DSpace collection: 第27卷第3期
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Standby System with Imperfect Coverage and Repairable Service Station
http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109396
title: Standby System with Imperfect Coverage and Repairable Service Station abstract: This paper analyzes the reliability characteristics of a system with imperfect coverage in which a repairable service station is considered. Failure times of primary and standby units are assumed to follow exponential distributions. With a coverage probability c, a failed unit is immediately detected and replaced by a standby if one is available. If the
failed unit is not detected, the system enters an unsafe failure state and has to be refreshed by a reboot action. When the service station breaks down, it needs repair at a repair device. We present the expression for reliability function RY (t) and mean time to system failure MT T F. Several cases are analyzed to study the effects of various parameters on the
system reliability RY (t) and MT T F. We also perform the sensitivity analysis of RY (t) and MT T F with respect to system parameters. Finally, we present an application example to demonstrate the applicability of investigated model.
<br>Mon, 13 Feb 2017 08:19:28 GMTTwo-Period Pricing Model for Walk-in Potential Consumers with Normal Distribution of the Price of Their Willing to Buy
http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109395
title: Two-Period Pricing Model for Walk-in Potential Consumers with Normal Distribution of the Price of Their Willing to Buy abstract: The optimal model was mainly constructed for the products, such as real estates, amusement park, or major furniture which themselves cannot be moved or worn to reveal to other consumers in public, to explain their optimal promotional pricing strategy. The study adopted the dual sources of the diffusion power, the number of walk-in potential consumers and the price level of the product, in the extended Bass Diffusion Model. Given periods of [0, T ) and [T, T¯), T < T¯, and T¯ maybe ∞ when a firm attempts to decide price P0 within [0, T ) and price PT within [T, T¯), respectively, to achieve the goal of maximizing discounted profit in the interval [0, T¯), the characteristics of its optimal solution (P ∗ 0 , P∗ T ) at each period were rigorously derived and profoundly discussed. This two-period model pricing could be extended to an infinite multiple-period optimal pricing model to become the issue of price control. The study would further conclude that, after a new product is initialized, its price should decline with time to take advantage of it with exhausting the consumer surplus of
consumers.
<br>Mon, 13 Feb 2017 08:14:51 GMTReliability Evaluation of a Multicommodity Capacitated-Flow Network in Terms of Minimal Pathsets
http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109394
title: Reliability Evaluation of a Multicommodity Capacitated-Flow Network in Terms of Minimal Pathsets abstract: Many real-world systems such as transportation systems, logistics/distribution systems, and manufacturing systems can be regarded as multicommodity flow networks whose arcs
have independent, finite and multi-valued random capacities. Such a flow network is a
multistate system with multistate components and its reliability for level d = (d1, d2, . . . , dk), i.e., the probability that k different types of commodity can be transmitted from the source node to the sink node in the way that the demand level d = (d1, d2, . . . , dk) is satisfied, can be computed in terms of minimal path vectors to level d (named d-MPs here). The main objective of this paper is to present a simple algorithm to generate all d-MPs of such a flow network for each level d = (d1, d2, . . . , dk) in terms of minimal pathsets. Three examples are given to illustrate how all d-MPs are generated by our algorithm and then the reliability of one example is computed.
<br>Mon, 13 Feb 2017 08:09:46 GMTA New Approach in Multiple Attribute Decision Making using R-norm entropy and Hamming Distance Measure
http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109393
title: A New Approach in Multiple Attribute Decision Making using R-norm entropy and Hamming Distance Measure abstract: The theory of intuitionistic fuzzy (IF) set is well suitable to deal with the vagueness and hesitancy. In the present communication, we have considered R-norm entropy with both
uncertainty and hesitancy degree of an IF set. Using this R-norm entropy, we have solved a multiple attribute decision making (MADM) problem in which attribute values are expressed with IF values. In MADM problem, we mainly encounter with two types of problems. First is when we don’t have any information regarding attribute weights and second is when we have little information about weights, i.e., they are partially known to us. In this paper, we have considered both the cases with examples. For the first case, we have used an extension
of entropy weight method to calculate the attribute weights and in second case attribute weights are calculated by using the minimum entropy principle method which is based on solving a linear programming model. The two methods are effectively explained by taking real life examples. Also the two examples are calculated by using the TOPSIS method suggested by Chen and Tsao and shown that the outputs of both the methods coincide.
<br>Mon, 13 Feb 2017 07:57:36 GMTStationary Queue Length Distribution for a Discrete-Time Preemptive Priority Queue
http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109392
title: Stationary Queue Length Distribution for a Discrete-Time Preemptive Priority Queue abstract: This paper considers a discrete-time Geo/Geo/1 preemptive priority queue with two
classes of customers. The queue system can be modeled by a quasi-birth-and-death (QBD)
process with infinitely many phases. For the QBD process, we obtain explicit form of the
joint stationary distribution and then we also get the stationary queue length distribution for lower-priority customers.
<br>Mon, 13 Feb 2017 07:39:34 GMTBank Lending with Capped Credit Risk, Hedging Efficiency, and Government Capital Injection
http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/109388
title: Bank Lending with Capped Credit Risk, Hedging Efficiency, and Government Capital Injection abstract: This paper examines bank efficiency gain/loss from loan swap diversification under gov- ernment capital injection when the borrowing firm’s risk exposure in the product market is explicitly considered. The lending function of the bank creates specific risk characteristics of the borrowing firm and the necessity to model the equity of the bank as a capped call option. Using a contingent claim model of a bank-borrowing firm structure with capped call valuation, we find that loan swap diversification leads to higher efficiency gain for the bank. We also show that the bank increases interest margin, decreases equity risk, and increases efficiency gain as a reaction to an increase in the government’s capital injection. Bank effi- ciency which ignores the capped credit risk from the borrowing firm leads to loss from loan
swap diversification. In the case where the cap is ignored, an increase in the government’s capital injection increases bank efficiency loss.
<br>Tue, 17 Jan 2017 03:57:10 GMT