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CsEE journal of Power and Energy systems 2024年第3期10卷 1307-1319页

作者： Yi wang Yanxin liu Mingdong wang Venkata Dinavahi jun liang Yonghui sun school of Electrical and Information engineering Zhengzhou UniversityZhengzhou 450001China Henan engineering Research Center of Power Electronics and Energy systems Zhengzhou 450001China Department of Electrical and Computer engineering University of AlbertaEdmontonAB T6G 2V4Canada school of engineering Cardiff UniversityCardiff CF243AAUK College of Energy and Electrical engineering Hohai UniversityNanjing 210098China IEEE

With the increasing demand for power system stability and resilience,effective real-time tracking plays a crucial role in smart grid ***,most studies have focused on measurement noise,while they seldom think about the problem of measurement data loss in smart power grid *** solve this problem,a resilient fault-tolerant extended Kalman filter(RftEKf)is proposed to track voltage amplitude,voltage phase angle and frequency ***,a threephase unbalanced network’s positive sequence fast estimation model is ***,the loss phenomenon of measurements occurs randomly,and the randomness of data loss’s randomness is defined by discrete interval distribution[0,1].subsequently,a resilient fault-tolerant extended Kalman filter based on the real-time estimation framework is designed using the timestamp technique to acquire partial data loss ***,extensive simulation results manifest the proposed RftEKf can synchronize the smart grid more effectively than the traditional extended Kalman filter(EKf).

关键词： Dynamic state estimation Kalman filter partial missing measurements power systems smart grid synchronized measurements

slag Corrosion Resistance of MgO-ZrO_2 Refractories

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China's Refractories 2012年第1期21卷 17-21页

作者： YUAN lin1,CHEN songlin1,2,ZENG Luju1,liU Xijun1,WU Xingsheng1,sUN jialin2 1 Ruitai Materials technology Co. Ltd. ,China Building Materials Academy,Beijing 100024,China 2 school of Materials science and engineering,University of science and technology Beijing, Beijing 100083,China Ruitai Materials technology Co. Ltd. China Building Materials Academy Beijing 100024 China school of Materials science and engineering University of Science and Technology Beijing Beijing 100083 China

slag corrosion resistance of MgO -ZrO2 refractories was inrestigated ill this work. the resuhs indicate that in a non-oriented electric steel slag systenl with a high ratio of ealci^t to silica, the slag resistance of MgO - ZrO, refractories can be described as flllows ： ZrO2 reacts with GtO .forming calcium zireonate compound which strengthens the material and blocks the channel of the slag infihration ; however, in an oriented electric steel slag system with a high concentration of silica and the low ratio of calcia to silica, the slag corrosion resistance ofM gO-ZrO： refractories is different ; ZrO2 reaets with CaO forming the ealcium zirconate and simultaneously one more product C2s as well; C2s cam improve corro- sion resistance by blinding pore and enhancing slag viscosity; therefore, it is expected to be the major reason for the enham＇ed corrosion resistance observed for MgO-ZrO2 refractories.

关键词： corrosion resistatlce mechanism magne-sia-zirconia brick : RH degasser

Polyoxometalates coupled covalent organic frameworks as highly active photothermal nanoreactor for CO_(2)cycloaddition

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Nano Research 2024年第7期17卷 5975-5984页

作者： tian wang Yunqing Zhu Wei wang junfeng Niu Zhiyi Lu Peilei He school of Environmental science and engineering Shaanxi University of Science and TechnologyXi’an 710021China Key Laboratory of Advanced fuel Cells and Electrolyzers technology of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China College of Environmental science and engineering North China Electric Power UniversityBeijing 102206China University of Chinese Academy of sciences Beijing 100049China

Covalent organic frameworks(COfs)-based nanoreactors have attracted broad interest in many fields due to their voidconfinement ***,the inherent drawback of conventional nanoreactors is the lack of internal active sites,which limits their widespread ***,we report the construction of hierarchical COf(EB-tfP)nanoreactor with pre-synthesized polyoxometalates(POM,[PV_(2)W_(10)O_(40)]^(5–)(PV_(2)W_(10)))clusters encapsulated inside of COf(POM@COf).PV_(2)W_(10)@EB-tfP anchors nucleophilic-group(Br–ions)and PV_(2)W_(10)anion cluster within the COf framework via electrostatic interactions,which not only simplifies the reaction system but also enhances catalytic *** reaction performance of the PV_(2)W_(10)@EB-tfP nanoreactor can be tuned to achieve excellent catalytic activity in CO_(2)cycloaddition reaction(CCR)for~97.63%conversion and~100%selectivity under visible light irradiation.A mechanistic study based on density functional theory(Dft)calculations and insitu characterization was also carried *** summary,we have reported a method for achieving the uniform dispersion of POM single clusters into COf nanoreactor,demonstrating the potential of POM@COf nanoreactor for synergistic photothermal catalytic CO_(2)cycloaddition.

