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Chinese Physics B 2021年第4期30卷 555-564页

作者： Archana V Lakshmi mohan Kathirvel P Saravanakumar S Department of Sciences Amrita School of EngineeringCoimbatoreAmrita Vishwa VidyapeethamIndia Research and Development Center Bharathiar UniversityCoimbatore-641046TamilnaduIndia GRD Center for Materials Research Department of PhysicsP S G College of TechnologyCoimbatore-641004TamilnaduIndia Department of Physics N S S CollegePandalam-689501KeralaIndia

Tin oxide(SnO_(2)) and iron-doped tin oxide(Sn_(1-x)Fe_(x)O_(2),x=0.05 wt%,0.10 wt%) nanoparticles are synthesized by the simple sol-gel *** structural characterization using x-ray diffraction(XRD) confirms tetragonal rutile phases of the *** variations in lattice parameters and relative intensity with Fe-doping concentration validate the incorporation of iron into the *** compressive strain present in the lattice estimated by using peak profile analysis through using Williamson-Hall plot also exhibits the influence of grain boundary formation in the *** radiative recombination and quenching observed in optical characterization by using photoluminescence spectrum(PL) and the shift in the band gap estimated from UV-visible diffused reflectance spectrum corroborate the grain boundary *** spectrum and the morphological analysis by using a field emission scanning electron microscope(FESEM) also indicate the formation of grain *** compositional analysis by using energy dispersive x-ray spectrum(EDAX) confirms Fe in the SnO_(2) *** conductivity studies exhibit that the impendence increases with doping concentration increasing and the loss factor decreases at high frequencies with doping concentration increasing,which makes the Sn_(1-x)Fe_(x)O_(2) a potential candidate for device applications.

关键词： sol-gel compressive strain grain boundary AC conductivity

疫情感知严重性与抑郁情绪的关系:一个有联合调节的中介模型

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心理科学 2024年第4期47卷 998-1007页

作者：高峰强韩婷桑墨涵展艳茹韩磊山东师范大学心理学院济南250014

重大突发公共卫生事件会增加人们的抑郁情绪。本研究基于应激和应对的交互理论探究疫情感知严重性对抑郁情绪的预测作用,以及网络疑病、反刍思维和性别在其中的作用。在疫情爆发后采用问卷法通过网络收集了503名被试的数据。结果发现,(1... 详细信息

重大突发公共卫生事件会增加人们的抑郁情绪。本研究基于应激和应对的交互理论探究疫情感知严重性对抑郁情绪的预测作用,以及网络疑病、反刍思维和性别在其中的作用。在疫情爆发后采用问卷法通过网络收集了503名被试的数据。结果发现,(1)疫情感知严重性越强,个体的抑郁情绪水平越高;(2)网络疑病在疫情感知严重性与抑郁情绪的关系中起中介作用;(3)反刍思维调节了网络疑病与抑郁情绪的关系,反刍思维和性别联合调节了疫情感知严重性与抑郁情绪的关系。本研究拓展了应激与抑郁关系的理论,并且对于降低疫情对个体抑郁情绪的消极影响具有一定的启示。

关键词：疫情感知严重性抑郁情绪网络疑病反刍思维性别

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高校文化创意产品设计研究

工业设计 2024年第1期 28-31页

作者：李漠寒程旭锋北京林业大学艺术设计学院北京100083

高校文化创意产品是校园文化的重要载体,其存在功能性不强、同质化严重、系列化程度较低等问题,不利于校园文化的传播,因此需要探索高校文化创意产品设计的思路,以提升校园文化的传播效率。文章通过分析高校文化创意产品的现存问题,提... 详细信息

高校文化创意产品是校园文化的重要载体,其存在功能性不强、同质化严重、系列化程度较低等问题,不利于校园文化的传播,因此需要探索高校文化创意产品设计的思路,以提升校园文化的传播效率。文章通过分析高校文化创意产品的现存问题,提出高校文化创意产品设计的思路,以此进行设计实践并对方案进行评估。以期为高校文化创意产品设计提供参考,增强高校文化的影响力。

关键词：工业设计产品设计文化创意产品高校文化

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Prediction and Minimization of the Heat Treatment Induced Distortion in 8620H Steel Gear:Simulation and Experimental Verification

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Chinese Journal of Mechanical Engineering 2022年第6期35卷 207-218页

作者： Wen Shao mohan Yi Jinyuan Tang Siyuan Sun State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China

