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Cloud computing is most widely increasing platform for task execution. On the other hands, virtual machine configuration plays as a critical role in the cloud computing performance. It is responsible to select the best suitable configuration for task execution by taking into consideration some static and dynamic factors of tasks. The aim of this paper is to study the effective of homogeneity and heterogeneity...
The aim of survey design is to obtain optimum precision at minimum cost. Stratification is one of the commonly used methods of survey design. When using stratification one of the main problems to consider is the determination of optimum strata boundaries. This paper will discuss how to determine the optimum strata boundaries when the measurement cost per units varies across the strata. The problem...
Along with our country market economy system perfect cost investment system, price system also constantly optimize the project construction cost, construction project becomes more and more important. This paper from the project cost management objectives, significance and key control, research the development condition.
A collaborative optimization model is proposed to integrate the energy performance to the optimization of sintering burden. Firstly, the collaborative optimization problem in sintering burden is described, and then the association model between sinter raw material proportion, production parameter and energy consumption, drum index is provided using data-based methods. Furthermore, objective functions...
It has become the norm in many projects to view the traditional trade-offs as classic problems to ‘solve’. This approach often suppresses the creative exploitation of paradox within the triple constraint. The principles and practices of Polarity ManagementTM introduce a refreshed perspective by supporting the ‘either/or’ problem solving approach with the ‘both/and’ rationale, which allows the triple...
Projects over the years failed to be completed within the specified triple constraint, hence lack of development in skills and infrastructure. The objective of the research is to assess the triple constraint and determine sources of failures in order to increase the success rate of construction projects in South Africa and to give priority on the triple constraint. Both the contextual and fieldwork...
We consider a two-period production and pricing model under a coupon recycling environment, in which a monopolistic manufacturer is able to produce and sell new, remanufactured and upgraded products simultaneously in the market. To attract consumers to return used products and promote the sale of upgraded products, the manufacturer offers coupons in the recycling process. We focus on the competition...
Customer service level and cost are two elements that create corporation competitive advantage in auto industry. A model is established proving that current logistics mode-same replenishment policy to all parts have to sacrifice one when achieving another. So a distinguished replenishment policy to hub is discussed. The mode is composed of three steps. Parts classification: according to holding risk...
Silicon Carbide (SiC) is among the most promising semiconductor for high-voltage and high-temperature power electronics switching applications. A careful analysis of the current state-of-the-art commercial 4H-SiC power Schottky Barrier Diodes (SBDs) shows that these devices are operated well below their true avalanche breakdown potential. It is found that the breakdown voltage ratings of these devices...
The dv/dt switching limitations of power semiconductor devices in a boost DC-DC power converter are evaluated using circuit simulations and accurate circuit simulation models. State-of-the-art commercial silicon CoolMOS devices, commercial Silicon Carbide (SiC) power Schottky Barrier Diodes (SBD??s), and emerging Gallium Nitride (GaN) power transistors are considered. It is shown that although SiC...
Projects are generally undertaken because they are part of the plans to meet business needs and charter organizations to new levels of performance. Projects are however constrained by conflicting demands and competing priorities within the project environment. Neglecting to manage these constraints accurately and effectively may be sufficient to condemn a project even if all other project management...
All cloud services require the fundamental layer known as Infrastructure as a service (IaaS). Clouds have the benefit of being cost effective, while improving productivity. This paper is focused on a proposed conceptual model for deploying Cloud IaaS in Higher Educational Institutions in Africa with Nigeria as a Case Study. As an IT professional working in the educational sector in this region the...
Because of High-Pressure Swing Spraying Grouting Engineering Test needs more parameters to define, and the tests of construction unit are simple and bold, the engineering cost is very high. Through analyzing the internal relations between different parameters and comparing their importance by the introduction of the hydraulic formulas based on the South-to-North Water Transfer Project, this paper...
Based on the theory of fuzzy multi-object group decision and fuzzy technique for order preference by similarity to ideal solution (FTOPSIS), fuzzy optimization model of time-cost-quality for Dayawan water diversion engineering project is formed. Then, applying fuzzy multi-model network planning techniques and self-adaptive genetic algorithms, the most satisfied decision alternatives can be obtained.
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