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Journal articles on the topic 'LTE signal compression'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Guo, Bin, Wei Cao, An Tao, and Dragan Samardzija. "LTE/LTE-A signal compression on the CPRI interface." Bell Labs Technical Journal 18, no. 2 (2013): 117–33. http://dx.doi.org/10.1002/bltj.21608.

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Leonardo, Ramalho, Nilma Fonseca Maria, Klautau Aldebaro, et al. "An LPC-Based Fronthaul Compression Scheme." IEEE Communications Letters 21, no. 2 (2016): 318–21. https://doi.org/10.1109/LCOMM.2016.2624296.

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Several new architectures are under investigation for cloud radio access networks, assuming distinct splits of functionality among the network elements. Consequently, the research on radio data compression for the fronthaul is based on assumptions that correspond to a wide variety of tradeoffs among data rate, signal distortion, latency and computational cost. This paper describes a method for LTE downlink point-topoint signal compression based on linear prediction and Huffman coding, which is suitable for low cost encoding and decoding units with s

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Cárdenas-Valdez, José Ricardo, Jose Alejandro Galaviz-Aguilar, Cesar Vargas-Rosales, Everardo Inzunza-González, and Leonardo Flores-Hernández. "A Crest Factor Reduction Technique for LTE Signals with Target Relaxation in Power Amplifier Linearization." Sensors 22, no. 3 (2022): 1176. http://dx.doi.org/10.3390/s22031176.

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The signal conditioning treatment to achieve good relation of power with radio-frequency (RF) conversion in conventional transceiver systems require precise baseband models. A developed framework is built to provide a demonstration of the modeling figures of merit with orthogonal frequency division multiplexing (OFDM) support under signal conditioning and transmission restrictions to waveforms with high peak to average power ratio (PAPR) in practical applications. Therefore, peak and average power levels have to be limited to correct high PAPR for a better suited correction power from the ampl

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Abderraouf, Elarbi, Mohamed Rida Lahcene, Sid Ahmed Zegnoun, Mohammed Sofiane Bendelhoum, Abderrazak Ali Tadjeddine, and Fayssal Menezla. "Transmission performance in compressed medical images using turbo code." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 1 (2022): 318. http://dx.doi.org/10.11591/ijeecs.v27.i1.pp318-327.

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Medical imaging is now an essential support for screening, diagnosis, treatment protocols implementation, patient monitoring, operative preparation and post-operative control. In addition, scientific and technological advances make it possible to set up new imaging methods, often complementary to the existing ones, but also to gradually improve their accuracy. The result is an increase, in the acquisitions number made for the same patient and for information produced for each examination. Since these images must be kept for a certain period, the storage space required for archiving all this da

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Wang, Yuqi, Tongyu Nie, and Xunqian Tong. "Efficient Compressed Sensing-Driven Wireless Multi-Hop Seismic Data Transmission Network." Journal of Computer Science and Artificial Intelligence 2, no. 3 (2025): 58–62. https://doi.org/10.54097/fcan0a87.

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In recent years, the advancement of cableless seismic data acquisition devices, particularly nodal seismographs, has revolutionized seismic exploration. However, traditional "blind acquisition" methods face significant limitations, including the inability to enable real-time monitoring, challenges in ensuring data transmission stability, and the inefficiency of device retrieval in large-scale exploration projects. To address these issues, this paper proposes an Efficient Com-pressed Sensing-Driven Wireless Multi-Hop Seismic Data Transmission Network (WMDTN), which inte-grates a hierarchical wi

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Zhang, Zheng Pu, Xing Feng Guo, and Bo Tian. "Analysis of the Effect of Noise in CosaMP Algorithm." Advanced Materials Research 926-930 (May 2014): 2992–95. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.2992.

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Compressive sensing is a new type of digital signal processing method. The novel objective of compressive Sensing is to reconstruct a signal accurately and efficiently from far fewer sampling points got by Nyquist sampling theorem. Compressive sensing theory combines the process of sampling and compression to reduce the complexity of signal processing, which is widely used in many fields. so there are wide application prospects in the areas of radar image, wireless sensor network (WSN), radio frequency communication, medical image processing, image device collecting and so on. One of the impor

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Saponara, Sergio, Filippo Giannetti, and Bruno Neri. "Design Exploration of mm-Wave Integrated Transceivers for Short-Range Mobile Communications Towards 5G." Journal of Circuits, Systems and Computers 26, no. 04 (2016): 1750069. http://dx.doi.org/10.1142/s0218126617500694.

