The extensive applications of graphene oxide (GO) inevitably lead to entry into the natural aquatic environment. However, information on its toxicity emergent plants is still lacking. In this study, an plant, Iris pseudacorus, was exposed GO (1, 20, 80, and 140 mg·L-1) under hydroponic conditions for 15 weeks. Changes in plant growth were assessed by analyzing biomass photosynthetic pigment contents; photosynthesis response verified measuring chlorophyll a fluorescence; nutrient levels...

This letter aims to overcome the challenges faced by Physics-Informed Neural Networks (PINNs) in metal structure design. Taking design of horn antennas as an example, we propose a knowledge-embedded PINNs (KE-PINNs) inverse framework. Normalized Maxwell's equations are employed address convergence issues caused differences magnitudes. Unlike traditional PINNs, built field component neural networks, inherently satisfying boundary conditions structure. At same time, port and aperture fields...

Using physics-informed neural networks to solve physical inverse problems is becoming a trend. However, it difficult the scheme that only introduces knowledge through loss function. Constructing reasonable function make results converge becomes challenge. To address challenge of network models for design electromagnetic devices, deep introduced by using mode matching method. The equations have been integrated into structure when constructed. This feature makes more concise and higher...

Intra-vehicle wireless communication applications, e.g. the sensor network, are in need of antennas with uniformly radiated power for signal transmitting and receiving their randomly distributed neighboring targets. This demand can be met quasi-isotropic low angular gain variation (GV). In this paper, two types practical implementation conventional U-shaped λ/4 resonators, which supposed to have theoretically ideal (approaching zero) GV but intrinsically radiation resistance, been proposed....

At present, researchers generally believe that the change of maximum directivity planar phased arrays in beam scanning process conforms with cosine law, so wide-range from broadside to end-fire is impossible realize. There are three main factors affect range array antenna: 1) factor; 2) element pattern; 3) port impedance matching. Scholars have done a lot researches on pattern and About factor, Elliott, famous scholar, made theoretical study linear 1963 1964, concluding variation law....

This letter focuses on the important challenge of realizing superdirectivity at large scanning angles (achieving flatness scanning) from perspective array factor. Upon analysing derivation factor theory, this determines that directivity planar arrays drops as cosine angle ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">the law</i> ) is result an approximate derivation. indicates aperture field can exhibit angles. Subsequently, we employed...

In this communication, we propose an inverse design method based on spectral analysis (IDMBSA) for achieving desired far-field radiation pattern through aperture field design. The obtained IDMBSA can be utilized array synthesis and sparse design, it also serve as a objective existing implementation methods. combined with the coordinate transformation enables fulfillment of requirements arbitrary phaseless polarization needs. Non-linearity introduced by is addressed multi-objective...

A highly efficient and economic method for the simultaneous determination of six common antibiotics (two tetracyclines, two quinolones, sulfonamides) in chicken manure was developed by using solid-phase extraction high performance liquid chromatography (SPE-HPLC). The samples were extracted a mixture EDTA-McIlvaine buffer mixed organic extractant (methanol-acetonitrile-acetone, 2:2:1, v/v/v), cleaned hydrophile-lipophile balance (HLB) cartridge, eluted methanol-dichloromethane (7:3, v/v),...

This conference paper presents the physical implementation of inverse design method based on spectral analysis starting from phaseless radiation pattern, utilizing a meta-only transmitarray antenna (MOTA). Specifically, aperture field designed by was achieved MOTA which is composed metal-only unit cells (MOUCs) whose transmission magnitude and phase can be independently adjusted varying their dimensions. The simulation results are in good agreement with expectations, confirming correctness...

At present, there are many kinds of gas pipeline leak detection methods at home and abroad. In this paper, combined with the actuality in China experience international practice computer automation instrumentations, real-time monitoring model long distance natural was researched. order to adapt needs simulation, under strictly meeting stability requirements characteristic line, premise grid layout form line changed, solution transformed equations given. Leakage point amount leakage were...

The effect of attapulgite (magnesium aluminium phyllosilicate) and its modified materials on the extractability soil Cd accumulation in lettuce (

A time-reversal (TR) multi-channel transmission approach with only one receiving antenna is theoretically proposed, numerically analyzed, and experimentally demonstrated in this paper. By using a single parallel or serial constructed post-channel circuits, information can be received independently from each channel the proposed TR system. The simulated experimented results show that system has similar performance to traditional multiple antennas. used high-capacity communication systems.

With the integration of electromagnetic devices, modules that make up into devices and functions needed to achieve are becoming more diverse. The coupling between is difficult ignore, difficulty in designing increases sharply, traditional design methods gradually become incompetent. It urgent find a new comprehensive method. This paper use spatiotemporally synchronous focusing characteristics time-reversed waves explore possibility applying time-reversal technique device design. First, based...

Existing electromagnetic inverse design methods are often established in the spacial domain. This communication presents an method, which can aperture field for desired phaseless radiation pattern, from spectral domain perspective. In addition, it naturally adapts to polarization constraint. Specifically, be converted into solving first kind of Fredholm integral equation, using method. To deal with ill-posedness such we apply modal expansion integrand. cope non-linearity introduced by...

Abstract Herbicide atrazine (ATZ) has a detrimental effect on health of aquatic ecosystems, and become global concern in recent years. but understanding its persistence potential toxicity under combined pollution, especially the coexistence other emerging pollutants, remains limited. In this work, dissipation transformation ATZ combination with graphene oxide (GO) water were investigated. Results showed that rates dramatically increased by 15%-95% half-lives shortened 15%-40% depending...