The selective ensemble aims to search the optimal subset balanced accuracy and diversity from the original base classifier set to construct an ensemble classifier with strong generalization ...performance. A selective ensemble classifier named BRFS-APCSC is proposed in this paper, which realizes the generation and selection of a set of accurate and diverse base classifiers respectively. In the first step, a multimodal perturbation method is introduced to train distinct base classifiers. The method perturbs the sample space by Bootstrap and disturbs the feature space under a newly proposed semi-random feature selection, which is a combination of the core attribute theory and the improved maximum relevance minimum redundancy algorithm. Then, to search the optimal classifier subset, affinity propagation clustering is added to cluster base classifiers in the first step, then the base classifiers are regarded as features so that the improved maximum relevance minimum redundancy algorithm is applied to select parts of base classifiers from each cluster for integration. UCI datasets and an actual dataset of semi-decarbonization are employed to verify the performance of BRFS-APCSC. The experimental results demonstrate that BRFS-APCSC has significantly difference with other selective ensemble methods and improve the classification accuracy.
In order to obtain the inorganic efficient antibacterial agents, the means of ion doping and morphology construction in this research are used to enhance the antibacterial property of nano-MgO, which ...is according to the “oxidative damage mechanism” and “contact mechanism”. In this work, the nano-textured Sc
2
O
3
-MgO are synthesized by doping Sc
3+
in nano-MgO lattice through calcining at 600 °C. When the Sc
3+
content reaches 10%, the nanotextures on the powders surface are pretty clearly visible and uniform, and the specific surface area and the oxygen vacancy are ideal, so that the 10% Sc
3+
-doped powders (SM-10) has the excellent antibacterial property against
E. coli
and
S. aureus
(MBC = 0.03 mg/mL). The efficient antibacterial agents in this research have a better antibacterial effect than the 0% Sc
3+
-doped powders (SM-0, MBC = 0.20 mg/mL) and the commercial nano-MgO (CM, MBC = 0.40 mg/mL), which have application prospects in the field of antibacterial.
The selective ensemble aims to search the optimal subset balanced accuracy and diversity from the original base classifier set to construct an ensemble classifier with strong generalization ...performance. A selective ensemble classifier named BRFS-BDA-SENC is proposed in this paper, which realizes the generation and selection of a set of accurate and diverse base classifiers, respectively. In the first step, a multimodal perturbation method is introduced to train distinct base classifiers. The method perturbs the sample space by bootstrap and disturbs the feature space under a newly proposed semi-random feature selection, which is a combination of the core attribute theory and the improved maximum relevance minimum redundancy criterion. Then, to search the optimal classifier subset, the binary dragonfly algorithm is utilized to adaptively select eligible base classifiers. UCI data sets and an actual data set of the blade icing of wind turbine are employed to verify the performance of BRFS-BDA-SENC. The experimental results demonstrate that BRFS-BDA-SENC has significant difference with other selective ensemble methods and improves the classification accuracy.
In order to fabricate antibacterial nanofiber membranes for tissue engineering field, the oxidative damage of magnesium hydroxide nanoparticles (Mg(OH)2 NPs) against the model system of Escherichia ...coli (E. coli) was researched by measuring the oxidative stress response, oxidative stress products and glucose metabolism. The toxicity of Mg(OH)2 NPs to a normal biological system was evaluated in vivo through the acute oral toxicity, blood physiological and serum biochemical markers and acute skin irritation, indicating that the Mg(OH)2 NPs exhibited great biosafety. The Mg(OH)2 NPs with antibacterial property and biosafety were loaded on PCL/PVP nanofiber substrates through electrospinning technology to fabricate the Mg(OH)2/PCL/PVP nanofiber membranes. The results of characterization and antibacterial test showed that the Mg(OH)2/PCL/PVP nanofiber membranes with 8.0 wt% Mg(OH)2 NPs present excellent antibacterial rate of 100% against E. coli that the Mg(OH)2 NPs can be physically and evenly loaded on nanofiber substrates.
•Oxidative damage of Mg(OH)2 NPs against E. coli was evaluated.•Biosafety of Mg(OH)2 NPs was evaluated in vivo.•Mg(OH)2/PCL/PVP nanofiber membranes were fabricated for the first time.•Mg(OH)2 NPs were loaded on nanofiber substrates by electrospinning method.
The use of cement clinker in concrete results in the production of greenhouse gases. Rubber powder and polypropylene fiber were chosen in this study to replace part of the cement in the creation of a ...unique type of low-clinker, high-performance concrete in order to reduce the amount of cement clinker used in concrete and therefore its impact on the environment. The volumetric stability of concrete was studied using flat plate and circular trials under the impact of various conditions. The study's findings revealed that the addition of rubber powder and fibers could successfully prevent the creation of fractures in concrete. The optimum crack development prevention is achieved when the water-cement ratio is 0.25 and the sand rate is 36%, however the amount of cement has a negative influence on the concrete's early fracture resistance.
