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摘要: The optimization of the drum structure is beneficial to improve the particle motion and mixing in rotary drums. In this work, two kinds of drum structures, Lacy cylinder drum (LC) and Lacy-lifters cylinder drum (LLC), are developed on the basic of cylinder drum to enhance the heat transfer area. The particle motion and mixing process are simulated by DEM method. Based on the grid independence and model validation, the contact number between particles and wall, particle velocity profile, thicknes关键词: Rotating drum;Drum structure;Particle velocity profile;Thickness of active layer;Particle mixing
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摘要: We report that the integration of filter membrane and Ca2Nb3O10 nanosheets (FM@CNO) UV photodetector (UV PD) shows high performance and excellent flexibility. The Ca2Nb3O10 nanosheets were prepared by a facile solid-state reaction and liquid exfoliation process. The Ca2Nb3O10 nanosheets can be integrated into the pores of a filter membrane via a simple vacuum filtration method. The FM@CNO UV PD shows high performance under 300 nm light illumination at 5 V bias, including high responsivity (0.08 关键词: UV photodetector;Ca;2;Nb;3;O;10; nanosheets;Filter membrane;Flexible
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Lu Yiping;Wu Xiaoxiang;Fu Zhenghong;Yang Qiankun;Zhang Yong;Liu Qiming;Li Tianxin;Tian Yanzhong;Tan Hua;Li Zhiming;Wang Tongmin;Li Tingju;
Journal of Materials Science & TechnologyVolume 126, Issue , 2022, PP 15-21
摘要: 3D printing of high-strength alloys enables efficient manufacturing of complex metallic components. Yet, the as-built parts are often characterized by unsatisfied ductility due to micro-defects, requiring additional heat treatment to optimize the structure before in-site applications. The post heat-processing, however, often changes the shape of the printed parts, deteriorating the quality of the printed components. In addition, many printed large-scale alloy parts with complex shapes are diffic
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摘要: The hydrogenation of N2 is critical for nitrogen reduction reaction (NRR) and heavily relies on weak van der Waals forces, which leads to sluggish N2 activation. Herein, we put forward a hydrogen-bonding (H-bonding) strategy to promote N2 hydrogenation via chemically anchoring tetrahedron molybdate ([MoO4]) moieties onto micropore-rich VN nanosheets (Mo-VN). In Mo-VN, monodispersed Mo atoms linked with three equivalent end-on oxygen atoms anchor in VN matrix through bridging oxygen with O─Mo─O─V关键词: Nitrogen reduction reaction (NRR);Hydrogen-bonding;Molybdate;VN;Chemical vapor deposition (CVD)
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摘要: Indium sulfide has been proved to be a high-capacity anode material for sodium-ion batteries, but severe volume changes and low electrical conductivity limit its practical electrochemical performance. Based on this, graphene (RGO)-loaded In2S3 nanosheets array composites (In2S3/RGO) are synthesized by a simple reflux method to enhance charge transfer and ion diffusion kinetics as well as the structural stability of electrodes. By optimizing the amount of RGO, In2S3/RGO exhibits a high specific c关键词: In;2;S;3;/RGO;Nanosheets array;Sodium-ion battery;Anode;Ultrahigh performance
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摘要: The devices would subject transient thermal shocks (TTS) during operation under extremely harsh conditions of nuclear fusion reactors, which inevitably exert significant impact on the microstructure and performance of structural materials. In this work, a reduced activation VCrFeTa0.2W0.2 high-entropy alloy (HEA) was developed by vacuum arc melting. The effects of electron beam induced TTS on its microstructure, microhardness, and corrosion properties were investigated. The results indicate that关键词: High-entropy alloy;Transient thermal shock;Microstructure;Corrosion resistance;Refined composite multiscale entropy
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摘要: To reveal homologous substitution and refined mechanisms, and improve mechanical properties, Ti42Al6Nb 2.5 CxTa alloys were prepared by arc melting. Element distribution, lamellar colony size, length-diameter radio of Ti2AlC phase, tensile properties, and the corresponding influence mechanism were studied. Results show that the relative contents of γ and Ti2AlC phase increase, the content of α2 phase decreases, when Ta content increases from 0 to 2.0 at%. The relative content of B2 phase increas关键词: TiAl alloy;B2 phase;Tensile property;Microstructure evolution;Element distribution
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摘要: Piezo-photocatalytic system of two-dimensional (2D) composite can make the utmost of light and mechanic energy to degrade the contaminant and renovate our environment. Herein, we report a Ti3C2 quantum dots (TCQDs) decoration strategy that fully activates the piezo-phototronic effect in the piezo-photocatalytic system, extending the piezoelectric field from the edge of the nanosheet to the whole. The edge piezoelectric effect generated by the vibration of BiOBr nanosheets is extended to entire n关键词: Piezo-photocatalytic system;Electron enrichment;Piezo-phototronic effect
