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QUADRICS: 作品数：17被引量：9H指数：1; 导出分析报告; 相关领域：自动化与计算机技术理学更多>>; 相关作者：刘志强都志辉杨丰李三立王晓英更多>>; 相关机构：联想(北京)有限公司河北大学清华大学更多>>; 相关期刊：《Algebra Colloquium》《Applied Mathematics》《Acta Mathematica Sinica,English Series》《Science China Mathematics》更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划北京市自然科学基金更多>>

Topologically Correct Intersection Curves of Two Trimmed Quadrics with Tolerance Control: 《Journal of Systems Science & Complexity》2024年第5期2207-2239,共33页SHAO Wenbing CHEN Falai; supported in part by the National Natural Science Foundation of China under Grant No.61972368。; Surface/surface intersection is a fundamental problem in Compute Aided Design and Geometric Modeling since it is essential to solid modeling,numerically controlled machining,feature recognition,computer animation,etc....; 关键词：Polynomial inequality system root isolation surface/surface intersection tolerance control trimmed quadrics

在复二维仿射锥上的完备余齐性一Kahler度量: 《Chinese Quarterly Journal of Mathematics》2024年第2期200-220,共21页关庄丹梁梦翔; Supported by National Natural Science Foundation of China(Grant No.12171140).; In this paper,we revisit the Kahler structures on the affine quadrics M1={z_(1)^(2)+z_(2)^(2)+z_(3)^(2)=1}in the paper by Bo Yang and Fang-Yang Zheng.We found that the Kahler structures on the complex surface are more...; 关键词：Affine quadrics Complex structure Kahler metrics Cohomogeneity one action

Clifford Deformations of Koszul Frobenius Algebras and Noncommutative Quadrics被引量：1: 《Algebra Colloquium》2024年第1期63-82,共20页Jiwei He Yu Ye; supported by ZJNSF(LY19A010011);NSFC(11971141,12371017);supported by NSFC(11971449,12131015,12371042).; A Clifford deformation of a Koszul Frobenius algebra E is a finite dimensional Z_(2)-graded algebra E(θ),which corresponds to a noncommutative quadric hypersurface E^(!)/(z)for some central regular element z∈E_(2)^(...; 关键词：Koszul Frobenius algebra Clifford deformation noncommutative quadric hypersurface maximal Cohen-Macaulay module

On the Quantum Cohomology of Blow-ups of Four-dimensional Quadrics: 《Acta Mathematica Sinica,English Series》2024年第1期313-328,共16页Jian Xun HU Hua Zhong KE Chang Zheng LI Lei SONG; supported by NSFC Grant(Grant Nos.11890662 and 11831017);supported by NSFC Grant(Grant Nos.12271532 and 11831017);supported by NSFC Grant(Grant No.11831017);Guangdong Introducing Innovative and Enterpreneurial Teams(Grant No.2017ZT07X355);supported by Guangdong Basic and Applied Basic Research Foundation(Grant No.2020A1515010876)。; We propose a conjecture relevant to Galkin’s lower bound conjecture,and verify it for the blow-ups of a four-dimensional quadric at a point or along a projective plane.We also show that Conjecture O holds in these tw...; 关键词：Quantum cohomology BLOW-UP quadric hypersurface

An Improved Algorithm for Constructing Moving Quadrics from Moving Planes被引量：1: 《Journal of Systems Science & Complexity》2017年第6期1483-1506,共24页LAI Yisheng CHEN Falai; supported by the National Natural Science Foundation of China under Grant Nos.11271328and 11571338;the Zhejiang Provincial Natural Science Foundation under Grant No.Y7080068; This paper proposes an improved algorithm to construct moving quadrics from moving planes that follow a tensor product surface with no base points, assuming that there are no moving planes of low degree following the ...; 关键词：IMPLICITIZATION moving plane moving quadric rational surface

Fitting quadrics with a Bayesian prior: 《Computational Visual Media》2016年第2期107-117,共11页Daniel Beale Yong-Liang Yang Neill Campbell Darren Cosker Peter Hall; Quadrics are a compact mathematical formulation for a range of primitive surfaces. A problem arises when there are not enough data points to compute the model but knowledge of the shape is available. This paper presen...; 关键词：geometry STATISTICS GRAPHICS computer VISION

The Arithmetic Mean Standard Deviation Distribution: A Geometrical Framework被引量：1: 《Applied Mathematics》2013年第11期1-10,共10页R. Caimmi; The current attempt is aimed to outline the geometrical framework of a well known statistical problem, concerning the explicit expression of the arithmetic mean standard deviation distribution. To this respect, after ...; 关键词：Standard Deviation n-Spaces Direction Cosines QUADRICS

On nodal prime Fano threefolds of degree 10被引量：2: 《Science China Mathematics》2011年第8期1591-1609,共19页DEBARRE Olivier ILIEV Atanas MANIVEL Laurent; supported by the project VSHMOD-2009 ANR-09-BLAN-0104-01; We study the geometry and the period map of nodal complex prime Fano threefolds with index 1 and degree 10.We show that these threefolds are birationally isomorphic to Verra threefolds,i.e.,hypersurfaces of bidegree (...; 关键词：Fano threefolds period map Torelli proldem Prym varieties intermediate Jacobian nets of quadrics

N-way blending problem of circular quadrics被引量：1: 《Science China(Information Sciences)》2010年第8期1546-1554,共9页FANG MeiE Wang GuoZhao MA WeiYin; supported by the Research Grants Council of the Hong Kong Special Administrative Region, China(Grant No. CityU 1184/06E);the National Science Foundation of China (Grant No. 60904070);the National Basic Research Program of China (Grant No. G2004CB318000); A method of blending circular quadrics with parametric patches is proposed in this paper. It needs n rational bi-cubic Bezier patches and two S-patches to blend n （n 〉 2） quadrics. Bi-cubic rational Bezier patches ...; 关键词：circular quadrics BLENDING n-way S-patch

集群高性能通信系统综述被引量：1: 《计算机科学》2007年第5期240-242,共3页杨丰都志辉刘志强; 北京市自然科学基金(4042018)资助; 本文分析对比了集群系统中几种主要的高性能通信系统:Myrinet,Infiniband和Quadrics。在硬件方面对比了链路、交换设备与主机适配器,指出各自的组成与特点。在软件方面则描述了各自的软件实现:Myrinet/GM,In-finiband/VAPI以及Quadrics/...; 关键词：集群 Myrinet Infiniband QUADRICS

QUADRICS