download ebook perfectly matched pdf epub

Lois Richer

Safe Haven Former model Shay Parker has come home to Hope, New Mexico, seeking refuge from the nightmares that haunt her. Then she runs into childhood friend Nick Green. Rugged former football star Nick is the only one who makes Shay feel safe again. But he's dealing with problems of his own, and Shay is more than willing to help care for his orphaned niece and aging mother. When Nick suddenly makes plans to leave Hope for a new job, what will become of the trust they've built? Can they look beyond the pain of their scarred pasts to trust the healing power of love?

download ebook perfectly matched pdf epub

Heather Webber

The heat is on...When Boston psychic Lucy Valentine finds herself involved with a group of eccentric mediums trying to fine tune their abilities, she is convinced a rare spring heat wave has flushed all the local crazies out of hiding.Adding to her theory is her newest client in the Lost Loves division of Valentine, Inc., her family?s lucrative matchmaking firm. He?s an animal whisperer who hires Lucy to locate his soul mate?because his cat told him so. Finding his purrfect match, however, isn't as easy as it seems.But craziest of all is the Beantown Burner, a serial arsonist who is targeting private eye Sam Donahue, brother of Lucy?s boyfriend, Sean. With the help of her kooky psychic group, Lucy must tap into hidden abilities to catch the firebug before the fires turn deadly. She never expected to discover that the motive behind the flames hits a little too close to home...and dangerously close to her heart.

download ebook perfectly matched (the blue willow brides book #3) pdf epub

Maggie Brendan

Anna Olsen knows it's time to leave her sister's increasingly crowded house and start a life of her own. Following her sisters' examples, she becomes a mail-order bride, and after a short correspondence with clock maker and jeweler Edward Parker, she moves to Denver to become his wife. Almost immediately it's painfully apparent that Anna and Edward are very different. Anna is a free spirit who would rather be painting and enjoying the company of friends than cleaning house. Edward is a consummate perfectionist who, on their wedding day, hands Anna a list of chores that need to be done around the house daily. Can this mismatched couple see past their differences to a harmonious future? Or will their disparate passions create obstacles neither is willing to surmount? Maggie Brendan closes her Blue Willow Brides series with a heartwarming tale of true love despite misunderstanding, showing readers that God's timing is always perfect.

download ebook perfectly matched layer (pml) for computational electromagnetics pdf epub

Jean-Pierre Bérenger

This lecture presents the perfectly matched layer (PML) absorbing boundary condition (ABC) used to simulate free space when solving the Maxwell equations with such finite methods as the finite difference time domain (FDTD) method or the finite element method. The frequency domain and the time domain equations are derived for the different forms of PML media, namely the split PML, the CPML, the NPML, and the uniaxial PML, in the cases of PMLs matched to isotropic, anisotropic, and dispersive media. The implementation of the PML ABC in the FDTD method is presented in detail. Propagation and reflection of waves in the discretized FDTD space are derived and discussed, with a special emphasis on the problem of evanescent waves. The optimization of the PML ABC is addressed in two typical applications of the FDTD method: first, wave-structure interaction problems, and secondly, waveguide problems. Finally, a review of the literature on the application of the PML ABC to other numerical techniques of electromagnetics and to other partial differential equations of physics is provided. In addition, a software package for computing the actual reflection from a FDTD-PML is provided. It is available at http: //www.morganclaypool.com/page/berenger

download ebook perfectly matched multiscale simulations pdf epub

Xiaohu Liu

In this dissertation, the Perfectly Matched Multiscale Simulations (PMMS), a method of discrete-to-continuum multiscale scale computation is studied, revised and extended. In particular, the role of the Perfectly Matched Layer (PML) in PMMS is carefully studied. We show that instead of following the PML theory of continuum, the PML equations of motion in PMMS can be derived by stretching the inter-atomic equilibrium distance. As a result, the displacement solution in the PML region has the desired spatial damping property. It is also shown that the dispersion relationship in the PML region is different from the one in the original lattice. And a reflection coefficient is computed. We also incorporate the local Quasicontinuum (QC) theory with the cohesive Finite Element (FE) method to form a cohesive QC scheme which can deal with arbitrary discontinuities. This idea is built into the PMMS method to simulate a moving screw dislocation. The second part of the dissertation is to extend PMMS to finite temperature. A multiscale thermodynamics is proposed based on the idea of distributed coarse scale thermostats. Each coarse scale node is viewed as a thermostat and has part of atoms associated with it. The atomic motion at the fine scale level is governed by the Nose-Hoover dynamics. At the coarse scale, the expression of a coarse-grained Helmholtz free energy is derived and coupled thermo-mechanical equations are formulated based on it. With the proposed framework, the finite-temperature PMMS method is capable of simulating problems with drastic temperature change. Several numerical examples are computed to validate the method.

download ebook perfectly matched layer (pml) for computational electromagnetics pdf epub

Jean-Pierre Bérenger

This lecture presents the perfectly matched layer (PML) absorbing boundary condition (ABC) used to simulate free space when solving the Maxwell equations with such finite methods as the finite difference time domain (FDTD) method or the finite element method. The frequency domain and the time domain equations are derived for the different forms of PML media, namely the split PML, the CPML, the NPML, and the uniaxial PML, in the cases of PMLs matched to isotropic, anisotropic, and dispersive media. The implementation of the PML ABC in the FDTD method is presented in detail. Propagation and reflection of waves in the discretized FDTD space are derived and discussed, with a special emphasis on the problem of evanescent waves. The optimization of the PML ABC is addressed in two typical applications of the FDTD method: first, wave-structure interaction problems, and secondly, waveguide problems. Finally, a review of the literature on the application of the PML ABC to other numerical techniques of electromagnetics and to other partial differential equations of physics is provided. In addition, a software package for computing the actual reflection from a FDTD-PML is provided. It is available here.