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seamount chains and hotspot tracks:superficially similar,deeply different

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Geoscience Frontiers 2023年第6期14卷 307-326页

作者： Edgardo cañón-Tapia División de Ciencias de la Tierra CICESE.Carretera Ensenada-Tijuana#3985Ensenada Baja CaliforniaCP 22860Mexico

Nearly 80%of the seafloor extension has not been covered by high-resolution bathymetry,impeding direct observation of ***,lists of seamount location and height at a global scale have been produced using different *** this work four of such databases(publicly available)are compared with each other to assess their *** identify large differences among databases that could have exerted strong influences on models of seamount production and associated geodynamic *** those differences,it is shown that all databases allow the identification of seamount lines both along the present-day Mid Ocean Ridge(MOR)system and on intraplate ***,those seamount lines do not coincide with the so-called hotspot tracks that commonly were defined by selectively focusing attention on the larger *** of all the databases also shows that distinction based only on seamount size between seamounts produced at Mid-Ocean Ridge(MOR)environments from those associated with mantle-plum fed-hotspot activity has been ***,combined with the fact that most seamount lines defined by the available databases can be traced back to past locations of MOR indicates that most of the present-day intraplate linear arrays of seamounts,which include some large seamounts,were not produced by the action of underlying mantle anomalies envisaged in the form of mantle *** evidence presented here calls for a reassessment of the form in which volcanic and tectonic activities are conceptually related to each other.

关键词： seamount origin Chains of seamounts spatial distribution of volcanism Intraplate volcanism Mid Ocean Ridge volcanism

physical manipulation of ultrathin-film optical interference for super absorption and two-dimensional heterojunction photoconversion

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Chinese physics B 2018年第12期27卷 64-70页

作者： Guo-Yang ca Cheng Zhang shao-Long Wu Dong ma Xiao-Feng Li school of Optoelectronic science and Engineering &Collaborative Innovation Center ofsuzhou Nano science and Technology soochow University Suzhou 215006China Key Laboratory of Advanced Optical manufacturing Technologies of Jiangsu province Key Laboratory of Modern Optical Technologies of the Education Ministry of ChinaSoochow UniversitySuzhou 215006China school of Rail Transportation Soochow UniversitySuzhou 215131China

Ultrathin optical interference in a system composed of absorbing material and metal reflector has attracted extensive attention due to its potential application in realizing highly efficient optical absorption by using extremely thin semiconductor material. In this paper, we study the physics behind the high absorption of ultrathin film from the viewpoint of destructive interference and admittance matching, particularly addressing the phase evolution by light propagation and interface reflection. The physical manipulations of the ultrathin interference effect by controlling the substrate material and semiconductor material/thickness are examined. We introduce typical two-dimensional materials — i.e., Mos2and Wse2— as the absorbing layer with thickness below 10 nm, which exhibits ～ 90% absorption in a large range of incident angle(0°～70°). According to the ultrathin interference mechanism, we propose the ultrathin(s2/Wse2heterojunction for photovoltaic application and carefully examine the detailed optoelectronic responses by coupled multiphysics simulation. By comparing the same cells on siO2substrate, both the short-circuit current density(up to 20 ma/cm~2) and the photoelectric conversion efficiency(up to 9.5%) are found to be increased by ～200%.

关键词： photovoltaic subwavelength structures interference coating

Comparative performance analysis of stroke correspondence search methods for stroke-order free online multi-stroke character recognition

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Frontiers of Computer science 2014年第5期8卷 773-784页

作者： Wenjie ca1 seiichi UCHIDA Hiroaki sAKOE Department of Advanced Information Technology Kyushu University Fukuoka-shi 819-0395 Japan

For stroke-order free online multi-stroke charac- ter recognition, stroke-to-stroke correspondence search be- tween an input pattern and a reference pattern plays an im- portant role to deal with the stroke-order variation. Although various methods of stroke correspondence have been pro- posed, no comparative study for clarifying the relative su- periority of those methods has been done before. In this pa- per, we firstly review the approaches for solving the stroke- order variation problem. Then, five representative methods of stroke correspondence proposed by different groups, includ- ing cube search （Cs）, bipartite weighted matching （BWM）, individual correspondence decision （ICD）, stable marriage （sM）, and deviation-expansion model （DE）, are experimen- tally compared, mainly in regard of recognition accuracy and efficiency. The experimental results on an online Kanji char- acter dataset, showed that 99.17%, 99.17%, 96.37%, 98.54%, and 96.59% were attained by Cs, BWM, ICD, sM, and DE, respectively as their recognition rates. Extensive discussions are made on their relative superiorities and practicalities.

