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An efficient lossy link localization approach for wireless sensor networks

Frontiers of Information Technology & Electronic Engineering 2017年第5期18卷 689-707页

作者： Wen-yan CUI Xiang-ru MENG Bin-feng yanG huan-huan yanG Zhi-yuan ZHAO College of Information and Navigation Air Force Engineering UniversityXi'an 710077China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China PLA of 94543 lining 272000China

Network fault management is crucial for a wireless sensor network(WSN) to maintain a normal running state because faults(e.g., link failures) often occur. The existing lossy link localization(LLL) approach usually infers the most probable failed link set first, and then gives the fault hypothesis set. However, the inferred failed link set contains many possible failures that do not actually occur. That quantity of redundant information in the inferred set can pose a high computational burden on fault hypothesis inference, and consequently decreases the evaluation accuracy and increases the failure localization time. To address the issue, we propose the conditional information entropy based redundancy elimination(CIERE), a redundant lossy link elimination approach, which can eliminate most redundant information while reserving the important information. Specifically, we develop a probabilistically correlated failure model that can accurately reflect the correlation between link failures and model the nondeterministic fault propagation. Through several rounds of mathematical derivations, the LLL problem is transformed to a set-covering problem. A heuristic algorithm is proposed to deduce the failure hypothesis set. We compare the performance of the proposed approach with those of existing LLL methods in simulation and on a real WSN, and validate the efficiency and effectiveness of the proposed approach.

关键词： Lossy link localization Redundancy eliminating algorithm Set-covering Wireless sensor networks(WSNs) Network diagnosis

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Clinical outcomes of small incision lenticule extraction versus femtosecond laser-assisted LASIK for myopia: a Meta-analysis

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International Journal of Ophthalmology(English edition) 2017年第9期10卷 1436-1445页

作者： huan yan Li-yan Gong Wei huang yan-Li Peng Department of Ophthalmology the Second Affiliated Hospital of Chongqing Medical University Chongqing Medical University Department of Ophthalmology Chongqing Aier-Mega Eye Hospital Aier Eye Hospital Group Aier School of Ophthalmology Central South University

AIM：To evaluate the possible differences in visual quality between small incision lenticule extraction（SMILE）and femtosecond laser in situ keratomileusis（FS-LASIK）for ***：A Meta-analysis was *** were from previously reported comparative studies treated with SMILE versus *** Pub Med,EMBASE,Cochrane,Web of Science and Chinese databases（*** and CNKI）were searched in *** 2016 using Rev Man 5.1 version *** differences in visual acuity,aberration and biomechanical effects within six months postoperatively were ***-seven studies including 4223 eyes were ***：No significant differences were observed between SMILE and FS-LASIK in terms of the proportion of eyes that lost one or more lines of corrected distance visual acuity after surgery（P=0.14）,the proportion of eyes achieving an uncorrected distance visual acuity of 20/20or better（P=0.43）,the final refractive spherical equivalent（P=0.89）,the refractive spherical equivalent within±1.00diopter of the target values（P=0.80）,vertical coma（P=0.45）and horizontal coma（P=0.06）.Compared with the FSLASIK group,total higher-order aberration（P〈0.001）and spherical aberration（P〈0.001）were higher and the decrease in corneal hysteresis（P=0.0005）and corneal resistance factor（P=0.02）were lower in the SMILE ***：SMILE and FS-LASIK are comparable in efficacy,safety and predictability for correcting ***,the aberration in the SMILE group is superior to that in the FS-LASIK group,and the loss of biomechanical effects may occur less frequently after SMILE than after FS-LASIK.

关键词： Meta-analysis small incision lenticuleextraction femtosecond laser in situ keratomileusis myopia

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Runoff projections of the Qinling Mountains and their impact on water demand of Guanzhong region in Northwest China

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Journal of Mountain Science 2022年第8期19卷 2272-2285页

作者： ZHANG Zhao-peng DUAN Ke-qin LIU huan-cai MENG Ya-li CHEN Rong LI Da-wei LI shuang-shuang School of Geographical Sciences and Tourism Shaanxi Normal UniversityXi'an 710062China School of Geographical Sciences Shanxi Normal UniversityLinfen 041081China