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This paper presents a design exploration, at both system and circuit levels, of integrated transceivers for the upcoming fifth generation (5G) of wireless communications. First, a system level model for 5G communications is carried out to derive transceiver design specifications. Being 5G still in pre-standardization phase, a few currently used standards (ECMA-387, IEEE 802.15.3c, and LTE-A) are taken into account as the reference for the signal format. Following a top-down flow, this work presents the design in 65[Formula: see text]nm CMOS SOI and bulk technologies of the key blocks of a full

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Golubičić, Zoran, Slobodan Simić, and Aleksa J. Zejak. "Design and EPGA Implementation of Digital Pulse Compression for Band–Pass Radar Signals." Journal of Electrical Engineering 64, no. 3 (2013): 191–95. http://dx.doi.org/10.2478/jee-2013-0028.

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The paper presents fully digitized approach for band-pass discrete coded radar signals. The emphasis is to use one generalized reconfigurable compressor for several different types of signals and different types of receivers. It fits for direct radio frequency receiver (RF) as well as for intermediate frequency (IF) receiver. The system implementation on field programmable gate area (FPGA) let us eliminate special chips previously needed. From the experimental results it is known that this approach appears to work well for matched and mismatched pulse compression and it outstands when timeband

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9

Feng, Chenwei. "Data Compression Scheme of Fronthaul Network Based on LTE." International Journal of Online Engineering (iJOE) 14, no. 10 (2018): 153. http://dx.doi.org/10.3991/ijoe.v14i10.9312.

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<span style="font-family: 'Times New Roman',serif; font-size: 10pt; mso-fareast-font-family: 'MS Mincho'; mso-fareast-language: DE; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">As the long term evolution (LTE) mobile users and transmission data increase, the load of the fronthaul network increases. In order to control the consumption of optical fiber resources, and prevent congestion under the premise of increasing data transmission, it is necessary to compress the data of the fronthaul network. In this paper, a data compression scheme of LTE-based fronthaul network is proposed.

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Li, Dengao, Junmin Zhao, Hongyan Liu, and Defeng Hao. "The Application of FastICA Combined with Related Function in Blind Signal Separation." Mathematical Problems in Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/953745.

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Blind source separation (BSS) has applications in the fields of data compression, feature recognition, speech, audio, and biosignal processing. Identification of ECG signal is one of the challenges in the biosignal processing. Proposed in this paper is a new method, which is the combination of related function relevance to estimated signal and negative entropy in fast independent component analysis (FastICA) as objective function, and the iterative formula is derived without any assumptions; then the independent components are found by maximizing the objective function. The improved algorithm

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Ke, Wei, Xiunan Zhang, Yanan Yuan, and Jianhua Shao. "Compressing Sensing Based Source Localization for Controlled Acoustic Signals Using Distributed Microphone Arrays." Mathematical Problems in Engineering 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/1981280.

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In order to enhance the accuracy of sound source localization in noisy and reverberant environments, this paper proposes an adaptive sound source localization method based on distributed microphone arrays. Since sound sources lie at a few points in the discrete spatial domain, our method can exploit this inherent sparsity to convert the localization problem into a sparse recovery problem based on the compressive sensing (CS) theory. In this method, a two-step discrete cosine transform- (DCT-) based feature extraction approach is utilized to cover both short-time and long-time properties of aco

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Wang, Tianzuo, Chunli Wang, Fei Xue, Linxiang Wang, Beyene Hana Teshome, and Mengya Xue. "Acoustic Emission Characteristics and Energy Evolution of Red Sandstone Samples under Cyclic Loading and Unloading." Shock and Vibration 2021 (February 10, 2021): 1–15. http://dx.doi.org/10.1155/2021/8849137.

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To explore the characteristics of rock deformation and failure under cyclic loading and unloading, the MTS815 rock mechanics test system and acoustic emission (AE) signal acquisition system were used to perform cyclic loading and unloading tests on red sandstone samples. The results showed that, compared with the uniaxial compression test, cyclic loading and unloading had a certain strengthening effect on the strength of the samples. The plastic deformation of the rock samples increased as the number of cycles increased. Based on AE signals, the cracking mode classification was analyzed on the

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Pinal, Choksi. "Elementary Theory of Wavelets and Filter Bank." International Journal of Trend in Scientific Research and Development 2, no. 4 (2018): 571–76. https://doi.org/10.31142/ijtsrd12997.

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Many of us are interested in detecting the irregularity in very small region of a transient signal which cannot be detected by necked eyes. That can be possible by discretizing the region in which the irregularity lie. There are two ways to discretize the signal. In theory one can use Fourier transform on the signal and cut in M pieces. Where as in practice discretization can be obtained by applying multiple number of filters Filter Bank .This paper will give knowledge of wavelets and filter banks and later on connection between them. These are rapidly developing topics in real time. The techn

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Yuan, Guo Shun, and Li Qing Geng. "ECG Signal Denoising Algorithm Based on Optimization Wavelet Transform." Advanced Materials Research 706-708 (June 2013): 785–88. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.785.

