检索结果-南通市图书馆

Certificateless network coding proxy signatures from lattice

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2023年第5期17卷 145-152页

作者： Huifang YU ning WANG School of Cyberspace Security Xi’an University of Posts&TelecommunicationsXi’an 710121China

Network coding can improve the information transmission efficiency and reduces the network resource consumption,so it is a very good platform for information *** proxy signatures are widely applied in information security ***,certificateless proxy signatures based on classical number theory are not suitable for the network coding environment and cannot resist the quantum computing *** view of this,we construct certificateless network coding proxy signatures from lattice(LCL-NCPS).LCL-NCPS is new multi-source signature scheme which has the characteristics of anti-quantum,antipollution and *** LCL-NCPS,each source node user can output a message vector to intermediate node and sink node,and the message vectors from different source nodes will be linearly combined to achieve the aim of improving the network transmission rate and network *** terms of efficiency analysis of space dimension,LCL-NCPS can obtain the lower computation complexity by reducing the dimension of proxy *** terms of efficiency analysis of time dimension,LCL-NCPS has higher computation efficiency in signature and verification.

关键词： lattice multi-source signature scheme proxy signature post-quantum

On Symmetry Flows of Noncommutative Kadomtsev-Petviashvili Hierarchy

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2005年第3X期44卷 419-425页

作者： WANG ning Department of Physics Ocean University of China Qingdao 266003 China

We discuss symmetry flows of noncommutative Kadomtsev-Petviashvili (NCKP) hierarchy. An operatorbased formulation, alternative to the star-product approach of extended symmetry flows is presented. Noncommutative additional symmetry flows of the NCKP hierarchy are formulated. A rescaling symmetry flow which is associated with the rescaling of whole coordinates is introduced.

关键词： noncommutative Kadomtsev-Petviashvili hierarchy extended symmetry flows additional symmetry flows rescaling symmetry flows

A new look on the electric spark sensitivity of nitramines

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2020年第1期16卷 10-17页

作者： Svatopluk Zeman ning Liu Institute of Energetic Materials Faculty of Chemical TechnologyUniversity of PardubiceCZ-43210 PardubiceCzech Republic Xi'an Modern Chemistry Research Institute Xi'anShaanxi710065China

Electric spark energy,E_(ES),for a 50%probability of initiation of the 14 nitramines was determined using a measuring instrument in which the electrodes are in direct contact with the *** proportional relationships were established between the logarithm of the E_(ES)values and the length of the longest N-N bond in the nitramine *** finding is compatible with the mechanism of the first step in the electro-reduction of the nitramine *** proportional relationships were found to exist between the E_(ES)values and the crystal lattice free volumes,ΔV(*** increase in theΔV values increases the nitramine's resistance to electric sparks)but there were several nitramines with the opposite course of this *** a semilogarithic relationships between the E_(ES)values and a ratio of intrinsic volumes of molecule,V_(int),to theΔV values were described as well as ambiguous linear dependence between these energies and a sum of the positive and negative extremes of the molecular surface electrostatic potentials,V_(S,∑).Several nitramines studied(always the same ones)display roughly the same distribution in the coordinate systems of relationships with lengths of the longest N-N bonds,the Vint/ΔV ratio and the sum V_(S,∑)as the independent *** was found that,typically,such relationships start from a single identical point,in effect a point corresponding to data for a structural unit from which tho studied nitramines can be hypothetically generated,and/or are converging on another point,often the one corresponding to the data for *** the findings point to a fundamental influence of the intermolecular forces on reactivity of nitramines exposed to electric sparks.

关键词： Electric spark Free volume Initiation Nitramines Sensitivity

An Optimal Control-Based Distributed Reinforcement Learning Framework for A Class of Non-Convex Objective Functionals of the Multi-Agent Network

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2023年第11期10卷 2081-2093页

作者： Zhe Chen ning Li Department of Automation Shanghai Jiao Tong UniversityShanghai 200240 Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240 Shanghai Engineering Research Center of Intelligent Control and Management Shanghai 200240China Department of Automation Tsinghua UniversityBeijing 100084China IEEE

This paper studies a novel distributed optimization problem that aims to minimize the sum of the non-convex objective functionals of the multi-agent network under privacy protection, which means that the local objective of each agent is unknown to others. The above problem involves complexity simultaneously in the time and space aspects. Yet existing works about distributed optimization mainly consider privacy protection in the space aspect where the decision variable is a vector with finite dimensions. In contrast, when the time aspect is considered in this paper, the decision variable is a continuous function concerning time. Hence, the minimization of the overall functional belongs to the calculus of variations. Traditional works usually aim to seek the optimal decision function. Due to privacy protection and non-convexity, the Euler-Lagrange equation of the proposed problem is a complicated partial differential ***, we seek the optimal decision derivative function rather than the decision function. This manner can be regarded as seeking the control input for an optimal control problem, for which we propose a centralized reinforcement learning(RL) framework. In the space aspect, we further present a distributed reinforcement learning framework to deal with the impact of privacy protection. Finally, rigorous theoretical analysis and simulation validate the effectiveness of our framework.

