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5th IEEE International Conference on Civil Aviation Safety and Information technology, ICCASIT 2023

作者： Tian, Xianhui Liu, Kun Wang, Xuhui Xu, Yubin China Academy of Civil Aviation Science and Technology Research and Development Center Beijing China

ISBN: (纸本)9798350310603

In the process of civil aviation, many safety management concepts and advanced technologies have been used to improve the safe operation level of *** records the huge amount of data of the flight process and is favored by everyone. However, accident analysis needs to be combined with other multi-dimensional flight operation data, and pilots are more inclined to focus on risk before flight rather than post-flight analysis. This article focuses on hard landing accidents, based on historical flight operation data, and uses Multiple Linear Regression and Ridge Regression analysis methods to study the functional relationship between landing load and other factors that cause hard landing, forming a hard landing prediction *** model can be used to guide the risk management of actual flight operation. Pilots could understand the risk points and controllable variables in the landing process of the flight before the flight, so as to formulate sufficient flight *** they take control measures during the landing process to reduce the possibility of hard landing. © 2023 IEEE.

关键词： Multiple linear regression

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Subsidence Monitoring of Beijing Capital International Airport with InSAR technology Using Sentinel-1 Images 5

Subsidence Monitoring of Beijing Capital International Airpo...

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5th IEEE International Conference on Civil Aviation Safety and Information technology, ICCASIT 2023

作者： Xu, Yubin Wang, Xuhui Dong, Zhe Zhang, Donglei Yao, Hongyu Jin, Qinfang China Academy of Civil Aviation Science and Technology Research and Development Center Beijing China

ISBN: (纸本)9798350310603

As the number of airports rises, the safety monitoring requirements for airport structures and surrounding supporting facilities during the operational phase are becoming increasingly urgent. SAR as an active ground observation technology, can support ground subsidence monitoring for critical facilities. It can be conducted without interrupting operations at civil aviation transport airports with advantages such as low cost, high point density, non-contact, and elevated capture positions (typically at an altitude of 600 km), leaving no impact on airport operations. With long-term, multi-period captures of the airport and its surrounding environment using SAR technology, we can effectively monitor the vertical subsidence of airport runways, aprons, and terminals. The obtained results will be presented with millimeter-level accuracy through the processing of the acquired multi-temporal data. In this paper, we analyzed the subsidence of facilities at BCIA from 2017 to 2019 using Sentinel-1 images, and the obtained results demonstrate its effectiveness in the application of airport risk prevention. © 2023 IEEE.

关键词： Synthetic aperture radar

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Modeling and Control of an Aerial Flight Platform Using for Fixed-Wing UAV Landing 9

Modeling and Control of an Aerial Flight Platform Using for ...

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9th International Conference on Control, Decision and Information Technologies, CoDIT 2023

作者： Wang, Liming Di, Jian Zhang, Zhenlong Liao, Fei Ji, Haibo University of Science and Technology of China China China Aerodynamics Research and Development Center China

ISBN: (纸本)9798350311402

This paper investigates the modeling and control of an aerial flight platform built with a quadrotor for assisting in the landing of fixed-wing UAVs. During the process of landing on the aerial flight platform, the lift force of the fixed-wing UAV decreases with the decrease in airspeed. Therefore, the aerial platform will bear additional force and torque disturbance, which seriously affects the attitude stability of the aerial flight platform. The existing methods are difficult to maintain the stability of the aerial flight platform under such strong disturbances. To solve this problem, we propose a novel modeling and control method for the aerial flight platform. First, we consider the aerial flight platform and the fixed-wing © 2023 IEEE.

