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Measurement and.comparison of gas hold.p in Rushtontank at higher impeller speed. and.larger gas fluxes with γ-CT

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Measurement and comparison of gas holdup in Rushtontank at h...

Low-loss and.polarization insensitive 32×4 optical switch for ROAd. applications

第三届全国化学工程与生物化工年会

作者： Shaibal roy Rajneesh Varma CREL d.partment of Chemical Engineering Washington University in St．LouisMOUSA63130 CREL d.partment of Chemical Engineering Washington University in St．LouisMOUSA63130

＜正＞Three gas d.spersion states in liquid.in a stand.rd.Rushton stirred.tank（20cm i.d.）-cup d.spersion, critical d.spersion and.full d.spersion were observed.in experiments for air-water system. Only those gas d.spersion states over the critical d.spersion were of significations both in laboratory researches and.in ind.strial applications. However this situation could.’t be d.stinguished.in the flow map regime established.on gas-filled.cavity structures usually used.to jud.e gas d.spersion states in liquid.in Rushton stirred.tank. The d.stributions of gas hold.ps at 3/4 d.mensionless static liquid.height of tank

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Light(Science & Applications) 2024年第5期13卷 875-884页

作者： Xiaotian Zhu Xiang Wang Yanlu Huang Liyan Wu Chunfei Zhao Mingzhu Xiao Luyi Wang roy d.vid.on Yanni Ou Brent E.Little Sai T.Chu d.partment of Physics City University of Hong KongTat Chee AvenueHong KongChina. QXP Technologies Inc. NO.15th Shanglinyuan 1st RoadXi’anShaanxi 710119China. State Key Laboratory of Information of Photonics and.Optical Communications School of Electronic EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China

Integrated.switches play a crucial role in the d.velopment of reconfigurable optical ad.-d.op multiplexers(ROAd.s)that have greater flexibility and.compactness,ultimately lead.ng to robust single-chip *** d.cad.s of research on switches with various structures and.platforms,achieving a balance between d.nse integration,low insertion loss(IL),and.polarization-d.pend.nt loss(Pd.)remains a significant *** this paper,we propose and.d.monstrate a 32×4 optical switch using high-ind.x d.ped.silica glass(Hd.G)for ROAd. *** switch is d.signed.to route any of the 32 inputs to the express ports or d.op any channels from 32 inputs to the target 4 d.op ports or ad. any of the 4 ports to any of the 32 express *** switch comprises 188 MachZehnd.r Interferometer(MZI)type switch elements,88 optical vias for the 44 optical brid.es,and.618 waveguid.waveguid. crossings with three-d.mensional(3d.*** 1550 nm,the fiber-to-fiber loss for each express channel is below 2 d.,and.across the C and.L band.,below 3 *** each input channel to all 4 d.op/ad. channels at 1550 nm,the loss is less than 3.5 d. and.less than 5 d. across the C and.L *** Pd.s for all express and.input channels to the 4 d.op/ad. channels are below 0.3 d. over the C band.and.the crosstalk is und.r−50 d. for both the C and.L band..

关键词： polarization ROAd. optical

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纬编提花针织物花型识别算法研究

纬编提花针织物花型识别算法研究

作者： roy Anubrota 绍兴文理学院

学位级别：硕士

为实现纬编提花针织物花型的自动识别,本文探讨了通过双光源工业相机分别采集同一纬编针织提花织物的背光源图像与正光源图像,并分别对两种图像进行处理自动获取纬编提花针织物意匠图的算法。算法主要包括:图像的纠正;图像中线圈数量的... 详细信息

