检索结果-南通市图书馆

Flexible and elastic thermal regulator for multimode intelligent temperature control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

SusMat 2023年第6期3卷 843-858页

作者： Can Chen Huitao Yu Tao Lai Jun Guo Mengmeng Qin zhiguo qu Yiyu Feng Wei Feng Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjinP.R.China MOE Key Laboratory of Thermo-Fluid Science and Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’anP.R.China

As nonlinear thermal devices,thermal regulators can intelligently respond to temperature and control heat flow through changes in heat transfer capacities,which allows them to reduce energy consumption without external intervention.However,current thermal regulators generally based on high-quality crystallinestructure transitions are intrinsically rigid,which may cause structural damage and functional failure under mechanical strain;moreover,they are difficult to integrate into emerging soft electronic platforms.In this study,we develop a flexible,elastic thermal regulator based on the reversible thermally induced deformation of a liquid crystal elastomer/liquid metal(LCE/LM)composite foam.By adjusting the crosslinking densities,the LCE foam exhibits a high actuation strain of 121%with flexibility below the nematic–isotropic phase transition temperature(TNI)and hyperelasticity above TNI.The incorporation of LMresults in a high thermal resistance switching ratio of 3.8 over a wide working temperature window of 60◦C with good cycling stability.This feature originates from the synergistic effect of fragmentation and recombination of the internal LM network and lengthening and shortening of the bond line thickness.Furthermore,we fabricate a“grid window”utilizing photic-thermal integrated thermal control,achieving a superior heat supply of 13.7℃ at a light intensity of 180mW/cm^(2)and a thermal protection of 43.4℃at 1200 mW/cm^(2).The proposed method meets the mechanical softness requirements of thermal regulatormaterials with multimode intelligent temperature control.

关键词： intelligent temperature control liquid crystal elastomer liquid metal thermal regulator thermomechanical coupling

Analysis and Improvement of Steganography Protocol Based on Bell States in Noise Environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2019年第5期59卷 607-624页

作者： zhiguo qu Shengyao Wu Wenjie Liu Xiaojun Wang Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and TechnologyNanjing210044China School of Computer&Software Nanjing University of Information Science and TechnologyNanjing210044China School of Electronic Engineering Dublin City UniversityDublinIreland

In the field of quantum communication,quantum steganography is an important branch of quantum information hiding.In a realistic quantum communication system,quantum noises are unavoidable and will seriously impact the safety and reliability of the quantum steganographic system.Therefore,it is very important to analyze the influence of noise on the quantum steganography protocol and how to reduce the effect of noise.This paper takes the quantum steganography protocol proposed in 2010 as an example to analyze the effects of noises on information qubits and secret message qubits in the four primary quantum noise environments.The results show that when the noise factor of one quantum channel noise is known,the size of the noise factor of the other quantum channel can be adjusted accordingly,such as artificially applying noise,so that the influence of noises on the protocol is minimized.In addition,this paper also proposes a method of improving the efficiency of the steganographic protocol in a noisy environment.

关键词： quantum steganography quantum noise noise channel fidelity efficiency

A Novel quantum Stegonagraphy Based on Brown States

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2018年第7期56卷 47-59页

作者： zhiguo qu Tiancheng Zhu Jinwei Wang Xiaojun Wang Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and TechnologyNanjing 210044P.R.China School of Computers&Software Nanjing University of Information Science and TechnologyNanjing 210044P.R.China School of Electronic Engineering Dublin City UniversityDublinIreland

In this paper,a novel quantum steganography protocol based on Brown entangled states is proposed.The new protocol adopts the CNOT operation to achieve the transmission of secret information by the best use of the characteristics of entangled states.Comparing with the previous quantum steganography algorithms,the new protocol focuses on its anti-noise capability for the phase-flip noise,which proved its good security resisting on quantum noise.Furthermore,the covert communication of secret information in the quantum secure direct communication channel would not affect the normal information transmission process due to the new protocol’s good imperceptibility.If the number of Brown states transmitted in carrier protocol is many enough,the imperceptibility of the secret channel can be further enhanced.In aspect of capacity,the new protocol can further expand its capacity by combining with other quantum steganography protocols.Due to that the proposed protocol does not require the participation of the classic channel when it implements the transmission of secret information,any additional information leakage will not be caused for the new algorithm with good security.The detailed theoretical analysis proves that the new protocol can own good performance on imperceptibility,capacity and security.

