBF, finger plethysmography, and invasive mean arterial pressure (MAP) were recorded over an 8-hour period. DBF was measured using the DermaFlow DBF monitor via a skin probe placed on the anterior chest wall. Sensitivity was evaluated by vi

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Chen, Hao, Feng Ming, Liang Li, and Guikun Liu. "Elevation Multi-Channel Imbalance Calibration Method of Digital Beamforming Synthetic Aperture Radar." Remote Sensing 14, no. 17 (2022): 4350. http://dx.doi.org/10.3390/rs14174350.

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The digital beamforming synthetic aperture radar (DBF-SAR) is proposed by scholars as a promising solution to overcome the constraint of the minimum antenna area of the traditional single-channel SAR to achieve high resolution and wide swath (HRWS) by scan-on-receive (SCORE) in the elevation multiple channel. However, the inevitable channel imbalance between the elevation channels of DBF-SAR will degrade the DBF-SAR image quality. In this paper, we present a method to estimate the sampling time delay error, amplitude error and phase error based on the external calibration data. For the samplin

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Wang, Shenjing, Yifan Sun, Feng He, Zaoyu Sun, Pengcheng Li, and Zhen Dong. "DBF Processing in Range-Doppler Domain for MWE SAR Waveform Separation Based on Digital Array-Fed Reflector Antenna." Remote Sensing 12, no. 19 (2020): 3161. http://dx.doi.org/10.3390/rs12193161.

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With the rapid development of the multiple-input multiple-output synthetic aperture radar (MIMO SAR) system, the demands for miniaturization and high gain of antenna are increasing. The digital array-fed reflector antenna has such virtues so that it can play an important role in such system. However, the geometric models and signal models based on a reflector antenna are considerably different from the directly radiating planar antenna. The signal processing for the reflector antenna is more complex and difficult. As a result, the applications of the reflector antenna in SAR system are not as

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Augustyn, Alexander, Roshal Patel, Ethan Ludmir, et al. "RADT-13. EARLY CONCURRENT IMMUNOTHERAPY WITH STEREOTACTIC RADIOSURGERY IS ASSOCIATED WITH PROLONGED SURVIVAL AND DECREASED DISTANT BRAIN FAILURE IN PATIENTS WITH NEWLY DIAGNOSED MELANOMA BRAIN METASTASES (MBM)." Neuro-Oncology 22, Supplement_2 (2020): ii184. http://dx.doi.org/10.1093/neuonc/noaa215.766.

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Abstract INTRODUCTION We evaluated outcomes of patients with newly diagnosed MBM treated with concurrent immune checkpoint inhibition (ICI) and stereotactic radiosurgery (SRS) (concurrentTx), defined as treatment delivery within 30 days of each other. METHODS Screening of 2,617 melanoma patients who received ICI (anti-CTLA4/anti-PD1/both) between 2011-2019 identified 151 pts who received concurrentTx for MBM. Among these, 51 had newly-diagnosed MBM and received no prior ICI or SRS, and were included in the current study. Overall survival (OS) and distant brain failure (DBF) were estimated usin

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Finch, W. Holmes. "The MIMIC Model as a Tool for Differential Bundle Functioning Detection." Applied Psychological Measurement 36, no. 1 (2012): 40–59. http://dx.doi.org/10.1177/0146621611432863.

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Increasingly, researchers interested in identifying potentially biased test items are encouraged to use a confirmatory, rather than exploratory, approach. One such method for confirmatory testing is rooted in differential bundle functioning (DBF), where hypotheses regarding potential differential item functioning (DIF) for sets of items (bundles) are developed based on the substantive nature of the items and expected differences in group performance. Most often, analyses of these bundles for DBF have been conducted using simultaneous item bias test (SIBTEST). The goal of the current study was

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Jung, Sung Min, and Youn Young Hur. "Metabolites changes after pre-bloom gibberellic acid (GA3) application for inducing seedless grape." NOVEMBER 2020, no. 13(02):2020 (November 11, 2020): 94–103. http://dx.doi.org/10.21475/poj.13.02.20.2696.

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Gibberellic acid (GA3) treatment is a useful method for inducing seedless grape berries in the seeded grape bunch before flowering. In this work, we applied 100 ppm of GA3 on ‘Tamnara’ grape flower cluster at 14 days before flowering to find metabolites significantly related to seedlessness. Three bunches of grape flower samples were collected at nine different stages (Day before full bloom; DBF13, 10, 7, 5, 2, flowering (0) and day after full bloom; DAF 2, 5, 9). Metabolites of each collected sample were analyzed using GC-MS with derivatization method (MSTFA). Metabolite contents of GA3 treat

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Yan Wang and Shanjia Xu. "Mutual coupling calibration of DBF array with combined optimization method." IEEE Transactions on Antennas and Propagation 51, no. 10 (2003): 2947–52. http://dx.doi.org/10.1109/tap.2003.817978.

