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  • World Scientific Pub Co Pte Ltd  (20)
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  • World Scientific Pub Co Pte Ltd  (20)
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  • 1
    Online Resource
    Online Resource
    Quasi-automatic semigroups
    World Scientific Pub Co Pte Ltd ; 2021
    In:  Asian-European Journal of Mathematics Vol. 14, No. 03 ( 2021-03), p. 2150046-
    Details
    In: Asian-European Journal of Mathematics, World Scientific Pub Co Pte Ltd, Vol. 14, No. 03 ( 2021-03), p. 2150046-
    Abstract: Quasi-automatic semigroups are extensions of a Cayley graph of an automatic group. Of course, a quasi-automatic semigroup generalizes an automatic semigroup. We observe that a semigroup [Formula: see text] may be automatic only when [Formula: see text] is finitely generated, while a semigroup may be quasi-automatic but it is not necessary finitely generated. Similar to the usual automatic semigroups, a quasi-automatic semigroup is closed under direct and free products. Furthermore, a semigroup [Formula: see text] is graph automatic if and only if [Formula: see text] with a zero element adjoined is graph automatic, and also a semigroup [Formula: see text] is graph automatic if and only if [Formula: see text] with an identity element adjoined is graph automatic. However, the class of quasi-automatic semigroups is a much wider class than the class of automatic semigroups. In this paper, we show that every automatic semigroup is quasi-automatic but the converse statement is not true (see Example ??). In addition, we notice that the quasi-automatic semigroups are invariant under the changing of generators, while a semigroup may be automatic with respect to a finite generating set but not the other. Finally, the connection between the quasi-automaticity of two semigroups [Formula: see text] and [Formula: see text] , where [Formula: see text] is a subsemigroup with finite Rees index in [Formula: see text] will be investigated and considered.
    Type of Medium: Online Resource
    ISSN: 1793-5571 , 1793-7183
    URL: Article
    DOI: 10.1142/S1793557121500467
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2021
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  • 2
    Online Resource
    Online Resource
    Preparation of Graphene Oxide/Chitosan Pellets and Their Adsorption Properties for Congo Red
    World Scientific Pub Co Pte Ltd ; 2019
    In:  International Journal of Nanoscience Vol. 18, No. 05 ( 2019-10), p. 1850030-
    Details
    In: International Journal of Nanoscience, World Scientific Pub Co Pte Ltd, Vol. 18, No. 05 ( 2019-10), p. 1850030-
    Abstract: A facile and easily separated adsorbent, graphene oxide (GO) pellets wrapped by chitosan (GOP) were prepared. Batch adsorption studies were carried out to study the adsorption properties of congo red onto GOP by varying the experimental parameters such as the contact time, the initial concentration of congo red, the solution pH, the adsorbent dose, and the temperature. The kinetic studies showed that the adsorption data fitted a pseudo-second-order model well. The isotherm analysis showed that the adsorption data fitted the Freundlich model well. The adsorption mechanism was mainly attributed to electrostatic interactions, [Formula: see text]–[Formula: see text] stacking interaction, hydrogen bond, and van der Waals force. Thermodynamic studies indicated that the adsorption process was endothermic and spontaneous.
    Type of Medium: Online Resource
    ISSN: 0219-581X , 1793-5350
    URL: Article
    DOI: 10.1142/S0219581X18500308
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2019
    SSG: 11
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  • 3
    Online Resource
    Online Resource
    Underwater unidirectional acoustic transmission through a plate with bilateral asymmetric gratings
    World Scientific Pub Co Pte Ltd ; 2018
    In:  Modern Physics Letters B Vol. 32, No. 11 ( 2018-04-20), p. 1850133-
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 32, No. 11 ( 2018-04-20), p. 1850133-
    Abstract: In this paper, a novel underwater unidirectional acoustic transmission (UAT) device consisting of a plate with bilateral asymmetric gratings is proposed and numerically investigated. The transmission spectra, the acoustic intensity field distributions, and the displacement field distributions are numerically calculated based on the finite element method. The transmission spectra show that the proposed device exhibits different UAT effects in three bands. The acoustic intensity field distributions demonstrate that the proposed device can realize UAT, which agree well with the transmission spectra. The mechanism is discussed by analyzing the displacement field distributions, and the UAT is attributed to the symmetric mode excited in brass plate. Furthermore, the effects of the lattice constant, the upper slit width, and the lower slit width on bands are discussed. Our design provides a good reference for designing underwater UAT devices and has potential applications in some fields, such as medical ultrasonic devices, acoustic barrier, and noise insulation.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984918501336
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2018
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  • 4
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    Broadband ventilated metamaterial silencer for high reflection based on Fano-like interference
    World Scientific Pub Co Pte Ltd ; 2021
    In:  International Journal of Modern Physics B Vol. 35, No. 06 ( 2021-03-10), p. 2150087-
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 35, No. 06 ( 2021-03-10), p. 2150087-
