Статті в журналах: "Mixed scheme"

1

Shi, Zhuo. "Mixed Loop Scheme and it’s Industry Application." Advanced Materials Research 201-203 (February 2011): 356–60. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.356.

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This paper presents a unified and mixed interpolatory and approximation subdivision scheme for triangular meshes. It can be used to solve the "popping effect" problem when switching between meshes at different levels of resolution. The scheme generates surfaces coincidence with the Loop subdivision scheme in the limit condition having the coefficient k equal 0. When k equal 1, it will be changed into a new interpolatory subdivision scheme. A new set of rules is designed for computing the newly inserted vertices around extraordinary masks. Eigen-structure analysis demonstrates that subdivision surfaces generated using the new schemes are C1 continuous. The method is a completely simple one without constructing and solving equations. The example of British Museum shell design show the great flexibility advantage of mixed subdivision design method in shell architecture, even in other industry design field.

2

Slović, Dragoslav, Ivan Tomašević, and Dragana Stojanović. "The effect of mixed wage incentives on performance: an action research report." Journal of East European Management Studies 28, no. 3 (2023): 504–32. http://dx.doi.org/10.5771/0949-6181-2023-3-504.

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The purpose of this paper is to analyse whether a mixed incentives scheme can positively influence company performance. The research report documents the design and implementation of a mixed wage incentives scheme to an apparel manufacturer in Serbia. The scheme was designed as a combination of individual- and group-based incentives with the wage fund based on group performance and allocated based on individual performance. The effects on performance were measured continuously over a period of forty-four months through labour productivity when applying individual, group, and mixed incentives, respectively. The results show that mixed incentives resulted in significant labour productivity increase, and outperformed both the individual- and group-based wage incentives schemes. The scheme promotes cooperation, team effort, information, and knowledge sharing, while maintaining individual accountability. Apart from the effect on performance, mixed incentives implementation positively affected employees’ attitude towards work, their motivation to improve, and learn new skills.

3

Liu, Yang, Hong Li, Jinfeng Wang, and Wei Gao. "A New Positive Definite Expanded Mixed Finite Element Method for Parabolic Integrodifferential Equations." Journal of Applied Mathematics 2012 (2012): 1–24. http://dx.doi.org/10.1155/2012/391372.

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A new positive definite expanded mixed finite element method is proposed for parabolic partial integrodifferential equations. Compared to expanded mixed scheme, the new expanded mixed element system is symmetric positive definite and both the gradient equation and the flux equation are separated from its scalar unknown equation. The existence and uniqueness for semidiscrete scheme are proved and error estimates are derived for both semidiscrete and fully discrete schemes. Finally, some numerical results are provided to confirm our theoretical analysis.

4

Oliver, Emily J., Caroline Dodd-Reynolds, Adetayo Kasim, and Dimitrios Vallis. "Inequalities and Inclusion in Exercise Referral Schemes: A Mixed-Method Multi-Scheme Analysis." International Journal of Environmental Research and Public Health 18, no. 6 (March 16, 2021): 3033. http://dx.doi.org/10.3390/ijerph18063033.

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Physical activity prescription, commonly through exercise referral schemes, is an established disease prevention and management pathway. There is considerable heterogeneity in terms of uptake, adherence, and outcomes, but because within-scheme analyses dominate previous research, there is limited contextual understanding of this variance. Both the impact of schemes on health inequalities and best practices for inclusion of at-risk groups are unclear. To address this, we modelled secondary data from the multi-scheme National Referral Database, comprising 23,782 individuals across 14 referral schemes, using a multilevel Bayesian inference approach. Scheme-level local demographics identified over-sampling in uptake; on the basis of uptake and completion data, more inclusive schemes (n = 4) were identified. Scheme coordinators were interviewed, and data were analyzed using a grounded theory approach. Inequalities presented in a nuanced way. Schemes showed promise for engaging populations at greater risk of poor health (e.g., those from more deprived areas or of an ethnic minority background). However, the completion odds were lower for those with a range of complex circumstances (e.g., a mental health-related referral). We identified creative best practices for widening access (e.g., partnership building), maintaining engagement (e.g., workforce diversity), and tailoring support, but recommend changes to wider operational contexts to ensure such approaches are viable.

5

Wang, Rong, and Ying-Yu Niu. "Population transfer through multiple channels in two harmonic laser pulses." Journal of Theoretical and Computational Chemistry 19, no. 05 (July 24, 2020): 2050023. http://dx.doi.org/10.1142/s0219633620500236.

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The processes of population transfer in the ground electronic state of HCl molecule through the three transition schemes are investigated by numerically solving the time-dependent Schrödinger equation. Two harmonic pulses are employed to induce population transfer and the relative phase of the two pulses can control the final population distributions. In the ladder transition scheme, the variation range of the target population with the relative phase is nearly 100% which is larger than that in the multi-photon transition scheme. It is more efficient for the mixed transition scheme to control population transfer between the initial and target states by using the relative phase. Comparing with the multi-photon and ladder schemes, the transition probability of the target population is more sensitive to the two pulse amplitudes in the mixed transition scheme.

6

DRONIOU, JÉRÔME, ROBERT EYMARD, THIERRY GALLOUËT, and RAPHAÈLE HERBIN. "A UNIFIED APPROACH TO MIMETIC FINITE DIFFERENCE, HYBRID FINITE VOLUME AND MIXED FINITE VOLUME METHODS." Mathematical Models and Methods in Applied Sciences 20, no. 02 (February 2010): 265–95. http://dx.doi.org/10.1142/s0218202510004222.

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We investigate the connections between several recent methods for the discretization of anisotropic heterogeneous diffusion operators on general grids. We prove that the Mimetic Finite Difference scheme, the Hybrid Finite Volume scheme and the Mixed Finite Volume scheme are in fact identical up to some slight generalizations. As a consequence, some of the mathematical results obtained for each of the methods (such as convergence properties or error estimates) may be extended to the unified common framework. We then focus on the relationships between this unified method and nonconforming Finite Element schemes or Mixed Finite Element schemes. We also show that for isotropic operators, on particular meshes such as triangular meshes with acute angles, the unified method boils down to the well-known efficient two-point flux Finite Volume scheme.

7

Stokbro, K. "Mixed ultrasoft/norm-conserved pseudopotential scheme." Physical Review B 53, no. 11 (March 15, 1996): 6869–72. http://dx.doi.org/10.1103/physrevb.53.6869.

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8

Shen, Wuqiang, and Shaohua Tang. "RGB, a Mixed Multivariate Signature Scheme." Computer Journal 59, no. 4 (August 7, 2015): 439–51. http://dx.doi.org/10.1093/comjnl/bxv056.

