The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, an assembly cell formation problem is addressed, which has been reported as a new technical innovation in the industry. First, a mathematical model is proposed to describe the assembly cell formation problem. Some decisions are made about the assembly cell formation problem, such as (1) how many cells should be formatted, (2) how many workers should be assigned in each cell, and (3)...
We present an investigation of specialization when considering the execution of collaborative tasks by a robot swarm. Specifically, we consider the stick-pulling problem first proposed by Martinoli et al., and develop a macroscopic analytical model for the swarm executing a set of tasks that require the collaboration of two robots. We show, for constant external conditions, maximum productivity can...
The performance impact of information technology (IT) investment is an important research topic that needs to take into consideration the role of key contextual factors. This study discussed and empirically tested the moderating effects of environmental dynamism and branch strategy on the impact of IT investment and other effective variables (number of employee and fixed asset) on branches performance...
Security management is about calculated risk and requires continuous evaluation to ensure cost, time and resource effectiveness. Parts of which is to make future-oriented, cost-benefit investments in security. Security investments must adhere to healthy business principles where both security and financial aspects play an important role. Information on the current and potential risk level is essential...
Although it is an old method, the use of Greenpsilas function to solve unsteady flow in reservoir engineering is not widely practiced. The reasons are that it is difficult to find the appropriate Greenpsilas function and evaluating performance of perforation completion of horizontal well is more sophisticated than conventional completion. In this study, the flow in formation after being perforated...
This article has estimated the stochastic frontier production function of grain farming through building a parallel data model. It has divided the growth source of grain output into factor input, technical progress and technical efficiency. The research indicates that the growth of the grain output in Hubei during the period from 1980-2005 mainly derived from agricultural technical, following was...
In order to measure a trend of inefficient DMUs, this research has enhanced the hierarchical DEA model to time dependent situation applying discriminant analysis as a new evaluation index. The hierarchical DEA model classifies inefficient DMUs into the frontiers that are related to the order. A new index for time dependent situation by discriminant analysis is to measure the time trend in t+1 period...
Using cross-section data relating to a sample of 12 Asian developing countries with relative higher FDI inflows from 1980-2005, we show that FDI by itself contributes to the economic growth. But the regression result of the inward FDI flows as a percentage of Gross Fixed Capital Formation, that is, the variable SHARE is not so robust related to the economic growth. Other factors also work in the economic...
Knowledge management (KM) plays the most important role in knowledge-intensive corporation. Knowledge sharing is a critical step for successful KM. It is a difficult problem for corporation to urge staff sharing knowledge which can increase the payoff in firm. In this paper, we establish incentive model in order to promote sharing knowledge. Through analyzing the model, many valuable conclusions are...
It is necessary to analyze the anti-terrorism performance of Taiwanpsilas security system after September 11, 2001 attacks. We use three stage data envelopment analysis model that Fried et al. (2002) developed, getting intelligence performance of the Investigation Bureau of the Ministry of Justice, to discuss the ability of anti-terrorism in Taiwanpsilas national security system. Putting 10 outputs,...
An organizational level test strategy needs to incorporate metrics to make the testing activities visible and available to process improvements. The majority of testing measurements that are done are based on faults found in the test execution phase. In contrast, this paper investigates metrics to support software test planning and test design processes. We have assembled metrics in these two process...
TAT cost standard is defined and proposed by a relation between lot size, TAT and wafer cost in this paper. How to treat large variations of waiting time in a site data is excogitated. Proposed TAT costs equations and corrections can be used in a short TAT rate charge, TAT management etc. of many lines and products.
On-line optimization of bioprocesses is a difficult task due to lack of suitable on-line sensors, absence of accurate mathematical models, and complex non-linear dynamic behaviour. In the present investigation, an algorithm was developed for on-line state estimation and optimization of a continuous bioreactor (ethanol fennentation), using state equations. A number of case studies are presented which...
Optimization and control of an industrial microalgae fermentation has been studied in this work. A mathematical model has been developed based on the data collected from pilot plant test runs at different operating conditions at Coors BioTech Company. Several optimization techniques, such as, Pontryagin's Maximum Principle, Feedback Sub-Optimal Policy and Direct Search Method, were used for maximizing...
In order to improve the productivity of a fermentation process, it is necessary to obtain reliable on-line data for all the important variables involved. Some of these are obtained by direct measurement and others are estimated. In the estimated variables, the model used to predict its behavior is usually known with a certain degree of precision. However, the parameters of the model may vary with...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.