关键词： photothermal nanoreactor CO_(2)cycloaddition polyoxometalate photothermal-synergistic catalysis covalent organic frameworks

New development thoughts on the bio-inspired intelligence based control for unmanned combat aerial vehicle

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science China(technological sciences) 2010年第8期53卷 2025-2031页

作者： DUAN HaiBin 1 ,sHAO shan 2 ,sU BingWei 3 &ZHANG Lei 41 state Key Laboratory of science and technology on Holistic flight Control,school of Automation science and Electrical engineering, Beijing University of aeronautics and Astronautics,Beijing 100191,China 2 flight Control Department,shenyang Aircraft Design and Research Institute,shenyang 110035,China 3 Beijing Institute of Near space Vehicle’s system engineering,Beijing 100076,China 4Integration and Project section,Air force Equipment Academy,Beijing 100085,China state Key Laboratory of science and technology on Holistic flight Control School of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics flight Control Department Shenyang Aircraft Design and Research Instit

Bio-inspired intelligence is in the spotlight in the field of international artificial intelligence,and unmanned combat aerial vehicle(UCAV),owing to its potential to perform dangerous,repetitive tasks in remote and hazardous,is very promising for the technological leadership of the nation and essential for improving the security of *** the basis of introduction of bioinspired intelligence and UCAV,a series of new development thoughts on UCAV control are proposed,including artificial brain based high-level autonomous control for UCAV,swarm intelligence based cooperative control for multiple UCAVs,hy-brid swarm intelligence and Bayesian network based situation assessment under complicated combating environments, bio-inspired hardware based high-level autonomous control for UCAV,and meta-heuristic intelligence based heterogeneous cooperative control for multiple UCAVs and unmanned combat ground vehicles(UCGVs).the exact realization of the proposed new development thoughts can enhance the effectiveness of combat,while provide a series of novel breakthroughs for the intelligence,integration and advancement of future UCAV systems.

关键词： bio-inspired intelligence unmanned combat aerial vehicle(UCAV) artificial brain autonomous control bayesian network bio-inspired hardware heterogeneous cooperative control

Altered spontaneous brain activity patterns in hypertensive retinopathy using fractional amplitude of low-frequency fluctuations:a functional magnetic resonance imaging study

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International journal of Ophthalmology(English edition) 2024年第9期17卷 1665-1674页

作者： Xue-lin wang Xu-jun Zheng li-juan Zhang jin-Yu Hu Hong Wei Qian ling liang-Qi He Cheng Chen Yi-Xin wang Xu Chen Yi shao Department of Ophthalmology the First Affiliated Hospital of Jiangxi Medical CollegeEye Hospital of Shangrao CityShangrao 334000Jiangxi ProvinceChina jiangxi Medical College Shangrao 334000Jiangxi ProvinceChina Department of Ophthalmology Shanghai General HospitalShanghai Jiao Tong University School of MedicineNational Clinical Research Center for Eye DiseasesShanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesShanghai 200080China Department of Ophthalmology The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina school of Optometry and Vision science Cardiff UniversityCardiff CF244HQWalesUK Ophthalmology Centre of Maastricht University Maastricht 6200MSLimburg ProvincieNetherlands

AIM:to study functional brain abnormalities in patients with hypertensive retinopathy(HR)and to discuss the pathophysiological mechanisms of HR by fractional amplitude of low-frequency fluctuations(fALffs)***:twenty HR patients and 20 healthy controls(HCs)were respectively *** age,gender,and educational background characteristics of the two groups were *** functional magnetic resonance imaging(fMRI)scanning,the subjects’spontaneous brain activity was evaluated with the fALff *** operating characteristic(ROC)curve analysis was used to classify the ***,we used Pearson’s correlation analysis to explore the relationship between fALff values in specific brain regions and clinical behaviors in patients with ***:the brain areas of the HR group with lower fALff values than HCs were the right orbital part of the middle frontal gyrus(RO-MfG)and right lingual *** contrast,the values of fALffs in the left middle temporal gyrus(MtG),left superior temporal pole(stP),left middle frontal gyrus(MfG),left superior marginal gyrus(sMG),left superior parietal lobule(sPL),and right supplementary motor area(sMA)were higher in the HR *** results of a t-test showed that the average values of fALffs were statistically significantly different in the HR group and HC group(Pthe fALff values of the left middle frontal gyrus in HR patients were positively correlated with anxiety scores(r=0.9232;Pssion scores(r=0.9682;PsION:fALff values in multiple brain regions of HR patients are abnormal,suggesting that these brain regions in HR patients may be dysfunctional,which may help to reveal the pathophysiological mechanisms of HR.