关键词： Antennas

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Multimorbidity and mortality among older patients with coronary heart disease in Shenzhen,China

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Journal of Geriatric Cardiology 2024年第1期21卷 81-89页

作者： Fu-Rong LI Shuang WANG Xia LI Zhi-Yuan CHENG Cheng JIN Chun-Bao MO Jing ZHENG Feng-Chao LIANG Dong-Feng GU Shenzhen Key Laboratory of Cardiovascular Health and Precision Medicine Southern University of Science and TechnologyShenzhenGuangdongChina School of Public Health and Emergency Management Southern University of Science and TechnologyShenzhenGuangdongChina Shenzhen Health Development Research and Data Management Center ShenzhenChina School of Medicine Southern University of Science and TechnologyShenzhenGuangdongChina

BACKGROUND The current understanding of the magnitude and consequences of multimorbidity in Chinese older adults with coronary heart disease(CHD)is *** aimed to assess the association and population-attributable fractions(PAFs)between multimorbidity and mortality among hospitalized older patients who were diagnosed with CHD in Shenzhen,*** We conducted a retrospective cohort study of older Chinese patients(aged≥65 years)who were diagnosed with *** proportional hazards models were used to estimate the associations between multimorbidity and all-cause and cardiovascular disease(CVD)*** also calculated the *** The study comprised 76,455 older hospitalized patients who were diagnosed with CHD between January 1,2016,and August 31,*** them,70,217(91.9%)had multimorbidity,defined as the presence of at least one of the predefined 14 chronic *** with cancer,hemorrhagic stroke and chronic liver disease had the worst overall death risk,with adjusted HRs(95%CIs)of 4.05(3.77,4.38),2.22(1.94,2.53),and 1.85(1.63,2.11),*** CVD mortality,the highest risk was observed for hemorrhagic stroke,ischemic stroke,and chronic kidney disease;the corresponding adjusted HRs(95%CIs)were 3.24(2.77,3.79),1.91(1.79,2.04),and 1.81(1.64,1.99),***-cause mortality was mostly attributable to cancer,heart failure and ischemic stroke,with PAFs of 11.8,10.2,and 9.1,*** for CVD mortality,the leading PAFs were heart failure,ischemic stroke and diabetes;the corresponding PAFs were 18.0,15.7,and 6.1,*** Multimorbidity was common and had a significant impact on mortality among older patients with CHD in Shenzhen,***,heart failure,ischemic stroke and diabetes are the primary contributors to ***,prioritizing improved treatment and management of these comorbidities is essential for the survival prognosis of CHD patients from a holistic public health perspective.

关键词： patients morbidity mortality

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Friction reactions induced by selective hydrogenation of textured surface under lubricant conditions

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Friction 2024年第1期12卷 174-184页

作者： Naizhou DU Xubing WEI Xiaowei LI Zan CHEN Shiqi LU Jiaqing DING Cunao FENG Kai CHEN Jianghao QIAO Dekun ZHANG Kwang-Ryeol LEE Tiancai ZHANG School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Computational Science Center Korea Institute of Science and TechnologySeoul 136-791Republic of Korea Technology Development Department Shipbuilding Technology Research InstituteShanghai 200032China

The passivation of hydrogen atoms and the conformation of textured surfaces under oil-lubricated conditions are effective strategies to obtain amorphous carbon(a-C)films with extremely low *** is critical to understanding the influence mechanism of selective surface hydrogenation on the tribological behaviors of textured a-C film under oil-lubricated *** particular,the interactions of hydrogen atoms and lubricants are confusing,which is enslaved to the in situ characterization *** reactive molecular dynamics(RMD)simulations were conducted to analyze the friction response of textured a-C films with selective hydrogenation surfaces under oil-lubricated *** results indicate that the existence of hydrogen atoms on specific bump sites significantly decreases the friction coefficient(μ)of textured a-C film,which is highly dependent on the surface hydrogen *** repulsion between hydrogen atoms and lubricant molecules prompts the formation of a dense lubricant film on the surface of the mating ***,with the enhancement of the surface hydrogen content,the passivation of the friction interface and the repulsion between hydrogen atoms and lubricants play dominant roles in reducing the friction coefficient instead of hydrodynamic lubrication.

关键词： textured amorphous carbon(a-C) selective hydrogenation oil lubrication friction mechanism reactive molecular dynamics(RMD)

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Clustering Optimization of Intelligent Algorithms in Financial Management Software (FMS)

Clustering Optimization of Intelligent Algorithms in Financi...