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Nan, Liu, Guo Kaisi, Zhang Zhenghe, and Zhang Linrang. "A Single Receive Channel DBF Method for Ultra-Wideband Radar." IEEE Access 7 (2019): 176024–35. http://dx.doi.org/10.1109/access.2019.2957493.

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Chang, Sheng, Yunkai Deng, Yanyan Zhang, et al. "An Advanced Echo Separation Scheme for Space-Time Waveform-Encoding SAR Based on Digital Beamforming and Blind Source Separation." Remote Sensing 14, no. 15 (2022): 3585. http://dx.doi.org/10.3390/rs14153585.

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To achieve high-resolution and wide-swath (HRWS) imaging, a space-time waveform-encoding (STWE) spaceborne synthetic aperture radar (SAR) system is adopted. In rugged terrain, the beam-pointing mismatch problem will appear when the traditional digital beamforming (DBF) technique is used to separate the received echoes. This problem leads to decreasing the received echo’s gain, deteriorating the quality of the image product and making the interpretation of SAR image difficult. To address this problem, an advanced echo separation scheme for STWE spaceborne SAR based on the DBF and blind source s

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Kim, Yoon-SL, David Schvartzman, Tian-You Yu, and Robert D. Palmer. "Fast Adaptive Beamforming for Weather Observations with Convolutional Neural Networks." Remote Sensing 15, no. 17 (2023): 4129. http://dx.doi.org/10.3390/rs15174129.

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Polarimetric phased array radar (PAR) can achieve high temporal resolutions for improved meteorological observations with digital beamforming (DBF). The Fourier method performs DBF deterministically, and produces antenna radiation patterns with fixed sidelobe levels and angular resolution by pre-computing the beamforming weights based on the geometry of receivers. In contrast, the Capon method performs DBF adaptively in response to the changing environment by computing the beamforming weights from the received signals at multiple channels. However, it becomes computationally expensive as the n

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Huang, Yiheng, Wang Wang, and Jinzhen Cao. "Boron fixation effect of quaternary ammonium compounds (QACs) on sodium fluoroborate (NaBF4)-treated wood." Holzforschung 72, no. 8 (2018): 711–18. http://dx.doi.org/10.1515/hf-2017-0201.

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AbstractAiming at a better leaching resistance of borate-treated wood, the quaternary ammonium compounds (QACs), didecyl dimethyl ammonium chloride (DDAC) and benzalkonium chloride (BAC) were reacted with sodium tetrafluoroborate (NaBF4). The anti-fungal properties of the resulting didecyl dimethyl ammonium tetrafluoroborate (DBF) and benzalkonium tetrafluoroborate (BBF) were tested by the Petri dish method. Poplar (Populus tomentosaCarr.) and Southern pine (Pinusspp.) blocks were treated through a two-step method at three molar ratios of NaBF4to the QACs. The retentions of the reactive compon

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Zhou, Jinfeng, Jingan Wang, Jinliang Wei, and Bugao Xu. "Extracting fiber length distributions from dual-beard fibrographs with the Levenberg–Marquardt algorithm." Textile Research Journal 90, no. 1 (2019): 37–48. http://dx.doi.org/10.1177/0040517519858762.

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Fiber length is a critical cotton fiber property that impacts yarn strength, yarn evenness, and ultimately fabric strength and appearance. In this paper, a new fiber fibrograph method was presented for accurate measurements of fiber length distributions (FLDs). The method, called the dual-beard fibrograph (DBF), was based on the transmission image of a combed sample with two tapered fiber ends/beards, and the approximation of the fibrograph with a series of triangular base functions. A desktop scanner was used to generate the transmission image of a dual-beard sample, and essential image-proce

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Naji, Ali, Thamer M. Jamel M. Jamel, and Hassan F. khazaal. "Using of Deep Learning in Beamforming Antenna Array." Wasit Journal of Engineering Sciences 12, no. 4 (2024): 40–51. https://doi.org/10.31185/ejuow.vol12.iss4.564.