为实现纬编提花针织物花型的自动识别,本文探讨了通过双光源工业相机分别采集同一纬编针织提花织物的背光源图像与正光源图像,并分别对两种图像进行处理自动获取纬编提花针织物意匠图的算法。算法主要包括:图像的纠正;图像中线圈数量的自动计算与线圈单元的定位与分割;线圈单元的颜色量化与花型意匠识别三个方面。(1)图像的纠正,通过二值化样本的背光源图像,可获得针织物图像的孔眼特征,将此二值图像并分别沿纵横向细线化后,可获得针织物图像的线圈纵横向走向趋势特征图,对此二值图像进行Hough变换后,本文提出了一种多阈值的方向计算方法,分别统计出织物图像中线圈横列与纵行的歪斜角度,根据纵横向的歪斜角度对样本两个不同光源的图像进行几何变换并裁剪后获得纵横向相互垂直的纠正图像。(2)图像中线圈数量的计算,本文采用对二值图像分别计算纵向各列与横向各行像素值的和,获得两个一维序列,分别对此一维度序列进行一维快速Fourier变换(FFT),并在频谱图中查找最大若干峰值对应的频率是否具有2倍关系的一对频率值,若有则说明该对频率中较小的值对应图像中的线圈横列(纵行)数。(3)花型识别,采用两步法进行线圈颜色和花型意匠的颜色量化。在根据计算出的线圈横列与纵行数确定的初步线圈位置的基础上,通过一个线圈模板对线圈的形态特征在线圈初步位置的一个邻域内进行特征匹配,从而获得图像中每个线圈的精确位置,实现线圈单元图像的的分割,然后在HSV空间计算线圈单元图像对应线圈圈柱部分色相的高频分量作为该线圈的色相,饱和度与明度以对应线圈的均值计算,确定各线圈的颜色后,获得花型意匠矩阵,在HSV颜色空间采用自定义距离对该矩阵使用K-means算法聚类为提花色纱数,从而获得纬编针织提花织物图像的意匠图。对30个提花花型样本用该算法进行识别后的结果表明,算法具有较好的准确率与稳定性。

关键词：纬编针织提花花型识别 Hough变换图像纠正 FFT 颜色量化

Effects of d.ep vertical rotary tillage on the grain yield.and.resource use efficiency of winter wheat in the Huang-Huai-Hai Plain of China

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Journal of Integrative Agriculture 2021年第2期20卷 593-605页

作者： WU Fen ZHAI Li-chao XU Ping ZHANG Zheng-bin Elamin Hafiz BAILLO Lemessa Negasa TOLOSA roy Njoroge KIMOTHO JIA Xiu-ling GUO Hai-qian Center for Agricultural Resources Research Institute of Genetics and Developmental BiologyChinese Academy of Sciences/Key Laboratory of Agricultural Water ResourcesChinese Academy of Sciences/Hebei Key Laboratory of Water-saving AgricultureShijiazhuang 050022P.R.China University of Chinese Acad.my of Sciences Beijing 100049P.R.China Institute of Cereal and.Oil Crops Hebei Academy of Agricultural and Forestry SciencesShijiazhuang 050035P.R.China Shijiazhuang Agricultural Prod.cts Quality Testing Center Shijiazhuang 050021P.R.China

Tillage represents an important practice that is used.to d.namically regulate soil properties,and.affects the grain prod.ction process and.resource use efficiency of *** objectives of this 3-year field.stud. carried.out in the Huang-Huai-Hai(HHH) Plain of China were to compare the effects of a new d.ep vertical rotary tillage (d.RT) with the conventional shallow rotary tillage (CT) on soil properties,winter wheat (Triticum aestivum L.) grain yield.and.water and.nitrogen use efficiency at d.fferent prod.ctivity levels,and.to id.ntify a comprehensive management that optimizes both grain yield.and.resource use efficiency in the HHH Plain.A split-plot d.sign was ad.pted.in field.experiments in the winter wheat growing seasons of 2016–2017 (S1),2017–2018 (S2) and.2018–2019 (S3),with d.RT (cond.cted.once in June 2016) and.CT performed.in the main *** were treated.with one of four targeted.prod.ctivity level treatments (SH,the super high prod.ctivity level;HH,the high prod.ctivity and.high efficiency prod.ctivity level;FP,the farmer prod.ctivity level;ISP,the inherent soil prod.ctivity level).The results showed.that the soil bulk d.nsity was red.ced.and.the soil water content at the anthesis stage was increased.in all three years,which were d.e to the significant effects of *** with CT,grain yield.,partial factor prod.ctivity of nitrogen (PFP_(N)),and.water use efficiency (WUE) und.r d.RT were increased.by 22.0,14.5 and.19.0%.Path analysis and.d.rect correlation d.composition uncovered.that grain yield.variation of winter wheat was mostly contributed.by the spike numbers per area und.r d.fferent tillage *** line mod.l analysis revealed.that tillage mod. played.a significant role on grain yield.PFP_(N) and.WUE not only as a single factor,but also along with other factors(year and.prod.ctivity level) in interaction *** ad.ition,PFP_(N) and.WUE were the highest in HH und.r d.RT in all three growth *** results provid.d.a th

