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Application of fractal theory in assessing soil aggregates in Indian tropical ecosystems

Journal of Forestry Research 2012年第3期23卷 355-364页

作者： s.k.Tripathi C.P.kushwaha s.k.basu Computer science Department Banaras Hindu UniversityVaranasi-221005India Department of Forestry Mizoram UniversityAi-zawl-796009India Centre for Env.sci.&Tech. Banaras Hindu UniversityVaranasi-221005India

soil aggregation varies according to climatic and manage- ment factors, and is difficult to measure because of irregular shapes and sizes of soil aggregates. We applied fractal theory to assess soil aggrega- tion as affected by （1） land use change from forest to savanna, （2） nutri- ent additions in forest, ecotone, and savanna ecosystems, and （3） tillage practice and residue treatments in an agro-ecosystem. We used fractal dimensions nonlinear （D,o,-lin） and linear （Dlin） based on number of ag- gregates （N） and mass of aggregates （M）（the range of values were 2.6-2.89 and 2.694.41, respectively） to capture the variations in the sizes of soil aggregates due to land use and treatments/management in these ecosystems. The variation in the values of non-linear fractal dimension based on mass （DMnon-lin） was smaller in forest and savanna ecosystems with and without nutrient additions, while the variation was wider in agro-ecosystems with different management practices. Linear fractal dimensions based on number （Dr^i,） and mass （DMlin） of aggregates var- ied marginally in these ecosystems and did not capture the variations in soil aggregates well. The variations in non-linear fractal dimension indi- cate that continued nitrogen loading in forest accelerates the formation of macro-aggregates, whereas in savanna the situation was reversed. The values of non-linear fractal dimensions did not show significant change after 6 years of nutrient additions in the ecotone; reflecting a buffering mechanism of this system in soil aggregate formation. On the basis of non-linear fractal dimension values, we conclude that residue retention and minimum tillage are appropriate for proper maintenance of soil ag- gregate stability for sustained crop production in the Indian dry land agro-ecosystems

关键词： soil aggregates fractal tillage practice ecosystem Indian dry tropics

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青霉素发酵中的自动化

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国外医药(抗生素分册) 1983年第5期 361-366页

作者： s.k.basu 周光邠

自从四十年前青霉素成为一个十分有效的抗生素以来,青霉素产生菌的改良和发酵工艺的改进,都取得不少进展;因而使生产成本明显下降,并促进深入研究和发展了医学上应用的广谱半合成青霉素。一般地说,新菌株具有不同的代谢特性,需要在工艺... 详细信息

自从四十年前青霉素成为一个十分有效的抗生素以来,青霉素产生菌的改良和发酵工艺的改进,都取得不少进展;因而使生产成本明显下降,并促进深入研究和发展了医学上应用的广谱半合成青霉素。一般地说,新菌株具有不同的代谢特性,需要在工艺条件上作新的调整才能发挥其生物合成潜力。了解新菌株的特性以及如何控制以充分利用该菌株的生产能力是至关重要的。

关键词：青霉素发酵摄氧率生产率比生长率方程式方程

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旋风分离器的理论及设计

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石油化工设备 1977年第4期 71-84页

作者： s.Rajagopalan ,s.k.basu ,方剑藻北京东方红炼油厂

本文引用了在旋风分离器领域中进行的实验研究和数学分析,力图确定有效工作的旋风分离器的最佳尺寸和形状。文中列示了气体在旋风分离器不同点的流动图型、静压以及三个速反分量。用无因次数群的数学分析法研究了旋风分离器内粉尘分... 详细信息

本文引用了在旋风分离器领域中进行的实验研究和数学分析,力图确定有效工作的旋风分离器的最佳尺寸和形状。文中列示了气体在旋风分离器不同点的流动图型、静压以及三个速反分量。用无因次数群的数学分析法研究了旋风分离器内粉尘分离的机理以及气体流速、压力降、和旋风分离器几何尺寸之间的关联。基于以上的数学分析,用诺模图来选择已知负荷的旋风分离器。

关键词：旋风分离器粉尘效率曲线常数分离效率数学分析沙克龙分离设备废物数学切向速度进口速度头

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新型的煤矿井下接地保护电路

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煤矿安全 1983年第8期 57-62页

作者： D·k·Mittra s·k·basu R·k·Mondal 吴百谷 [印度]

一、引言在煤矿井下大多采用中性点限流供电系统(系指英、印等国一编者注),即在电源变压器的中性点与大地之间接一限流电抗器。在发生接地故障时,电抗器能有效地限制故障电流及故障点释放的能量,从而消除或大大减小电弧所导致的瓦斯爆... 详细信息

一、引言在煤矿井下大多采用中性点限流供电系统(系指英、印等国一编者注),即在电源变压器的中性点与大地之间接一限流电抗器。在发生接地故障时,电抗器能有效地限制故障电流及故障点释放的能量,从而消除或大大减小电弧所导致的瓦斯爆炸和火灾危害。例如,中性点电抗为1000Ω时,可将550V