    Abstract: Conventional sound shielding structures is difficult to meet the requirements of low-to-middle frequency broadband sound insulation and free ventilation. In this paper, we propose a ventilated metamaterial silencer based on Fano-like interference, which can achieve the sound transmission loss (STL) of more than 10 dB in the range of 516–970 Hz with subwavelength thickness (0.11 [Formula: see text]) while remains an opening area ratio of 23%. The designed silencer is composed of a large central orifice and four surrounding coiling channels, making the sound waves passing through the two areas generate Fano-like asymmetric transmission spectrum and form efficient reflection to insulate sound coming from various directions. The parametric studies are also carried out to investigate the tunable acoustic performance. Experiment measurement matches well with the simulation results. In the future, the proposed silencer may have potential applications in practical environments requiring broadband sound insulation and free air flows.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979221500879
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2021
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  • 5
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    A time simulated annealing-back propagation algorithm and its application in disease prediction
    World Scientific Pub Co Pte Ltd ; 2018
    In:  Modern Physics Letters B Vol. 32, No. 25 ( 2018-09-10), p. 1850303-
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 32, No. 25 ( 2018-09-10), p. 1850303-
    Abstract: In this paper, based on the Back Propagation (BP) neural network algorithm, we introduce the idea of the Simulated Annealing (SA), and then propose a new neural network algorithm: Time Simulated Annealing-Back Propagation (TSA-BP) algorithm. The proposed algorithm can improve the convergence rate and numerical stability. By using this proposed algorithm, the learning rates and initial weights in the BP neural network could be easily adjusted. We show that the TSA-BP algorithm could reduce the errors caused by human-made factors. Several numerical experiments have been tested by using different disease data. Furthermore, we compared the TSA-BP algorithm to the other existing, well-known algorithms. Numerical results show higher accuracy and efficiency of the TSA-BP algorithm.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984918503037
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2018
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  • 6
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    THERMAL CONDUCTIVITY OF NANOPOROUS GLASS ALUMINA FILM AND COMPOSITES
    World Scientific Pub Co Pte Ltd ; 2014
    In:  Modern Physics Letters B Vol. 28, No. 03 ( 2014-01-30), p. 1450019-
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 28, No. 03 ( 2014-01-30), p. 1450019-
    Abstract: In this paper, cross-plane thermal conductivities of the nanoporous glass alumina film (NGAF) and its composites ( Ag /NGAF, with Ag nanowires embedded in) were measured. And a model was setup to predict the thermal conductivity of the nanoporous material. Results show that the thermal conductivity of the NGAF is about 50 times smaller than that of the ceramic alumina. It is about 0.5 W ⋅ m -1 ⋅ K -1 and depends on both the pore radius and the porosity. The thermal conductivity of the Ag /NGAF is not larger than that of the NGAF. The contact resistance and the unfilled space between Ag nanowires and the matrix are responsible for that.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984914500195
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2014
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  • 7
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    Kernel differential subgraph reveals dynamic changes in biomolecular networks
    World Scientific Pub Co Pte Ltd ; 2018
    In:  Journal of Bioinformatics and Computational Biology Vol. 16, No. 01 ( 2018-02), p. 1750027-
    Details
    In: Journal of Bioinformatics and Computational Biology, World Scientific Pub Co Pte Ltd, Vol. 16, No. 01 ( 2018-02), p. 1750027-
    Abstract: Many major diseases, including various types of cancer, are increasingly threatening human health. However, the mechanisms of the dynamic processes underlying these diseases remain ambiguous. From the holistic perspective of systems science, complex biological networks can reveal biological phenomena. Changes among networks in different states influence the direction of living organisms. The identification of the kernel differential subgraph (KDS) that leads to drastic changes is critical. The existing studies contribute to the identification of a KDS in networks with the same nodes; however, networks in different states involve the disappearance of some nodes or the appearance of some new nodes. In this paper, we propose a new topology-based KDS (TKDS) method to explore the core module from gene regulatory networks with different nodes in this process. For the common nodes, the TKDS method considers the differential value (D-value) of the topological change. For the different nodes, TKDS identifies the most similar gene pairs and computes the D-value. Hence, TKDS discovers the essential KDS, which considers the relationships between the same nodes as well as different nodes. After applying this method to non-small cell lung cancer (NSCLC), we identified 30 genes that are most likely related to NSCLC and extracted the KDSs in both the cancer and normal states. Two significance functional modules were revealed, and gene ontology (GO) analyses and literature mining indicated that the KDSs are essential to the processes in NSCLC. In addition, compared with existing methods, TKDS provides a unique perspective in identifying particular genes and KDSs related to NSCLC. Moreover, TKDS has the potential to predict other critical disease-related genes and modules.
