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化学反应工程与工艺 1992年第3期8卷 297-301页

作者：蔡平金涌俞芷青 L.-s.fan 清华大学化工系 100084 美国Ohio state University

以机理实验为依据,提出了一个描述气-固流化床中从鼓泡流态化向湍动流态化流型转变的物理模型。导出了当单位床层体积中气泡数目对气速的二阶导数为零时发生流型转变,该模型的计算机结果与实验数据吻合良好。

关键词：流型流化床反应器

Metric and Upper Dimension of Extended Annihilating-Ideal Graphs

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Algebra Colloquium 2024年第2期31卷 221-238页

作者： s.Nithya G.Elavarasi Genghua fan Department of Mathematics St.Xavier's College(Autonomous)Palayamkottai 627002Tamil NaduIndia Afiliated to Manonmaniam sundaranar University Abishekapatti Tirunelveli 627012Tamil NaduIndia PG and Research Department of Mathematics St.Xavier's College(Autonomous)Palayamkottai 627002Tamil NaduIndia Affiliated to Manonmaniam sundaranar University Abishekapatti Tirunelveli 627012Tamil NaduIndia 不详

The metric dimension problem is called navigation problem due to its application to robot navigation in *** this concept has wide applications in motion planning,sonar and loran station,and so *** this paper,we study certain results on the metric dimension,upper dimension and resolving number of extended annihilating-ideal graph EAG(R)associated to a commutative ring R,denoted by dim M(EAG(R)),dim+(EAG(R))and res(EAG(R)),*** we prove the finiteness conditions of dim M(EAG(R))and dim+(EAG(R)).In addition,we characterize dim M(EAG(R)),dim+(EAG(R))and res(EAG(R))for artinian rings and the direct product of rings.

关键词： extended annihilating-ideal graph metric dimension upper dimension resolving number

Analysis of Maternal Mortality in Obstetrics and Anesthesia Resuscitation in 15 Years at Chu Point“G”about 389 Cases Bamako/Mali

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Open Journal of Obstetrics and Gynecology 2020年第2期10卷 243-253页

作者： I.Kanté M.sima A.Coulibaly M.Traoré T.Théra A.Bocoum s.Z.Daou A.Kouma s.fané A.Traoré O.Traore Y.Traoré I.Teguété B.Maiga Obstetric Gynecology service of C.H.U Point“G” BamakoMali Obstetric Gynecology service of C.H.U Gabriel TOURE” BamakoMali Common Reference Health Center Commune II BamakoMali Obstetric Gynecology service of C.H.U KATI BamakoMali Obstetrics Gynecology service of CHU Hospital DU Mali BamakoMali Common Reference Health Center Commune V BamakoMali

Objective: Analyze the maternal mortality in the two departments of CHU Point “G” in Bamako, because of high maternal mortality rate in our country. Material and Methods: This was an analytical cross-sectional study on maternal deaths from February 19, 2005 to November 19, 2019 for patients admitted in both departments and who died during the pregnancy-puerperal period at CHU Point “G”. All the patients who died outside this pregnancy-puerperal period were not retained. The data were entered and analyzed using sPss 12.0 software. The statistical test used was that of Chi2, the statistical significance threshold was fixed at 5%. Results: During our study, we recorded 389 maternal deaths out of 16,033 admissions in 15 years and 18,060 live births during the same period making a maternal mortality ratio of 2153.931 and a frequency of 2.426. At the end of our study, we noted that the frequency of maternal deaths was higher in 2014: 12.9% (50/389). The maternal death predominantly affected women aged of 20 - 24 with a frequency of 22.4% (87/389). The multiparity (166/389 making 42.7%), illiteracy (341/389 making 87.7%), the poor evacuation conditions (non-medicalized transport): 263/389 making 67.6%;the evacuation without any evacuation sheet: 259/389 making 66.6%), poor CPN (Prenatal consultation) quality (undone CPN: 191/389 making 49.1%) and the poor monitoring of delivery works (no use of partograph in 343/389 making 88.2%) were the factors favoring maternal deaths. The main causes of maternal deaths were direct in 231/389 making 59.4% with hemorrhage in first line: 21.1% (82/389), infection (61/389 cases making 15.68%), dystocia: 50 cases making 12.85% and high blood pressure and complications (38/389 making 9.76%);indirect in 158/389 cases making 40.6% (Figures 1-3). The majority of women 65.8% (256/389) of our patients died in the gynecology and obstetrics department;in the Resuscitation department 73/389 making 18.8%;in the operating room 43/389 making 11.1% and

