Academic literature on the topic 'Multi-Dimensional modulations'

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Journal articles on the topic "Multi-Dimensional modulations"

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Mjølhus, E., and T. Hada. "Oblique stability of circularly polarized MHD waves." Journal of Plasma Physics 43, no. 2 (1990): 257–68. http://dx.doi.org/10.1017/s002237780001477x.

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The stability of finite-amplitude weakly dispersive circularly polarized MHD wave trains with respect to oblique modulations is investigated. The mathematical model is a multi-dimensional extension of the DNLS equation. We have found that the right-hand-polarized wave, which is stable with respect to parallel modulations, is unstable with respect to certain oblique modulations for most primary wavenumbers.
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Lidin, Sven, Partha Jana, Carola Müller, Shuying Piao, and Simeon Ponou. "News from the world of modulated intermetallics." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C167. http://dx.doi.org/10.1107/s2053273314098325.

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The number of modulated structures with more than one modulation vector is small, and such structures often pose special problems in solving and refining. This talk will be concentrated on three such cases; The 3+4 dimensionally modulated cubic structure of digenite, the 3+2 dimensionally modulated structure of Cu3In2, the 3+2 dimensionally modulated structure of AuZn3 and the 3+2 dimensionally modulated structure of Se(Sn4)2K10. The three former cases are interesting because they are relatively weakly ordered structures where modelling is straight-forward, but the model itself is less than ob
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Li, Zhongzhi, Rong Fan, Jinyi Ma, Jianliang Ai, and Yiqun Dong. "Dynamic Temporal Denoise Neural Network with Multi-Head Attention for Fault Diagnosis Under Noise Background." Sensors 24, no. 21 (2024): 6813. http://dx.doi.org/10.3390/s24216813.

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Fault diagnosis plays a crucial role in maintaining the operational safety of mechanical systems. As intelligent data-driven approaches evolve, deep learning (DL) has emerged as a pivotal technique in fault diagnosis research. However, the collected vibrational signals from mechanical systems are usually corrupted by unrelated noises due to complicated transfer path modulations and component coupling. To solve the above problems, this paper proposed the dynamic temporal denoise neural network with multi-head attention (DTDNet). Firstly, this model transforms one-dimensional signals into two-di
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M. Navazi, Hassan, and Md Jahangir Hossain. "Novel Method for Multi-Dimensional Mapping of Higher Order Modulations for BICM-ID Over Rayleigh Fading Channels." IEEE Transactions on Wireless Communications 18, no. 2 (2019): 1142–54. http://dx.doi.org/10.1109/twc.2018.2890061.

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Lu, Yi, Biao Tang, Guisong Yang, Yuanyuan Guo, Linwei Liu, and Alex Henzen. "Progress in Advanced Properties of Electrowetting Displays." Micromachines 12, no. 2 (2021): 206. http://dx.doi.org/10.3390/mi12020206.

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Electrowetting display (EWD) has promising prospects in the electronic paper industry due to it having superior characteristics, such as the ability to provide a comfortable reading experience and quick response. However, in real applications, there are also problems related to dielectric deterioration, excess power consumption, optical instability and narrow color gamut etc. This paper reviewed the existing challenges and recent progress made in terms of improving the optical performance and reliability of EWD. First, the principle of electrowetting applied in small and confined configuration
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Schoenberg, Poppy L. A., та Anne E. M. Speckens. "Multi-dimensional modulations of α and γ cortical dynamics following mindfulness-based cognitive therapy in Major Depressive Disorder". Cognitive Neurodynamics 9, № 1 (2014): 13–29. http://dx.doi.org/10.1007/s11571-014-9308-y.

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Pier, Benoît, and Peter J. Schmid. "Linear and nonlinear dynamics of pulsatile channel flow." Journal of Fluid Mechanics 815 (February 21, 2017): 435–80. http://dx.doi.org/10.1017/jfm.2017.58.

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The dynamics of small-amplitude perturbations, as well as the regime of fully developed nonlinear propagating waves, is investigated for pulsatile channel flows. The time-periodic base flows are known analytically and completely determined by the Reynolds number $Re$ (based on the mean flow rate), the Womersley number $Wo$ (a dimensionless expression of the frequency) and the flow-rate waveform. This paper considers pulsatile flows with a single oscillating component and hence only three non-dimensional control parameters are present. Linear stability characteristics are obtained both by Floqu
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Cao, Jiuxiao, Rui Zhu, Zhen Wang, Jun Wang, Guohao Shi, and Peng Chu. "Recognition of common shortwave protocols and their subcarrier modulations based on multi-scale convolutional GRU." PLOS One 20, no. 6 (2025): e0326536. https://doi.org/10.1371/journal.pone.0326536.

