Resource-constrained small cells (SCs) require a distributive and dynamic codebook that adapts to the rapid incoming and outgoing clients, which is in contrast with large centralized codebooks for many traditional fin...
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ISBN:
(数字)9798331508050
ISBN:
(纸本)9798331508067
Resource-constrained small cells (SCs) require a distributive and dynamic codebook that adapts to the rapid incoming and outgoing clients, which is in contrast with large centralized codebooks for many traditional finite rate feedback (FRF) systems. This paper discusses the distributive and dynamic codebook approach for SCs. The mapping strategy for the quantization codes to the possible combination of outcomes of the code generator is meticulously detailed. To contain the code quantization error (CQE), which could occur due to the quantization of two or more channel realizations with a single quantization code, we propose a simple and pragmatic null algorithm for the codebook. The efficiency of the algorithm in reducing CQE in a codebook is presented with an analytical expression. We observe that the efficiency of the algorithm in reducing CQE increases with increasing receiving antennas, which is suitable for the densely deployed SC environment. Our simulated study shows that for given quantization codes $B^{\prime}$ , number of transmitter antennas $N$ and number of receiver antennas $M^{\prime}$ , the efficiency of the algorithm in reducing CQE in a codebook is found to be as high as 97.8 %.
Bioactive glass is a promising material for biomedical applications due to the presence of biologically active ions. In this article, we explored sustainable and cost-effective substitutes for pure quartz glass by uti...
Bioactive glass is a promising material for biomedical applications due to the presence of biologically active ions. In this article, we explored sustainable and cost-effective substitutes for pure quartz glass by utilizing rice-husk-extracted silica for wound healing applications. Two new bioglasses (rice-husk silica glass (RSG) and quartz silica glass (QSG)) were synthesized by using rice-husk extracted silica and pure quartz silica, respectively, and their physiochemical and biological properties were compared with the conventional 45S5 bioglass. Different biological assays like zone of inhibition, colony counting, and morphology analysis by electron microscopy confirmed the potent antibacterial activities of the newly developed bioglasses. Antioxidant assays and cytotoxicity assays proved that these bioglasses are biocompatible and promote normal cell proliferation. Finally,in vivowound healing studies carried out in the rat model demonstrated rapid wound healing properties of the RSG bioglass. This study explores sustainable approaches of utilizing biomass derived silica for synthesizing bioactive glasses for biomedical applications.
The combination of ultrasonic and acid fracturing fluid can strengthen the modification effect on the micropore structure of the coal matrix,thereby enhancing the efficiency of the acid fracturing *** this research,ac...
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The combination of ultrasonic and acid fracturing fluid can strengthen the modification effect on the micropore structure of the coal matrix,thereby enhancing the efficiency of the acid fracturing *** this research,acetic acid was utilized to formulate acid fracturing fluids with varying concentrations,and the evolutionary traits of both the acid fracturing fluids and ultrasonic waves in relation to coal samples were *** functional group structure,mineral composition,micropore structure and surface morphology of coal samples were characterized by FTIR,XRD,N_(2)adsorption at low temperature and *** results showed that aromatics(I)and branching parameters(CH_(2)/CH_(3))were reduced by 81.58%and 88.67%,respectively,after 9%acetic acid *** acid can dissolve carbonates and clay minerals in coal,create new pores,and increase porosity,pore volume and pore fractal *** modification by 7%acetic acid,the pore volume increased by 5.7 *** observation shows that the diameter of coal surface holes increases,EDS scanning shows that the content of mineral elements in coal decreases,the connectivity of coal holes increases,and the holes *** findings of this research offer theoretical direction for optimizing ultrasonic-enhanced acid fracturing fluid modification.
Language Models [LMs] are now playing an increasingly large role in information generation and synthesis;the representation of scientific knowledge in these systems needs to be highly accurate. A prime challenge is ha...
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Hybrid electrochemical devices(HEDs),which consist of one faradaic electrode and the other capacitive electrode,are considered as promising technologies owing to their high ion storage capacity,excellent rate performa...
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Hybrid electrochemical devices(HEDs),which consist of one faradaic electrode and the other capacitive electrode,are considered as promising technologies owing to their high ion storage capacity,excellent rate performance,and long *** particular,MXenes have been extensively investigated as faradaic electrodes of HEDs owing to their fast electron and ion transport capabilities and diverse and tunable surface ***,we provide a comprehensive review on the design strategies for enhancing the electrochemical performances of MXenes in HEDs,focusing on interlayer engineering,surface modification,and hybrid *** also summarize the recent advancement in the use of MXenes in metal-ion hybrid capacitors and hybrid capacitive ***,we address the current challenges for the practical application of MXene-based hybrid devices and offer our perspectives for future research *** review aims to provide insights into innovative MXene design strategies for electrochemical energy storage and water purification by elucidating the correlations between material chemistry and electrochemical properties of MXenes.
To cope with the complex dynamic characteristics brought about by the sharp increase in penetration of various power electronic devices, online dynamic security analysis in modern power systems has put forward higher ...
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The rheological performance of asphalt mastics is significantly influenced by the type and characteristics of mineral fillers. This study investigates the potential of shale and pumice as alternative fillers to conven...
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The battery-electric mining haul truck (MHT) enables zero tailpipe emissions and reduces operating costs if coupled with sufficient renewable energy generation. However, the quick degradation of the onboard battery en...
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This study aims to develop a compact, low-cost, and high-performance benchtop small-animal PET/MRI scanner that achieves functional and anatomical image fusion. The system is designed to address challenges in cost red...
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We performed ab initio molecular dynamics simulations for CH4−H2S mixtures at temperatures ranging from 3000 to 10 000 K and pressures up to 1500 GPa. We calculated pair distribution functions and bond-overlap populat...
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We performed ab initio molecular dynamics simulations for CH4−H2S mixtures at temperatures ranging from 3000 to 10 000 K and pressures up to 1500 GPa. We calculated pair distribution functions and bond-overlap populations to examine the structural and chemical bonding properties of this mixed system. The results indicate the breaking of C–H and S–H bonds, followed by the formation of strong covalent C–C and C–S bonds, suggesting phase separation between hydrogen and heavier atoms such as carbon and sulfur. Moreover, our findings reveal that hydrogen sulfide promotes the molecular dissociation of methane and facilitates carbon aggregation below ∼200 GPa at 4000 K. However, above this pressure, it potentially inhibits carbon aggregation because of the strong correlation between carbon and sulfur atoms. Our insights into the microscopic behavior of this mixture can potentially enhance the understanding of diamond formation processes within the icy giants Uranus and Neptune.
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