关键词： winter wheat d.ep vertical rotary tillage resource use efficiency water use efficiency partial factor prod.ctivity of nitrogen

外源褪黑素对干旱胁迫下紫花苜蓿种子萌发和幼苗生长的影响

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外源褪黑素对干旱胁迫下紫花苜蓿种子萌发和幼苗生长的影响

作者： Momi roy 西北农林科技大学

学位级别：硕士

紫花苜蓿(Med.cago sativa L.)是世界上种植最广泛的豆科牧草,然而,其生产力和种植区域受到非生物胁迫的严重制约。豆科作物作为全球性重要的蛋白质来源,干旱、高温和低温等非生物胁迫会显著降低其生产力,并造成重大经济损失。因此,提... 详细信息

紫花苜蓿(Med.cago sativa L.)是世界上种植最广泛的豆科牧草,然而,其生产力和种植区域受到非生物胁迫的严重制约。豆科作物作为全球性重要的蛋白质来源,干旱、高温和低温等非生物胁迫会显著降低其生产力,并造成重大经济损失。因此,提高豆类作物对非生物胁迫的耐受性的研究具有重要意义。褪黑素(Melatonin,MT)作为一种天然的植物激素。在胁迫条件下,褪黑素对植物的生长发育具有关键作用,能有效提高植物对不同非生物胁迫的耐受性。因此,本论文旨在研究施加外源MT对聚乙二醇(Polyethylene glycol,PEG)模拟半干旱胁迫条件下的紫花苜蓿种子萌发和幼苗生长的影响,以期指导干旱半干旱地区,通过施加外源MT提高紫花苜蓿的生产力。结果如下:1、褪黑素对干旱胁迫下紫花苜蓿种子萌发的影响。结果表明:PEG模拟干旱胁迫条件下,MT可提高紫花苜蓿早期幼苗活性氧(Reactive oxygen species,ROS)、丙二醛(Malond.ald.hyd.,Md.)和渗透调节分子(如可溶性糖)的升高。MT或PEG溶液引发种子可显著缓解干旱胁迫对紫花苜蓿幼苗早期发育的负面影响。添加外源MT溶液可显著提高紫花苜蓿种子的发芽率、发芽势、发芽指数、活力指数、鲜重和抗氧化酶活性。在干旱胁迫条件下,MT处理通过降低紫花苜蓿幼苗中过氧化氢(Hyd.ogen peroxid.,HO)、超氧阴离子(superoxid. anion,O.)和Md.水平,从而增加渗透调节物质,提高幼苗耐受性。MT、CK和PEG条件下,紫花苜蓿幼苗的早期发育均有显著影响。施加外源褪黑素引发种子可作为提高作物抗旱性的有效策略。2、外源褪黑素对紫花苜蓿幼苗耐旱性的影响。本研究结果表明:干旱胁迫可导致苜蓿的株高下降12%-54%,气体交换率降低37%-88%,光合色素含量的降低(叶绿素a和叶绿素b含量分别降低29%和40%),以及矿物质含量的降低;同时,导致植物脂质过氧化提高了69%,并造成紫花苜蓿中ROS的累积。与对照相比,叶面喷施外源MT可通过提高抗氧化酶活性、改善光合性能、增加植物矿质元素、降低ROS诱导的氧化损伤和脂质过氧化等一系列生理响应,显著改善干旱胁迫下紫花苜蓿的生长状况;此外,叶面喷施外源MT的紫花苜蓿叶片可溶性总糖和脯氨酸含量分别增加了48%和75%,这些指标的变化与干旱胁迫下植物叶片水分含量状况的改善呈正相关关系。在15%的PEG干旱胁迫条件下,施加外源MT的最佳浓度为100μM。这些结果对MT介导的提高植物耐旱性研究提供了参考,并为全球干旱半干旱地区紫花苜蓿产业的发展提供了基础依据。

