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Orthogonal frequency division multiple (OFDM) has been introduced into long term evolution (LTE) because of its high spectral efficiency and robust anti-multipath fading ability. However, a major drawback of OFDM signals is high fluctuations of signal envelope. Peak-to-average power ratio (PAPR) is a well-known measure for the envelope fluctuations. Recently, another metric named cubic metric (CM)...
The increasing proliferation of distributed generations (DGs) in distribution networks has brought several management and operation challenges. To improve energy efficiency and voltage profiles of the distribution grids under different operating conditions, this paper propose a distributed optimal reactive power control solution combined with gradient algorithm. In the proposed method, each DG or...
A computational is a wide-area computing environment for cross-domain resource sharing and service integration. Most clouds generally emphasize sharing resources and services on demand, the scheduling strategy based on selecting resource that are near and owns more bandwidth available has better characteristics. The notion of game theory is proposed in this paper, which can be used as the criteria...
The rapid determination method of blood clinical biochemical indicators based on near infrared spectral (NIRS) analysis is an important research branch in health monitoring systems. In this paper, the rapid determination method and the optimal analysis model of serum cholesterol were established by using the NIRS technology, partial least squares (PLS) and Savitzky-Golay (SG) smoothing method. Based...
The rapid and simple analytical method for soil organic matter by near infrared spectroscopy (NIRS) is very significant in precision agriculture. In this paper, the rapid determination method and the analysis model of soil organic matter were established by using the NIRS technology, partial least squares (PLS) regression and Savitzky-Golay (SG) smoothing method. Based on the prediction effect of...
Piezoresistive micro-mechanical acceleration sensor is one of the earliest developed silicon micro-mechanical acceleration sensors in MEMS. Its cantilever beam is the main component. So the structure optimization design of the cantilever beam becomes the key. During the process of the former structure optimization of the cantilever beam, the working way between the program of FEM analysis and the...
A joint strategy of stock provision and age-based preventive maintenance is considered. The joint strategy takes the form (T, s, S), where T is scheduled preventive replacement age, s is stock reorder point and S is maximum inventory level. The optimal values of the decision variables are obtained by minimizing the total cost of maintenance and inventory. To accomplish the optimizing task, a general...
The dominant models for inventory control of repairable items, both in the literature and in practical applications, are based on the assumption of infinite or ample repair capacity. However this assumption is not accurate in practice. In this paper, a two-echelon inventory system of repairable items is studied, which has finite repair capacity. Regarding the number of repair bench at depot as one...
Spare provision under preventive maintenance can be an effective way to reduce operating costs. A joint strategy of stock provision and condition-based preventive maintenance is considered. Continuous review ordering policy (s,S) is combined with an inspection period for condition-based preventive maintenance. With a form (T,s,S), the joint strategy is evaluated by costs associated with maintenance...
A two-echelon inventory system of repairable items is considered. For the repairable items with high-value and low- demand rate that include condemnation, continuous (S-1,S) ordering strategy is adopted. Neighbor support strategy for inventory pooling is presented to obtain high service levels at a low cost. The premise of neighbor support is that it is more efficient to obtain needed stock from the...
Fuel cell electric vehicle has very good application foreground for it has some advantages, such as high efficiency and little emission, etc. In order to characterize the structure of hybrid power system for fuel cell electric vehicle, the project of parallel hybrid power system was brought forward, which consisted of fuel cell, NIH battery and DC/DC converter. The power flow of hybrid power system...
In this paper, we design a new motion planning approach for the mobile robot, which is based on an artificial immune evolution algorithm. Based on the nonholonomic constraint, the motion-planning problem of the mobile robot is transformed into an optimal control problem of the nonlinear system. Building the antibody coding and affinity function, the algorithm is described in detail and the simulation...
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