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9

Feng, Y., J. Ren, and J. Jiang. "Mixed ranking scheme for video retrieval." Electronics Letters 46, no. 24 (2010): 1600. http://dx.doi.org/10.1049/el.2010.8621.

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10

Tallapragada, V. V. Satyanarayana, D. Venkat Reddy, and Suresh Varma K. N. V. "Fuzzy Joint Gaussian-Impulsive Noise Removal Using Joint Distribution Modelling in Sparse Domain." International Journal of Fuzzy System Applications 11, no. 3 (July 1, 2022): 1–15. http://dx.doi.org/10.4018/ijfsa.312216.

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Image denoising is trivial. It is considered that when multiple sources of noise act simultaneously such a task tends to be more critical. The distribution of resulting noise will possess irregular structure with heavy tail leading to fuzzy in detection and removal of noise from images. Most mixed noise removal schemes first detect the pixels with noise attack and then attempt to remove the noise. The proposed scheme is a single phase mechanism where the noise detection phase is absent. The proposed scheme uses sparse coding as a base and modifies the weight of the fidelity term so that the heavy tail of mixed noise distribution is approximated to Gaussian distribution. The simulation results prove the superiority of the proposed scheme using peak signal to noise ratio and feature similarity index. Results show that in the severe mixed noise case a PSNR improvement of 1% is achieved, whereas in the intermediate and little mixed noise cases a PSNR improvement of about 4% and 5% ae achieved.

11

Sitepu, Robinson, Fitri Maya Puspita, Elika Kurniadi, Yunita Yunita, and Shintya Apriliyani. "Mixed integer nonlinear programming (MINLP)-based bandwidth utility function on internet pricing scheme with monitoring and marginal cost." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 2 (April 1, 2019): 1240. http://dx.doi.org/10.11591/ijece.v9i2.pp1240-1248.

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<span>The development of the internet in this era of globalization has increased fast. The need for internet becomes unlimited. Utility functions as one of measurements in internet usage, were usually associated with a level of satisfaction of users for the use of information services used. There are three internet pricing schemes used, that are flat fee, usage based and two-part tariff schemes by using one of the utility function which is Bandwidth Diminished with Increasing Bandwidth with monitoring cost and marginal cost. Internet pricing scheme will be solved by LINGO 13.0 in form of non-linear optimization problems to get optimal solution. The optimal solution is obtained using the either usage-based pricing scheme model or two-part tariff pricing scheme model for each services offered, if the comparison is with flat-fee pricing scheme. It is the best way for provider to offer network based on usage based scheme. The results show that by applying two part tariff scheme, the providers can maximize its revenue either for homogeneous or heterogeneous consumers.</span>

12

Morrison, H., and J. O. Pinto. "Intercomparison of Bulk Cloud Microphysics Schemes in Mesoscale Simulations of Springtime Arctic Mixed-Phase Stratiform Clouds." Monthly Weather Review 134, no. 7 (July 1, 2006): 1880–900. http://dx.doi.org/10.1175/mwr3154.1.

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Abstract A persistent, weakly forced, horizontally extensive mixed-phase boundary layer cloud observed on 4–5 May 1998 during the Surface Heat Budget of the Arctic Ocean (SHEBA)/First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment–Arctic Clouds Experiment (FIRE–ACE) is modeled using three different bulk microphysics parameterizations of varying complexity implemented into the polar version of the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5). The two simpler schemes predict mostly ice clouds and very little liquid water, while the complex scheme is able to reproduce the observed persistence and horizontal extent of the mixed-phase stratus deck. This mixed-phase cloud results in radiative warming of the surface, the development of a cloud-topped, surface-based mixed layer, and an enhanced precipitation rate. In contrast, the optically thin ice clouds predicted by the simpler schemes lead to radiative cooling of the surface, a strong diurnal cycle in the boundary layer structure, and very weak precipitation. The larger surface precipitation rate using the complex scheme is partly balanced by an increase in the turbulent flux of water vapor from the surface to the atmosphere. This enhanced vapor flux is attributed to changes in the surface and boundary layer characteristics induced by the cloud itself, although cloud–surface interactions appear to be exaggerated in the model compared with reality. The prediction of extensive mixed-phase stratus by the complex scheme is also associated with increased surface pressure and subsidence relative to the other simulations. Sensitivity tests show that the detailed treatment of ice nucleation and prediction of snow particle number concentration in the complex scheme suppresses ice particle concentration relative to the simpler schemes, reducing the vapor deposition rate (for given values of bulk ice mass and ice supersaturation) and leading to much greater amounts of liquid water and mixed-phase cloudiness. These results suggest that the treatments of ice nucleation and the snow intercept parameter in the simpler schemes, which are based upon midlatitude observations, are inadequate for simulating the weakly forced mixed-phase clouds endemic to the Arctic.

13

ELSÄSSER, ROBERT, BURKHARD MONIEN, ROBERT PREIS, and ANDREAS FROMMER. "Optimal Diffusion Schemes and Load Balancing on Product Graphs." Parallel Processing Letters 14, no. 01 (March 2004): 61–73. http://dx.doi.org/10.1142/s0129626404001714.

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We discuss nearest neighbor load balancing schemes on processor networks which are represented by a cartesian product of graphs and present a new optimal diffusion scheme for general graphs. In the first part of the paper, we introduce the Alternating-Direction load balancing scheme, which reduces the number of load balance iterations by a factor of 2 for cartesian products of graphs. The resulting flow is theoretically analyzed and can be very high for certain cases. Therefore, we further present the Mixed-Direction scheme which needs the same number of iterations but computes in most cases a much smaller flow. In the second part of the paper, we present a simple optimal diffusion scheme for general graphs, calculating a balancing flow which is minimal in the l2 norm. It is based on the spectra of the graph representing the network and needs only m-1 iterations to balance the load with m being the number of distinct eigenvalues. Known optimal diffusion schemes have the same performance, however the optimal scheme presented in this paper can be implemented in a very simple manner. The number of iterations of optimal diffusion schemes is independent of the load scenario and, thus, they are practical for networks which represent graphs with known spectra. Finally, our experiments exhibit that the new optimal scheme can successfully be combined with the Alternating-Direction and Mixed-Direction schemes for efficient load balancing on product graphs.

14

Saad, Saad Muftah, Naser El Naily, and Faisal A. Mohamed. "Investigating the effect of DG infeed on the effective cover of distance protection scheme in mixed-MV distribution network." International Journal of Renewable Energy Development 7, no. 3 (December 15, 2018): 223–31. http://dx.doi.org/10.14710/ijred.7.3.223-231.

