The orientation of music teachers’ talent training and the construction of talent training models are the core issues of concern for the reform of music education majors. Facing the new requirements ...of society for music education professional talents training in the new period, this paper proposes an improved talent training model based on the ADDIE model by studying the current situation of music education professional talents training from the perspective of adapting to the development needs of music curriculum reform in basic education. From the assessment of students’ and teachers’ evaluation and acceptance of the model, the mean value of students’ evaluation scores increased from 64.7 to 75.7 compared with the original training model, an increase of 17.00%. The mean teacher evaluation score increased from 67.0 to 72.7, an increase of 8.51%. It is evident that the talent development model has improved and is accepted by students and teachers. In terms of the acceptance of the training model proposed in this paper, the percentage of students who strongly agree with it has increased by 19.8%, the percentage of students who can accept it has increased by 20.2%, and the percentage of students who cannot adapt to the teaching model has decreased by 6.1 percentage points, with a comparative decrease of 20.3%. Teachers were also more accepting of the new training model, and the percentage of those who could accept it increased by 5.3 percentage points and 7.17% in comparison. In conclusion, the talent cultivation model of music education based on the ADDIE model can be well adapted to the teaching classroom of colleges and universities and also meets the needs of the country and society for music teachers in the new era, which is conducive to the cultivation of composite talents who are highly educated and have a solid theoretical foundation and excellent practical ability.
Abstract
The discovery of moiré superlattices (MSLs) opened an era in the research of ‘twistronics’. Engineering MSLs and realizing unique emergent properties are key challenges. Herein, we ...demonstrate an effective synthetic strategy to fabricate MSLs based on mechanical flexibility of WS
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nanobelts by a facile one-step hydrothermal method. Unlike previous MSLs typically created through stacking monolayers together with complicated method, WS
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MSLs reported here could be obtained directly during synthesis of nanobelts driven by the mechanical instability. Emergent properties are found including superior conductivity, special superaerophobicity and superhydrophilicity, and strongly enhanced electro-catalytic activity when we apply ‘twistronics’ to the field of catalytic hydrogen production. Theoretical calculations show that such excellent catalytic performance could be attributed to a closer to thermoneutral hydrogen adsorption free energy value of twisted bilayers active sites. Our findings provide an exciting opportunity to design advanced WS
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catalysts through moiré superlattice engineering based on mechanical flexibility.
Higher strength is always the goal pursued by researchers for the structural materials, especially for the lightweight magnesium (Mg) alloys which generally have relatively low strength at present. ...From this aspect, the present paper reviews the recent reports of a kind of Mg alloys, i.e. Mg-RE (RE: rare earths, mainly Gd or Y) casting and wrought alloys, which have been able to achieve high strength compared with common or commercial Mg alloys, from the viewpoint and content of the alloy system, alloying constitution, preparation process, tensile strength and each of the main strengthening mechanisms. This review of recent research and developments in high-strength Mg-RE alloys is beneficial for the further design of Mg alloys with higher strength as well as excellent comprehensive performance.
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•A broad overview of ultrathin two-dimensional metal-organic frameworks materials for functional electronic devices.•An exhaustive summary of the preparative techniques for ...fabrication of ultrathin two-dimensional metal-organic frameworks.•A demonstration of the device performance enhanced by the active ultrathin two-dimensional metal-organic frameworks.
Ultrathin two-dimensional (2D) metal-organic framework (MOF) nanosheets with dimension-related chemical and physical properties, including large surface areas, high intrinsic porosities and abundant accessible active sites have attracted extensive interest in various functional electronic devices. In this review, we first introduce the special advantages of the ultrathin 2D MOF nanosheets. Then, we discuss the classifications of typical synthetic methods, such as top-down method and bottom-up method. Subsequently, we summarize the research advances on the applications of ultrathin 2D MOFs for functional electronic devices, including battery, supercapacitor, chemiresistive sensor, capacitive sensor, amperometric sensor, luminescent sensor, field effect transistor and white light-emitting diode, etc. Finally, we provide the challenges and perspectives on future synthesis and extensive applications of ultrathin 2D MOF nanosheets.
