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Effect of Annealing Temperature on the Morphology and sensitivity of the Zinc Oxide Nanorods-Based Methane senor

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Acta Metallurgica sinica(English Letters) 2014年第4期27卷 593-600页

作者： Biplob Mondal Lachit Dutta Chirosree Roychaudhury Dambarudhar Mohanta Nillohit Mukherjee Hiranmay saha Department of Electronics and Communication Engineering Tezpur UniversityTezpur 784028AssamIndia Department of Electronics and Telecommunication Engineering Bengal Engineering and Science UniversityHowrah 711103India Nanoscience and soft Matter Physics Laboratory Department of PhysicsTezpur UniversityTezpur 784028AssamIndia Center of Excellence for Green Energy and sensors systems Bengal Engineering and Science UniversityHowrah 711103West BengalIndia

ZnO nanorods in the form of thin films were synthesized by a facile chemical route and the effect of annealing temperature on the structure and sensitivity of such ZnO-based sensors was studied in detail towards methane *** analyses of such films were carried out by scanning electron microscopy,whereas,the crystalline structure and phase purity of the films were analysed by X-ray diffraction *** films were observed to display a gradual change in their morphology from granular to dense nanorods and each of them was used to fabricate methane sensor *** were also tested for temperature-dependent methane-sensing capability with varying methane *** optimized sensor exhibited highest gas response of ＊80% at 250 °C with significantly low response and recovery time.

关键词： Chemical synthesis ZnO nanostructures Thin films Annealing temperature Gas sensor structural characterization

Fresh and hardened properties of high-strength concrete incorporating byproduct fine crushed aggregate as partial replacement of natural sand

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Frontiers of structural and Civil Engineering 2021年第1期15卷 124-135页

作者： Dammika P.K.WELLALA Ashish Kumer saha Prabir Kumar sARKER Vinod RAJAYOGAN school of Civil and Mechanical Engineering Curtin UniversityPerthWA 6845Australia Regional Technical Manager HolcimPerthWA 6004Australia

This paper presents the fresh and hardened properties of high-strength concrete comprising byproduct fine crushed aggregates(FCAs)sourced from the crushing of three different types of rocks,namely granophyre,basalt,and *** lowest void contents of the combined fine aggregates were observed when 40%to 60%of natural sand is replaced by the *** the replacement of 40%FCAs,the slump and bleeding of concrete with a water-to-cement ratio of 0.45 decreased by approximately 15%and 50%,respectively,owing to the relatively high fines content of the *** 28 d compressive strength of concrete was 50 MPa when 40%FCAs were *** slight decrease in tensile strength from the FCAs is attributed to the flakiness of the *** correlations between the splitting tensile and compressive strengths of normal concrete provided in the As 3600 and ACI 318 design standards are applicable for concrete using the FCAs as partial replacement of *** maximum 56 d drying shrinkage is 520 microstrains,which is significantly less than the recommended limit of 1000 microstrains by As 3600 for ***,the use of these byproduct FCAs can be considered as a sustainable alternative option for the production of high-strength green concrete.

关键词： fine crushed aggregates quarry dust compressive strength splitting tensile strength drying shrinkage

source Code Prioritization Using Forward slicing for Exposing Critical Elements in a Program

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Journal of Computer science & Technology 2011年第2期26卷 314-327页

作者： Mitrabinda ray Kanhaiya lal Kumawat Durga Prasad Mohapatra Department of Computer science and Engineering National Institute of Technology

Even after thorough testing, a few bugs still remain in a program with moderate complexity. These residual bugs are randomly distributed throughout the code. We have noticed that bugs in some parts of a program cause frequent and severe failures compared to those in other parts. Then, it is necessary to take a decision about what to test more and what to test less within the testing budget. It is possible to prioritize the methods and classes of an object-oriented program according to their potential to cause failures. For this, we propose a program metric called influence metric to find the influence of a program element on the source code. First, we represent the source code into an intermediate graph called extended system dependence graph. Then, forward slicing is applied on a node of the graph to get the influence of that node. The influence metric for a method m in a program shows the number of statements of the program which directly or indirectly use the result produced by method m. We compute the influence metric for a class c based on the influence metric of all its methods. As influence metric is computed statically, it does not show the expected behavior of a class at run time. It is already known that faults in highly executed parts tend to more failures. Therefore, we have considered operational profile to find the average execution time of a class in a system. Then, classes are prioritized in the source code based on influence metric and average execution time. The priority of an element indicates the potential of the element to cause failures. Once all program elements have been prioritized, the testing effort can be apportioned so that the elements causing frequent failures will be tested thoroughly. We have conducted experiments for two well-known case studies -- Library Management system and Trading Automation system -- and successfully identified critical elements in the source code of each case study. We have also conducted experiments to compar

