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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 584-596页

作者： Mithu sarkar Bidyadhar Subudhi Sandip Ghosh G H Raisoni College of Engineering Nagpur 440016India Indian Institute of Technology Goa-403401India Indian Institute of Technology Banaras Hindu University(BHU)Varanasi 221005India

Inter-area low frequency oscillation in power system is one of the major problems for bulk power transmission through weak tie *** of wide-area signal is more effective than the local area signal in damping out the inter-area *** area measurement system(WAMS)is convenient to transmit the wide area signal through the communication channel to the remote *** failure is one of the disastrous phenomena in a communication *** this paper,a dual input single output(DISO)Hm controller is designed to build the control resiliency by employing two highest observability ranking wide area signals with respect to the critical damping inter-area *** proposed controller can provide sufficient damping to the system and also the system remains stabilized if one of the wide-area signals is *** time delay is an unwanted phenomenon that degrades the performance of the *** unified Smith predictor approach is used to design a Hm controller to handle the time ***'s two-area and IEEE-39 bus test systems are considered to verify the effectiveness of the proposed *** the simulation results,it is verified that,the proposed controller provides excellent damping performance at normal communication and improves the controller resiliency to counteract the communication failure.

关键词： Communication failure dual input single output(DISO)controller H_∞control inter-area oscillation unified Smith predictor

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A Tone-Deaf Approach

China Today 2022年第5期71卷 45-47页

作者： SUDESHNA sarkar 不详

Why the EU-China Summit failed to meet the EU’s expectation...and so would other such talks.T was both extraordinary and incredible to hear EU High Representative for Foreign Affairs and Security Policy Josep Borell,who along with European Council President Charles Michel and European Commission President Ursula von der Leyen took part in the 23rd EU-China Summit on April 1,describe the meeting as"a dialogue of the deaf."No doubt from the European Union’s point of view the dialogue with Chinese President Xi Jinpingand Premier Li Keqiang was fruitless and unsatisfactory but to equate lack of results to communication with the hearing impaired smacks of a medieval mindset not expected from its top *** this is the language of diplomacy,then no wonder the EU has been so singularly inept at negotiating a peaceful resolution to the Ukraine crisis.

关键词： Borel expectation impaired

Keeping Trade Shipshape

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China Today 2022年第1期71卷 54-56页

作者： SUDESHNA sarkar 不详

Hamburg remains a key platform to bring China and Europe *** every new year brings changes in its course,in 2022 there is certainly one change that we can already put a face to:Germany has a new chancellor after 16 ye... 详细信息

关键词： Trade Ship chance

Seismic behavior of batter pile groups embedded in liquefiable soil

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Earthquake Engineering and Engineering Vibration 2021年第3期20卷 583-604页

作者： J.S.Rajeswari Rajib sarkar Department of Civil Engineering Indian Institute of Technology(ISM)DhanbadDhanbad 826004India

A comparative study of the seismic performance of 2×1 pile groups considering different degrees of batter(0°for vertical,10°and 20°)embedded in single homogeneous liquefiable sand through fully coupled three-dimensional dynamic analyses is *** effects of inertial interaction are considered with structures having two different *** performance of pile groups is investigated for the fixed and pinned pile to cap connections for both floating and end bearing types of pile *** ratios of piles were also varied to enable a comprehensive *** have been carried out for three earthquake motions having varied dominant *** is observed that batter pile groups in liquefiable soils provide beneficial effects on piles and superstructure responses for both fixed and pinned head pile to cap connections for long period ***,for short period structures,a beneficial effect is most evident for fixed head connection.