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Shortwave communication plays a vital role in disaster relief and remote communications due to its long-range capabilities and resilience to interference. However, challenges such as multipath propagation, frequency-selective fading, and low signal-to-noise ratios (SNR) significantly hinder automatic protocol and modulation recognition. Traditional signal processing approaches often fail under such conditions, whereas deep learning offers new possibilities for robust signal classification. This study proposes a Multi-Scale Convolutional GRU (MSC-GRU) model for the automatic recognition of thre
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Leyser, Thomas B. "Deterministic chaos in modulated multi-cell drifts of localized lower-hybrid oscillations excited by high-frequency waves in the ionosphere." Annales Geophysicae 43, no. 1 (2025): 319–29. https://doi.org/10.5194/angeo-43-319-2025.

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Abstract. The prominent broad upshifted maximum (BUM) feature in electromagnetic emissions stimulated by powerful high-frequency radio waves in the ionosphere exhibits an exponential spectrum for pump frequencies near a harmonic of the ionospheric electron gyro frequency. Exponential power spectra are a characteristic of deterministic chaos. In the present treatment, a two-fluid model is derived for lower-hybrid (LH) oscillations driven by parametric interaction of the electromagnetic pump field, the electron Bernstein mode, and the upper-hybrid mode, as previously proposed to interpret the BU
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Chen Yanjie, 陈彦杰, 徐正琨 Xu Zhengkun, 赵睿哲 Zhao Ruizhe, 李晓炜 Li Xiaowei, 王涌天 Wang Yongtian та 黄玲玲 Huang Lingling. "多维度大容量超表面全息及光场变换". Acta Optica Sinica 44, № 2 (2024): 0200005. http://dx.doi.org/10.3788/aos231100.

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Dissertations / Theses on the topic "Multi-Dimensional modulations"

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Liu, Jingtian. "Shaping Strategies to Embrace Nonlinear Effects in Optical Fiber Communications." Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAT007.

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Le principal obstacle aux communications longue distance est l'interférence non linéaire (NLI), résultant des effets non linéaires dans les canaux de fibres optiques. Bien que les algorithmes de traitement du signal numérique offrent une atténuation partielle, la nature intrinsèquement non linéaire, couplée aux effets de dispersion prédominants, continue de défier la fidélité de transmission. Aborder la non-linéarité directement à la source par des modulations intrinsèquement moins sensibles aux distortions non-linéaires est au coeur de notre stratégie de recherche. Les schémas traditionnels d
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LEVCOVITZ, RUBEN. "SIMULATION TRELLIS CODES WITH MULTI-DIMENSIONAL MODULATION FOR THE TELEPHONE CHANNEL." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1989. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9264@1.

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EMPRESA BRASILEIRA DE TELECOMUNICAÇÕES<br>O presente trabalho analisa, através de simulação, o desempenho de códigos em treliça em canais telefônicos. Os esquemas simulados correspondem a modulação com constelação multi-dimensionais codificadas, otimizadas de forma integrada utilizando a regra de mapeamento por particionamento de conjuntos. Uma técnica iterativa, eficiente, para obtenção de estrutura do codificador/modulador proposta por Wei [13], é examinada. O desempenho de um código com constelação bidimensional recomendado pelo CCITT é comparado com o desempenho de um código quad
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Kassouf, Marthe. "Capacity and information rates for multiple antenna wireless systems with multi-dimensional modulation." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97781.

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Multiple-Input Multiple-Output (MIMO) systems have shown a great potential for increasing the data transmission rates in wireless communications. These systems are characterized by a high design flexibility which allows a wide variety of efficient signaling techniques and resource allocation methods. In this thesis, we consider the capacity and transmission rates for MIMO systems using various multi-dimensional space-time modulation formats. The latters refer to various allocations of orthogonal signal dimensions (or modulating waveforms) to transmit antennas. For a single-user system with a f
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Prueter, Phillip Edward. "A Study of the Mechanical Design and Gear Tooth Root Strains in Flexible Pin, Multi-Stage, Planetary Wind Turbine Gear Trains Using Three Dimensional Finite Element/Contact Mechanics Models and Experiments." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313372765.

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Joshi, Rimesh M. "Analog and Digital Array Processor Realization of a 2D IIR Beam Filter for Wireless Applications." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1326776749.

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Tang, Chi-Him, and 鄧智謙. "Permanent Magnet Synchronous Motor Control using Multi-Dimensional Feedback Quantization Modulation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/19926510436629867429.

