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Visible light communications: 3.75 Mbits/s data rate with a 160 kHz bandwidth organic photodetector and artificial neural network equalization [Invited]

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Photonics Research 2013年第2期1卷 65-68页

作者： Zabih Ghassemlooy Paul Anthony Haigh Francesco Arca Sandro Francesco Tedde Oliver Hayden Ioannis Papakonstantinou sujan Rajbhandari Optical Communications Research Group Northumbria UniversityNE18STUK Siemens AG Corporate TechnologyErlangen CT T DE HW3Germany Department of Electronic&Electrical Engineering University College LondonWC1E 7JEUK Department of Engineering Science University of OxfordOX13PJUK

This paper presents an experimental demonstration of a visible light communications link with an light emitting diode and a low-bandwidth organic photodetector as transmitter and receiver,respectively,that achieves sub 4 Mbits∕s *** artificial neural network(ANN)equalizer is required in order to achieve such high data rates because of the influence of intersymbol *** digital modulation formats tested in this paper are nonreturn-to-zero on–off keying(OOK),and fourth-order pulse position modulation(4-PPM).Without equalization,data rates of 200 and 300 kbits∕s can be achieved for 4-PPM and OOK,*** ANN equalization,data rates of 2.8 and 3.75 Mbits∕s can be achieved for the first time for OOK and 4-PPM,respectively.

关键词： light visible symbol

Evaluation of anxiolytic and hypoglycemic activity of methanolic extract of Ixora cuneifolia in an animal model

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Journal of Coastal Life Medicine 2017年第10期5卷 451-454页

作者： AbdullahAl Mahmud sujan Banik Sayema Arefin Mohammed Shamim Hasan Robel Chandra Singha Department of Pharmacy Noakhali Science and Technology UniversityNoakhali-3814Bangladesh

Objective: To investigate anxiolytic and hypoglycemic activity of Ixora cuneifolia (Family:Rubiaceae) in an experimental animal model. Methods: Anxiolytic test was performed by elevated plus maze (EPM) and hole-board method. Hypoglycemic activity was measured in glucose-loaded Swiss albino mice by glucose tolerance test. Results: The methanol extract of Ixora cuneifolia exhibited dose-dependent and statistically significant (P < 0.05) anxiolytic activity at doses of 200 and 400 mg/kg. Reduction of glucose level was observed with the highest dose 400 mg/kg of the extract in glucose tolerance test. Conclusions: The better anxiolytic and hypoglycemic activities in the present study could be due to the presence of different chemical constituents like alkaloids, flavonoids, saponin, phenols and tannins in this methanolic extract.

关键词： Ixora cuneifolia Anxiolytic EPM Hole-board test Hypoglycemic

Susceptibility of microorganism to selected medicinal plants in Bangladesh

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Asian Pacific Journal of Tropical Biomedicine 2014年第11期4卷 911-917页

作者： S.M.Masud Rana Md.Mustahsan Billah Mohammad Salim Hossain A.K.M.Saifuddin S.K.M.Azizul Islam sujan Banik Zannatul Nairn Golam Sarwar Raju Department of Pharmacy Noakhali Science and Technology UniversitySonapurNoakhali-3814Bangladesh Department of Physiology Biochemistry and PharmacologyChittagong Veterinary and Animal Sciences UniversityChittagongBangladesh Department of Pharmacy Atish Dipankar University of Science and TechnologyBananiDhakaBangladesh

Objective:To analyze in-vitro antimicrobial activities of some ethno-pharmacologically significant medicinal plants(methanol extract) against the pathogenic microorganisms(Escherichia coli,Salmonella spp..Bacillus *** *** niger and Candida albicans).Methods:The disc diffusion method was applied for antibacterial test and the poisoned food technique was applied for antifungal ***:The methanol extract of Terminalia chebula(bark),Fhyllanthus acidus(fruits).Sarcochlamys pulcherrima(leaves) and Abelmoschus esculcntus(fruits) had significant in vitro antibacterial activity angainst the entire test samples in comparison to standard drug *** of the plant extracts showed low activity against Gram negative bacteria while potential activity against Gram positive *** antifungal activities of methanol extracts of these plants and standard drug griseofulvin were determined against two pathogenicfungi,and Polygonum Iapathifolium(leaves) and Cinnamomum tamala(leaves) showed maximum activity,while Erioglossum rubiginosum(leaves) showed no antifungal ***:Further chemical and pharmacological investigations are required to identify and isolate chemical constituents responsible for these potential bioactivities and thus to determine their full spectrum of efficacy.