关键词： batter pile liquefaction period of structure pile to cap connection slenderness ratio

Syn-sedimentary tectonics and facies analysis in a rift setting: Cretaceous Dalmiapuram Formation, Cauvery Basin, SE India

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Journal of Palaeogeography 2018年第2期7卷 146-167页

作者： Nivedita Chakraborty Subir sarkar Department of Geology Kabi Jagadram Roy Govt. General Degree College Department of Geological Sciences Jadavpur University

The Cretaceous(Albian-Cenomanian) Dalmiapuram Formation is one of the economically significant constituents in the hydrocarbon-producing Cauvery rift basin, SE India that opened up during the Late Jurassic e Early Cretaceous Gondwanaland fragmentation. The fossil-rich Dalmiapuram Formation,exposed at Ariyalur within the Pondicherry sub-basin of Cauvery Basin, rests in most places directly on the Archean basement and locally on the Lower Cretaceous(Barremian-Aptian) Basal Siliciclastic Formation. In the Dalmiapuram Formation, a facies association of tectonically-disturbed phase is sandwiched between two drastically quieter phases. The early syn-rift facies association(FA 1), records the first carbonate marine transgression within the basin, comprising a bar-lagoon system with occasionally storms affecting along the shore and a sheet-like non-recurrent biomicritic limestone bed on the shallow shelf that laterally grades into pyrite e glauconite-bearing dark-colored shale in the deeper shelf. Spectacular breccias together with varied kinds of mass-flow products comprise the syn-rift facies association(FA 2). While the breccias occur at the basin margin area, the latter extend in the deeper inland sea. Clast composition of the coarse clastics includes large, even block-sized limestone fragments and small fragments of granite and sandstone from the *** beds of quieter intervals between tectonic pulses occur in alternation with them. Faulted basal contact of the formation, and small grabens filled by multiple mass-flow packages bear the clear signature of the syntectonic activity localized contortions, slump folds, and pillow beds associated with mega slump/slide planes and joints, which corroborates this contention further. This phase of tectonic intervention is followed by another relatively quieter phase and accommodates the late syn-rift facies association(FA 3). A tidal bar-interbar shelf depositional system allowed a transgressive systems tract motif to gr

关键词： Syn-sedimentary tectonics Facies analysis Carbonate shelf Cretaceous Dalmiapuram Formation Cauvery Basin

Treading on Solid Ice

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China Today 2022年第2期71卷 52-55页

作者： SUDESHNA sarkar 不详

THIRTY years ago when Michael Berger went to ski in Heilongjiang,China’s northeasternmost province,it was an underdeveloped region shivering from icy winds from Siberia and far from being a bustling tourist *** when Michael Berger,now ***,and the commercial counselor at the Austrian Embassy in China,recently visited a string of new ski resorts in northeast China,which is comprised of Heilongjiang,Jilin,and Liaoning,he was stunned by what he calls the“incredible development and quality of these modern installations.”

关键词： resort string Siberia

Làoùil y a des affaires,une voie est possible

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今日中国（法文版） 2022年第5期60卷 52-54页

作者： SUDESHNA sarkar 不详

Analysis of flow over backward facing step with transition

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Frontiers of Structural and Civil Engineering 2015年第1期9卷 71-81页

作者： Dwarikanath RATHA Arindam sarkar Civil Engineering Department Thapar University Patiala Punjab 147001 India School of Infrastructure Indian Institute of Technology Bhubaneswar 751013 India

The present study deals with the study of the velocity distribution and the separation phenomenon of flow of air over a two dimensional backward facing step. The flow of air over a backward facing step has been investigated numerically using FLUENT. Flow simulation has been carried out in a backward facing step having an expansion ratio （ratio of the height before and after the step） of 1：1.94 and the results obtained are compared with the published experimental results. Comparison of flow characteristics between steps with three different transitions is made. The variation ofreattachment length for all the three cases are analyzed for wide range of Reynolds number ranging from 100 to 7000 which covers the laminar, transition and turbulent flow of air. Simulation of the flow over steps with expansion ratios of 1：1.24, 1：1.38, 1：1.47, 1：1.53, 1：1.94, 1：2.20 are also carried out to examine the effect of different expansion ratios on the reattachment length. It is found that the primary reattachment length increases with increase in the expansion ratio. The primary reattachment length at the bottom wall downstream of the step is minimum for the step with round edged transition and maximum for the step with a vertical drop transition.

