检索结果-南通市图书馆

A Note on Economic Equilibrium and Financial Networks

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2014年第1期30卷 89-98页

作者： li-ping zhang Yuan ZHOU Department of Mathematical Sciences Tsinghua University

Nagurney （1999） used variational inequalities to study economic equilibrium and financial networks and applied the modified projection method to solve the problem. In this paper, we formulate the problem as a nonlinear complementarity problem. The complementarity model is just the KKT condition for the model of Nagurney （1999）. It is a simpler model than that of Nagurney （1999）. We also establish sufficient conditions for existence and uniqueness of the equilibrium pattern, which are weaker than those in Nagurney （]999）. Finally, we apply a smoothing Newton-type algorithm to solve the problem and report some numerical results.

关键词： economic equilibrium financial networks nonlinear complementarity problem smoothing Newton method

Grassmannian precoding MU-MIMO scheme

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 105-109,117页

作者： FANG Shu li li-hua zhang ping Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

In this article, a Grassmannian precoding multiuser multiple-input multiple-output （MU-MIMO） scheme for downlink transmission is proposed. The proposed MU-MIMO scheme will perform scheduling and precoding simultaneously at the base station, to obtain both the multiuser diversity gain and the precoding gain, to maximize the system capacity. The precoding method is related to Grassmannian precoding, which extends the point-to-point single-user Grassmannian precoding to point-to-multipoint multiuser Grassmannian precoding. It provides further significant system capacity enhancement than the single user MIMO （SU-MIMO） system and also outperforms the block dia^onalization （BD） algorithm under the same simulation environment.

关键词： multiuser MIMO cochannel interference Grassmannian precoding

DEM:Deep Entity Matching Across Heterogeneous Information Networks

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2020年第4期35卷 739-750页

作者： Chao Kong Bao-Xiang Chen li-ping zhang School of Computer and Information Anhui Polytechnic UniversityWuhu 241000China

Heterogeneous information networks,which consist of multi-typed vertices representing objects and multi-typed edges representing relations between objects,are ubiquitous in the real *** this paper,we study the problem of entity matching for heterogeneous information networks based on distributed network embedding and multi-layer perceptron with a highway network,and we propose a new method named DEM short for Deep Entity *** contrast to the traditional entity matching methods,DEM utilizes the multi-layer perceptron with a highway network to explore the hidden relations to improve the performance of ***,we incorporate DEM with the network embedding methodology,enabling highly efficient computing in a vectorized ***'s generic modeling of both the network structure and the entity attributes enables it to model various heterogeneous information networks *** illustrate its functionality,we apply the DEM algorithm to two real-world entity matching applications:user linkage under the social network analysis scenario that predicts the same or matched users in different social platforms and record linkage that predicts the same or matched records in different citation *** experiments on real-world datasets demonstrate DEM's effectiveness and rationality.

关键词： heterogeneous information network entity matching network embedding multi-layer perceptron

Unconstrained Optimization Reformulations of Equilibrium Problems

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2009年第3期25卷 343-354页

作者： li ping zhang Ji Ye HAN w Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China Institute of Applied Mathematics Academy of Mathematics & Systems Science Chinese Academy of Sciences Beijing 100190 P. R. China

We generalize the D-gap function developed in the literature for variational inequalities to a general equilibrium problem （EP）. Through the D-gap function, the equilibrium problem is cast as an unconstrained minimization problem. We give conditions under which any stationary point of the D-gap function is a solution of EP and conditions under which it provides a global error bound for EP. Finally, these results are applied to box-constrained EP and then weaker conditions are established to obtain the desired results for box-constrained EP.

关键词： equilibrium problems D-gap function error bound unconstrained optimization

On the Finite Convergence of Newton-type Methods for P_0 Affine Variational Inequalities

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第9期23卷 1553-1562页

作者： li ping zhang Wen Xun XING Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China

Based on the techniques used in non-smooth Newton methods and regularized smoothing Newton methods, a Newton-type algorithm is proposed for solving the P0 affine variational inequality problem. Under mild conditions, the algorithm can find an exact solution of the P0 affine variational inequality problem in finite steps. Preliminary numerical results indicate that the algorithm is promising.

关键词： affine variational inequality non-smooth smoothing Newton method finite termination

Relativistic Configuration Interaction Calculations on Kα X-Ray Satellites of Manganese

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第1期49卷 217-220页

作者： li Hui-li li ping CHENG zhang MA Hai-Rong Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China

With contributions from Breit interaction, quantum electrodynarnics （QED） corrections and nuclear mass corrections to the initial and final levels are taken into account. The transition energies, transition probabilities, and absorption oscillator strengths of Kα x-ray from Mn XVII to Mn XXIV have been calculated by using relativistic configuration interaction （RCI） and multi-configuration Dirac Fock （MCDF） method in the active interaction approach. Compared with the only available experimental transition data on He-like and li-like manganese, the present results are in good agreement with them, and the rest of transition data of the present results are new ones. These wide range data can provide useful parameters for the study of the manganese plasma.