关键词： Hemorrhage High Blood Pressure Maternal Death Partographe Prenatal Consultation

seismic response of pile-supported structures considering the coupling of inertial and kinematic interactions in different soil sites

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FRONTIERs OF sTRUCTURAL AND CIVIL ENGINEERING 2024年第9期18卷 1350-1361页

作者： Zhao, Huiling Zhang, fan shanghai Univ Dept Civil Engn Shanghai 200444 Peoples R China

Dynamic soil-pile-superstructure interaction is crucial for understanding pile behavior in earthquake-prone ground. Evaluating the safety of piles requires determining the seismic bending moment caused by combined inertial and kinematic interactions, which is challenging. This paper addresses this problem through numerical simulations of piles in different soil sites, considering soil nonlinearity. Results reveal that the period of the soil site significantly affects the interaction among soil, piles, and structures. Bending moments in soft and hard soil sites exceed those in medium soil sites by more than twice. Deformation modes of piles exhibit distinct characteristics between hard and soft soil sites. soft soil sites exhibit a singular inflection point, while hard soil sites show two inflection points. In soft soil sites, pile-soil kinematic interaction gradually increases bending moment from tip to head, with minor influence from superstructure's inertial interaction. In hard soil sites, significant inertial effects from soil, even surpassing pile-soil kinematic effects near the tip, lead to reversed superposition bending moment. superstructure's inertial interaction notably impacts pile head in hard soil sites. A simplified coupling method is proposed using correlation coefficient to represent inertial and kinematic interactions. These findings provide insights into complex seismic interactions among soil, piles, and structures.

关键词： pile seismic response soft soil inertial interaction kinematic interaction PsEUDOsTATIC APPROACH sTRUCTURE sYsTEMs CYCLIC MOBILITY BEHAVIOR MODEL

Bi_(2)WO_(6)/AgIns_(2)s-scheme heterojunction:Efficient photodegradation of organic pollutant and toxicity evaluation

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Journal of Materials science & Technology 2024年第3期170卷 200-211页

作者： Yanyan Zhao Xu fan Hongxing Zheng Enzhou Liu Jun fan Xuejun Wang College of Biology Pharmacy and Food Engineering Shangluo UniversityShangluo 726000China QinLing-Bashan Mountains Bioresources Comprehensive Development C.I.C. Shaanxi University of TechnologyHanzhong 723001China school of Chemical Engineering Northwest UniversityXi’an 710069China

Constructing of heterojunction was identified as a feasible way to improve photocatalytic activity of *** this work,a n-p type Bi_(2)WO_(6)/AgIns_(2)s-scheme heterojunction was successfully prepared for organic pollutants *** Bi_(2)WO_(6)/AgIns_(2)s-scheme heterojunction exhibited much higher pho-tocatalytic activity towards Rhodamine B(92.24%,expose to visible light for 60 min),norfloxacin(81.73%,expose to visible light for 90 min)and levofloxacin(87.46%,expose to visible light for 90 min)than pure Bi_(2)WO_(6)and pure AgIns_(2).Toxicity analysis indicated the low environmental toxicity of Rhodamine B degradation intermediates for Rye seeds and sudangrass seeds germination and *** study displayed that AgIns_(2)and Bi_(2)WO_(6)work as the primary photocatalyst to form·O_(2)−and ·OH,*** improved photocatalytic activity of the Bi_(2)WO_(6)/AgIns_(2)s-scheme heterojunction was due to the im-proved light response range and intensified carrier separation ***,a s-scheme charge transfer mechanism including multiple charge transfer channels was *** work could provide an effective strategy for organic pollutants degradation in wastewater.

