Hydrogen sulfide (H2S) is closely related to physiological diseases, environmental pollution, food safety, and plant growth. Herein, a new nopinone-based near-infrared fluorescent probe has been developed detect H2S with superior performance, including large Stokes shift, low detection limit, good selectivity, fast response time. NPD-H2S was used in water wine samples quantitatively. In addition, could be fabricate nanofiber membranes as portable tool for sensitively detecting vapor using...

With the continuous development of economic strength and science technology, construction Intelligent Transportation System(ITS) has become a new direction in many cities. A complete accurate traffic dataset can improve accuracy prediction promote ITS Most existing datasets are collected on highways, they only one-way road data. There is little analysis impact weather prediction, more auxiliary information lacking at same time. The use such for experiments lead to inaccurate unconvincing...

Multipopulation differential evolution combined with opposition-based learning is developed to improve the convergence efficiency and optimization accuracy for heat exchanger network synthesis. The algorithm based on a stagewise superstructure simultaneous model without considering stream splitting. candidate population its opposite are searched in parallel. Mutation operations implemented both populations provide full information exchange among at each generation. A regrouping schedule...

Parameter setting effecting on solving efficiency is problematic and challenge of heuristic algorithm in engineering optimization. To reinforce the optimization, self-adaptation strategy optical absorption coefficient based dynamical spatial distribution individual information provided for parameter adjustment Polymorphic firefly algorithm. This method utilized to test calculate three different scale heat exchanger network examples public literature. More economic networks lower total...

Accurate localization of mobile nodes has been an important and fundamental problem in underwater acoustic sensor networks (UASNs). The detection information returned from a node is meaningful only if its location known. In this paper, we propose two algorithms based on color filtering technology called PCFL ACFL. ACFL aim at collaboratively accomplishing accurate with minimum energy expenditure. They both adopt the overlapping signal region task anchors which can communicate directly as...

Localization problem is a hot topic in the field of wireless sensor networks. The distance vector-hop (DV-Hop) typical range-free localization algorithm which widely used many applications owing to its advantages such as simplicity, feasibility, low cost, and less hardware requirements. However, error relatively large. In this article, novel approach designated CWDV-Hop was presented improve accuracy. first step CWDV-Hop, distance-weighted hop calculated by introducing new defined factor...

The catalytic removal of methane (CH4) in exhaust emissions natural gas-fueled vehicles is still a major challenge for automotive manufacturers because the high CH3-H bond energy and concentrations water (H2O). Density functional theory (DFT) calculations were employed to investigate adsorption CH4 H2O, as well activation CH4, on surface Pd-Pt bimetal supported by γ-Al2O3. These are significant factors combustion. Pt addition weakened bonding intermediates increased availability electrons...

We present a neural radiance field method for urban-scale semantic and building-level instance segmentation from aerial images by lifting noisy 2D labels to 3D. This is challenging problem due two primary reasons. Firstly, objects in urban exhibit substantial variations size, including buildings, cars, roads, which pose significant challenge accurate segmentation. Secondly, the generated existing methods suffer multi-view inconsistency problem, especially case of images, where each image...

High-Q micro-beam resonators have been widely applied in communication fields such as narrowband filters, but thermoelastic damping restricts the further improvement of quality factor. Traditional method overall size optimization used for factor (QTED) will cause resonant frequency resonator change greatly, which not be allowed filters. In this article, three slots are introduced into a beam to greatly reduce by rationally arranging length ratio central slot and side slot, while is basically...

To investigate the creep mechanical characteristics of rocks in different saturated states after freeze-thaw cycles, samples with saturations (30%, 50%, 70%, 90%, and 100%) were selected for nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), uniaxial compression tests. The internal microscopic damage rock sample under long-term loading are analyzed action cycles. test results show that, as saturation increases, T2 spectrum distribution shifts to right. area gradually...

In wireless sensor networks, the localization space can be divided into distinct regions that each uniquely identified by sequences in traditional sequence-based (SBL). The represent ranking of distances from reference nodes to region. But average estimate error for locations a face region is quite evidence. For problem location error, new technique which an improvement SBL proposed here. It uses triangular area enclosed centroids three "nearest" exclude areas unknown do not exist, so it...

This paper presents the on-site monitoring of a medium–long highway tunnel constructed above goaf multi-layer coal seam, in order to evaluate and maintain safety during operation. The case study Tianzimiao Shanxi province was conducted seam with typical geological engineering conditions China, where total four seams (seam no. 3, 8, 12, 15) were mined out thickness up 11 m. Methods including data collection, survey, drilling, geophysical prospecting, testing, adopted, geo-mechanical model...

Abstract In this paper,the influence of different Zr addition amounts on the microstructure and tensile properties A356 alloy modified by 0.3 wt%Yb in cast state T6 heat-treated were systematically investigated. The results show that adding basis can further refine α -Al eutectic Si branches. When content is 0.25 wt%, has smallest grain size 133 μ m, aspect ratio 1.6. However, excessive will weaken effect Yb make start coarsening. forms (Al,Si) 3 (Zr,Ti) phase with Ti alloy, provides...