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Identification of aircraft longitudinal aerodynamic parameters using an online corrective test for wind tunnel virtual flight

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Chinese Journal of Aeronautics 2024年第9期37卷 261-275页

作者： Shang tai Chen BU Yanling WANG ting YUE Hailiang LIU Lixin WANG School of Aeronautical Science and Engineering Beihang UniversityBeijing 100191China AVIC Aerodynamics Research Institute Harbin 150001China

The identification of aerodynamic parameters is accomplished through the test data of the dynamic movement of scaled aircraft models flying dynamically in wind tunnel,which can real-ize the accurate acquisition of the aerodynamic model of the aircraft in the preliminary stage for aircraft design,and it is of great significance for improving the efficiency of aircraft ***-ever,the translational motion of the test model in the wind tunnel virtual flight is subject to con-straints that result in distinct flight dynamics compared to free *** constraints have implications for the accuracy of aerodynamic derivatives obtained through the identification of wind tunnel test *** this issue in mind,the research studies the differences in longitudinal dynamic characteristics between unconstrained free flight and wind tunnel virtual flight,and inno-vatively proposes an online correction test based wind tunnel virtual flight test *** lon-gitudinal trajectory and velocity changes of the model are solved online by the aerodynamic forces measured during the test,and then the coupled relationship between aircraft translation and rota-tion is used to correct the model's pitch attitude motion *** the first time,the problem of solving the data approximation for free flight has been solved,eliminating the difference between the dynamics of wind tunnel virtual flight and free flight,and improving the accuracy of the aero-dynamic derivative identification *** experiment's findings show that accurate aerodynamic derivatives can be identified based on the online correction test data,and the observed behaviour of the identified motion model has similarities to that of the free flight motion model.

关键词： Wind tunnels Displacement constraints Online solution Flightcontrol law Aerodynamic parameter identification

De-biased knowledge distillation framework based on knowledge infusion and label de-biasing techniques

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Journal of Electronic Science and Technology 2024年第3期22卷 57-68页

作者： Yan Li tai-Kang Tian Meng-Yu Zhuang Yu-ting Sun School of Economics and Management University of Electronic Science and Technology of ChinaChengdu611731China School of Economics and Management Beijing University of Posts and TelecommunicationBeijing100876China School of Electrical Engineering and Computer Science The University of QueenslandBrisbane4072Australia

Knowledge distillation,as a pivotal technique in the field of model compression,has been widely applied across various ***,the problem of student model performance being limited due to inherent biases in the teacher model during the distillation process still *** address the inherent biases in knowledge distillation,we propose a de-biased knowledge distillation framework tailored for binary classification *** the pre-trained teacher model,biases in the soft labels are mitigated through knowledge infusion and label de-biasing *** on this,a de-biased distillation loss is introduced,allowing the de-biased labels to replace the soft labels as the fitting target for the student *** approach enables the student model to learn from the corrected model information,achieving high-performance deployment on lightweight student *** conducted on multiple real-world datasets demonstrate that deep learning models compressed under the de-biased knowledge distillation framework significantly outperform traditional response-based and feature-based knowledge distillation models across various evaluation metrics,highlighting the effectiveness and superiority of the de-biased knowledge distillation framework in model compression.

关键词： De-biasing Deep learning Knowledge distillation Model compression

A novel fused bi-macrocyclic host for sensitive detection of Cr_(2)O_(7)^(2-)based on enrichment effect

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Chinese Chemical Letters 2024年第7期35卷 291-295页

作者： ting-ting Huang Jin-Fa Chen Juan Liu tai-Bao Wei Hong Yao Bingbing Shi Qi Lin Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education Key Laboratory of Eco-environmental Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission Gansu Provincial Biomass Function Composites Engineering Research CenterCollege of Chemical EngineeringNorthwest Minzu University(Northwest University for Nationalities)Lanzhou 730000China