The Qinling Mountains are the main source of water supply to the Weihe River and Hanjiang River,but systematic studies on runoff changes in this region are *** study simulated the annual runoff in the Qinling Mountains from 1970 to 2015 using the Variable Infiltration Capacity(VIC)hydrological model and projected runoff changes from 2015 to 2100 under different Shared Socio-economic Pathways(SSPs).Moreover,the water demand in the north and south of the Qinling Mountains from 2019 to 2100 was analyzed by constructing a system dynamic *** results show that the mean annual runoff in the southern and northern slopes of the Qinling Mountains from 1970 to 2015 were 21.5×10^(9) and 3.52×10^(9) m^(3),*** the SSP1-2.6,SSP2-4.5,SSP3-7.0,and SSP5-8.5 scenarios from 2015 to 2100,the mean annual runoff in the southern(northern)slope will increase by 2.9(1.5),2.0(1.4),2.7(1.6),and-2.1(0.4)×10^(9) m^(3),*** mean annual water consumption in the northern foothills of the Qinling Mountains for Baoji,Xi’an,and Weinan cities is projected to increase from 4.1×10^(9) m^(3) in 2015 to 7.6×10^(9) m^(3) in 2100,while that in the southern foothills for Hanzhong,Ankang,and Shangluo cites is projected to increase from 2.7×10^(9) m^(3) in 2015 to 4.8×10^(9) m^(3) in ***,runoff in the southern slope is much larger than the water demand in the southern *** increase of runoff in the northern slope cannot satisfy the water demand in the northern ***,the South-to-North Water Transfer project is proposed for meeting the water demand in the northern *** the premise of ensuring downstream water demand,approximately 10.5×10^(9) m^(3) of water resources can be transferred from the southern slope to the Weihe River and the Beijing-Tianjin-Hebei-Henan regions under SSP1-2.6,but only 3.9×10^(9) m^(3) can be transferred under SSP5-8.5.

关键词： Qinling Mountains Climate change Runoff Hydrological model CMIP6 System Dynamics

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Chemical characteristics of fine particulate matter emitted from commercial cooking

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Frontiers of Environmental Science & Engineering 2016年第3期10卷 559-568页

作者： Bing PEI Hongyang CUI huan LIU Naiqiang yan School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200040 China Shanghai Environmental Monitoring Center Shanghai 200030 China Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System Science Tsinghua University Beijing 100084 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) Tsinghua University Beijing 100084 China

The chemical characteristics of fine particulate matter （PM2.5） emitted from commercial cooking were explored in this study. Three typical commercial restau- rants in Shanghai, i.e., a Shanghai-style one （SHS）, a Sichuan-style one （SCS） and an Italian-style one （ITS）, were selected to conduct PM2.5 sampling. Particulate organic matter （POM） was found to be the predominant contributor to cooking-related PM2.5 mass in all the tested restaurants, with a proportion of 69.1% to 77.1%. Specifically, 80 trace organic compounds were identified and quantified by gas chromatography/mass spectrometry （GC/MS）, which accounted for 3.8%-6.5% of the total PM2.5 mass. Among the quantified organic compounds, unsaturated fatty acids had the highest concentration, followed by saturated fatty acids. Comparatively, the impacts of other kinds of organic compounds were much smaller. Oleic acid was the most abundant single species in both SCS and ITS. However, in the case of SHS, linoleic acid was the richest one. ITS produced a much larger mass fraction of most organic species in POM than the two Chinese cooking styles except for monosaccharide anhy-drides and sterols. The results of this study could be utilized to explore the contribution of cooking emissions to PM2.5 pollution and to develop the emission inventory of PM2.5 from cooking, which could then help the policymakers design efficient treatment measures and control strategies on cooking emissions in the future.

关键词： commercial cooking PM2.5 chemical char- acteristics organic matter

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Neuroimmune connections between corticotropinreleasing hormone and mast cells:novel strategies for the treatment of neurodegenerative diseases

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Neural Regeneration Research 2021年第11期16卷 2184-2197页

作者： Piplu Bhuiyan Yi-Wei Wang huan-huan Sha Hong-Quan Dong yan-Ning Qian Department of Anesthesiology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu ProvinceChina Department of Anesthesiology Wuxi People’s HospitalNanjing Medical UniversityWuxiJiangsu ProvinceChina

Corticotropin-releasing hormone is a critical component of the hypothalamic–pituitary–adrenal axis,which plays a major role in the body’s immune response to *** cells are both sensors and effectors in the interaction between the nervous and immune *** first responders to stress,mast cells can initiate,amplify and prolong neuroimmune responses upon ***-releasing hormone plays a pivotal role in triggering stress responses and related diseases by acting on its receptors in mast ***-releasing hormone can stimulate mast cell activation,influence the activation of immune cells by peripheral nerves and modulate neuroimmune *** latest evidence shows that the release of corticotropin-releasing hormone induces the degranulation of mast cells under stress conditions,leading to disruption of the bloodbrain barrier,which plays an important role in neurological diseases,such as Alzheimer’s disease,Parkinson’s disease,multiple sclerosis,autism spectrum disorder and amyotrophic lateral *** studies suggest that stress increases intestinal permeability and disrupts the blood-brain barrier through corticotropin-releasing hormone-mediated activation of mast cells,providing new insight into the complex interplay between the brain and gastrointestinal *** neuroimmune target of mast cells is the site at which the corticotropin-releasing hormone directly participates in the inflammatory responses of nerve *** this review,we focus on the neuroimmune connections between corticotropin-releasing hormone and mast cells,with the aim of providing novel potential therapeutic targets for inflammatory,autoimmune and nervous system diseases.