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Wavelet transform algorithm with its unique multi-resolution analysis and it is in the time - frequency domain has the advantage of the ability to characterize the local signal characteristics, let it has been widely used in signal detection, noise removal, feature extraction, image compression and so on. In this paper, on the basis of already wavelet transform ECG noise removal, proposed a median filter optimization algorithm, enables ECG noise removal effect is more obvious, also for the Eigen values detection of ECG lay a better foundation.

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15

Barbosa, Maximiliano, Leandro Pralon, Antonio L. L. Ramos, and José Antonio Apolinário. "On a Closer Look of a Doppler Tolerant Noise Radar Waveform in Surveillance Applications." Sensors 24, no. 8 (2024): 2532. http://dx.doi.org/10.3390/s24082532.

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The prevalence of Low Probability of Interception (LPI) and Low Probability of Exploitation (LPE) radars in contemporary Electronic Warfare (EW) presents an ongoing challenge to defense mechanisms, compelling constant advances in protective strategies. Noise radars are examples of LPI and LPE systems that gained substantial prominence in the past decade despite exhibiting a common drawback of limited Doppler tolerance. The Advanced Pulse Compression Noise (APCN) waveform is a stochastic radar signal proposed to amalgamate the LPI and LPE attributes of a random waveform with the Doppler toleran

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Mnevec, Anton, and Natalia Ivanushkina. "NEURAL NETWORK AUTOENCODER MODEL FOR FORMING REDUCED VECTOR CHARACTERISTICS OF ECG SIGNALS." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 69(1) (June 28, 2025): 93–105. https://doi.org/10.20535/1970.69(1).2025.331920.

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The paper considers the actual problem of improving neural network models for the classification of cardiovascular pathologies by compressing the information contained in electrocardiographic (ECG) signals. Due to the active implementation of artificial intelligence in medical diagnostics, the study focuses on creating a reduced ECG feature vector that allows for a significant reduction in training data volume without losing important diagnostic information. The research is dedicated to the development of an autoencoder model with a specialized architecture that combines convolutional and full

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Ge, Dali, Yuntong Dai, and Kai Li. "Self-Sustained Euler Buckling of an Optically Responsive Rod with Different Boundary Constraints." Polymers 15, no. 2 (2023): 316. http://dx.doi.org/10.3390/polym15020316.

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Self-sustained oscillations can directly absorb energy from the constant environment to maintain its periodic motion by self-regulating. As a classical mechanical instability phenomenon, the Euler compression rod can rapidly release elastic strain energy and undergo large displacement during buckling. In addition, its boundary configuration is usually easy to be modulated. In this paper, we develop a self-sustained Euler buckling system based on optically responsive liquid crystal elastomer (LCE) rod with different boundary constraints. The buckling of LCE rod results from the light-induced ex

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18

Al-Mefty, Ossama, Louis H. Harkey, Troy H. Middleton, Robert R. Smith, and John L. Fox. "Myelopathic cervical spondylotic lesions demonstrated by magnetic resonance imaging." Journal of Neurosurgery 68, no. 2 (1988): 217–22. http://dx.doi.org/10.3171/jns.1988.68.2.0217.

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✓ Eighteen cases are presented in which magnetic resonance (MR) imaging demonstrated two types of lesions in patients with cervical spondylotic myelopathy. In the first type, localized spinal cord changes at the level of compression, consistent with myelomalacia, were revealed best with T2-weighted images as high-intensity spinal cord signals. In the second type, lesions consistent with either cystic necrosis or secondary syrinx were noted locally, and/or extending longitudinally up, and/or down inside the spinal cord. These latter lesions were best revealed as low-intensity signals on T1-weig

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Zou, Chi Jia. "Study of Access Algorithms in Wireless Network." Advanced Materials Research 129-131 (August 2010): 1286–90. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.1286.

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The measure to improve the performance of the wireless network channel is of great significance to the building in the wireless network. Due to IPv6 Agreement is the agreement for the next generation network and the core of it, IPHC header compression technology provides IPv6 basic headers and expanding headers with a good support, so we adopt IPHC header compression scheme which groups the data that need to transmitting, introduce retransmission mechanism and header request mechanism to make IPHC have much compression effect on headers. But IPHC header compression scheme is hard on signal cha

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Goehle, Geoff, Benjamin Cowen, Thomas E. Blanford, J. Daniel Park, and Daniel C. Brown. "Approximate extraction of late-time returns via morphological component analysis." Journal of the Acoustical Society of America 153, no. 5 (2023): 2838. http://dx.doi.org/10.1121/10.0019415.

