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2009年全国高分子学术论文报告会

作者： aanand sundararaman Krishnan Venkatasubbaiah Frieder Jkle Department of Chemistry Rutgers-NewarkNJUSA 07102

＜正＞Thiophene-and fluorene-based polymers represent two important types of semiconducting materials and their applications in organic light emitting devices,photovoltaics,organic field-effect transistors and chemical sensors have been well ***-deficient triorganoboranes provide interesting characteristics including their ability to act as efficient emitters and charge transport materials in optoelectronic devices and as sensors for *** is desirable to bring together these two classes of building blocks within one system to form a variety of materials with advantageous *** have explored two alternative design principles,（i）the embedding of boron into the conjugated polymer main chain and（ii）the direct attachment of boron as a side group to conjugated *** reactive polymer scaffold PFBBr with alternating fluorene and borane moieties was prepared via B-Sn exchange *** from PFBBr as a universal precursor,we obtained a series of polymers in which we can tune the stability,thermal characteristics,and fluorescence behavior by simple post modification *** an alternative approach we synthesized a family of polythiophenes（PTBAr）with diarylboryl groups as side *** new design principle enriches the synthetic variety,because two pendant groups（Ar）on boron can be used for fine-tuning of the *** addition,unusual photophysical properties arise from the cross conjugation with contributions from the borane side chains.

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Quantum-mechanical effects in photoluminescence from thin crystalline gold films

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Light(Science & Applications) 2024年第4期13卷 783-794页

作者： Alan R.Bowman Alvaro Rodríguez Echarri Fatemeh Kiani Fadil Iyikanat Ted V.Tsoulos Joel D.Cox Ravishankar sundararaman F.Javier García de Abajo Giulia Tagliabue Laboratory of Nanoscience for Energy Technologies(LNET) STIÉcole Polytechnique Fédérale de Lausanne(EPFL)LausanneSwitzerland ICFO–Institut de Ciencies Fotoniques The Barcelona Institute of Science and TechnologyCastelldefels(Barcelona)Spain. MBI–Max-Born-Institut BerlinGermany. POLIMA–Center for Polariton-driven Light–Matter Interactions University of Southern DenmarkOdense MDenmark. Danish Institute for Advanced Study University of Southern DenmarkOdense MDenmark. Department of Materials Science&Engineering Rensselaer Polytechnic InstituteTroyNYUSA. Department of Physics Applied Physicsand AstronomyRensselaer Polytechnic InstituteTroyNYUSA. ICREA–Institucio Catalana de Recerca i Estudis Avancats BarcelonaSpain

Luminescence constitutes a unique source of insight into hot carrier processes in metals,including those in plasmonic nanostructures used for sensing and energy ***,being weak in nature,metal luminescence remains poorly understood,its microscopic origin strongly debated,and its potential for unraveling nanoscale carrier dynamics largely ***,we reveal quantum-mechanical effects in the luminescence emanating from thin monocrystalline gold ***,we present experimental evidence,supported by first-principles simulations,to demonstrate its photoluminescence origin(i.e.,radiative emission from electron/hole recombination)when exciting in the interband *** model allows us to identify changes to the measured gold luminescence due to quantum-mechanical effects as the gold film thickness is ***,such effects are observable in the luminescence signal from flakes up to 40 nm in thickness,associated with the out-of-plane discreteness of the electronic band structure near the Fermi *** qualitatively reproduce the observations with first-principles modeling,thus establishing a unified description of luminescence in gold monocrystalline flakes and enabling its widespread application as a probe of carrier dynamics and light-matter interactions in this *** study paves the way for future explorations of hot carriers and charge-transfer dynamics in a multitude of material systems.

关键词： luminescence quantum crystalline

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A Bi-Polar Triple-Output Converter with Duty Cycle Estimation

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Circuits and Systems 2016年第4期7卷 198-210页

作者： Kumaraswami sundararaman Mahadevan Gopalakrishnan Electrical & Electronics Engineering Department Sri Venkateswara College of Engineering Sriperumbudur India

This paper proposes a triple output converter with buck, boost and inverted outputs and controlled through duty cycle estimation. In the existing converter, to generate the negative output, the power flows from load to the supply (from the boost output to the supply) during a part of the cycle, which increases cycle time and losses, and reduces the power level. To overcome this, a modified converter with a main and an auxiliary inductance and with reduced number of switches is proposed. The converter can operate in continuous and discontinuous conduction modes and the outputs can be independently controlled. An analysis of the converter is done for both modes. A simplified control of the converter through duty cycle estimation is suggested to regulate the outputs, which does not have the constraint that the current ripple has to be small. The control works both in the continuous and discontinuous modes. The simulation results closely match with the analysis. A prototype of the converter is constructed with a Spartan FPGA system and results have been presented.

