This paper proposes the QUATRID scheme (QUAntized Transform ResIdual Decision), which enhances coding efficiency by incorporating the Quantized Transform Decision Mode (QUAM) at the encoder stage. A pivotal element of the QUATRID scheme is the integration of a new QUAM method into the DRVC process. This integration purposely avoids the zero quantized transform (QT) modules. Therefore, the quantity of input bit planes subjected to channel encoding is minimized, leading to a reduction in the computational intricacy of both channel encoding and decoding. Furthermore, a web-based correlation noise model (CNM), tailored to the QUATRID scheme, is integrated into its decoding process. The online CNM system for this channel decoding process contributes to a lower bit rate. A method for the reconstruction of the residual frame (R^) is developed, incorporating decision mode information from the encoder, the decoded quantized bin, and the transformed residual frame estimate. Analysis of experimental outcomes using the Bjntegaard delta method demonstrates that the QUATRID achieves better results than the DISCOVER, producing a PSNR of 0.06 to 0.32 dB and coding efficiency varying between 54% and 1048%. Furthermore, the findings demonstrate that, across all motion video types, the QUATRID scheme surpasses DISCOVER in its capacity to minimize the number of input bit-planes requiring channel encoding, as well as overall encoder computational load. Bit plane reduction surpasses 97%, while Wyner-Ziv encoder and channel coding complexity are reduced by more than nine-fold and 34-fold, respectively.
This work's central drive is to examine and procure reversible DNA codes of length n, showcasing superior parameters. This study commences by examining the structure of cyclic and skew-cyclic codes over the chain ring defined by R=F4[v]/v^3. Employing a Gray map, we establish a link between the codons and the elements within R. Under the representation of this gray map, we scrutinize reversible and DNA-encoded strings of length n. Finally, newly discovered DNA codes demonstrate enhanced parameters in contrast to existing codes. Furthermore, we calculate the Hamming and Edit distances for these codes.
A key objective of this paper is the evaluation of homogeneity between two multivariate datasets to establish if they arise from the same distribution. This problem, a natural occurrence in diverse applications, has many associated methods detailed in the literature. Based on the profundity of the data, various tests have been suggested to address this difficulty, though their effectiveness might be limited. Considering the newfound significance of data depth in quality assurance, we introduce two alternative test statistics for assessing multivariate two-sample homogeneity. The proposed test statistics exhibit a uniform 2(1) asymptotic null distribution under the null hypothesis. The generalization of the proposed tests to handle multiple variables and multiple samples is presented. Simulations show the proposed tests to possess a superior performance. Two real-world data examples demonstrate the test procedure.
This paper introduces a novel, linkable ring signature scheme. The hash value calculation for the public key within the ring, and the private key of the signer, rely on randomly generated numbers. In our constructed system, this setting automatically manages the linkable label, thus removing the need for a separate one. To evaluate linkability, ascertain whether the count of elements present in both sets crosses a threshold relative to the ring's member count. The unforgeability property, in the random oracle model, is equivalent to the challenge posed by the Shortest Vector Problem. Anonymity is established through the use of statistical distance and its inherent characteristics.
Harmonic and interharmonic components with frequencies that are close together experience overlapping spectra as a result of the signal windowing's induced spectrum leakage and the limited frequency resolution. Dense interharmonic (DI) components positioned near the prominent peaks within the harmonic spectrum cause a notable decline in harmonic phasor estimation accuracy. To address this problem, we propose a harmonic phasor estimation method that accounts for interference from the DI source. Analyzing the dense frequency signal's spectral features, specifically the phase and amplitude, allows for the identification of DI interference. Following this, the establishment of an autoregressive model relies on the signal's autocorrelation. The sampling sequence is leveraged for data extrapolation, thereby enhancing frequency resolution and diminishing interharmonic interference. Methylene Blue inhibitor Finally, the estimated numerical values for harmonic phasor, frequency, and the rate at which frequency changes are calculated and obtained. The proposed method for estimating harmonic phasor parameters, as demonstrated by simulation and experimental data, exhibits a high degree of accuracy even when disturbances are present in the signal, showing good noise reduction and responsiveness to changes.
