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A bi-level optimization for a make-to-order manufacturing supply chain planning:a case in the steel industry Lanndon

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journal of management Analytics 2021年第4期8卷 598-621页

作者： Lanndon A.Ocampo Neelesh N.Vasnani Felixter Leone S.Chua Lance Brandon m.Pacio Brian j.Galli Department of Industrial Engineering Cebu Technological UniversityCebu CityPhilippines Graduate School Cebu Technological UniversityCebu CityPhilippines Department of Industrial Engineering University of San CarlosCebu CityPhilippines School of Computer Science Innovation&Management EngineeringHofstra UniversityHempsteadNew YorkUSA

This paper presents an actual case application of a newly developed gametheoretic model in analyzing a single manufacturer-many supplier,multi-period,make-to-order supply chain with fuzzy *** supply chain under consideration comprises an exclusive supplier for every component required by the manufacturer in producing its *** certain instances,some supply chains enable the manufacturer to opt for a third-party subcontractor to produce a portion of its *** assume that the supply chain faces a price and lead-time-sensitive demand,which is relevant in a make-to-order *** vertical interaction within the supply chain is played as a Stackelberg game,where the manufacturer is considered the leader and the suppliers as the *** show some important managerial insights in supply chain planning under a make-to-order condition.

关键词： make-to-order supply chain production planning Stackelberg game bi-level optimization

ON INTEGRATION AND ADAPTATION IN COmPLEX SERVICE SYSTEmS

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journal of Systems Science and Systems Engineering 2008年第4期17卷 385-415页

作者： james m.TIEN College of Engineering University of miami Coral GablesFloridaUSA

The services sector employs a large and growing proportion of workers in the industrialized nations, and it is increasingly dependent on information and communication technologies. While the interdependences, similarities and complementarities of manufacturing and services are significant, there are considerable differences between goods and services, including the shift in focus from mass production to mass customization （whereby a service is produced and delivered in response to a customer＇s stated or imputed needs）. In general, services can be considered to be knowledge-intensive agents or components which work together as providers and consumers to create or co-produce value. Like manufacturing systems, an efficient service system must be an integrated system of systems, leading to greater connectivity and interdependence. Integration must occur over the physical, temporal, organizational and functional dimensions, and must include methods concerned with the component, the management, and the system. moreover, an effective service system must also be an adaptable system, leading to greater value and responsiveness. Adaptation must occur over the dimensions of monitoring, feedback, cybernetics and learning, and must include methods concerned with space, time, and system. In sum, service systems are indeed complex, especially due to the uncertainties associated with the human-centered aspects of such systems. moreover, the system complexities can only be dealt with methods that enhance system integration and adaptation. The paper concludes with several insights, including a plea to shift the current misplaced focus on developing a science or discipline for services to further developing a systems engineering approach to services, an approach based on the integration and adaptation of a host of sciences or disciplines （e.g., physics, mathematics, statistics, psychology, sociology, etc.）. In fact, what is required is a services-related transdisciplinary - beyond a s

关键词： Services service system system components system integration system adaptation system of systems decision informatics real-time decision making

BIG DATA:UNLEASHING INFORmATION

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journal of Systems Science and Systems Engineering 2013年第2期22卷 127-151页

作者： james m.TIEN College of Engineering University of Miami

At present, it is projected that about 4 zettabytes （or 10^＊＊21 bytes） of digital data are being generated per year by everything from underground physics experiments to retail transactions to security cameras to global positioning systems. In the U. S., major research programs are being funded to deal with big data in all five sectors （i.e., services, manufacturing, construction, agriculture and mining） of the economy. Big Data is a term applied to data sets whose size is beyond the ability of available tools to undertake their acquisition, access, analytics and/or application in a reasonable amount of time. Whereas Tien （2003） forewarned about the data rich, information poor （DRIP） problems that have been pervasive since the advent of large-scale data collections or warehouses, the DRIP conundrum has been somewhat mitigated by the Big Data approach which has unleashed information in a manner that can support informed - yet, not necessarily defensible or valid - decisions or choices. Thus, by somewhat overcoming data quality issues with data quantity, data access restrictions with on-demand cloud computing, causative analysis with correlative data analytics, and model-driven with evidence-driven applications, appropriate actions can be undertaken with the obtained information. New acquisition, access, analytics and application technologies are being developed to further Big Data as it is being employed to help resolve the 14 grand challenges （identified by the National Academy of Engineering in 2008）, underpin the 10 breakthrough technologies （compiled by the massachusetts Institute of Technology in 2013） and support the Third Industrial Revolution of mass customization.