Due to the characteristics of optical rotation, selective emission of polarized light, and circular dichroism, circularly polarized luminescent materials have aroused extensive attentions, and they ...have exhibited wide optoelectronic applications, such as optical data storage, liquid crystal display, and backlights in 3D displays. Here, the research progress of circularly polarized luminescent materials for organic optoelectronic devices is summarized. First, the definition and measurement of the circularly polarized light, such as optical rotatory dispersion, circular dichroism, and circularly polarized luminescence, are systematically introduced. Subsequently, the design strategies for various kinds of circularly polarized luminescent materials, including luminescent lanthanide and transition‐metal complexes, small organic luminophores, conjugated polymers, supramolecules, and liquid crystals are summarized. These materials exhibit circularly polarized luminescence with different magnitudes of luminescence dissymmetry values (glum). They are further applied in optoelectronic devices with excellent performance, and the influence factors on the glum values of these materials are presented in detail. Finally, the current opportunities and challenges in this rapidly growing research field are discussed systematically. The circularly polarized luminescent materials with large glum and high luminescence efficiency are very promising for applications in organic optoelectronic fields.
Recent progress on circularly polarized luminescent materials for optoelectronic devices is systematically summarized. These materials, including metal complexes, organic luminophores, conjugated polymers, supramolecules, and liquid crystals, exhibit circularly polarized luminescence with different magnitudes of g values and are applied in optoelectronic devices with excellent performance. Finally, the current challenges and future directions in this rapidly growing field are proposed.
Organelle‐targeted photosensitizers have been reported to be effective photodynamic therapy (PDT) agents. In this work, we designed and synthesized two iridium(III) complexes that specifically stain ...the mitochondria and lysosomes of living cells, respectively. Both complexes exhibited long‐lived phosphorescence, which is sensitive to oxygen quenching. The photocytotoxicity of the complexes was evaluated under normoxic and hypoxic conditions. The results showed that HeLa cells treated with the mitochondria‐targeted complex maintained a slower respiration rate, leading to a higher intracellular oxygen level under hypoxia. As a result, this complex exhibited an improved PDT effect compared to the lysosome‐targeted complex, especially under hypoxia conditions, suggestive of a higher practicable potential of mitochondria‐targeted PDT agents in cancer therapy.
Two IrIII complexes, Ir‐P(ph)3 and Ir‐alkyl, were designed and synthesized to evaluate the mitochondria‐ and lysosome‐targeted PDT effect under normoxic and hypoxic conditions. As Ir‐P(ph)3‐treated cells could maintain a relatively high mitochondrial oxygen content under hypoxia, the mitochondria‐targeted complex Ir‐P(ph)3 showed a superior PDT effect than lysosome‐targeted complex Ir‐alkyl.
Great progress has been made in the development of various organic persistent luminescent (OPL) materials in the past few years, and increasing attention has been paid to their interesting ...applications in environmental sensing due to their long emission lifetimes and high sensitivity. Especially, the introduction of different halogen elements facilitates highly efficient OPL emission with distinct lifetimes and colours. In this review, we summarize the current status of the halide-containing OPL materials for environmental sensing applications. To begin with, the photophysical processes and luminescence mechanisms of OPL materials are expounded in detail to better understand the relationship among molecular structures, OPL properties, and sensing applications. Then, representative halide-containing material systems, such as small molecules, polymers, and doping systems, are summarized with their interesting applications in sensing temperature, oxygen, H
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O, UV light and organic solvents. In addition, several challenges and future research opportunities in this field are discussed. This review aims to provide some reasonable guidance on the material design of OPL sensors and their practical applications, and tries to provide a new perspective on the application direction of organic optoelectronics.