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碩士<br>國立交通大學<br>電控工程研究所<br>98<br>This thesis proposes a novel control method for three phase permanent magnet synchronous motor using multi-dimensional feedback quantization modulation (MDFQM). Unlike the conventional space vector pulse width modulation (SVPWM) which achieves three phase input voltage by a combination of the basic space vectors, the proposed scheme computes optimal switching commands to minimize the filtered measure of quantization error under the constrained switching vector space. Further, the filtered quantization error feedback produces the effect of noise shaping. The com
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Chen, Wei-Yu, and 陳威諭. "Application of multi-dimensional feedback quantized modulation to three-phase current control." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/87398179873538689910.

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碩士<br>國立交通大學<br>電控工程研究所<br>99<br>This paper has implemented three-phase current control in a FPGA-based system. First, we dicuss the mathematical derivation and concept of operation. Then we uses conclusion of the mathematical derivation to design the current control of PMSM. The controller adjusts the output current of inverter to achieve the current command in order to make a comparison of three different current control method. The core of three-phase current control is based on the concept of multi-dimensional feedback quantized modulator (MDFQM). The major part of this paper is MDFQCC and
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Vlok, Jacobus David. "Sparse graph codes on a multi-dimensional WCDMA platform." Diss., 2007. http://upetd.up.ac.za/thesis/available/etd-07042007-155428.

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Yao, Cheng-Chiang, and 姚政江. "Application of Multi-Dimensional Feedback Quantized Modulation to Current Control of Six-Switch-Inverter Fed Two Cascaded Electrodynamic Shakers." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/72626584225497380142.

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碩士<br>國立交通大學<br>電控工程研究所<br>102<br>In this thesis, two cascaded electrodynamic shakers are fed to a six-switch-inverter. To enlarge the region of the output voltages, the high-efficiency multi-dimensional feedback quantized modulation is used. The results of the conventional pulse-width modulation (PWM) are also provided for comparison. All the controls are implemented in FPGA to verify the proposed method. Finally, we verify the difference between PI-PWM and PI-MDFQM by simulation and experiment.
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Jarvis, Thomas William. "Novel tools for ultrafast spectroscopy." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-12-4456.

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Exciton dynamics in semiconductor nanostructures are dominated by the effects of many-body physics. The application of coherent spectroscopic tools, such as two-dimensional Fourier transform spectroscopy (2dFTS), to the study of these systems can reveal signatures of these effects, and in combination with sophisticated theoretical modeling, can lead to more complete understanding of the behaviour of these systems. 2dFTS has previously been applied to the study of GaAs quantum well samples. In this thesis, we outline a precis of the technique before describing our own experiments using 2dFTS
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Books on the topic "Multi-Dimensional modulations"

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Shu, Lin. Multi-dimensional modulation codes for fading channel. National Aeronautics and Space Administration, 1991.

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Shu, Lin. Multi-dimensional modulation codes for fading channel. National Aeronautics and Space Administration, 1991.

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National Aeronautics and Space Administration (NASA) Staff. Multi-Dimensional Modulation Codes for Fading Channel. Independently Published, 2018.

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Book chapters on the topic "Multi-Dimensional modulations"

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Che, Di, An Li, Xi Chen, Qian Hu, and William Shieh. "Multi-dimensional Polarization Modulation." In Datacenter Connectivity Technologies. River Publishers, 2022. http://dx.doi.org/10.1201/9781003337829-14.

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Gao, Jingpeng, Yi Lu, Lu Gao, and Liangxi Shen. "Multi-dimensional Feature Fusion Modulation Classification System Based on Self-training Network." In Lecture Notes in Computer Science. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-34110-7_52.

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Shafi, Sameen, Hafizur Rahman Khan, and Preeti Bajpai. "Epigenetic Regulation of Microglia: Plausible Mechanism and Interventional Approaches in Neurodegeneration." In Advances in Diagnostics and Immunotherapeutics for Neurodegenerative Diseases. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815238754124010010.

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Microglia, the brain resident macrophages perform a wide range of functions ranging from brain development, equilibrium, maintenance in the brain microenvironment, injury repair and the preservation of neuronal networks. Cellular elasticity is a prerequisite for the multi-dimensional tasks performed by microglia. Epigenetic modulations are critically involved in altering gene expression finely coordinating with the phenotypic plasticity in microglia. Any change in its tuning favors the inflammatory state of the brain, which leads to detrimental effects on the nervous system. The present review offers an insightful exploration into the origin of microglia, shedding light on its vital functions and the intricate mechanisms that govern the epigenetic modification of microglia in neurodegenerative disorders. Furthermore, it explores potential avenues for mitigating these diseases.
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Aitsab, O., R. Pyndiah, and B. Solaiman. "Joint optimization of multi-dimensional SOFM codebooks with QAM modulations for vector quantized image transmission." In Proceedings IWISP '96. Elsevier, 1996. http://dx.doi.org/10.1016/b978-044482587-2/50003-3.