关键词： transition highly ionized Mn relativistic configuration interaction multi-configuration DiracFock method

Efficient and Eco-friendly Process for the Synthesis of Bi(indolyl)methanes Catalyzed by Sodium Hydrogensulfate Monohydrate in Ionic liquid n-Butylpyridinium Tetrafluoroborate

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第6期17卷 723-726页

作者： li ping zhang Yi Qun li Mei Yun ZHOU Department of Chemistry Jinan University Guangzhou 510632

Efficient electrophilic substitution reaction of indoles with various aromatic aldehydes were carried out with a catalytic amount of sodium hydrogensulfate monohydrate （NaHSO4·H20） in ionic liquid n-butylpyridinium tetrafluoroborate （[Bpy]BF4） to afford the corresponding bi（indolyl）methanes in excellent yields. The notable advantages of this protocol in terms of low cost of catalyst and ionic liquid, mild conditions, simple operation, short reaction time, high yields and recycling of the ionic liquid.

关键词： Bi(indolyl)methane ionic liquid sodium hydrogen sulfate.

A deoxidation thermodynamic model for 304 stainless steel considering multiple-components coupled reactions

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第1期31卷 74-91页

作者： Yan Yan Guang-hao Shang li-ping zhang Shao-ying li Han-jie Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing100083China Henan Jinhui Stainless Steel Industry Group Co. Ltd.Xuchang461500HenanChina Changge Jinhui Recycling Metal R&D Co. Ltd.Xuchang461500HenanChina

A thermodynamic model for predicting the equilibrium oxygens of 304 stainless steel was developed based on the theory of slag-steel equilibrium,the law of mass conservation,and the ion and molecule coexistence *** the developed model,the Fe-Cr-Mn-Si-Al-S-O-melts reaction system and CaO-MgO-CaF_(2)-FeO-MnO-Al_(2)O_(3)-SiO_(2)-Cr2O_(3)slags were *** oxygen contents calculated by the model are in good agreement with experimental results and reference *** equilibrium oxygen contents in 304 stainless steel mainly decrease with increasing binary basicity(w(CaO)/w(SiO_(2)),where w(i)is the mass percentage of component i)and decreasing *** binary basicity at 2.0 while maintaining temperatures lower than 1823 K will keep the oxygen contents in the 304 stainless steel lower than 15×10^(-6).The equilibrium oxygen contents may also be decreased with increasing content of MgO in slags,which is more significant at lower binary ***,a small amount of FeO,MnO,and Al_(2)O_(3)(about 0-2.5 wt.%)in slags has little effect on equilibrium oxygen ***,it is found that the[C]-[O]reaction may occur during refining process but will not significantly affect the equilibrium oxygen contents.

关键词： Complex deoxidation Thermodynamic model Ion and molecule coexistence theory 304 stainless steel Slag-steel reaction

An Arabidopsis mutant atcsr-2 exhibits high cadmium stress sensitivity involved in the restriction of H_2S emission

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第12期13卷 1006-1014页

作者： Ya-wei li Ze-hua GONG Yao MU Yi-xian zhang Zeng-jie QIAO li-ping zhang Zhu-ping JIN Hua li Yan-xi PEI School of life Science Shanxi UniversityTaiyuan 030006China School of Chemical Engineering and Environment North University of ChinaTaiyuan 030051China School of Environmental Science and Resources Shanxi UniversityTaiyuan 030006China

The gene AtCSR encodes peptidyl-prolyl cis/trans isomerases (PPIases) that accelerate energetically unfavorable cis/trans isomerization of the peptide bond preceding proline *** our studies,we found that AtCSR was associated with cadmium (Cd)-sensitive response in *** results show that AtCSR expression was triggered by Cd-stress in wild type *** expression of some genes responsible for Cd2+ transportation into vacuoles was induced,and the expression of the iron-regulated transporter 1 (IRT1) related to Cd2+ absorption from the environment was not induced in wild type with Cd2+ *** expression of Cd-transportation related genes was not in response to Cd-stress,whereas IRT expression increased dramatically in atcsr-2 with Cd2+ *** expression of glutathione 1 (GSH1) was consistent with GSH being much lower in atcsr-2 in comparison with the wild type with Cd2+ ***,malondialdehyde (MDA),hydrogen peroxide,and Cd2+ contents,and activities of some antioxidative enzymes,differed between the wild type and *** sulfide (H2S) has been confirmed as the third gas-transmitter over recent *** findings revealed that the expression pattern of H2 S-releasing related genes and that of Cd-induced chelation and transportation genes matched well in the wild type and atcsr-2,and H2S could regulate the expression of the Cd-induced genes and alleviate Cd-triggered ***,one possible suggestion was given:down-regulation of atcsr-2,depending on H2S gas-transmitter not only weakened Cd2+ chelation,but also reduced Cd2+ transportation into vacuoles,as well as enhancing the Cd2+ assimilation,thus rendering atcsr-2 mutant sensitive to Cd-stress.

关键词： AtCSR H2S gas-transmitter Glutathione Cadmium stress sensitivity