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Rapid conversion of alkaline bauxite residue through co-pyrolysis with waste biomass and its revegetation potential

Journal of Environmental sciences 2023年第5期127卷 102-113页

作者： Yujun Wu Yufei Zhang Qihou Li Jun Jiang Yifan Jiang Shengguo Xue School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution Changsha 410083China

The extreme alkalinity of bauxite residue(BR)leads to difficulty with its *** leachate and dust generation during the stacking process can pollute surrounding soil,air and *** this work,co-pyrolysis of bauxite residue and sawdust was applied to rapidly produce a soil-like matrix that met the conditions for plant growth as demonstrated by ryegrass pot *** present study aimed to characterize the detailed changes in physicochemical,mineral weathering,and microbial communities of the pyrolyzed BR with different ratios of saw dust after plant colonization for 2 *** increasing sawdust addition during co-pyrolysis,the pH of BR decreased from 11.21 to 8.16,the fraction of macro-aggregates 0.25-2 mm in the water-stable agglomerates increased by 29.3%,and the organic carbon concentration increased from 12.5 to 320 mg/kg,whilst facilitating the degree of humification,which were all beneficial to its revegetation *** backscattered electron-scanning electron microscope-energy-dispersive X-ray spectrometry(BSE-SEM-EDS)results confirmed the occurrence of sodalite and calcite weathering on aggregate surfaces,and X-ray photoelectron spectroscopy(XPS)results of surface Al and Si compounds identified that some weathering products were clay minerals such as ***,bacterial community composition and structure shifted towards typical soil taxonomic *** results demonstrate soil development of treated BR at an early *** technique is a combination of alkalinity regulation and agglomerate construction,which accelerates soil formation of BR,thus proving highly promising for potential application as an artificial soil substitute.

关键词： Bauxite residue Waste sawdust Co-pyrolysis Resource reuse Soil formation

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Mucus-penetrating nonviral gene vaccine processed in the epithelium for inducing advanced vaginal mucosal immune responses

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Acta Pharmaceutica Sinica B 2023年第3期13卷 1287-1302页

作者： Qunjie Bi Xu Song Yangyang Zhao Xueyi Hu Huan Yang Rongrong Jin Yu Nie National Engineering Research Center for Biomaterials College of Biomedical EngineeringSichuan UniversityChengdu 610041China NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterial&Institute of Regulatory Science for Medical Devices&NMPA Research Base of Regulatory Science for Medical Devices Sichuan UniversityChengdu 610041China

Establishment of vaginal immune defenses at the mucosal interface layer through gene vaccines promise to prevent infectious diseases among *** barriers composed of a flowing mucus hydrogel and tightly conjugated epithelial cells(ECs),which represent the main technical difficulties for vaccine development,reside in the harsh,acidic human vaginal *** from frequently employed viral vectors,two types of nonviral nanocarriers were designed to concurrently overcome the barriers and induce immune *** design concepts include the charge-reversal property(DRLS)to mimic a virus that uses any cells as factories,as well as the addition of a hyaluronic acid coating(HA/RLS)to directly target dendritic cells(DCs).With a suitable size and electrostatic neutrality,these two nanoparticles penetrate a mucus hydrogel with similar *** DRLS system expressed a higher level of the carried human papillomavirus type 16 L1 gene compared to HA/RLS in *** it induced more robust mucosal,cellular,and humoral immune ***,the DLRS applied to intravaginal immunization induced high IgA levels compared with intramuscularly injected DNA(naked),indicating timely protection against pathogens at the mucus *** findings also offer important approaches for the design and fabrication of nonviral gene vaccines in other mucosal systems.

关键词： Intravaginal gene delivery Nonviral gene vaccination Mucus penetration Epithelial processing Lipopeptide pH-sensitive Virus mimicking

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Floating periodic pontoons for broad bandgaps of water waves

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Applied Mathematics and Mechanics(English Edition) 2024年第11期45卷 1913-1928页

作者： Huaqing JIN Haicheng ZHANG Ye LU Daolin XU College of Mechanical and Vehicle Engineering Hunan UniversityChangsha410082China Wuxi lntelligent Control Research Institute Hunan UniversityWuxi214000Jiangsu ProvinceChina China Ship Scientific Research Center Wuxi214082Jiangsu ProvinceChina

