With the growth of exponential data, disk data storage is becoming increasingly important. In the storage system, single-disk and dual-disk loss are more and more serious. To ensure the efficiency and speed of data re...
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Particle motion regime and enrichment behavior of dense granular impinging-jets formed by the nozzle with rectangular orifice are experimentally and numerically *** impingement patterns are identified,including long a...
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Particle motion regime and enrichment behavior of dense granular impinging-jets formed by the nozzle with rectangular orifice are experimentally and numerically *** impingement patterns are identified,including long and short parallel *** enrich in the central axis of the granular sheet when two jets impinge with the long axes parallel *** at the short axes parallel pattern,particles generate two symmetrical enriched *** angle of particle-enriched streams is observed to increase with increasing angle of two impinging-jets and decreasing aspect ratio of the nozzle *** particle image velocity(PIV)analysis results demonstrate that the circumferential distribution of the particle velocity on the granular sheet follows the Gaussian *** the formation of particle-enriched streams,the concentration distribution of the particle evolves into a trimodal *** of the discrete element method(DEM)indicate that the core region with low velocity within the impact zone of impinging-jets generated by using two nozzles with rectangular orifices extends into a shuttle *** core region develops and extends along the horizontal(or vertical)directions at long(or short)axes impingement pattern,thereby,affecting the enrichment behavior of particles.
Behavior-Driven development (BDD) user stories are widely used in agile methods for capturing user requirements and acceptance criteria due to their simplicity and clarity. However, the concise structure of BDD-based ...
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In distributed storage systems, erasure codes are widely used to ensure data reliability and provide higher storage efficiency than replication techniques. However, the cost of using erasure codes is the increased net...
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Carbonyl small molecule compounds hold great potential as cathode materials for alkali-ion batteries（AIBs） due to their environmental friendliness, structural designability, and high theoretical capacity. However, i...
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Carbonyl small molecule compounds hold great potential as cathode materials for alkali-ion batteries（AIBs） due to their environmental friendliness, structural designability, and high theoretical capacity. However, it's practical application is hindered by intrinsic drawbacks, such as low electrical conductivity and high solubility in organic electrolytes. Additionally, most carbonyl small molecule cathodes can't be charged first in half-cells due to the absence of detachable Li+/Na+/K+ions, diminishing their appeal when assembled into full cells with alkali-free anodes. This review provides a detailed overview of carbonyl-contained small molecule cathode materials centered around oxygen, including their charge storage mechanisms, solutions to overcome their drawbacks, and the latest research advancements in AIBs. This review also summarizes the electrochemical performance of carbonyl small molecules as cathodes that have been assembled in batteries. Finally, the review outlines the prospects and directions for future research on carbonyl small molecule cathodes. It is hoped that this review will offer meaningful guidance for the development of carbonyl small-molecule cathode materials in AIBs.
Radiant syngas cooler(RSC)is widely used as a waste heat recovery equipment in industrial *** this work,an RSC with radiation screens is established and the impact of gaseous radiative property models,gas components,a...
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Radiant syngas cooler(RSC)is widely used as a waste heat recovery equipment in industrial *** this work,an RSC with radiation screens is established and the impact of gaseous radiative property models,gas components,and ash particles on heat transfer is investigated by the numerical simulation *** the syngas components and the pressure environment of the RSC,a modified weighted-sum-of-gray-gases model was *** modified model shows high accuracy in *** computational fluid dynamics simulation,the calculated steam production is only 0.63%in error with the industrial *** with Smith's model,the temperature decay along the axial direction calculated by the modified model is *** components are of great significance to heat recovery capacity,especially when the absorbing gas fraction is less than 10%.After considering the influence of particles,the outlet temperature and the proportion of radiative heat transfer are less affected,but the difference in steam output reaches 2.7 t·h^(-1).The particle deposition on the wall greatly reduces the heat recovery performance of an RSC.
With the rapid development of wearable electronic skin technology,flexible strain sensors have shown great application prospects in the fields of human motion and physiological signal detection,medical diagnostics,and...
