28,120 research outputs found
Sensitivity analysis of fracture scattering
No full textThe understanding of seismic scattering of a finite fracture
is very important in reservoir fracture characterizations, but
the analytical solution of this problem is not available. Thus,
in this paper, we present an approach for numerical study
of the seismic response of a finite fracture.Eni-MIT Energy Initiative Founding Member Program (Eni Multiscale Reservoir Science Project)Massachusetts Institute of Technology. Earth Resources Laborator
Chen Chen, 42nd Annual ODU Literary Festival
No full textChen Chen is the author of When I Grow Up I Want to Be a List of Further Possibilities (BOA Editions, 2017), which was long-listed for the National Book Award and won the Thom Gunn Award, among other honors. Bloodaxe Books published a UK edition in June. He is also the author of four chapbooks, most recently You MUST Use the Word Smoothie (Sundress Publications, 2019) and Gesundheit! (in collaboration with Sam Herschel Wein and forthcoming from Glass Poetry Press, fall 2019). His work appears in many publications, including Poem-a-Day, The Massachusetts Review, The Best American Poetry, and The Best American Nonrequired Reading. He has received a Pushcart Prize and fellowships from Kundiman and the National Endowment for the Arts. He holds an MFA from Syracuse University and a PhD from Texas Tech University. He teaches at Brandeis University as the Jacob Ziskind Poet-in-Residence and co-runs the journal, Underblong. He lives in Waltham, Massachusetts, with his partner, Jeff Gilbert, and their pug, Mr. Rupert Gile
Supporting data used in the paper: Xi Chen, 2020, The LMARS based shallow-water dynamical core on generic gnomonic cubed-sphere geometry
No full text# Simulation results of the unstaggered shallow water model
This repository contains the supporting data used in the paper: Xi Chen, 2020, The LMARS based shallow‐water dynamical core on generic gnomonic cubed‐sphere geometry, DOI: 10.1029/2020MS002280
Organization of the repository:
The tar archive with this data submission has a:
doc directory contains a README.md with information regarding naming conventions to label the model configurations for a shallow water test simulation. Additional information can also be found in README.md. Table 4 in the paper provides additional details.
The data directory contains the supporting data files (NetCDF format).Disclaimer: "This was prepared by Xi Chen under award NA18OAR4320123 from the National Oceanic and Atmospheric Administration, U.S. Department of Commerce. The statements, findings, conclusions, and recommendations are those of the author(s) and do not necessarily reflect the views of the National Oceanic and Atmospheric Administration, or the U.S. Department of Commerce.
Artimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li 2012
No full textArtimpaza brevilineata Tian & Chen, 2012 in Tian, Chen & Li, 2012: 43, figs. 1–9. (Figs. 28a, b) Type locality: China, Yunnan, Pu’er City, Yutang. Gender: female. Date collected: 2011.V.25 (2010.V.25, in the original description, is incorrect). Collector: Li-Chao TIAN & Gui-Qiang HUANG. Paratypes: 1 female, China, Yunnan, Lincang City, 1980.VI.1, Fen LIU leg. Remarks: In the original description, the type locality is “ Yunnan, Jinghong” while it is “ Yunnan, Yutang” according to the label. “Yutang” is actually in Pu’er, not Jinghong. The first author described the type locality by mistake. In the original description, the collector was only listed as Li-Chao TIAN, which was a mistake.Published as part of Li, Zhu & Chen, Li, 2020, Primary types of longhorned beetles (Coleoptera, Cerambycidae, Vesperidae and Disteniidae) of Southwest University (SWU), pp. 25-46 in Zootaxa 4718 (1) on page 33, DOI: 10.11646/zootaxa.4718.1.2, http://zenodo.org/record/360220
Asymmetric source acoustic LWD for the improved formation shear velocity estimation
No full textMost acoustic LWD tools generate a single pure borehole mode (e.g., dipole or quadrupole) to
estimate the formation shear velocity. We propose an approach where many borehole modes are
generated and all the modes are used simultaneously to obtain a better shear estimate. In this
approach we find the best fit to the dispersion characteristics of a number of modes, rather than
one mode. We propose using an asymmetric source, that is a single source on one side of the tool,
together with arrays of receivers distributed azimuthally around the tool to allow different modes
to be identified and analyzed. We investigate such an approach using synthetic and laboratory
data. The lab data uses a scale-model LWD tool with one active sources transducer mounted on
the side of the tool. This source geometry generates monopole, dipole, and quadrupole modes
simultaneously. Four sets of receiver arrays, each separated by 90 degrees azimuthally, are used
to isolate and analyze each of these modes by adding and subtracting the signals received from
different arrays. Based on the dispersion analysis and the method of least square fitting, we find
that the by simultaneously using both dipole and quadrupole modes, we can reduce the residual
error of the best fit shear velocity. It should be noted that higher order modes (e.g., hexapole, etc)
will also be generated by an asymmetric source, and these modes could also be utilized with the
appropriate azimuthal receiver configuration
Temporal coherence of the acoustic field forward propagated through a continental shelf with random internal waves
No full textAn analytical model derived from normal mode theory for the accumulated effects of range-dependent multiple forward scattering is applied to estimate the temporal coherence of the acoustic field forward propagated through a continental-shelf waveguide containing random three-dimensional internal waves. The modeled coherence time scale of narrow band low-frequency acoustic field fluctuations after propagating through a continental-shelf waveguide is shown to decay with a power-law of range to the −1/2 beyond roughly 1 km, decrease with increasing internal wave energy, to be consistent with measured acoustic coherence time scales. The model should provide a useful prediction of the acoustic coherence time scale as a function of internal wave energy in continental-shelf environments. The acoustic coherence time scale is an important parameter in remote sensing applications because it determines (i) the time window within which standard coherent processing such as matched filtering may be conducted, and (ii) the number of statistically independent fluctuations in a given measurement period that determines the variance reduction possible by stationary averaging
Author contributions
No full textPlease browse the "Files" tag to access the appendix specifying the author - Chen Hsi Tsai's contributions to the seven papers included in the thesis
Ying Chen\u27s Impressions of Summer
No full textChapbook of narrative/personal poems by Ying Chen originally published by Finishing Line Press in 2013. Translated from the French by Peter Schulman, ODU Professor of French and International Studies.https://digitalcommons.odu.edu/worldlanguages_books/1016/thumbnail.jp
《在中法之间 — 陈伟农的艺术体验》 Zai Zhong Fa zhi jian: Chen Weinong de yishu tijian / “Between China and France. The Artistic Experience of Chen Weinong”
No full textThe author analizes the artistic production of the Chinese contemporary artist Chen Weinong, who has travelled between China and France for more ten years. In his ink paintings and calligraphies, Chen Weinong reflects the essence of both Western and Eastern cultures, succeeding in refreshing the ancient tradition as well as blazing new trails in Chinese art
Programmatic and performance observations for Two Chamber Works by Chen Yi
No full textAs a Chinese-American composer who was born and reared in China, then studied and settled in the United States, Chen Yi’s success is widely recognized around the world. However, this success is not coincidental and is closely related to her fusion of the Chinese and Western cultures in her works. At the time of this writing, Chen Yi has composed more than forty chamber works, from which the author researched two with the same instrumentation—flute, clarinet, violin, cello, and piano. By understanding Chen Yi’s life experiences and analyzing the theoretical aspects of these compositions, the author gives suggestions for ensemble, timbre, rhythm, pedaling, and performance techniques in these two chamber works by Chen Yi—Happy Rain on a Spring Night and … as like a raging fire
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