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In view of the current widely used city intersection signal control system, oriented by the concept of automatic sensor signal control, this paper tries to use a computer's procedural method, with the input of initial conditions, after automatic calculation, a result which will make the vehicles go through the intersection causing the shortest signal control delay time totally will be generated automatically,...
The nonreversibility of strategic investment and nondeterminacy of information acquired from inner and outer environment put importance on the strategic choice timing. Whether the conversion timing is chosen correctly or not has become one of the key factors influencing the conversion performance. At first, this paper analyzes the influencing factors and random characters of strategic choice timing,...
To improve the effect of existing inter-area oscillation control system in wide area network and multi-Agent system, the paper presents the control collaborative model of the inter-area oscillation based on multi-Agent and PMU for solving the problems presently such as centralized control and delay of wide-area power system in the control mode of the inter-area oscillation. It designs the monitoring...
Material procurement is the very first link in the course of construction project, which relates to project cost, quality, and time limit and so on. Therefore, the selection of supplier is particularly important. In this paper, a two-stage model of supplier selection in project has been constructed by rough set and multi-objective liner programming based approach. The application of rough set based...
Former research of transport reliability focuses on road network, few of which refer to the intersection traffic reliability in microcosmic level. The paper proposes the conception of traffic reliability based on which the supply-demand reciprocity is analyzed, and brings forward the methodology that the disabled condition should be differentiated according to distinct system functions. Aiming at...
By constructing the exponential delay cost function, we formulate the consumer decision model based on the threshold strategies in dual-mechanism, and prove that there exists a unique symmetric Nash equilibrium in which the high-valuation consumers use a threshold policy to choose between the two selling channels. Then we extend our model under general delay cost function, and find that consumers...
Firstly the necessity of the design of signal coordination control system in urban main roads is presented , and the design thinking and process of the signal coordination control system is given, then according to the design thinking and process create a model of signal coordination control system in urban main road., and Qingyang Road of LAN Zhou City is taken for example, based on the survey data...
Sequential interview is a common method for intellectual selection. In this study we formulate a sequential selection problem. In a setting where a choice sequence among candidates is established for filling a job position, the analysis explicitly takes into account the benefits from the hiring, the risk of rejection of the job offer, and the costs due to delay in filling the position. The most important...
Nowadays, most of the electrical railway tractions, especially the high-speed tractions are using AC-DC-AC power driving system. The best choice for the AC-DC link is four-quadrant PWM rectifier, which can provide controllable DC link voltage and better power factor for the grid. In high power drive applications, the switch frequency of the power semiconductor device cannot be very high, usually less...
Most of the inventory models under delay in payments only considered the relationship between the manufacturer and the retailer. However, in practice, the retailer also provides the customer with the credit period to stimulate demand. A three-echelon supply chain system with one manufacturer, one retailer and one customer is presented in this paper. From the perspective of the retailer, fuzzy inventory...
Arterial coordinate control plays a major role in urban traffic, the actual influencing factors determine the design and application of coordinated control. This paper studies the various factors that affect the design of the signal timing for arterial coordinated control system. The paper summarizes and theoretically analyzes these influencing factors , and uses the existing rules of the traffic...
The rapid development of Networks and distributed computing technologies enables inter process communication mechanism more and more important, semaphore has many advantages in the distributed inter-process communication mechanism. This article is based on the daemon and provides implements of semaphore mechanism in the distributed system inter process communication, then associates it with the traditional...
This paper addresses the H∞ control problem for networked control systems (NCSs) over multiple communication channels. A new method on the H∞ controller design is proposed to reduce the negative influences of communication constraints including signal transmission delay, data packet dropout and quantization effect. The proof techniques rely on Lyapunov function and linear matrix inequality (LMI) tools...
In the actual power system three-phase voltages are distorted and asymmetric and contain a large number of negative sequence components. Traditional ip-iq method which detect harmonic currents based on instantaneous reactive power theory will be inaccurate, so the positive sequence voltage component of A-phase need be extracted. Improved instantaneous symmetrical components structured a rotary phases...
Engineering change is one of the important issues in contract management. To strengthen management and control of engineering change have great significance for the achievement of contract management objectives. Researches on responsibilities of engineering change risk factors offer a new thought for improving level of cost management and control of engineering change. The study method in this paper...
In this paper, we want to investigate the retailer's optimal replenishment policy with defective items under cash discount and two levels of trade credit policy. Mathematical models have been derived for determining the retailer's optimal inventory cycle time so that the annual total profit is maximized. Finally, numerical examples are given to illustrate the theorem and obtain some managerial phenomena.
As multimedia real-time businesses with representative of video come into the network services, real-time performance of campus network has are influenced by similar traffic of video passing through without control. In this paper, by use of the forwarding characteristics of packet/frame switch, a strategy to reduce the self-similar traffic's impact on network performance is discussed, which is based...
There are two major factors restricting current loop bandwidth, switching frequency and digital delay. Digital delay includes A/D sampling time and PWM duty cycle update. The calculating delay is the major source of delay in the loop. The bandwidth expansion strategy was proposed. Double stator current sampling and double PWM duty cycle update were achieved in a carrier period. This paper chooses...
This paper addresses the H∞ control problem for linear systems where sensors, controllers and plants are connected by a network medium. A novel control scheme is proposed to stabilize an unstable plant by employing a time-varying sampling period method. Furthermore, the method may also compensate packet dropout and network-induced delays. The simulation results illustrate the effectiveness of the...
On the basis of robust H∞ control, the output feedback controller is presented for a class of dynamic time-varying delay network systems. The objective of designing robust H∞ controller is to achieve the desired queue size and to guarantee the asymptotic stability of the close-loop. The sufficient condition for the existence of a dynamic output feedback controller is presented via matrix inequalities...
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