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A fundamental challenge in acoustic data processing is to separate a measured time series into relevant phenomenological components. A given measurement is typically assumed to be an additive mixture of myriad signals plus noise whose separation forms an ill-posed inverse problem. In the setting of sensing elastic objects using active sonar, we wish to separate the early-time return from the object's geometry from late-time returns caused by elastic or compressional wave coupling. Under the framework of morphological component analysis (MCA), we compare two separation models using the short-du

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Ranjan, Rajiv, and Prabhat Kumar. "An Improved Image Compression Algorithm Using 2D DWT and PCA with Canonical Huffman Encoding." Entropy 25, no. 10 (2023): 1382. http://dx.doi.org/10.3390/e25101382.

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Of late, image compression has become crucial due to the rising need for faster encoding and decoding. To achieve this objective, the present study proposes the use of canonical Huffman coding (CHC) as an entropy coder, which entails a lower decoding time compared to binary Huffman codes. For image compression, discrete wavelet transform (DWT) and CHC with principal component analysis (PCA) were combined. The lossy method was introduced by using PCA, followed by DWT and CHC to enhance compression efficiency. By using DWT and CHC instead of PCA alone, the reconstructed images have a better peak

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Barannik, Vladimir, Andrii Krasnorutsky, Vitalii Kolesnyk, Valeriy Barannik, Sergii Pchelnikov, and Pavlo Zeleny. "Method of compression and ensuring the fidelity of video images in infocommunication networks." Radioelectronic and Computer Systems, no. 4 (November 29, 2022): 129–42. http://dx.doi.org/10.32620/reks.2022.4.10.

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Subject research in the article is the methods of compressing video images under conditions of ensuring the desired level of their fidelity in the delivery process using infocommunication networks. The goal is to develop methods of encoding video images for increasing the level of their compression in the conditions of ensuring required reliability. Task: to substantiate the approach regarding the structural clusterization of transformed video segments in the conditions of preserving their reliability; to develop a method of structural and statistical coding of transformants in the spectral-cl

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Voigt, Thomas, Jonas Kley, and Silke Voigt. "Dawn and dusk of Late Cretaceous basin inversion in central Europe." Solid Earth 12, no. 6 (2021): 1443–71. http://dx.doi.org/10.5194/se-12-1443-2021.

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Abstract. Central and western Europe were affected by a compressional tectonic event in the Late Cretaceous, caused by the convergence of Iberia and Europe. Basement uplifts, inverted graben structures, and newly formed marginal troughs are the main expressions of crustal shortening. Although the maximum activity occurred during a short period of time between 90 and 75 Ma, the exact timing of this event is still unclear. Dating of the start and end of Late Cretaceous basin inversion gives very different results depending on the method applied. On the basis of borehole data, facies, and thickne

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Khalifa, A. Salim, Mahdi Sabbar Bayan, and K. Abboud Maryam. "Compressive sensing-based channel estimation for high mobile systems with delay Doppler effects." TELKOMNIKA (Telecommunication, Computing, Electronics and Control) 20, no. 6 (2022): 1206–13. https://doi.org/10.12928/telkomnika.v20i6.24233.

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In this paper, channel overhead is reduced by exploiting channel sparsity for multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system. Where, compressive sensing (CS) based dictionary design algorithms has been adopted as a channel estimation technique in high mobile systems with minimal number of pilots, such as high-speed train (HST) systems. A novel framework design of the dictionary-based CS was proposed considering both delay and Doppler effects in order to correctly recover the channel response. The channel under consideration is a 2 by 2 space-time b

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Zhang, Wanmao, Dunwen Liu, Yu Tang, and Yinghua Jian. "Compression Damage Precursors of Silane-Protected Concrete Under Sulfate Erosion Based on Acoustic Emission Characterization." Fractal and Fractional 9, no. 4 (2025): 254. https://doi.org/10.3390/fractalfract9040254.

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Concrete materials exposed to sulfate-rich geological environments are prone to structural durability degradation due to chemical erosion. Silane-based protective materials can enhance the durability of concrete structures under harsh environmental conditions. This study investigates the evolution of acoustic emission (AE) precursor characteristics in silane-protected, sulfate-eroded concrete specimens during uniaxial compression failure. Unlike existing research focused primarily on protective material properties, this work establishes a novel framework linking “silane treatment–AE parameters

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Stuck, Anna K., Samuel Kunz, Iris Baumgartner, and Nils Kucher. "Patency and Clinical Outcomes of a Dedicated, Self-Expanding, Hybrid Oblique Stent Used in the Treatment of Common Iliac Vein Compression." Journal of Endovascular Therapy 24, no. 1 (2016): 159–66. http://dx.doi.org/10.1177/1526602816676803.

