This letter proposes a reconfigurable microstrip patch antenna with polarization states being switched among linear (LP), left-hand (LH) and right-hand (RH) circular polarizations (CP). The CP waves are excited by two perturbation elements of loop slots in the ground plane. A p-i-n diode is placed on every slot to alter current direction, which determines state. influences diodes performance minimized because not patch. simulated measured results verified effectiveness proposed...

Collagen cross-linking is altered in many diseases of bone, and enzymatic collagen cross-links are important to bone quality, as evidenced by losses strength after lysyl oxidase inhibition (lathyrism). We hypothesized that also contribute directly fracture toughness. A mouse model lathyrism using subcutaneous injection up 500 mg/kg β-aminopropionitrile (BAPN) was developed characterized (60 animals across 4 dosage groups). Three weeks 150 or 350 BAPN treatment young, growing mice...

Abstract While obtaining high-resolution structural details from bone is highly important to better understand its mechanical strength and the effects of aging disease on ultrastructure, it has been a major challenge do so with existing biophysical techniques. Though solid-state NMR spectroscopy potential reveal bone, suffers poor spectral resolution sensitivity. Nonetheless, recent developments in magic angle spinning (MAS) technology have made possible spin solid samples up 110 kHz...

Lung EIT is a functional imaging method that utilizes electrical currents to reconstruct images of conductivity changes inside the thorax. This technique radiation free and applicable at bedside, but lacks spatial resolution compared morphological methods such as X-ray computed tomography (CT). In this article we describe an approach for image reconstruction using morphologic information obtained from other structural modalities. leads recon- structed lung ventilation can easily be...

<div class="section abstract"><div class="htmlview paragraph">Hydro-pneumatic suspension is widely used due to its favorable nonlinear stiffness and damping characteristics. However, with the presence of parameter uncertainties high nonlinearities in hydro-pneumatic system, effectiveness controller often suboptimal practical applications. To mitigate influence these issues on control performance, an adaptive sliding mode method expanded state observer (ESO) proposed. Firstly, a...

This paper describes the implementation of a new quantum-based system for generation 120 V RMS, 5 A sinusoidal, active, and reactive power over 50 to 400 Hz frequency range. The accurately relates spectral amplitudes phases voltage current waveforms generated programmable Josephson standard (PJVS) by using novel differential sampling technique. also employs amplifier that performs self-calibration corrections gain phase errors. Details design, measurement techniques, significant sources...

Supported Ni-based catalysts were easily sintered and deactivated in the dry re-forming of methane (DRM), resulting from a weak metal–support interaction. To solve this problem, series Mg-substituted hydroxyapatite (HAP) (Ni/MgxHAP, x = 0, 0.5, 1, 1.5) with 3% Ni loaded prepared by partial substitution Ca HAP Mg used for DRM. The results showed that presence influenced formation growth HAP, lattice distortion large number defects thus promoting entry into lattice, amount Ni2+[II] increased....

In this work, we propose a simple yet effective gradient projection algorithm for class of stochastic optimal control problems. We first reduce the problem to an optimization convex functional by means operator. Then convergent iterative scheme problem. The key issue in our is compute objective solving adjoint equations that are given backward differential (BSDEs). Euler method used solve resulting BSDEs. Rigorous convergence analysis presented, and it shown entire numerical admits order...

Scattering resonances have important applications in many areas of science and engineering. They are the replacement discrete spectral data for problems on non-compact domains. In this paper, we consider computation scattering defined exterior to a compact sound hard obstacle. The eigenvalues holomorphic Fredholm operator function. We truncate unbounded domain impose Dirichlet-to-Neumann (DtN) mapping. problem is then discretized using linear Lagrange element. Convergence proved abstract...

Electrical impedance tomography (EIT) reconstructs the conductivity distribution of a domain using electrical data on its boundary. This is an ill-posed inverse problem usually solved finite element mesh. For this article, special regularization method incorporating structural information targeted proposed and evaluated. Structural was obtained either from computed images or preliminary EIT reconstructions by modified k-means clustering. The integrates into reconstruction as soft constraint...

Chromium (Cr(VI)) is highly toxic and carcinogenic. Cr(VI) water pollution has become more serious. This article reports on a study in which lotus seed pods (LSP), an agricultural waste product, was used to efficiently remove from aqueous solution, the carbonization product of LSP after removal (CPLSP) can be regarded as resource containing Cr. removed by fits pseudo-second-order model. pH levels greatly influence amount Cr removed. The maximum solution 153.85 mg/g. possible mechanism...

Abstract The bearing is one of the most essential parts rotating machinery and equipment, accurate prediction remaining useful life (RUL) great engineering significance. This paper proposes a novel hybrid architecture called long short-term memory (LSTM) based on an attention mechanism combined with empirical wavelet transform (EWT) to improve accuracy RUL bearings. consists three parts: firstly, vibration signal stationarily processed into several intrinsic mode functions (IMFs) by EWT...

A novel compact reconfigurable microstrip antenna with agile polarization is proposed. Two small orthogonal notches near opposite angles of the square patch are cut. PIN diode placed on every notch and used as switch to change current distribution. By controlling two switches, can operate left-hand, right-hand linear polarizations. This designed, fabricated measured. Measured results better than simulated ones by HFSS. Experimental show that S11 less -10dB for circular both about 470MHz...