The narrow attenuation bands of traditional marine structures have long been a challenge in mitigating water *** this paper,a metastructure(MS)composed of floating periodic pontoons is proposed for broadband water wave *** interaction of surface gravity waves with the MS is investigated using linear wave *** potential solutions of water waves by the MS with a finite array are developed by using the eigenfunction expansion matching method(EEMM),and the band structure of the MS is calculated by the transfer matrix method(TMM),in which the evanescent modes of waves are *** solution is verified against the existing numerical result for a special *** on the present solution,the association between Bragg resonance reflection and Bloch bandgaps is examined,the effects of pontoon geometry are analyzed,and the comparison between floating MS and bottom-mounted periodic structures is conducted.A computational fluid dynamics(CFD)model is further developed to assess the structures in practical fluid environments,and the floating MS presents excellent wave attenuation *** study presented here may provide a promising solution for protecting the coast and offshore structures.

关键词： floating metastructure(MS) wave attenuation bandgap analytical method

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Air target recognition method against ISRJ for radio frequency proximity sensors using chaotic stream encryption

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Defence Technology（防务技术） 2023年第10期28卷 267-279页

作者： Jian-feng Li Jian Dai Xin-hong Hao Xiao-peng Yan Xin-wei Wang Science and Technology on Electromechanical Dynamic Control Laboratory School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing100081China BIT Tangshan Research Institute Beijing100081China

The interrupted-sampling repeater jamming(ISRJ)can cause false targets to the radio-frequency proximity sensors(RFPSs),resulting in a serious decline in the target detection capability of the *** article proposes a recognition method for RFPSs to identify the false targets caused by *** proposed method is realized by assigning a unique identity(ID)to each RFPS,and each ID is a periodically and chaotically encrypted in every pulse *** processing technique of the received signal is divided into ranging and ID *** the ranging part,a high-resolution range profile(HRRP)can be obtained by performing pulse compression with the binary chaotic *** suppress the noise,the singular value decomposition(SVD)is applied in the *** ID decryption,targets and ISRJ can be recognized through the encryption and decryption processes,which are controlled by random *** adaptability analysis conducted in terms of the peak-to-side lobe ratio(PSLR)and bit error rate(BER)indicates that the proposed method performs well within a 70-k Hz Doppler shift.A simulation and experimental results show that the proposed method achieves extremely stable target and ISRJ recognition accuracies at different signal-to-noise ratios(SNRs)and jamming-to-signal ratios(JSRs).

关键词： Interrupted-sampling repeater jamming(ISRJ) Radio frequency proximity sensors(RFPS) Chaotic stream encryption Air target recognition Identity(ID)decryption

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Special Vehicle Target Detection and Tracking Based on Virtual Simulation Environment and YOLOv5-Block+DeepSort Algorithm

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Computers, Materials & Continua 2024年第11期81卷 3241-3260页

作者： Mingyuan Zhai Hanquan Zhang Le Wang Dong Xiao Zhengmin Gu Zhenni Li College of Information Science and Engineering Northeastern UniversityShenyang110819China Flight Control Department Shenyang Aircraft Design and Research InstituteShenyang110035China Department of Information Center The First Hospital of China Medical UniversityShenyang110001China

In the process of dense vehicles traveling fast,there will be mutual occlusion between vehicles,which will lead to the problem of deterioration of the tracking effect of different vehicles,so this paper proposes a research method of virtual simulation video vehicle target tracking based on you only look once(YOLO)v5s and deep simple online and realtime tracking(DeepSort).Given that the DeepSort algorithm is currently the most effective tracking method,this paper merges the YOLOv5 algorithm with the DeepSort *** it adds the efficient channel attention networks(ECA-Net)focusing mechanism at the back for the cross-stage partial bottleneck with 3 convolutions(C3)modules about the YOLOv5 backbone network and before the up-sampling of the Neck feature *** YOLOv5 algorithm adopts expected intersection over union(EIOU)instead of complete intersection over union(CIOU)as the loss function of the target frame *** improved YOLOv5 algorithm is named *** experimental results show that in the special vehicle target detection(TD)and tracking in the virtual simulation environment,The YOLOv5-Block algorithm has an average accuracy(AP)of 99.5%,which significantly improves the target recognition correctness for typical occlusion cases,and is 1.48 times better than the baseline *** the virtual simulation video sequence test,multiple objects tracking accuracy(MOTA)and various objects tracking precision(MOTP)improved by 10.7 and 1.75 percentage points,respectively,and the number of vehicle target identity document(ID)switches *** with recent mainstream vehicle detection and tracking models,the YOLOv5-Block+Deepsort algorithm can accurately and continuously complete the detection and tracking tasks of special vehicle targets in different scenes.