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Digital beamforming (DBF) is a crucial technology for large antenna arrays, offering precise control over beam steering. This research introduces a novel method to enhance millimeter wave transmission by incorporating DBF with long-term memory (LSTM) based deep learning Our system utilizes digital signal processing and LSTM networks to optimize beamforming parameters instead of relying on traditional analog beamforming. The objective is to achieve high spectral efficiency. The methodology is executed in the programming language MATLAB and the obtained simulation outcomes validate a substantial

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Hughes, Ryan T., Emory R. McTyre, Michael LeCompte, et al. "Clinical Outcomes of Upfront Stereotactic Radiosurgery Alone for Patients With 5 to 15 Brain Metastases." Neurosurgery 85, no. 2 (2018): 257–63. http://dx.doi.org/10.1093/neuros/nyy276.

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Abstract BACKGROUND The role of primary stereotactic radiosurgery (SRS) for patients with >4 brain metastases (BM) remains controversial. OBJECTIVE To compare the outcomes of patients treated with upfront SRS alone for 1, 2 to 4, and 5 to 15 BM and assess for predictors of clinical outcomes in the 5 to 15 BM group. METHODS A total of 478 patients treated with upfront SRS were stratified by number of lesions: 220 had 1 BM, 190 had 2 to 4 BM, and 68 patients had 5 to 15 BM. Overall survival and whole brain radiotherapy-free survival were estimated using the Kaplan–Meier method. The cumulative

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Gal, Omer, Sreenija Yarlagadda, Matthew D. Hall, et al. "NIRL-04 BRAIN METASTASES DISTRIBUTION WIDTH (BMDW): A NOVEL METRIC TO PREDICT DISTANT BRAIN FAILURE FOLLOWING STEREOTACTIC RADIOSURGERY IN PATIENTS WITH MULTIPLE BRAIN METASTASES." Neuro-Oncology Advances 6, Supplement_1 (2024): i20—i21. http://dx.doi.org/10.1093/noajnl/vdae090.065.

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Abstract INTRODUCTION We introduce a method of predicting clinical outcomes in newly diagnosed brain metastases (BM) patients after upfront stereotactic radiosurgery (SRS), based on a novel metric - brain metastases distribution width (BMDW) – which measures the amount of variation in BM volume. METHODS BMDW was defined as the coefficient of variation of mean BM volume (mBMV) per patient and was calculated by dividing the standard deviation of the mBMV (SD-mBMV) by the mBMV and multiplying by 100, to yield a percentage value representing BM volume heterogeneity. Patients were classified by BMD

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Zhou, Tianqi, Qingzhong Zhu, Hangyi Zhu, et al. "DRAG: A Novel Method for Automatic Geological Boundary Recognition in Shale Strata Using Multi-Well Log Curves." Processes 11, no. 10 (2023): 2998. http://dx.doi.org/10.3390/pr11102998.

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Ascertaining the positions of geological boundaries serves as a cornerstone in the characterization of shale reservoirs. Existing methods heavily rely on labor-intensive manual well-to-well correlation, while automated techniques often suffer from limited efficiency and consistency due to their reliance on single well log data. To overcome these limitations, an innovative approach, termed DRAG, is introduced, which uses deep belief forest (DBF), principal component analysis (PCA), and an enhanced generative adversarial network (GAN) for automatic layering recognition in logging curves. The app

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Boué, Pierre, Philippe Roux, Michel Campillo, and Benoit de Cacqueray. "Double beamforming processing in a seismic prospecting context." GEOPHYSICS 78, no. 3 (2013): V101—V108. http://dx.doi.org/10.1190/geo2012-0364.1.

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The use of larger numbers of sensors is becoming more common at the large, continental scale for deep-structure imaging in seismology, and at a smaller scale with exploration geophysics objectives. Seismic arrays require array processing from which new types of observables contribute to a better understanding of the wave propagation complexity. From among these array processing techniques, this study focuses on a way to select and identify different phases between two source-receiver arrays based on the double beamforming (DBF) method. At the exploration geophysics scale, the goal is to identi

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Scarborough, Nelson, Brian Barnes, and Safdar Khan. "1078 Performance of Improved Forms of Demineralized Bone Fiber Allografts in Rabbit Posterolateral Spine Fusion Model." Neurosurgery 70, Supplement_1 (2024): 183–84. http://dx.doi.org/10.1227/neu.0000000000002809_1078.