关键词： program slice extended system dependence graph influence of a class test priority

Illumination-Free Clustering Using Improved slime Mould Algorithm for Acute Lymphoblastic Leukemia Image segmentation

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Journal of Bionic Engineering 2023年第6期20卷 2916-2934页

作者： Krishna Gopal Dhal swarnajit ray sudip Barik Arunita Das Department of Computer science and Application Midnapore College(Autonomous)Paschim MedinipurMidnaporeWest BengalIndia Department of Computer science and Engineering Maulana Abul Kalam Azad University of TechnologyKolkataWest BengalIndia Department of Computer science and Engineering Kalyani Government Engineering CollegeKalyaniWest BengalIndia

Partitional clustering techniques such as K-Means(KM),Fuzzy C-Means(FCM),and Rough K-Means(RKM)are very simple and effective techniques for image ***,because their initial cluster centers are randomly determined,it is often seen that certain clusters converge to local *** addition to that,pathology image segmentation is also problematic due to uneven lighting,stain,and camera settings during the microscopic image capturing ***,this study proposes an Improved slime Mould Algorithm(IsMA)based on opposition based learning and differential evolution’s mutation strategy to perform illumination-free White Blood Cell(WBC)*** IsMA helps to overcome the local optima trapping problem of the partitional clustering techniques to some *** paper also performs a depth analysis by considering only color components of many well-known color spaces for clustering to find the effect of illumination over color pathology image *** and visual results encourage the utilization of illumination-free or color component-based clustering approaches for image ***-KM and“ab”color channels of CIELab color space provide best results with above-99%accuracy for only nucleus ***,for entire WBC segmentation,IsMA-KM and the“CbCr”color component of YCbCr color space provide the best results with an accuracy of above 99%.Furthermore,IsMA-KM and IsMA-RKM have the lowest and highest execution times,*** the other hand,IsMA provides competitive outcomes over CEC2019 benchmark test functions compared to recent well-established and efficient Nature-Inspired Optimization Algorithms(NIOAs).

关键词： Pathology image Image segmentation Clustering Color space White blood cell Optimization swarm intelligence Fuzzy clustering Rough clustering

土豆淀粉基杏仁状炭及其非酶检测蔗糖(英文)

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新型炭材料 2015年第3期30卷 244-251页

作者： soma Das Mitali saha Department of Chemistry National Institute of Technology

以土豆淀粉为原料,通过先在400-500℃空气中炭化,再于800℃裂解制备出杏仁状炭（CNA）颗粒,并组装成高灵敏度和选择性的非酶蔗糖传感器。采用扫描电镜、X射线衍射仪、X射线光电子能谱仪、原子力和荧光显微镜对样品进行表征。通过循环伏... 详细信息

以土豆淀粉为原料,通过先在400-500℃空气中炭化,再于800℃裂解制备出杏仁状炭（CNA）颗粒,并组装成高灵敏度和选择性的非酶蔗糖传感器。采用扫描电镜、X射线衍射仪、X射线光电子能谱仪、原子力和荧光显微镜对样品进行表征。通过循环伏安、微分脉冲伏安法及线性扫描法在酸性溶液中对蔗糖进行电化学检测。结果表明,这种新传感器对蔗糖氧化呈现良好的响应,具有宽的线性范围（R2=0.996 79）,高灵敏度（~41.737 25±0.01μAμM-1·cm-2）、低的检测限（1μmol/L）,高的稳定性及短的响应时间（9 s）。

关键词：蔗糖循环伏安微分脉冲伏安法线性扫描伏安

Regional representation of glaciers in Chandra Basin region,western Himalaya,India

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Geoscience Frontiers 2017年第4期8卷 841-850页

作者： Pratima Pandey s.Nawaz Ali AL.Ramanathan P.K.Champati ray G.Venkataraman Geosciences and Geohazards Department Indian Institute of Remote Sensing Birbal sahni Institute of Paleosciences school of Environmental science Jawaharlal Nehru University Centre of studies in Resource Engineering Indian Institute of Technology