This review presents a summary of the molecular design of halide-containing organic persistent luminescent materials, and their environmental sensing applications.
Circularly polarized light exhibits promising applications in future displays and photonic technologies. Circularly polarized luminescence (CPL) from chiral luminophores is an ideal approach to ...directly generating circularly polarized light, in which the energy loss induced by the circularly polarized filters can be reduced. Among various chiral luminophores, organic micro-/nano-structures have attracted increasing attention owing to the high quantum efficiency and luminescence dissymmetry factor. Herein, the recent progress of CPL from organic micro-/nano-structures is summarized. Firstly, the design principles of CPL-active organic micro-/nano-structures are expounded from the construction of micro-/nano-structure and the introduction of chirality. Based on these design principles, several typical organic micro-/nano-structures with CPL activity are introduced in detail, including self-assembly of small molecules, self-assembly of π-conjugated polymers, and self-assembly on micro-/nanoscale architectures. Subsequently, we discuss the external stimuli that can regulate CPL performance, including solvents, pH value, metal ions, mechanical force, and temperature. We also summarize the applications of CPL-active materials in organic light-emitting diodes, optical information processing, and chemical and biological sensing. Finally, the current challenges and prospects in this emerging field are presented. It is expected that this review will provide a guide for the design of excellent CPL-active materials.
Grain size control is very important for enhancing the electric properties of CaCu3Ti4O12 (CCTO) ceramics. The effect of grain sizes on the dielectric and non-ohmic properties of the CCTO ceramics ...was investigated. Firstly, CCTO precursor powders were synthesized by the sol-gel process. Then the CCTO ceramics with different grain sizes were obtained under the same condition by using the powders calcined at different temperature. The XRD patterns of the sintered CCTO ceramics show the cubic perovskite with pure CCTO phases. The SEM results indicate that the mean grain sizes range of the CCTO ceramics are about 2.03(±0.66) ∼ 9.02(±3.57) μm. The electrical properties of the CCTO ceramics demonstrate that the change of the grain size obviously affects the non-ohmic characteristics and dielectric properties. And the larger grain size is beneficial to enhance the dielectric constant (ε ≈ 3 × 104, at a frequency of 1k Hz), while the smaller grain size is beneficial to improve its breakdown field (Eb ≈ 6010 V/cm) and nonlinear coefficient (α ≈ 24), which can be explained by the barrier behavior of Schottky-type model and the grain boundary properties of the internal barrier layer capacitor (IBLC) model. This work may provide an effective way to design high dielectric constant and nonlinear coefficient CCTO materials from the viewpoint of controlling grain size through the preparation parameter of the powders.
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•CCTO precursor powders were synthesized by the sol-gel process.•The CCTO ceramic grain sizes increase with the calcination temperature increasing.•Grain size control is very important for enhancing the electric properties.•The larger grain size is beneficial to enhance the dielectric constant.•The smaller grain size is helpful to improve the non-ohmic characteristics.
Magnesium (Mg) alloys have received an increasing interest in the past two decades for their tremendous application potential. The strength and corrosion resistance levels of common Mg alloys are ...still relativity low, and especially they are to be improved simultaneously. The addition of rare earth (RE) to Mg alloys is believed to be beneficial for both the strength and corrosion resistance, and some RE-modified traditional Mg alloys have been studied and some new RE-containing Mg alloys have been developed by now. However, further simultaneous improvements in both strength and anti-corrosion require a better understanding of the behavior and mechanism of RE in Mg alloys. In this review, the common influence mechanisms of RE on mechanical and anti-corrosion properties of Mg alloys are summarized, and the latest research progress of RE-containing Mg alloys with simultaneously improved strength and corrosion resistance are introduced. It is demonstrated that the research on high-strength and high corrosion resistant RE-containing Mg alloys is still immature, and some opinions and suggestions are put forward for the synergetic improvement of the strength and corrosion resistance of Mg alloys, so as to contribute to the further development of Mg alloys with higher performance.
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