关键词： cube search bipartite weighted matching indi-vidual correspondence decision stable marriage deviation-expansion model

On the Equivalence of Multiplicative structures in Floer Homology and Quantum Homology

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Acta mathematica sinica,English series 1999年第1期15卷 53-80页

作者： Gang LiuDepartment of mathematics,UCLA,Los Angeles,ca 90095 UsAGang TianDepartment of mathematics,MIT,cambridge,ma 02139,UsA Department of mathematics UCLA Los Angeles USA Department of mathematics MIT Cambridge USA

In this paper,we will prove that Floer homology equipped with either the intrinsic or exterior product is isomorphic to quantum homology as a *** will also prove that GW-invariants in Floer homology and quantum homolo... 详细信息

关键词： Floer homology Quantum homology GW-invariants J-holomorphic curves Moduli space

Analysis and Modeling of slope stability in the Three-gorges Dam Reservoir (China)——The case of Huangtupo Landslide

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Journal of Mountain science 2011年第2期8卷 166-175页

作者： R.COJEAN Y.J.ca Centre de Géosciences Mines-ParisTech Paris France Changjiang Institute of survey Planning Design & Research CWRC Wuhan China

The water level in the Three gorges Dam reservoir is expected to change between the elevations of 145 m and 175 m, as a function of the flood control implementation and the intensity of the annual flood. As a matter of fact, the hydraulical and mechanical loadings, related to the water level modifications, will result in alterations in the slope stability conditions. The town of Badong (Hubei), of 20 000 inhabitants, is one of the towns which was submerged by the impoundment of the reservoir. As a consequence, the new town of Badong was constructed on a nearby site which appeared to be partly an unstable site. A part of this site corresponds to an old landslide, the Huangtupo landslide, the base of which had to be submerged by the water of the reservoir. The analysis of the Huangtupo landslide, taking into account various events scenarios, drainage and reinforcement measures and monitoring devices, allows to illustrate the general process implemented all along the reservoir in order to mitigate the landslide hazard.

关键词： Three gorges Dam Landslide Modelling

Achillea biebersteinii extracts suppress angiogenesis and enhance sensitivity to 5-fluorouracil of human colon cancer cells via the pTEN/AKT/mTOR pathway in vitro

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Asian pacific Journal of Tropical Biomedicine 2020年第11期10卷 505-515页

作者： Mehmet Kadir Erdoğan can Ali Ağca hakan Aşkın Department of Biology Faculty of Arts and SciencesBingol University12000BingolTurkey Department of Molecular Biology and Genetics Faculty of Arts and SciencesBingol University12000BingolTurkey Department of Molecular Biology and Genetics Faculty of SciencesAtaturk University25000ErzurumTurkey

Objective:To investigate the antiproliferative,anti-angiogenic,and apoptotic effects of extracts of Achillea biebersteinii(ABE)and combined treatments of ABE with 5-fluorouracil(5-FU)on HT-29 ***:The effects of ABE,5-FU,and combined treatments on the viability of HT-29 cells were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide *** analysis was used to determine synergism between ABE and *** apoptotic and anti-angiogenic effects were determined by cell death detection and human vascular endothelial growth factor ELIsA method,*** and translational expressions of p53,Bax,Bcl-2,p38 mapK,Akt,pTEN,and m TOR were also evaluated by real-time pCR and Western blotting ***:ABE decreased the viability of HT-29 cells in a dosedependent *** treatment of hexane,chloroform,and methanol extracts of Achillea biebersteinii with 5-FU at IC50 doses decreased the cell viability to 26.0%,19.1%,and 14.9%,respectively(ppoptosis,significantly downregulated m TOR,Akt,Bcl-2 expression,upregulated p53,Bax,pTEN,p38 mapK expression,and exhibited anti-angiogenetic ***:Our findings indicate that ABE shows synergism with 5-FU and inhibits the proliferation of HT-29 cells by inducing apoptosis and suppressing angiogenesis,which may provide biological evidence for further use of ABE in the treatment of colorectal cancer.

