High-quality original image is very important in robot vision inspection system and illumination is a significant component that directly affect cameras optical imaging system and plays a decisive ...role on image quality. To guarantee camera imaging system for high-quality images and achieve automatic illumination control in the motion of inspection robot under dark environment, this paper proposes an optimal light intensity planning method based image quality analysis. It is mainly achieved by building a computational model to automatically predict optimal light intensity values for desired image quality when camera observation distances fluctuate. Before regression modeling, it is necessary to extract discriminative features representing image quality. We design feature extractor by deep learning instead of human engineers which required careful engineering and considerable domain expertise. Deep learning methods are representation-learning methods that allows a machine to be fed with raw data and to automatically discover the representations needed for regression or classification. Experimental results demonstrate the feasibility and efficiency of this method.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
How dissymmetrical tails (
i.e.
tails of different lengths) in one lipid molecule exert an impact on the structure and properties of the resulting assembly is an intriguing issue in both biological ...and material senses. However, the underlying mechanism that engenders such phenomena is still obscure, which prompted us to unmask it by exploring the self-assembly behaviours of artificial building blocks comprising dissymmetrical tails. Here, a series of Fmoc-protected ornithine lipids with dissymmetrical alkyl tails was designed and the dissymmetry of the two tails was found to hierarchically tune the self-assembled nanostructures from nanotubes to bundles and nanotwists. With the Fmoc-headgroup employed as a chromophorous probe, it was revealed that the alkyl chain dissymmetry controlled the interacting modes of van der Waals interactions between alkyl tails, π-π stacking between Fmoc motifs and hydrogen bonding formed by the three amide bonds in lipid bilayers. The counterbalance between those noncovalent interactions was responsible for such remarkable tuning ability towards self-assembly and emissive behaviours of the lipids, including circularly polarized light emission. This work provides insight into dissymmetrical tails-regulated biological structures and functions of natural lipids, and also sets up a novel strategy of rationally modulating chiral and emissive properties of supramolecular materials,
i.e.
, tunable CPL materials, by exploitation of the tail dissymmetry.
A strategy of designing Fmoc-protected ornithine lipids with dissymmetrical alkyl tails was employed to hierarchically tune the self-assembled lipid nanostructures from nanotubes to bundles and nanotwists.
ABSTRACT Introduction The key objective of aerobic exercise is enhancing cardiorespiratory endurance. On the national gymnastics plan implementation, the idea of lifelong sports was gradually ...accepted by the masses, and the aerobic gymnastics concept was sweeping the world. Objective Analyze the cardiorespiratory endurance responses in female college students under different frequencies in aerobic exercise. Methods 20 female professors and civilian women were randomly selected and divided into two groups. The experimental group performed 45 and 90 minutes of aerobic exercise to analyze changes in cardiopulmonary function before and after each exercise. Results After 16 weeks of aerobic exercise with different loads, all young women who had participated in the program training showed a significant increase in vital capacity and maximal oxygen uptake capacity. The vital capacity of the 90-min aerobic exercise group was significantly higher than that of the 45-min aerobic exercise group (P<0.05). Conclusion The establishment of a cardiorespiratory endurance response model can accurately analyze the effects of different aerobic exercise frequencies on cardiorespiratory endurance. Evidence Level II; Therapeutic Studies – Investigating the results.
RESUMEN Introducción El objetivo principal del ejercicio aeróbico es mejorar la resistencia cardiorrespiratoria. Con la puesta en marcha del plan nacional de gimnasia, la idea de los deportes de por vida es gradualmente aceptada por las masas y el concepto de la gimnasia aeróbica está popularizándose en todo el mundo. Objetivo Analizar las respuestas de resistencia cardiorrespiratoria en estudiantes universitarias bajo diferentes frecuencias en el ejercicio aeróbico. Métodos Se seleccionaron al azar 20 profesoras jóvenes y mujeres civiles y se dividieron en dos grupos. El grupo experimental realizó ejercicios aeróbicos de 45 y 90 minutos, bajo el análisis de los cambios en la función cardiopulmonar antes y después de cada ejercicio. Resultados Tras 16 semanas de ejercicio aeróbico con diferentes cargas, todas las mujeres jóvenes que participaron en el entrenamiento mostraron un aumento significativo de la capacidad vital y de la capacidad máxima de captación de oxígeno. La capacidad vital del grupo de ejercicio aeróbico de 90 minutos fue significativamente mayor que la del grupo de ejercicio aeróbico de 45 minutos (P<0,05). Conclusión El establecimiento de un modelo de respuesta a la resistencia cardiorrespiratoria puede analizar con precisión los efectos de diferentes frecuencias de ejercicio aeróbico sobre la resistencia cardiorrespiratoria. Nivel de evidencia II; Estudios terapéuticos - Investigación de resultados.
