Non-uniform gradient estimates for SDEs with local monotonicity conditions 

By using the coupling method and the localization technique, we establish non-uniform gradient estimates for Markov semigroups of diffusions or stochastic diffe...
《Acta Mathematica Sinica》  2020-04-07 15:26 下载次数(0)| 被引次数(0)

基于Policy Gradient算法的PoW挖矿困境研究 

针对区块链中工作量证明共识机制(Proof of Work,PoW)下区块截留攻击导致的挖矿困境问题,将矿池间的博弈行为视作迭代的囚徒困境模型(Iterative Prisoner s Dilemma,IPD),采用深度强化学习的策略梯度(policy gradient)算法研究IPD的策略选择。利用该算法将每个矿池视...
《计算机应用》  2019-01-21 09:47 下载次数(178)| 被引次数(0)

Subspace Minimization Conjugate Gradient Method Based on Cubic Regularization Model for Unconstrained Optimization 

Many methods have been put forward to solve unconstrained optimization problems, among which conjugate gradient method (CG) is very important. With the increasi...
《Journal of Harbin Institute of Technology(New series…》  2020-03-06 11:11 下载次数(7)| 被引次数(0)

Definition of the seismic field of the underground sources in the ambient seismic noise in the Tien Shan region using a three-component gradient system 

This paper considers the new approach to solving the problem of quantitative estimation of the microseism energy for underground sources that is based on the sy...
《Journal of Earth Science》  2020-05-07 10:12 下载次数(7)| 被引次数(0)

英语空间介词渐变特征的具身研究 

自20世纪80年代以来,随着认知语言学的兴起,越来越多的语言学家开始从认知层面研究语言。在这项研究领域当中,无论是第一代认知语言学家还是第二代认知语言学家,他们都对空间介词产生了极其浓厚的兴趣,并从不同角度研究并分析了空间介词。比如莱考夫和约翰逊在《我们赖以生存的隐喻》一书当中,介绍了空间隐喻,并着重指出了空间介词,同...
延安大学  硕士论文  2014年 下载次数(117)| 被引次数(0)

A comparative analysis of optimization and generalization properties of two-layer neural network and random feature models under gradient descent dynamics 

A fairly comprehensive analysis is presented for the gradient descent dynamics for training two-layer neural network models in the situation when the parameters...
《Science China Mathematics》  2020-02-05 10:58 下载次数(10)| 被引次数(0)

Gravity and gravity gradient changes caused by a point dislocation 

GravityandgravitygradientchangescausedbyapointdislocationJian-LiangHUANG;HuiLIandRui-HaoLI(黄建梁,李辉,李瑞浩)(InstituteofSeismology,...
《Acta Seismologica Sinica(English Edition)》  1995年 第01期 下载次数(21)| 被引次数(2)

大陆财富管理业特点研究:一个来自台湾银行业的视角 

财富管理业务在银行零售业务中涉及的范围最广,交易行为最复杂。随着大陆经济迅速发展与富有阶层数量快速增加,中高端客户对银行的要求不再仅止于存款与贷款,也希望能藉由金融商品的投资累积财富,因此对专业理财的需求也大量的提升。对大陆地区传统银行而言,对内应付日渐复杂的客户需求,对外要面对来自世界的大型银行竞争,逐渐...
天津大学  硕士论文  2008年 下载次数(551)| 被引次数(1)

Skew-gradient representations of constrained mechanical systems 

The characteristics of stationary and non-stationary skew-gradient systems are studied. The skew-gradient representations of holonomic systems, Birkhoffian syst...
《Applied Mathematics and Mechanics(English Edition)》  2015年 第07期 下载次数(14)| 被引次数(3)

Preparation of gradient biomaterial used for artificial mechanical heart valve 

INTRODUCTIONSincetheartificialmechanicalheartvavle(AMHV)madeofmetalcoatedwithcarbonpossessesboththefavoratemachinabilityofthe...
《Chinese Journal of Biomedical Engineering(English Ed…》  1999年 第01期 下载次数(17)| 被引次数(0)

The preconditioned conjugate gradient deconvolution method and its application 

The preconditioned conjugate gradient deconvolution method combines the realization of sparse deconvolution and the optimal preconditioned conjugate gradient...
中国科学院地质与地球物理研究所2006年论文摘要集  2007-02-01 下载次数(11)| 被引次数(0)

Some geometric properties of gradient Ricci solitons 

We discuss first a necessary and sucient condition for Ricci shrinkers to have posive asymptotic volume ratio,then the lower bounds for the scalar curvatures of...
Proceedings of 2011 Nanjing Conference on Metric Geo…  2011-07-26 下载次数(9)| 被引次数(0)

Phase Change Related to Physiological Gradient in Crabapple Seedlings 

PhaseChangeRelatedtoPhysiologicalGradintinCrabappleSeedlingsTXPhaseChangeRelatedtoPhysiologicalGradientinCrabappleSeedlings①Ba...
《浙江农业大学学报》  1998年 第01期 下载次数(11)| 被引次数(0)

The formation of Ca~(2+) gradient at the cleavage furrow during cytokinesis of zebrafish embryos 

Spatiotemporal patterning of intracellular Ca~(2+) is crucial in regulating cell functions in eukaryotic cells.In dividing zebrafish embryo,a local Ca~(2+) e...
中国生理学会第23届全国会员代表大会暨生理学学术大会论…  2010-10-18 下载次数(4)| 被引次数(0)

Isolation of synaptic and nonsynaptic mitochondria from brain by iodixanol density gradient centrifugation 

Isolation of synaptic and nonsynaptic mitochondria from brain by iodixanol density gradient centrifugation Lin Yuan-Xi,Wan Tian-Lang(Xi an Jiaotong University S...
中国生理学会第24届全国会员代表大会暨生理学学术大会论…  2014-10-24 下载次数(15)| 被引次数(0)

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