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The environmental and economic features of renewable energy sources have made it possible to be integrated as Distributed Generation (DG) units in distribution networks and to be widely utilized in modern distribution systems. The intermittent nature of renewable energy sources, altering operational conditions, and the complex topology of active distribution networks makes the level of fault currents significantly variable. Thus, the use of distance protection scheme instead of conventional overcurrent schemes offers an appropriate alternative for protection of modern distribution networks. In this study, the effect of integrating multiple DG units on the effective cover of distance protection schemes and the coordination between various relays in the network was studied and investigated in radiology and meshed operational topologies. Also, in cases of islanded and grid-connected modes. An adaptive distance scheme has been proposed for adequate planning of protection schemes to protect complex networks with multiple distribution sources. The simplified simulated network implemented in NEPLAN represents a benchmark IEC microgrid. The comprehensive results show an effective protection measure for secured microgrid operation.Article History: Received October 18th 2017; Received in revised form May 17th 2018; Accepted July 8th 2018; Available onlineHow to Cite This Article: Saad, S.M., Naily, N.E. and Mohamed, F.A. (2018). Investigating the Effect of DG Infeed on the Effective Cover of Distance Protection Scheme in Mixed-MV Distribution Network. International Journal of Renewable Energy Development, 7(3), 223-231.https://doi.org/10.14710/ijred.7.3.223-231

15

Zhu, Ailing. "Discontinuous Mixed Covolume Methods for Linear Parabolic Integrodifferential Problems." Journal of Applied Mathematics 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/649468.

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The semidiscrete and fully discrete discontinuous mixed covolume schemes for the linear parabolic integrodifferential problems on triangular meshes are proposed. The error analysis of the semidiscrete and fully discrete discontinuous mixed covolume scheme is presented and the optimal order error estimate in discontinuousH(div)and first-order error estimate inL2are obtained with the lowest order Raviart-Thomas mixed element space.

16

Lian, Xiaobin, Jiafu Liu, Laohu Yuan, and Naigang Cui. "Mixed fault diagnosis scheme for satellite formation." Aircraft Engineering and Aerospace Technology 90, no. 2 (March 5, 2018): 427–34. http://dx.doi.org/10.1108/aeat-11-2016-0206.

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Purpose The purpose of this paper is to present a solution for the uncertain fault with the propulsion subsystem of satellite formation, using the Lur’e differential inclusion linear state observers (DILSOs) and fuzzy wavelet neural network (FWNN) to perform fault detection and diagnosis. Design/methodology/approach The uncertain fault system cannot be described based on the accurate differential equations. The set-value mapping is introduced into the state equations to solve the problem of uncertainty, but it will cause output uncertainty. The problem can be solved by linearization of Lur’e differential inclusion state observers. The Lur’e DILSOs can be used to detect uncertain fault. The fault isolation and estimation can be performed using the FWNN. Findings The mixed approach from fault detection and diagnosis has featured fast and correct to found the uncertain fault. The simulation results to indicate that the methods of design are not only effective but also have the advantages of good approximation effect, fast detection speed, relatively simple structure and prior knowledge and realization of adaptive learning. Research limitations/implications The hybrid algorithm can be extensively applied to engineering practice and find uncertain faults of the propulsion subsystem of satellite formation promptly. Originality/value This paper provides a fast, effective and simple mixed fault detection and diagnosis scheme for satellite formation.

17

Philpott, A. B., F. Wahid, and J. F. Bonnans. "MIDAS: A mixed integer dynamic approximation scheme." Mathematical Programming 181, no. 1 (February 8, 2019): 19–50. http://dx.doi.org/10.1007/s10107-019-01368-1.

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18

Gettelman, A., and H. Morrison. "Advanced Two-Moment Bulk Microphysics for Global Models. Part I: Off-Line Tests and Comparison with Other Schemes." Journal of Climate 28, no. 3 (February 1, 2015): 1268–87. http://dx.doi.org/10.1175/jcli-d-14-00102.1.

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Abstract Prognostic precipitation is added to a cloud microphysical scheme for global climate models. Results indicate very similar performance to other commonly used mesoscale schemes in an offline driver for idealized warm rain cases, better than the previous version of the global model microphysics scheme with diagnostic precipitation. In the mixed phase regime, there is significantly more water and less ice, which may address a common bias seen with the scheme in climate simulations in the Arctic. For steady forcing cases, the scheme has limited sensitivity to time step out to the ~15-min time steps typical of global models. The scheme is similar to other schemes with moderate sensitivity to vertical resolution. The limited time step sensitivity bodes well for use of the scheme in multiscale models from the mesoscale to the large scale. The scheme is sensitive to idealized perturbations of cloud drop and crystal number. Precipitation decreases and condensate increases with increasing drop number, indicating substantial decreases in precipitation efficiency. The sensitivity is less than with the previous version of the scheme for low drop number concentrations (Nc < 100 cm−3). Ice condensate increases with ice number, with large decreases in liquid condensate as well for a mixed phase case. As expected with prognostic precipitation, accretion is stronger than with diagnostic precipitation and the accretion to autoconversion ratio increases faster with liquid water path (LWP), in better agreement with idealized models and earlier studies than the previous version.

19

Berg, Larry K., and Shiyuan Zhong. "Sensitivity of MM5-Simulated Boundary Layer Characteristics to Turbulence Parameterizations." Journal of Applied Meteorology 44, no. 9 (September 1, 2005): 1467–83. http://dx.doi.org/10.1175/jam2292.1.

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Abstract The sensitivity of high-resolution mesoscale simulations to boundary layer turbulence parameterizations is investigated using the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) and observations from two field campaigns. Three widely used turbulence parameterizations were selected for evaluation, two of which [Blackadar (BK) and Medium Range Forecast (MRF) schemes] are simple first-order nonlocal schemes and one [Gayno–Seaman (GS) scheme] of which is a more complex 1.5-order local scheme that solves a prognostic equation for turbulence kinetic energy (TKE). The two datasets are the summer 1996 Boundary Layer Experiment (BLX96) in the southern Great Plains and the autumn 2000 Vertical Transport and Mixing (VTMX) field campaign in the Salt Lake Valley in Utah. Comparisons are made between observed and simulated mean variables and turbulence statistics. Despite the differences in their complexity, all three schemes show similar skill predicting near-surface and boundary layer mean temperature, humidity, and winds at both locations. The BK and MRF schemes produced daytime boundary layers that are more mixed than those produced by the GS scheme. The mixed-layer depths are generally overestimated by the MRF scheme, underestimated by the GS scheme, and well estimated by the BK scheme. All of the schemes predicted surface latent heat fluxes that agreed reasonably well with the observed values, but they substantially overestimated surface sensible heat fluxes because of a significant overprediction of net radiation. In addition, each parameterization overestimated the sensible and latent heat flux aloft. The results suggest that there is little gain in the overall accuracy of forecasts with increasing complexity of turbulence parameterizations.