关键词： hypertensive retinopathy fractional amplitude of low-frequency fluctuation brain region magnetic resonance imaging

Research on Reliability test of Blade server

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Research on Reliability Test of Blade Server

the proximity between hydroxyl and single atom determines the catalytic reactivity of Rh1/CeO_(2) single-atom catalysts

第三届国际自动化测试与仪器仪表学术会议

作者： Zhang Xiaojie~1 jiang tongmin~1 wang Dong~2 (1.Department of system engineering of engineering technology Beijing University of aeronautics and Astronautics Beijing 100191 China) (2.school of Automation science and Electrical engineering Beijing University of aeronautics and Astronautics Beijing 100191 China)

＜正＞Blade server represents the direction of high performance computing in the *** is very important for the development of super computer in our *** need to improve it based on reliability test for it stably *** paper introduces the necessary of reliability test research for blade server and some correlation test technology,for the characteristic of Dawning tC2600 blade server,this paper discusses the test principle and the function which selects in the actual use, explained reliability and environmental test technology for this server,the method of reliability test are giving *** Dawning tC2600 blade server that passed reliability test will play an important role in the field of high performance *** the end,pointed that the proper and effective environmental test can improve the reliability of blade *** this conclusion can be applied to other type’s server.

关键词： blade server high performance computing reliability test environmental test

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Nano Research 2024年第1期17卷 397-406页

作者： Danfeng Wu shuyun Zhou Congcong Du juan li jianyu Huang Hong-xia shen Abhaya K.Datye shan jiang jeffrey t.Miller sen lin Haifeng Xiong state Key Laboratory of Physical Chemistry of solid surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China state Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China College of Biology and Chemical engineering Jiaxing UniversityJiaxing 314000China Department of Chemical&Biological engineering University of New MexicoAlbuquerqueNM 8731-0001USA Davidson school of Chemical engineering Purdue UniversityWest LafayetteIN 47907-2100USA Innovation Laboratory for sciences and technologies of Energy Materials of fujian Province(IKKEM) Xiamen 361102China fujian Key Laboratory of Rare-earth functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyan 366300China

the local structure of the metal single-atom site is closely related to the catalytic activity of metal single-atom catalysts(sACs).However,constructing sACs with homogeneous metal active sites is a challenge due to the surface heterogeneity of the conventional ***,we prepared two Rh1/CeO_(2)sACs(0.5Rh1/r-CeO_(2)and 0.5Rh1/c-CeO_(2),respectively)using two shaped CeO_(2)(rod and cube)exposing different facets,i.e.,CeO_(2)(111)and CeO_(2)(100).In CO oxidation reaction,the t100 of 0.5Rh1/r-CeO_(2)sACs is 120°C,while the t100 of 0.5Rh1/c-CeO_(2)sACs is as high as 200°*** in-situ CO diffuse reflectance infrared fourier transform spectroscopy(CO-DRIfts),we found that the proximity between OH group and Rh single atom on the plane surface plays an important role in the catalytic activity of Rh1/CeO_(2)sAC system in CO *** Rh single atom trapped at the CeO_(2)(111)crystal surface forms the Rh1(OH)adjacent species,which is not found on the CeO_(2)(100)crystal surface at room ***,during CO oxidation,the OH group far from Rh single atom on the 0.5Rh1/c-CeO_(2)disappears and forms Rh1(OH)adjacent species when the temperature is above 150°*** formation of Rh1(OH)adjacentCO intermediate in the reaction is pivotal for the excellent catalytic activity,which explains the difference in the catalytic activity of Rh single atoms on two different CeO_(2)*** formed Rh1(OH)adjacent-O-Ce structure exhibits good stability in the reducing atmosphere,maintaining the Rh atomic dispersion after CO oxidation even when pre-reduced at high temperature of 500°*** functional theory(Dft)calculations validate the unique activity and reaction path of the intermediate Rh1(OH)adjacentCO species *** work demonstrates that the proximity between metal single atom and hydroxyl can determine the formation of active intermediates to affect the catalytic performances in catalysis.

