524 research outputs found
A Stochastic Generalized Ginzburg-Landau Equation Driven by Jump Noise
This paper is concerned with the stochastic generalized Ginzburg-Landau
equation driven by a multiplicative noise of jump type. By a prior estimate,
weak convergence and monotonicity technique, we prove the existence and
uniqueness of the solution of an initial-boundary value problem with
homogeneous Dirichlet boundary condition. However, for the generalized
Ginzburg-Landau equation, such a locally monotonic condition of the nonlinear
term can not be satisfied in a straight way. For this, we utilize the
characteristic structure of nonlinear term and refined analysis to overcome
this gap
Asymptotic Dynamical Difference between the Nonlocal and Local Swift-Hohenberg Models
In this paper the difference in the asymptotic dynamics between the nonlocal
and local two-dimensional Swift-Hohenberg models is investigated. It is shown
that the bounds for the dimensions of the global attractors for the nonlocal
and local Swift-Hohenberg models differ by an absolute constant, which depends
only on the Rayleigh number, and upper and lower bounds of the kernel of the
nonlocal nonlinearity. Even when this kernel of the nonlocal operator is a
constant function, the dimension bounds of the global attractors still differ
by an absolute constant depending on the Rayleigh number.Comment: 13 pages, LaTex fil
Depth and Breadth of Research Area Coverage and Its Impact on Publication Citation: An Analysis of Bibliometric Papers
Many other factors affecting citation of publications, except for research
area coverage, have been studied. This study aims to investigate impact of
research area coverage. Bibliometric papers and their related papers (referred
papers, citing papers and first author's papers) were screened and matched by
Python program. Papers' research areas were classified according to Web of
Science. Bibliometric parameters of the most cited 5% and the least cited 5%
papers were compared. Firstly, coverage of related papers' research areas
impacts the citation of their original papers. The impact of references and
citing papers are positive and negative, separately, while the first author's
papers have no influence. Secondly, high-influence papers tend to cite
references from a wider area and are cited by followers from a wider area.
Additionally, the pattern of knowledge flow differs significantly between high-
and low-influence papers. Low-influence papers narrow knowledge flow, whereas
high-influence papers broaden it. This study has shown that both depth and
breadth of research area coverage can influence citations. It is recommended
that authors should extensively cite high-influence publications, both within
and beyond their own area
Visualization of Tomato Growth Based on Dry Matter Flow
The visualization of tomato growth can be used in 3D computer games and virtual gardens. Based on the growth theory involving the respiration theory, the photosynthesis, and dry matter partition, a visual system is developed. The tomato growth visual simulation system is light-and-temperature-dependent and shows plausible visual effects in consideration of the continuous growth, texture map, gravity influence, and collision detection. In addition, the virtual tomato plant information, such as the plant height, leaf area index, fruit weight, and dry matter, can be updated and output in real time
An approach to multiple attribute decision making based on the induced Choquet integral with fuzzy number intuitionistic fuzzy information
In this paper, we investigate the multiple attribute decision making problems with fuzzy number intuitionistic fuzzy information. Firstly, some operational laws of fuzzy number intuitionistic fuzzy values, score function and accuracy function of fuzzy number intuitionistic fuzzy values are introduced. Then, we have developed two fuzzy number intuitionistic fuzzy Choquet integral aggregation operators: induced fuzzy number intuitionistic fuzzy choquet ordered averaging (IFNIFCOA) operator and induced fuzzy number intuitionistic fuzzy choquet ordered geometric (IFNIFCOG) operator. The prominent characteristic of the operators is that they can not only consider the importance of the elements or their ordered positions, but also reflect the correlation among the elements or their ordered positions. We have studied some desirable properties of the IFNIFCOA and IFNIFCOG operators, such as commutativity, idempotency and monotonicity, and applied the IFNIFCOA and IFNIFCOGM operators to multiple attribute decision making with fuzzy number intuitionistic fuzzy information. Finally an illustrative example has been given to show the developed method
Analytical and computational method of structure-borne noise and shock resistance of gear system
An approach to synthetically evaluate structure-borne noise and shock resistance of gear system is proposed. Firstly, dynamic finite element mesh model of gear system which includes shafts, bearings, gears and housing is established by using spring element, tetrahedral element and hexahedral element. Then dynamic finite element analysis model of gear system is gotten by loading the dynamic excitation force which can be calculated via the computation program of gear pair stiffness excitation, error excitation and impact excitation onto the tooth meshing line as boundary conditions. And the dynamic response of gear system is analyzed by using modal superposition method, and the vibration response experimental study of gear system is performed on the gearbox test-bed. The comparative analysis shows that computational results of the vibration response are in good agreement with the data of experiment tests and it could verify the rationality of dynamic finite element mesh model of gear system. Finally, taking acceleration shock excitation load into account on the basis of the dynamic finite element mesh model, the impact response of gear system is solved, and the shock resistance is analyzed based on the strength decision criterion
Moir\'e Magnetic Exchange Interactions in Twisted Magnets
Besides moir\'e superlattice, twisting can also generate moir\'e magnetic
exchange interactions (MMEIs) in van der Waals magnets. However, due to the
extreme complexity and twist-angle-dependent sensitivity, all existing models
fail to capture the MMEIs, preventing the understanding of MMEIs-induced new
physics. Here, we develop a microscopic moir\'e spin Hamiltonian that enables
the effective description of MMEIs via a sliding-mapping approach in twisted
magnets, as demonstrated in twisted bilayer CrI3. Unexpectedly, we discover
that the emergence of MMEIs can create an unprecedented magnetic skyrmion
bubble (SkB) with non-conversed helicity, named as moir\'e-type SkB,
representing a unique spin texture solely generated by MMEIs and ready to be
detected under the current experimental conditions. Importantly, the size and
population of SkBs can be finely controlled by twist angle, a key step for
skyrmion-based quantum computing and information storage. Furthermore, we
reveal that the MMEIs can be effectively manipulated by the substrate-induced
interfacial Dzyaloshinskii-Moriya interaction, modulating the
twist-angle-dependent magnetic phase diagram, which solves the outstanding
disagreements between prior theories and experiments and verifies our theory.Comment: 17 pages, 5 figure
A novel gas ionization sensor using Pd nanoparticle-capped ZnO
A novel gas ionization sensor using Pd nanoparticle-capped ZnO (Pd/ZnO) nanorods as the anode is proposed. The Pd/ZnO nanorod-based sensors, compared with the bare ZnO nanorod, show lower breakdown voltage for the detected gases with good sensitivity and selectivity. Moreover, the sensors exhibit stable performance after more than 200 tests for both inert and active gases. The simple, low-cost, Pd/ZnO nanorod-based field-ionization gas sensors presented in this study have potential applications in the field of gas sensor devices
4-(2-ChloroÂethoxy)phthalonitrile
In the title compound, C10H7ClN2O, the O and both C atoms of the chloroethoxy group are disordered over two positions, the occupancy factor of the major disorder component refining to 0.54 (2)
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