RESUMO Introdução O principal objetivo do exercício aeróbico é melhorar a resistência cardiorrespiratória. Com a implementação do plano nacional de ginástica, a ideia de esportes para toda a vida é gradualmente aceita pelas massas e o conceito de ginástica aeróbica está popularizando-se. Objetivo Analisar as respostas de resistência cardiorrespiratória em estudantes universitárias sob distintas frequências no exercício aeróbico. Métodos 20 jovens professoras e mulheres civis foram aleatoriamente selecionadas e divididas em dois grupos. O grupo experimental executou exercícios aeróbicos de 45 e 90 minutos, sob análise das alterações na função cardiopulmonar antes e depois de cada exercício. Resultados Após 16 semanas de exercício aeróbico com diferentes cargas, todas as mulheres jovens que participaram do treinamento mostraram um aumento significativo na capacidade vital e na capacidade máxima de absorção de oxigênio. A capacidade vital do grupo de exercícios aeróbicos de 90 minutos foi significativamente maior do que a do grupo de exercícios aeróbicos de 45 minutos (P<0,05). Conclusão O estabelecimento de um modelo de resposta de resistência cardiorrespiratória pode analisar com precisão os efeitos de diferentes frequências de exercício aeróbico sobre a resistência cardiorrespiratória. Nível de evidência II; Estudos Terapêuticos - Investigação de Resultados.
•In this paper, the self-diagnostic performance of conductive asphalt concrete is investigated.•To prepare carbon fiber-graphite conductive asphalt concrete.•To verify the force-electrical ...sensitivity of the mixture using direct–indirect tensile tests.•To clarify the exact correlation law between resistivity and cracking damage, and to verify its road properties.
The correlation between the electrical properties of carbon fiber-graphite composite conductive asphalt mixes and their cracking damage can provide an early warning function for cracking. This study is devoted to exploring the force-electrical sensitivity of conductive concrete to find new solutions for asphalt pavement cracking warning. Firstly, a carbon fiber-graphite composite modified asphalt mixture was prepared; Secondly, the force-electrical sensitivity of the mixture was verified by direct and indirect tensile creep test. The tests showed that the resistivity and its cracking degree had a strong correlation. As the crack increases, so does the resistance. When the cracking reaches a certain level, the sudden change in resistance indicates that the mixture has been destroyed internally. Its resistivity and strain show a clear correlation before the mixture is broken. With the increase of strain, the resistivity gradually decreases. At the stage of large fluctuations in resistivity, it can be assumed that the mixture has reached the load carrying capacity limit, and at the stage of increasing resistivity abruptly, it can be judged that the mixture has undergone damaged and lost strength. Finally, the road performance was verified. A comparative study found that the high temperature, water stability and crack resistance are better than those of ordinary and graphite, and the fatigue performance is better than that of graphite. The research of the carbon fiber-graphite composite conductive asphalt concrete provides technical support for the application of the next crack warning function.
