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Data-driven mapping-relationship mining between hardness and mechanical properties of dual-phase titanium alloys via random forest and statistical analysis

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Rare Metals 2024年第2期43卷 829-841页

作者： Hai-chao Gong Qun-Bo Fan Hong-Mei Zhang Xing-Wang Cheng Wen-Qiang xie Kai Chen Lin Yang Jun-Jie Zhang Bing-Qiang Wei Shun Xu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China National Key Laboratory of Science and Technology on Materials Under Shock and Impact Beijing100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing401135China Department of Mechanical and Materials Engineering University of Nebraska-LincolnLincolnNE68588USA

In order to accelerate the research on the property optimization of titanium alloy based on high-throughput methods,it is necessary to reveal the relationship between hardness and other mechanical properties which is still *** this work,taking Ti20C alloy as research object,almost all the microstructure of dual-phase titanium alloys were covered by traversing over 100 heat treatment ***,massive experiments including microstructure characterization and performance test were conducted,obtaining 51,590 pieces of microstructure data and 3591 pieces of mechanical property ***,based on large-scale data-driven technology,the quantitative mapping relationship between hardness and other mechanical properties was deeply *** results of random forest models showed that the correlation between hardness(H)and Charpy impact energy(A_(k))(or elongation,A)was hardly dependent on the microstructure types,while the relationship between H and tensile strength(R_(m))(or yield strength,R_(p0.2))was highly dependent on microstructure ***,combined with statistical analysis,it was found that the relationship between H and Ak(or A)were negatively ***,the relationship between H and strength was positively linear for equiaxed microstructure,and strength was linked to d^(−1/2)(d,equivalent circle diameter)ofα-grains in the form of classical Hall–Petch formula;but for other microstructures,the relationships were ***,the above rules were nearly the same in the rolling direction and transverse ***,a"four-quadrant partition map"between H and R_(p0.2)/R_(m) was established as a versatile material-screening tool,which can provide guidance for on-demand selection of titanium alloys.

关键词： Dual-phase titanium alloy Data-driven Hardness Mapping relationship

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A study on the influencing factors of rural tourism promoting households'shared prosperity in Yinan County of Shandong Province

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Ecological Economy 2024年第1期20卷 72-84页

作者： YU feng xie Ai-liang School of Business Linyi UniversityLinyi 276005CHINA School of History and Culture Linyi UniversityLinyi 276005CHINA

This study examines the influencing factors of rural tourism in promoting shared prosperity among households,using the case study of Yinan County in Shandong province,*** research aims to provide insights into the economic benefits experienced by low-income households in the context of rural tourism *** on field research conducted from April 8,2023,to May 17,2023,including interviews and site visits,the study constructs an evaluation index system to assess the influencing *** expert scoring and the application of a weighted set-valued mathematical statistical model,the importance and quantification of each factor are *** results indicate that the current stage of promoting shared prosperity through rural tourism in Yinan County is primarily influenced by the scale of tourist consumption of external *** factor outweighs others such as the participation capacity and willingness of low-income households,the capacity of investment enterprises,and the policies and financial allocation of the local *** findings emphasize the significance of external visitor spending and highlight the need to address the obstacles faced by low-income households in accessing economic *** evaluation index system and measurement model presented in this study offer a scientific basis for assessing and improving the income situation of low-income households in rural tourism development ***,it is crucial to note that the importance of these influencing factors may evolve with the lifecycle of the tourism *** research should include long-term tracking and consider a broader range of indicators to deepen our understanding of their mechanisms and ***,alternative approaches and theories may provide valuable perspectives for further exploration in this field.

关键词： rural tourism households shared prosperity influencing factors economic benefits

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Review of the research on the development and utilization of clay-type lithium resources

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Particuology 2024年第4期87卷 46-53页

作者： Ruiqi xie Zhihui Zhao Xiong Tong Xian xie Qiang Song Peiqiang Fan Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming650093China Yunnan Engineering Research Center for Metal Tailings Resource Utilization Kunming650093China

Since the demands for lithium have been in explosive growth recently and several great clay lithium resources were founded in China,the development and utilization of clay-type lithium resources become a hot *** order to provide a guidance for the concentration and extracting lithium of clay-type lithium resources,this review systematically summarized the main types and characteristics of clay-type lithium resources and the research status of lithium extraction from clay lithium ***,the flotation research status of the main mineral of clay lithium ore was also ***,we discussed the difficulties in the development and utilization of clay-type lithium ore and put forward the subsequent research *** paper can provide a guidance for the con-centration and extracting lithium of clay-type lithium resources in the future.