    Type of Medium: Online Resource
    ISSN: 0219-7200 , 1757-6334
    URL: Article
    DOI: 10.1142/S0219720017500275
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2018
    SSG: 12
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  • 8
    Online Resource
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    U -Concordant Semigroups
    World Scientific Pub Co Pte Ltd ; 2018
    In:  Algebra Colloquium Vol. 25, No. 02 ( 2018-06), p. 295-318
    Details
    In: Algebra Colloquium, World Scientific Pub Co Pte Ltd, Vol. 25, No. 02 ( 2018-06), p. 295-318
    Abstract: We introduce the relations [Formula: see text] and [Formula: see text] with respect to a subset U of idempotents. Based on [Formula: see text] and [Formula: see text] , we define a new class of semigroups which we name U-concordant semigroups. Our purpose is to describe U-concordant semigroups by generalized categories over a regular biordered set. We show that the category of U-concordant semigroups and admissible morphisms is isomorphic to the category of RBS generalized categories and pseudo functors. Our approach is inspired from Armstrong’s work on the connection between regular biordered sets and concordant semigroups. The significant difference in strategy is by using RBS generalized categories equipped with pre-orders, we have no need to discuss the quotient of a category factored by a congruence.
    Type of Medium: Online Resource
    ISSN: 1005-3867 , 0219-1733
    URL: Article
    DOI: 10.1142/S1005386718000214
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2018
    detail.hit.zdb_id: 1480585-6
    SSG: 17,1
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  • 9
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    Minimizing Energy of Heterogeneous Computing Systems by Task Scheduling Approach,
    World Scientific Pub Co Pte Ltd ; 2020
    In:  Journal of Circuits, Systems and Computers Vol. 29, No. 12 ( 2020-09-30), p. 2050194-
    Details
    In: Journal of Circuits, Systems and Computers, World Scientific Pub Co Pte Ltd, Vol. 29, No. 12 ( 2020-09-30), p. 2050194-
    Abstract: As an important component of computer system, GPU has been used more widely in the system under the support of general computing. In addition to focusing on its performance, the issues of its energy consumption and environmental problem have gradually attracted the concerns of researchers, computer architects, and developers. Current researches only consider single-task scheduling for saving energy, lacking the focus on energy saving from scheduling the overall tasks. In view of the shortcomings of current researches, we propose a METS (Minimizing Execution Time Slot) approach to reduce energy by rationally allocating the tasks across GPUs. It first collects the number of tasks and the corresponding estimated performance information. Next, it decides whether to turn the problem into a 0–1 knapsack problem or to use FIFO method based on the number of tasks. Then, we conduct our experiment on typical platform to verify our proposed approach. The experimental results show that METS can save on average 8.43% of energy when compared with the existing approaches. This shows that the proposed METS method is effective, reasonable and feasible.
    Type of Medium: Online Resource
    ISSN: 0218-1266 , 1793-6454
    URL: Article
    DOI: 10.1142/S0218126620501947
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2020
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  • 10
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    AUTOMATED SLEEP STAGING TECHNIQUE BASED ON THE EMPIRICAL MODE DECOMPOSITION ALGORITHM: A PRELIMINARY STUDY
    World Scientific Pub Co Pte Ltd ; 2010
    In:  Advances in Adaptive Data Analysis Vol. 02, No. 02 ( 2010-04), p. 267-276
    Details
    In: Advances in Adaptive Data Analysis, World Scientific Pub Co Pte Ltd, Vol. 02, No. 02 ( 2010-04), p. 267-276
    Abstract: An automatic sleep staging method is proposed to score wakefulness and three nonrapid eye movement (NREM) stages S1, S2 and S3, based on the Empirical Mode Decomposition (EMD) algorithm. Patients with sleep disorders were tested using this method. Good agreements between manual and automatic staging results were achieved in terms of their Cohen's Kappa value.
    Type of Medium: Online Resource
    ISSN: 1793-5369 , 1793-7175
    URL: Article
    DOI: 10.1142/S1793536910000483
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2010
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