Advanced Materials Research Vols. 383-390

Abstract: Bullwhip Effect, Particle Swarm Optimization, Supply Chain, Demand Information Abstract. A deformation phenomenon occurring in business activity, called the bullwhip effect which comes from the demand information is not fully shared among the members of a supply chain, conducts the upstream manufacturer to excessively anticipate the demand capacity of the downstream retailer. The manufacturer improperly decides the amount of the products not only to raise the inventory cost on the way of poorly handling the actually downstream demand, but also to lose the chance of business deals due to its backordering. To cope with the bullwhip effect by taking into account the holding and backorder costs, an evolutionary method based on the Particle Swarm Optimization (PSO) algorithm to estimate the critical parameter, mean downstream demand, is proposed and computer validated in this paper such that the estimated inventory level could be close the really batch ordering of the manufacturer.

Abstract: There are many kinds of energy loss indicators in power plant, and there are some relevance among the various indicators. So extraction of the key indicators plays an important role between in energy loss analysis of power plants and optimal management of thermal power plants. Based on the characteristics of these indicators, the idea of rough sets was applied to the energy loss analysis of thermal power plants, then we proposed a new algorithm -- use fuzzy C means algorithm (FCM) to discrete cluster the energy loss indicators of thermal power plant, and then analysis simplified the results with algorithm Johnson. Real experiments (Chaozhou 1,2 and Ningde 3,4 assembling units which of the same type in the SIS system under the THA working condition)’ results had proved high accuracy and valuable of the algorithm.

Abstract: It is complex to simulate the system with continue controlled object and discrete controller, in order to avoid the complexity, a new method to describe the continue controlled object of internal combustion engine with discrete model was given, which is based on the principle of the total energy of an isolated system is constant and the theory of heat transfer in the cylinder, for the internal combustion engine has the special cycle of operation. In the paper, an example of ethanol-gasoline internal combustion engine was given to prove the modeling way is feasible. The digital fuzzy PID controller is design and the simulation results show that the controller is workable. The discrete model will be used in digital controller design and simulation for the fuel supplying control.

Abstract: Aiming to find a solution, the method of cooperative area coverage reconnaissance for Multi-UAV system is proposed by combining centralized preplanning with distributed partial online replanning. In the preplanning, grid disintegration is applied to divide the area to be reconnoitered into task sequence of nodes and fuzzy C-means clustering algorithm is applied to conduct space distribution of task nodes; the online partial replanning is that the left UAVs automatically complete the unfinished task of the failed UAV, using the membership matrix got by clustering algorithm as a unified standard, which ensures that so long as one UAV does not fail, the reconnaissance task can be normally carried on. The simulation results show that this method, simple yet with a high robustness, can effectively solve the problem of multi-UAV cooperative area coverage reconnaissance.

Abstract: The mechanism of ultrasonic ranging has the advantages of being simple in structure, low cost, high measurement speed, and free from the environmental constrain, such as severe whether. It has been widely adopted even through there are still some shortcomings in the measurement range, such as the measurement interval limitation, wave beam over wide , poor resolution in direction, and unexpected reflection phenomenon in mirror[1-3].The main principle of ultrasonic ranging is to measure transit time that ultrasonic emits through launched probe, more specific, is the total travel time of the ultrasonic wave from the probe passing the target, reflected by the target , and then coming back to the received probe in the same route. The distance between sensor and the target is calculated by the half value of the arithmetic product between the transit time and the speed of propagation of the ultrasonic wave in the medium. The measurement for the transit time includes: Pulse-echo method, Phase difference method, and Frequency difference method [4-6]. Among the methods, the accuracy of the Pulse-echo method is always related to the size of the echo signal amplitude, which is influenced easily by environmental elements. However, it has the advantages of simple measurement circuit, easy implementation, and low cost, which leads to its wide application. Considering the problems of cross interference and aliasing effect, as well as the occasional false triggering phenomenon in the occasions of multiple ultrasonic ranging, this study designed a special ultrasonic ranging finder to avoid them by employing the technology of codec. The experimental conclusion shows that it can be reliably applied to the occasions that multiple ultrasonic range finders are adopted used at the same time.

Abstract: With the increase of new energy power generation, the requirement of smart grid and the popularity of electric vehicles, the research focus on V2G. With Electric vehicles being distributed energy storage or distributed generation, peak regulation in power system is involved in important functions of V2G. In order to achieve peak regulation function, the paper has analyzed the control relationship between the electric vehicles, V2G station and electric vehicle charge\ discharge control center, presented charge and discharge control strategy based on the two levels of electric vehicle charge\discharging control center and V2G station control layer and introduced algorithms and examples to achieve these strategies.

Abstract: The accurate delineation of geothermal resources with remote sensing technology is one hot topic in recent years. Remote sensing images used in previous studies, are mostly space multi-spectral remote sensing images, spectral resolution and spatial resolution are relatively low, difficult to accurately delineate the geothermal anomaly. Considering those research at home and abroad, using Hyperspectral resolution remote sensing images, choosing Lintong area for the study area. Because of hyperspectral remote sensing images exist in the acquisition process more obvious geometric distortion, during data processing, information extraction, geothermal anomaly delineated and so the information is needed before the image is first geometrically corrected in order to obtain high precision and high-quality remote sensing images. This research in this regard a useful exploration and obtained ideal result.

Abstract: This paper through describing the comparison between LingAo Phrase II ATWT and Tomari DAS (Diverse Actuation System) in some aspects which including function, structure, and so on. Through the comparison, the author finds the biggest difference between the systems is the manual analog devices are used in ATWT. And the author proves the full digital control system’s performance is used to defense the CCF (Common Cause Failure). Especially the Controller be detailed analyzed by FTA (Failure Tree Analysis) and unavailability, because of the controller’s important. At last the author proposes better solutions for coping with the requirement of the Defense in CCF.

Abstract: Based on the Lyapunov stability theory, an adaptive full state hybrid function projective lag synchronization (FSHFPLS) scheme is investigated in chaotic continuous-time system, and a unified adaptive controller and parameters update law are designed for achieved the projective lag synchronization up to a desired scaling function. In addition, a scheme for secure communication is presented. Numerical simulations are performed to verify and illustrate the analytical results.

Abstract: Canal reach soil of the south to north water transfer project has a certain expansibility. Concrete lining plates is puring on the soil. After about half a year of water immersion test, a certain plastic deformation has happened on the lining plates because of the expansion in the soil. In order to monitoring the whole lining plates deformation pre and post water immersion test, point clouds is collected by Terrestrial LIDAR and total station. After constructing of triangular mesh and endowing the specific color, the two group of mesh can be overlapping displayed. Deformation area can be found easily by color distortion on superposition chart. And then deformation tendency is concluded.