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Necessary and Sufficient Optimality Conditions for Relaxed and Strict Control of Forward-Backward Doubly SDEs with Jumps Under Full and Partial Information

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Journal of Systems Science & Complexity 2020年第6期33卷 1804-1846页

作者： AL-HUSSEIN AbdulRahman gherbal boulakhras Department of Mathematics College of ScienceQassim UniversityBuraydah 51452Saudi Arabia Laboratory of Mathematical Analysis Probability and OptimizationUniversity of Mohamed KhiderBiskrua07000Algeria

This paper derives necessary and sufficient conditions of optimality in the form of a stochastic maximum principle for relaxed and strict optimal control problems with *** problems are governed by multi-dimensional forward-backward doubly stochastic differential equations(FBDSDEs)with Poisson jumps and has firstly relaxed controls,which are measure-valued processes,and secondly,as an application,the authors allow them to have strict *** FBDSDEs with jumps are fully-coupled,the forward and backward equations work in different Euclidean spaces in general,the backward equation is Markovian,and the control problems are considered under full information or partial information in terms ofσ-algebras that provide such *** formulation of these equations as well as performance functionals are given in abstract forms to allow the possibility to cover most of the applications available in the ***,coefficients of such equations are allowed to depend on control variables.

关键词： Adjoint equations forward-backward doubly stochastic differential equations maximum principle necessary conditions Poisson process relaxed control strict control sufficient conditions

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Using the Balanced Scorecard as a Strategic Management System in the Libyan Construction Industry

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Management Studies 2018年第1期6卷 1-19页

作者： Abdussalam Shibani Nawal gherbal Coventry University Coventry UK

Libya is a developing country that has a growing construction industry, however, the management of construction projects frequently experiences challenges with time and cost restraints and this affects the overall performance of the project as well as the performance of the project managers. The main aim of this paper is to apply BSC in the Libyan construction industry and evaluate the factors that impact project manager performance and their ability to complete and deliver projects successfully in Libya. This study will ascertain the role of project managers, the challenges that project managers in Libya frequently encounter the cause of time and cost overruns within construction projects and the main factors for successful construction projects. This research adopted both quantitative and qualitative research methods. The findings are based upon 300 structured questionnaires distributed to general, project managers working on construction sectors in Libya （Tripoli）. Completed questionnaires received were 183. This is a response rate of 61%. A statistical analysis was used to confirm and address the issues of reliability and validity of the questionnaire survey as a measuring instrument. In addition structured interviews with qualified project managers were used to confirm that the data collected were truly reflective. Upon the data analysis from the questionnaire survey and structured interview the project manager is the most important factor affecting the success of the project in construction industries Libya, furthermore project manager skills are important components that influence the performance of project manager.

关键词： BSC Libya questionnaires survey construction industry qualitative research

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