A fluid-like aggregation of identical stem cells gives rise to all specialized cells during the process of early embryonic development. The differentiation pathway unfolds through a sequence of symmetry-reducing steps, commencing from the high symmetry of stem cells and culminating in the low symmetry of specialized cells. An analogous situation to phase transitions in statistical mechanics is evident here. We model embryonic stem cell (ESC) populations using a coupled Boolean network (BN) model to theoretically evaluate this hypothesis. A multilayer Ising model, which includes paracrine and autocrine signaling, together with external interventions, is utilized to apply the interaction. It has been shown that the diversity in cellular characteristics can be understood as a composite of steady-state probability distributions. Models incorporating gene expression noise and interaction strengths, as validated through simulations, demonstrate a range of first- and second-order phase transitions in response to varying system parameters. Spontaneous symmetry-breaking, driven by these phase transitions, creates new cell types, distinguished by their diverse steady-state distributions. The self-organizing capabilities of coupled biological networks manifest in states enabling spontaneous cellular differentiation.
Within the field of quantum technologies, quantum state processing holds a prominent position. In spite of the complexity and potential for non-ideal control in real systems, their dynamics can nevertheless approximate simplified behaviors, mostly restricted to a low-energy Hilbert subspace. The simplest approximation technique, adiabatic elimination, permits us to derive, in specific cases, an effective Hamiltonian working within a limited-dimensional Hilbert subspace. While these approximations offer estimates, they can be prone to ambiguities and difficulties, hindering systematic improvement in their accuracy within progressively larger systems. Methylene Blue inhibitor The Magnus expansion is employed here to systematically derive effective Hamiltonians that are unambiguous. A crucial aspect of the approximations' validity is the proper time-averaging of the exact dynamical processes. Suitably adjusted quantum operation fidelities substantiate the accuracy of the determined effective Hamiltonians.
For two-user downlink non-orthogonal multiple access (PN-DNOMA) channels, a joint polar coding and physical network coding (PNC) method is proposed in this paper, due to the limitation of successive interference cancellation-aided polar decoding in achieving optimality for finite blocklength transmissions. Employing the proposed scheme, we initially generated the XORed message from the two user messages. Methylene Blue inhibitor In preparation for broadcast, the XORed message was combined with the transmission from User 2. By leveraging the PNC mapping rule coupled with polar decoding, User 1's message is directly recovered. Correspondingly, at User 2's location, a more extensive polar decoder structure was created for obtaining the user's message. The channel polarization and decoding performance of both users is readily upgradable. We additionally optimized the power assignment for the two users, considering the unique channel characteristics of each, while guaranteeing user fairness and performance. In two-user downlink NOMA systems, the simulation results for the PN-DNOMA approach indicated an approximate performance enhancement of 0.4 to 0.7 decibels in comparison to existing methodologies.
Employing a mesh-model-based merging (M3) technique, and four foundational graph models, a double protograph low-density parity-check (P-LDPC) code pair was developed for joint source-channel coding (JSCC) applications recently. Crafting the protograph (mother code) of the P-LDPC code, achieving a robust waterfall region while minimizing the error floor, remains a significant hurdle, with limited prior work. This paper presents an improved single P-LDPC code, intended to further evaluate the applicability of the M3 method. Its construction differs from the channel code utilized within the JSCC. This construction approach leads to a variety of new channel codes with the advantageous attributes of lower power consumption and higher reliability. The proposed code, featuring a structured design and superior performance, clearly indicates its hardware-friendliness.
We detail a model in this paper, analyzing how diseases and their associated information spread through interconnected networks with multiple layers. Subsequently, considering the attributes of the SARS-CoV-2 pandemic, we assessed the effect of information blockage on the transmission of the virus. Our research indicates that inhibiting the propagation of information alters the tempo at which the epidemic reaches its peak in our population, and subsequently modifies the total number of individuals contracting the illness.
In light of the frequent conjunction of spatial correlation and heterogeneity within the data, we propose a spatial varying-coefficient model with a single index.