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2011 2nd IEEE International Conference on Emergency Management and Management Sciences(ICEMMS 2011)

作者： Wu Yingfeng School of management~() Postdoctoral Workstation~() Pinggao Group Co.,Ltd.~() Xi’an,China

This paper proposes a practical problem of optimization of production process based on time constraints in Pinggao Group Co.,*** to custom’s demand,it needs to complete the productive task of designated work pieces in a strict time *** practical problem is originated form the produce *** objective is to minimize the total cost of production process,satisfying the time *** this paper, the practical problem is formulated as an integer programming *** a case study,a software package(Lingo 9.0) is applied to solve the optimization problem of the production process for slave cylinder in 2 factory of Pinggao Group Co.,Ltd.

关键词： Operations research Optimization Problem of Production Process time constraints integer programming model

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Process engineering in circular economy

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Particuology 2013年第2期11卷 119-133页

作者： Lothar Reh Institute of Process Engineering Swiss Federal Institute of Technology(ETH)

Driven by increasing global population and by growing demand for individual wealth, the consumption of energy and raw materials as well as the steadily growing CO2 concentration in atmosphere pose great challenges to process engineering. This complex multi-scale discipline deals with the transformation of mass by energy to manifold products in different industrial fields under economical and ecological sus- tainable conditions. In growing circular economy, process engineering increasingly plays an important role in recovering valuable components from very diffuse material flows leaving the user stocks following widely variable time periods of use. As well it is engaged in thermal recovery of energy therefrom and in environmentally safe disposal of residual solid wastes whose recovery economically is not feasible. An efficient recovery of materials and energy following the laws of entropy is a must. A complex network of mass, energy, transportation and information flows has to be regarded with growing traded quantities of used goods even on global level. Important constraints in time, however, exist for a necessary realization of innovative new processes and communal mobility and industrial infrastructure on medium and large scale. Based on reasonable long term and highly reliable statistics from industrial organizations repre- senting steel and paper industry, some limits and trends of possible developments in processing of those industries with long recycling experience will be discussed.

关键词： Perspective Process engineering Circular economy Stocks and flows Energy and material efficiency Multi-scale systems Preparation Entropy time constraints Steel industry Paper industry

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Economical Requirements Elicitation Techniques During COVID-19: A Systematic Literature Review

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Computers, Materials & Continua 2021年第5期67卷 2665-2680页

作者： Tauqeer ul Amin Basit Shahzad Fazal-e-Amin Muhammad Shoaib Department of Software Engineering National University of Modern LanguagesIslamabadPakistan Department of Software Engineering College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia

Requirements elicitation is a fundamental phase of software development in which an analyst discovers the needs of different stakeholders and transforms them into *** phase is cost-and time-intensive,and a project may fail if there are excessive costs and schedule ***-19 has affected the software industry by reducing interactions between developers and *** a lack of interaction is a key reason for the failure of software *** can also fail when customers do not know precisely what they ***,selecting the unsuitable elicitation technique can also cause project *** present study,therefore,aimed to identify which requirements elicitation technique is the most cost-effective for large-scale projects when time to market is a critical issue or when the customer is not *** that end,we conducted a systematic literature review on requirements elicitation *** primary studies identified introspection as the best technique,followed by survey and *** finding suggests that introspection should be the first choice of elicitation technique,especially when the customer is not available or the project has strict time and cost ***,introspection should also be used as the starting point in the elicitation process of a large-scale project,and all known requirements should be elicited using this technique.

关键词： COVID-19 software engineering requirements engineering requirements elicitation introspection project failure SLR on elicitation techniques large-scale projects economical elicitation techniques costeffective time constraints

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Vehicle flow formulation for two-echelon time-constrained vehicle routing problem

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Journal of Management Science and Engineering 2019年第2期4卷 75-90页

作者： Hongqi Li Ming Bai Yibin Zhao Changzhi Dai School of Transportation Science and Engineering Beihang UniversityBeijing100191China

Two-echelon routing problems,including variants such as the two-echelon vehicle routing problem(2E-VRP)and the two-echelon location routing problem(2E-LRP),involve assignment and location ***,the two-echelon time-constrained vehicle routing problem(2E-TVRP)that caters to from-linehaul-to-delivery practices does not involve assignment *** routing problem variant for networks with two eche-lons has not yet attracted enough research *** or long-distance services suffer from the lack of the assignment decisions between satellites and ***,the 2E-TVRP,rather than using assignment decisions,adopts time constraints to decide the routes on each of the two interacting echelons:large-capacity vehicles trans-port cargoes among satellites on the first echelon,and small-capacity vehicles deliver cargoes from satellites to customers on the second *** study introduces a mixed integer linear programming model for the 2E-TVRP and proposes a heuristic algorithm that incorporates the savings algorithm followed by a variable neighborhood search *** examples are used to test the mathematical formulation and the heuristic and a case study is used to demonstrate that the heuristic can effectively solve realistic-size instances of the 2E-TVRP.

关键词： Vehicle routing Two-echelon time constraints Mixed integer linear programming Variable neighborhood search

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Intraspecific differentiation of primary moult parameters in the Grey Plover Pluvialis squatarola

Intraspecific differentiation of primary moult parameters in...

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23rd International Ornithological Congress

作者： Lorenzo Serra Istituto Nazionale per la Fauna Selvatica 40064 Ozzano Emilia BO Italy and Avian Demography Unit University of Cape Town Rondebosch 7700 South Africa

＜正＞ The Grey Plover Pluvialis squatarola is a circumpolar wader with a cosmopolitan winter distribution, performing long migrations between breeding and wintering areas. Data on adult Grey Plovers caught for ringing at seven wintering areas （Britain, Italy, Kenya, South Africa, India, NW Australia and SE Australia） were analysed in order to schedule primary moult into the annual cycle and to identify （a） the way moult is

关键词： primary moult feather quality adaptive responsiveness feather growth rate time constraints

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