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Li, Zhipei, Dong Guo, and Ran Gao. "Coded Modulation and Impairment Compensation Techniques in Optical Fiber Communication." In Fiber Optics [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98811.

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This chapter deals with coded modulation and impairment compensation techniques in optical fiber communication. Probabilistic shaping is a new coded modulation technology, which can reduce transmission power by precoding, reduce bit error rate and improve communication rate. We proposed a probabilistic shaping 16QAM modulation scheme based on trellis coded modulation. Experimental results show that this scheme can achieve better optical SNR gain and BER performance. On the other hand, in order to meet the demand of transmission rate of next generation high speed optical communication systems, multi-dimensional modulation and coherent detection are sufficiently applied. The imperfect characteristics of optoelectronic devices and fiber link bring serious impairments to the high baud-rate and high order modulation format signal, causes of performance impairment are analyzed, pre-compensation and receiver side’s DSP techniques designed for coherent systems are introduced.
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Lee, Hyunglae. "Task-dependent modulation of multi-dimensional human ankle stiffness." In Powered Prostheses. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-817450-0.00003-1.

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Feng, Lixiao, Junjie Bai, Chengyuan Chen, Jun Peng, and Guorong Chen. "Implanted Cardiac Pacemaker Mathematical Modeling and Research Based on the Volume Conduction." In Biotechnology. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8903-7.ch036.

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The research of the communication between implanted Cardiac Pacemaker and external devices is a focus. In this paper, a data communications model based Volume Conduction is creatively presented, in this way the human body conductive ability will been utilized to transmit current, which is more effective and decrease for harm of the human body than the other ways, such as: RF, Optical Transcutaneous, etc. As the frequency increases the KHz level, the effect of background biological noise is considered negligible, the channel is thus modeled as AWGN channel in these frequencies. From Shannon information theory, in two-dimensional modulation, the volume conduction channel capacity formula was derived, further derivation: with extremely low SNR using in the two-level modulation can be very effective use of channel capacity, with high SNR a multi-level modulation is used in order to make full use of the channel capacity. Matlab software is used to the channel simulation, the input and output signal waveforms and eye diagram comparison, the curves of the BER and SNR.
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Ghodrati, Maryam, Ali Mir, and Jingda Wen. "Metamaterials and Metasurfaces for Sensor and Biosensor Applications." In Electromagnetic Wave Control Techniques of Metasurfaces and Metamaterials. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-2599-5.ch003.

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Metamaterials are efficiently homogenizable arrangements of artificial structural components engineered to achieve beneficial and exotic electromagnetic (EM) properties not found in natural materials. Metasurfaces are the two-dimensional analogue of metamaterials consisting of single-layer or multi-layer stacks of planar structures. Both metamaterials and metasurfaces have great potential to be used in a wide range of applications, e.g., antennas, absorbers, slow light devices, photocatalysis, optical modulation devices, and ultra-sensitive sensors and biosensors. This chapter highlights the recent advances in sensing and biosensing technology based on metamaterials and metasurfaces as well as its main applications, focusing on the effect of material selection on device performance. This chapter offers a detailed and comprehensive analysis of optical sensors and biosensors based on metamaterials and metasurfaces for medical diagnoses, biomolecule detection like viruses, and bacteria, and disease diagnosis such as cancer.
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Wang, Y., Z. Feng, KL Cheng, et al. "Role of differentially expressed LBX1 in Adolescent Idiopathic Scoliosis (AIS) paraspinal muscle phenotypes and muscle-bone crosstalk through modulating myoblasts." In Studies in Health Technology and Informatics. IOS Press, 2021. http://dx.doi.org/10.3233/shti210425.

