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PRESSURE-VELOCITY EQUILIBRIUM HYDRODYNAMIC MODELS

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Acta Mathematica Scientia 2010年第2期30卷 563-594页

作者： John w.Grove Computational Physics Group Computer Computationaland Statistical Sciences DivisionCCS-2 MS D413Los Alamos National Laboratory

This article describes mathematical models for phase separated mixtures of materials that are in pressure and velocity equilibrium but not necessarily temperature equilibrium. General conditions for constitutive model... 详细信息

关键词： Euler equations multiple phase mixtures non-equilibrium temperature mixtures

Approximate Solution of the Kuramoto-Shivashinsky Equation on an Unbounded Domain

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Chinese Annals of Mathematics,Series B 2018年第1期39卷 145-162页

作者： wael w.MOHAMMED Department of Mathematics Faculty of ScienceMansoura University Department of Mathematics Faculty of ScienceHail University

The main goal of this paper is to approximate the Kuramoto-Shivashinsky(K-S for short) equation on an unbounded domain near a change of bifurcation,where a band of dominant pattern is changing *** leads to a slow modulation of the dominant *** we consider PDEs with quadratic nonlinearities and derive rigorously the modulation equation,which is called the Ginzburg-Landau(G-L for short) equation,for the amplitudes of the dominating modes.

关键词： Multi-scale analysis Modulation equation Kuramoto-Shivashinsky equation Ginzburg-Landau equation

Annual temperatures during the last 2485 years in the mid-eastern Tibetan Plateau inferred from tree rings

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Science China Earth Sciences 2009年第3期52卷 348-359页

作者： Hans w. LINDERHOLM Regional Climate Group Department of Earth Sciences University of Gothenburg

By combining living trees and archaeological wood, the annual mean temperatures were reconstructed based on ring-width indices of the mid-eastern Tibetan Plateau for the past 2485 years. The climate variations revealed by the reconstruction indicate that there were four periods to have average tem- peratures similar to or even higher than that mean of 1970 to 2000 AD. A particularly notable rapid shift from cold to warm, we call it the "Eastern Jin Event", occurred from 348 AD to 413 AD. Calculation re- sults show that the temperature variations over the mid-eastern Tibetan Plateau are not only repre- sentative for large parts of north-central China, but also closely correspond to those of the entire Northern Hemisphere over long time scales. During the last 2485 years, the downfall of most major dynasties in China coincides with intervals of low temperature. Compared with the temperature records in other regions of China during the last 1000 years, this reconstruction from the Tibetan Plateau shows a significant warming trend after the 1950s.

关键词： mid-eastern Tibetan Plateau tree rings temperature variations dynasty’s downfall

Fan-Delta,Braid Delta and the Classification of Delta Systems

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Acta Geologica Sinica(English Edition) 1991年第4期65卷 387-400页

作者： w.E.Galloway Department of Geological Sciences University of Texas at Austin Austin Texas 78713U.S.A.

This paper mainly discusses the origin and deposhional features of fan-deltas and braid deltas. Fan-del-tas are storm discharge-dominated, while braid deltas are usually flashy flood-dominated. The two types ofdelta, like common deltas, were reworked by marine processes. Delta systems are classified into nine deltatypes on the basis of the subaerial depositional processes and the nature of marine reworking. Fan-deltas and braid deltas are of great significance for petroleum exploration. In divergent-marginforeland and intraplate rift-subsided basin settings fan-deltas often form combination traps for petroleum ac-cumulation.

关键词： Fan-Delta Braid Delta and the Classification of Delta Systems

Unfolded p53 in non-neuronal cells supports bacterial etiology of Alzheimer’s disease

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Neural Regeneration Research 2022年第12期17卷 2619-2622页

作者： Peter w.French Innlanz Limited SydneyNSWAustralia

Alzheimer’s disease has proven to be largely intractable to treatment,despite years of research,and numerous trials of therapies that target the hallmarks of the disease-amyloid plaques and neurofibrillary *** etiology of Alzheimer’s disease remains *** is a growing body of evidence for an infectious trigger of Alzheimer’s disease,and,in particular,the focus has been on the oral pathogen Porphyromonas gingivalis(***).Reports of the expression of a misfolded form of p53 in non-neuronal cells(fibroblasts,peripheral blood mononuclear cells,and B cells)and serum,which appears several years before clinical symptoms manifest,may provide further support for the role of bacteria in general,and *** in particular,in the initiation of the *** review presents a model of the pathway from initial oral infection with *** to amyloid plaque formation and neuronal degeneration,via the steps of chronic periodontitis;secretion of the inflammagens lipopolysaccharide and gingipains into the bloodstream;induction of an inflammatory response in both peripheral cells and tissues;disruption of the blood-brain barrier,and entry into the central nervous system of the inflammagens and the *** bacteria *** this model,the misfolded p53(or“unfolded p53”;up53)is induced in non-neuronal cells and upregulated in serum as a result of oxidative stress due to lipopolysaccharide from ***53 is therefore a potential biomarker for early diagnosis of the presence of a causative agent of Alzheimer’s *** dental hygiene and aggressive antibiotic treatment may prevent the patient progressing to clinical Alzheimer’s disease if serum up53 is detected at this pre-symptomatic stage.