20

Yang, Yidu, Wei Jiang, Yu Zhang, Wenjun Wang, and Hai Bi. "A Two-Scale Discretization Scheme for Mixed Variational Formulation of Eigenvalue Problems." Abstract and Applied Analysis 2012 (2012): 1–29. http://dx.doi.org/10.1155/2012/812914.

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This paper discusses highly efficient discretization schemes for mixed variational formulation of eigenvalue problems. A new finite element two-scale discretization scheme is proposed by combining the mixed finite element method with the shifted-inverse power method for solving matrix eigenvalue problems. With this scheme, the solution of an eigenvalue problem on a fine gridKhis reduced to the solution of an eigenvalue problem on a much coarser gridKHand the solution of a linear algebraic system on the fine gridKh. Theoretical analysis shows that the scheme has high efficiency. For instance, when using the Mini element to solve Stokes eigenvalue problem, the resulting solution can maintain an asymptotically optimal accuracy by takingH=O(h4), and when using thePk+1-Pkelement to solve eigenvalue problems of electric field, the calculation results can maintain an asymptotically optimal accuracy by takingH=O(h3). Finally, numerical experiments are presented to support the theoretical analysis.

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Chaluvadi, Ragini, Madhuri Bolli, and Srikrishna Bhashyam. "On the Optimality of Interference Decoding Schemes for K-User Gaussian Interference Channels." Entropy 21, no. 11 (October 28, 2019): 1053. http://dx.doi.org/10.3390/e21111053.

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The sum capacity of the general K-user Gaussian Interference Channel (GIC) is known only when the channel coefficients are such that treating interference as noise (TIN) is optimal. The Han-Kobayashi (HK) scheme is an extensively studied coding scheme for the K-user interference channel (IC). Simple HK schemes are HK schemes with Gaussian signaling, no time sharing and no private-common power splitting. The class of simple HK (S-HK) schemes includes the TIN scheme and schemes that involve various levels of interference decoding and cancellation at each receiver. For the 2-user GIC, simple HK schemes are sufficient to achieve all known sum capacity results—sum capacity under mixed, strong and noisy interference conditions. We derive channel conditions under which simple HK schemes achieve sum capacity for general K-user Gaussian ICs. For the K-user GIC, these results generalize existing sum capacity results for the TIN scheme to the class of simple HK schemes.

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Ren, Jingye, Fang Zhang, Yuying Wang, Don Collins, Xinxin Fan, Xiaoai Jin, Weiqi Xu, Yele Sun, Maureen Cribb, and Zhanqing Li. "Using different assumptions of aerosol mixing state and chemical composition to predict CCN concentrations based on field measurements in urban Beijing." Atmospheric Chemistry and Physics 18, no. 9 (May 16, 2018): 6907–21. http://dx.doi.org/10.5194/acp-18-6907-2018.

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Abstract. Understanding the impacts of aerosol chemical composition and mixing state on cloud condensation nuclei (CCN) activity in polluted areas is crucial for accurately predicting CCN number concentrations (NCCN). In this study, we predict NCCN under five assumed schemes of aerosol chemical composition and mixing state based on field measurements in Beijing during the winter of 2016. Our results show that the best closure is achieved with the assumption of size dependent chemical composition for which sulfate, nitrate, secondary organic aerosols, and aged black carbon are internally mixed with each other but externally mixed with primary organic aerosol and fresh black carbon (external–internal size-resolved, abbreviated as EI–SR scheme). The resulting ratios of predicted-to-measured NCCN (RCCN_p∕m) were 0.90 – 0.98 under both clean and polluted conditions. Assumption of an internal mixture and bulk chemical composition (INT–BK scheme) shows good closure with RCCN_p∕m of 1.0 –1.16 under clean conditions, implying that it is adequate for CCN prediction in continental clean regions. On polluted days, assuming the aerosol is internally mixed and has a chemical composition that is size dependent (INT–SR scheme) achieves better closure than the INT–BK scheme due to the heterogeneity and variation in particle composition at different sizes. The improved closure achieved using the EI–SR and INT–SR assumptions highlight the importance of measuring size-resolved chemical composition for CCN predictions in polluted regions. NCCN is significantly underestimated (with RCCN_p∕m of 0.66 – 0.75) when using the schemes of external mixtures with bulk (EXT–BK scheme) or size-resolved composition (EXT–SR scheme), implying that primary particles experience rapid aging and physical mixing processes in urban Beijing. However, our results show that the aerosol mixing state plays a minor role in CCN prediction when the κorg exceeds 0.1.

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Wang, Jinfeng, Hong Li, Siriguleng He, Wei Gao, and Yang Liu. "A New Linearized Crank-Nicolson Mixed Element Scheme for the Extended Fisher-Kolmogorov Equation." Scientific World Journal 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/756281.

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We present a new mixed finite element method for solving the extended Fisher-Kolmogorov (EFK) equation. We first decompose the EFK equation as the two second-order equations, then deal with a second-order equation employing finite element method, and handle the other second-order equation using a new mixed finite element method. In the new mixed finite element method, the gradient∇ubelongs to the weaker(L2(Ω))2space taking the place of the classicalH(div;Ω)space. We prove some a priori bounds for the solution for semidiscrete scheme and derive a fully discrete mixed scheme based on a linearized Crank-Nicolson method. At the same time, we get the optimal a priori error estimates inL2andH1-norm for both the scalar unknownuand the diffusion termw=−Δuand a priori error estimates in(L2)2-norm for its gradientχ=∇ufor both semi-discrete and fully discrete schemes.

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Gu, Xiaoming, Hui Tian, Jiangning Wang, Yudong Lu, Xianzhu Jiang, and Hao Zhu. "The effect of reflux schemes in hydrogen peroxide electric pump on anti-cavitation of inducer." Journal of Physics: Conference Series 2472, no. 1 (May 1, 2023): 012030. http://dx.doi.org/10.1088/1742-6596/2472/1/012030.

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Abstract Hydrogen peroxide electric pump supply system can provide an improvement to hybrid rocket motor performance. Due to the physical and chemical properties of hydrogen peroxide, a canned pump scheme is more suitable to be used in hybrid rocket motor. The high-temperature liquid between the rotor and stator of the electric pump, returning to the inlet of the inducer, has a considerable influence on the anti-cavitation performance. The numerical simulation results show that the optimal reflux scheme is different when the inlet pressure range of the inducer is different. When the inlet pressure of the inducer is 0.4 MPa, the performance of the inducer is less affected by the reflux schemes, and the optimal scheme is the axial scheme in the simulation. When the inlet pressure is 0.12 MPa and there is a large cavitation area in the inducer, the radial reflux scheme is better than the axial and mixed reflux. When the inlet pressure is 0.1 MPa and the cavitation areas almost extend to the whole blade passage, the radial reflux scheme is much better than the axial and mixed reflux.

