Showing papers by "Chongqing University of Technology published in 2016"
TL;DR: In this article, the research and development status of casting magnesium alloys including the commercial casting alloys and the new types casting alloy are reviewed, with more attention to microstructure and mechanical properties of modified-AZ91, AM60 and WE43 alloys with various additions.
361 citations
TL;DR: It is found that Ni4Fe1-LDH can remove more than 92% of MO in 10 min at the 10mg/L MO initial concentration, and 97% of Cr(VI) in 1 h at 4 mg/L Cr2O7(2-) initial concentration.
241 citations
TL;DR: This paper proposes a novel GrC method of machine learning by using formal concept description of information granules, and a real-life case study is considered and experimental evaluation is performed by five datasets, valuable for applying these theories to deal with practical issues.
Abstract: The main task of granular computing (GrC) is about representing, constructing, and processing information granules. Information granules are formalized in many different approaches. Different formal approaches emphasize the same fundamental facet in different ways. In this paper, we propose a novel GrC method of machine learning by using formal concept description of information granules. Based on information granules, the model and mechanism of two-way learning system is constructed in fuzzy datasets. It is addressed about how to train arbitrary fuzzy information granules to become necessary, sufficient, and necessary and sufficient fuzzy information granules. Moreover, an algorithm of the presented approach is established, and the complexity of the algorithm is analyzed carefully. Finally, to interpret and help understand the theories and algorithm, a real-life case study is considered and experimental evaluation is performed by five datasets from the University of California—Irvine, which is valuable for applying these theories to deal with practical issues.
232 citations
TL;DR: Results reveal that KNaSiF6:Mn(4+) presents good luminescent properties and could be a potential candidate material for application in back-lighting systems.
Abstract: Red phosphors AMF6:Mn4+ (A = Na, K, Cs, Ba, Rb; M = Si, Ti, Ge) have been widely studied due to the narrow red emission bands around 630 nm. The different emission of the zero-phonon line (ZPL) may affect the color rendering index of white light-emitting diodes (WLED). The primary reason behind the emergence and intensity of ZPL, taking KNaSiF6:Mn4+ as an example, was investigated here. The effects of pressure on crystal structure and luminescence were determined experimentally and theoretically. The increase of band gap, red shift of emission spectrum and blue shift of excitation spectrum were observed with higher applied pressure. The angles of ∠FMnF and ∠FMF(M = Si, Ti, Ge) were found clearly distorted from 180° in MF62– octahedron with strong ZPL intensity. The larger distorted SiF62– octahedron, the stronger ZPL intensity. This research provides a new perspective to address the ZPL intensity problem of the hexafluorosilicate phosphors caused by crystal distortion and pressure-dependence of the lumine...
220 citations
TL;DR: This paper constructs a 3D-based Deep Convolutional Neural Network to directly learn spatio-temporal features from raw depth sequences, then compute a joint based feature vector named JointVector for each sequence by taking into account the simple position and angle information between skeleton joints.
145 citations
TL;DR: This work proposes two kinds of generalized multigranulation double-quantitative decision-theoretic rough set theory, which will be more feasible when making decisions in real life and an illustrative case is shown to elaborate the theories advantage of GMDq-DTRS.
Abstract: The principle of the minority subordinate to the majority is the most feasible and credible when people make decisions in real world. So generalized multigranulation rough set theory is a desirable fusion method, in which upper and lower approximations are approximated by granular structures satisfying a certain level of information. However, the relationship between a equivalence class and a concept under each granular structure is very strict. Therefore, more attention are paid to fault tolerance capabilities of double-quantitative rough set theory and the feasibility of majority principle. By considering relative and absolute quantitative information between the class and concept, we propose two kinds of generalized multigranulation double-quantitative decision-theoretic rough sets(GMDq-DTRS). Firstly, we define upper and lower approximations of generalized multigranulation double-quantitative rough sets by introducing upper and lower support characteristic functions. Then, important properties of two kinds of GMDq-DTRS models are explored and corresponding decision rules are given. Moreover, internal relations between the two models under certain constraints and GMDq-DTRS and other models are explored. The definition of the approximation accuracy in GMDq-DTRS is proposed to show the advantage of GMDq-DTRS. Finally, an illustrative case is shown to elaborate the theories advantage of GMDq-DTRS which are valuable to deal with practical problems. Generalized multigranulation double-quantitative decision-theoretic rough set theory will be more feasible when making decisions in real life.
118 citations
TL;DR: In this paper, the mechanism for localised corrosion in AA 2099-T83 alloy during immersion in 3.5% NaCl solution is investigated, and it is found that localized corrosion tends to occur in the grain with relatively large Schmid factor.
112 citations
TL;DR: Molecular modeling and experimental investigation of compound 15m with DNA suggested that this compound could effectively bind with DNA to form a steady 15m-DNA complex which might further block DNA replication to exert the powerful bioactivities.
