TBAI could catalyze the direct oxidative C–N coupling of 2-aminopyridines with β-keto esters and 1,3-diones, which affords imidazo[1,2-a]pyridines as products. The reaction was realized under metal-free conditions by using tert-butyl hydroperoxide (TBHP) oxidant.

Perceptual quality assessment of the videos acquired in wilds is vital importance for assurance video services. The inaccessibility reference with pristine and complexity authentic distortions pose great challenges this kind blind (BVQA) task. Although model-based transfer learning an effective efficient paradigm BVQA task, it remains to be a challenge explore <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">what</i>...

Stem cell therapy has shown therapeutic benefit in dilated cardiomyopathy (DCM), but doubt remains about the most appropriate stem subpopulation. The current study compared efficacy of intracoronary administration bone marrow mononuclear cells (BMMC) or mesenchymal (BMSC) patients with DCM.

The ultra-high frequency (UHF) partial discharge (PD) monitoring is one of the most effective ways to detect insulation failure in electrical equipment. Although UHF method avoids intensive low-frequency noise, various electromagnetic interferences substation can still influence its effectiveness and reliability. Most existing denoising algorithms, however, are unable suppress different kinds noise simultaneously. Meanwhile, main focus these algorithms on degree reduction, while pay little...

Partial discharge (PD) detection and recognition are of great significance to the condition monitoring gas-insulated switchgear (GIS). In current work, ultra-high-frequency (UHF) signals induced by PD pulses measured used represent source. For classification, feature parameters need be extracted from UHF signals. Therefore, this study proposes a new extraction method that is based on S-transform (ST) singular value decomposition (SVD). generated four kinds artificial defects collected...

Since the Ukraine blackout in 2015, coordinated cyber-physical attacks (CCPAs) have been emerging and are used to mask line outages smart grid. In this paper, we investigate features of CCPAs constitute mathematic formulation with respect topologies electric parameters a power grid before after attacks. With objective maximizing number overloaded lines, bilevel programming model is developed describe interaction between adversary control center. The most damaging CCPA can be determined by...

Reasonable repair crew dispatch can accelerate the service restoration in distribution systems after some components are damaged. It is worthy noting that as traditional involving into cyber-physical composed of physical networks and cyber networks, damaged these two should be coordinately repaired to achieve maximal performance. However, crews scheduled without considering impact corresponding existing strategies. In this paper, a coordinated model proposed co-optimize schedule networks....

As one of the most important mesoscopic properties networks, community structure plays an role in cascading failures on isolated networks. However, study for understanding influences interdependent scale-free networks remains missing. In this paper, we investigate modular under inner attacks and hub from global local perspective. We mainly analyse inter-community connections coupling preferences, i.e. random communities (RCIC), assortative (ACIC) with (ACWC). find that increasing can enhance...

Objectives: Warfarin is often used for ischemic stroke prevention in patients with atrial fibrillation (AF), but the factors affecting patient adherence to warfarin therapy have not been fully understood. Methods: A cross-sectional survey was conducted AF undergoing at least 6 months prior study. The clinical data collected using questionnaires by phone interviews included following: 1) self-reported measured Morisky Medication Adherence Scale-8 © ; 2) beliefs about medicines surveyed...

After myocardial infarction (MI), cardiac fibrosis greatly contributes to left ventricular remodeling and heart failure. The intermediate-conductance calcium-activated potassium Channel (KCa3.1) has been recently proposed as an attractive target of fibrosis. present study aimed detect the effects KCa3.1 blockade on following MI its potential mechanisms.Myocardial expression was initially measured in a mouse model by Western blot real time-polymerase chain reaction. Then after treatment with...

The existing risk sores for ST-elevation myocardial infarction (STEMI) patients cannot balance timeliness, feasibility, and accuracy. This study aimed to develop validate a two-stage scoring system capable of dynamic evaluation 30-day mortality among STEMI patients. We recruited 3939 randomly assigned (7:3) derivation (N = 2757) internal validation 1182) datasets, an independent cohort 1315 was used external validation. developed based on factors associated with identified by multivariate...

The extraction of power line plays a key role in inspection by Unmanned Aerial Vehicles (UAVs). While it is challenging to extract lines aerial images because the weak targets and complex background. In this paper, novel method proposed. First all, we create segment candidate pool which contains segments large amount other segments. Secondly, construct irregular graph model with these as nodes. Then object-based Markov random field anisotropic weighted penalty (OMRF-AWP) It defines new...

Surveillance of SF6 decomposition products is significant for detection partial discharge (PD) in gas insulation switchgear (GIS). As a basis on-site and diagnosis, PD early-warning aims to quickly find the abnormalities using simple cheap device. In this paper, SO2 chosen as feature product detected through ultraviolet spectroscopy. The derivative method employed baseline correction spectral enhancement. standard gases main are qualitatively quantitatively detected. Then experiments with...

Hydrophobicity is an important parameter to characterize electrical properties of insulated materials. Therefore, it urgent task develop on-line instruments identify the hydrophobicity material's surface conveniently, quickly and accurately. For this purpose, a novel evaluation system with image processing decision tree proposed which based on embedded platform. obtaining satisfactory results, we first propose mixed segmentation method overcome complex conditions outside, concerning...

To evaluate the influence of type 2 diabetes mellitus on long-term outcomes Chinese patients with previous myocardial infarction, we studied 864 including 251 and 613 without mellitus, over a median follow-up time 2.9 years. The were subdivided into 95 insulin-treated 156 non-insulin-treated subjects. crude incidences (per 1000 patient-years) in subjects versus non-type 43.7 25.1 for recurrent 68.7 28.3 all-cause death 99.8 49.9 composite end point (i.e. infarction or death). Cox regression...