关键词： Distributed optimization multi-agent optimal control reinforcement learning(RL)

Renormalizable Quantum Gauge Theory of Gravity

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2002年第8期38卷 151-156页

作者： WU ning Institute of High Energy Physics P.O. Box 918-1 Beijing 100039 China

The quantum gravity is formulated based on the principle of local gauge invariance. The model discussedin this paper has local gravitational gauge symmetry, and gravitational field is represented by gauge field. In the leading-order approximation, it gives out classical Newton's theory of gravity. In the first-order approximation and for vacuum,it gives out Einstein's general theory of relativity. This quantum gauge theory of gravity is a renormalizable quantumtheory.

关键词： quantum gravity, gauge field, renormalization

Unification of Non-Abelian SU(N) Gauge Theory and Gravitational Gauge Theory

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

Communications in Theoretical Physics 2002年第10期38卷 455-460页

作者： WU ning Institute of High Energy Physics P.O. Box 918-1 Beijing 100039 China

In this paper, a general theory on unification of non-Abelian SU(N) gauge interactions and gravitationalinteractions is discussed. SU(N) gauge interactions and gravitational interactions are formulated on the similar basisand are unified in a semi-direct product group GSU(N). Based on this model, we can discuss unification of fundamentalinteractions of Nature.

关键词： quantum gravity, unified field theory, gauge field theory

Blowing-ups and Valuations on Surfaces

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 2011年第7期27卷 1305-1314页

作者： ning XU Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 P. R. China

In this paper, we show that all the nontrivial valuations on surfaces can be given by the infinite sequences of blowing-ups, and give the process of blowing-ups.

关键词： Valuation height rank totally ordered group blowing-ups

A rescaling method for correcting log-layer mismatch in detached eddy simulation

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

Science China(Physics,Mechanics & Astronomy) 2013年第6期56卷 1165-1175页

作者： HU ning State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Aerospace EngineeringCollege of EngineeringPeking University China Academy of Aerospace Aerodynamics

In order to correct the unphysical log-layer mismatch commonly encountered in detached eddy simulation(DES) of flows with attached boundary layers,a function M,ML,which has a multi-layer structure with scaling laws in each layer and a plateau related to the Kármán constant,is *** height of this plateau is found to be crucial for obtaining the correct log-layer.A target scaling function is designed which equals M,ML in the near-wall region,but with the height of plateau determined analytically from the classical *** scaling function is used as a target function according to which the resolved turbulent fluctuations are renormalized,in order to recover the height of plateau prescribed by the *** renormalization procedure guarantees the height of M,ML required by log-law,resulting in correct log layer *** method is also shown to maintain similar turbulent properties in the large eddy simulation(LES) region of DES *** it predicts the turbulent intensity *** results demonstrate the relationship between constant M,ML and log-law profile of mean velocity,and relate the Kármán constant to turbulent fluctuations,implying a complete description of turbulent structural ensemble *** proposed method can be extended to more general flows with log layers since it uses only the log-law with Kármán constant as the input,while the intercept of log layer depends on the solution of Spalart-Allmaras(SA) model in the near-wall field,where Reynolds-averaged Navier-Stokes(RANS) solutions are accurate.

关键词： detached eddy simulation hybrid RANS/LES method wall bounded turbulence log-law log-layer mismatch

Spin-Spin Interactions in Gauge Theory of Gravity, Violation of Weak Equivalence Principle and New Classical Test of General Relativity

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第6期49卷 1533-1540页

作者： WU ning Institute of High Energy Physics P.O. Box 918-1 the Chinese Academy of Sciences Beijing 100049 China

For a long time, it has been generally believed that spin-spin interactions can only exist in a theory where Lorentz symmetry is gauged, and a theory with spin-spin interactions is not perturbatively renormalizable. But this is not true. By studying the motion of a spinning particle in gravitational field, it is found that there exist spin-spin interactions in gauge theory of gravity. Its mechanism is that a spinning particle will generate gravitomagnetic field in space-time, and this gravitomagnetic field will interact with the spin of another particle, which will cause spin-spin interactions. So, spin-spin interactions are transmitted by gravitational field. The form of spin-spin interactions in post Newtonian approximations is deduced. This result can also be deduced from the Papapetrou equation. This kind of interaction will not affect the renormalizability of the theory. The spin-spin interactions will violate the weak equivalence principle, and the violation effects are detectable. An experiment is proposed to detect the effects of the violation of the weak equivalence principle.

关键词： spin-spin interactions weak equivalence principle equation of motion of a spinning particle experimental test of gravity theory post-Newtonian approximation