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Numerical investigation on thermomechanical behavior of alumina–calcium hexaluminate refractories for purging plug

Journal of Iron and Steel Research International 2024年第2期31卷 389-400页

作者： Li-ping Pan Ya-wei Li fang-guan tan Yi-chen Chen Yang-fan Xu Zhu He Bao-kuan Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and TechnologyWuhan430081HubeiChina

Alumina–spinel refractories used in slit-type purging plugs are susceptible to cross-sectional damage,resulting in a serious mismatch between their service life and that of ***–calcium hexaluminate refractories have gradually become the new trend in purging plug materials with the development of refining *** thermomechanical damage of slit-type purging plugs with alumina–calcium hexaluminate refractory was investigated by the thermo-solid coupling *** with the polynomial fitting and design of experiments methods,the influence of thermophysical parameters on temperature and thermal stress of alumina–calcium hexaluminate refractories for purging plugs was systematically *** results show that the maximum thermal stress of the purging plugs appears during the stages of steel transporting and stirring,and the vulnerable parts are located above Y=0.323 *** thermal conductivity and the coefficient of thermal expansion of the material are the most sensitive parameters to the temperature and thermal stress inside the structure,*** addition of more calcium hexaluminate can relieve the stress concentration and large deformation around the ***,when the content of calcium hexaluminate is 47 wt.%and in the form of aggregate-binder,the temperature and thermal stress distribution inside the refractory are optimal,which can effectively improve the service life of the slit-type purging plug.

关键词： Purging plug Thermomechanical damage Refractory Design of experiments method Stress

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Structural optimization and design of purging plug for improving its service performance

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Journal of Iron and Steel Research International 2022年第4期29卷 628-635页

作者： fang-guan tan Sheng-li Jin Zhu He Ya-wei Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Chair of Ceramics Montanuniversitaet LeobenLeoben 8700Austria

Purging plug with slits is widely used in the secondary refining process,and its service life determines the downtime and production *** achieve a good performance in service life,optimizing the geometric structure of the slit,which can alleviate the stress concentration around the slit,was employed using the finite plate ***,the performance of the purging plugs with different shapes of slits in the refining effect was investigated by conducting the water model *** numerical simulation results showed that the appropriate shapes of slits could alleviate the stress concentration *** the water model experiment,the mixing time of the purging plug with circular slits is lesser than that of the purging plug with rectangular slits when the gas flow is less than 6.02 L/*** with the rectangular slits,the circular slits are detrimental to smaller and well-distributed ***,the inclusion removal rate of the purging plug with circular slits is approximately 10%larger than that of the purging plug with the rectangular slits.

关键词： Purging plug Stress concentration Water model experiment Mixing time Inclusion removal Ladle metallurgy

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Numerical study of creep effect on purging plug performance under cyclic service

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Journal of Iron and Steel Research International 2022年第7期29卷 1119-1128页

作者： fang-guan tan Sheng-li Jin Zhu He Xiong Liang Ya-wei Li Jing Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Chair of Ceramics Montanuniversitaet Leoben8700 LeobenAustria The Key Laboratory of Chemical Metallurgy Engineering of Liaoning Province and School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina

The service life of the purging plug is one of the fundamental factors that determine the downtime and usage efficiency of the whole *** creep behaviour of the purging plug was thus investigated to identify the possible failure *** first,the creep parameters of the Norton–Bailey strain hardening rule were inversely identified via the results of the creep ***,the thermal-solid coupling model approach was employed to predict the creep behaviour of the purging plug,in which the Norton–Bailey strain hardening rule was *** numerical results show that the temperature of the purging plug presents a cyclic trend after the first service period since the preheating temperature is lower than the temperature of molten ***,the distribution of the creep strain intensity in a layered form could also contribute to a gradual spalling of the purging plug end in ***,the creep strain concentration around the slit can be responsible for the clogging of the purging plug.