关键词： Clay lithium Clay mineral flotation Lithium extraction Leaching

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Conductive and stable polyphenylene/CNT composite membrane for electrically enhanced membrane fouling mitigation

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 35-47页

作者： Huijuan xie Haiguang Zhang Xu Wang Gaoliang Wei Shuo Chen xie Quan Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Nanocarbon-based conductive membranes, especially carbon nanotube (CNT)-based membranes, have tremendous potential for wastewater treatment and water purification because of their excellent water permeability and selectivity, as well as their electrochemically enhanced performance (e.g., improved antifouling ability). However, it remains challenging to prepare CNT membranes with high structural stability and high electrical conductivity. In this study, a highly electroconductive and structurally stable polyphenylene/CNT (PP/CNT) composite membrane was prepared by electropolymerizing biphenyl on a CNT hollow fiber membrane. The PP/CNT membrane showed 3.4 and 5.0 times higher electrical conductivity than pure CNT and poly(vinyl alcohol)/CNT (PVA/CNT) membranes, respectively. The structural stability of the membrane was superior to that of the pure CNT membrane and comparable to that of the PVA/CNT membrane. The membrane fouling was significantly alleviated under an electrical assistance of −2.0 V, with a flux loss of only 11.7% after 5 h filtration of humic acid, which is significantly lower than those of PP/CNT membranes without electro-assistance (56.8%) and commercial polyvinylidene fluoride (PVDF) membranes (64.1%). Additionally, the rejection of negatively charged pollutants (humic acid and sodium alginate) was improved by the enhanced electrostatic repulsion. After four consecutive filtration-cleaning cycle tests, the flux recovery rate after backwashing reached 97.2%, which was much higher than those of electricity-free PP/CNT membranes (67.0%) and commercial PVDF membranes (61.1%). This study offers insights into the preparation of stable conductive membranes for membrane fouling control in potential water treatment applications.

关键词： Polyphenylene CNTs Membrane Electro-assistance Membrane fouling mitigation

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Extract lithium from clay-type lithium ore by mixed acid and its mechanism Author links open overlay panel

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Particuology 2024年第8期91卷 323-332页

作者： Wuchang Zhou Ruiqi xie Xiong Tong Xian xie Yang Liu Zhihui Zhao Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming650093China Technology Innovation Center for Comprehensive Utilization of Strategic Mineral Resources Ministry of Natural ResourcesChengdu610041China National&Regional Engineering Research Center for Green comprehensive Utilization of Tailing Resources from Metal Minerals Kunming650093China

A roasting-leaching test was carried out for the efficient utilization of clay-type lithium ore in the central region of Yunnan *** test used the mixed acid of sulfuric acid and phosphoric acid as the leaching *** the conditions of roasting temperature of 600℃,roasting time of 1 h,liquid-solid ratio of 5:1,volume ratio of H_(2)SO_(4)solution to H_(3)PO_(4)solution of 45:5,leaching time of 2 h and leaching temperature of 80℃,the leaching rate of lithium was as high as 97.83%.The leaching mechanism was studied by SEM,pore property analysis,XRD and *** was found that the morphology of the ore changed obviously after roasting and leaching,and a certain degree of collapse and fragmentation occurred,which provided favorable spatial conditions for the leaching of *** porosity,total intrusion volume and total pore area also increased after roasting and leaching,thus promoting the leaching of Li^(+).The results showed that chemical reaction taken placed during the roasting and *** phase of the sample changed from chlorite,kaolinite and diaspore(boehmite)mainly to corundum,hematite,periclase and quartz after ***,after leaching,no new phase was produced in the ore sample,and no S and P elements were found on the surface of the ore sample,indicating that the leaching mechanism of lithium might be the ion exchange between H^(+)and Li^(+).