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INTRODUCTION: Biologic fusion is often critical for successful spine procedures. Autograft remains the Gold Standard bone graft due to osteogenic properties but has limitations in practice. New bone graft forms that efficiently incorporate autograft or bone marrow aspirate (BMA) and provide osteoinductive and osteoconductive properties were evaluated in the current study. Grafts were made using demineralized bone fibers (DBF) produced by a patented method that provides long fibers that can effectively entangle autograft and be formed into open cylinders (PAK) that contain and prevent autograft

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Chan, Michael, Emory McTyre, Michael Soike, et al. "RADI-31. MULTI-INSTITUTIONAL VALIDATION OF BRAIN METASTASIS VELOCITY, A RECENTLY DEFINED PREDICTOR OF OUTCOMES FOLLOWING STEREOTACTIC RADIOSURGERY." Neuro-Oncology Advances 1, Supplement_1 (2019): i28. http://dx.doi.org/10.1093/noajnl/vdz014.123.

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Abstract INTRODUCTION: Brain metastasis velocity (BMV) is a prognostic metric that describes the recurrence rate of new brain metastases after initial treatment with radiosurgery (SRS). We have previously risk stratified patients into high, intermediate, and low-risk BMV groups, which correlates with overall survival (OS). We sought to externally validate BMV in a multi-institutional setting. METHODS: Patients from nine academic centers were treated with upfront SRS; the validation cohort consisted of data from eight institutions not previously used to define BMV. Patients were classified by B

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Jäger, Marc, Rolf Scheiber, and Andreas Reigber. "Robust, Model-Based External Calibration of Multi-Channel Airborne SAR Sensors Using Range Compressed Raw Data." Remote Sensing 11, no. 22 (2019): 2674. http://dx.doi.org/10.3390/rs11222674.

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The paper describes a method for the accurate calibration of multi-channel SAR instruments, such as those required to support SAR polarimetry, single-pass interferometry and digital beam-forming (DBF), on the basis of dedicated SAR acquisitions containing reference targets with known properties. Unlike conventional approaches, the method is based entirely on the analysis of range-compressed raw data. It leverages the pulse-by-pulse analysis of amplitude, phase and delay variations observed within the range histories of reference targets to fully characterize and correct propagation direction d

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Zhao, Jie. "One Method for Target Location Used in a Radar System Based on External Illuminator and Accuracy Analysis." Advanced Materials Research 462 (February 2012): 550–55. http://dx.doi.org/10.4028/www.scientific.net/amr.462.550.

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An applicable passive location algorithm of target based on single fixed-site illuminator of opportunity is introduced in this paper. The azimuth can be acquired using DBF (digital beam formation) technique and angle-measuring via amplitude comparison. Based on Time Difference of Arrival (TDOA), the distance between the target and the radar station is achievable. Finally, the accuracy of location is analyzed, and the computer simulation results are presented.

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Wisaeng, Kittipol. "Retinal Blood-Vessel Extraction Using Weighted Kernel Fuzzy C-Means Clustering and Dilation-Based Functions." Diagnostics 13, no. 3 (2023): 342. http://dx.doi.org/10.3390/diagnostics13030342.

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Automated blood-vessel extraction is essential in diagnosing Diabetic Retinopathy (DR) and other eye-related diseases. However, the traditional methods for extracting blood vessels tend to provide low accuracy when dealing with difficult situations, such as extracting both micro and large blood vessels simultaneously with low-intensity images and blood vessels with DR. This paper proposes a complete preprocessing method to enhance original retinal images before transferring the enhanced images to a novel blood-vessel extraction method by a combined three extraction stages. The first stage focu

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Sun, Jinghao, Nan Guan, Rongxiao Shi, Guozhen Tan, and Wang Yi. "Schedulability Analysis for Timed Automata With Tasks." ACM Transactions on Embedded Computing Systems 20, no. 5s (2021): 1–26. http://dx.doi.org/10.1145/3477020.

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Research on modeling and analysis of real-time computing systems has been done in two areas, model checking and real-time scheduling theory. In model checking, an expressive modeling formalism such as timed automata (TA) is used to model complex systems, but the analysis is typically very expensive due to state-space explosion. In real-time scheduling theory, the analysis techniques are highly efficient, but the models are often restrictive. In this paper, we aim to exploit the possibility of applying efficient analysis techniques rooted in real-time scheduling theory to analysis of real-time

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Ji, Zhenyuan, Chunlei Yi, Junhao Xie, and Yang Li. "The Application of JDL to Suppress Sea Clutter for Shipborne HFSWR." International Journal of Antennas and Propagation 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/825350.

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This paper deals with the problem of sea clutter suppression for shipborne high frequency surface wave radar (HFSWR) based on the joint domain localized (JDL) adaptive processing algorithm. The performance of the novel method is compared with 2D FFT plus digital beamforming (FFT-DBF) and orthogonal weight in different azimuths. The results based on simulated and real data show that the novel method provides higher detection performance than others.

