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A Bilinear Immersed Finite Volume Element method for the Diffusion Equation with Discontinuous Coefficient

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Communications in Computational Physics 2009年第6期6卷 185-202页

作者： X.-m.he T.Lin Y.Lin Department of mathematics Virginia TechBlacksburgVA 24060USA Department of mathematical and Statistical Science University of AlbertaEdmonton ABT6G 2G1Canada Department of Applied mathematics The Hong Kong Polytechnic UniversityKowloonHong Kong

This paper is to present a finite volume element(FVE)method based on the bilinear immersed finite element(IFE)for solving the boundary value problems of the diffusion equation with a discontinuous coefficient(interface problem).This method possesses the usual FVE method’s local conservation property and can use a structured mesh or even the Cartesian mesh to solve a boundary value problem whose coefficient has discontinuity along piecewise smooth nontrivial *** examples are provided to demonstrate features of this *** particular,this method can produce a numerical solution to an interface problem with the usual O(h2)(in L2 norm)and O(h)(in H1 norm)convergence rates.

关键词： Interface problems immersed interface finite volume element discontinuous coeffi-cient diffusion equation

ImPROVEmENT OF CARBIDE mORPHOLOGY ANDmECHANICAL PROPERTIES OF Cr12moV STEELS

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Acta metallurgica Sinica(English Letters) 2000年第5期13卷 1053-1058页

作者： Cui, X.H. Jiang, Q.C. Wang, S.Q. he, Z.m. Sch. of mat. Sci. and Eng. Jilin Univ. of Technol. Changchun 130025 China

Compared with conventional cast Cr12moV steel and forged Cr12moV steels, carbide morphology and properties of modified cast Cr12moV steels were investigated by performing hardness test, impact test, fracture toughness test, fatigue crack propagation test, metallographic examination and quantitatively metallographic analysis. The results indicate that the carbide morphology in modified cast steel is characterized by uniformly-distributed granular carbide, which is different from that of conventional cast steel, but similar to that of forged steel. the impact toughness of modified cast steel is distinctly increased to 12.75 J/cm2 from 6.8 J/cm2 in the conventional cast steel with networked carbide, because of carbide granulation. Furthermore, The fracture toughness and fatigue-crack-propagation threshold of modified cast steel are not only higher than that of the conventional cast steel, but also higher than that of the forged steels.

关键词： Alloys Carbides mechanical properties morphology

EFFECT OF mODIFICATION ON CARBIDE GRANULATION AND ITS mECHANISm

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Acta metallurgica Sinica(English Letters) 1999年第2期12卷 167-172页

作者： Wang, S.Q. Jiang, Q.C. Cui, X.H. he, Z.m. Jilin Univ of Technology Changchun China

By the modification, network carbide is disconnected at 1100 degree C through uneven dissolution at higher energy places in carbide, where there is twin or lattice distortion, and is granulated at 1130 degree C through element diffusion. The stability of m//7C//3 carbide is decreased because of the modification reducing the segregation of Cr and mo, thus the temperature, at which uneven dissolution of carbide commenced, is decreased. Also lattice distortion or defect such as twin in carbide is increased by the modification, which prompts widespread disconnections in carbide. In addition, the modification prompts element diffusion to accelerate the kinetics process of carbide granulation. (Edited author abstract) 6 Refs.

关键词： Carbides Chromium alloys Granulation modification morphology

Nutrient Balance in Relation to High Yield and Good Quality of Potato on an Acid Purple Soil in Chongqing,China

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Pedosphere 2001年第1期11卷 83-92页

作者： heTIANXIU heFUJIAN 等 SouthwestAgriculturalUniversity Chongqing410076（Chian） HokkaidoUniversity Sapporo（Japan）