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Purpose: To investigate the clinical outcomes of a dedicated hybrid oblique nitinol stent that has been specifically designed to treat common iliac vein compression. Methods: The Bern Venous Stent Registry database was interrogated to identify all patients who had at least 6-month follow-up after treatment with the sinus-Obliquus hybrid stent for common iliac vein compression. The search identified 24 patients (mean age 39±18 years; 20 women) who matched the search criteria. Ten patients had postthrombotic syndrome (PTS), another 10 patients had acute iliofemoral thrombosis after catheter-dire

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Wang, Fujiang, Liyun Fan, Yihu Chen, Zhaohua Wan, and Fabiao Liu. "Acoustic Emission Test of Marble Powder Concrete." Sustainability 14, no. 24 (2022): 16976. http://dx.doi.org/10.3390/su142416976.

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Uniaxial compression tests were carried out based on acoustic emission technology to study the rule and process of the damage evolution of marble powder concrete (MPC) under compression. The fracture characteristics of MPC are examined by analyzing the variation characteristics of acoustic emission signal parameters. The damage evolution model of MPC is established based on the characteristic parameters. The results showed that the strength loss rate of MPC decreased with the curing time, and the maximum strength loss rate of 28 d was 6.2% when the substitution percentage was 15%. According to

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Löpez, Benjamín C., Károly M. Dívid, and H. Alan Crockard. "Inadequate PAX-1 gene expression as a cause of agenesis of the thoracolumbar spine with failure of segmentation." Journal of Neurosurgery 86, no. 6 (1997): 1018–21. http://dx.doi.org/10.3171/jns.1997.86.6.1018.

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✓ U An unusual case with absence and “fusion” of several thoracic and lumbar vertebral bodies leading to a severe thoracolumbar kyphos is presented. Late-onset neurological deterioration occurred due to spinal cord compression, which was treated with anterior decompression. Although several mechanisms for the development of these extensive and rare abnormalities have been proposed, the cause in humans remains unknown. An embryological basis is presented in the light of recent advances in molecular genetics, which show that abnormal notochordal signals and Pax-1 gene expression can produce an e

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Goehle, Geoff, Benjamin Cowen, Thomas E. Blanford, J. Daniel Park, and Daniel C. Brown. "Approximate extraction of late-time returns via morphological component analysis." Journal of the Acoustical Society of America 153, no. 3_supplement (2023): A54. http://dx.doi.org/10.1121/10.0018139.

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A fundamental challenge in acoustic data processing is to separate a measured time series into relevant phenomenological components. In the setting of sensing elastic objects using active sonar, we wish to separate the early-time returns (e.g., returns from the object's exterior geometry) from late-time returns caused by elastic or compressional wave coupling. Under the framework of morphological component analysis (MCA), we compare two separation models using the short-duration and long-duration responses as a proxy for early-time and late-time returns. Results are computed for broadside geom

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He, Defu, and Si Xiong. "Image Processing Design and Algorithm Research Based on Cloud Computing." Journal of Sensors 2021 (October 5, 2021): 1–10. http://dx.doi.org/10.1155/2021/9198884.

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Image processing technology is a popular practical technology in the computer field and has important research value for signal information processing. This article is aimed at studying the design and algorithm of image processing under cloud computing technology. This paper proposes cloud computing technology and image processing algorithms for image data processing. Among them, the material structure and performance of the system can choose a verification algorithm to achieve the final operation. Moreover, let us start with the image editing features. This article isolates software and hardw

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He, Defu, and Si Xiong. "Image Processing Design and Algorithm Research Based on Cloud Computing." Journal of Sensors 2021 (October 5, 2021): 1–10. http://dx.doi.org/10.1155/2021/9198884.

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Image processing technology is a popular practical technology in the computer field and has important research value for signal information processing. This article is aimed at studying the design and algorithm of image processing under cloud computing technology. This paper proposes cloud computing technology and image processing algorithms for image data processing. Among them, the material structure and performance of the system can choose a verification algorithm to achieve the final operation. Moreover, let us start with the image editing features. This article isolates software and hardw

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Strogen, Dominic P., Karen E. Higgs, Angela G. Griffin, and Hugh E. G. Morgans. "Late Eocene – Early Miocene facies and stratigraphic development, Taranaki Basin, New Zealand: the transition to plate boundary tectonics during regional transgression." Geological Magazine 156, no. 10 (2019): 1751–70. http://dx.doi.org/10.1017/s0016756818000997.

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AbstractEight latest Eocene to earliest Miocene stratigraphic surfaces have been identified in petroleum well data from the Taranaki Basin, New Zealand. These surfaces define seven regional sedimentary packages, of variable thickness and lithofacies, forming a mixed siliciclastic–carbonate system. The evolving tectonic setting, particularly the initial development of the Australian–Pacific convergent margin, controlled geographic, stratigraphic and facies variability. This tectonic signal overprinted a regional transgressive trend that culminated in latest Oligocene times. The earliest influen

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Guo, Jiaqi, Pengfei Liu, Junqi Fan, and Hengyuan Zhang. "Study on the Mechanical Behavior and Acoustic Emission Properties of Granite under Triaxial Compression." Geofluids 2021 (September 21, 2021): 1–17. http://dx.doi.org/10.1155/2021/3954097.