The considerable heat treatment induced runout value in the end face of the automobile main reducer gear is always dimensionally out of *** directly affects the dimensional accuracy,the grade of carburized and hardened gears,and the post-quenching manufacturing *** this study,three dimensional numerical models were developed to simulate the carburizing-quenching process of gear based on the multi-field coupling theory using DEFORM *** results indicated that the ununiform cooling rate of the gear caused by the asymmetry of the web structure would result in the ununiform distribution of martensite,leading to the large runout value at the end face of the ***,a novel method was proposed to minimize the heat treatment induced runout *** was found that the heat treatment induced runout value could be effectively controlled by the addition of a compensation ring and the support of a rod *** experiments showed that the average runout value of the gear end face before and after the proposed heat treatment method were about 0.023 mm and 0.059 mm respectively,which was in good agreement with the simulated *** novel approach proposed in this study led to a reduction of the gear runout value by 70.0%‒76.9%compared to that of the original heat treatment process,which may serve as a practical and economical way to predict and minimize the heat treatment induced distortion in drive gear.

关键词： Distortion Carburizing-quenching Numerical simulation Heat treatment 8620H steel gear

钠-葡萄糖共转运蛋白受体选择性对钠-葡萄糖共转运蛋白2抑制剂引起2型糖尿病患者骨折的影响:系统综述与网状Meta分析

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中华糖尿病杂志 2024年第9期16卷 1029-1039页

作者：郭泽一刘凤琪赵厚宇栗墨涵张译詹思延孙凤北京大学公共卫生学院北京100191 北京大学公共卫生学院流行病与卫生统计学系重大疾病流行病学教育部重点实验室(北京大学)北京100191 北京大学护理学院北京100191

目的系统评价受体选择性对钠-葡萄糖共转运蛋白2抑制剂(SGLT2i)引起2型糖尿病(T2DM)患者发生骨折风险的影响。方法检索美国国立医学图书馆数据库(PubMed)、医学文摘数据库(EMbase)、Clinical trials和Cochrane循证医学数据库(Cochrane L... 详细信息

目的系统评价受体选择性对钠-葡萄糖共转运蛋白2抑制剂(SGLT2i)引起2型糖尿病(T2DM)患者发生骨折风险的影响。方法检索美国国立医学图书馆数据库(PubMed)、医学文摘数据库(EMbase)、Clinical trials和Cochrane循证医学数据库(Cochrane Library)中自建库以来至2023年6月30日收录的涉及T2DM患者使用SGLT2i类药物,且报告了骨折结局的所有随机对照试验。经过筛选后提取纳入文献的相关信息,对纳入文献进行传统Meta分析,随后将涉及的SGLT2i类药物按其对受体的位点选择性分为高选择性[药物对于钠-葡萄糖共转运蛋白(SGLT)1/2位点IC50的比值≥900]和低选择性(药物对于SGLT 1/2位点IC50的比值<900)两组,并将对照分为其他降糖药组和安慰剂组,以上4组进行网状Meta分析。结果最终纳入44篇文献,总样本量为52276例。传统Meta分析结果显示,非SGLT2i干预措施与SGLT2i类药物引起T2DM患者骨折的风险差异无统计学意义(OR=1.07,95%CI 0.88~1.30)。网状Meta结果显示,与安慰剂相比,高选择性SGLT2i(OR=0.94,95%CI 0.64~1.38)和低选择性SGLT2i(OR=1.19,95%CI 0.76~1.88)T2DM患者的骨折发生风险差异均无统计学意义,且高选择性SGLT2i和低选择性SGLT2i相比骨折风险差异也无统计学意义(OR=0.79,95%CI 0.44~1.40)。结论T2DM患者使用SGLT2i类药物并未发现骨折风险增加,且SGLT2i类药物的骨折风险不受该类药物受体位点选择性差异的影响。

关键词：糖尿病,2型钠-葡萄糖共转运蛋白2抑制剂骨折网状Meta分析

VARIABLE MESH FINITE DIFFERENCE METHOD FOR SELF-ADJOINT SINGULARLY PERTURBED TWO-POINT BOUNDARY VALUE PROBLEMS

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Journal of Computational Mathematics 2010年第5期28卷 711-724页

作者： mohan K.Kadalbajoo Devendra Kumar Department of Mathematics & Statistics

A numerical method based on finite difference method with variable mesh is given for self-adjoint singularly perturbed two-point boundary value problems. To obtain parameter- uniform convergence, a variable mesh is constructed, which is dense in the boundary layer region and coarse in the outer region. The uniform convergence analysis of the method is discussed. The original problem is reduced to its normal form and the reduced problem is solved by finite difference method taking variable mesh. To support the efficiency of the method, several numerical examples have been considered.