关键词： Photocatalysis s-scheme heterojunction AgIns_(2) Bi_(2)WO_(6) Toxicity experiments

Bioinspired metal-organic framework nanozyme reinforced with thermosensitive hydrogel for regulating inflammatory responses in Parkinson’s disease

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Nano Research 2024年第2期17卷 858-865页

作者： Xiaowan fan Tao Zhang Xin Ding Yushuo Gu Qing Li Wei Jiang Kelong fan Nanozyme Medical Center Academy of Medical ScienceZhengzhou UniversityZhengzhou 450001China Department Central-China Branch of National Center for Cardiovascular DiseasesHean Cardiovascular Disease CenterFuwai Central-China HospitalCentral China Fuwai Hospital of Zhengzhou UniversityZhengzhou 450046China Application Center for Precision Medicine the Second Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China CAs Engineering Laboratory for Nanozyme Key Laboratory of Protein and Peptide PharmaceuticalsInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China University of Chinese Academy of sciences Beijing 101408China Department of General surgery Strategic Support Force Medical CenterBeijing 100101China Department of Anesthesiology Pain and Perioperative MedicineThe First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

Parkinson’s disease(PD)is a prevalent neurodegenerative disorder accompanied by movement disorders and neuroinflammatory ***-inflammatory intervention to regulate oxidative stress in the brain is beneficial for managing ***,traditional natural antioxidants have failed to meet the clinical treatment demands due to insufficient activity and ***,Cu-doping zeolite imidazolate framework-8(ZIF-8)nanozyme is designed to simulate Cu/Zn superoxide dismutase(sOD)by biomimetic *** nanozyme composite is then integrated into thermosensitive hydrogel(poly(lactic-co-glycolic acid)-poly(ethylene glycol)-poly(lactic-co-glycolic acid)(PLGA-PEG-PLGA))to form an effective antioxidant system(Cu-ZIF@Hydrogel).The thermosensitive hydrogel incorporating nanozymes demonstrate distinct viscoelastic properties aimed at enhancing local nanozyme adhesion,prolonging nanozyme retention time,and modulating antioxidant activity,thus significantly improving the bioavailability of *** the cellular and animal levels of PD,we find that Cu-ZIF@Hydrogel bypass the blood-brain barrier and efficiently accumulate in the nerve ***,the Cu-ZIF@Hydrogel significantly alleviate the PD’s behavioral and pathological symptoms by reducing the neuroinflammatory levels in the lesion ***,the hydrogel-incorporating nanozyme system holds great potential as a simple and reliable avenue for managing PD.

关键词： bioinspired nanozyme thermosensitive hydrogel Parkinson’s disease oxidative stress neuroinflammatory

Metagenomic Insight Reveals the Microbial structure and Function of the Full-scale Coking Wastewater Treatment system:Gene-Based Nitrogen Removal

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Engineering 2024年第5期36卷 76-89页

作者： Jiaying Ma fan Wang Haifeng fan Enchao Li Huaqiang Chu Xuefei Zhou Yalei Zhang state Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China shanghai Institute of Pollution Control and Ecological security Tongji UniversityShanghai 200092China Baowu Water Technology Co. Ltd.Shanghai 201999China

Microbial communities play crucial roles in pollutant removal and system stability in biological systems for coking wastewater(CWW)treatment,but a comprehensive understanding of their structure and functions is still lacking.A five month survey of four sequential bioreactors,anoxic 1/oxic 1/anoxic 2/oxic 2(A1/O1/A2/O2),was carried out in a full-scale CWW treatment system in China to elucidate operational performance and microbial *** results showed that A1/O1/A2/O2 had excellent and stable performance for nitrogen *** total nitrogen(TN;(17.38±6.89)mgL1)and ammonium-nitrogen(NH4 t-N;(2.10±1.34)mg·L^(-1))in the final biological effluent satisfied the Chinese national standards for *** analysis of 16s ribosome RNA(rRNA)sequencing and metagenomic sequencing showed that the bacterial communities and metagenomic function profiles of A1 and O1 shared similar functional structures,while those of A2 significantly varied from those of other bioreactors(psults indicated that microbial activity was strongly connected with activated sludge ***,Nitrosomonas,and sM1A02 were responsible for nitrification during the primary anoxic-oxic(AO)stage and Azoarcus and Thauera acted as important denitrifiers in *** cycling-related enzymes and genes work in the A1/O1/A2/O2 ***,the hao genes catalyzing hydroxylamine dehydrogenase(EC 1.***.2.6)and the napA and napB genes catalyzing nitrate reductase(EC 1.***.6.1)played important roles in the nitrification and denitrification processes in the primary and secondary AO stages,*** mixed liquor suspended solids(MLss)/total solids(Ts),TN removal rate(RR),total organic carbon(TOC)(RR),and NH_(4)^(+)t-N(RR)were the most important environmental factors for regulating the structure of core bacterial genera and nitrogen-cycling *** were the potential main participants in nitrogen metabolism in the A1/O1/A2/O2 system for CWW *** study prov