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With the rapid development of wearable electronic skin technology,flexible strain sensors have shown great application prospects in the fields of human motion and physiological signal detection,medical diagnostics,and human-computer interaction owing to their outstanding sensing *** pa-per reports a strain sensor with synergistic conductive network,consisting of stable carbon nanotube dispersion(CNT)layer and brittle MXene layer by dip-coating and electrostatic self-assembly method,and breathable three-dimensional(3D)flexible substrate of thermoplastic polyurethane(TPU)fibrous membrane prepared through electrospinning *** MXene/CNT@PDA-TPU(MC@p-TPU)flexible strain sensor had excellent air permeability,wide operating range(0-450％),high sensitivity(Gauge Fac-tor,GF max=8089.7),ultra-low detection limit(0.05％),rapid response and recovery times(40 ms/60 ms),and excellent cycle stability and durability(10,000 cycles).Given its superior strain sensing capabilities,this sensor can be applied in physiological signals detection,human motion pattern recognition,and driv-ing exoskeleton *** addition,MC@p-TPU fibrous membrane also exhibited excellent photothermal conversion performance and can be used as a wearable photo-heater,which has far-reaching application potential in the photothermal therapy of human joint diseases.
作者：
Jing ZOUChang LIUKun XIANGQiong LIShihao DAIJizhou JIANGSchool of Chemistry and Environmental Engineering
School of Environmental Ecology and Biological EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China
Urea oxidation reaction(UOR)instead of anodic oxygen evolution reaction(OER)is considered an effective way to reduce energy consumption in electrocatalytic water splitting for hydrogen ***,the slow rate of reaction of...
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Urea oxidation reaction(UOR)instead of anodic oxygen evolution reaction(OER)is considered an effective way to reduce energy consumption in electrocatalytic water splitting for hydrogen ***,the slow rate of reaction of UOR,which entails a procedure of transferring six electrons,has hindered its widespread ***,it is crucial to design highly effective electrocatalysts for the implementation of ***,a novel NiCo-hydroxysulfide(NiCo-HOS)electrocatalyst has been reported for UOR,which is obtained by the exchange of sulfur ions in NiCo layered double hydroxide(NiCo-LDH)nanosheets at room *** from the sulfurization process,the composition,electronic structure,and surface properties of electrocatalysts have undergone significant changes and *** sulfurization treatment,the resulting NiCo-HOS showed enhanced chemical resistance to alkaline electrolytes and improved electrical *** a 40 h operation test,it maintained high stability and provided a stable current density of 100 mA cm^(-2)at a relatively low potential of 1.33 V(***)in a solution of 1 mol L^(-1)KOH+0.5 mol L^(-1)***,the anode electrolytic product is analyzed through gas chromatography(GC),and N_2 is detected as the product without the presence of CO,indicating that the urea has undergone complete oxidation.
MXenes—a kind of two-dimensional(2D) carbides, nitrides, oxycarbides and carbonitrides of early transition metals—have high mechanical and electrical properties and excellent photothermal conversion, biocompatibilit...
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MXenes—a kind of two-dimensional(2D) carbides, nitrides, oxycarbides and carbonitrides of early transition metals—have high mechanical and electrical properties and excellent photothermal conversion, biocompatibility and osteoinductivity [1–4].
Wearing a helmet is one of the effective measures to protect workers' safety. To address the challenges of severe occlusion, multi-scale, and small target issues in helmet detection, this paper proposes a helmet d...
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Wearing a helmet is one of the effective measures to protect workers' safety. To address the challenges of severe occlusion, multi-scale, and small target issues in helmet detection, this paper proposes a helmet detection algorithm based on deformable attention transformers. The main contributions of this paper are as follows. A compact end-to-end network architecture for safety helmet detection based on transformers is proposed. It cancels the computationally intensive transformer encoder module in the existing detection transformer(DETR) and uses the transformer decoder module directly on the output of feature extraction for query decoding, which effectively improves the efficiency of helmet detection. A novel feature extraction network named Swin transformer with deformable attention module(DSwin transformer) is proposed. By sparse cross-window attention, it enhances the contextual awareness of multi-scale features extracted by Swin transformer, and keeps high computational efficiency simultaneously. The proposed method generates the query reference points and query embeddings based on the joint prediction probabilities, and selects an appropriate number of decoding feature maps and sparse sampling points for query decoding, which further enhance the inference capability and processing speed. On the benchmark safety-helmet-wearing-dataset(SHWD), the proposed method achieves the average detection accuracy mAP@0.5 of 95.4% with 133.35G floating-point operations per second(FLOPs) and 20 frames per second(FPS), the state-of-the-art method for safety helmet detection.
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