关键词： angiogenesis doses colon

AN INsTABILITY THEORY OF AIR-sEA INTERACTION FOR COAsTAL UpWELLING

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Advances in Atmospheric sciences 1988年第3期5卷 277-285页

作者： p.C. Chu Department of Oceanography Naval postgraduate school, Monterey, ca 93943, U.s.A. 1. Department of Oceanography Naval postgraduate school 93943 Monterey CA USA

A surface wind (seabreeze), thermally generated by differential sea surface temperature, is introduced to Gill-Clarke’s model (1974) through wind stress for investigating the effects of seabreeze on coastal upwel-ling. A coupled air-sea system is treated as an eigenvalue problem. The solutions show that the thermally forced local winds break down the coastal Kelvin wave into three parts: small-scale (Lstationary modes, mesoscale (100 kmcaying and fast-moving modes, and ’large’-scale (L>200 km) coastal Kelvin modes. The consistency of the length scale between the most growing mode predicted by this model and the observed cold/warm alternation pattern of surface water near the peruvian Coast (around 15 °s) implies that seabreeze may play some role in coastal upwelling.

关键词： mode AN INsTABILITY THEORY OF AIR-sEA INTERACTION FOR COAsTAL UpWELLING length sEA

structure and Deformation of Intermetallic Beryllides

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Journal of materials science & Technology 1994年第6期10卷 391-405页

作者： TG.Nieh(Lawrence Livermore National Laboratory, p.O.Box 808, L-350, Livermore, ca 94551, UsA ) Lawrence Livermore Natl Lab Livermore United States

Intermetallic beryllides are potential light-weight, high-temperature structural materials. In this paper. the processing techniques, microstructure. deformation, and oxidation properties of intermetallic beryllides are described. In addition to nickel beryllides (NiBe). which is treated as a model *** high beryllium-containing refractory beryllides, such as Nb2 Be17. VBe12. are also *** room temperature deformation and high-temperature creep properties of these beryllides are repor4ed. At room temperature. NiBe exhibits certain tensile ductility (~ 1 .3%). but all other beryllides are essentially brittle. Nonetheless, these beryllides become ductile at temperatures above approximately 1000℃. Their creep properties are presented. The creep properties are compared with those of intermetallic aluminides. Also. a comparison is made between the ductile-to-brittle transition behaviour of intermetallic beryllides and that of aluminides. Although beryllides are generally oxidation resistant at high temperatures, some beryllides, e.g., ZrBe13, suffer the pest reaction during oxidation at intermediate tem peratures. The pest mechanisms are proposed

关键词： BeO Res AIME structure and Deformation of Intermetallic Beryllides Mpa

pOLEs OF ZETA FUNCTIONs OF COMpLETE INTERsECTIONs

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Chinese Annals of mathematics,series B 2000年第2期21卷 187-200页

作者： WAN DAQING(Department of mathematics, University of california, Irvine, ca 92697-3875, UsA.) Department of mathematics University of California Irvine CA 92697-3875 USA

A vanishing theorem is proved for e-adic cohomology with compact support on an affine (singular) complete intersection. As an application, it is shown that for an affine complete intersection defined over a finite field of q elements, the reciprocal "poles" of the zeta function are always divisible by q as algebraic integers. A p-adic proof is also given, which leads to further q-divisibiliy of the poles or equivalently an improvement of the polar part of the AxKatz theorem for an affine complete intersection. similar results hold for a projective complete intersection.

关键词： pole Zeta function Complete intersection