关键词：接地保护 CBT 继电保护接地故障电气故障中性点接地继电器接地装置煤矿井下

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臭氧在中试喷射染色机染色聚酯织物后整理中的应用

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国际纺织导报 2021年第3期49卷 19-21页

作者： M.G.Parikh B.C.Chauhan s.k.basu 何静静(译) 罗艳(校) 人造纺织品研究协会印度不详

研究了臭氧在染色聚酯织物后整理中的应用。该应用在小型喷射染色机上进行。将臭氧注射入喷射染色浴,还原清理处理在同一台机器上进行,并作为参考。比较了还原处理和臭氧氧化清洗两种方法所得织物的耐摩擦色牢度和耐洗色牢度。结果表明... 详细信息

研究了臭氧在染色聚酯织物后整理中的应用。该应用在小型喷射染色机上进行。将臭氧注射入喷射染色浴,还原清理处理在同一台机器上进行,并作为参考。比较了还原处理和臭氧氧化清洗两种方法所得织物的耐摩擦色牢度和耐洗色牢度。结果表明,臭氧处理试样的耐摩擦色牢度和耐洗色牢度与还原清洗试样相当,且臭氧处理更经济、能耗更低且污染更小。

关键词：臭氧清洗染色聚酯

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Ferrite features in simulated transition zone of EH36 shipbuilding steel submerged arc welded by CaF_(2)-siO_(2)-MnO fluxes

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Journal of Iron and steel Research International 2024年第4期31卷 790-796页

作者： Ming Zhong Dong Hu Da-ming Guo somnath basu Cong Wang key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina school of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina The state key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Metallurgical Engineering and Materials science Indian Institute of Technology BombayMumbai 400076MaharashtraIndia

Ferrite features in the simulated transition zone welded with CaF_(2)-siO_(2)-MnO fluxes containing various MnO contents have been *** laser scanning microscopy has been applied to simulate the thermal cycling of the transition zone and the phase transformations during cooling have been in-situ *** has been found that the appearance temperature for ferrite side plate decreases with increasing Mn content in the weld metals caused by MnO content ***,growth rates for both ferrite side plate and acicular ferrite are significantly enhanced with a higher Mn content of weld ***,from the statistical fractions of salient microstructures,for all samples,the acicular ferrite,grain boundary ferrite,and polygonal ferrite take over more than 90%.It has also been demonstrated that with the increase in Mn content,the ferrite side plate fraction increases slightly from 5%to 10%and the acicular ferrite fraction shows a tendency of first increasing and then decreasing,which experiences the maximum with the flux containing 30 wt.%*** phenomenon is believed to be controlled by the O and Mn contents in weld metals synergistically.

关键词： submerged arc welding Transition zone Phase transformation Microstructure

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Optimal Bidding strategies of Microgrid with Demand side Management for Economic Emission Dispatch Incorporating Uncertainty and Outage of Renewable Energy sources

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Energy Engineering 2024年第4期121卷 849-867页

作者： Mousumi basu Chitralekha Jena Baseem khan Ahmed Ali Department of Power Engineering Jadavpur UniversityJadavpurIndia school of Electrical Engineering KIIT UniversityBhubaneswarIndia Department of Electrical and Computer Engineering Hawassa UniversityHawassaEthiopia Department of Electrical and Electronic Engineering Technology Faculty of Engineering and the Built EnvironmentUniversity of JohannesburgJohannesburgSouth Africa

In the restructured electricity market,microgrid(MG),with the incorporation of smart grid technologies,distributed energy resources(DERs),a pumped-storage-hydraulic(PsH)unit,and a demand response program(DRP),is a smarter and more reliable electricity *** consists of gas turbines and renewable energy sources such as photovoltaic systems and wind *** bidding strategies,prepared by MG operators,decrease the electricity cost and emissions from upstream grid and conventional and renewable energy sources(REs).But it is inefficient due to the very high sporadic characteristics of REs and the very high outage *** solve these issues,this study suggests non-dominated sorting genetic algorithm Ⅱ(NsGA-Ⅱ)for an optimal bidding strategy considering pumped hydroelectric energy storage and DRP based on outage conditions and uncertainties of renewable energy *** uncertainty related to solar and wind units is modeled using lognormal and Weibull probability ***-based DRP is used,especially considering the time of outages along with the time of peak loads and prices,to enhance the reliability of MG and reduce costs and emissions.