关键词： YOLOv5 DeepSort virtual simulation attention mechanism

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Experimental investigation of methane explosion fracturing in bedding shales:Load characteristics and three-dimensional fracture propagation

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International Journal of Mining science and Technology 2024年第10期34卷 1365-1383页

作者： Yu Wang Cheng Zhai Ting Liu Jizhao Xu Wei Tang Yangfeng Zheng Xinyu Zhu Ning Luo School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China National Engineering Research Center for Coal Gas Control China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Coal Mine Disaster Prevention and Control China University of Mining and TechnologyXuzhou 221116China School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 221116China

Methane in-situ explosion fracturing(MISEF)enhances permeability in shale reservoirs by detonating desorbed methane to generate detonation waves in *** propagation in bedding shale under varying explosion loads remains *** this study,prefabricated perforated shale samples with parallel and vertical bedding are fractured under five distinct explosion loads using a MISEF experimental ***-frequency explosion pressure-time curves were monitored within an equivalent perforation,and computed tomography scanning along with three-dimensional reconstruction techniques were used to investigate fracture propagation ***,the formation mechanism and influencing factors of explosion crack-generated fines(CGF)were clarified by analyzing the morphology and statistics of explosion debris *** results indicate that methane explosion generated oscillating-pulse loads within *** characteristic parameters increase with increasing initial *** load and bedding orientation significantly influence fracture propagation *** initial pressure increases,the fracture mode transitions from bi-wing to 4–5 radial *** parallel bedding shale,radial fractures noticeably deflect along the bedding *** bedding facilitates the development of transverse fractures oriented parallel to the ***-merging of explosioninduced fractures generated *** mass and fractal dimension increase,while average particle size decreases with increasing explosion *** study provides valuable insights into MISEF technology.

关键词： Methane in-situ explosion fracturing Bedding shale Fracture propagation Three-dimensional reconstruction Crack-generated fines Fractal dimension

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Investigation of conformational changes of cathepsin B as a feasibility assessment for NaCl reduction in Jinhua ham

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Food science and Human Wellness 2025年第2期14卷 429-438页

作者： Shiqi Hu Guanghong Zhou Xinglian Xu Wangang Zhang Chunbao Li Key Laboratory of Meat Processing and Quality Control Ministry of EducationKey Laboratory of Meat ProcessingMinistry of Agriculture and Rural AffairsJiangsu Synergetic Innovation Center of Meat Processing and Quality ControlCollege of Food Science and TechnologyNanjing Agricultural UniversityNanjing 210095China School of Life Science and Food Engineering Huaiyin Institute of TechnologyHuai’an 223003China

To regulate the sodium chloride content in Jinhua ham,the impact of NaCl on the activity and conformation of cathepsin B was investigated using spectroscopy and computational *** results showed that the activity of cathepsin B decreased with an increase in Na^(+)cation content and ***,decreasedα-helix content and increasedβ-sheet content were *** increase in sulfhydryl group content was attributed to the breaking of original disulfide bonds in the molecular structure or the release of embedded ***,the surface hydrophobicity gradually declined,which was consistent with the analysis of endogenous fluorescence *** the molecular level,the number of hydrogen bonds formed in NaCl-treated samples decreased,and the interactions between the hydrogen bonding were less powerful,which caused instability in the binding of the protein and *** conformation of cathepsin B accurately characterized its activity,and the structural changes had a macroscopic effect on the decrease in protease activity.