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Saetova, L., and E. Galeev. "Development of algorithm of reading database files in the system of interactive accounting of extra budgetary funds given of the university." Bulletin of Science and Practice 4, no. 6 (2018): 205–11. https://doi.org/10.5281/zenodo.1289847.

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Nowadays automation of the work of higher education institutions is an important task. Information support is necessary for effective management of not only educational process, but whole financial and economic activities of the university. One of the subtasks of accounting of higher educational institutions is an accounting for extra-budgetary funds given from educational activities. Automation of this process can be implemented in different ways using various software. One of the actual solutions is the development of web-application working in a local network of the university. This article

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Tsubono, TAKAKI, Nobuhito MORI, Masafumi MATSUYAMA, and Shin-ichi SAKAI. "Automatic Estimation Method for Surface Currents from Doppler Spectrum Measured by DBF Marine Radar." PROCEEDINGS OF COASTAL ENGINEERING, JSCE 54 (2007): 1446–50. http://dx.doi.org/10.2208/proce1989.54.1446.

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Wang, Hui, Sili Wu, Qiang Zhao, Shichao Zheng, and Mingxi Xiao. "A New Method of Ka DBF ATI-SAR for Full Ocean Current Vectors Inversion." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 15 (2022): 9785–95. http://dx.doi.org/10.1109/jstars.2022.3220292.

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Fischer, C., M. Goppelt, H. L. Blöcher, and J. Dickmann. "Minimizing interference in automotive radar using digital beamforming." Advances in Radio Science 9 (July 29, 2011): 45–48. http://dx.doi.org/10.5194/ars-9-45-2011.

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Abstract. Millimetre wave radar is an essential part of automotive safety functions. A high interference tolerance, especially with other radar sensors, is vital. This paper gives an overview of the motivation, the boundary conditions and related activities in the MOSARIM project funded by the European Union and concerned with interference mitigation in automotive radars. Current and planned activities considering Digital Beamforming (DBF) as a method for interference mitigation are presented.

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Shen, Haoran, Jian Li, Xiaozhi Li, Ruiqi Cheng, Kexin Hao, and Ziwei Wang. "Theoretical Proof and Implementation of Digital Beam Control and Beamforming Algorithm for Low Earth Orbit Satellite Broadcast Signal Reception Processing Terminal." Electronics 14, no. 3 (2025): 440. https://doi.org/10.3390/electronics14030440.

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Compared to analog beamforming, digital beamforming offers better self-calibration and lower sidelobe performance, which has a profound impact on improving low Earth orbit receiver performance. The Digital Beamforming (DBF) module in the low Earth orbit satellite broadcast signal reception terminal can use digital phase shifting to compensate for the phase differences caused by path and spatial distance variations due to inconsistent Radio Frequency (RF) channel delays. This compensation ensures in-phase summation, thereby achieving maximum energy reception in the desired direction. Although D

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Qiu, Jinsong, Zhimin Zhang, Zhen Chen, et al. "A Novel Real-Time Echo Separation Processing Architecture for Space–Time Waveform-Encoding SAR Based on Elevation Digital Beamforming." Remote Sensing 14, no. 1 (2022): 213. http://dx.doi.org/10.3390/rs14010213.

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Space–time waveform-encoding (STWE) SAR can receive echoes from multiple sub-swaths simultaneously with a single receive window. The echoes overlap each other in the time domain. To separate the echoes from different directions, traditional schemes adapt single-null steering techniques for digital receive beam patterns. However, the problems of spaceborne DBF-SAR, in practice, such as null extension loss, terrain undulation, elevation angle of arrival extension, and spaceborne antenna beam control, make the conventional scheme unable to effectively separate the echoes from different sub-swaths

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Jiang, Yan, Lingyu Wang, Qing Ling, et al. "Spaceborne HRWS-SAR-GMTI System Design Method with Optimal Configuration." Remote Sensing 16, no. 12 (2024): 2148. http://dx.doi.org/10.3390/rs16122148.

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The spaceborne high-resolution and wide-swath synthetic aperture radar (HRWS-SAR) system combined with the ground moving target indication (GMTI) mode provides a promising prospect in the realization of wide-area target surveying and high-resolution target imaging. In this paper, a system design method is proposed for an HRWS-SAR-GMTI system with ideal reconstruction configuration. In the proposed method, the whole azimuth receiving channels are uniformly divided into multiple groups, where HRWS-SAR imaging is implemented in each sub-group and then GMTI processing is performed based on the rec

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Gupta, U. "Study of temporal variation of vegetation indices and phenology of tropical deciduous broadleaf forest in eastern India." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 28, 2014): 569–72. http://dx.doi.org/10.5194/isprsarchives-xl-8-569-2014.