关键词： crystal plane Rh1/CeO_(2)single-atom catalyst proximity of Rh and hydroxyl coordination structure CO oxidation

Enhancing electromagnetic wave absorption with core‐shell structured siO_(2)@MXene@Mos_(2)nanospheres

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Carbon Energy 2024年第8期6卷 90-104页

作者： Xuewen jiang Qian wang limeng song Hongxia Lu Hongliang Xu Gang shao Hailong wang Rui Zhang Changan wang Bingbing fan school of Material science and engineering Zhengzhou UniversityZhengzhouHenanChina Henan Key Laboratory of Aeronautical Materials and Application technology School of Material Science and EngineeringZhengzhou University of AeronauticsZhengzhouHenanChina school of Materials science and engineering Tsinghua UniversityBeijingChina

Material composition and structural design are important factors influencing the electromagnetic wave(EMW)absorption performance of *** alleviate the impedance mismatch attributed to the high dielectric constant of ti_(3)C_(2)t_(x)MXene,we have successfully synthesized core‐shell structured siO_(2)@MXene@Mos_(2)*** architecture,comprising siO_(2)as the core,MXene as the intermediate layer,and Mos_(2)as the outer shell,is achieved through an electrostatic self‐assembly method combined with a hydrothermal *** complex core‐shell structure not only provides a variety of loss mechanisms that effectively dissipate electromagnetic energy but also prevents self‐aggregation of MXene and Mos_(2)***,the synergistic combination of siO_(2)and Mos_(2)with highly conductive MXene enables the suitable dielectric constant of the composites,ensuring optimal impedance ***,the core‐shell structured siO_(2)@MXene@Mos_(2)nanospheres exhibit excellent EMW absorption performance,featuring a remarkable minimum reflection loss(RL_(min))of−52.11 dB(2.4 mm).It is noteworthy that these nanospheres achieve an ultra‐wide effective absorption bandwidth(EAB)of 6.72 *** work provides a novel approach for designing and synthesizing high‐performance EMW absorbers characterized by“wide bandwidth and strong reflection loss.”

关键词： core‐shell structure electromagnetic wave absorption multiloss mechanism siO_(2)@MXene@Mos_(2)

GMAt:A Graph Modeling Method for Group Preference Prediction

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journal of systems science and systems engineering 2024年第4期33卷 475-493页

作者： Xiangyu li Xunhua Guo Guoqing Chen International Business school Jinan UniversityZhuhai519070China school of Economics and Management Tsinghua UniversityBeijing100084China

Preference prediction is the building block of personalized services,and its implementation at the group level helps enterprises identify their target customers *** methods for preference prediction mainly focus on behavioral interactions to extract the associations between groups and products,ignoring the importance of other auxiliary records(e.g.,online reviews and social tags)in association *** paper proposes a novel method named GMAt for group preference prediction,aiming to collectively detect the sophisticated association patterns from user generated content(UGC)and behavioral *** doing so,we construct a tripartite graph to collaborate these two types of data,and design a deep-learning algorithm with mutual attention module for generating the contextualized representations of groups and *** experiments on two real-world datasets show that GMAt is superior to other baselines in terms of group preference ***,GMAt is able to improve prediction accuracy compared with its different variants,further verifying the proposed method’s effectiveness on association pattern detection.

关键词： Group preference UGC tripartite graph deep learning

A numerical simulation strategy for a compressor’s underlying axisymmetric characteristic and its application in body force model

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Chinese journal of aeronautics 2024年第8期37卷 79-90页

作者： shijie liU tianyu PAN Qiushi li ` school of Energy and Power engineering Beihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 100191China Key Laboratory of fluid and Power Machinery Ministry of EducationXihua UniversityChengdu 610039China

Accurate prediction of the aerodynamic response of a compressor under inlet distortion is crucial for next-generation civil aircraft,such as Boundary Layer Ingestion(Bli)silent ***,research on the Body force(Bf)model plays a significant role in achieving this ***,distorted inlet airflow can lead to varying operating conditions across different spatial locations of the compressor,which may cause some regions to operate outside the stability ***,the accuracy of Bf model simulations might be *** address this issue,this paper proposes a numerical simulation strategy for acquiring the steady axisymmetric three-dimensional flow field of a compressor operating at low mass flow rates,which is known as the Underlying Axisymmetric Pressure Rise Characteristic(UAPRC).the proposed simulation accounts for two different rotor speeds of a transonic compressor and identifies initial positions in the flow field where deterioration occurs based on prior experimental ***,simulation results are incorporated into the Bf model to replicate hub instability observed in *** results demonstrate that this strategy provides valid predictions of the UAPRC of the compressor,thereby addressing the limitations associated with the Bf model.

关键词： Compressor partial instability Performance at low mass flow rates Underlying axisymmetric pressure rise characteristic Novel simulation strategy Body force model