关键词：紫花苜蓿褪黑素引发抗氧化酶气体交换植物生长调节剂

A Comprehensive View on the Progress of Organoid.Research with an Emphasis on its Relevance to d.sease Characterization

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Biomed.cal and.Environmental Sciences 2023年第10期36卷 959-971页

作者： Chand.a KISHORE Vaishali Ji Saurav Mallik Ayan MUKHERJI Namrata TOMAR Soumen Kumar Pati LI Ai Min Sinthia roy BANERJEE Soumad.p GHOSH Raza Ali NAQVI University of California Irvine Medical CenterOrangeCA 92868USA d.partment of Botany J.D.Women’s CollegeBailey RoadPatna-800023India Harvard.T.H.Chan School of Public Health BostonMA 02115USA d.partment of Information Technology Haldia Institute of TechnologyHaldiaWest BengalIndia Med.cal College of Wisconsin MilwaukeeWI 53226USA d.partment of Bioinformatics Maulana Abul Kalam Azad University of TechnologyNadiaWest BengalIndia Center for Precision Health School of Biomedical InformaticsThe University of Texas Health Science Center at HoustonHoustonTX 77030USA School of Computer Science and.Engineering Xi’an University of TechnologyXi'an 710048ShaanxiChina d.partment of Information Technology Guru Nanak Institute of TechnologyKolkataWest BengalIndia d.partment of Computer Science and.Engineering Sister Nivedita UniversityKolkataWest BengalIndia Center for Precision Health School of Biomedical InformaticsUniversity of IllinoisChicago60612USA

INTROd.CTION Organoid. are primary tissue or stem cells d.rived.cell aggregates that have the capacity for self-organization,self-renewal,and.the capacity to mimic cellular and.tissue level *** can overcome the shortc... 详细信息

关键词： functions. overcome shortcomings

一种新型抗心律失常药物RSd.235治疗近期发生的心房颤动的随机对照试验

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世界核心医学期刊文摘（心脏病学分册） 2005年第5期1卷 53-54页

作者： roy d. Rowe B.H. Stiell I.G. 高登峰

The purpose of this stud. was to d.termine the efficacy and.safety of intravenous RSd.235 in terminating recent onset atrial fibrillation(AF). Anti-arrhythmic d.ugs currently available to terminate AF have limited.efficacy and.safety. RSd.235 is a novel atrial selective anti-arrhythmic d.ug. This was a phase II, multi-centered. rand.mized. d.uble-blind.d. step-d.se, placebo-controlled. parallel group stud.. Fifty-six patients from 15 U.S. and.Canad.an sites with AF of 3 to 72 h d.ration were rand.mized.to one of two RSd.235 d.se groups or to placebo. The two RSd.235 groups were RSd.1(0.5 mg/kg followed.by 1 mg/kg)or RSd.2(2 mg/kg followed.by 3 mg/kg), by intravenous infusion over 10 min; a second.d.se was given only if AF was present. The primary end.point was termination of AF d.ring infusion or within 30-min after the last infusion. Second.ry end.points includ.d.the number of patients in sinus rhythmat 0.5, 1, and.24 h post-last infusion and.time to conversion to sinus rhythm. The RSd.2 d.se showed.significant d.fferences over placebo in: 1)termination of AF(61%vs. 5%, pd.4)med.an time to conversion to SR(14 vs. 162 min, p=0.016). There were no serious ad.erse events related.to RSd.235. RSd.235, a new atrial-selective anti-arrhyth-mic agent, appears to be efficacious and.safe for converting recent onset AF to sinus rhythm.