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Girault, Vivette, Mary F. Wheeler, Tameem Almani, and Saumik Dana. "A priori error estimates for a discretized poro-elastic–elastic system solved by a fixed-stress algorithm." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 74 (2019): 24. http://dx.doi.org/10.2516/ogst/2018071.

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We consider a poro-elastic region embedded into an elastic non-porous region. The elastic displacement equations are discretized by a continuous Galerkin scheme, while the flow equations for the pressure in the poro-elastic medium are discretized by either a continuous Galerkin scheme or a mixed scheme. Since the overall system of equations is very large, a fixed-stress algorithm is used at each time step to decouple the displacement from the flow equations in the poro-elastic region. We prove a priori error estimates for the resulting Galerkin scheme as well as the mixed scheme, with the expected order of accuracy, provided the algorithm is sufficiently iterated at each time step. These theoretical results are confirmed by a numerical experiment performed with the mixed scheme. A complete analysis including a posteriori estimates for both the Galerkin and the mixed scheme has been done but is too long to appear here.

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Reddy, G. S., and S. N. Ghosh. "Aspects of a Computational Model for Salinity Variations in a Well-Mixed Tidal Reach." Water Science and Technology 28, no. 3-5 (August 1, 1993): 659–67. http://dx.doi.org/10.2166/wst.1993.0470.

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This paper deals with the development of a computational model for predicting the salinity variation in a comparatively long and narrow well-mixed tidal reach. The model is hated on the coupled numerical solution of unsteady flow hydrodynamic equations of continuity, momentum and salinity transport using implicit finite difference scheme. The computational scheme selected is the classical double sweep algorithm, for solving a set of simultaneous linear algebraic equations. The scheme is unconditionally stable and can be used for non-uniform space and time steps. It has also a higher order of accuracy than the existing schemes. The software developed has been run with the available water level data in the Hooghly River system with appropriate initial and boundary conditions (Reddy et al., 1992). It is then adopted for production runs to provide information with regard to the variations of tidal levels, discharges and salinities.

27

Zhang, Ruxin, Zhe Yin, and Ailing Zhu. "Numerical simulations of a mixed finite element method for damped plate vibration problems." Mathematical Modelling and Control 3, no. 1 (2023): 7–22. http://dx.doi.org/10.3934/mmc.2023002.

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<abstract><p>The mixed finite element method can reduce the requirement for the smoothness of the finite element space and simplify the interpolation space for finite elements, and hence is especially effective in solving high order differential equations. In this work, we establish a mixed finite element scheme for the initial boundary conditions of damped plate vibrations and prove the existence and uniqueness of the solution of the semi-discrete and backward Euler fully discrete schemes. We use linear element approximation for the introduced intermediate variables, conduct the error analysis, and obtain the optimal order error estimate. We verify the efficiency and the accuracy of the mixed finite element scheme via numerical case studies and quantify the influence of the damping coefficient on the frequency and amplitude of the vibration.</p></abstract>

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Zhuang, Haixiong, Xiaojun Yang, and Zhenling Wu. "A Parameterization Scheme for Air–Sea Surface Interface Fluxes: Design and Stand-Alone Experiments." Journal of the Atmospheric Sciences 75, no. 7 (July 1, 2018): 2359–83. http://dx.doi.org/10.1175/jas-d-17-0384.1.

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Abstract Observations show that sea surface temperature (SST) can vary up to several degrees in a day and sea surface energy fluxes up to a few hundreds of watts per square meter. For synoptic- and subsynoptic-scale atmospheric modeling, there remains a need for the parameterization of air–sea surface interaction using simple schemes. In this paper, such a simple scheme, Atmosphere–Ocean Surface Interaction Scheme (AOSIS), is presented so that the short time variations in SST and energy fluxes can be estimated using a small number of atmospheric and oceanic bulk quantities. The scheme consists of three components: a two-layer ocean temperature model, a wind-wave model, and a surface flux model. Numerical experiments show that the scheme performs well in simulating SST and the air–sea exchanges. Relative to other schemes, AOSIS shows the following improvements: 1) it simulates SST and the cool-skin and warm-layer effect of the ocean mixed layer without the input of ocean bulk temperature of the mixed layer as a prior condition, which is required by most one-layer models; 2) the depth of the ocean mixed layer is allowed to vary according to surface wind stress and buoyancy flux; and 3) a method for computing ocean surface roughness length is proposed, which accounts for the aerodynamic effect of wind-generated waves. For experimental studies, AOSIS can be used in stand-alone mode for the calculation of SST through a small number of bulk measurements. AOSIS can also be used as an interface between the atmosphere and ocean models to be coupled together.

29

Jeong, H., and M. S. Kim. "Purification of entangled coherent states." Quantum Information and Computation 2, no. 3 (April 2002): 208–21. http://dx.doi.org/10.26421/qic2.3-4.

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We suggest an entanglement purification scheme for mixed entangled coherent states using 50-50 beam splitters and photodetectors. This scheme is directly applicable for mixed entangled coherent states of the Werner type, and can be useful for general mixed states using additional nonlinear interactions. We apply our scheme to entangled coherent states decohered in a vacuum environment and find the decay time until which they can be purified.

30

Gilquin, Hervé. "Glimm’s Scheme and Conservation Laws of Mixed Type." SIAM Journal on Scientific and Statistical Computing 10, no. 1 (January 1989): 133–53. http://dx.doi.org/10.1137/0910011.

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31

Kazemi, Mohammad, Khosrow Haj Sadeghi, and Shervin Shirmohammadi. "A Mixed Layer Multiple Description Video Coding Scheme." IEEE Transactions on Circuits and Systems for Video Technology 22, no. 2 (February 2012): 202–15. http://dx.doi.org/10.1109/tcsvt.2011.2159431.

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32

Shim, Kyung-Ah, Cheol-Min Park, and Namhun Koo. "Cryptanalysis of RGB, a mixed multivariate signature scheme." Finite Fields and Their Applications 45 (May 2017): 406–21. http://dx.doi.org/10.1016/j.ffa.2016.11.013.

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33

Hu, Hwai-Tsu, and Ling-Yuan Hsu. "A mixed modulation scheme for blind image watermarking." AEU - International Journal of Electronics and Communications 70, no. 2 (February 2016): 172–78. http://dx.doi.org/10.1016/j.aeue.2015.11.003.

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34

Duffin, Christian, and Nick Lipley. "Mixed response for scheme to ban violent patients." Emergency Nurse 9, no. 4 (July 2001): 4. http://dx.doi.org/10.7748/en.9.4.4.s5.