关键词： Protein conformation Cathepsin B activity Jinhua ham Molecular docking Molecular dynamics

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An Improved YOLOv5s-Based Smoke Detection System for Outdoor Parking Lots

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Computers, Materials & Continua 2024年第8期80卷 3333-3349页

作者： Ruobing Zuo Xiaohan Huang Xuguo Jiao Zhenyong Zhang State Key Laboratory of Public Big Data College of Computer Science and TechnologyGuizhou UniversityGuiyang550025China School of Information and Control Engineering Qingdao University of TechnologyQingdao266520China State Key Laboratory of Industrial Control Technology College of Control Science and EngineeringZhejiang UniversityHangzhou310027China Key Laboratory of Computing Power Network and Information Security Ministry of EducationQilu University of Technology(Shandong Academy of Sciences)Jinan250353China Text Computing&Cognitive Intelligence Engineering Research Center of National Education Ministry Guizhou UniversityGuiyang550025China

In the rapidly evolving urban landscape,outdoor parking lots have become an indispensable part of the city’s transportation *** growth of parking lots has raised the likelihood of spontaneous vehicle combus-tion,a significant safety hazard,making smoke detection an essential preventative ***,the complex environment of outdoor parking lots presents additional challenges for smoke detection,which necessitates the development of more advanced and reliable smoke detection *** paper addresses this concern and presents a novel smoke detection technique designed for the demanding environment of outdoor parking ***,we develop a novel dataset to fill the gap,as there is a lack of publicly available *** dataset encompasses a wide range of smoke and fire scenarios,enhanced with data augmentation to ensure robustness against diverse outdoor ***,we utilize an optimized YOLOv5s model,integrated with the Squeeze-and-Excitation Network(SENet)attention mechanism,to significantly improve detection accuracy while maintaining real-time processing ***,this paper implements an outdoor smoke detection system that is capable of accurately localizing and alerting in real time,enhancing the effectiveness and reliability of emergency *** show that the system has a high accuracy in terms of detecting smoke incidents in outdoor scenarios.

关键词： YOLOv5s smoke detection deep learning SENet

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Strong absorption in ultra-wide band by surface nano engineering of metallic glass

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Fundamental research 2025年第1期5卷 307-314页

作者： Jianan Fu Xin Li Zhen Li Fei Sun Wenxin Wen Jinlai Zhao Wenqing Ruan Shuai Ren Zhenxuan Zhang Xiong Liang Jiang Ma Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen 518060China

Broadband light absorption is important for applications such as infrared detectors,solar energy collectors,and photothermal *** propose a facile and common strategy to fabricate light absorbers with strong ultra-wideband *** to their excellent thermoplastic forming ability,metallic glasses could be patterned into finely arranged nanowire arrays,which show extremely low reflectivity(∼0.6%)in the visible and near-infrared regimes,and a low reflectivity(∼15%)in the mid-infrared regime as caused by multiscale nano spacing,multiple reflections,and plasmonic *** strong absorption at surfaces with nanowires provides excellent photothermal conversion *** photothermal properties show that a surface with nanowires can be rapidly heated up to∼160°C at a rate of 28.75°C/s,which is 30 times higher than smooth ***,a surface with nanowires shows a high photothermal conversion efficiency(η_(PT)=56.36%).The fabricated metallic glass absorbers exhibit adaptability as they can be easily formed into various complex shapes and meet the requirements under harsh *** outcomes of our research open the door to manufacturing high-performance absorbers for applications in photothermal electric power generation,desalination,and photodetectors.

关键词： Metallic glass Nanoforming Ultra-wideband absorption Photothermal properties Thermoplastic forming

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Revisiting the 'Problem' and Its Structure 4

Revisiting the 'Problem' and Its Structure

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4th International Conference on Technology Enhanced Learning in Higher Education, TELE 2024

作者： Rumovskaya, Sophiya The Federal Research Center 'Computer Science and Control' The Russian Academy of Sciences Kaliningrad Branch Kaliningrad Russia

ISBN: (纸本)9798350353532

Currently, we can see the significant variety of processed information and the unprecedented rate of increase in its volumes as well as the ambiguity of the assessment of situations, errors in the choice of priorities, and inconsistency of requirements. All of this contribute to the increasingly frequent emergence of situations with insufficiently identified or detected conditions and with an uncertain goal in various areas, namely, problems. Often problems are amorphous formations, without (or with partial) pre-assignment and formulation. It is urgent now to train future specialists, which will be able to identify problems, formulate them and overcome them within team working. Hence, the development of models and methods for identifying the structure of the problem is relevant either for education and training of future personnel or for researchers and developers of decision support systems regarding complex practical problems in social, economic, and production systems. The success of overcoming a problem depends on the quality of its formulation. The work discusses approaches to defining the concept of 'problem' as well as its structure. © 2024 IEEE.

关键词： features of problems problem structure of a problem systematic approach

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