关键词： Strain hardening Creep test Creep deformation Purging plug Castable corundum

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A low-frequency and broadband wave-insulating vibration isolator based on plate-shaped metastructures

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1171-1188页

作者： Wei WEI Feng guan Xin fang College of Intelligent Science National University of Defense TechnologyChangsha410073China Naval Research Academy Beijing100161China

A metamaterial vibration isolator,termed as wave-insulating isolator,is proposed,which preserves enough load-bearing capability and offers ultra-low and broad bandgaps for greatly enhanced wave *** consists of plate-shaped metacells,whose symmetric and antisymmetric local resonant modes offer several low and broad mode bandgaps although the complete bandgap remains high and *** bandgap mechanisms,vibration isolation properties,effects of key parameters,and robustness to complex conditions are *** experimentally demonstrated,the wave-insulating isolator can improve the vibration insulation in the ranges of[50 Hz,180 Hz]and[260 Hz,400 Hz]by 15 dB and 25 dB,respectively,in contrast to the conventional isolator with the same first resonant frequency.

关键词： metamaterial and metastructure vibration isolation bandgap wave insulation plate

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Design of Protograph LDPC-Coded MIMO-VLC Systems with Generalized Spatial Modulation

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China Communications 2024年第3期21卷 118-136页

作者： Dai Lin fang Yi guan Yongliang Mohsen Guizani School of Information Engineering Guangdong University of TechnologyGuangzhou 51006China The State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an 710126China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore Department of Machine Learning Mohamed Bin Zayed University of Artificial Intelligence(MBZUAI)Abu DhabiUnited Arab Emirates

This paper investigates the bit-interleaved coded generalized spatial modulation(BICGSM) with iterative decoding(BICGSM-ID) for multiple-input multiple-output(MIMO) visible light communications(VLC). In the BICGSM-ID scheme, the information bits conveyed by the signal-domain(SiD) symbols and the spatial-domain(SpD) light emitting diode(LED)-index patterns are coded by a protograph low-density parity-check(P-LDPC) code. Specifically, we propose a signal-domain symbol expanding and re-allocating(SSER) method for constructing a type of novel generalized spatial modulation(GSM) constellations, referred to as SSERGSM constellations, so as to boost the performance of the BICGSM-ID MIMO-VLC ***, by applying a modified PEXIT(MPEXIT) algorithm, we further design a family of rate-compatible P-LDPC codes, referred to as enhanced accumulate-repeat-accumulate(EARA) codes,which possess both excellent decoding thresholds and linear-minimum-distance-growth property. Both analysis and simulation results illustrate that the proposed SSERGSM constellations and P-LDPC codes can remarkably improve the convergence and decoding performance of MIMO-VLC systems. Therefore, the proposed P-LDPC-coded SSERGSM-mapped BICGSMID configuration is envisioned as a promising transmission solution to satisfy the high-throughput requirement of MIMO-VLC applications.

关键词： bit-interleaved coded modulation generalized spatial modulation multiple-input multipleoutput protograph LDPC codes visible light communication

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Rehabilitation care for pain in elderly knee replacement patients

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World Journal of Clinical Cases 2024年第4期12卷 721-728页

作者： Li Liu Qiao-Zhen guan Li-fang Wang Wuhan Fourth Hospital Wuhan 430033Hubei ProvinceChina Department of Orthopaedics Wuhan Third HospitalWuhan 430074Hubei ProvinceChina

BACKGROUND Total knee arthroplasty(TKA)is recognized as the most effective surgical intervention for relieving pain and improving joint mobility and deformity in patients with knee osteoarthritis and other synovial *** application of accelerated postoperative rehabilitation(enhanced recovery after surgery)has demonstrated its efficacy in improving patient outcomes,and early postoperative joint function exercise has become a key prognostic factor in knee *** unexpected appearance of limb pain and swelling hindered the patient’s tendency for early mobilization,leading in prolonged hospitalization,delayed functional recovery and negative psychological responses.A retrospective analysis was conducted on a cohort of 116 patients who under-went TKA at our hospital between July 2019 and July *** patients were divided into two groups:A control group(n=58)receiving programmatic nur-sing,and an observed group(n=58)receiving programmed nursing combined with a collaborative nursing model.A pain management team consisting of attending physicians,head nurses,and responsible nurses was *** measures included visual analogue scale(VAS)scores,activities of daily living(ADL)scale scores,and functional *** ADL scores of patients in both groups exhibited a continuous ***,there was no statistically significant difference in the ADL scores between the two groups at 48 h and the 7th d post-surgery(P>0.05).Upon reexamination at the 3rd mo,the observation group demonstrated higher ADL scores compared to the control group(67.48±14.69 vs 59.40±16.06,P0.05).The functional status of patients in both groups exhibited a gradual increase prior to intervention and at the 1st,2nd,and 3rd month following discharge(P<0.05).There was no statistically significant difference in knee joint function scores b