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In the recent years study of vegetation variation has taken significance as a quintessential part of a bigger research agenda of climate change. This study has attempted to (a) Analyse the inter-annual and seasonal variation of vegetation (b) Observe the variation in phenological transition dates of tropical deciduous broadleaf forest (DBF) in Eastern India from 2003 to 2012. The study was conducted on 1500 sq. km area of dense forest in the districts of West Singhbhum and Sundargarh. MODIS EVI data of 250 meter resolution was used. Land cover mask was used to study only the DBF pixels. Least

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Zhou, Fang, Jiaqiu Ai, Zhangyu Dong, Jiajia Zhang, and Mengdao Xing. "A Novel MIMO–SAR Solution Based on Azimuth Phase Coding Waveforms and Digital Beamforming." Sensors 18, no. 10 (2018): 3374. http://dx.doi.org/10.3390/s18103374.

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In multiple-input multiple-output synthetic aperture radar (MIMO–SAR) signal processing, a reliable separation of multiple transmitted waveforms is one of the most important and challenging issues, for the unseparated signal will degrade the performance of most MIMO–SAR applications. As a solution to this problem, a novel APC–MIMO–SAR system is proposed based on the azimuth phase coding (APC) technique to transmit multiple waveforms simultaneously. Although the echo aliasing occurs in the time domain and Doppler domain, the echoes can be separated well without performance degradation by implem

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Zuo, Weihua, Caipin Li, Sheng Zhang, et al. "Research on Azimuth DBF Method of HRWS SPC MAB SAR Imaging Mode with Non-Ideal Antenna Mode." Remote Sensing 16, no. 9 (2024): 1552. http://dx.doi.org/10.3390/rs16091552.

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Single-phase center multiple azimuth beam (SPC MAB) mode is an effective method for high-resolution wide-swath (HRWS) SAR imaging. The traditional azimuth spectrum reconstruction method for SPC MAB mode is based on the combination scheme from which fake targets along the azimuth direction arise because the inter-beam interference is not considered. When the real antenna mode is inconsistent with the ideal one, the disadvantages of the combination scheme become more serious. In this paper, based on the basic theory of the low-pass, band-limited, multiple-channel under-sampling and reconstructio

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Janaetri, Komang Ratih. "DIFFERENCES IN SKILL OF MATERNAL BREASTFEEDING BEFORE AND AFTER GIVING A VIDEO ABOUT DIRECT BREASTFEEDING (DBF) METHOD." Jurnal Ilmiah Kebidanan (The Journal Of Midwifery) 12, no. 2 (2024): 142–48. http://dx.doi.org/10.33992/jik.v12i2.3219.

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Lin, Yi, Kai Yang, Min Guo, and Yunqi Fu. "Elimination of Motion-Induced Phase Based on Double-Time Switching Scheme for SAA FMCW Radar." Electronics 8, no. 7 (2019): 786. http://dx.doi.org/10.3390/electronics8070786.

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Due to the low cost and straightforward structure, the switch antenna array (SAA) frequency modulated continuous wave (FMCW) radar has been widely applied in many fields. However, the motion-induced phase always leads to inaccurate direction estimation of moving targets. Here, we proposed an elimination method of the motion-induced phase for the SAA FMCW radar. A double-time switching scheme (DTSS) is used for the reception of echo signals. Elimination of motion-induced phase is completed without estimating velocity, which can avoid the ambiguous velocity estimation problem. Additionally, the

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Huang, Duan, Yue He, Shilin Zou, Yuejun Song, and Hong Chi. "Variation Patterns and Climate-Influencing Factors Affecting Maximum Light Use Efficiency in Terrestrial Ecosystem Vegetation." Forests 16, no. 3 (2025): 528. https://doi.org/10.3390/f16030528.

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Accurately understanding the changes in global light-response parameters (i.e., maximum light use efficiency, LUEmax) is essential for improving the simulation of terrestrial ecosystem’s photosynthetic carbon cycling under climate change, but a comprehensive understanding and assessments are still lacking. In this study, LUEmax was quantified using data from 23 global flux stations, and the change patterns in LUEmax across various vegetation types and climate zones were analyzed. The extent of significant increases or decreases in LUEmax during different phenological stages of vegetation growt

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Baloochian, Hossein, Hamid Reza Ghaffary, and Saeed Balochian. "Enhancing Fingerprint Image Recognition Algorithm Using Fractional Derivative Filters." Open Computer Science 7, no. 1 (2017): 9–16. http://dx.doi.org/10.1515/comp-2017-0002.