Improving the highly selective and sensitive binding of chemosensor to target guest is always very *** order to solve this issue,herein,the enrichment effect was introduced into the design of chemosensor molecule.A novel bi-fused-macrocyclic host molecule BPN1 was synthesized by bridging a pillar[5]arene and a naphthalene diimide(NDI)group through hydrogen-bond-rich *** the BPN1,the naphthalimide side ring is outside the cavity of the pillar[5]*** addition,Cr(VI)greatly threat human health and the environment due to its severe toxicity,and it is very important to develop effective chemosensor for sensitive and selective detection of Cr_(2)O_(7)^(2-)or its ion *** this paper,the novel bi-fused-macrocyclic host molecule BPN1 can recognize Cr_(2)O_(7)^(2-)with high selectivity and *** mechanism of BPN1 recognition of Cr_(2)O_(7)^(2-)was studied through experiments and density functional theory(DFT),the results show that BPN1 could supply enrichment effect to bind Cr_(2)O_(7)^(2-)through multiple weak interactions such as hydrogen bonds and anion-π,and achieve highly sensitive and selective detection of Cr_(2)O_(7)^(2-).It is a significant and feasible strategy for improve high selectivity and sensitivity of host to specific objects by using the enrichment effect of fused bi-macrocyclic.

关键词： Pillararene Bi-macrocyclic Detection of Cr_(2)O_(7)^(2−) DFT The enrichment effect

Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation

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Chinese Journal of Polymer Science 2024年第6期42卷 838-850页

作者： Yu-Liang Yang tai-Ran Zhang Yan-ting Han Shao-Yun Guo Qin-Gong Rong Jia-Bin Shen State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyChengdu610065China West China Hospital/West China School of Nursing Sichuan UniversityChengdu610041China Shandong Senrong New Materials Co. Ltd.Zibo256401China

In order to achieve efficient and durable oil-water emulsion separation,the membranes possessing high separation efficiency and mechanical strength attract extensive attention and are in great *** present study,a kind of polytetrafluoroethylene(PTFE)-based bilayer membrane was fabricated by electrospinning fibrous PTFE(fPTFE)on an expanded PTFE(ePTFE)*** morphological observation revealed that the fibrous structure of the fPTFE layer could be tailored by controlling the formulation of spinning *** addition of appropriate polyoxyethylene(PEO)would make the fibers in the fPTFE layer finer and more *** a result,the compounded membrane exhibited a small pore size of approximately 1.25µm and a substantial porosity nearing 80%.This led to super-hydrophobicity,characterized by a high water contact angle(WCA)of 149.8°,and facilitated rapid oil *** water-in-oil emulsion separation experiment further confirmed that the compounded membrane not only had a high separation efficiency closing 100%,but such an outstanding separation capacity could be largely retained,either through multiple cycles of use or through strong acid(pH=1),strong alkali(pH=12),or high-temperature(100°C)***,the mechanical behavior of the bilayer membrane was basically contributed by that of each layer in terms of their volume *** significantly,the poor creep resistance of fPTFE layer was suppressed by compounding with ePTFE ***,this study has laid the groundwork for a novel approach to create PTFE-based compounded membranes with exceptional overall characteristics,showing promise for applications in the realm of emulsion separation.

关键词： ePTFE Electrospinning membrane Bilayer compounding Emulsion separation

Influencer Identification of Threshold Models in Hypergraphs

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Journal of Mathematical Research with Applications 2024年第5期 569-582页

作者： Xiaojuan SONG Xilong QU ting WEI Jilei tai Renquan ZHANG School of Mathematical Sciences Dalian University of Technology

This paper mainly studies the influence maximization problem of threshold models in hypergraphs, which aims to identify the most influential nodes in hypergraphs. Firstly, we introduce a novel information diffusion rule in hypergraphs based on Threshold Models and conduct the stability analysis. Then we extend the CI-TM algorithm, originally designed for complex networks, to hypergraphs, denoted as the H-CI-TM algorithm. Secondly, we use an iterative approach to get the globally optimal solutions. The analysis reveals that our algorithm ultimately identifies the most influential set of nodes. Based on the numerical simulations, HCI-TM algorithm outperforms several competing algorithms in both synthetic and real-world hypergraphs. Essentially, when provided with the same number of initial seeds, our algorithm can achieve a larger activation size. Our method not only accurately assesses the influence of individual nodes but also identifies a set of nodes with greater impact. Furthermore, our results demonstrate good scalability when handling intricate relationships and large-scale *** outcomes of our research provide substantial support for the applications of the threshold models across diverse fields, including social network analysis and marketing strategies.