关键词： blood-brain barrier corticotropin-releasing hormone gastrointestinal tract inflammatory mast cells neuroimmune neurological disorders

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Preparation of Core-Shell Structured Cobalt Coated Tungsten Carbide Composite Powders by Intermittent Electrodeposition

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Journal of Materials Science & Technology 2016年第11期32卷 1171-1178页

作者： huan Zhong Yuejun Ouyang Gang Yu Bonian Hu Dalong yan State Key Laboratory of Chemo/Biosensing and Chemometrics. College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China Huaihua Key Laboratory of Functional Inorganic & Polymeric Materials Huaihua University Huaihua 418000 China Department of Materials and Chemical Engineering Hunan Institute of Technology Hengyang 421008 China

Core-shell structured cobalt coated tungsten carbide（WC/Co） composite powders were prepared by intermittent electrodeposition. The influence of process parameters such as current density, single deposition pulse, p H value and surfactants on the formation of WC/Co was investigated and characterized by scanning electron microscopy（SEM）, electrochemical station, acidometer and X-ray diffraction（XRD） *** composite powders with 54% cobalt content were fabricated at a current density of 16 A dm-2, with a load of 10 g dm-3WC powders and a stirring speed of 600 r min-1at an operation temperature of 40 ± 2 °C,and 90% current efficiency was obtained with a single deposition pulse of 1.5 min and single stirring pulse of 2 min during 12 min efficient electrodeposition time. The uniformly distributed WC/Co powders could be obtained in the cobalt electrolyte containing 300 mg dm-3PEG-2000. The spherical cobalt grains coated WC particles were prepared in the p H 4-5 electrolyte at the Co deposition rate of 0.58 g min-1. A practical process for high efficient production of WC/Co powders by electrodeposition was developed in the present work.

关键词： Composite powder Electrodeposition Dispersion Crystal structure

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Research on Wet Steam Spontaneous Condensing Flows Considering Phase Transition and Slip

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Journal of Thermal Science 2013年第4期22卷 320-326页

作者： Ke CUI huan-long CHEN yan-ping SONG Hiroharu OYAMA School of Energy Science and Engineering Harbin Institute of Technology Mitsubishi Heavy Industries LTD

A new dual-fluid model considering phase ansition and velocity slip was proposed in this paper and the Cunningham correction was used in the droplet resistance calculation. This dual-fluid model was applied to the numerical simulations of wet steam flow in a 2D LAVAL nozzle and in the White cascade respectively. The results of two simulations demonstrate that the model is reliable. Meanwhile, the spontaneous condensing flow in White cascade was analyzed and it infers that the irreversible loss caused by condensation accounts for the largest share （about 8.78% of inlet total pressure） in total pressure loss while the loss caused by velocity slip takes the smallest share （nearly 0.42%）, and another part of total pressure loss caused by pneumatic factors contributes a less share than condensation, i.e. almost 3.95% of inlet total pressure.

关键词： dual-fluid model wet steam spontaneous condensing flow LAVAL nozzle White cascade.

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Effect of Multi-Pass Equal Channel Angular Pressing on the Microstructure and Mechanical Properties of a Heterogeneous Mg_(88)Y_8Zn_4 Alloy

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Journal of Materials Science & Technology 2016年第12期32卷 1274-1281页

作者： huan Liu Zhaojun Cheng Kai yan Jingli yan Jing Bai Jinghua Jiang Aibin Ma College of Mechanics and Materials Hohai University Ocean and Coastal Engineering Research Institute Hohai University College of Mechanical Engineering Yangzhou University Jiangsu Key Lab of Advanced Metallic Materials College of Materials Science and EngineeringSoutheast University

The microstructure evolutions and mechanical properties of a heterogeneous Mg88Y8Zn4（in at.%） alloy during multi-pass equal channel angular pressing（ECAP） were systematically investigated in this *** results show that four phases,i.e.α-Mg,18 R long period stacking ordered（LPSO） phase,Mg24Y5 and Y-rich phase,are present in cast *** ECAP,dynamic recrystallization（DRX） occurs and the diameter of DRXedα-Mg grains decreases to 0.8 μ***,precipitation of lamellar 14 H LPSO structure is developed withinα-Mg *** the refinement of α-Mg grains and precipitation of 14 H LPSO contribute to the increase in micro-hardness from 98 HV to 135 HV for α-*** addition,a simplified model describing the evolution of 18 R LPSO phase is established,which illustrates that 18 R undergoes a four-step morphological evolution with increasing strains during ECAP,*** lath → bent lath → cracked lath → smaller *** test results indicate that the alloy has been markedly strengthened after multi-pass ECAP,and the main reason for the significantly enhanced mechanical properties could be ascribed to the DRXed α-Mg grains,newly precipitated 14 H lamellas,18 R kinking and refined 18 R particles.

