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世界地震译丛 1992年第1期23卷 11-14页

作者： ruff,lj 吕春来

表坛盛世“年轻力” 第四届“钟表与奇迹”上海钟表展

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商业周刊（中文版） 2024年第15期 68-77页

作者： Tommy lj 不详

第四届“钟表与奇迹”上海钟表展在西岸艺术中心圆满落幕,巩固了其作为中国制表行业重要聚集地之一的地位。在2024年8月28日至9月1日的五天时间里,展会迎来了10,000名独立访客。为期三天、内容丰富的公共活动吸引了超过5,000名来自上海... 详细信息

第四届“钟表与奇迹”上海钟表展在西岸艺术中心圆满落幕,巩固了其作为中国制表行业重要聚集地之一的地位。在2024年8月28日至9月1日的五天时间里,展会迎来了10,000名独立访客。为期三天、内容丰富的公共活动吸引了超过5,000名来自上海本地和亚太地区的钟表爱好者和终端客户,形成了一个统一而充满活力的制表文化社区,进一步肯定了展会在亚洲日益增长的影响力。

关键词：终端客户钟表展会制表第四届亚太地区聚集地上海

THE FINITE ELEMENT METHOD FOR SEMILINEARPARABOLIC EQUATIONS WITH DISCONTINUOUSCOEFFICIENTS

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Journal of Computational Mathematics 1999年第2期17卷 191-198页

作者： Feng, H Shen, lj Shenzhen Univ Normal Coll Shenzhen 518060 Peoples R China Inst Appl Phys & Computat Math Lab Computat Phys Beijing 100088 Peoples R China

In this paper we investigate the existence, uniqueness and regularity of the solution of semilinear parabolic equations with coefficients that are discontinuous across the interface, some prior estimates are obtained. A net shape of the finite elements around the singular points was designed in [7] to solve the linear elliptic problems, by means of that net, we prove that the approximate solution has the same convergence rate as that without singularity.

关键词： finite element semilinear parabolic equation discontinuous coefficients

A FAMILY OF DIFFERENCE SCHEMES WITH FOURNEAR-CONSERVED QUANTITIES FOR THE KdV EQUATION

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Journal of Computational Mathematics 1998年第2期16卷 129-140页

作者： Han, Z Shen, lj No Jiaotong Univ Dept Comp Sci & Technol Beijing 100044 Peoples R China Inst Appl Phys & Computat Math Beijing 100088 Peoples R China

We construct and analyze a family of semi-discretized difference schemes with two parameters for the Korteweg-de Vries (KdV) equation. The scheme possesses the first four near-conserved quantities for periodic boundary conditions. The existence and the convergence of its global solution in Sobolev space L-infinity(0,T;H-3) are proved and the scheme is also stable about initial values. Furthermore, the scheme conserves exactly the first two conserved quantities in the special case.

关键词： convergence difference scheme KdV equation conserved quantity

An Assessment Tool for Land Reuse with Artificial Intelligence Method

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International Journal of Automation and computing 2010年第1期7卷 1-8页

作者： Dieter D. Genske Dongbin Huang Ariane ruff Institute of Architecture and Planning University of Liechtenstein Fiirst-Franz-Josefstrasse Vaduz LI 9490 Liechtenstein Institute for Environmental Decisions ETH Zurich Universitaetstrasse 22 Zurich CH 8092 Switzerland Fachhochschule Nordhausen Weinberghof 4 Nordhausen D-99734 Germany

This paper focuses on land resource consumption due to urban sprawl. Special attention is given to shrinking regions, characterized by economic decline, demographic change, and high unemployment rates. In these regions, vast terrain is abandoned and falls derelict. A geographic information system （GIS） based multi-criteria decision tool is introduced to determine the reuse potential of derelict terrain, to investigate the possible reuse options （housing, business and trade, industry, services, tourism and leisure, and re-greening）, and to visualize the best reuse options for groups of sites on a regional scale. Achievement functions for attribute data are presented to assess the best reuse options based on a multi-attribute technique. The assessment tool developed is applied to a model region in Germany. The application of the assessment tool enables communities to become aware of their resources of derelict land and their reuse potential.

关键词： Decision support system land assessment geographic information system (GIS) sustainable development artificial intelligence.

HILBERT PROBLEM 15 AND NONSTANDARD ANALYSIS(Ⅰ)

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Acta Mathematica Scientia 2020年第1期40卷 1-15页

作者： Banghe lj KLMM Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

Hilbert problem 15 required understanding Schubert's *** this book,reducing to degenerate cases was one of the main methods for *** found that nonstandard analysis is a suitable tool for making rigorous of Schubert's proofs of some results,which used degeneration method,but are obviously not *** this paper,we give a rigorous proof for Example 4 in Schubert's book,Chapter 1.§4 according to his *** shows that Schubert's intuitive idea is correct,but to make it rigorous a lot of work should be done.