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Regioselective cation exchange reaction for photoelectrochemical water splitting

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Rare Metals 2024年第7期43卷 3400-3407页

作者： Mo-Yan Chen tai-Song Zhang Zhi Yan Jiang-Nan Lv Xiao-ting Sun Rui-Xia Yang Mark TSwihart Xiao-Hong Xu Yang Liu Research Institute of Materials Science of Shanxi Normal University&Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education Taiyuan 030031China Department of Chemical and Biological Engineering University at Buffalo(SUNY)NY 14260USA Department of Materials Science Fudan UniversityShanghai 200433China

Engineering copper sulfide-based heterostructures via cation exchange(CE)is an appealing approach,as it allows selective combination of distinct compositions and functions of metal *** heterostructures can play a significant role in photoelectrochemical applications,but the effect of the ratio between two or more domains in such heterostructures on the photoresponse has not been well explored.

关键词： exchange sulfide splitting

Prediction of hepatic artery occlusion after liver transplantation by ultrasound characteristics and clinical risk factors

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World Journal of Radiology 2024年第6期16卷 196-202页

作者： Yu-ting Lai Yi Chen tai-Shi Fang Zhi-Yan Li Ning-Bo Zhao Department of Ultrasound National Clinical Research Centre for Infectious DiseasesThe Third People’s Hospital of ShenzhenThe Second Hospital Affiliated with the Southern University of Science and TechnologyShenzhen 518112Guangdong ProvinceChina Department of Liver Surgery National Clinical Research Centre for Infectious DiseasesThe Third People’s Hospital of ShenzhenThe Second Hospital Affiliated with the Southern University of Science and TechnologyShenzhen 518112Guangdong ProvinceChina

BACKGROUND Hepatic artery occlusion(HAO)after liver transplantation(LT)is a devastating complication,resulting in early graft loss and reduced overall ***-sound is an established assessment method for HAO in patients following LT,especially those with complex hepatic artery *** We retrospectively analyzed the ultrasound characteristics and the clinic risk factors associated with HAO in 400 adult LT patients who were enrolled and treated at the Third People's Hospital of Shenzhen between November 2016 and July *** patients diagnosed with acute HAO(A-HAO)by surgery and fifteen diagnosed with chronic HAO(C-HAO)were included.A control group of 33 patients without HAO complications during the same period were randomly selected using a random number *** patients underwent an ultrasono-graphy *** including resistance index(RI),peak systolic velocity(PSV),and portal vein velocity(PVV)were compared across the ***,basic clinical data were collected for all patients,including gender,age,primary diagnosis,D-dimer concentration,total operation time,cold ischemia time,hot ischemia time,intraoperative blood loss and transfusion,intraoperative urine volume,infusion,model for end-stage liver disease(MELD)score,and whether complex hepatic artery reconstructions were ***,risk factors influencing HAO formation after LT were *** Compared to the non-HAO group,PVV and RI were higher in the A-HAO group,while PSV was ***,both PSV and RI were lower in the C-HAO group compared to the non-HAO *** proportion of patients undergoing complex hepatic artery reconstructions and the gamma-glutamyltransferase(GGT)level before occlusion were significantly higher in the A-HAO group compared to the non-HAO ***,there were no distinct differences between the two groups in D-dimer,MELD score,pre-occlusion alanine transaminase and aspartate transaminase levels,or intrao

关键词： Hepatic artery occlusion Ultrasonography Diagnostic performance Risk factors Liver transplantation

Longitudinal associations of cardiovascular health and vascular events with incident dementia

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Stroke & Vascular Neurology 2024年第4期9卷 418-428,I0066-I0130页

作者： Ya-Nan Ou Kevin Kuo Liu Yang Ya-Ru Zhang Shu-Yi Huang Shi-Dong Chen Yue-ting Deng Yu Guo Rui-Qi Zhang Bang-Sheng Wu Lan Tan Qiang Dong Jian-Feng Feng Wei Cheng Jin-tai Yu Department of Neurology Qingdao Municipal HospitalQingdao UniversityQingdaoShandongPeople's Republic of China Department of Neurology and National Center for Neurological Disorders Huashan HospitalState Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain ScienceShanghai Medical CollegeFudan UniversityShanghaiPeople's Republic of China Institute of Science and Technology for Brain-inspired Intelligence Fudan UniversityShanghaiPeople's Republic of China Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence Fudan UniversityMinistry of EducationShanghaiPeople's Republic of China