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35

Trouette, Benoît, Georges Halim Atallah, and Stéphane Vincent. "A Mixed Eulerian–Lagrangian scheme for scalar transport." Acta Mechanica 231, no. 9 (June 24, 2020): 3525–49. http://dx.doi.org/10.1007/s00707-020-02727-2.

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36

Nawaz, Yasir, Muhammad Shoaib Arif, and Kamaleldin Abodayeh. "A Compact Numerical Scheme for the Heat Transfer of Mixed Convection Flow in Quantum Calculus." Applied Sciences 12, no. 10 (May 13, 2022): 4959. http://dx.doi.org/10.3390/app12104959.

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This contribution aims to propose a compact numerical scheme to solve partial differential equations (PDEs) with q-spatial derivative terms. The numerical scheme is based on the q-Taylor series approach, and an operator is proposed, which is useful to discretize second-order spatial q-derivative terms. The compact numerical scheme is constructed using the proposed operator, which gives fourth-order accuracy for second-order q-derivative terms. For time discretization, Crank–Nicolson, and Runge–Kutta methods are applied. The stability for the scalar case and convergence conditions for the system of equations are provided. The mathematical model for the heat transfer of boundary layer flow under the effects of non-linear mixed convection is given in form of PDEs. The governing equations are transformed into dimensionless PDEs using suitable transformations. The velocity and temperature profiles with variations of mixed convection parameters and the Prandtl number are drawn graphically. From considered numerical experiments, it is pointed out that the proposed scheme in space and Crank–Nicolson in time is more effective than that in which discretization for the time derivative term is performed by applying the Runge–Kutta scheme. A comparison with existing schemes is carried out as part of the research. For future fluid-flow investigations in an enclosed industrial environment, the results presented in this study may serve as a useful guide.

37

Chen, Yifan, Yuliang Zhang, and Ziyuan Gu. "Differential Congestion Pricing Strategies for Heterogeneous Users in the Mixed Traffic Condition." Journal of Advanced Transportation 2022 (January 19, 2022): 1–14. http://dx.doi.org/10.1155/2022/1829104.

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Congestion pricing is one effective demand management strategy to alleviate traffic congestion. This work investigates pricing schemes for mixed traffic flow systems where the human-driven vehicles (HVs) and autonomous vehicles (AVs) coexist. The emerging and integration of autonomous vehicles can help improve the overall transportation efficiency and safety. Given the coexistence of HVs and AVs in the near future, there is need to adjust the existing traffic management strategies to adapt to the mixed traffic conditions. In this study, congestion pricing is imposed on the HVs and the AVs differently, that is, a distance-based toll to the HVs while a delay-based toll to the AVs. We consider six user groups based on the value of time (VOT) and the vehicle types. Compared with the unified distance-based toll, the advantage of delay-based toll is demonstrated first. Then, a surrogate-based optimization framework, namely the regressing Kriging (RK) model, is formulated. Three pricing schemes are investigated and compared: equity-oriented (EQ), environment friendliness-oriented (EN), and revenue-oriented (RE) schemes. Results show that the RE scheme collects the highest revenues; however, its cost-efficiency is weakened. The EQ scheme reduces the variance in the average travel costs among user groups, thus solving the equity issue.

38

Baird, Graham, and Endre Süli. "A finite volume scheme for the solution of a mixed discrete-continuous fragmentation model." ESAIM: Mathematical Modelling and Numerical Analysis 55, no. 3 (May 2021): 1067–101. http://dx.doi.org/10.1051/m2an/2020088.

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This paper concerns the construction and analysis of a numerical scheme for a mixed discrete-continuous fragmentation equation. A finite volume scheme is developed, based on a conservative formulation of a truncated version of the equations. The approximate solutions provided by this scheme are first shown to display conservation of mass and preservation of nonnegativity. Then, by utilising a Dunford–Pettis style argument, the sequence of approximate solutions generated is shown, under given restrictions on the model and the mesh, to converge (weakly) in an appropriate L1 space to a weak solution to the problem. By applying the methods and theory of operator semigroups, we are able to show that these weak solutions are unique and necessarily classical (differentiable) solutions, a degree of regularity not generally established when finite volume schemes are applied to such problems. Furthermore, this approach enabled us to derive a bound for the error induced by the truncation of the mass domain, and also establish the convergence of the truncated solutions as the truncation point is increased without bound. Finally, numerical simulations are performed to investigate the performance of the scheme and assess its rate of convergence as the mesh is refined, whilst also verifying the bound on the truncation error.

39

Abusabah, Ayman T., and Huseyin Arslan. "NOMA for Multinumerology OFDM Systems." Wireless Communications and Mobile Computing 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/8514314.

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Nonorthogonal multiple access (NOMA) is a promising technique which outperforms the traditional multiple access schemes in many aspects. It uses superposition coding (SC) to share the available resources among the users and adopts successive interference cancelation (SIC) for multiuser detection (MUD). Detection is performed in power domain where fairness can be supported through appropriate power allocation. Since power domain NOMA utilizes SC at the transmitter and SIC at the receiver, users cannot achieve equal rates and experience higher interference. In this paper, a novel NOMA scheme is proposed for multinumerology orthogonal frequency division multiplexing system, that is, different subcarrier spacings. The scheme uses the nature of mixed numerology systems to reduce the constraints associated with the MUD operation. This scheme not only enhances the fairness among the users but improves the bit error rate performance as well. Although the proposed scheme is less spectrally efficient than conventional NOMA schemes, it is still more spectrally efficient than orthogonal multiple access schemes.

40

Mohanty, Sanjit Ku, Debasish Das, and Rajani B. Dash. "Dual Mixed Gaussian Quadrature Based Adaptive Scheme for Analytic Functions." Annals of Pure and Applied Mathematics 22, no. 02 (2020): 83–92. http://dx.doi.org/10.22457/apam.v22n2a03704.

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An efficient adaptive scheme based on a dual mixed quadrature rule of precision eleven for approximate evaluation of line integral of analytic functions has been constructed. At first, the precision of Gauss-Legendre four point transformed rule is enhanced by using Richardson extrapolation. A suitable convex combination of the resulting rule and the Gauss-Legendre five point rule further enhances the precision producing a new mixed quadrature rule . This mixed rule is termed as dual mixed Gaussian quadrature rule as it acquires a very high precision eleven using Gaussian quadrature rule in two steps. An adaptive quadrature scheme is designed .Some test integrals having analytic function integrands have been evaluated using the dual mixed rule and its constituent rules in non- adaptive mode. The same set of test integrals have been evaluated using those rules as base rules in the adaptive scheme. The dual mixed rule based adaptive scheme is found to be most effective.