关键词： Singularly perturbed boundary value problems Finite difference method,Boundary layer Parameter uniform-convergence Variable mesh.

Soft Computing Based Discriminator Model for Glaucoma Diagnosis

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Computer Systems Science & Engineering 2022年第9期42卷 867-880页

作者： Anisha Rebinth S.mohan Kumar Department of Information Science and Engineering NHCEVisvesvaraya Technological UniversityBangaloreIndia Department of Computer Science and Engineering Nagarjuna College of Engineering and TechnologyBangaloreIndia

In this study, a Discriminator Model for Glaucoma Diagnosis (DMGD)using soft computing techniques is presented. As the biomedical images such asfundus images are often acquired in high resolution, the Region of Interest (ROI)for glaucoma diagnosis must be selected at first to reduce the complexity of anysystem. The DMGD system uses a series of pre-processing;initial cropping by thegreen channel’s intensity, Spatially Weighted Fuzzy C Means (SWFCM), bloodvessel detection and removal by Gaussian Derivative Filters (GDF) and inpaintingalgorithms. Once the ROI has been selected, the numerical features such as colour, spatial domain features from Local Binary Pattern (LBP) and frequencydomain features from LAWS are generated from the corresponding ROI forfurther classification using kernel based Support Vector Machine (SVM). TheDMGD system performances are validated using four fundus image databases;ORIGA, RIM-ONE, DRISHTI-GS1, and HRF with four different kernels;LinearKernel (LK), Polynomial Kernel (PK), Radial Basis Function (RBFK) kernel,Quadratic Kernel (QK) based SVM classifiers. Results show that the DMGD system classifies the fundus images accurately using the multiple features and kernelbased classifies from the properly segmented ROI.

关键词： Glaucoma support vector classification clustering technique spatial domain and frequency domain features

Impact of frailty on endoscopic retrograde cholangiopancreatography outcomes in nonagenarians:A United States national experience

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World Journal of Gastrointestinal Endoscopy 2024年第3期16卷 148-156页

作者： Sanket Dhirubhai Basida Dushyant Singh Dahiya Muhammad Nadeem Yousaf Brinda Basida Bhanu Siva mohan Pinnam Manesh Kumar Gangwani Hassam Ali Sahib Singh Yash R Shah Daksh Ahluwalia Mihir Prakash Shah Saurabh Chandan Neil R Sharma Shyam Thakkar Department of Internal Medicine University of Missouri-ColumbiaColumbiaMO 65212United States Division of Gastroenterology Hepatology&MotilityThe University of Kansas School of MedicineKansas CityKS 66160United States Division of Gastroenterology and Hepatology University of MissouriColumbiaMO 65212United States Department of Rheumatology Medical College of GeorgiaAugusta UniversityNorth AugustaGA 30912United States Department of Internal Medicine John H.Stroger Hospital of Cook CountyChicagoIL 60612United States Department of Internal Medicine The University of ToledoToledoOH 43606United States Division of Gastroenterology and Hepatology East Carolina University/Brody School of MedicineGreenvilleNC 27858United States Department of Internal Medicine Sinai HospitalBaltimoreMD 21215United States Department of Internal Medicine Trinity Health Oakland/Wayne State UniversityPontiacMI 48341United States Division of Gastroenterology and Hepatology Creighton University School of MedicineOmahaNE 68131United States Division of Interventional Oncology&Surgical Endoscopy GI Oncology Tumor Site TeamParkview Cancer InstituteParkview HealthFort WayneIN 46845United States Section of Gastroenterology&Hepatology West Virginia University School of MedicineMorgantownWV 26505United States