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To study the rock mechanical behaviors and damage process mechanism of granite samples under triaxial stress, conventional triaxial compression tests were carried out on an RMT-150B rock mechanics testing machine and acoustic emission detector. The test results show that the strength of the granite sample has a good linear relationship with the confining pressure, the cohesion force c of the granite samples is 29.37 MPa, and the internal friction angle is 54.23° by calculation based on the Mohr-Coulomb strength criterion. The larger the initial confining pressure of the rock sample is, the lar

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Mahomed, Irshaad, and Beric W. Skews. "Expansion wave diffraction over a 90 degree corner." Journal of Fluid Mechanics 757 (September 25, 2014): 649–64. http://dx.doi.org/10.1017/jfm.2014.491.

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AbstractThe diffraction of an initially one-dimensional plane expansion wave over a 90° corner was explored using experiment and numerical simulation. Unlike studies of shock diffraction, expansion wave diffraction has hardly been documented previously. The planar expansion wave was produced in a shock tube by bursting a diaphragm. Two independent parameters were identified for study: (i) the initial diaphragm shock tube pressure ratio, which determines the strength (pressure ratio) of the expansion, and (ii) the position of the diaphragm from the apex of the 90° corner, which determines the w

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Jurdana, Vedran. "Interpretable Evaluation of Sparse Time–Frequency Distributions: 2D Metric Based on Instantaneous Frequency and Group Delay Analysis." Mathematics 13, no. 6 (2025): 898. https://doi.org/10.3390/math13060898.

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Compressive sensing in the ambiguity domain offers an efficient method for reconstructing high-quality time–frequency distributions (TFDs) across diverse signals. However, evaluating the quality of these reconstructions presents a significant challenge due to the potential loss of auto-terms when a regularization parameter is inappropriate. Traditional global metrics have inherent limitations, while the state-of-the-art local Rényi entropy (LRE) metric provides a single-value assessment but lacks interpretability and positional information of auto-terms. This paper introduces a novel performan

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Zhu, Dan Dan, Xiu Ping Zhang, You Liang Zhang, and Jun Bo Dai. "A New Image Watermarking Algorithm Using NSCT and Harris Detector in Green Manufacturing." Applied Mechanics and Materials 340 (July 2013): 277–82. http://dx.doi.org/10.4028/www.scientific.net/amm.340.277.

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Based on multistage theory and NSCT, a new feature-based image watermarking scheme is proposed in this paper. Firstly, the multistage Harris detector is utilized to extract steady feature points from the host image; then, the local feature regions (LFR) are ascertained adaptively according to the feature scale theory, and they are scaled to a standard size; finally, the digital watermark are embedded into no subsample contour let low frequency area, in the low frequency regions made pseudo-Zernike moment calculation. Experimental results show that the proposed scheme is not only invisible and

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Lee, Kwang-Sig, Hyun-Joon Park, Ji Eon Kim, et al. "Compressed Deep Learning to Classify Arrhythmia in an Embedded Wearable Device." Sensors 22, no. 5 (2022): 1776. http://dx.doi.org/10.3390/s22051776.

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The importance of an embedded wearable device with automatic detection and alarming cannot be overstated, given that 15–30% of patients with atrial fibrillation are reported to be asymptomatic. These asymptomatic patients do not seek medical care, hence traditional diagnostic tools including Holter are not effective for the further prevention of associated stroke or heart failure. This is likely to be more so in the era of COVID-19, in which patients become more reluctant on hospitalization and checkups. However, little literature is available on this important topic. For this reason, this stu

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Bruneau, Michaël, Eric Sauvageau, Peter Nakaji, et al. "Preliminary Personal Experiences With the Application of Near-Infrared Indocyanine Green Videoangiography in Extracranial Vertebral Artery Surgery." Neurosurgery 66, no. 2 (2010): 305–11. http://dx.doi.org/10.1227/01.neu.0000363596.52283.65.

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Abstract INTRODUCTION We evaluated the feasibility, usefulness, and limitations of near-infrared indocyanine green (ICG) videoangiography during procedures involving the extracranial vertebral artery (VA). METHODS Nine patients (2 women, 7 men; mean age, 55 years) were evaluated at 2 neurosurgical centers. Near-infrared ICG videoangiography was applied during transposition and rerouting of the first segment of VA (V1; n = 6) and during resection of neurinomas near the second (V2; n = 1) and third (V3; n = 2) segments of VA. RESULTS Early after ICG injection, V1 fluoresced homogenously. The flu

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Hainaut, Donatien, and Michel Denuit. "WAVELET-BASED FEATURE EXTRACTION FOR MORTALITY PROJECTION." ASTIN Bulletin 50, no. 3 (2020): 675–707. http://dx.doi.org/10.1017/asb.2020.18.