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Abstract One of the most important steps in recognizing fingerprint is accurate feature extraction of the input image. To enhance the accuracy of fingerprint recognition, an algorithm using fractional derivatives is proposed in this paper. The proposed algorithm uses the definitions of fractional derivatives Riemann-Liouville (R-L) and Grunwald-Letnikov (G-L) in two sections of direction estimation and image enhancement for the first time. Based on it, new mask of fractional derivative Gabor filter is calculated. The proposed fractional derivative-based method enhances the image quality. This

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Šajn, Viktor. "Semi-Analytical Multidimensional Algorithm for Aircraft Design Optimisation: Student Design Build Fly (DBF) Competition." Strojniški vestnik – Journal of Mechanical Engineering 65, no. 11-12 (2019): 728–40. http://dx.doi.org/10.5545/10.5545/sv-jme.2019.6459.

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The winner of American Institute of Aeronautics and Astronautics (AIAA)/Textron Aviation/Raytheon Missile Systems Design/Build/Fly (DBF) Competition 2019 was Edvard Rusjan team from Faculty of Mechanical Engineering, University of Ljubljana, Slovenia. Edvard Rusjan team use a strict scientific approach to beat opposing teams from most prestigious US Universities. Team developed a semi-analytic multidimensional algorithm for aircraft design optimization with an aim to maximize competition score in accordance with the competition rules. Two intermediate prototype models were produced and tested

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Šajn, Viktor. "Semi-Analytical Multidimensional Algorithm for Aircraft Design Optimisation: Student Design Build Fly (DBF) Competition." Strojniški vestnik – Journal of Mechanical Engineering 65, no. 11-12 (2019): 728–40. http://dx.doi.org/10.5545/sv-jme.2019.6459.

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The winner of American Institute of Aeronautics and Astronautics (AIAA)/Textron Aviation/Raytheon Missile Systems Design/Build/Fly (DBF) Competition 2019 was Edvard Rusjan team from Faculty of Mechanical Engineering, University of Ljubljana, Slovenia. Edvard Rusjan team use a strict scientific approach to beat opposing teams from most prestigious US Universities. Team developed a semi-analytic multidimensional algorithm for aircraft design optimization with an aim to maximize competition score in accordance with the competition rules. Two intermediate prototype models were produced and tested

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Murala, Subrahmanyam, R. P. Maheshwari, and R. Balasubramanian. "Multiresolution LBP Correlogram for Texture Image Indexing and Retrieval." Advanced Materials Research 403-408 (November 2011): 908–14. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.908.

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A new image indexing and retrieval algorithm known as local binary pattern (LBP) correlogram is presented in this paper. LBP histogram captures only the patterns distribution in a texture while the spatial correlation between the pair of patterns is gathered by LBP correlogram. Multi-resolution texture decomposition and color correlation has been efficiently used in the proposed method where multi-resolution texture images are computed using Gaussian filter for collection of LBPs from these particular textures. Eventually, feature vectors are constructed by making into play the auto-correlatio

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Niu, Yinxi, Wensheng Chen, Hui Zeng, Zhenhua Gan, and Baoping Xiong. "Optimizing sEMG Gesture Recognition: Leveraging Channel Selection and Feature Compression for Improved Accuracy and Computational Efficiency." Applied Sciences 14, no. 8 (2024): 3389. http://dx.doi.org/10.3390/app14083389.

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In the task of upper-limb pattern recognition, effective feature extraction, channel selection, and classification methods are crucial for the construction of an efficient surface electromyography (sEMG) signal classification framework. However, existing deep learning models often face limitations due to improper channel selection methods and overly specific designs, leading to high computational complexity and limited scalability. To address this challenge, this study introduces a deep learning network based on channel feature compression—partial channel selection sEMG net (PCS-EMGNet). This

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Gong, Jing, and Siyu Zhong. "Selection of wavelet generating function in voltage interruption detection." Journal of Physics: Conference Series 2666, no. 1 (2023): 012020. http://dx.doi.org/10.1088/1742-6596/2666/1/012020.

