3 research outputs found

    The Effect of Exit Strategy on Optimal Portfolio Selection with Birandom Returns

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    The aims of this paper are to use a birandom variable to denote the stock return selected by some recurring technical patterns and to study the effect of exit strategy on optimal portfolio selection with birandom returns. Firstly, we propose a new method to estimate the stock return and use birandom distribution to denote the final stock return which can reflect the features of technical patterns and investors' heterogeneity simultaneously; secondly, we build a birandom safety-first model and design a hybrid intelligent algorithm to help investors make decisions; finally, we innovatively study the effect of exit strategy on the given birandom safety-first model. The results indicate that (1) the exit strategy affects the proportion of portfolio, (2) the performance of taking the exit strategy is better than when the exit strategy is not taken, if the stop-loss point and the stop-profit point are appropriately set, and (3) the investor using the exit strategy become conservative

    A Hybrid Intelligent Algorithm for Optimal Birandom Portfolio Selection Problems

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    Birandom portfolio selection problems have been well developed and widely applied in recent years. To solve these problems better, this paper designs a new hybrid intelligent algorithm which combines the improved LGMS-FOA algorithm with birandom simulation. Since all the existing algorithms solving these problems are based on genetic algorithm and birandom simulation, some comparisons between the new hybrid intelligent algorithm and the existing algorithms are given in terms of numerical experiments, which demonstrate that the new hybrid intelligent algorithm is more effective and precise when the numbers of the objective function computations are the same

    Empirical studies on pedestrian dynamics:evacuation and queue

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    Studies on egress time spatial, temporal progression of pedestrian inside a hall are important for deign of exit of halls. Pedestrians act is different in some situations. Study experiments on evacuation from a hall are conducted to realize the impact of exits and the geometry of the flow space on pedestrian flow. This in an attempt to study the impact of geometric variations in Hall on the flow of pedestrians; how to behave pedestrians in the flow or motion are studied. The impact of geometry on flow is studied in terms of lateral and longitudinal variations in densities and longitudinal variations in speed along the Hall. These results may help in enclosed space geometry and exits. Evacuation experiments designed to investigate the progression of pedestrians in a hall have been conducted. And also study one of the interesting pedestrian flow spaces is queue before point based server. Only, it should be such that our generalized model can explain every situation. Hither, the primary idea of the model remains the same; but requires some switches are off and applying some changes. In this study, we are assuming that we are unable to change the arrival distribution, arrival source, service distribution, number of servers and service discipline. Here we will consider the pedestrian behavior in queue at microscopic level and some measuring parameters in macroscopic level. The amounts of these macroscopic parameters are necessary for queue space design
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