关键词： Alzheimer’s disease gingipains lipopolysaccharide P.gingivalis periodontitis unfolded p53

The Impact of Non—Gaussian Distribution Traffic on Network Performnce

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Journal of Computer Science & Technology 2002年第1期17卷 106-111页

作者：金志刚 Oliverw.w.Yang 等 DepartmentofComputerScience TianjinUniversityTianjin300072P.R.China SchoolofInformationTechnologyandEngineering UniversityofOttawaOttawaOntarioCanadaK1N6N5

Recent extensive measurements of real-life traffic demonstrate that the probability density function of the traffic in *** a traffic model does not capture this characteristics,any analytical or simulation results will not be *** this work,we study the impact of non-Gaussian traffic on network performance,and present an approach that can accurately model the marginal distribution of real-life *** the long-and short-range autocorrelations are also *** show that the removal of non-Gaussian components of the process does not change its correlation structure,and we validate our promising procedure by simulations.

关键词： non-Gaussian self-similarity performance

Review of Late Jurassic-early Miocene sedimentation and plate-tectonic evolution of northern California:illuminating example of an accretionary margin

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Chinese Journal Of Geochemistry 2015年第2期34卷 123-142页

作者： w.G.Ernst Department of Geological & Environmental Sciences Stanford University

Production of voluminous igneous arc rocks,high-pressure/low-temperature(HP/LT) metamafic rocks,westward relative migration of the Klamath Mountains province,and U-Pb ages of deposition,sediment sources,and spatial locations of Jurassic and younger,detrital zirconbearing clastic rocks constrain geologic development of the northern California continental edge as follows:(1) At~ 175 Ma,transpressive plate underflow began to generate an Andean-type Klamath-Sierran arc along the margin.(2)Oceanic crustal rocks were metamorphosed under HP/LT conditions in an inboard,east-inclined subduction zone from~ 170-155 *** for the Red Ant blueschists,such Ethologies remained stored at depth;most HP/LT mafic tectonic blocks returned surfaceward only during mid- and Late Cretaceous time,chiefly entrained in circulating,buoyant Franciscan mud-matrix melange.(3) By ~ 165 Ma and continuing to ~ 150-140 Ma,erosion supplied volcanogenic debris to proximal Mariposa-Galice ± Myrtle overlap strata.(4) At ~ 140,immediately prior to the onset of paired Franciscan and Great Valley Group(GVG) +Hornbrook deposition,the Klamath salient was deformed and displaced ~ 100-150 km westward relative to the Sierran arc,stranding pre-existing oceanic crust on the south as the Coast Range Ophiolite(CRO).(5) After the end-ofJurassic seaward step-out of the Farallon-North American convergent plate junction,terrigineous debris began to be deposited in the outboard Franciscan trench and intervening Great Valley forearc.(6) Voluminous sedimentation and accretion of Franciscan Eastern + Central belts and GVG detritus took place during paroxysmal igneous activity and rapid,nearly orthogonal plate convergence at^125-80 Ma.(7) Sierran arc volcanism-plutonism ceased by^80 Ma in northern California,signaling a transition to shallow,nearly subhorizontal eastward plate underflow attending Laramide orogeny far to the east.(8) Presently exposed Paleogenelower Miocene Franciscan Coastal Belt sedimentary strata were

关键词：板块构造早中新世加利福尼亚州晚侏罗世增生保证金 U-Pb年龄地层沉积

PHOSPHORUS REMOVAL USING STEEL SLAG

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Acta Metallurgica Sinica(English Letters) 2006年第6期19卷 449-454页

作者： R.w. Smith Metallurgical and Materials Department Nevada University of Reno NV89503 Nevada USA

Steel slag is a byproduct produced in large amounts in the steel-making process. It is an important resource that can be effectively utilized. An experiment was described in which steel slag was tested as an adsorbent for the removal of phosphorus from waste water. Phosphorus removal depended on the amount of steel slag added, the pH value, the contact time, and the initial concentration. Under laboratory conditions when the added slag was 7.5g/L, the contact time 2h, and the pH value was equivalent to 6.5, over 99% of the phosphorus was removed; the experimental data on steel slag adsorption of phosphorus in the water fitted the Freundlich isotherm model. Steel slag was found to be very effective in adsorbing phosphorus.

关键词： steel slag waste water phosphorus removal

Almost sure stability condition of weakly coupled linear nonautonomous random systems

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Applied Mathematics and Mechanics(English Edition) 2010年第8期31卷 1033-1038页

作者： T．w．MA Department of Civil and Environmental Engineering University of Hawaii at Manoa Honolulu HI 96822 USA

In this study, the sufficient condition of almost sure stability of twodimensional oscillating systems under parametric excitations is investigated. The systems considered are assumed to be composed of two weakly coupled subsystems. The driving actions are considered to be stationary stochastic processes satisfying ergodic properties. The properties of quadratic forms are used in conjunction with the bounds for the eigenvalues to obtain, in a closed form, the sufficient condition for the almost sure stability of the systems.

关键词： almost sure stability ergodic process bound for eigenvalue