A field experiment was carried out to study nutrient balance among N, P, K and mg in potato cultivation on an acid purple soil in Chongqing, China. The experiment included 8 treatments with equal P rate of 120 kg P2O5 hm-2: N0K2, N1K2, N2K2, N3K2, N2K0, N2K1, N2K1mg and N2K3, where N0, N1, N2 and N3 stand for the N rates of 0, 75, 150 and 225 kg N hm-2, and K0, K1, K2 and K3 for the K rates of 0, 165, 330 and 495 kg K2O hm-2, respectively. Among the treatments designed, Thatment N2K2 with a nutrient supply ratio of N:P2O5:K2O:mgO = 1.25:1:2.75:0.28 gave the highest tuber yield and dry matter, highest starch and Zn and lowest NO3- contents in tuber, and high N, P and K use efficiency with an uptake ratio of N:P:K:mg = 11.38:1:13.32:0.33 by tuber. Yield and starch and protein contents of tuber were the lowest in Treatment N0K2. Dry matter was the lowest but protein and NO3- contents were the highest in Treatment N2K0. Treatment N2K1mg had the highest N, P and K utilization rates. Statistical analysis showed that yields of tuber and starch were in a positive linear correlation with the uptake amount of various nutrients and protein of the potato tuber was in a significantly positive linear correlation with tuber N cotent and in a significantly negative linear correlation with tuber K and mg contents. Balanced application of N, P, K and mg fertilizers (Treatmeat N2K2) was recommended for realization of high yield and good quality in potato cultivation.

关键词： acid purple soil nutrient balance potato

Excitation of Non-atmospheric Polar motion by the migration of the Pacific Warm Pool

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Excitation of Non-atmospheric Polar Motion by the Migration ...

Study on the lateral pterygoid muscle status after artifificial temporomandibular joint replacement

作者： ZHOU Y.H. YAN X.H. DING X.L. LIAO X.H. ZheNG D.W. PAN J.Y. FANG m.Q. he m.X. LIU W.T. Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 United Center for Astrogeodynamics Research Chinese Academy of Sciences Shanghai China Graduate College of marine Studies University of Delaware Newark Delaware 19716 USA Also a Cheung Kong Chair Professor of Ocean University of China Qingdao China Department of Land Surveying and Geo-Informatics Hong Kong Polytechnic University Hong Kong Ocean Remote Sensing Institute Ocean University of China Qingdao China Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 USA

Changes in the annual variation of the Earth’s polar motion are found to be largely caused by the variation of the atmospheric angular momentum (AAm). Recent simulation results of oceanic general circulation models further suggested global oceanic effects on the annual polar morion other than the atmosphere. In comparison with previous model studies of global oceanic effects, this research particularly singles out a large-scale ocean anomaly and investigates its effect on the annual polar motion, determined from satellite observations of the movement of the Western Pacific Warm Pool (WPWP). Although the scale of the warm pool is much smaller than that of the solid Earth, analysis of the non-atmospheric polar motion excitation has shown that the WPWP contributes nonnegligibly to the annual polar motion. The analysis consists of over thirty years of the WPWP data (1970 ～2000) and shows values of the polar motion excitation for the x-component of (2.5mas, -79°) and (0.6mas, 173°) for the y-component. Comparing this result with the total geodetic nonatmospheric polar motion excitation of (10.3mas, 59°) for the x-component and (10.6mas, 62°) for the y-component, shows the significance of the WPWP. Changes in the Earth’s polar motion have attracted significant attention, not only because it is an important geodetic issue, but also because it has significant value as a global measure of variations within the hydrosphere, atmosphere, cryosphere, and solid Earth, and hence global changes.

关键词： Polar motion Western Pacific Warm Pool Excitation

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Study on the lateral pterygoid muscle status after artifific...

北冰洋南森-加克尔洋脊具科马提岩-拉斑玄武岩趋势的鬣刺玄武岩

中华口腔医学会口腔颌面放射专业委员会第21次全国学术会议暨全国口腔颌面医学影像学专题研讨会

作者： Q.SUN D.m he Department of Radiology Ninth People's Hospital Shanghai Jiao Tong University School of Medicine Department of Oral Surgery Ninth People's Hospital Shanghai Jiao Tong University School of Medicine Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology National Clinical Research Center of Stomatology

