In the field of laser generated high energy density physics, hydrodynamics is a very popular approach to describe the created plasma. In the present work, we treat the energy conservation equation of the radiationhydrodynamic model [1]. Particularly, we aim to simulate spatial-time evolution of a coupled system of plasma temperature and radiation field which is provoked by absorption of intense...

This paper analyzes and processes the time sequence of carbon emissions from the perspective of the BP neural network, revealing the structure and the law of all kinds of index systems of carbon emissions and describing the dynamic characteristics of carbon emissions system. Based on the synthesis of the energy structure factors, energy efficiency factors, economic development factors, populati...

Discontinuous Galerkin methods are developed for solving the Vlasov–Maxwell system, methods that are designed to be systematically as accurate as one wants with provable conservation of mass and possibly total energy. Such properties in general are hard to achieve within other numerical method frameworks for simulating the Vlasov–Maxwell system. The proposed scheme employs discontinuous Galerki...

For the performance evaluation of coal enterprises energy conservation and reduction of pollutant emission, a new attitude index group decision-making method is proposed based on trapezoidal fuzzy numbers. Under the condition in which the information of attributes weights and decision maker weights is entirely, the attitude index is introduced firstly. By solving the fuzzy object programming fo...

In this paper, we propose to use discontinuous Galerkin methods to solve the Vlasov-Maxwell system. Those methods are chosen because they can be designed systematically as accurate as one wants, meanwhile with provable conservation of mass and possibly also of the total energy. Such property in general is hard to achieve within other numerical method frameworks to simulate the Vlasov-Maxwell sy...

The increasing demand for mobile computing has led to a large increase in the deployment of WiFi access points (APs) and the ever-increasing usage of mobile devices with limited energy capacity. Wireless cards have shown to account for about 50% of the total energy consumption in current handheld devices. For this reason, the 802.11 standard defines a Power-Save Mode (PSM) that aims at reducing...

This paper is concerned with the finite element method for nonlinear Hamiltonian systems from three aspects: conservation of energy, symplicity, and the global error. To study the symplecticity of the finite element methods, we use an analytical method rather than the commonly used algebraic method. We prove optimal order of convergence at the nodes tn for mid-long time and demonstrate the symp...

1 Present address: Energy Systems Laboratory, Texas A&M University, College Station, TX 77843-3123, USA. ABSTRACT A new method for predicting and evaluating the energy performance of large commercial and institutional buildings is developed, as an alternative to using existing comprehensive energy simulation programs like DOE-2 and BLAST, or oversimplified tools like analyzing monthly utility b...