Results 281 to 290 of about 19,319 (303)
Structural Concrete, EarlyView.Abstract This study examines the time‐dependent behavior of reinforced and prestressed concrete structures using integral‐ and rate‐type formulations, applying the concrete creep and steel relaxation models from the fib Model Code 2020. The stress–strain law for aging concrete is expressed by a second‐order differential equation, but a single rate‐type
Mauro Schulz
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Shear transfer model for ultra‐high‐performance concrete incorporating fiber bridging mechanism
Structural Concrete, EarlyView.Abstract Ultra‐high‐performance concrete (UHPC) exhibits exceptional mechanical properties, including high shear strength, partly attributed to the fiber bridging mechanism. However, existing shear transfer models for normal‐strength concrete have not considered the significant contribution of fibers.
Kefiyalew Zerfu +4 more
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Enhancing generalized spectral clustering with embedding Laplacian graph regularization
CAAI Transactions on Intelligence Technology, EarlyView.Abstract An enhanced generalised spectral clustering framework that addresses the limitations of existing methods by incorporating the Laplacian graph and group effect into a regularisation term is presented. By doing so, the framework significantly enhances discrimination power and proves highly effective in handling noisy data.
Hengmin Zhang +5 more
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Design of a Marker‐Based Human–Robot Following Motion Control Strategy
CAAI Transactions on Intelligence Technology, EarlyView.ABSTRACT To address the challenges of jerky movements and poor tracking performance in outdoor environments for a following‐type mobile robot, a novel marker‐based human–machine following‐motion control strategy is explored. This strategy decouples the control of linear velocity and angular velocity, handling them separately.
Zhigang Zhang +3 more
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Energy Internet, EarlyView.ABSTRACT The doubly fed induction generator (DFIG) shows multi‐time‐scale and strong nonlinearity, making its stability analysis difficult. This paper conducts small perturbation stability analysis for the single‐DFIG infinite‐bus system with additional inertia control (AIC). First, the full‐order electromagnetic transient model is constructed based on
Qi Guo +4 more
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High Voltage, EarlyView.Abstract This research introduces an equivalent circuit model and a computational method to address complex mechanical motion issues through electromechanical analogies. The study initially refines core vibration characteristics using single‐ and multi‐degree‐of‐freedom models, subsequently establishing equivalent circuit models for these various ...
Yunpeng Liu +6 more
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On the quaternionic Weyl algebra
Advances in Applied Clifford Algebras, 2001In this paper we introduce the notion of quaternionic Weyl algebraA 1(ℍ) and we study its main properties. We give some examples ofA 1(ℍ)-modules useful in the resolution of systems of differential equations whose linear differential operators are inA 1(ℍ). We also introduce a notion of Fourier transform that is an isomorphism ofA 1(ℍ).
SABADINI, IRENE MARIA, D. Struppa
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Journal of Mathematical Sciences, 1995 It is proved that the distributiveness of the right ideals lattice for a quaternion algebra over a commutative ring A is equivalent to the following property: the equation x2+y2+z2=0 is uniquely solvable in the field A/M for any maximal ideals M of A, the lattice of the ideals of A being distributive. Bibliography: 5 titles.
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