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A Novel Construction of Distribution Function through Second-Order Polynomial Approximation in Terms of Particle Mass, Momentum and Energy
(2024)Advances in Applied Mathematics and MechanicsIn this paper, we propose a new way to construct the distribution function through the second-order polynomial approximation in terms of particle mass, momentum and energy. The new construction holds three distinguished features. First, the formulations are more concise as compared with the third-order truncated Hermite polynomial expansion which yields Grad's 13-moment distribution function; Second, all moments of the present distribution ...Journal Article -
Fabrication Procedures and Mechanical Supports of No-Insulation All-GdBCO Double Pancake Magnets in Liquid Helium
(2024)IEEE Transactions on Applied SuperconductivityThe no-insulation (NI) high-temperature superconductor (HTS) winding technique enables the fabrication of highly compact magnets with self-quench protection. NI pancake coils are implemented to develop a 28-T HTS magnet for the operation of a 792-GHz gyrotron, which is a microwave source for dynamic nuclear polarization nuclear magnetic resonance. To this end, three NI all-GdBCO double pancake (DP) magnets were fabricated using different ...Journal Article -
Nonlinearity enhanced mode localization in two coupled MEMS resonators
(2024)International Journal of Mechanical SciencesAs an intriguing phenomenon in coupled dynamic systems, mode localization has garnered considerable attention in areas such as vibration control, sensing, etc. This paper investigates mode localization in two coupled MEMS resonators in both linear and nonlinear cases through experimental and theoretical analyses. The relationship of amplitude variation or energy transfer between two resonators in mode localization is unveiled. Subsequently, ...Journal Article -
More realistic planetesimal masses alter Kuiper belt formation models and add stochasticity
(2024)IcarusMuch of the modern Kuiper belt is thought to be the result of Neptune's migration through a primordial belt of planetesimals, possibly interrupted by an instability amongst the giant planets. While most prior work has employed massless test particles to study this Kuiper belt formation process, we perform simulations here that include the gravitational effects of the primordial planetesimal belt consisting of ∼105 massive bodies. In our ...Journal Article -
Demonstration of a successful soft chemical stimulation in a geothermal sandstone reservoir in Mezőberény (Hungary)
(2024)GeothermicsGeothermal energy projects often lack sufficient permeability for a sustainable operation. If natural permeability is low, it can be enhanced by stimulation treatments. These can be of thermal, hydraulic or chemical nature. The challenge is to stimulate the reservoir successfully and at the same time to do it in an environmentally safe way. This is called soft stimulation and was extensively tested in the context of the EU-Horizon2020 ...Journal Article -
A branch-and-cut approach to solve the Fault Diagnosis Problem with Lazy Spread and imperfect system information
(2024)Computers & Operations ResearchThis paper presents a new approach to solving the Fault Diagnosis Problem with Lazy Spread (FDPL) that arises in many fault-tolerant real-world systems with few opportunities for maintenance during their operations and significant failure interactions between the subsystems/components. As opposed to cascading faults that spread to most of the system almost instantaneously, FDPL considers fault-resistant systems where the spread of failures ...Journal Article -
Molecular dynamics investigation of gold nanoparticle coalescence under realistic gas-phase synthesis conditions
(2024)Journal of Aerosol ScienceDependence of nanoparticle (NP) coalescence on various physical parameters (e.g., temperature, number of NPs, NP size, orientation, crystallinity, shape, or composition, etc.) is a very active field of investigation. However, most computational studies on NP coalescence to date are performed in vacuum, with only a handful of studies taking gas pressure into account and even fewer doing a systematic analysis. This is due to two reasons: ...Journal Article -
Lifted algorithms for symmetric weighted first-order model sampling
(2024)Artificial IntelligenceWeighted model counting (WMC) is the task of computing the weighted sum of all satisfying assignments (i.e., models) of a propositional formula. Similarly, weighted model sampling (WMS) aims to randomly generate models with probability proportional to their respective weights. Both WMC and WMS are hard to solve exactly, falling under the #P-hard complexity class. However, it is known that the counting problem may sometimes be tractable, ...Journal Article -
HazardNet: A thermal hazard prediction framework for datacenters
(2024)Future Generation Computer SystemsModern scientific discoveries rely on an insatiable demand for computational resources. To meet this ever-growing computing demand, the datacenters have been established, which are complex controlled environments that host thousands of computing nodes, storage, high-performance communication networks, cooling systems, etc. A datacenter consumes a large amount of electrical power (in the range of megawatts), which gets completely transformed ...Journal Article -
Experimental characterization of a polydicyclopentadiene thermoset, study of protective metal-polymer and polymer-metal two-layer structures
(2024)Materials LettersMultilayer structures are frequently used for military impact protection applications. For low-velocity impacts, they can be made from a wide variety of materials, including metallic and polymeric materials. One proposes to investigate the impact resistance of two-layer structures composed of polydicyclopentadiene thermosetting resin (P-DCPD) combined with DP450 steel or AA2024-T3 aluminum. Structures are subjected to debris impacts of ...Journal Article