关键词： Big data data acquisition data access data analytics data application decision informatics products processes adaptive services digital manufacturing mass customization third industrial revolution

modeling of Nonlinear Elements During Lightning Overvoltage Simulations

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高电压技术 2008年第12期34卷 2595-2601页

作者： j. Bajorek m. Korzeniowski G. maslowski R. Ziemba Rzeszow University of Technology W. Pola 2 35-959 Rzeszow Poland

The paper presents some problems of lightning overvoltage modeling in transmission lines with nonlinear *** presented results were obtained mostly for fast front transients of subsequent lightning return stroke *** effectiveness of numerical algorithms of nonlinear models and possibilities of their development for such transients are *** simulations carried out by application of EmTP show that nonlinear models of back-flashover and ZnO arresters work properly,while the implemented corona model can not be used for relatively large peak values of subsequent lightning return-stroke currents.

关键词：雷电过电压仿真非线性无件模型

Slip flow and variable properties of viscoelastic fluid past a stretching surface embedded in a porous medium with heat generation

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journal of Central South University 2016年第4期23卷 991-999页

作者： Ahmed m.megahed Department of mathematics Faculty of Science Benha University (13518)

This study examines theoretically and computationally the non-Newtonian boundary layer flow and heat transfer for a viscoelastic fluid over a stretching continuous sheet embedded in a porous medium with variable fluid properties, slip velocity, and internal heat generation/absorption. The flow in boundary layer is considered to be generated solely by the stretching of the sheet adjacent to porous medium with boundary wall slip condition. Highly nonlinear momentum and thermal boundary layer equations governing the flow and heat transfer are reduced to set of nonlinear ordinary differential equations by appropriate transformation. The resulting ODEs are successfully solved numerically with the help of shooting method. Graphical results are shown for non-dimensional velocities and temperature. The effects of heat generation/absorption parameter, the porous parameter, the viscoelastic parameter, velocity slip parameter, variable thermal conductivity and the Prandtl number on the flow and temperature profiles are presented. moreover, the local skin-friction coefficient and Nusselt number are presented. Comparison of numerical results is made with the earlier published results under limiting cases.

关键词： viscoelastic fluid variable fluid properties slip velocity

Analysis of culturable and unculturable microbial community in bensulfuron-methyl contaminated paddy soils

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journal of Environmental Sciences 2008年第12期20卷 1494-1500页

作者： m.L.Umashankara Department of Sericulture College of YuvarajasMysore University

To investigate the influence of bensulfuron-methyl(BSm)on culturable microbial quantities and unculturable microbial community structures,conventional and molecular biological methods were employed in five BSm treated soils with three replications,respectively. The results obtained with traditional culture-dependent methods showed that a low-level of BSm had slight and transient effects on culturable microorganisms;nevertheless,high concentration of BSm resulted in a dramatic decrease in bacterial colony fo...