The purpose of this study was to explore the status of the lateral pterygoid muscle(LPm) after detachment in artifificial temporomandibular joint replacement(TJR) surgery. Patient clinical and computed tomography imaging data were collected before and after unilateral artifificial TJR with LPm detachment. The volume of the LPm on the operated and unoperated sides was measured before and after surgery(at 1, 3, 6, 12 months) using ProPlan CmF 3.0 software. The volumes of the LPm on both sides, the patient's mandibular movements, quality of life(QoL), and pain and diet scores(visual analogue scales) were evaluated and compared at the different follow-up stages. Ten patients were included in the study. After surgery, the volume of the operated LPm was signifificantly reduced to 60.78% at 3 months(P = 0.007), and gradually stabilized to 51.58% at 6 months(P = 0.025) and 54.68% at 1 year postoperative(P = 0.002). There were no signifificant LPm volume changes on the unoperated side(P = 0.67). Lateral movement of the operated joint was signifificantly reduced(P = 0.021) and correlated with the LPm volume change after surgical detachment(P = 0.042). The LPm shrank after detachment in the artifificial TJR surgery and the muscle detachment affected the movement of the replaced joint.

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地质地球化学 1993年第4期21卷 29-34页

作者： P.K.mühe 刘继顺中南工业大学

在ARK Ⅳ/3(1987)航次期间,在南森-加克尔洋脊(NGR)采集了火山岩样品。该洋脊是一个缓慢扩张(半速率约为0.5cm)的洋脊,其轴深超过5000m。NGR是迄今为止扩张最慢且最深的洋中脊,根据采样位置距轴谷的距离,计算出所研究岩石的年龄约为600k... 详细信息

在ARK Ⅳ/3(1987)航次期间,在南森-加克尔洋脊(NGR)采集了火山岩样品。该洋脊是一个缓慢扩张(半速率约为0.5cm)的洋脊,其轴深超过5000m。NGR是迄今为止扩张最慢且最深的洋中脊,根据采样位置距轴谷的距离,计算出所研究岩石的年龄约为600ka。根据岩相学和地球化学特征,即(?)刺结构、mg>70和mgO>9wt％,把该火山岩称为科马提质玄武岩。科马提质玄武岩中玄武岩纽分的暗色球状微滴,被认为是不完全岩浆混合作用的反映。该科马提质玄武岩的玄武岩端员能较好地用根据稀土元素、Ti和不相容微量元素得出NGR的玄武岩的富集特征来解释。根据Nd同位素数据和高的Sm/Nd比值,地幔交代作用[即脉状(veined)地幔模式]可能是造成NGR科马提质玄武岩的源区富集不相容元素的原因。

关键词：科马提岩拉斑玄武岩鬣刺玄武岩

Biochemical and Genetic Analysis of Plant Innate Immunity

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Biochemical and Genetic Analysis of Plant Innate Immunity

multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via heterocyclic Aramid/mXene Template‑Assisted In‑Situ Polypyrrole Assembly

中国植物病理学会2011年学术年会

作者： Ping he (Texas A&m University,College Station,TX) Texas A &m University College Station TX

＜正＞Innate immunity is triggered by the activation of immune receptors through recognition of non-self *** first line of innate immunity is triggered by detection of pathogen-associated molecular patterns（PAmPs） through pattern recognition receptors （PRRs）.In plants,PAmPs are perceived by cell-surface PRRs and mount PAmP-triggered immunity（PTI）.Successful pathogens are able to suppress PTI by producing virulence effectors,which,in turn,are recognized by plant intracellular PRRs to initiate

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Nano-micro Letters 2025年第3期17卷 37-54页

作者： Jinhua Xiong Xu Zhao Zonglin Liu he Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong he National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional mXene-basedelectromagnetic interference (EmI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/mXene@polypyrrole (PPy) (HmP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/mXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among mXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 mPa),outstanding toughness (57.6 mJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/mXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. more importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EmI shielding effectiveness (EmI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EmI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional mXene-based films with enormous application potential in EmI shielding and thermal management.

关键词： mXene Remarkable mechanical properties heterocyclic aramid Electromagnetic interference shielding Polypyrrole multifunctionality