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In this paper, a modified spiking neuron circuit (MSNC) with memory threshold is presented. The MSNC can store the potential of the threshold signal at the latest firing time as threshold under the control of pulse, implying the memory of threshold. We extend the definition of the least common multiple to obtain the iterative map of firing phase of the MSNC. By studying the iterative map of firing...
This work concerns some climate models in the point of view of controllability. We obtain by the Kakutani's fixed point theorem and the controllability property of the linear parabolic equation that the climate system is null controllable both in the case with interior control and the case with boundary control.
Project risk element transmission theory puts forward a new idea of research on project risk management. This paper combined with state transfer diagram, analysed enterprise multi-project management, made concrete exposition on the thought of project chain with different risk element kinds. A tetrahedral structure model of enterprise project chain risk element transmission and controlling mechanism...
In this study we examine the revenue expenditure relationships within public and private research and doctoral institutions. Results suggest tight relationships between some revenue and expenditure categories. Instructional expenditures are significantly influenced by revenues from tuition and fees, governmental appropriations (for public institutions), and grants and contracts. These results are...
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