In this paper, we propose a novel ranking scheme named Affinity Ranking (AR) to re-rank search results by optimizing two metrics: (1) diversity -- which indicates the variance of topics in group documents; (2) information richness measures coverage single document its topic. Both metrics are calculated from directed link graph Graph (AG). AG models structure documents based on asymmetric content similarities between each pair documents. Experimental Yahoo! Directory, ODP Data, and Newsgroup...

For 304L large structural parts used in nuclear power, it is hard and costly to fabricate machine traditionally. Wire arc additive manufacturing (WAAM) has low cost high material utilization, which provides an efficient way the parts. So this study, WAAM of stainless steel. Through tensile test metallographic analysis, mechanical properties microstructure steel fabricated by were explored. The results indicate that with layers depositing, cooling rate becomes slower, dendrites become thicker...

Coarse grains and gas pores are two main problems that limit the application of additive manufacturing aluminum alloys. To reduce porosity refine grains, this paper presents a quantitative investigation into effect pulse frequency arc current on Al–5Si alloy. The experiment results show have significant impact macrostructure, microstructure, porosity, tensile properties samples. Fine uniform microstructure can be obtained with low as result rapid cooling molten pool. With increase frequency,...

Organic solid-state scintillating materials have attracted wide attention due to their irreplaceable advantages such as low cost, easy production, flexibility, and adjustable luminescence performance. Recently, various organic based solid-state...

Wire feeding additive manufacturing (WFAM) has broad application prospects because of its advantages low cost and high efficiency. However, with the mode lateral wire feeding, including laser manufacturing, gas tungsten arc etc., it is easy to generate macro defects on surface components anisotropy melted wire, which limits promotion WFAM. In this work, proposed investigate mechanisms defects. The results illustrate that defect forms mainly include side spatters, collapse, poor flatness,...

Streptococcus mutans (S. mutans) is considered the primary bacteria responsible for dental caries, and specific recognition fluorescence labeling can achieve accurate detection early diagnosis of oral diseases such as caries. However, due to weak stability traditional imaging probes in solution a lack functions, there are still significant challenges fluorescent caries lesions. Herein, we report peptide-QDs composite probe that high-performance S. enable susceptible sites hidden carious...

Active site exposure and intrinsic catalytic performance are considered important aspects of oxygen evolution reaction catalyst design. In this work, the coordination capacity tributylphosphine is utilized to construct cationic vacancy defects on NiFe-LDH nanosheets. As-prepared defective nanosheets show not only optimization ability active but also improved by construction defect tune local electronic structure. The x-ray photoelectron spectroscopy results revealed that after reconstruction...

Hybrid plasmonic Au/ZnSe nanodumbbell heterostructures prevent the contact of hot electrons with surrounding medium, resulting in higher PT conversion efficiency.

It is believed that a RSAT™ (Regenerable Solvent Absorption Technology) process the most viable nearterm technology for post-combustion CO2 capture from power plant flue gas. The Babcock & Wilcox Power Generation Group, Inc. (B&W) has deployed suite of research tools to evaluate and develop scrubbing technology, including laboratory, pilot-scale, simulation modeling capabilities. Since construction operation test facilities require significant resources, it essential effectively utilize...

<div class="section abstract"><div class="htmlview paragraph">Typically, modern automotive engine designs include separate cylinder heads and blocks utilize a multilayer steel head gasket (MLS) to seal the resulting joint. Cylinder bolts are used hold joint together non-linear properties of provide capability movement within joint, which is essential for durability performance.</div><div paragraph">The current design mainly evaluates sealing performance in hot cold...

Colloidal quantum dots (QDs) have exceptional fluorescence properties. Overcoming aggregation-induced quenching and enhancing the of colloidal QDs remained a challenging issue in this field. In study, composite hollow nanospheres composed Au nanoparticles (NPs) CdS:Ag-doped were successfully constructed through controlled microemulsion-based cooperative assembly. This method harnessed localized surface plasmon resonance (LSPR) effect NPs nearby doped QDs, resulting enhanced QD observation...

Core–shell nanocrystals (C–S NCs) are an essential class of materials whose structural engineering has attracted wide attention due to their tunable optical and electrical properties, especially noble metal@semiconductor (NMS) C–S NCs with flexible plasmon-exciton coupling. Due diverse critical applications, aqueous biological herein we propose topological strategy enabled by cation exchange reactions (CER) synthesize various plasmonic Au@semiconductor NCs, in which environmentally friendly...

ZigBee is a new close-up, low-complexity, low-power, low data rate, low-cost wireless networking technology, mainly used for short distance transmission. It based on IEEE802.15.4 standards, thousands of tiny sensors form network through mutual coordination to communications. This paper introduces the sensor networks in environmental monitoring applications. The hardware design, including microprocessor, acquisition, antenna and peripheral circuits chips, software design composed mesh that...

The effect of heat treatment on microstructures and stress rupture property a Ni3Al base single crystal alloy DDIC6 was studied in the present investigate. specimens were produced by screw selection method. for 1300°C/10h+1120°C/4h+870°C/32h 1300°C/10h+870°C/32h.The examined SEM, TEM X-ray EDS techniques. tests carried out air constant load creep machines under 1100°C/130MPa with size φ5×25 mm. experimental results showed that as-cast large γ′ phases entirely dissolved after 1300°C/10h,...

In this paper, we develop a new Medium Access Control (MAC) protocol that based on hybrid FDMA/TDMA technology with three-jump network. This combines the advantages of both FDMA and TDMA. The communication cluster heads is which can decrease crosstalk between different frequency identify each other easily; inter TDMA to achieve basic time synchronization. Then synchronization network was obtained. At same time, increased range system reduced power. adopts head rotation mechanism. TH-MAC has...

Photodynamic therapy (PDT) and immunotherapy are two promising weapons against systemic multidrug-resistant (MDR) bacterial infection. However, low productivity of reactive oxygen species (ROS) genetic diversity germs hinder the generation enough antigens from combating problem. Here, we creatively synthesized plasmonic Au@CdSe x S 1-x yolk-shell nanostructrues with Ag doping (ACSS Y-S), which triggers enhanced PDT under NIR light. The Au nanorods (NRs) utilize laser to generate...