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In extracting the aged asphalt from field pavement via centrifugal extraction method, the trichloroethylene solvent tends to reside in the recycled asphalt, which can bias the property assessments of ...the recycled asphalt. This research evaluated the physical and rheological properties of the recycled asphalt that contained different masses of trichloroethylene, via fluorescence microscopy, Fourier transform infrared (FTIR) and dynamic shear rheology tests. Based on the test results, the effects of trichloroethylene on the properties of asphalt-trichloroethylene system were derived. It was found that the fluorescence microscope worked well for distinguishing the morphologies of trichloroethylene and asphalt in the trichloroethylene-asphalt system. A method was thus developed based on microscope image recognition to calculate the content of trichloroethylene in the asphalt. The FTIR results indicated that the interactions between the trichloroethylene and asphalt compositions generated two new absorption peaks in the infrared spectra, namely 562 cm−1 and 994 cm−1. The ratio of the above two peak areas (i.e., I994/I562) exhibited a two-stage linear varying trend with the trichloroethylene content, which provided references for predicting the trichloroethylene content in the asphalt using the infrared spectra. Trichloroethylene also influenced the rheological properties of recycled asphalt, including the shear modulus, phase angle, non-recoverable deformation and elastic recovery. As the trichloroethylene content rose, the shear modulus and elastic recovery of the trichloroethylene-asphalt system reduced, while the phase angle and non-recoverable deformation of the system increased. The above relationships between the trichloroethylene content and the properties of the asphalt-trichloroethylene system were expected to exclude the effect of the residual trichloroethylene on the asphalt properties, to improve the performance assessments of the recycled asphalt.
•Physical and rheological properties of TCE-asphalt system were tested.•Effects of TCE on the performance of the recycled asphalt were investigated.•Relationships between TCE contents and asphalt-TCE properties were derived.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
The rational design strategy to construct lanthanide ion functionalized metal organic frameworks (MOFs) has attracted tremendous attention as they are promising candidates for developing novel ...luminescence materials and optical sensors owing to their intense, long-lived and tunable luminescence performances. In this work, a series of Eu3+/Tb3+ singly doped or codoped bismuth-based MOFs were prepared under in situ facile solvothermal conditions using BiOBr nanoplates as bismuth resources. A red-green-blue-based trichromatic white-light emission can be finely achieved by modulating the doping ratio of Eu3+/Tb3+ in the blue-emitting Bi-MOF host material and such photoluminescence tuning can also be realized by controlling the excitation wavelength. In addition, the Eu3+/Tb3+ singly incorporated Bi-MOF can serve as a multifunctional fluorescent probe for sensing Fe3+ and Cr2O72− ions in aqueous solution, as well as small organic pollutants of acetone molecules, and their sensing mechanisms have also been analyzed. These lanthanide ion functionalized Bi-MOF materials exhibit great potential in exploring white-light emitting devices and construction of supersensitive multifunctional sensors.
•MCP-1 A-2518 G polymorphism correlates with an elevated risk of AD.•MCP-1 A-2518 G polymorphism correlates with the increased MCP-1 serum levels.•The interaction between MCP-1 A-2518 G polymorphism ...and smoking contributes to increased risk of AD.
Monocyte chemoattractant protein-1 (MCP-1) is reported to associate with the severity and development of Alzheimer’s disease (AD). While a few studies have examined the association between the MCP-1 A-2518 G polymorphism and AD risk, no Chinese study has undertaken a study of this association. Therefore, a case-control study with 212 AD cases and 268 controls was designed in Chinese participants. Logistic regression analysis was utilized to probe the potential link between AD susceptibility and the MCP-1 A-2518 G polymorphism. We observed that the GG or GG + AG genotype was shown to elevate the risk of AD. Subgroup analysis revealed this increased risk effect was also presented in males, smokers, APOE ε4+ and those participants ≥ 65 years old. Notably, cross-over analysis found that this polymorphism interacted with smoking, contributing to the increased risk of AD. In addition, we found that the serum MCP-1 levels of AD patients were evidently higher than in controls. Furthermore, the MCP-1 A-2518 G polymorphism was linked with the serum MCP-1 levels of AD patients, but not controls. In conclusion, the MCP-1 A-2518 G polymorphism correlates with an elevated risk of AD and increased MCP-1 serum levels. The interaction between the MCP-1 A-2518 G polymorphism and smoking contributes to the increased risk for AD in Chinese Han individuals.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Inspired by the tubular structures found in naturally occurring thermal-insulating materials, tubular cellulose aerogels with improved mechanical resistant, thermal-insulating and flame-retardant ...properties were prepared from kapok fibers via a facile process. In contrast to fragileness of traditional organic-inorganic composites, an optimized sample exhibited an ultra-high compressive strength of 32 MPa. The tubular structure of this material resulted in a 37.4 °C increase in heat preservation compared with that obtained from a pulp aerogel without this morphology. The H3PO4 decomposed from (NH4)2HPO4 in the formulation crosslinked the outermost cellulose fibers to generate a clay-reinforced dense carbon layer in conjunction with montmorillonite, which restricted the movement of flames and the outflow of volatile compounds. The gaseous voids of internal tubular fibers interrupted the heat transport pathways to inhibit thermal transmission and trapped combustible volatiles to reduce the penetration pressure experienced by the dense carbon layer greatly. The combined effects of the carbon layer and tubular structure effectively limited the transfer of heat, oxygen and volatiles, leading to non-combustion of the optimal sample. This study provided a cost-effective and facile approach to prepare of thermal-insulating, fire-safe and high-strength aerogel showing promising applications in exterior wall insulation and vehicle interior.