41

Zhang, Aoyu, Zhimin Han, Xiguang Wang, Randall Briggs, and Tianyu Xie. "Mixed control scheme for accurate control of robotic flexible endoscope." International Journal of Advanced Robotic Systems 14, no. 2 (March 1, 2017): 172988141770250. http://dx.doi.org/10.1177/1729881417702506.

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Tendon-driven endoscopes are mainly used in the current practice. Their flexible bodies may change frequently during the processes of biopsy, endoscopic mucosal resection or endoscopic submucosal dissection. These changes lead to backlash hysteresis and nonlinear friction effects, which make it difficult to achieve accurate control. To address this problem, a mixed control scheme based on the combination of discrete and continuous models was proposed and quantitatively compared with a conventional feedback control scheme, a feedforward control scheme and an adaptive control scheme. These experiments were conducted using a robotic gastroscope. The results showed that our control scheme can achieve more accurate tracking performance when the configuration changes frequently, with mean square error of tracking performance decreased by 50–75%.

42

Seleznev, I. V., E. V. Konopatskiy, and O. S. Voronova. "VARIATIVE GEOMETRIC ALGORITHMS FOR MODELING MULTIFACTOR PROCESSES." Construction and industrial safety, no. 21 (73) (2021): 135–45. http://dx.doi.org/10.37279/2413-1873-2021-21-135-145.

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The work is investigated by the influence of variable geometric algorithms in modeling multifactor processes using multidimensional interpolation. Geometric models of multifactorial processes obtained using multidimensional interpolation inherent variability, which is a consequence of the multiplicity of the choice of reference lines during the development of geometric modeling schemes. At the same time, all possible variations of geometric interpolyns are fully satisfying the initial data. It has been established that the number of variations of geometric schemes directly depends on the number of current parameters and the dimension of the space in which the simulated geometrical object is located. Thus, a variable approach to geometrical modeling of multifactor processes generates a number of scientific tasks, the main one is the need to determine the effect of the variability of geometric algorithms on the final results of the computational experiment and, as a result, the choice of the best modeling results. To this end, the article presents the studies of variable geometric algorithms and computational experiments on the example of 2-parametric geometric interpolyns. A classification of 2-parametric geometric interpolytesses, which were conditionally divided into 3 types. Depending on the geometric scheme of constructing interpolynta, the square geometric scheme, a rectangular geometric scheme, a mixed geometric scheme. As a result of computational experiments, it was found that for a square geometric scheme, the variability does not affect the final results, in rectangular geometric schemes, the variability has a slight influence, and mixed geometric schemes may have significant differences and require additional research to select the highest quality geometric process model. Comparison of geometric models were performed by the methods of scientific visualization by overlaying the response surfaces on each other.

43

Jeong, Jinsu, Sanguk Lee, and Rock-Hyun Baek. "Accurate Evaluation of Electro-Thermal Performance in Silicon Nanosheet Field-Effect Transistors with Schemes for Controlling Parasitic Bottom Transistors." Nanomaterials 14, no. 12 (June 10, 2024): 1006. http://dx.doi.org/10.3390/nano14121006.

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The electro-thermal performance of silicon nanosheet field-effect transistors (NSFETs) with various parasitic bottom transistor (trpbt)-controlling schemes is evaluated. Conventional punch-through stopper, trench inner-spacer (TIS), and bottom oxide (BOX) schemes were investigated from single-device to circuit-level evaluations to avoid overestimating heat’s impact on performance. For single-device evaluations, the TIS scheme maintains the device temperature 59.6 and 50.4 K lower than the BOX scheme for n/pFETs, respectively, due to the low thermal conductivity of BOX. However, when the over-etched S/D recess depth (TSD) exceeds 2 nm in the TIS scheme, the RC delay becomes larger than that of the BOX scheme due to increased gate capacitance (Cgg) as the TSD increases. A higher TIS height prevents the Cgg increase and exhibits the best electro-thermal performance at single-device operation. Circuit-level evaluations are conducted with ring oscillators using 3D mixed-mode simulation. Although TIS and BOX schemes have similar oscillation frequencies, the TIS scheme has a slightly lower device temperature. This thermal superiority of the TIS scheme becomes more pronounced as the load capacitance (CL) increases. As CL increases from 1 to 10 fF, the temperature difference between TIS and BOX schemes widens from 1.5 to 4.8 K. Therefore, the TIS scheme is most suitable for controlling trpbt and improving electro-thermal performance in sub-3 nm node NSFETs.

44

CHEN, WEI CHING, and JOHN YUAN. "SECURE COMMUNICATION BASED ON A HYBRID OF CHAOS AND ICA ENCRYPTIONS." International Journal of Modern Physics B 25, no. 02 (January 20, 2011): 255–64. http://dx.doi.org/10.1142/s0217979211056950.

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Chaos and independent component analysis (ICA) encryptions are two novel schemes for secure communications. In this paper, a new scheme combining chaos and ICA techniques is proposed to enhance the security level during communication. In this scheme, a master chaotic system is embedded at the transmitter. The message signal is mixed with a chaotic signal and a Gaussian white noise into two mixed signals and then transmitted to the receiver through the public channels. A signal for synchronization is transmitted through another public channel to the receiver where a slave chaotic system is embedded to reproduce the chaotic signal. A modified ICA is used to recover the message signal at the receiver. Since only two of the three transmitted signals contain the information of message signal, a hacker would not be able to retrieve the message signal by using ICA even though all the transmitted signals are intercepted. Spectrum analyses are used to prove that the message signal can be securely hidden under this scheme.

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Kawal, Kevin, Steven Blair, Qiteng Hong, and Panagiotis N. Papadopoulos. "Selective Auto-Reclosing of Mixed Circuits Based on Multi-Zone Differential Protection Principle and Distributed Sensing." Energies 16, no. 6 (March 8, 2023): 2558. http://dx.doi.org/10.3390/en16062558.

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Environmental concerns and economic constraints have led to increasing installations of mixed conductor circuits comprising underground cables (UGCs) and overhead transmission lines (OHLs). Faults on the OHL sections of such circuits are usually temporary, while there is a higher probability that faults on UGC sections are permanent. To maintain power system reliability and security, auto-reclose (AR) schemes are typically implemented to minimize outage duration after temporary OHL faults while blocking AR for UGC faults to prevent equipment damage. AR of a hybrid UCG–OHL transmission line, therefore, requires effective identification of the faulty section. However, the different electrical characteristics of UGC and OHL sections present significant challenges to existing protection and fault location methods. This paper presents a selective AR scheme for mixed conductor circuits based on the evaluation of differential currents in multiple defined protection zones, using distributed current transformer (CT) measurements provided by passive optical sensing. Case studies are conducted with a number of different UGC–OHL configurations, and the results demonstrate that the proposed scheme can accurately identify the faulty section, enabling effective selective AR of a comprehensive range of mixed conductor circuit topologies. The proposed scheme is also more cost effective, with reduced hardware requirements compared to conventional solutions. This paper thereby validates the optimal solution for mixed circuit protection as described in CIGRE Working Group B5.23 report 587.