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Jiang Zicong;Cheng Bei;Zhang Yong;Wageh S.;Al‐Ghamdi Ahmed A.;Yu Jiaguo;Wang Linxi;
Journal of Materials Science & TechnologyVolume 124, Issue , 2022, PP 193-201
摘要: Designing highly efficient photocatalyst for hydrogen peroxide (H2O2) production is an ideal strategy to avoid the shortcomings of traditional H2O2 production and to realize the conversion of solar energy to chemical energy. In this work, a step-scheme (S-scheme) heterojunction photocatalyst composed of ZnO and WO3 is carefully prepared by hydrothermal and calcination method for efficient photocatalytic H2O2 production. The ZW30 composite photocatalysts exhibit enhanced activity with the highest关键词: Photocatalysis;Hydrogen peroxide;Step-scheme heterojunction;O;2; reduction;Zinc oxide
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摘要: In order to accelerate the hydrogen absorption and desorption rates of hyper-eutectic Mg-Ni alloy, Mg85Ni15-xAgx (x = 0, 0.2, 0.4, 0.6) alloys were prepared and the results show that fishbone eutectic was formed without change of phase composition. It was found that Ag atoms were dissolved in fishbone eutectic Mg2Ni and the average cell parameters of Mg2Ni increase with the increase of Ag content. Owing to adjusting lattice parameters, the hydrogen absorption and desorption rates of Mg85Ni14.8Ag关键词: Mg-Ni alloys;Hydrogen storage;Solid solution;Hydrogen de-/absorption kinetics
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摘要: In recent years, transportation network companies have developed various services, such as express, ride-pooling, premium service and app-based taxi hailing service, to satisfy the diversified travel demands of residents. However, the existing knowledge on the factors that affect the choice of different ride-hailing services remains scarce, and the difference of this impact between the users with and without household vehicles (HVs) has been little examined. To fill these gaps, the goal of this 关键词: Express;Ride-pooling;Premium service;App-based taxi hailing service;Household vehicle;Influential factors
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摘要: In this study, a signal-on type PEC immunosensor was constructed to detect neuron-specific enolase (NSE) via Z-scheme WO3/NiCo2O4 p-n heterojunction with cactus-like structure used as photoactive materials and MnxCd1-xS⊃Au NPs (MCS⊃Au NPs) as signal labels. Firstly, Z-scheme WO3/NiCo2O4 heterojunction could accelerate the separation efficiency of carriers and well-matched photoactive materials may promote charge migration, which resulted in WO3/NiCo2O4 generating strong and stable current. In ad关键词: Signal amplification;PEC immunosensor;WO;3;/NiCo;2;O;4;Z-Scheme p-n heterojunction;Mn;x;Cd;1-x;S⊃Au NPs
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摘要: This paper studies the local bifurcation direction, stability properties and global structure for a nonlinear pseudodifferential equation, which describes the periodic travelling gravity waves at the free surface of water in a flow of constant vorticity over a flat bed. We first obtain the precise formula of the second derivative of bifurcation parameters at the bifurcation points. In particular, their signs can be strictly judged when constant vorticity vanishes. Furthermore, we present the sta关键词: 35B32;35Q30;76B15;Bifurcation;Stokes wave;Constant vorticity;Stability properties AMS subjection
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摘要: Multi-principal element alloys exhibit excellent physical, chemical and mechanical properties, and they are used as novel structural materials for potential applications in nuclear energy, hydrogen energy, and petrochemical fields. However, exposing components made of the alloys to service conditions related to the mentioned applications may induce hydrogen embrittlement (HE) as one of the typical failure mechanisms. In this review, we report and summarize the progress in understanding HE in mul关键词: Hydrogen embrittlement;High-entropy alloy;Hydrogen diffusion;Mechanical property
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摘要: Generally, it is difficult to establish an accurate building load forecasting model by using insufficient energy data. Although the transfer of knowledge from similar buildings can effectively solve this problem, there is still a lack of effective methods for both the selection of source domain buildings and the use of transfer knowledge when many candidate buildings are available. In view of this, this paper proposes a multi-source transfer learning guided ensemble LSTM method for building mult关键词: Building load forecasting;Transfer learning;Multi-source;LSTM