关键词： Susceptibility Zone of inhibition Percentage of inhibition Antibacterial activity Antifungal activity

Common biases in client involved decision-making in the AEC industry

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Frontiers of Engineering Management 2019年第2期6卷 221-238页

作者： Sujesh F.sujan Arto KIVINIEMI Steve W. JONES Jacqueline M. WHEATHCROFT Eilif HJELSETH School of Engineering University of Liverpool Liverpool L69 3BX UK School of Architecture University of Liverpool Liverpool L69 3BX UK School of Psychological Sciences University of Liverpool Liverpool L69 3BX UK Department of Civil and Environmental Engineering Norwegian University of Science and Technology NO-7491 Trondheim Norway

Understanding of the constitution of client involved decisions is important for future improvements of the processes. Significant decisions in construction projects are reliant on heuristic processes where assumptions are developed from past experience. The paper presents a methodology to collect empirical data in an unstructured manner utilizing participant intuition and experience regarding project level collaboration, a term easily understood by practitioners. Empirical data collected from 6 focus group discussions in Norway and 18 individual interviews in Finland is associated with biases in decision making aimed at bridging the gap of understanding and literature's insufficient coverage. An analytic framework was developed to suit the diverse emergence of concepts to allow application of psychological principles in a structured manner to empirical data. The paper contributes by identifying types of cognitive and motivational biases in client involved decisions. The biases are found to be alleviated by one another depending on the particular application of the decision. Findings suggest that normative beliefs exist developed from past experience and habitual thinking. A number of emerged biases in this domain are alleviated from normative beliefs which are discussed in this paper.

关键词： collaboration construction industry social science decision-making client cognitive bias motivational bias holistic analysis human factor

Mechanical behavior and semiempirical force model of aerospace aluminum alloy milling using nano biological lubricant

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Frontiers of Mechanical Engineering 2023年第1期18卷 55-69页

作者： Zhenjing DUAN Changhe LI Yanbin ZHANG Min YANG Teng GAO Xin LIU Runze LI Zafar SAID sujan DEBNATH Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical Engineering Dalian University of TechnologyDalian 116024China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089-1111USA College of Engineering University of SharjahSharjah 27272United Arab Emirates Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India

Aerospace aluminum alloy is the most used structural material for rockets,aircraft,spacecraft,and space *** deterioration of surface integrity of dry machining and the insufficient heat transfer capacity of minimal quantity lubrication have become the bottleneck of lubrication and heat dissipation of aerospace aluminum ***,the excellent thermal conductivity and tribological properties of nanofluids are expected to fill this *** traditional milling force models are mainly based on empirical models and finite element simulations,which are insufficient to guide industrial *** this study,the milling force of the integral end milling cutter is deduced by force analysis of the milling cutter element and numerical *** instantaneous milling force model of the integral end milling cutter is established under the condition of dry and nanofluid minimal quantity lubrication(NMQL)based on the dual mechanism of the shear effect on the rake face of the milling cutter and the plow cutting effect on the flank surface.A single factor experiment is designed to introduce NMQL and the milling feed factor into the instantaneous milling force *** average absolute errors in the prediction of milling forces for the NMQL are 13.3%,2.3%,and 7.6%in the x-,y-,and z-direction,*** with the milling forces obtained by dry milling,those by NMQL decrease by 21.4%,17.7%,and 18.5%in the x-,y-,and z-direction,respectively.

关键词： milling force nanofluid minimum quantity lubrication aerospace aluminum alloy nano biological lubricant

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高超声速飞行器热载荷计算及影响因素分析

北京航空航天大学学报 2009年第3期35卷 308-312页

作者：张利珍王晓明董素君王浚北京航空航天大学航空科学与工程学院北京100191 成都飞机设计研究所成都610041

对吸热式热防护系统和液氮为冷源的高超声速飞行器热控系统,分别采用辐射热平衡法和双层集总参数法,建立了隔热层和舱内温度场的热力学模型,实现了气动加热、隔热层导热及舱内温度场等各传热环节的解耦.在此基础上,按照X-34验证机的飞... 详细信息

对吸热式热防护系统和液氮为冷源的高超声速飞行器热控系统,分别采用辐射热平衡法和双层集总参数法,建立了隔热层和舱内温度场的热力学模型,实现了气动加热、隔热层导热及舱内温度场等各传热环节的解耦.在此基础上,按照X-34验证机的飞行剖面对高超声速飞行器电子设备舱热载荷进行了计算,并分析了隔热层厚度、舱内冷却气体流速及液氮量对舱内温度和电子设备温度的影响.结果表明,该方法对热传递过程各环节响应特性能够较准确的分析,在工程方案初步设计阶段具有重要的应用价值.