关键词： quantum steganography quantum secure direct communication entanglement anti-noise robustness

Review of Bipolar Plate in Redox Flow Batteries:Materials,Structures,and Manufacturing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrochemical Energy Reviews 2021年第4期4卷 718-756页

作者： Zhining Duan zhiguo qu Qinlong Ren Jianfei Zhang MOE Key Laboratory of Thermo‑Fluid Science and Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Interest in large-scale energy storage technologies has risen in recent decades with the rapid development of renewable energy.The redox flow battery satisfies the energy storage demands well owing to its advantages of scalability,flexibility,high round-trip efficiency,and long durability.As a critical component of the redox flow battery,the bipolar plates provide mechanical support for the electrodes and act as a physical separator between adjacent cells,as well as constructing the internal circuit and guiding the electrolyte flow.The present work offers a comprehensive review of the development of bipolar plates in redox flow batteries,covering materials,structures,and manufacturing methods.In terms of materials,the effects of material types and composition on the compactness,mechanical strength,and electrical conductivity are summarized in detail.Furthermore,the corrosion mechanisms of bipolar plates and the corresponding detection and mitigation methods are discussed.In addition,the structures of the bipolar plates refer to the flow field designs on the surface.The advantages and disadvantages of these existing flow fields are described,and the tendencies for further optimization are also discussed.The manufacturing of composite bipolar plates in terms of material cost and preparation methods is also outlined.Based on the summary of previous research,this work provides suggestions for the future development of high-performance bipolar plates.

关键词： Redox flow battery Bipolar plate Material characteristics Structural design Manufacturing method

Improved quantum ripple-carry addition circuit

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(Information Sciences) 2016年第4期59卷 104-111页

作者： Feng WANG Mingxing LUO Huiran LI zhiguo qu Xiaojun WANG College of mathematical sciences Dezhou University Information Security and National Computing Grid Laboratory Southwest Jiaotong University Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science & Technology School of Electronic Engineering Dublin City University

A serious obstacle to large-scale quantum algorithms is the large number of elementary gates, such as the controlled-NOT gate or Toffoli gate. Herein, we present an improved linear-depth ripple-carry quantum addition circuit, which is an elementary circuit used for quantum computations. Compared with previous addition circuits costing at least two Toffoli gates for each bit of output, the proposed adder uses only a single Toffoli gate. Moreover, our circuit may be used to construct reversible circuits for modular multiplication, Cx mod M with x quantum computations.

关键词： quantum addition circuit modular multiplication CNOT gate Toffoli gate circuit complexity

quantum private comparison based on quantum dense coding

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2016年第11期59卷 195-207页

作者： Feng WANG Mingxing LUO Huiran LI zhiguo qu Xiaojun WANG College of Mathematical Sciences Dezhou University Information Security and National Computing Grid Laboratory Southwest Jiaotong University Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science & Technology School of Electronic Engineering Dublin City University

A serious problem in cloud computing is privacy information protection. This study proposes a new private comparison protocol using Einstein-Podolsky-Rosen(EPR) pairs. This protocol allows two parties to secretly compare their classical information. quantum dense coding enables the comparison task to be completed with the help of a classical semi-honest center. A one-step transmission scheme and designed decoy photons can be used against various quantum attacks. The new protocol can ensure fairness, efficiency, and security. The classical semi-honest center cannot learn any information about the private inputs of the players. Moreover, this scheme can be easily generalized using the general EPR pairs in order to improve the transmission efficiency.