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2025 International Conference on Multi-Agent Systems for Collaborative Intelligence, ICMSCI 2025

作者： Chen, Wenjun Western Guangdong Digital Intelligent Accounting Development Research Center Zhanjiang University of Science and Technology Guangdong Zhanjiang524088 China

ISBN: (数字)9798331509828

ISBN: (纸本)9798331509828

Intelligent algorithms, especially clustering algorithms, have been widely used in the field of software analysis. Therefore, this study proposes the new financial management software (FMS) analysis model. First, this study reviews existing clustering algorithms and analyzes limitations of basic algorithms when processing large-scale financial data. The challenges of noise analysis are also reviewed. To this end, this study proposes a new clustering algorithm based on Gaussian mixture model. The core of this algorithm is to optimize parameter estimation by combining expectation maximization algorithm. At the same time, in order to improve clustering stability, a multi-feature model is introduced. This model can optimize the data selection and distance calculation paradigm in the clustering process. As for the usage of the clustering analysis, the main scenario is the software security. Focusing on the security, the enhanced model is proposed. This study also designs a security algorithm based on data stream analysis, which aims to ensure the privacy protection of the financial data during the clustering process. The experimental results show that the proposed model can effectively improve the data processing efficiency and security in financial management software. At the same time, the clustering test shows that the proposed model can stably analyze the software. © 2025 IEEE.

关键词： Expectation maximization algorithm

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Application of fractal model in the Jurassic tight sandstone reservoirs of central Junggar Basin as constrained by mercury ejection curves

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Energy Geoscience 2025年第1期6卷 149-166页

作者： Hongkang Zhao Xiangchun Chang Tianchen Ge Zhiping Zeng Junjian Zhang Daiqi Ming Runye Han College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong266590China Laboratory for Marine Mineral Resources Qingdao Marine Science and Technology CenterQingdaoShandong266237China Research Institute of Petroleum Exploration and Development Shengli Oilfield CompanySinopecDongyingShandong257001China

The high-pressure mercury intrusion (HPMI) experiment is widely used to assess the pore architecture oftight sandstone reservoirs. However, the conventional analysis of the high- pressure mercury intrusionhas always focused on the mercury injection curves themselves, neglecting the important geologicalinformation conveyed by the mercury ejection curves. This paper quantitatively describes the fractalcharacteristics of ejection curves by using four fractal models, i.e.,. Menger model, Thermodynamicmodel, Sierpinski model, and multi- fractal model. In comparison with mercury injection curves, weexplore the fractal significance of mercury ejection curves and define the applicability of different fractalmodels in characterizing pore architectures. Investigated tight sandstone samples can be divided intofour types (Types A, B, C and D) based on porosity, permeability, and mercury removal efficiency. Type Dsamples are unique in that they have higher permeability (>0.6 mD) but lower mercury removal effi-ciency (<35%). Fractal studies of the mercury injection curve show that it mainly reflects the pore throatcharacteristics, while the mercury ejection curve serves to reveal the pore features, and porosity andpermeability correlate well with the fractal dimension of the injection curve, while mercury removalefficiency correlates only with the Ds' value of the ejection curve. The studies on the mercury ejectioncurves also reveal that the small pores and micropores of the Type C and Type D samples are moredeveloped, with varying pore architecture. The fractal dimension Ds' value of Type D samples is greaterthan that of Type C samples, and the dissolution of Type D samples is more intense than that of Type Csamples, which further indicates that the Type D samples are smaller in pore size, rougher in surface, andwith greater difficulty for the hydrocarbon to enter, resulting in their reservoir capacity probably lessthan that of Type C samples. In this regard, the important infor

关键词： Fractal theory Mercury ejection curve Mercuryremoval efficiency Inhomogeneity Pore architecture

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KSKV:Key-Strategy for Key-Value Data Collection with Local Differential Privacy

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Computer Modeling in Engineering & sciences 2024年第6期139卷 3063-3083页

作者： Dan Zhao Yang You Chuanwen Luo Ting Chen Yang Liu Artificial Intelligence Development Research Center Institute of Scientific and Technical Information of ChinaBeijing100038China Industry Development Department NSFOCUS Inc.BeijingChina School of Information Science and Technology Beijing Forestry UniversityBeijing100083China School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China Institute of Computing Technology China Academy of Railway Sciences Corporation LimitedBeijing10081China