关键词： Magnesium alloys Equal channel angular pressing (ECAP) Long period stacking ordered (LPSO) phase Microstructure Mechanical property

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Applications of M_xSe_y(M=Fe, Co, Ni) and Their Composites in Electrochemical Energy Storage and Conversion

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Nano-Micro Letters 2019年第3期11卷 46-78页

作者： Huijie Zhou Xiaxia Li yan Li Mingbo Zheng huan Pang School of Chemistry and Chemical Engineering Guangling College Yangzhou University

Transition-metal selenides(M_xSe_y,M = Fe,Co,Ni)and their composites exhibit good storage capacities for sodium and lithium ions and occupy a unique position in research on sodium-ion and lithium-ion *** and their composites are used as active materials to improve catalytic ***,low electrical conductivity,poor cycle stability,and low rate performance severely limit their *** review provides a comprehensive introduction to and understanding of the current research progress of M_xSe_y and their ***,this review proposes a broader research platform for these materials,including various bioelectrocatalytic performance tests,lithium-sulfur batteries,and fuel *** synthesis method and related mechanisms of M_xSe_y and their composites are reviewed,and the effects of material morphologies on their electrochemical performance are *** advantages and disadvantages of M_xSe_y and their composites as well as possible strategies for improving the storage and conversion of electrochemical energy are also summarized.

关键词： M_xSe_y Battery Supercapacitor Electrocatalysis

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Efficacy of comprehensive remote ischemic conditioning in elderly patients with acute ST-segment elevation myocardial infarction underwent primary percutaneous coronary intervention

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Journal of Geriatric Cardiology 2022年第6期19卷 435-444页

作者： yan-Ling WANG Qi yanG Cheng-yan HU yan-yan CHU Zheng SUN huan ZHAO Zhi LIU Department of Cardiology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Radiology Chaoyang HospitalCapital Medical UniversityBeijingChina Department of Radiology Xuanwu HospitalCapital Medical UniversityBeijingChina

BACKGROUND Remote ischemic conditioning(RIC)is used to protect against myocardial ***,there is no adequate evidence for comprehensive RIC in elderly patients with ST-segment elevation myocardial infarction(STEMI).This study aimed to test whether comprehensive RIC,started pre-primary percutaneous coronary intervention(PPCI)and repeated daily on 1-30 days post-PPCI,can improve myocardial salvage index(SI),left ventricular ejection fraction(LVEF),Kansas City Cardiomyopathy Questionnaire Clinical Summary Score(KCCQ-CSS)and 6-min walk test distance(6MWD)in elderly patients with acute STEMI during 12 months *** 328 consenting elderly patients were randomized to receive standard PPCI plus comprehensive RIC(the treatment group)or standard PPCI(the control group).SI at 5-7 days after PPCI,LVEF,left ventricular end-diastolic volume index(LVEDVI),left ventricular end-systolic volume index(LVESVI),KCCQ-CSS,6MWD and adverse events rates were measured and *** SI was significantly higher in the treatment group[interquartile range(IQR):0.38-0.66,P=0.037].There were no significant differences in major adverse events at 12 *** the differences of LVEDVI,LVESVI and LVEF between the treatment group and the control group did not reach statistical significance at 6 months and 12 months,LVEF tended to be higher,LVEDVI tended to be lower in the treatment *** KCCQ-CSS was significantly higher in the treatment group at 1 month(IQR:46.5-87,P=0.001)and 12 months(IQR:55-93,P=0.008).There was significant difference in 6MWD between the treatment group and the control group(IQR:258-360 ***:250-345,P=0.002)at 1 month and(IQR:360-445 ***:345-432,P=0.035)at 12 months.A modest correlation was found between SI and LVEF(r=0.452,P<0.01),KCCQ-CSS(r=0.440,P<0.01)and 6MWD(r=0.384,P<0.01)respectively at 12 *** The comprehensive RIC can improve SI,KCCQ-CSS and *** may be an adjunctive therapy to PPCI in elderly patients with STEMI

关键词： patients infarction coronary

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