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AIS is three-dimensional spinal deformity with unclear etiopathogenesis. LBX1 is so far the only multi-centers validated AIS predisposing gene. The imbalance of posterior paraspinal muscles is an important factor in AIS etiopathogenesis. It is poorly understood how LBX1 contributes to the abnormal paraspinal muscles and onset/progression of AIS. We aimed to evaluate the expression of LBX1 in paraspinal muscles at the concave and convex side in AIS, and whether alternation of LBX1 expression could affect myoblastsactivities and potentially influence muscle-bone interaction via myokines expression. Paraspinal muscles from AIS and age- and curvature-matched congenital scoliosis (CS) patients were collected for fiber types analysis. Biopsies were also subjected to qPCR to validate expression of myogenic markers, selected myokines and LBX1. Human skeletal muscle myoblast (HSMM) was used for LBX1 loss-of-function study in vitro. Muscle fiber types analysis showed type I and type IIX/IIAX fibers proportion were significantly different between AIS concave and convex but not in two sides of CS. LBX1, myogenic markers and one myokine were significantly imbalanced in AIS but not in CS. Loss-of-function study showed knockdown of LBX1 could inhibit myogenic markers expression and myokines as well. This study provides new insight into the association between imbalanced paraspinal muscle and potential muscle-bone crosstalk in AIS patients and the biological function of predisposing gene LBX1. Further investigation with appropriate animal models is warranted to explore if asymmetric expression of LBX1 could result in distinct muscle phenotypes and bone qualities thus affect the progression of spine curvature in AIS.
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Conference papers on the topic "Multi-Dimensional modulations"

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Fang, Juing, Alain Karas, and Xiao-Young Guo. "Performances of multi-dimensional trellis coded phase modulations over nonlinear satellite channel." In 15th International Communicatons Satellite Systems Conference and Exhibit. American Institute of Aeronautics and Astronautics, 1994. http://dx.doi.org/10.2514/6.1994-1147.

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Rosenkranz, Jan-Andre, and Thomas Sattelmayer. "Experimental Investigation of High Frequency Flame Response on Injector Coupling in a Perfectly Premixed Multi-Jet Combustor." In ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gt2023-101417.

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Abstract High frequency injector-coupled thermoacoustic instabilities are a major threat to multi-jet combustors in rocket and gas turbine engines. The complex three-dimensional acoustic coupling between the combustion chamber and injector acoustics cause local fluctuations in heat release. In turn, multiple thermoacoustic feedback mechanisms close the thermoacoustic loop and serve as a source of the thermoacoustic instability. Except for the flame deformation and flame displacement mechanism, the underlying feedback mechanisms for high frequency instabilities are to a large extent unknown. Th
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Wong, Tze C., and Hyuck M. Kwon. "Multi-dimensional modulation for multi-path fading channels: Performance analysis." In MILCOM 2010 - 2010 IEEE Military Communications Conference. IEEE, 2010. http://dx.doi.org/10.1109/milcom.2010.5680235.

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Eiselt, Michael H., Annika Dochhan, and Helmut Griesser. "Multi-Dimensional Modulation Formats for Adaptive Optical Transmission." In Asia Communications and Photonics Conference. OSA, 2013. http://dx.doi.org/10.1364/acp.2013.af1f.1.

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Eiselt, Michael, Annika Dochhan, and Helmut Griesser. "Multi-Dimensional Modulation Formats for Adaptive Optical Transmission." In Asia Communications and Photonics Conference. OSA, 2013. http://dx.doi.org/10.1364/acpc.2013.af1f.1.

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Ling, Wei, Bin Chen, and Yi Lei. "Orthant-Symmetric Multi-dimensional Geometrically-Shaped Modulation Optimization." In 2021 19th International Conference on Optical Communications and Networks (ICOCN). IEEE, 2021. http://dx.doi.org/10.1109/icocn53177.2021.9563720.

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Duran, Mario J., and Emil Levi. "Multi-Dimensional Approach to Multi-Phase Space Vector Pulse Width Modulation." In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. IEEE, 2006. http://dx.doi.org/10.1109/iecon.2006.347436.

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Wong, Tze C., Hyuck M. Kwon, and Amitav Mukherjee. "Hybrid Multi-Dimensional Modulation for Gaussian and Fading Channels." In 2010 IEEE Vehicular Technology Conference (VTC 2010-Fall). IEEE, 2010. http://dx.doi.org/10.1109/vetecf.2010.5594209.

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Bendimerad, Djalal F., Huijian Zhang, Ingmar Land, and Hartmut Hafermann. "Partially Ordered Statistics Demapping for Multi-Dimensional Modulation Formats." In Optical Fiber Communication Conference. OSA, 2019. http://dx.doi.org/10.1364/ofc.2019.w3h.5.

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Zhao, Xiaodi, Xuanhan Zhou, Jun Xiong, Fang Li, and Ling Wang. "Automatic Modulation Recognition Based on Multi-Dimensional Feature Extraction." In 2020 International Conference on Wireless Communications and Signal Processing (WCSP). IEEE, 2020. http://dx.doi.org/10.1109/wcsp49889.2020.9299797.

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