关键词： Clay-type lithium ore Lithium extraction Roasting Leaching

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Game-theoretic multi-agent motion planning in a mixed environment

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Control Theory and Technology 2024年第3期22卷 379-393页

作者： Xiaoxue Zhang Lihua xie School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore City 639798Singapore

The motion planning problem for multi-agent systems becomes particularly challenging when humans or human-controlled robots are present in a mixed *** address this challenge,this paper presents an interaction-aware motion planning approach based on game theory in a receding-horizon manner Leveraging the framework provided by dynamic potential games for handling the interactions among agents,this approach formulates the multi-agent motion planning problem as a differential potential game,highlighting the effectiveness of constrained potential games in facilitating interactive motion planning among ***,online learning techniques are incorporated to dynamically learn the unknown preferences and models of humans or human-controlled robots through the analysis of observed *** evaluate the effectiveness of the proposed approach,numerical simulations are conducted,demonstrating its capability to generate interactive trajectories for all agents,including humans and human-controlled agents,operating within the mixed *** simulation results illustrate the effectiveness of the proposed approach in handling the complexities of multi-agent motion planning in real-world scenarios.

关键词： Motion planning Differential potential game Multi-agent systems Constrained potential game

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Dexmedetomidine ameliorates diabetic intestinal injury by promoting the polarization of M2 macrophages through the MMP23B pathway

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World Journal of Diabetes 2024年第9期15卷 1962-1978页

作者： Man Lu Xiao-Wen Guo Fang-Fang Zhang Dan-Hong Wu Di xie feng-Qin Luo Department of Anesthesiology The First Affiliated Hospital of Zhejiang Chinese Medical University(Zhejiang Provincial Hospital of Traditional Chinese Medicine)Hangzhou 310006Zhejiang ProvinceChina Department of Emergency Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China

BACKGROUND Diabetes is often associated with gastrointestinal dysfunctions,which can lead to ***(DEX)is a commonly used sedative in perioperative diabetic patients and may affect gastrointestinal *** To investigate whether sedative doses of DEX alleviate diabetes-caused intestinal *** Sedation/anesthesia scores and vital signs of streptozotocin(STZ)-induced diabetic mice under DEX sedation were *** mice were divided into saline and DEX *** injecting sedatives intraperitoneally,tight junctions(TJs)and apoptotic levels were evaluated 24 hours later to assess the intestinal barrier *** role of DEX was validated using Villin-MMP23B flox/flox mice with intestinal epithelial *** vitro,high glucose and hyperosmolarity were used to culture Caco-2 monolayer cells with STZ *** techniques were used to monitor the barrier and mitochondrial *** MMP23B protein levels in the intestinal tissue of STZ-induced diabetic mice were significantly higher than those in the intestinal tissue of control mice,with the DEX group displaying decreased MMP23B ***-mediated TJ disruption,increased intestinal mucosal permeability,and systemic inflammation in wild-type mice might be reversed by *** Caco-2 cells,MMP23B was associated with increased reactive oxygen species accumulation,mitochondrial membrane potential depolarization,and TJ *** DEX reduces MMP23B,which may potentially contribute to STZ-induced intestinal barrier dysfunction,affecting TJ modification through mitochondrial dysfunction.

关键词： Diabetes Dexmedetomidine Intestinal barrier Piezo1 Tight junctions

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Valorization of Camellia oleifera oil processing byproducts to value-added chemicals and biobased materials: A critical review

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Green Energy & Environment 2024年第1期9卷 28-53页

作者： Xudong Liu Yiying Wu Yang Gao Zhicheng Jiang Zicheng Zhao Wenquan Zeng Mingyu xie Sisi Liu Rukuan Liu Yan chao Suli Nie Aihua Zhang Changzhu Li Zhihong Xiao State Key Laboratory of Utilization of Woody Oil Resource Hunan Academy of ForestryChangsha410004China Key Laboratory of State Forestry and Grassland Administration on Utilization Science for Southern Woody Oil Resource Hunan Academy of ForestryChangsha410004China Hunan Provincial Key Laboratory of Oils and Fats Molecular Structure and Function Changsha410004China State Key Laboratory of Separation Membranes and Membrane Processes College of ChemistryTiangong UniversityTianjin300387China College of Biomass Science and Engineering Sichuan UniversityChengdu610065China College of Mechanical Engineering and Mechanics Xiangtan UniversityXiangtan411105China