关键词： bensulfuron-methyl(BSm) microbial quantities community structures DGGE

THE SPUTNIK OF SERVGOODS： AUTONOmOUS VEHICLES

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journal of Systems Science and Systems Engineering 2017年第2期26卷 133-162页

作者： james m. Tien College of Engineering University of Miami Coral Gables Florida 33146 USA

In an earlier paper （Tien 2015）, the author defmed the concept of a servgood, which can be thought of as a physical good or product enveloped by a services-oriented layer that makes the good smarter or more adaptable and customizable for a particular use. Adding another layer of physical sensors could then enhance its smartness and intelligence, especially if it were to be connected with each other or with other servgoods through the Internet of Things. Such sensed servgoods are becoming the products of the future. Indeed, autonomous vehicles can be considered the exemplar servgoods of the future; it is about decision informatics and embraces the advanced technologies of sensing （i.e., Big Data）, processing （i.e., real-time analytics）, reacting （i.e., real-time decision-making）, and learning （i.e., deep learning）. Since autonomous vehicles constitute a huge quality-of-life disruption, it is also critical to consider its policy impact on privacy and security, regulations and standards, and liability and insurance. Finally, just as the Soviet Union inaugurated the space age on October 4, 1957, with the launch of Sputnik, the first man-made object to orbit the Earth, the U. S. has inaugurated an age of automata or autonomous vehicles that can be considered to be the U. S. Sputnik of servgoods, with the full support of the U. S. government, the U. S. auto industry, the U. S. electronic industry, and the U.S. higher educational enterprise.

关键词： Autonomous vehicles goods services servgoods sensors Internet of Things decisioninformatics Big Data real-time analytics cloud computing deep learning privacy security regulations,standards liability insurance Sputnik

Surface plasmon oscillations in a semi-bounded semiconductor plasma

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Plasma Science and Technology 2018年第2期20卷 76-81页

作者： m SHAHmANSOURI A P mISRA Department of Physics Faculty of ScienceArak University Department of mathematics Siksha BhavanaVisva-Bharati University

We study the dispersion properties of surface plasmon（SP） oscillations in a semi-bounded semiconductor plasma with the effects of the Coulomb exchange（CE） force associated with the spin polarization of electrons and holes as well as the effects of the Fermi degenerate pressure and the quantum Bohm *** from a quantum hydrodynamic model coupled to the Poisson equation,we derive the general dispersion relation for surface plasma *** results in this context are *** dispersion properties of the surface waves are analyzed in some particular cases of interest and the relative influence of the quantum forces on these waves are also studied for a nano-sized Ga As semiconductor *** is found that the CE effects significantly modify the behaviors of the SP *** present results are applicable to understand the propagation characteristics of surface waves in solid density plasmas.

关键词： surface plasmon oscillations semiconductor plasma semi-bounded plasma

Overview of the CHILL-ICE 2021 Science Experiments and Research Campaign

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Space(Science & Technology) 2022年第1期2022卷 27-35页

作者： David j.K.Smith Charlotte R.Pouwels marc Heemskerk Benedetta m.Cattani Esther Konijnenberg Robert Heemskerk Sebasthian Ogalde ICEE Space Netherlands Euromoonmars An Initiative of ILEWG(International Lunar Exploration Working GroupThe Netherlands)Netherlands Vrije Universiteit Amsterdam Netherlands Lunar Zebro Delft University of TechnologyNetherlands Heemskerk Innovative Technology Netherlands

The main objective of the CHILL-ICE(Construction of a Habitat Inside a Lunar-analogue Lava tube—Iceland;a campaign by ICEE Space and Euromoonmars)prototype mission was to deploy an inflatable habitat and its systems inside a lunar analogue lava *** took place during an 8-hour extra vehicular activity(EVA)with three analogue astronauts as part of a threeday ***-ICE 2021 was carried out in july/August 2021 and consisted of two missions and was accomplished through successful collaboration of nonprofit research organizations,agencies,companies,and universities across 16 *** pilot campaign successfully reached its main objective:the testing of emergency equipment designed to help astronauts survive when first arriving to a new celestial body and to perform experiments similar to those that would be carried out *** article is a review of the scientific research experiments carried out during and after the mission:SpotNet,an artificial intelligence(AI)astronaut detection vision system;training for studies of the geological surroundings examined during EVAs;astronaut vigilance experiments carried out before,during,and after the mission;and Lunar Zebro,a legged rover intended to assist the crew in traversing and exploring harsh terrain.

关键词： ICE companies planet