BACKGROUND Endoscopic retrograde cholangiopancreatography(ERCP)is an essential therapeutic tool for biliary and pancreatic *** and elderly patients,especially those aged≥90 years are generally considered a higher-risk population for ERCP-related *** To investigate outcomes of ERCP in the Non-agenarian population(≥90 years)concerning *** This is a cohort study using the 2018-2020 National Readmission *** aged≥90 were identified who underwent ERCP,using the international classification of diseases-10 code with clinical *** Hopkins’s adjusted clinical groups frailty indicator was used to classify patients as frail and *** primary outcome was mortality,and the secondary outcomes were morbidity and the 30 d readmission rate related to *** used univariate and multivariate regression models for *** A total of 9448 patients were admitted for any indications of *** and non-frail patients were 3445(36.46%)and 6003(63.53%)*** for ERCP were Choledocholithiasis(74.84%),Biliary pancreatitis(9.19%),Pancreatico-biliary cancer(7.6%),Biliary stricture(4.84%),and Cholangitis(1.51%).Mortality rates were higher in frail group[adjusted odds ratio(aOR)=1.68,P=0.02].The Intra-procedural complications were insigni-ficant between the two groups which included bleeding(aOR=0.72,P=0.67),accidental punctures/lacerations(aOR=0.77,P=0.5),and mechanical ventilation rates(aOR=1.19,P=0.6).Post-ERCP complication rate was similar for bleeding(aOR=0.72,P=0.41)and post-ERCP pancreatitis(aOR=1.4,P=0.44).Frail patients had a longer length of stay(6.7 d vs 5.5 d)and higher mean total charges of hospitalization($78807 vs$71392)compared to controls(P<0.001).The 30 d all-cause readmission rates between frail and non-frail patients were similar(P=0.96).CONCLUSION There was a significantly higher mortality risk and healthcare burden amongst nonagenarian frail patients undergoing ERCP compared

关键词： Endoscopic retrograde cholangiopancreatography Nonagenarians Frailty Mortality Healthcare burden

Wind pollination in Pinus roxburghii

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Progress in Natural Science:Materials International 2007年第1期17卷 32-38页

作者： Vinod Prasad KHANDURI Chandra mohan SHARMA Department of Forestry Mizoram University Aizawl(Mizoram)India Department of Forestry HNB Garhwal University Srinagar Garhwal-246 174(Uttaranchal)India

Stigmatic pollen load and pollen concentration in the air were studied in the natural population of Pinus roxburghii at Ashtavakra (900 m asl), in the Pauri forest division of Garhwal Himalaya, India. The results reflect diurnal pollen occurrence in P. roxburghii , with the strong significant correlations between pollen concentrations in the air and wind speed, air temperature and relative air humidity. A significant correlation was also observed between microsporangium dehiscence and pollen occurrence in the air. The maximum concentration of pollen grains in the air and higher rates of pollen deposition onto the megasporophylls were between 12 pm and 16 pm of the day, which conforms the best time for pollination in a day in P. roxburghii. The receptivity of Ovulate strobili varied from 3 to 5 days, however, the bagged strobili remained receptive up to 6 days.

关键词： ovulate strobili pollen cones pollination receptivity wind speed P. roxburghii.

Dynamics of sea-ice biogeochemistry in the coastal Antarctica during transition from summer to winter

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Geoscience Frontiers 2017年第3期8卷 507-516页

作者： Suhas Shetye Babula Jena Rahul mohan National Institute of Oceanography Donapaula Goa 403004 India National Centre for Antarctic and Ocean Research Headland Sada Goa 403 804 India

The seasonality of carbon dioxide partial pressure （pC02）, air-sea CO2 fluxes and associated environ- mental parameters were investigated in the Antarctic coastal waters. The in-situ survey was carried out from the austral summer till the onset of winter （January 2012, February 2010 and March 2009） in the Enderby Basin. Rapid decrease in pCO2 was evident under the sea-ice cover in January, when both water column and sea-ice algal activity resulted in the removal of nutrients and dissolved inorganic carbon （DIC） and increase in pH. The major highlight of this study is the shift in the dominant biogeochemica/ factors from summer to early winter. Nutrient limitation （low Si/N）, sea-ice cover, low photosynthetically active radiation （PAR）, deep mixed layer and high upwelling velocity contributed towards higher pCO2 during March （early winter）. CO2 fluxes suggest that the Enderby Basin acts as a strong CO2 sink during January （-81 mmol m-2 d 1）, however it acts as a weak sink of CO2 with -2.4 and -1.7 mmol m 2 d-1 during February and March, respectively. The present work, concludes that sea ice plays a dual role towards climate change, by decreasing sea surface pCO2 in summer and enhancing in early winter. Our observations emphasize the need to address seasonal sea-ice driven CO2 flux dynamics in assessing Antarctic contributions to the global oceanic CO2 budget.

关键词： pCO2 fluxes Upwelling Antarctica Sea-ice