81 citations
TL;DR: In this article, a wide-ranging 2D mathematical model for CO 2 absorption from N 2 /CO 2 mixture is proposed, where single solvents [H 2 O, ethylenediamine (EDA), diethanolamine (DEA), monoethanolamine (MEA), piperazine (PZ), and blended solvent [DEA/PZ] were used as the absorbents.
76 citations
TL;DR: In this article, the chemical compositions, morphologies and corrosion resistance of Zn-Ca-Ce-P coatings were investigated through energy-dispersive X-ray spectroscopy (EDS), XPS, XRD, electron probe micro-analysis (EPMA) and scanning electron microscopy (SEM) together with hydrogen volumetric and electrochemical tests.
76 citations
TL;DR: Wang et al. as mentioned in this paper examined the historical evolution of energy consumption in China's logistics industry using the logarithmic mean divisia index (LMDI) method to analyze the key factors that drove the chronicle changes in logistics energy consumption.
Abstract: The logistics industry plays a critical role in boosting China’s economic development, although at significant externality costs. Using the 1980–2010 data, we examine the historical evolution of energy consumption in China’s logistics industry. The logarithmic mean Divisia index (LMDI) method was used to analyze the key factors that drove the chronicle changes in logistics energy consumption in China. Changes in energy consumption of China’s logistics industry are attributed to growth in logistics activity, modal shift in freight transportation, increases in transport intensity, and overall improvements in energy intensity: (1) China’s logistics industry enjoyed fast growth with an average annual growth rate of 9.65% from 1980 to 2010. Increase in logistics activity has been the major force driving up logistics energy consumption (accounting for 48.8% of logistics energy increase); (2) Logistics energy consumption increased by 22.91 times, averaging at 11.9% growth per year. Fuel consumption in highway transportation has become more dominant in logistics energy consumption; (3) While changes in logistics activities, transportation modes and transport intensity pushed up logistics energy consumptions, improvements in energy intensity helped significantly to curb the energy rise in China’s logistics industry.
TL;DR: In this article, a new concept of fine energy consumption allowance (FECA) for workpieces has been proposed contributing to strengthening energy monitoring and management and improving energy efficiency in the mechanical manufacturing industry.
TL;DR: In this article, a highly stable motion with orthogonally alternating electric field is established to build the relationship between spatial displacement and time standards, and displacement is measured by counting the time pulses that serve as measurement standards.
Abstract: A highly stable motion with orthogonally alternating electric field is established to build the relationship between spatial displacement and time standards. Displacement is measured by counting the time pulses that serve as measurement standards. Thus, a displacement method is called time grating. An orthogonally alternating electric field is generated using two rows of differential capacitive sensing electrodes excited by four sinusoidal voltages. Sine-shaped grating planes rather than hyperfine grating lines are used to pick up the displacement signals. Electrode lead wires are designed below the middle of the electrodes and fabricated using multilayer thin-film technology to suppress the cross-sensitivity effect. A time-grating sensor has been fabricated to evaluate the proposed method. The range of measurement is 200 mm, the width of the electrode is 0.2 mm, the interval between two adjacent electrodes is 20 $\mu \text{m}$ , and the gap for capacitive sensing is 0.3 mm. Experimental results indicate that the measurement accuracy reaches ±200 nm with 1-nm resolution. Nanometer accuracy and resolution are achieved using sensing units with sub-millimeter periods. So, the cost for manufacturing the time-grating sensor can be decreased effectively in comparison to traditional nanometrology displacement sensors, and it may be a suitable low-cost alternative to long-range nanometrology.
TL;DR: Theoretically, the asymptotic stability of the malware-free equilibrium is confirmed when the threshold is below the unity, and the global stability is further proved under some sufficient conditions.
TL;DR: The security awareness of users should be taken both in the interpretation of malware parameters, as well as in the prediction of the evolution of future malware outbreaks, according to a new compartmental model that takes into account heterogeneous immunization of the computer.
TL;DR: In this article, a porous hybrid composite (Na 2 Ti 3 O 7 /rGO) was successfully synthesized via a facile solvothermal method, which exhibits significantly enhanced electrochemical performances due to the porous interconnected conductive network with uniformly embedded nanowires, which is beneficial for the increase of contact area between the electrolyte and active material.
TL;DR: In this paper, a rotary-coated core-shell-structured BaTiO3@polymer nanoparticles were constructed by using carboxyl-functionalized poly(arylene ether nitrile) (CPAEN) as the polymeric surface-grafting agent.
TL;DR: In this paper, the authors investigated the variations in annual performance of three proposed natural draft cooling towers, i.e., a Natural Draft Dry Cooling Tower (NDDCT), a pre-cooled NDDCT and a natural draft Wet cooling tower (NDWCT), compared with that of the NDWCT.
TL;DR: The well-dispersed copper nanowires (Cu NWs) with diameter of about 65nm and length of 70μm were successfully synthesized by a rapid and facile hydrothermal method.
TL;DR: A novel tetraphenylethene-based fluorescent sensor could be used to visually distinguish UO2(2+) from lanthanides, transition metals, and alkali metals under UV light; the presence of other metal ions did not interfere with the detection of uranyl ions.