关键词： Programmed pain nursing Collaborative nursing Total knee arthroplasty

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The reservoir characteristics and their controlling factors of the sublacustrine fan in the Paleogene Dongying Formation, Bohai Sea,China

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Journal of Palaeogeography 2024年第1期13卷 127-148页

作者： Xiao-Jun Pang guan-Min Wang Meng Zhao Qing-Bin Wang Xue-fang Zhang School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Tianjin Branch of China National Offshore Oil Corporation Limited Tianjin 300459China

Sublacustrine fan is an important element in continental lacustrine basins and is significant for reservoir exploration. Oil and gas resources have been found in the sublacustrine fan sandstone reservoirs of the Paleogene Dongying Formation in the Bohai Sea. In this study, the characteristics of the sublacustrine fan reservoirs and the controlling factors are studied using information from logging, cores, physical properties,casting thin sections, X-ray diffraction of clay minerals, vitrinite reflectance, rock pyrolysis, manometry data,and 3D seismic data. The sublacustrine fans of the Dongying Formation in the LD10, QHD34, and BZ21 structures show high-quality reservoirs with porosity >15 % and permeability >5 m D. The main controlling factors of the high-quality reservoirs are attributed to the favorable sedimentary facies type and negligible compaction,and cementation, substantial dissolution of K-feldspar, overpressure, and the development of faults and fractures. A high-quality sublacustrine fan reservoir model has been established to explain how these factors affected the physical properties. The favorable targets for oil and gas exploration in the Dongying Formation of Bohai Sea include undercompacted sandy debris flow reservoirs showing the dissolution of K-feldspar, and the reservoirs which are connected to the source rocks by faults. This study provides insights to establish the relationship between sedimentology, diagenesis and reservoir quality. The results of this study are significant for the exploration and development of the sublacustrine fan sandstone reservoirs in the Bohai Sea and analogous sandstone reservoirs elsewhere.

关键词： Sublacustrine fan High-quality reservoir Dissolution Overpressure Fault Bohai Sea

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AdaPIP: Adaptive picture-in-picture guidance for 360° film watching

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Computational Visual Media 2024年第3期10卷 487-503页

作者： Yi-Xiao Li guan Luo Yi-Ke Xu Yu He fang-Lue Zhang Song-Hai Zhang Department of Computer Science and Technology Tsinghua UniversityBeijingChinaand Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijingChina Key Laboratory of Space Utilization Technology and Engineering Center for Space UtilizationChinese Academy of SciencesBeijingChina Victoria University of Wellington WellingtonNew Zealand

360°videos enable viewers to watch freely from different directions but inevitably prevent them from perceiving all the helpful *** mitigate this problem,picture-in-picture(PIP)guidance was proposed using preview windows to show regions of interest(ROIs)outside the current view *** identify several drawbacks of this representation and propose a new method for 360° film watching called *** enhances traditional PIP by adaptively arranging preview windows with changeable view ranges and *** addition,AdaPIP incorporates the advantage of arrow-based guidance by presenting circular windows with arrows attached to them to help users locate the corresponding ROIs more *** also adapted AdaPIP and Outside-In to HMD-based immersive virtual reality environments to demonstrate the usability of PIP-guided approaches beyond 2D *** user experiments on 2D screens,as well as in VR environments,indicate that AdaPIP is superior to alternative methods in terms of visual experiences while maintaining a comparable degree of immersion.

