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To improve low-speed stability and dynamic response of traditional variable speed pump control systems, this study proposes a variable speed pump control system in valve-pump parallel variable structure control, where a proportional flow valve is parallel to a variable speed pump and could work at leaking status and replenishing status, and then establishes its mathematical model and then analyses...
This paper analyses the power consumption and efficiency of the Step Recovery diode (SRD)-based Ultra-Wide Band (UWB) pulser. First, the working process of typical SRD pulse generation circuit is studied based on the parameter-extracted model. Then the factors that affect the efficiency performance and power consumption, such as the driving waveform and diode parameters, are investigated. SPICE simulation...
The data in traditional DEA model are limited to crisp inputs and outputs, which cannot be precisely obtained in many production processes or social activities. At the same time, the traditional DEA model can not evaluate by using some given reference units. This paper attempts to extend the traditional DEA model and establishes a fuzzy DEA model based on sample data evaluation. To establish this...
Identity-based designated verifier signatures allow a signer to designate a specific verifier by using a simplified public identity such as name or IP address. In such a way, only the designated verifier can check the validity of signatures. In this paper, we present an ID-based strong designated verifier signature (IBSDVS) scheme from bilinear pairings, and provide the security proofs and efficiency...
Based on credibility theory, this paper presents a new class of fuzzy expected value model for data envelopment analysis (FEVM-DEA). In some special cases, such as the fuzzy inputs and fuzzy outputs are independent trapezoidal fuzzy variables, we transform the FEVM-DEA to its crisp equivalent class and discuss some basic properties of the proposed FEVM-DEA. Finally, a numerical example is given to...
Quality Control is an important aspect of quality management in manufacturing process. Quality control process usually demands multiple input and produces multiple outputs. The mathematical model of optimization efficiency is established and based on minimum-input and maximum- output DEA method to evaluate more than one homogeneous decision-making unit. Matlab is used to solve scheduling problem of...
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