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AbstractWavelet theory is known to be a powerful tool for compressing and processing time series or images. It consists in projecting a signal on an orthonormal basis of functions that are chosen in order to provide a sparse representation of the data. The first part of this article focuses on smoothing mortality curves by wavelets shrinkage. A chi-square test and a penalized likelihood approach are applied to determine the optimal degree of smoothing. The second part of this article is devoted to mortality forecasting. Wavelet coefficients exhibit clear trends for the Belgian population from

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Al-Sudani, Faten Ahmed Jebur. "Video Compression using Neural Weight Step and Huffman Coding Techniques." JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences 31, no. 2 (2023): 64–81. http://dx.doi.org/10.29196/jubpas.v31i2.4656.

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Background: This paper proposes a Hierarchical Video Compression Scheme (HVCS) method with three hierarchical layers of quality with Recurrent Quality Enhancement (RQEN‎‎) network. Image compression techniques are used to compress frames in the first layer, where frames have the highest quality. Using high-quality frame as a reference, the Bi-Directional Deep Compression (BDC) network is proposed for frame compression in the second layer with considerable quality. In the third layer, low quality is used for frame compression using adopted Single Motion Compression (SMC) network, which pr

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Smith, Vivianne C., Joel Pokorny, Barry B. Lee, and Dennis M. Dacey. "Primate Horizontal Cell Dynamics: An Analysis of Sensitivity Regulation in the Outer Retina." Journal of Neurophysiology 85, no. 2 (2001): 545–58. http://dx.doi.org/10.1152/jn.2001.85.2.545.

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The human cone visual system maintains sensitivity over a broad range of illumination, from below 1 troland to 1,000,000 trolands. While the cone photoreceptors themselves are an important locus for sensitivity regulation—or light adaptation—the degree to which they contribute in primates remains unclear. To determine the range of sensitivity regulation in the outer retina, the temporal dynamics, neural gain control, and response range compression were measured in second-order neurons, the H1 horizontal cells, of the macaque retina. Situated at the first synapse in the retina, H1 cells receive

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Zhang, Wenlong, Jiajia Yu, Xiufeng Xu, Jianju Ren, Kaide Liu, and Huifang Shi. "Waveform Complexity and Positioning Analysis of Acoustic Emission Events during the Compression Failure Process of a Rock Burst Prone Sample." Buildings 14, no. 5 (2024): 1331. http://dx.doi.org/10.3390/buildings14051331.

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The localization results of acoustic emission (AE) events can reflect the location and pattern of burst-prone rock failures. However, event localization heavily depends on the quality of the original waveform of the sensor. Therefore, this study analyzed the AE waveform of a rock sample under compression to evaluate its failure localization and quality. From the research results, it could be seen that the initial failure was relatively calm, with clear take-off points, which can be better used for accurate AE event positioning. However, the later failure was severe, causing the take-off points

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Brătilă, E., C. Cârstoiu, and D. E. Comandaşu. "Multidisciplinary Treatment of Voluminous Pelvic Tumor With Gluteal Development - Case Presentation." Romanian Journal of Orthopaedic Surgery and Traumatology 1, Supplement (2018): 6. http://dx.doi.org/10.2478/rojost-2018-0017.

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Abstract The aim of the paper was to present the case of a 64-year-old patient with no significant pathological history, accusing the significant increase in volume of her left buttock, accompanied by sciatic compression and pelvic pain phenomena. Clinical evaluation revealed a large, left gluteal tumor, of regular shape and medium consistency, painless at palpation, causing hyperesthesia in the sciatic territory by compression. The IRM with contrast enhancement described a heterogeneous tumor, measuring about 25 centimeters in diameter, isointense in the T1 and T2 signals, with hypointense ar

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Penny, Daniel J., Jonathan P. Mynard, and Joseph J. Smolich. "Aortic wave intensity analysis of ventricular-vascular interaction during incremental dobutamine infusion in adult sheep." American Journal of Physiology-Heart and Circulatory Physiology 294, no. 1 (2008): H481—H489. http://dx.doi.org/10.1152/ajpheart.00962.2006.

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This study undertook a detailed examination of the ventricular-vascular interaction of the predominant β-adrenergic agonist dobutamine using wave intensity analysis. Eight anesthetized open-chest ewes were instrumented with an aortic micromanometer to measure central aortic blood pressure (P) and an ultrasonic flow probe to obtain ascending aortic blood velocity ( U). Hemodynamics were recorded during incremental dobutamine infusion (0.5, 1, 2.5, 5, 7.5, and 10 μg·kg−1·min−1). Wave intensity (d IW) was calculated as the product of the rates of change of P and U with customized software using e

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Merola, Simona, Luca Marchitto, Cinzia Tornatore, and Gerardo Valentino. "Chemiluminescence analysis of the effect of butanol-diesel fuel blends on the spray-combustion process in an experimental common rail diesel engine." Thermal Science 19, no. 6 (2015): 1943–57. http://dx.doi.org/10.2298/tsci140329086m.