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Coniglio, Michael C., James Correia, Patrick T. Marsh, and Fanyou Kong. "Verification of Convection-Allowing WRF Model Forecasts of the Planetary Boundary Layer Using Sounding Observations." Weather and Forecasting 28, no. 3 (June 1, 2013): 842–62. http://dx.doi.org/10.1175/waf-d-12-00103.1.

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Abstract This study evaluates forecasts of thermodynamic variables from five convection-allowing configurations of the Weather Research and Forecasting Model (WRF) with the Advanced Research core (WRF-ARW). The forecasts vary only in their planetary boundary layer (PBL) scheme, including three “local” schemes [Mellor–Yamada–Janjić (MYJ), quasi-normal scale elimination (QNSE), and Mellor–Yamada–Nakanishi–Niino (MYNN)] and two schemes that include “nonlocal” mixing [the asymmetric cloud model version 2 (ACM2) and the Yonei University (YSU) scheme]. The forecasts are compared to springtime radiosonde observations upstream from deep convection to gain a better understanding of the thermodynamic characteristics of these PBL schemes in this regime. The morning PBLs are all too cool and dry despite having little bias in PBL depth (except for YSU). In the evening, the local schemes produce shallower PBLs that are often too shallow and too moist compared to nonlocal schemes. However, MYNN is nearly unbiased in PBL depth, moisture, and potential temperature, which is comparable to the background North American Mesoscale model (NAM) forecasts. This result gives confidence in the use of the MYNN scheme in convection-allowing configurations of WRF-ARW to alleviate the typical cool, moist bias of the MYJ scheme in convective boundary layers upstream from convection. The morning cool and dry biases lead to an underprediction of mixed-layer CAPE (MLCAPE) and an overprediction of mixed-layer convective inhibition (MLCIN) at that time in all schemes. MLCAPE and MLCIN forecasts improve in the evening, with MYJ, QNSE, and MYNN having small mean errors, but ACM2 and YSU having a somewhat low bias. Strong observed capping inversions tend to be associated with an underprediction of MLCIN in the evening, as the model profiles are too smooth. MLCAPE tends to be overpredicted (underpredicted) by MYJ and QNSE (MYNN, ACM2, and YSU) when the observed MLCAPE is relatively small (large).

47

Lee, An Chen, Tzu Wei Kuo, and Zeng Lien Lee. "Modified Double EWMA Approach for Mixed Product Run-to-Run CMP Process Control." Advanced Materials Research 314-316 (August 2011): 2504–11. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.2504.

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Advanced process control (APC) has been recognized as a proper tool for maximizing profitability of semiconductor manufacturing facilities by improving efficiency and product quality. Run-to-run (RtR) process control with good quality and reliable performance for APC applications are most applicable. Chemical mechanical planarization (CMP) is part of critical processing module in semiconductor manufacturing. This paper proposes a new RtR control scheme, modified double EWMA controller (m-dEWMA), which is adaptive to the mixed product CMP processes. The m-dEWMA controller combined thread dEWMA with the drift compensation scheme to deal with the drift and shift disturbances caused by tool and products, respectively. Comparing recently mixed product control schemes: threaded EWMA controller, JADE control and threaded prediction correction controller (threaded PCC), the simulation results show that the m-dEWMA has better control performance than other controllers. The experiment results revealed that the m-dEWMA controller improves the wafer uniformity significantly in mixed product CMP process.

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Chen, Chien-Chang, Cheng-Shian Lin, and Jia-Zhan Chen. "Boolean-Based (k, n, m) Multi-Secret Image Sharing." Axioms 11, no. 5 (April 23, 2022): 197. http://dx.doi.org/10.3390/axioms11050197.

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Multi-secret image sharing technology shares multiple secret images among shared images for participants and the recovery requires enough shared images for fulfilling the security property. Simultaneously, the adopted Boolean method preserves high performance. The proposed (k, n, m) multi-secret image sharing scheme shares m secret images among n participants and gathering k participants’ shared images perfectly recovers these m secret images. The proposed scheme exhibits high performance because of the usage of Boolean-based processing. Moreover, the usage of a sharing matrix based strategy acquires perfect reconstruction of the secret images under (k, n) thresholds. Two proposed schemes, the source-random-mixed (SRM) and the source-random-separate (SRS) methods, are presented in this study from different strategies of sharing the random image mixed with the secret images or separated to the secret images, respectively. Moreover, the proposed SRS method exhibits the better sharing capacity. Experimental results show that the proposed schemes perform well on sharing efficiency and security.

49

Sablin, M. "An iterative method for solving difference problems of gas dynamics in the mixed Euler-Lagrangian variables." Journal of Physics: Conference Series 2099, no. 1 (November 1, 2021): 012013. http://dx.doi.org/10.1088/1742-6596/2099/1/012013.

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Abstract The method proposed is intended to solve implicit conservative operator difference schemes for a grid initial-boundary value problems on a simplex grid for a system of equations of gas dynamics in the mixed Euler-Lagrangian variables. To find a solution to such a scheme at a time step, it is represented as a single equation for a nonlinear function of two arguments from space – the direct product of the grid spaces of gas-dynamic quantities. To solve such an equation, a combination of the generalized Gauss-Seidel iterative method (external iterations) and an implicit two-layer iteration scheme (internal iterations at each external iteration) is used. The feature of the method is that, the equation, which is solved by internal iterations, is obtained from the equation of the difference scheme using symmetrization – such a non-degenerate linear transformation that the function in this equation has a self-adjoint positive Frechet derivative.

50

Liu, Pengfei, Liang Xiao, and Liancun Xiu. "Mixed Higher Order Variational Model for Image Recovery." Mathematical Problems in Engineering 2014 (2014): 1–15. http://dx.doi.org/10.1155/2014/924686.

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A novel mixed higher order regularizer involving the first and second degree image derivatives is proposed in this paper. Using spectral decomposition, we reformulate the new regularizer as a weightedL1-L2mixed norm of image derivatives. Due to the equivalent formulation of the proposed regularizer, an efficient fast projected gradient algorithm combined with monotone fast iterative shrinkage thresholding, called, FPG-MFISTA, is designed to solve the resulting variational image recovery problems under majorization-minimization framework. Finally, we demonstrate the effectiveness of the proposed regularization scheme by the experimental comparisons with total variation (TV) scheme, nonlocal TV scheme, and current second degree methods. Specifically, the proposed approach achieves better results than related state-of-the-art methods in terms of peak signal to ratio (PSNR) and restoration quality.

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