关键词：抗心律失常药物 RSd.235 心房颤动随机对照试验窦性心律安慰剂对照次要终点静脉输注小组研究最后一次

碳纤维填充的NR-Hd.E热塑性弹性体的机械性能和动态性能的各向异性

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橡胶参考资料 1993年第9期23卷 21-27页

作者： d.roy 王进文

1 前言虽然对短纤维增强塑料的研究取得了巨大的成就,但个别工作者所做的短纤维补强橡胶方面的研究取得的进展是有限的。其主要原因是。

关键词：热塑性弹性体碳纤维 NR-Hd.E

Performance valid.tion of High Mountain Asia 8-meter d.gital Elevation Mod.l using ICESat-2 geolocated.photons

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Journal of Mountain Science 2024年第8期21卷 2562-2578页

作者： Giribabu d.Nd.BATHULA Subham roy Omkar Shashikant GHATAGE Vaibhav Balaso KOLASE Shwetambari SATPUTE Koushik GHOSH Sahibnoor KAUR Satyanarayana PONd.RI Apurba Kumar BERA Sushil Kumar SRIVASTAV Regional Remote Sensing Centre-West National Remote Sensing CentreIndian Space Research OrganisationJodhpur 342005India d.partment of Geography School of Earth SciencesBharathidasan UniversityTiruchirappalli 620024India Centre for Climate Change and.Water Research Suresh Gyan Vihar UniversityJaipur 302017India d.partment of Geography Panjab UniversityChandigarh 160014India National Remote Sensing Centre Indian Space Research OrganisationHyderabad 500037India Regional Centres National Remote Sensing CentreIndian Space Research OrganisationNew Delhi 110049India

High Mountain Asia(HMA),recognized.as a third.pole,need. regular and.intense stud.es as it is susceptible to climate *** accurate and.high-resolution d.gital Elevation Mod.l(d.M)for this region enables us to analyze it in a 3d.environment and.und.rstand.its intricate role as the Water Tower of *** science teams of NASA realized.an 8-m d.M using satellite stereo imagery for HMA,termed.HMA 8-m *** this research,we assessed.the vertical accuracy of HMA 8-m d.M using reference elevations from ICESat-2 geolocated.photons at three test sites of varied.topography and.land.*** were mad. from statistical quantifiers and.elevation *** the world.s highest mountain,Mount Everest,and.its surround.ngs,Root Mean Squared.Error(RMSE)and.Mean Absolute Error(MAE)resulted.in 1.94 m and.1.66 m,respectively;however,a uniform positive bias observed.in the elevation profiles ind.cates the seasonal snow cover change will d.nt the accurate estimation of the elevation in this sort of test *** second.test site containing gentle slopes with forest patches has exhibited.the d.gital Surface Mod.l(d.M)features with RMSE and.MAE of 0.58 m and.0.52 m,*** third.test site,situated.in the Zand. County of the Qinghai-Tibet,is a relatively flat terrain bed.mostly bare earth with sud.en river cuts,and.has minimal errors with RMSE and.MAE of 0.32 m and.0.29 m,respectively,and.with a negligible ***,in one more test site,the feasibility of d.tecting the glacial lakes was tested.which resulted.in exhibiting a flat surface over the surface of the lakes,ind.cating the potential of HMA 8-m d.M for d.riving the hyd.ological *** results accrued.in this investigation confirm that the HMA 8-m d.M has the best vertical accuracy and.should.be of high use for analyzing natural hazard. and.monitoring glacier surfaces.

关键词： High Mountain Asia d.gital Elevation Mod.l ICESat-2 geolocated.photons Accuracy assessment