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摘要: Transition metal dichalcogenides (TMDs) have been received widespread attention for NO2 detection at room temperature. However, the TMDs-based gas sensors usually possess inferior response capability and suffer from humidity interference due to lack of sufficient reaction activation energy, which seems tough to achieve the detection of ppb-level gases and hinder the practical applications. Herein, we propose a visible light-assisted-type gas sensor based on Au-decorated WS2, endowing high-perfor关键词: Visible-light-assisted gas sensor;Anti-humidity ability;Au/WS;2; composite;Localized surface plasmon resonance;Trace NO;2; detection
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摘要: R1216 (1,1,2,3,3,3-hexafluoro-1-propene), which has a low global warming potential, is regarded as the new generation of environmentally friendly working fluid in ORCs (organic Rankine cycle) and refrigeration systems. Besides, it also has the advantage of nonflammable property. Thus, R1216 can be mixed with some flammable working fluids to develop new mixed alternatives, which can possess a combination of chemical, environmental, thermodynamic, and safety properties. In this work, the flammabil关键词: Working fluid;R1216;Low GWP flammable fluid;Flammability limit;Inhibition
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摘要: Metal nanostructures with high atom utilization, abundant active sites, and special electron structures should be beneficial to the electrochemical monitoring of hydroquinone (HQ), a highly toxic environmental pollutant. However, traditional nanostructures, especially non-noble metals generally suffer from severe aggregation, or consist of a mixture of nanoparticles and nanoclusters, resulting in low detection sensitivity. Herein, we precisely control the size of Mo-based nanostructures spanning关键词: Multiscale levels;Mo-based nanostructures;Mo single atoms;Hydroquinone determination
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摘要: Federated learning-based network intrusion detection system (FL-based NIDS) has demonstrated tremendous potential in protecting the security of IoT network. It enables learning an effective intrusion detection model from massive traffic data collaboratively without data privacy leakage. However, FL-based NIDS has exhibited inherent vulnerabilities on the poisoning attacks launched by malicious clients. The poisoning attacks aim to corrupt the intrusion detection model and impair its protection c关键词: Network intrusion detection;Federated learning;Poisoning attacks;Defensive mechanism;Poisoned model detection;Poisoned data detection
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摘要: Membrane distillation (MD) for brackish groundwater desalination is a promising approach for alleviating water shortage in rural area. Conventional MD has very low single-pass water recovery leading to high energy consumption for hydraulic circulation. Heating the feed via electrothermal membrane at the interface diminishes the energy consumption for circulation, but the heat loss to the bulk feed and ambient environment critically needs to be managed to achieve higher Joule heat efficiency. An 关键词: Hydrophobic membrane;Fluoride;Drinking water;Energy efficiency;Single-pass water recovery
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摘要: The cladding layers of TiC particle reinforced Fe matrix composite was fabricated by pre-placed powder laser cladding. The clad height, width, dilution rate, hardness, content of unmelted TiC particles and porosity were selected as response. The effects of process parameters, especially the shielding gas flow rate which has received less attention so far, on the response were investigated by analysis of variance (ANOVA) based on L25(53) Taguchi orthogonal experimental design. It was f关键词: Laser cladding;Taguchi method;Grey relational analysis;Process optimization;304 stainless steel;TiC particle reinforced Fe matrix composite
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摘要: Perovskite light-emitting diodes (PeLEDs) as the next-generation display have been attracting wide attention due to high color purity, high photoluminescence quantum-yields (PLQYs), and easily tunable bandgap. Perovskite film quality has been being a fatal factor influencing electroluminescence (EL) performance of PeLEDs. The big pinholes and high roughness in the pristine CsPbBr3 perovskite film cause severely leakage current. In addition, the low PLQY indicates that the perovskite film retains关键词: CsPbBr;3;PEABr;BTPPC;Perovskite;Light-emitting diodes
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Fan Xiaogen;Jia Dong;Wang Hongbin;Chen Zhuxin;Yin Hongwei;Zhang Yong;Sun Chuang;Cui Jian;Yang Shuang;Zhong Cheng;Ge Jiacheng;
Journal of Asian Earth SciencesVolume 235, Issue , 2022, PP