TL;DR: The proposed update algorithm substantially reduces the number of shortest paths which should be re-computed when a graph is changed, and a community detection algorithm is adapted to show how much benefit can be obtained from the proposed algorithm in a practical application.
TL;DR: Compound 3a should be a potential lead antibacterial molecule with dual action modes, especially against methicillin-resistant Staphylococcus aureus with minimal inhibitory concentration value of 8 µg/ml.
Abstract: Aim: Due to bacterial drug resistance, a new series of quinazolinone azolyl ethanols were synthesized and evaluated. Results: In vitro antibacterial assay showed that triazolyl ethanol quinazolinone 3a was the most active compound, especially against methicillin-resistant Staphylococcus aureus (MRSA) with minimal inhibitory concentration value of 8 µg/ml, which was superior to chloromycin and comparable to norfloxacin. Molecular docking study displayed that compound 3a could interact with MRSA DNA by the formation of hydrogen bonds. Further interactions of quinazolinone 3a with MRSA DNA suggested that it could intercalate into MRSA DNA to form 3a–DNA complex. DNA cleavage properties of 3a–Cu2+ and 3a–Zn2+ complexes were confirmed by agarose gel electrophoresis experiments. Conclusion: Compound 3a should be a potential lead antibacterial molecule with dual action modes.
TL;DR: In this paper, the structural characterization of 10 1 2 twinning boundaries and exploring the growth mechanism of hexagonal close-packed (HCP) metals are summarized in detail, and a few critical scientific problems and further works on deformation twinning in HCP metals are proposed.
TL;DR: The results showed that the CQD/BiOI 1.5 wt.% sample exhibited the optimum photocatalytic activity, which was 2.5 times that of the pure BiOI.
Abstract: Novel carbon quantum dot (CQD)-modified BiOI photocatalysts were prepared via a facile hydrothermal process. The CQD-modified BiOI materials were characterized by multiple techniques. The CQD with an average size around several nanometers was distributed on the surface of BiOI microsphere. Its photocatalytic activity was investigated sufficiently by the photodegradation of methylene orange (MO). The results showed that the CQD/BiOI 1.5 wt.% sample exhibited the optimum photocatalytic activity, which was 2.5 times that of the pure BiOI. This improvement was attributed to the crucial role of CQDs, which could be acted as a photocenter for absorbing solar light, charge separation center for suppressing charge recombination.
TL;DR: In this paper, the coupling effects of dynamic asymmetry and compositional asymmetry are investigated by morphology evolution and viscoelasticity change in SBS modified bitumen for the interpretation of phase morphology evolution.
TL;DR: Results indicate very good sensitivity of the three-layer FOEW sensor, which showed a 3.91-fold improvement in the detection of the target antibody relative to a conventional sensor with a core-cladding structure, and the novel sensor showed a lower limit of detection of 0.2ng/l and a response time around 320s.
TL;DR: In this paper, a modified ZrO2 membrane with hexadecyltrimethoxysilane (HDTMS) was fabricated for water-in-oil emulsion separation.
Abstract: Growing environmental concerns have fueled the need for efficient separation of oil–water mixtures. Membranes that separate oil–water mixture based on contrasting wetting properties have recently received significant attention. Here, hydrophobic and oleophilic ceramic membranes have been successfully prepared for the application of water-in-oil emulsion separation. The membranes were fabricated by modification the ZrO2 membrane with hexadecyltrimethoxysilane (HDTMS). SEM, EDS, and pore size measurements depict that HDTMS has been grafted onto the ZrO2 membrane surface without changing the membrane morphology and pore structure. Contact angle measurements confirm that HDTMS modification improves the membrane hydrophobicity and oleophilicity. The modified membrane was thermally stable to 220 °C, and had good chemical stability in a series of organic solvents, even under high-speed scouring. The antifouling performance of the modified membrane was assessed via the filtration of water-in-oil emulsions. The modified membranes showed higher oil flux and higher water rejection compared with the unmodified membranes. The modified membrane can separate all the water droplets from the water-in-oil emulsions. The hydrophobicity of the grafted HDTMS chains was considered to be responsible for reducing the water droplet adsorption on the membrane surface.
TL;DR: In this article, a direct injection spark ignition (DISI) methanol engine with hydrogen addition ratio from 5% to 15% has been investigated numerically based on the detailed METH reaction mechanism combined with the nitrogen oxides (NOX) reaction mechanism using the PREMIX code of CHEMKIN program with AVL FIRE software.
TL;DR: In this paper, annealing samples of a rolled tin bronze sheet were analyzed by electron channeling contrast imaging and electron backscatter diffraction techniques to probe the optimization potential of grain boundary character distribution (GBCD) for this material.
TL;DR: In this paper, the surface of a fully recrystallized Zr702 is treated by pulsed laser following which microstructural changes are investigated by use of electron backscatter diffraction and electron channeling contrast imaging techniques.