关键词： Micro-grid distributed energy resources demand response program uncertainty outage

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Association between people’s attitudes towards human-elephant conflict and their locational,demographic,and socio-economic characteristics in Buxa Tiger Reserve and its adjoining area,India

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Regional sustainability 2024年第1期5卷 11-25页

作者： Chiranjib NAD Tamal basu-ROY Department of Geography Raiganj UniversityRaiganj733134India

“Human-elephant conflict(HEC)”,the alarming issue,in present day context has attracted the attention of environmentalists and policy *** rising conflict between human beings and wild elephants is common in Buxa Tiger Reserve(BTR)and its adjoining area in West Bengal state,India,making the area ***’s attitudes towards elephant conservation activity are very crucial to get rid of HEC,because people’s proximity with wild elephants’habitat can trigger the occurrence of *** aim of this study is to conduct an in-depth investigation about the association of people’s attitudes towards HEC with their locational,demographic,and socio-economic characteristics in BTR and its adjoining area by using Pearson’s bivariate chi-square test and binary logistic regression *** is one of the constituent parts of Eastern Doors Elephant Reserve(EDER).We interviewed 500 respondents to understand their perceptions to HEC and investigated their locational,demographic,and socio-economic characteristics including location of village,gender,age,ethnicity,religion,caste,poverty level,education level,primary occupation,secondary occupation,household type,and source of *** results indicate that respondents who are living in enclave forest villages(EFVs),peripheral forest villages(PFVs),corridor village(CVs),or forest and corridor villages(FCVs),mainly males,at the age of 18–48 years old,engaged with agriculture occupation,and living in kancha and mixed houses,have more likelihood to witness ***,respondents who are illiterate or at primary education level are more likely to regard elephant as a main problematic animal around their villages and refuse to participate in elephant conservation *** the sake of a sustainable environment for both human beings and wildlife,people’s attitudes towards elephants must be friendly in a more prudent way,so that the two communities can live in harmony.

关键词： Human-elephant conflict Elephant conservation Chi-square test statistics Binary logistic regression Demographic and socioeconomic characteristics Buxa Tiger Reserve

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Understanding the corrosion and bio-corrosion behaviour of Magnesium composites – a critical review

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Journal of Magnesium and Alloys 2024年第3期12卷 890-939页

作者： Prithivirajan sekar s.k.Panigrahi Department of Mechanical Engineering Indian Institute of Technology MadrasChennai600036India Applied Magnesium Research Center Center of Excellence in Materials and Manufacturing for Futuristic MobilityIndian Institute of Technology MadrasChennai600036India

Realising the potential of Magnesium(Mg),several globally leading ventures have invested in the Mg industry,but their relatively poor corrosion resistance is a never ending saga till *** corrosion and bio-corrosion behaviour of Mg has gained research attention and still remains a hot topic in the application of automobile,aerospace and biomedical *** intrinsic high electrochemical nature of Mg limits their utilization in diverse *** scenario has prompted the development of Mg composites with an aim to achieve superior corrosion and bio-corrosion *** present review enlightens the influence of grain size(Gs),secondary phase,texture,type of matrix and reinforcement on the corrosion and bio-corrosion behaviour of Mg ***,the corrosion and bio-corrosion behaviour of Mg composites manufactured by primary and secondary processing routes are ***,the comprehensive corrosion and bio-corrosion mechanisms of these Mg composites are ***,the individual role of Gs,texture and corrosive medium on corrosion and bio-corrosion behaviour of Mg composites are clarified and *** challenges encountered,unanswered issues in this field are explained in detail and accordingly the scope for future research is *** review is presented from basic concrete background to advanced corrosion mechanisms with an aim of creating interest among the readers like students,researchers and industry experts from various research ***,the corrosion and bio-corrosion behaviour of Mg composites are critically reviewed for the first time to:(i)contribute to the body of knowledge,(ii)foster research and development,(iii)make breakthrough,and(iv)create life changing innovations in the field of Mg composite corrosion.

关键词： Corrosion Bio corrosion Magnesium alloys Magnesium composites Magnesium implants.

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Enhancing Multicriteria-Based Recommendations by Alleviating scalability and sparsity Issues Using Collaborative Denoising Autoencoder

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Computers, Materials & Continua 2024年第2期78卷 2269-2286页

作者： s.Abinaya k.Uttej kumar school of Computer science&Engineering Vellore Institute of TechnologyChennaiTamilnadu600127India

A Recommender system(Rs)is a crucial part of several firms,particularly those involved in *** conventional Rs,a user may only offer a single rating for an item-that is insufficient to perceive consumer ***,businesses in industries like e-learning and tourism enable customers to rate a product using a variety of factors to comprehend customers’*** the other hand,the collaborative filtering(CF)algorithm utilizing AutoEncoder(AE)is seen to be effective in identifying user-interested ***,the cost of these computations increases nonlinearly as the number of items and users *** triumph over the issues,a novel expanded stacked autoencoder(EsAE)with kernel Fuzzy C-Means Clustering(kFCM)technique is proposed with two *** the first phase of offline,the sparse multicriteria rating matrix is smoothened to a complete matrix by predicting the users’intact rating by the EsAE approach and users are clustered using the kFCM *** the next phase of online,the top-N recommendation prediction is made by the EsAE approach involving only the most similar user from multiple *** the EsAE_kFCM model upgrades the prediction accuracy of 98.2%in Top-N recommendation with a minimized recommendation generation *** experimental check on the Yahoo!Movies(YM)movie dataset and TripAdvisor(TA)travel dataset confirmed that the EsAE_kFCM model constantly outperforms conventional Rs algorithms on a variety of assessment measures.

关键词： Recommender systems multicriteria rating collaborative filtering sparsity issue scalability issue stacked-autoencoder kernel Fuzzy C-Means Clustering

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