摘要: The strength and rheology of the lithosphere are critical factors controlling strain concentration and partitioning, and hence affect the deformation propagation sequence of thrust belts. In this study, we used analogue experiments consisting of materials with different mechanical properties to model strength heterogeneity and investigate the specific impact of lithosphere heterogeneity on the structural evolution sequence of thrust belts. The results showed that the structural evolution sequenc关键词: Strength heterogeneity;Analogue experiment;Particle image velocimetry analysis;Evolution sequence
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摘要: Lithium is considered to be the “holy grail” for the application of energy storage due to its highest theoretical capacity and lowest anode potential. However, one of the grand difficulties in the development of lithium-based batteries is the lithium dendrite growth that leads to capacity fading and electrode degradation over long-term cycling. Compared with conventional electrolyte modifications, artificial solid electrolyte interfaces (SEI) synthesis and framework designing approaches, tuning 关键词: Lithium dendrite;Steps/edges;Active sites;Compression
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摘要: Introducing hierarchical microstructure on the soft material surface can effectively improve the sensitivity of the pressure sensor, however, the high sensitivity generates only at a low pressure range because of the limited compressibility of the microstructure and the incompressibility of the soft matrix. Herein, we first report a facile strategy of bioinspired engineering of hierarchical and gradient structures that can simultaneously improve the sensitivity and broaden the pressure working r关键词: Flexible electronics;Pressure sensors;Biomimetic structure;Porous nanocomposites
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摘要: The analysis of factors influencing urban rail transit (URT) passenger flow is often a precondition for establishing prediction models. Much past analysis has focused on correlation analysis and does not draw on research on causal mechanisms. In this paper, a novel causal inference method based on transfer information entropy (TIE) is proposed to determine the causality between influence factor and URT passenger flow. As a comparison, the matrix correlation coefficient (RV2 coefficien
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摘要: Nitrogen loss during composting is closely related to NH4+-N conversion, and ammonia-oxidizing bacteria (AOB) are important microorganisms that promote NH4+-N conversion. Since the biological activity of conventional AOB agents used for compost inoculation declines rapidly during the thermophilic phase of composting, new compound inoculants should be developed that are active during that phase. In the current study, the effects of inoculating cattle manure compost with newl关键词: Ammonia-oxidizing bacteria;Nitrogen conservation;Microbial community;Cattle manure;Composting
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摘要: A high-throughput technique can realize fast and efficient material screening, and greatly improve the discovery efficiency of advanced materials. In the present work, the gradient composition films of the W-Ta-CrFeNi high-entropy alloy were prepared by the three-target magnetron co-sputtering technique. The gradient alloy films exhibited a body-center-cubic (BCC) structure near the W or Ta element target, and an amorphous structure near the CrFeNi target region. Considering the effect of the un关键词: Compositional gradient high-entropy films;Nanoindentation hardness;Elastic modulus;Composition design;High-throughput technique;Phase-formation rules
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摘要: The 85°E Ridge is a prominent linear structure in the northeastern Indian Ocean. Its nature and origin are still controversial due to the coverage of thick Bengal Fan sediments. Here we present a newly collected 400-km-long 2-D seismic reflection profile which crosses the 85°E Ridge near 11°N and shows the basement morphology and internal structures of the ridge. The ridge has a thickened crust characterized by two basement highs rising up to ~2–3 km above the surrounding oceanic crust and a Moh关键词: 85°E Ridge;Leaky fracture zone;Hotspot volcanism;Crustal structure;Seismic reflection
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摘要: Accurate prediction of gas concentration is of great importance in many safe-based systems and applications. However, prediction accuracy of gas concentration is limited by not only the temporal evolution of gas concentration but also the spatial characteristics of gas dispersion. To capture the spatial and temporal dependences simultaneously, an evolutionary attention-based temporal graph convolutional network (EAT-GCN) is proposed, which has three outstanding features: (1) graph convolutional 关键词: Prediction of gas concentration;Graph convolutional network;Evolutionary attention;Spatiotemporal dependence;Gas distribution map
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