关键词： 360°videos picture-in-picture(PIP) virtual reality(VR) visual guidance

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Babao Dan Inhibits Gastric Cancer Progression in vivo Through Multiple Signaling Pathways

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World Journal of Traditional Chinese Medicine 2024年第1期10卷 14-21页

作者： Hai-Xia Shang Yi fang Bin guan Jian-Hua guan Jun Peng Jin-Yan Zhao Jiu-Mao Lin Institute of Oncology of Academy of Integrative Medicine Fujian University of Traditional Chinese MedicineFuzhouFujianChina Key Laboratory of Integrative Medicine of Fujian Province University Fujian University of Traditional Chinese MedicineFuzhouFujianChina Fujian Key Laboratory of Integrative Medicine on Geriatric Fujian University of Traditional Chinese MedicineFuzhouFujianChina Innovation and Transformation Center Fujian University of Traditional Chinese MedicineFuzhouFujianChina Xiamen Traditional Chinese Medicine Co. Ltd.XiamenFujianChina

Objective:The aim of this study was to explore the effects of Babao dan(BBD),a traditional Chinese medicine,on gastric cancer(GC)progression in *** and Methods:A subcutaneous xenograft mouse model of GC was established using MGC80-3 *** terminal deoxynucleotidyl transferase-mediated dUTP:2'-deoxyuridine 5'-triphosphate-biotin nick-end labeling method was adopted to detect cell apoptosis in *** expression levels of proteins associated with proliferation,apoptosis,and angiogenesis were measured by immunohistochemical staining or western blotting(WB).The activation and protein levels of p-c-Jun N-terminal kinase(JNK),p-p38,p-extracellular-regulated kinase 1/2,p-nuclear factor-κB(NF-κB),and p-STAT3 were examined by Bio-plex and ***:BBD significantly inhibited tumor growth in GC mouse models with no adverse effect on body weight or organ *** was also found that BBD significantly suppressed the proliferation of GC tumor cells,induced the apoptosis of tumor cells,and inhibited angiogenesis through inactivating with mitogen-activated protein kinase,NF-κB,and STAT3 ***:BBD exerts suppressive effects on GC tumor growth by regulating multiple pathways in vivo,which may provide a novel treatment option for GC therapy.

关键词： Babao dan gastric cancer multiple signaling pathways proliferation traditional Chinese medicine

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The burden of depression,anxiety and schizophrenia among the older population in ageing and aged countries:an analysis of the Global Burden of Disease Study 2019

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General Psychiatry 2024年第1期37卷 83-93页

作者： Ying Cheng Yu fang Jinxin Zheng shiyang guan Meiti Wang Wu Hong Shanghai Mental Health Center Shanghai Jiao Tong University School of MedicineShanghaiChina Department of Nephrology Rujin HospitalInstitute of NephrologyInstitute of NephrologyShanghai Jiao Tong University School of MedicineShanghaiChina School of Global Health Chinese Center for Tropical Diseases ResearchShanghai Jiao Tong University School of MedicineShanghaiChina Department of Epidemiology and Biostatistics School of Public HealthAnhui Medical UniversityHefeiAnhuiChina

Background Depression,anxiety and schizophrenia among older persons have become global public health ***,the burden of these disorders in ageing and aged countries has not been *** To investigate the burden of depression,anxiety and schizophrenia among older adults in ageing and aged *** Using data from the Global Burden of Disease Study 2019,we calculated the estimated annual percentage change(EAPC)in the age-standardised incidence rates(ASiR)and age-standardised disability-adjusted life years(DALYs)rates(ASDR)for depression,anxiety and schizophrenia of older people in ageing countries(China,India,Indonesia)and aged countries(Japan,Italy,Portugal)between 1990 and *** in incidence and DALYs were analysed by gender and *** In 2019,the highest incidence of depression,anxiety and schizophrenia in the older population in aged countries was in Japan(927271.3(752552.3-1125796.5),51498.2(37625.7-70487.3)and 126.0(61.0-223.2),respectively),while the highest incidence in ageing countries was in China(5797556.9(4599403.4-7133006.5),330256.1(246448.9-445987.4)and 1067.7(556.2-1775.9),respectively).DALYs for these disorders were similar,with the highest in Japan and *** 1990 to 2019,the ASIR for depressive disorders decreased in aged countries but increased in ageing countries;the ASIR for anxiety disorders and schizophrenia declined in both ageing and aged *** ASDR for depressive disorders was consistent with the ASIR but not for anxiety disorders and *** ASIR for depressive disorders was higher in older women,while the opposite was observed in anxiety disorders and ***,the conditions of burden of depressive disorders,anxiety disorders and schizophrenia in the 65-70-year-old age group were the most *** The incidence and DALYs of these three mental disorders increased while exhibiting differences between ageing and aged *** awareness about for

关键词： schizophrenia burden ageing

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