关键词： private comparison multiparty secure computation classical semi-honesty center quantum dense coding general EPR pair

Minimum length key in MST cryptosystems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2017年第5期60卷 142-152页

作者： Haibo HONG Licheng WANG Haseeb AHMAD Yixian YANG zhiguo qu School of Computer Science and Information Engineering Zhejiang Gongshang University Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science & Technology

As a special factorization category of finite groups, logarithmic signature(LS) is used as the main component of cryptographic keys that operate within secret key cryptosystems such as PGM and public key cryptosystems like M ST1, M ST2 and M ST3. An LS with the shortest length is called a minimal logarithmic signature(MLS) that constitutes of the smallest sized blocks and offers the lowest complexity, and is therefore desirable for cryptographic constructions. However, the existence of MLSs for finite groups should be firstly taken into an account. The MLS conjecture states that every finite simple group has an MLS. If it holds, then by the consequence of Jordan-H¨older Theorem, every finite group would have an MLS. In fact, many cryptographers and mathematicians are keen for solving this problem. Some effective work has already been done in search of MLSs for finite groups. Recently, we have made some progress towards searching a minimal length key for MST cryptosystems and presented a theoretical proof of MLS conjecture.

关键词： MLS conjecture finite groups (minimal) logarithmic signature minimum length key MST cryp tosystems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

微通道翼型导流肋强化传热数值研究

工程热物理学报 2024年第5期45卷 1431-1439页

作者：张剑飞徐星夏毅康高伟屈治国西安交通大学热流科学与工程教育部重点实验室能源与动力工程学院西安710049

随着电子设备的集成度和功率密度的提高,电子芯片的高功耗和高集成度将使电子设备的散热量不断增加。因此,散热已成为高性能电子设备性能发展的主要瓶颈之一。本文提出了一种含翼型导流肋微通道热沉,翼型导流肋可实现局部加速和冲击掺... 详细信息

随着电子设备的集成度和功率密度的提高,电子芯片的高功耗和高集成度将使电子设备的散热量不断增加。因此,散热已成为高性能电子设备性能发展的主要瓶颈之一。本文提出了一种含翼型导流肋微通道热沉,翼型导流肋可实现局部加速和冲击掺混的双重强化传热作用。采用ANSYS FLUENT数值分析了翼型导流肋的攻角、出射角、长度和数量等主要几何参数对微通道流动传热特性的影响规律。研究发现:相比攻角和出射角,肋长度和肋数量对微通道阻力与传热性能的影响更为显著,强化传热综合性能评价表明本文提出的含翼型分流肋的微通道相比光滑微通道可在相同压降的条件下获得更高的换热量。

关键词：电子器件热管理强化传热微通道翼型导流肋:优化设计

维普期刊数据库

Multilevel Pattern Mining Architecture for Automatic Network Monitoring in Heterogeneous Wireless Communication Networks

在线全文

学校读者我要写书评

暂无评论

China Communications 2016年第7期13卷 108-116页

作者： zhiguo qu John Keeney Sebastian Robitzsch Faisal Zaman Xiaojun Wang Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and TechnologyNanjing 210044China School of Electronic Engineering Dublin City UniversityDublinIreland Network Management Lab AthloneIreland

The rapid development of network technology and its evolution toward heterogeneous networks has increased the demand to support automatic monitoring and the management of heterogeneous wireless communication networks.This paper presents a multilevel pattern mining architecture to support automatic network management by discovering interesting patterns from telecom network monitoring data.This architecture leverages and combines existing frequent itemset discovery over data streams,association rule deduction,frequent sequential pattern mining,and frequent temporal pattern mining techniques while also making use of distributed processing platforms to achieve high-volume throughput.

关键词：序列模式挖掘无线通信网络体系结构异构多层次网络管理分布式处理网络演进

维普期刊数据库