An Improvement for GVW

来源 :系统科学与复杂性学报(英文版) | 被引量 : 0次 | 上传用户:dfg4g4354yh
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Gao,et al.(2015) gave a simple algorithm to compute Gr(o)bner bases named GVW.It can be used to compute Gr(o)bner bases for both ideals and syzygies at the same time,and the latter plays an important role in free resolutions in homological algebra.In GVW algorithms the authors need to compute all the J-pairs firstly and then use GVW criterion (which refers the criterions used in GVW) to determine which one is useless or which one the authors should do top-reduction.In this paper,based on the study of relations between J-pairs,the authors propose the concept of factor.This concept allows the authors to filter the useless J-pairs in a rather convenient way.Moreover,by using this concept,the authors may easily determine which two pairs\' J-pair need not to be computed.Besides,the Gr(o)bner basis which the authors obtained is relatively simpler than the one in GVW.
其他文献
季节性波动数据具有长期趋势性、季节波动性与局部随机振荡性等复杂特征,这给其预测模型的合理构建造成了难度.文章首先通过排序函数f(xik)挖掘季节波动数据中相关元素的序位关系及其演变规律,实现了季节波动数据的特征提取及驱动项的构造.然后通过构建分数阶多变量灰色预测模型FMGM(1,N),实现了其累加阶数从正整数到全体实数的拓展与优化.最后,将FMGM(1,N)应用于具有季节波动性特征的我国GDP月度数据的拟合与预测,建模结果显示其模拟和预测精度优于当前主流的单变量及多变量灰色预测模型、非线性回归模型、Ari
This paper investigates the exponential stability of traveling wave solutions for nonlinear delayed cellular neural networks.As a continuity of the past work (Wu and Niu,2016;Yu,et al.,2011)on the existence and uniqueness of the traveling wave solutions,i
随着油气行业市场化改革走向纵深,天然气产业迎来新的机遇与挑战.为探究中国天然气市场化改革的潜在影响,本文采用多主体建模方法,融合混合互补模型,构建包含供气商、管输商、储气商和消费者在内的天然气市场多主体混合互补系统,并以区域性的天然气市场湖北省为例,模拟和评估其在放松价格管制、管网第三方准入、储气设施完善等不同情景下的天然气市场化改革效果.结果 显示:在完全取消价格管制后,天然气终端消费市场价格上涨,需求减少.随着管网第三方准入的实施,管道利用率提高,输配成本降低,终端市场消费价格涨幅放缓,上下游价格差距
This paper studies the important problem of how to coordinate the capacity procurement model with asymmetric demand information.Under the model,the supplier has to secure necessary capacity before receiving a firm order from the manufacturer who possesses
针对车位共享平台供给与需求均随机的特征,文章构建了随机动态规划模型对共享车位的预订控制策略进行研究.基于随机动态规划模型,进一步构造了单产品分解模型和单周期分解模型对问题最优解进行分析,并证明了单产品分解模型的超模性以及单周期分解模型的凹性性质.基于分解模型,分别设计了三种预订控制算法对模型进行求解.最后,通过数值仿真验证了模型和算法的有效性.本文的研究结果将为共享平台的预订控制提供决策支持.
Option pricing problem is one of the central issue in the theory of modern finance.Un-certain currency model has been put forward under the foundation of uncertainty theory as a tool to portray the foreign exchange rate in uncertain finance market.This pa
针对缝洞型碳酸盐岩油藏储集层非均质性强、连通单元识别难度大、井间连通性认识不清和油藏高效开发困难的问题,运用相控反演与最大似然属性刻画缝洞集合体与大尺度裂缝空间展布,识别连通单元,明确井间连通方式以及剩余油潜力,基于单井动态资料进行连通性分析,验证静态资料连通性刻画结果的合理性.应用于轮古7井区轮古7-5井组注气开发,为井组注替、开发策略制定提供依据,进一步提高油藏开发效益.
Different from previous viewpoints,multivariate polynomial matrix Diophantine equations are studied from the perspective of modules in this paper,that is,regarding the columns of matrices as elements in modules.A necessary and sufficient condition of the
This study is a detailed analysis of Speculation Game,a simple agent-based model of finan-cial markets,in which the round-trip trading and the dynamic wealth evolution with variable trading volumes are implemented.Instead of herding behavior,the authors f
针对现有差模注入等效试验方法局限性导致的误差,基于电磁场理论分析了误差产生原因,提出了天线耦合途径下的校正方法,实现了注入试验结果与测试标准要求的电磁辐射试验结果等效.以复杂电磁环境下易出现干扰损伤效应的用频装备为研究对象,将通信电台这一典型用频装备作为受试设备,开展了带内和带外阻塞效应强场电磁辐射等效注入试验,提出了工作信号和干扰信号同时存在的校正方法并进行试验验证.结果 表明,接收天线为主要耦合途径下,差模注入法等效电磁辐射法的精度高,等效注入试验所需电磁功率显著小于辐射试验.