Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A stellarator systems/optimization code is used to optimize the ARIES-CS fusion power plant parameters for minimum cost of electricity subject to a large number of physics, engineering, and in-vessel component constraints for a compact stellarator configuration. Different physics models, reactor component models, and…
This letter presents the hybrid matrix method for stable analysis of electromagnetic wave propagation in stratified bianisotropic media. The method overcomes the numerical instability of transfer matrix and impedance matrix methods, even when the thickness tends to infinity or zero. The stability and accuracy of the h…
By using near-infrared surface-enhanced Raman scattering (SERS) with 60 nm gold nanoparticles (Au-NPs) to probe the chemical composition inside single human osteosarcoma cells we have shown that the SERS intensity may increase by a factor of 3-6 times in different parts of the cells depending on the density of gold na…
The flux-switching permanent magnet (FSPM) machine exhibits competitive torque capability and power density due to the high flux density. As a penalty, the cogging torque is relative large, resulting in unfavorable torque pulsation. Due to the simple and robust rotor construction, additional dummy slots are adopted to…
The electronic structure of two interfaces commonly found in dye-sensitized photovoltaic cells based on nanocrystalline anatase TiO2 (“Grätzel cells”) was investigated using photoemission spectroscopy (PES). X-ray photoemission spectroscopy (XPS) and ultraviolet photoemission spectroscopy (UPS) measurements were carri…
Over the years, the self-propagating high-temperature synthesis (SHS) has become an interesting research field to prepare a large numbers of advanced materials. Recently, the demands for high temperature advanced ceramics have further intensified the research on SHS for efficient material preparation. Several reviews,…
We determine the contributions to the joint density of states function attributable to the various types of optical transitions that occur within an amorphous semiconductor. We consider four types of optical transitions in this analysis: (1) those from the valence band extended electronic states to the conduction band…
A farinha de arroz tem sido um ingrediente atrativo para a indústria de extrusados, devido à suas qualidades como sabor suave, cor branca e hipoalergenicidade. Objetivou-se, neste trabalho, produzir e analisar farinha de arroz pré-gelatinizada (FPG) por extrusão termoplástica. As FPG foram produzidas num extrusor term…
This paper aims at optimal analysis and design of a three-phase line-start PMSM with simple structure, low cost and good performance. A prototype with 4 magnet poles is designed and manufactured. Simulation and experimental results are approximately the same and the prototype essentially satisfies the design request.…
In this work, we presented a spin-1 model to investigate the magnetic properties of noninteracting monodomain nanoparticles based on the pair approximation. Nearest-neighbor pair interactions are incorporated between the Ising spins in three parts that are core, core-surface, and surface within the nanoparticle. Using…
Lattice block structure panels with of a core separating two plates, both consisting of 3.2 mm diameter struts, were produced by investment casting of Ti-6Al-2Sn-4Zr-2Mo. Individual struts exhibit a microstructure and mechanical properties in compression and bending comparable to the bulk cast alloy. The panels show a…
A novel method for measurement and interpretation of PD phenomena in inverter-fed motors is discussed in this paper. The interpretation of PD measurements is carried out resorting to the direct-quadrature (dq) transform of the three voltages at motor terminals at the instant a PD event occurs. New tools (the dq loci,…
Power transformers are vital parts of electric energy transmission and generation systems. Numerous power transformers in the European power grid have reached an age of 30 years or even more and are possibly close to their end of life. Because of economic reasons it is demanded to keep current assets as long as possib…
ABSTRACT We present predictions and measurements of fatigue crack growth rates in plastically bent aluminium 2024‐T351 beams. Beam bending and fatigue were carefully controlled to minimize factors other than residual stress that could affect the fatigue crack growth rate, such as large plastic strains or residual stre…
This paper deals with different control strategies for DSTATCOM (Distribution Static Compensator) for power quality improvement for a three-phase, three-wire distribution system. A three-leg voltage source inverter (VSI) configuration with a dc bus capacitor is employed as DSTATCOM. The hysteresis as well as PWM curre…
Kurzfassung Der Sonderforschungsbereich 570 „Distortion Engineering – Verzugsbeherrschung in der Fertigung“ an der Universität Bremen hat sich als ein Ziel die Bestimmung signifikanter Einflussgrößen und Wechselwirkungen auf den Verzug über die gesamte Fertigungskette von ausgewählten Bauteilen gesetzt, um die wesentl…
Three types of starch hydrogels were prepared via the graft polymerization of acrylonitrile, AN, onto maize starch using ceric ammonium nitrate, CAN, as the initiator, followed by saponification with sodium hydroxide. The prepared hydrogel samples were characterized by estimating their nitrogen and carboxy group conte…
Mesenchymal stem cells (MSCs) are multipotent cells that differentiate into a variety of lineages including myocytes and vascular endothelial cells. However, little information is available regarding the therapeutic potential of MSCs in patients with atrioventricular block (AVB). We investigated whether local implanta…
Thermal barrier coatings (TBCs), which comprise metallic and ceramic multilayers, have been widely used in the hot section of aeroturbine engines to increase turbine efficiency and to extend the life of metallic components. An improvement in TBCs requires a better understanding of the complex changes in their structur…
A ZnO/SnS heterostructure was fabricated by electrodeposition. All the constituent elements of this heterostructure are inexpensive, abundant, and nontoxic, and electrodeposition is also an economic technique. Thus, electrodeposited ZnO/SnS is potentially very advantageous for solar cell production. Pulsed bias was ad…