Hamtah and Chhota shigri are two nearby,well monitored glaciers of western Himalaya,lying in the same climatic zone and driven by the same climatic *** this study,topographical characteristics of both the glacier have been explored to understand the role of topography in controlling the glacier ***,their topographical characteristics and possible response towards climatic variations have been compared with each other and also with that of the other glaciers in the basin to find out the suitability of these two glaciers to be considered as representative of the *** sensor and multi temporal remote sensing data have been used to carry out to fulfill the *** is found that being in the same climatic zone,the mean accumulation area ratio of Chhota shigri is 54%and Hamtah is 11%between 1980 and *** comparison to Hamtah,Chhota shigri glacier has a small upslope area,low compactness ratio indicating the ability of the glacier to receive direct precipitation and solar *** analysis revealed that the Chhota shigri glacier has a closer resemblance with the other glaciers in the region than Hamtah ***,the topographical settings of Chhota shigri glacier are suitable for recording and reflecting year-to-year climatic variations.

关键词： Himalaya Glacier Regional representation Topography Remote sensing

Confining Mos_(2) nanocrystals in MOF-derived carbon for high performance lithium and potassium storage

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Green Energy & Environment 2021年第1期6卷 75-82页

作者： Chen Hu Kun Ma Yanjie Hu Aiping Chen Petr saha Hao Jiang Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai200237China Centre of Polymer systems University InstituteTomas Bata University in ZlinTrida T.Bati 567876001ZlinCzech Republic

Developing an efficient synthesis protocol to simultaneously control 2D nanomaterials’size and dispersion is the pivot to optimize their electrochemical ***,we report the synthesis of uniform Mos_(2) nanocrystals well-anchored into the void space of porous carbon(donated as Mos_(2)3C hybrids)by a simple confined reaction in metal–organic framework(MOF)during carbonization *** strong confinement effect refrain Mos2 growth and aggregation,generating abundant active centers and edges,which contribute fast lithium/potassium reaction *** addition to the hybridization with the derived carbon,the Mos_(2)3C hybrids exhibit rapid Liþtransfer rate(~109 cm^(2) s 1)and greatly improved electronic ***,the Mos23C hybrids show ultrafast rate performances and satisfactory cycling stabilities as anode materials for both lithium and potassium ion *** work demonstrates a universal tactic to achieve high dispersive 2D nanomaterials with tailorable particle size.

关键词： Confined reaction Mos_(2) Nanocrystals Metal–organic framework Energy storage

On a Class of Non-local Operators in Conformal Geometry

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Chinese Annals of Mathematics,series B 2017年第1期38卷 215-234页

作者： sun Yung Alice CHANG ray A.YANG Mathematics Department Princeton UniversityFine HallWashington RoadPrinceton New Jersey 08544-1000USA

In this expository article, the authors discuss the connection between the study of non-local operators on Euclidean space to the study of fractional GJMs operators in conformal geometry. The emphasis is on the study of a class of fourth order operators and their third order boundary operators. These third order operators are generalizations of the Dirichlet-to-Neumann operator.

关键词： High order fractional GJMs operator Generalized boundary Yamabe problem sobolov trace extension

Machining of circular micro holes by electrochemical micro-machining process

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Advances in Manufacturing 2013年第4期1卷 314-319页

作者： Alok Kumar Das P. saha AlokKumarDas·Parthasaha Indian school of Mines Dhanbad Jharkhand India Indian Institute of Technology Kharagpur KharagpurWest Bengal India

Machining of micro holes with micro electro- chemical machining （micro ECM） process has been carried out with an indigenously developed set up. This paper describes relevant problems and solutions for the circular micro holes machining process on 304 stainless steel sheets with 60 μm thickness using high speed steel cylindrical tool of diameter 500 ~tm and using dilute I-I2sO4 as elec- trolyte. The taper angle variation of the machined hole is analyzed and reported for different experimental setting parameters. The minimum value of the taper angle of machined holes is achieved at the parameter setting of 0.4 mol/L H2504, 700 kHz, 600 ns and 21 V, for stainless steel sheets and Hss tool.

关键词： Micro machining - Micro ECMMicro-hole ~ Electrochemical dissolution ~short pulse voltage ~ Pulse power supply