关键词： Reattachment length backward facing step transition flow separation k-ε model

Improvement of Early Maturing and Climate Resilient Chickpea (Cicer arietinum L.) Cultivars Suitable for Multiple Environments in Bangladesh

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Phyton-International Journal of Experimental Botany 2023年第3期92卷 883-899页

作者： Aktar-Uz-Zaman Ariful Islam Shahin Iqbal Jahangir Alam Debashish sarkar Bander Albogami Ahmed Gaber Akbar Hossain Pulses Research Centre Bangladesh Agricultural Research InstituteIshurdiPabna6600Bangladesh On-Farm Research Division Bangladesh Agricultural Research InstitutePabna6600Bangladesh Department of Biology College of ScienceTaif UniversityTaif21944Saudi Arabia Division of Soil Science Bangladesh Wheat and Maize Research InstituteDinajpur5200Bangladesh

Ensuring food security for the rapidly increasing population and changing climatic scenarios are requisites for exploiting the genetic divergence of food crops.A study was undertaken to sort out an early maturing chickpea variety for fitting easily between rice-rice cropping systems in the Eastern Indo-Gangetic Plain of *** trial was comprised of eight elite lines of chickpea and executed at various localities in Bangladesh from 2014–15 to 2017–*** result explored the chickpea genotype,BARI Chola-11 remained superior to the rest of the elite genotypes for having a short maturity period(100–106 days),and lesser days to 50%flowering(47–55 days).The same genotype was recorded to have robust vegetative and reproductive yield attributes including plant height(49–57 cm),podsplant−1(37–50),and optimum 100 seed weight(19.5–20.6 g).Owing to better yield attributes,BARI Chola-11 resulted in the maximum seed yield(1200–1500 kg ha-1)of chickpea and might be recommended for general adoption in the region for boosting nutritional security status through improved productivity under changing climate.

关键词： Short-duration variety multi-location yield trial high yielding variety GGE biplot analysis preliminary yield trial super early type

Overprint of neotectonism along the course of River Chel,North Bengal,India

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Journal of Palaeogeography 2016年第3期5卷 221-240页

作者： Sunipa Mandal Subir sarkar Department of Geological Sciences Jadavpur University

This paper aims to unveit neotectonic imprints in topography, drainage and sediments in the 46.25 km tong course of the River Chet from its source down to its attuvial fan at the base of the Himatayan Mountain Front in the Darjeeting-Jatpaiguri districts of India. A semi-circutar ridge detimits its primary catchment. Within confinement of this watershed basin the drainage pattern is composite being convergent atong the periphery and divergent on a butte inside. AtE these geomorphic neotectonic imprints are accom- panied by ramp and fiat structures and spectacutar mytonitization of rocks. High hypsometric index and convex shape of the hypsometric curve derived from the centrat near-straight course of the river between the primary catchment and the Main Frontat Thrust （MFT） atso reftects tectonic youthfutness of the river course. It is wett manifested atso in widety variabte stream index and stream gradient index ratios （SL/K） often exceeding 2. In response to neotectonism, this river course as a whore shifted westward between 1962 and 2007. Maximum reduction of the stream gradient on top of the MFT is etoquent enough about recent uptift of the thrust ridge. The high average stope gradient of canyon watt about 45.68° is wett consistent with this uptift. Very tow channet-width/vaUey-height ratio along the river further corroborates the uptift. The attuviat fan system of the River Chet is comprised of five morphogenetic fans stacked one above another with a tendency to shrink and shift progressively upstope. They differ from each other in terms of titt, axiat orientation, primary depositionat surface gradient and convexity in transverse section and thus present a writ of ongoing tectonism. Progressive upward increase in the share of distat crystattine rocks in ctast composition within attuviat fan package is a dear proxy for southerty advancement of the MFT. Concomitant increase in maximum ctast size is in good agreement with sediment source uptift. Art the five fans

关键词： Uptift of Main Frontat Thrust Neotectonism Hypsometric index Stream-sradient index,Atluviat fan system evotution Fan attributes Ctast size and composition