关键词： Coking wastewater Full-scale Microbial community Metagenomic sequencing Nitrogen-cycling genes Environmental factor

Observation of an upward lightning flash with 21 upward positive leaders initiated from different wind turbines in wind farm

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High Voltage 2024年第1期9卷 163-171页

作者： Li Cai Yifeng Ke Wenchao fan Ruisheng Yan Mi Zhou Jianguo Wang Yadong fan Engineering Research Center of Ministry of Education for Lightning Protection and Grounding Technology School of Electrical Engineering and AutomationWuhan UniversityWuhanChina

As the wind turbine height increases,the probability of multiple upward leaders flashes within the wind farm *** this study,an upward lightning flash containing 21 upward positive leaders(UPLs)initiated from different wind turbines in Zhangbei Wind Farm was *** average speed of the UPLs was 1.2×10^(5) m/s,which mostly decreased to zero before reaching the cloud *** four UPLs developed to cloud height,with prolonged periods of bright light on three of them and with a minimum duration of 126 ms.A total of nine return strokes occurred on the other two dissipated leader channels,and the numbers of strokes on the two channels was six and three,*** average interstroke interval for the return strokes was 10.5 *** of these nine return strokes had peak currents smaller than 10 *** high-speed video frames confirmed that competition does exist between the UPLs,and the range of shielding effects increases as the height of the ULs *** effect of fan rotation on the initiation of upward leaders and the shielding effect between the wind turbines and upward leaders are discussed.

关键词： flash return initiated

Process in laser drilling of deep microholes without taper on metal materials

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science China(Technological sciences) 2024年第1期67卷 37-59页

作者： fan RunZe MEI Xuesong CUI JianLei state Key Laboratory for Manufacturing systems Engineering Xi’an Jiaotong UniversityXi’an 710054China

Deep microhole machining is currently a prominent research area within the aerospace field,encompassing blade film cooling and fuel injection control ***,taper defects in metal materials may lead to performance degradation or even structural damage over a component’s *** and helical drilling,facilitated by ultrashort pulse lasers,have proven more suitable for achieving high-precision,deep holes in metal ***,excessive repetition rates can also result in severe thermal *** methods are commonly employed for controlling taper,including parameter optimization,assistance,and secondary *** laser beam drilling is widely utilized and has been integrated into relevant machining systems for commercial *** deep microholes include film cooling holes and injection *** drilling is a potential machining method for new materials in the aerospace *** laser drilling processing has been studied,numerous related scientific challenges and technical difficulties must be addressed before practical implementation.

关键词： aerospace laser drilling deep microhole taper control

Electrochemical deposition of Li_(2)s_(2)/Li_(2)s in aprotic Li–s batteries

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Particuology 2024年第7期90卷 516-521页

作者： Zhifeng Yao Xiaozhong fan Long Kong school of Civil Engineering Xi'an University of Architecture&TechnologyXi'an 710055China Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi'an 710129China

Lithium–sulfur(Li–s)batteries stand out the energy storage systems because of extremely high energy density(2600 W h Kg−1)and low-cost sulfur ***,the sluggish deposition from liquid Li polysulfides(LiPss)to solid Li2s leads to mild power density and short cycle *** and regulating Li_(2)s_(2)/Li2s deposition are conceived to be importance to deliver second-plateau capacity in acceptable kinetics,which has the potential to operation Li–s batteries under electrolyte-lean *** perspective aims to summarize the proposed models that can describe the nucleation and propagation of three-dimensional Li_(2)s_(2)/Li2s,as well as affords critical views how electrolyte dictates LiPs conversion from liquid to *** hopes to encourage necessary scaffold strategies and electrolyte formulations to further improve energy density and life span of Li–s batteries.

关键词： Lithium–sulfur batteries Electrolyte Li_(2)s precipitation Characterization