关键词： Multi-Output Dual Output DC-DC Converter Predictive Control Bi-Polar

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钒卟啉在勘探中的应用:源岩和石油成熟度指标

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国外油气勘探 1994年第2期6卷 172-181页

作者： P.sundararaman 李峥

根据钒卟啉分布导出的卟啉成熟度参数(PMP)是一种优良指标,它可以实现:(1)由海相源岩抽提物识别烃类生成带;(2)由石油(?)定其源岩在排油时的成熟度。测量PMP的方法经济、可靠,且比以前的方法快速,因此可用作常规勘探手段。对于海相有机... 详细信息

根据钒卟啉分布导出的卟啉成熟度参数(PMP)是一种优良指标,它可以实现:(1)由海相源岩抽提物识别烃类生成带;(2)由石油(?)定其源岩在排油时的成熟度。测量PMP的方法经济、可靠,且比以前的方法快速,因此可用作常规勘探手段。对于海相有机质而言,PMP可能是比某些常规方法(如镜质体反射率)更可靠的成熟度标志。常规的成熟度参数大多受控于作用过程,而不是干酪根转化,而引起PMP演变的反应与此不同,它们直接控制沥青的生成以及伴随的干酪根热降解。本文通过对蒙特雷组(加利福尼亚州海域)含水热解产物、泥盆系密西西比系巴肯组页岩(威制斯顿盆地)的源岩沥青以及相当于中新统蒙特雷组的源岩层位(加利福尼亚州圣华金盆地)的测量,介绍了这种方法的应用。在经过研究的所有实例中,PMP都在生烃开始时增大,并随着干酪根分解的进行,发生系统而可预测的增大。对于高硫海相干酪根所生成的石油来说,只要它们未经受后来的储层成熟作用、或者未与源岩外的沥青相混合,那么PMP就可以反映排油时源岩的成熟度。

关键词：生油层成熟度钒卟啉

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A DEVELOPMENTAL FRAMEWORK FOR IMPROVING HURRICANE MODEL PHYSICAL PARAMETERIZATIONS USING AIRCRAFT OBSERVATIONS

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Tropical Cyclone Research and Review 2012年第4期1卷 419-429页

作者： JUN A.ZHANG sundararaman GOPALAKRISHNAN FRANK D.MARKS ROBERT F.ROGERS VIJAY TALLAPRAGADA NOAA/AOML Hurricane Research Division MiamiFLU.S.A. Rosentiel School of Marine and Atmospheric Sciences University of MiamiMiamiFLU.S.A. NOAA/NCEP Environmental Modeling Center DCU.S.A.

As part of NOAA’s Hurricane Forecast Improvement Program(HFIP),this paper addresses the important role of aircraft observations in hurricane model physics validation and improvement.A model developmental framework for improving the physical parameterizations using quality-controlled and post-processed aircraft observations is presented,with steps that include model diagnostics,physics development,physics implementation and further *** deficiencies are first identified through model diagnostics by comparing the simulated axisymmetric multi-scale structures to observational *** physical parameterizations are developed in parallel based on in-situ observational data from specially designed hurricane field *** new physics package is then implemented in the model,which is followed by further *** developmental framework presented here is found to be successful in improving the surface layer and boundary layer parameterization schemes in the operational Hurricane Weather Research and Forecast(HWRF) *** for improving physics packages other than boundary layer scheme are also discussed.

关键词： Hurricane Forecast Improvement Program aircraft observations physical parameterizations

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腹腔结核短程化疗的随机对照临床试验:5年报告

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国际结核病与肺部疾病杂志 1997年第1期 26-32页

作者： R.Balasubramanian M.Nagarajan R.Balambal S.P.Tripathy R.sundararaman P.Venkatesan C.N.Paramasivam P.Rajasambandam N.Rangabashyam R.Prabhakar 杨枕旦 Tuberculosis Research Centre ChetputMadras National AIDS Research institute Pune Tamilanadu Hospital Madras Departments of Medical Gastroenterology surgleal Gastroenterology and proctology Government General HospitalMadrasIndia

目的:评价和比较腹腔结核6个月短程化疗与12个月标准疗程的治疗效果。设计和对象:共193名确诊腹腔结核的成年病人随机分配到2个不同的每日治疗方案中:1)6个月短程化疗组,前2个月使用利福平、异烟肼和吡嗪酰胺,后4个月使用利福平和异烟肼... 详细信息

目的:评价和比较腹腔结核6个月短程化疗与12个月标准疗程的治疗效果。设计和对象:共193名确诊腹腔结核的成年病人随机分配到2个不同的每日治疗方案中:1)6个月短程化疗组,前2个月使用利福平、异烟肼和吡嗪酰胺,后4个月使用利福平和异烟肼(简称6R组),2)12个月标准疗程组,使用乙胺丁醇和异烟肼以及为期2周的链霉素补充治疗(简称12E组)。仅对疑及肠梗阻和肠穿孔的病人施行手术。结果:除30人因各种原因退出外,总共对163人(6R组85人,12E组78人)进行了疗效分析。治疗结束时临床状态恢复正常者6R组有84人(99％),12E组有73人(94％)。其中147人随访5年,无一因腹腔结核复发而需要治疗。结论:在治疗各型腹腔结核中6个月短疗程化疗组的疗效与12个月标准疗程组同样有效。

关键词：短程化疗腹腔结核

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