Background. Myocardial injury refers to a major complication that occurs in myocardial ischemia/reperfusion injury (MI/RI). Honokiol is a well-recognized active compound extracted from the ...traditional Chinese herb known as Magnolia officinalis and is utilized in treating different vascular diseases. This research is aimed at examining whether Honokiol might alleviate myocardial injury in an MI/RI model. Methods. Seventy-eight male C57BL/6 mice were categorized randomly into three cohorts including the Sham operation (Sham) cohort, the MI/RI cohort (Con), and the Honokiol cohort (n=26 for each cohort). The mice in the Honokiol cohort were treated with Honokiol before MI/RI surgery (0.2 mg/kg/day for 14 days, intraperitoneal), while the mice in the Con cohort were given an intraperitoneal injection with an equivalent volume of vehicle (DMSO) daily in 14 days prior to exposure to MI/RI. After the surgery, creatine kinase- (CK-) MB and cardiac troponin T (cTnT) levels, as well as the infarct area, were measured to assess the degree of myocardial damage. Apoptotic levels were detected using terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) staining. Electron microscopy was utilized to identify mitochondrial damage. Lastly, the expression levels of glyceraldehyde-3-phosphate dehydrogenase (GAPDH), cleaved caspase-9, cytochrome C (Cyt-C), B cell lymphoma/leukemia-2 (Bcl-2), B cell lymphoma/leukemia-2 associated X (Bax), AKT, p-AKT, PI3K, and p-PI3K were analyzed utilizing western blotting. Results. Honokiol can reduce the MI/RI-induced cTnT and CK-MB levels, apoptosis index, and mitochondrial swelling in cardiomyocytes via activating the PI3K/AKT signaling pathway. Conclusion. Honokiol provides cardiac protection from MI/RI by suppressing mitochondrial apoptosis through the PI3K/AKT signaling pathway.
This paper fabricated three-dimensional (3D) honeycomb sandwich structure fabrics with three different cross-section shapes on an ordinary loom by reasonable design with low cost. The 3D honeycomb ...sandwich structure composites were fabricated by the vacuum assisted resin transfer molding process. Then, the bending properties of 3D honeycomb sandwich structure composites with different cross-section shapes were tested. The results showed that the 3D honeycomb sandwich structure composite with a hexagonal cross-section shape had the maximum load, the 3D honeycomb sandwich structure composite with a triquetrous cross-section shape had the minimum load and the 3D honeycomb sandwich structure composite with a quadrangular cross-section shape had a load between the two. The bending failure mode showed that the 3D honeycomb sandwich structure composite had a typical bending failure mode with compression failure in the front and tensile failure in the back. Finally, the load–displacement curves and failure mode were obtained by FEM (Finite Element Method) simulation with ABAQUS software. The good agreements of comparisons proved the validity of the FEM.
The multifunctional polyethylene terephthalate (PET) fabrics were successfully prepared through a dip-coating technology to endow the flame retardant and antibacterial properties of PET fabrics, ...which are extensively used in many fields. The flame retardant and antibacterial agent was synthesized by a double drop-reverse precipitation method and surface-modified by the mixtures of titanate coupling agents and stearic acid to result in a good compatibility of the hydrophilic nano-Mg(OH)
and the hydrophobic PET fabrics. The results indicated that the suitable synthesis conditions of nano-Mg(OH)
are: Mg
concentration 1.5 mg/mL, reaction temperature 50 °C and reaction time 50 min, and the optimal modification conditions of nano-Mg(OH)
are: modifier ratio 5/5, modification temperature 70 °C and modification time 40 min. The flame retardant test and the antibacterial test showed that the multifunctional PET fabrics had excellent flame retardant and antibacterial properties.
A previously undescribed monopartite begomovirus was identified in Kampot province, Cambodia, in
Malvastrum coromandelianum
plants exhibiting yellow vein symptoms characteristic of begomovirus ...infections. The apparently full-length viral component was cloned and sequenced following enrichment of circular DNA by rolling-circle amplification and restriction enzyme digestion. The genome of the virus was 2737 nucleotides in length (KP188831) and exhibited an organization like that of other monopartite begomoviruses, sharing the highest nucleotide sequence similarity (87.7% identity) with ageratum yellow vein virus (AM940137). A satellite molecule was amplified from total DNA by PCR amplification, using the betasatellite-specific primer pair β01/β02. The satellite molecule (1346 nt, KP188832) had structural characteristics like those of other betasatellites associated with begomoviruses and shared the highest nucleotide sequence similarity (84.8% identity) with malvastrum yellow vein betasatellite (MN205547). According to the criteria established for species demarcation for classification of begomoviruses (family
Geminiviridae
) and betasatellites (family
Tolecusatellitidae
), respectively, the virus isolate from
M. coromandelianum
in Cambodia is a previously undescribed novel monopartite begomovirus, for which the name “malvastrum yellow vein Cambodia virus” (MaYVCV) is proposed, and the betasatellite is a previously undescribed novel betasatellite, for which the name “malvastrum yellow vein Cambodia betasatellite” (MaYVKHB) is proposed.
•Adsorbed anionic dye molecules are conducive to preferential growth of (001) plane of Mg(OH)2 crystal for Mg(OH)2 pigments.•Uniform coverage of nanosized Mg(OH)2 pigments on fiber surface is ...achieved via surface-initiated ATRP.•About 4wt% of Mg(OH)2 pigment on fiber surface shortens nearly half of burning time of cellulose.
Mg(OH)2 flame retardant hybrid pigment is synthesized through simultaneous solution precipitation and adsorption of anionic dyes (C.I. Acid Red 6). The Mg(OH)2 hybrid pigment bearing vinyl groups after surface silane modification is immobilized onto the surface of bromo end-functional cellulose fiber by atom transfer radical polymerization (ATRP). The morphology and structure of Mg(OH)2 pigments and cellulose fibers grafted with modified pigments are characterized. The thermal properties, flammability and color fastness of cellulose fibers grafted with modified pigments are measured. The results reveal that anionic dye molecules are adsorbed onto Mg(OH)2 crystals and affect the formation of lamella-like Mg(OH)2 crystals. The cellulose fiber grafted with modified Mg(OH)2 hybrid pigment absorbs about four times heat more than original cellulose fiber with about 4% immobilization ratio of pigment, which shortens nearly half of afterflame time and afterglow time.
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