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Combustion process was studied from the injection until the late combustion phase in an high swirl optically accessible combustion bowl connected to a single cylinder 2-stroke high pressure common rail compression ignition engine. Commercial diesel and blends of diesel and n-butanol (20%: BU20 and 40%: BU40) were used for the experiments. A pilot plus main injection strategy was investigated fixing the injection pressure and fuel mass injected per stroke. Two main injection timings and different pilot-main dwell times were explored achieving for any strategy a mixing controlled combustion. Adv

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Peng, Xi, Yuanyuan Zhou, Li Wang, and Zhaoqian Liu. "Folding of Oceanic Crust Along the Davie Fracture Zone, Offshore Tanzania." Journal of Marine Science and Engineering 13, no. 6 (2025): 1179. https://doi.org/10.3390/jmse13061179.

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The Davie Fracture Zone (Davie FZ)—among the longest offshore transform systems in East Africa—mediated Madagascar’s southward displacement following Gondwana’s Early Jurassic breakup. This giant structure has a distinct topography and gravity field signals. However, it is buried by thick sediments in its northern segment offshore Tanzania, hindering understanding of the internal structures and their origin. In this study, we applied 2-D multichannel seismic to analyze the structural characteristics and evolution of the Davie FZ. The Davie FZ is located in the oceanic domain, which is bordered

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Fehlings, Michael G., and Babak Arvin. "Surgical management of cervical degenerative disease: the evidence related to indications, impact, and outcome." Journal of Neurosurgery: Spine 11, no. 2 (2009): 97–100. http://dx.doi.org/10.3171/2009.5.spine09210.

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In this special edition of Journal of Neurosurgery: Spine, a series of systematic reviews sponsored by the Section on Disorders of the Spine and Peripheral Nerves of the American Association of Neurological Surgeons/Congress of Neurological Surgeons is presented. This collection of comprehensive reviews summarizes the medical evidence related to the surgical management of cervical degenerative disc disease. Several of the key conclusions are discussed in this introduction to the issue: There is Class II evidence to suggest that the clinical condition remains stable when observed over a 3-year

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Wu, Riheng, Yangyang Dong, Zhenhai Zhang, and Le Xu. "Two 2-D DOA Estimation Methods with Full and Partial Generalized Virtual Aperture Extension Technology." International Journal of Antennas and Propagation 2019 (December 24, 2019): 1–11. http://dx.doi.org/10.1155/2019/3924569.

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We address the two-dimensional direction-of-arrival (2-D DOA) estimation problem for L-shaped uniform linear array (ULA) using two kinds of approaches represented by the subspace-like method and the sparse reconstruction method. Particular interest emphasizes on exploiting the generalized conjugate symmetry property of L-shaped ULA to maximize the virtual array aperture for two kinds of approaches. The subspace-like method develops the rotational invariance property of the full virtual received data model by introducing two azimuths and two elevation selection matrices. As a consequence, the p

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Houten, John K., and Paul R. Cooper. "Laminectomy and Posterior Cervical Plating for Multilevel Cervical Spondylotic Myelopathy and Ossification of the Posterior Longitudinal Ligament: Effects on Cervical Alignment, Spinal Cord Compression, and Neurological Outcome." Neurosurgery 52, no. 5 (2003): 1081–88. http://dx.doi.org/10.1093/neurosurgery/52.5.1081.

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Abstract OBJECTIVE Multilevel anterior decompressive procedures for cervical spondylotic myelopathy or ossification of the posterior longitudinal ligament may be associated with a high incidence of neurological morbidity, construct failure, and pseudoarthrosis. We theorized that laminectomy and stabilization of the cervical spine with lateral mass plates would obviate the disadvantages of anterior decompression, prevent the development of kyphotic deformity frequently seen after uninstrumented laminectomy, decompress the spinal cord, and produce neurological results equal or superior to those

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Liu, Jingyu, Qiong Wang, Dunbo Zhang, and Li Shen. "Super-Resolution Model Quantized in Multi-Precision." Electronics 10, no. 17 (2021): 2176. http://dx.doi.org/10.3390/electronics10172176.

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Deep learning has achieved outstanding results in various tasks in machine learning under the background of rapid increase in equipment’s computing capacity. However, while achieving higher performance and effects, model size is larger, training and inference time longer, the memory and storage occupancy increasing, the computing efficiency shrinking, and the energy consumption augmenting. Consequently, it’s difficult to let these models run on edge devices such as micro and mobile devices. Model compression technology is gradually emerging and researched, for instance, model quantization. Qua

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