In recent years,the research field of data collection under local differential privacy(LDP)has expanded its focus fromelementary data types to includemore complex structural data,such as set-value and graph ***,our comprehensive review of existing literature reveals that there needs to be more studies that engage with key-value data *** studies would simultaneously collect the frequencies of keys and the mean of values associated with each ***,the allocation of the privacy budget between the frequencies of keys and the means of values for each key does not yield an optimal utility *** the importance of obtaining accurate key frequencies and mean estimations for key-value data collection,this paper presents a novel framework:the Key-Strategy Framework forKey-ValueDataCollection under ***,theKey-StrategyUnary Encoding(KS-UE)strategy is proposed within non-interactive frameworks for the purpose of privacy budget allocation to achieve precise key frequencies;subsequently,the Key-Strategy Generalized Randomized Response(KS-GRR)strategy is introduced for interactive frameworks to enhance the efficiency of collecting frequent keys through group-anditeration *** strategies are adapted for scenarios in which users possess either a single or multiple key-value ***,we demonstrate that the variance of KS-UE is lower than that of existing *** claims are substantiated through extensive experimental evaluation on real-world datasets,confirming the effectiveness and efficiency of the KS-UE and KS-GRR strategies.

关键词： Key-value local differential privacy frequency estimation mean estimation data perturbation

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A covalently integrated ZIF-8/polyamide acid mixed matrix membrane with superior gas separation performance

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Chinese Journal of Chemical Engineering 2024年第12期76卷 30-41页

作者： Guozhen Li Shiqi Ling Yuhui Cui Shilong Dong Tianyin Liu Ting Li Siyu Pang Peiyong Qin National Energy Research and Development Center for Biorefinery College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Bio-Based Fiber Manufacturing Technology China Textile AcademyBeijing 100025China Paris Curie Engineer School Beijing University of Chemical TechnologyBeijing 100029China

Zeolitic imidazolate framework-8(ZIF-8)is a typical filler used to fabricate mixed matrix membranes(MMMs)on account of its attractive advantage of high selective permeability for gas ***,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,However,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,which will lead to a decrease of selectivity and the performance of gas separation will be strongly ***,we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH_(2),Kapton polyamide acid was selected as the polymer *** showed that the ZIF-8-NH_(2)/Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging,even the filler loading up to 45%(mass).The 45%(mass)of ZIF-8-NH_(2)/Kapton membrane showed 297 barrer(1 barrer=10^(-10)10 cm^(3)·cm·cm^(-2)·s^(-1)·cmHg^(-1),1 cmHg=1333.22 Pa,standard temperature and pressure)of the permeability of H_(2)and 43.9 and 62.2 of selectivities for H_(2)/N_(2)and for H_(2)/CH_(4),respectively,which are beyond the upper limit of Robeson 2008.

关键词： Polyamide acid ZIF-8 Mixed matrix membrane Gas separation

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Entity generation algorithm based on reference expansion

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Journal of Electronic science and technology 2023年第3期21卷 63-72页

作者： Jia-Jia Ruan Xi-Xu He Min Zhang Yuan Gao Office of Scientific Research&Development University of Electronic Science and Technology of ChinaChengdu611731China School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu611731China Information Center University of Electronic Science and Technology of ChinaChengdu611731China Archives University of Electronic Science and Technology of ChinaChengdu611731China

The extraction and understanding of text knowledge become increasingly crucial in the age of big *** of the current research areas in the field of natural language processing(NLP)is how to accurately understand the text and collect accurate linguistic information because Chinese vocabulary is diverse and *** paper mainly studies the candidate entity generation module of the entity link *** candidate entity generation module constructs an entity reference expansion algorithm to improve the recall rate of candidate *** order to improve the efficiency of the connection algorithm of the entire system while ensuring the recall rate of candidate entities,we design a graph model filtering algorithm that fuses shallow semantic information to filter the list of candidate entities,and verify and analyze the efficiency of the algorithm through *** analyzing the related technology of the entity linking algorithm,we study the related technology of candidate entity generation and entity disambiguation,improve the traditional entity linking algorithm,and give an innovative and practical entity linking *** recall rate exceeds 82%,and the link accuracy rate exceeds 73%.Efficient and accurate entity linking can help machines to better understand text semantics,further promoting the development of NLP and improving the users’knowledge acquisition experience on the text.

关键词： Chinese Wikipedia Entity reference expansion Graph model

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