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Abstract When using wavelet for voltage interruption detection, improper selection can lead to detection failure due to the differences in wavelet characteristics and the diversity of the generating function. Based on the analysis of wavelet characteristics, the modulus maximum principle is used to compare the detail coefficients after wavelet decomposition, and a method that should be followed for selecting the generating function is proposed. Here are four important points to consider: First, choose orthogonal wavelets that can decrease redundancy. Second, symmetry does not have a major effe

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Maheswari, V. Uma, Golla Vara Prasad, and S. Viswanadha Raju. "Facial expression analysis using local directional stigma mean patterns and convolutional neural networks." International Journal of Knowledge-based and Intelligent Engineering Systems 25, no. 1 (2021): 119–28. http://dx.doi.org/10.3233/kes-210057.

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This paper represents automatic facial expression analysis method named Local Directional Stigma Mean Patterns (LDSMP) for automatic facial expression analysis and image retrieval using content based facial expression image retrieval and CNN. The traditional local patterns such as Local Binary Patterns (LBP) and Local Ternary Patterns (LTP) are applied for face recognition and expression analysis, calculated using relationship between the center pixel and neighboring pixels. The proposed method calculates the eight directional difference values then divided into the three ranges based on thres

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Liew, Fui Kiew, Sinin Hamdan, Md Rezaur Rahman, et al. "Synthesis and Characterization of Cellulose from Green Bamboo by Chemical Treatment with Mechanical Process." Journal of Chemistry 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/212158.

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Bamboo cellulose was prepared by chemical process involving dewaxing, delignification, and mercerization process. Four samples namely, green bamboo fiber (GBF), dewaxed bamboo fiber (DBF), delignified bamboo fiber (DLBF), and cellulose fiber (CF) had been analysed. FTIR and TGA analysis confirmed the removal of hemicellulose and lignin at the end stage of the process. FTIR results reveal that the D-cellulose OH group occurred at 1639 cm−1region. SEM micrograph showed that mercerization leads to fibrillation and breakage of the fiber into smaller pieces which promote the effective surface area

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Ni, Lisa, Christina Phuong, Jie Jane Chen, et al. "MMAP-11 VOLUMETRIC STUDY OF BRAIN METASTASES IN EGFR-POSITIVE NSCLC TREATED WITH OSIMERTINIB WITH OR WITHOUT CNS-DIRECTED RADIATION THERAPY." Neuro-Oncology Advances 4, Supplement_1 (2022): i17. http://dx.doi.org/10.1093/noajnl/vdac078.067.

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Abstract BACKGROUND In patients with brain metastases (BM) from EGFR-positive non-small cell lung cancer (NSCLC), recent data indicated that treating with CNS-penetrant tyrosine kinase inhibitors such as osimertinib may enable deferring radiotherapy (RT) in select patients. The purpose of this study was to describe the radiographic response of newly diagnosed BM to osimertinib with or without stereotactic radiosurgery or whole brain radiotherapy, to identify parameters that may guide early versus delayed salvage RT. METHODS In this single-institution retrospective study, 35 patients with 186 n

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Ibrahim, Noraini, and Norhaiza Ahmad. "Comparative performance of support vector regressions for accurate streamflow predictions." Malaysian Journal of Fundamental and Applied Sciences 13, no. 4-1 (2017): 325–30. http://dx.doi.org/10.11113/mjfas.v13n4-1.876.

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Obtaining accurate streamflow predictions can be challenging due to the inherent variabilities and complex nonlinear nature in streamflow generation processes. Support vector regression model is an effective forecasting tool to forecast streamflow as it is able to capture the nonlinearity in the data and attain the global optimum parameters in the forecasted model. However, the efficiency of SVR might be hindered by noise that typically exists in any hydrological time series data through random influences and inaccuracies in recording. Thus, this condition could compromise the quality of input

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Nguyen, Hung Q., Jim S. Whittington, John C. Devlin, Ha L. Vu, Ngoc-Vinh Vu, and Eddie Custovic. "Accurate Phase Calibration for Digital Beam-Forming in Multi-Transceiver HF Radar System." International Journal of Electronics and Telecommunications 59, no. 3 (2013): 245–54. http://dx.doi.org/10.2478/eletel-2013-0029.

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Abstract The TIGER-3 radar is being developed as an “all digital” radar with 20 integrated digital transceivers, each connected to a separate antenna. Using phased array antenna techniques, radiated power is steered towards a desired direction based on the relative phases within the array elements. This paper proposes an accurate phase measurement method to calibrate the phases of the radio output signals using Field Programmable Gate Array (FPGA) technology. The method sequentially measures the phase offset between the RF signal generated by each transceiver and a reference signal operated at

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