Introduction Evidence supporting cardiovascular diseases could increase the risk of dementia remains fragmented.A comprehensive study to illuminate the distinctive associations across different dementia types is still *** study is sought to:(1)determine the clinical validity of Framingham General Cardiovascular Risk Score(FGCRS)for dementia assessment and(2)examine the associations between cardiovascular diseases and the risk of *** A total of 432079 dementia-free individuals at baseline from UK Biobank were *** Cox proportional hazard models were used to investigate the prospective associations for FGCRS and a series of cardiovascular diseases with all-cause dementia(ACD)and its major components,Alzheimer’s disease(AD)and vascular dementia(VaD).Results During a median follow-up of 110.1 months,4711 individuals were diagnosed with *** was associated with increased risks across the dementia *** stratification analysis,high-risk groups have demonstrated the greatest dementia burdens,particularly to *** 74 traits,9 adverse associations,such as chronic ischaemic heart disease(ACD:HR=1.354;AD:HR=1.269;VaD:HR=1.768),atrioventricular block(ACD:HR=1.562;AD:HR=1.556;VaD:HR=2.069),heart failure(ACD:HR=1.639;AD:HR=1.543;VaD:HR=2.141)and hypotension(ACD:HR=2.912;AD:HR=2.361;VaD:HR=3.315)were *** distinctions were also found,with atrial fibrillation,cerebral infarction,and haemorrhage only associated with greater risks of ACD and *** By identifying distinctive associations between cardiovascular diseases and dementia,this study has established a comprehensive‘mapping’that may untangle the long-standing *** has demonstrated its predictivity beyond cardiovascular diseases burdens,suggesting potential opportunities for implantation.

关键词： cardiovascular diseases supporting

Mendelian randomization analysis:the causal relationship between statins and eye diseases

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Medical Data Mining 2024年第4期7卷 34-40页

作者： Lian-tai Song Jia-Meng Wei Hao-ting Jia Feng-Yi Zhang Qing-Fang Deng Yi-Xiao Wang Huai-Zhi Qin Qian Xu Basic Medical College Chengde Medical UniversityChengde 067000China Department of Biochemistry Chengde Medical UniversityChengde 067000China

Background:The specific role of statins in the field of ophthalmology is not *** have the advantages of pleiotropic,relatively safety and low cost,and are a promising choice for the prevention and management of eye ***,there is a divergence of findings regarding the correlation between statin treatment and ocular ***,our intention is to investigate the impact of statins on eye conditions through the utilization of Mendelian randomization(MR).Methods:The UK Biobank provided data on five statins,while the FinnGen database provided data on six eye diseases,including age-related macular degeneration,glaucoma,diabetic retinopathy,senile cataract,drug-induced cataract,and other *** exploration involved the utilization of various methods including inverse variance weighted(IVW),weighted median,weighted multivariate(weighted mode),and MR-Egger *** assess the reliability of the findings,funnel analysis,MR-Egger regression,leave-one-out method,and Cochran’s Q test were ***,reverse MR analysis was performed to evaluate the potential for reverse causality between statin use and eye ***:Based on IVW analysis,there were three pairs of positive results with significant(P<0.05)causal relationship,including atorvastatin and drug-induced cataract(odds ratio(OR)=1.65E-05,95%confidence interval(CI):2.24E-09–0.12;P_(IVW)=0.02),rosuvastatin and drug-induced cataract(OR=2.77E-18,95%CI:7.53E-35–0.1;P_(IVW)=0.04)and fluvastatin with senile cataract(OR=0.5,95%CI:0.25–0.99;P_(IVW)=0.05).No significant causal relationship was observed between other types of statins and eye *** analysis found that the results were *** MR analysis indicated no evidence of reverse causality between statin use and the examined eye ***:Our study finally verified the strong causal relationship between three drugs and two diseases(atorvastatin and rosuvastatin and drug cataract

关键词： Mendel randomization statins eye diseases