关键词： Hilbert problem 15 nonstandard analysis enumeration geometry

From blood to gut: Direct secretion of cholesterol via transintestinal cholesterol efflux

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World Journal of Gastroenterology 2010年第47期16卷 5953-5957页

作者： Carlos lj Vrins Department of Medical Biochemistry Academic Medical Center

The reverse cholesterol transport pathway (RCT) is the focus of many cholesterol-lowering therapies. By way of this pathway, excess cholesterol is collected from peripheral tissues and delivered back to the liver and gastrointestinal tract for excretion from the body. For a long time this removal via the hepatobiliary secretion was considered to be the sole route involved in the RCT. However, observations from early studies in animals and humans already pointed towards the possibility of another route. In the last few years it has become evident that a nonbiliary cholesterol secretion pathway exists in which the intestine plays a central role. This transintestinal cholesterol efflux (TICE) pathway contributes significantly to the total fecal neutral sterol excretion. Moreover, recent studies have shown that TICE is also sensitive to stimulation. As a consequence, the direct role of cholesterol secretion from blood via TICE makes the intestine a suitable and approachable target for cholesterol removal from the body and possibly reduction of atherosclerosis. In this review, the discovery and recent findings contributing to understanding the mechanism of TICE will be discussed.

关键词： Cholesterol Intestine Transintestinal cholesterol efflux

THE NUMERICAL SOLUTION OF FIRST KIND INTEGRAL EQUATION FOR THE HELMHOLTZ EQUATION ON SMOOTH OPEN ARCS

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Journal of Computational Mathematics 2001年第5期19卷 489-500页

作者： Tang, WJ Fu, HY Shen, lj Inst Appl Phys & Computat Math Lab Computat Phys Beijing 100088 Peoples R China

Presents a study which proposed a numerical solution of first kind integral equation for the Helmholtz equation on smooth open arcs. Quadrature method used; Numerical examples.

关键词： Helmholtz equation quadrature method

Catalytic Enantioselective Methanolysis of 4 -substituted-2-phenyl-5(4H)-oxazolones by Cinchonine

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Chinese Chemical Letters 1998年第7期9卷 605-606页

作者： Xie, lj Hua, WT Beijing Univ Coll Chem & Mol Engn Beijing 100871 Peoples R China

Cinchonine alkaloid catalyzed enantioselective methanolysis of six 4-substituted 2-phenyl-5(4H)-oxazolones to (S)-methyl N-benzoyl-alpha-amino acid esters with 10-33% e.e and 72-81% yield.

关键词： cinchonine 5(4H)-oxazolone cataytic asymmetric reaction dynamic-kinetic resolution enantioselective

Topical application of platelet-rich plasma for diabetic foot ulcers: a systematic review

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World Journal of Diabetes 2018年第10期9卷 172-179页

作者： Takashi Hirase Eric ruff Salim Surani Iqbal Ratnani Department of Orthopaedic Surgery Houston Methodist Hospital Department of Plastic and Reconstructive Surgery University of Texas Medical Branch Department of Medicine Pulmonary Critical Care and Sleep Medicine Texas A and M University Department of Anesthesiology and Critical Care Houston Methodist Hospital

AIM To determine if topical application of platelet-rich plasma(PRP) to diabetic foot ulcers(DFUs) results in superior healing rates. METHODS A systematic review was registered with PROSPERO and performed using PRISMA guidelines. Level Ⅰ-Ⅳ investigations of topical PRP application in DFUs were sought in multiple databases including: MEDLINE, Web of Science, and Cochrane Central Register of Controlled Trials. The search terms used were "platelet rich plasma", "diabetes", "ulcers", and "wound". The Modified Coleman Methodology Score(MCMS) was used to analyze study methodological quality. Study heterogeneity and a mostly non-comparative nature of evidence precluded meta-analysis. Only the outcome measurements used by more than 50% of the studies were included in the data synthesis to increase power of the measurement over that of individual studies. A weighted mean of healing rate per week between PRP group vs controls were compared using two-sample z-tests using P-value of less than 0.05 for *** One thousand two hundred and seventeen articles were screened. Eleven articles(322 PRP subjects, 126 controls, PRP subject mean age 58.4 ± 7.2 years, control mean age 58.7 ± 5.9 years) were analyzed. Six articles were level Ⅱ evidence, four were level Ⅲ, and one article was level Ⅳ. The mean MCMS was 61.8 ± 7.3. Healing rate was significantly faster with PRP application compared to controls(0.68 ± 0.56 cm2/wk vs 0.39 ± 0.09 cm2/wk; P 90% of the original ulcer area was 7.8 ± 2.7 wk and 8.3 ± 3.7 wk for patients in the PRP group and control groups, respectively(P = 0.115). There were significantly lower adverse effects reported with PRP application compared to controls(7 wound infections, 1 contact dermatitis vs 14 wound infections, 1 maceration; P < 0.001).CONCLUSION The topical application of PRP for DFUs results in statistically superior healing rates and lower complication rates compared to controls.

关键词： Platelet rich plasma Diabetes Foot Ulcer Wound