关键词：高超声速飞行器热控系统热防护系统热载荷

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《无机材料学报》在改革中谋求更好的发展

中国科技期刊研究 2009年第4期20卷 672-674页

作者：陈素军徐文娟 <无机材料学报>编辑部上海市定西路1295号200050 中国科学院上海硅酸盐研究所

回顾了《无机材料学报》成为在国内外材料科学领域有一定影响的SCI收录期刊的发展历程;对《无机材料学报》近几年发展所面临的机遇和挑战进行了分析,总结了办刊经验和体会;并阐述了办刊中的一些具体做法,提出了该刊进一步发展应该关注... 详细信息

回顾了《无机材料学报》成为在国内外材料科学领域有一定影响的SCI收录期刊的发展历程;对《无机材料学报》近几年发展所面临的机遇和挑战进行了分析,总结了办刊经验和体会;并阐述了办刊中的一些具体做法,提出了该刊进一步发展应该关注的问题。

关键词：《无机材料学报》办刊实践 SCI期刊改革发展

Design and Optimization of Actuator for HT-25 Multifunctional Loader

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World Journal of Engineering and Technology 2023年第4期11卷 874-892页

作者： Md. Al Imran Tapu Joy Howlader Md. Shahriar sujan Md. Jahangir Alam Md. Mehedi Hassan College of Harbor Coastal & Offshore Engineering Hohai University Nanjing China Department of Computer Science and Technology College of Computer and Information Hohai University Nanjing China College of Civil and Transportation Engineering Hohai University Nanjing China Department of Information Communication Engineering College of Internet of Things Hohai University Nanjing China

To break down the development interaction of the working gadget of the multi-practical wheel loader and to compute the heap of each part, the Denavit-Hartenberg strategy was applied to build up the kinematics of the instrument model. Also, all the while, set up the elements model of dynamic framework. A multi-body element programming MSC, ADAMS and its active module were applied to assemble component power through a pressure framework reenactment model. An entirety working cycle interaction of the functioning gadget of the wheel loader was mimicked, and the investigation results thoroughly show the development interaction of the functional device and the stacked state of each part, and check the mechanical properties of the working gadget and dynamic execution water-driven framework effectively.

关键词： Multifunctional Loader Hydraulic Circuit CAD Power System Hydraulic Actuator and Pump

Comparative assessment of force,temperature,and wheel wear in sustainable grinding aerospace alloy using biolubricant

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Frontiers of Mechanical Engineering 2023年第1期18卷 1-33页

作者： Xin CUI Changhe LI Yanbin ZHANG Wenfeng DING Qinglong AN Bo LIU Hao Nan LI Zafar SAID Shubham SHARMA Runze LI sujan DEBNATH School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China State Key Laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong KongChina College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Sichuan Future Aerospace Industry LLC. Shifang 618400China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China College of Engineering University of SharjahSharjah 27272United Arab Emirates Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089USA Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia

The substitution of biolubricant for mineral cutting fluids in aerospace material grinding is an inevitable development direction,under the requirements of the worldwide carbon emission ***,serious tool wear and workpiece damage in difficult-to-machine material grinding challenges the availability of using biolubricants via minimum quantity *** primary cause for this condition is the unknown and complex influencing mechanisms of the biolubricant physicochemical properties on *** this review,a comparative assessment of grindability is performed using titanium alloy,nickel-based alloy,and high-strength ***,this work considers the physicochemical properties as the main factors,and the antifriction and heat dissipation behaviours of biolubricant in a high temperature and pressure interface are comprehensively ***,the comparative assessment of force,temperature,wheel wear and workpiece surface for titanium alloy,nickel-based alloy,and high-strength steel confirms that biolubricant is a potential replacement of traditional cutting fluids because of its improved lubrication and cooling ***-viscosity biolubricant and nano-enhancers with high thermal conductivity are recommended for titanium alloy to solve the burn puzzle of the *** with high viscosity and high fatty acid saturation characteristics should be used to overcome the bottleneck of wheel wear and nickel-based alloy surface *** nano-enhancers with high hardness and spherical characteristics are better ***,a different option is available for high-strength steel grinding,which needs low-viscosity biolubricant to address the debris breaking difficulty and wheel ***,the current challenges and potential methods are proposed to promote the application of biolubricant.

关键词： grinding aerospace difficult-to-machine material biolubricant physicochemical property grindability