The *** oil processing industry generates large amounts of solid wastes,including *** shell(COS)and *** cake(COC).Distinct from generally acknowledged lignocellulosic biomass(corn stover,bamboo,birch,etc.),Camellia wastes contain diverse bioactive substances in addition to the abundant lignocellulosic components,and thus,the bioreﬁnery utilization of *** processing byproducts involves complicated processing *** reviewﬁrst summarizes various technologies for extracting and converting the main components in *** oil processing byproducts into value-added chemicals and biobased materials,as well as their potential ***,ultrasound,and Soxhlet extractions are compared for the extraction of functional bioactive components(tannin,ﬂavonoid,saponin,etc.),while solvothermal conversion and pyrolysis are discussed for the conversion of lignocellulosic components into value-added *** application areas of these chemicals according to their properties are introduced in detail,including utilizing antioxidant and anti-in-ﬂammatory properties of the bioactive substances for the speciﬁc application,as well as drop-in chemicals for the substitution of unrenewable fossil fuel-derived *** addition to chemical production,biochar fabricated from COS and its applications in theﬁelds of adsorption,supercapacitor,soil remediation and wood composites are comprehensively reviewed and ***,based on the compositions and structural characteristics of *** byproducts,the development of full-component valorization strategies and the expansion of the appli-cationﬁelds are proposed.

关键词： Camellia oleifera shell Camellia oleifera cake Value-added chemicals Bioactive components Biobased materials

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Clinical practice guideline for acupuncture and moxibustion: Female urinary incontinence

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Journal of Integrative Medicine 2024年第3期22卷 258-269页

作者： chao Yang Shan-ze Wang Sheng Chen Shuo Du Guan-qun Wang Wei Guo Xiao-long xie Bi-hui Peng Shi-hao Du Ji-ping Zhao Department of Acupuncture and Moxibustion Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100700China Department of Acupuncture and Moxibustion Guangdong provincial hospital of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Shanghai Ninth People’s Hospital Shanghai Jiao Tong University School of MedicineShanghai 200011China Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijing 100700China

Urinary incontinence (UI) is a common problem *** has a major impact on physical and social activities and interpersonal *** is common in women,but is under-reported and *** affects the quality of life of female patients *** and moxibustion have been proposed as potentially effective interventions for female ***,for the benefit of acupuncture practitioners around the world,the World Federation of Acupuncture-moxibustion Societies initiated a project to develop a clinical practice guideline (CPG) for the use of acupuncture and moxibustion to treat female *** CPG was developed according to the Grading of Recommendations Assessment,Development,and Evaluation (GRADE) methodology,referring to the principles of the World Health Organization Handbook for Guideline *** the development of the CPG,the guideline development group (GDG) played an important *** clinical questions,recommendations and therapeutic protocols were all formulated by GDG using the modified Delphi *** CPG contains ten recommendations about the use of acupuncture and moxibustion interventions for ten clinical questions,which include nine conditional recommendations for the intervention and one conditional recommendation for either the intervention or the *** CPG also provides one protocol for conventional filiform needle therapy,two therapy protocols for deep needling stimulation on lumbosacral acupoints,and four moxibustion therapy protocols,based on the protocols presented in randomized controlled trials reviewed by the GDG.

关键词： Acupuncture Clinical practice guideline Female urinary incontinence Moxibustion GRADE

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Transfer learning framework for multi-scale crack type classification with sparse microseismic networks

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International Journal of Mining Science and Technology 2024年第2期34卷 167-178页

作者： Arnold Yuxuan xie Bing QLi Department of Civil and Environmental Engineering Western UniversityLondon N6A 3K7Canada

Rock fracture mechanisms can be inferred from moment tensors(MT)inverted from microseismic ***,MT can only be inverted for events whose waveforms are acquired across a network of *** is limiting for underground mines where the microseismic stations often lack azimuthal ***,there is a need for a method to invert fracture mechanisms using waveforms acquired by a sparse microseismic ***,we present a novel,multi-scale framework to classify whether a rock crack contracts or dilates based on a single *** framework consists of a deep learning model that is initially trained on 2400000+manually labelled field-scale seismic and microseismic waveforms acquired across 692 *** learning is then applied to fine-tune the model on 300000+MT-labelled labscale acoustic emission waveforms from 39 individual experiments instrumented with different sensor layouts,loading,and rock types in *** optimal model achieves over 86%F-score on unseen waveforms at both the lab-and *** model outperforms existing empirical methods in classification of rock fracture mechanisms monitored by a sparse microseismic *** facilitates rapid assessment of,and early warning against,various rock engineering hazard such as induced earthquakes and rock bursts.

关键词： Multi-scale Fracture processes Microseismic Acoustic emission Source mechanism Deep learning

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