Inspired by the tubular structures in nature, tubular cellulose aerogels with improved mechanical resistant, thermal-insulating and flame-retardant properties were prepared from kapok fibers via a facile process. Display omitted
•The bio-inspired tubular cellulose aerogel is simply fabricated from kapok fiber.•The tubular structure of aerogel results in a 37.4 °C increase in heat insulation.•The resultant aerogel self-extinguishes and exhibits excellent flame retardancy.•The resultant aerogel achieves an ultra-high compressive strength of 32 MPa.
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As the medium for self-assembly processes, solvents strongly influence the supramolecular assemblies via specific solute–solvent interactions, which may result in effective modulation of properties, ...self-assembled nanostructures, and functions through varying the solvent. Here, two kinds of pyridine-cyanostilbene functionalized chiral amphiphiles (l/d-PyPhG and l-PyG) were designed, and their self-assembly behaviors in different solvents were investigated. It was found that both amphiphiles formed gels in dimethyl sulfoxide (DMSO) and self-assembled into right-handed nanotwists, while they formed suspensions in ethanol consisting of left-handed nanotubes. Although the molecular chirality in the compounds remained unchanged in the two solvents, the nanoassemblies showed opposite handedness at the nanoscale together with opposite circular dichroism (CD) and circularly polarized luminescence (CPL) signals. Furthermore, when the amphiphiles were co-assembled with an achiral dye, it was found that efficient energy transfer took place in the systems composed of nanotubes rather than those composed of nanotwists. Therefore, by assembling molecules with the same molecular chirality in different solvents, a selective formation of helical nanotubes or nanotwists and the regulation of handedness as well as energy transfer efficiency were achieved.
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A novel CO2/N2 switchable n-decane-in-water emulsion was prepared, which is stabilized by a CO2/N2 switchable surfactant N′-dodecyl-N,N-dimethylacetamidine (DDMA) in cationic form in combination with ...positively charged alumina nanoparticles at concentrations as low as 0.01 mM and 0.001 wt %, respectively. The particles do not adsorb at the oil–water interface but remain dispersed in the aqueous phase between surfactant-coated droplets. A critical zeta potential of the particles of ca. +18 mV is necessary for the stabilization of the novel emulsions, suggesting that the electrical double-layer repulsions between particles and between particles and oil droplets are responsible for their stability. By bubbling N2 into the emulsions, demulsification occurs following transformation of DDMA molecules from the surface-active cationic form to the surface-inactive neutral form and desorption from the oil–water interface. Bubbling CO2 into the demulsified mixtures, cationic DDMA molecules are re-formed, which adsorb to the droplet interfaces, ensuring stable emulsions after homogenization. Compared with Pickering emulsions and traditional emulsions, the amount of switchable surfactant and number of like-charged particles required for stabilization are significantly reduced, which is economically and environmentally benign for practical applications.
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