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Capacity analysis for cognitive heterogeneous networks with ideal/non-ideal sensing

Tao HUANG, Ying-lei TENG, Meng-ting LIU, Jiang LIU

《信息与电子工程前沿（英文）》 2015年 第16卷 第1期   页码 1-11 doi: 10.1631/FITEE.1400129

摘要： Due to irregular deployment of small base stations (SBSs), the interference in cognitive heterogeneous networks (CHNs) becomes even more complex; in particular, the uncertainty of spectrum mobility aggravates the interference context. In this case, how to analyze system capacity to obtain a closed-form expression becomes a crucial problem. In this paper we employ stochastic methods to formulate the capacity of CHNs and achieve a closed-form expression. By using discrete-time Markov chains (DTMCs), the spectrum mobility with respect to the arrival and departure of macro base station (MBS) users is modeled. Then an integral method is proposed to derive the interference based on stochastic geometry (SG). Also, the effect of sensing accuracy on network capacity is discussed by concerning false-alarm and miss-detection events. Simulation results are illustrated to show that the proposed capacity analysis method for CHNs can approximate the conventional sum methods without rigorous requirement for channel station information (CSI). Therefore, it turns out to be a feasible and efficient way to capture the network capacity in CHNs.

关键词： Cognitive heterogeneous networks     Markov chain     Stochastic geometry     Homogeneous Poisson point process (HPPP)    

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基于频谱​动态控制的异构蜂窝网络​安全高效传输方案 Article

李晨曦, 关磊, 吴华清, 承楠, 李赞, 沈学民

《工程（英文）》 2022年 第17卷 第10期   页码 220-231 doi: 10.1016/j.eng.2021.04.019

摘要：

异构蜂窝网络（heterogeneous cellular network, HCN）是一种具有发展前景的结构，可以提供无缝无线覆盖并提高网络容量

关键词： 异构蜂窝网络     频谱动态控制     传输安全     高效数据传输    

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基于最大比合并的认知无线电物理层保密性能分析 Article

Hui ZHAO,Dan-yang WANG,Chao-qing TANG,Ya-ping LIU,Gao-feng PAN,Ting-ting LI,Yun-fei CHEN

《信息与电子工程前沿（英文）》 2016年 第17卷 第9期   页码 929-937 doi: 10.1631/FITEE.1500351

摘要： 概要：在瑞利衰落信道下，本文研究了认知无线电网络中最大比合并的保密中断性能。在一个单输入多输出窃密系统中，本文考虑一个次级用户向另一个装备多根接收天线并且采用最大比合并提高其合并信噪比的次级用户发送保密信息。与此同时，一个装备多根接收天线也采用最大比合并的窃密者窃听这对合法次级用户的信息。合法次级发送者采用Underlay策略与主用户共享频谱资源的同时亦不影响主用户的通信质量。考虑上述的窃密环境，本文分别得到了精确和近似保密中断概率的闭式表达式。

关键词： 认知无线电网络；最大比合并；保密中断概率；单输入多输出    

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认知无线网络中一种基于投影梯度的多用户功率控制方法 None

Yun-zheng TAO, Chun-yan WU, Yu-zhen HUANG, Ping ZHANG

《信息与电子工程前沿（英文）》 2018年 第19卷 第3期   页码 367-378 doi: 10.1631/FITEE.1700067

摘要： 认知无线电（cognitive radio, CR）是提高频谱利用率的有效技术之一，可适应日益增长的数据流量和稀缺的频谱资源。本文研究了基于衬垫式频谱共享的认知无线网络中的次用户功率控制问题。

关键词： 认知无线网络；多用户功率控制；非合作博弈；纳什均衡；投影梯度    

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面向潜在行为预测的异构行为网络嵌入学习 Article

Yue-yang WANG, Wei-hao JIANG, Shi-liang PU, Yue-ting ZHUANG

《信息与电子工程前沿（英文）》 2020年 第21卷 第3期   页码 422-435 doi: 10.1631/FITEE.1800493

摘要： 潜在行为预测即理解特定群体潜在的人类行为，可辅助组织做出战略决策。信息技术的进步使获取人类行为的庞大数据成为可能。本文将真实场景中获取的人类行为数据构建成信息网络；该信息网络由2种对象（人和动作）和3种关系（人—人、人—动作和动作—动作）组成，称作异构行为网络（HBN）。为充分利用异构行为网络的丰富性和异构性，提出一种网络嵌入方法，称作人—行为—属性感知的异构网络嵌入（a4HNE）；该方法综合考虑网络结构邻近性、节点属性相似性和异构性融合。在两个真实数据集上的实验结果表明，该方法在各种异构信息网络挖掘任务中的潜在行为预测性能优于其他同类方法。

关键词： 网络嵌入；表示学习；人类行为；社交网络；异构信息网络；属性    

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Computational design of heterogeneous catalysts and gas separation materials for advanced chemical processing

Huaiwei Shi, Teng Zhou

《化学科学与工程前沿（英文）》 2021年 第15卷 第1期   页码 49-59 doi: 10.1007/s11705-020-1959-0

摘要： Functional materials are widely used in chemical industry in order to reduce the process cost while simultaneously increase the product quality. Considering their significant effects, systematic methods for the optimal selection and design of materials are essential. The conventional synthesis-and-test method for materials development is inefficient and costly. Additionally, the performance of the resulting materials is usually limited by the designer’s expertise. During the past few decades, computational methods have been significantly developed and they now become a very important tool for the optimal design of functional materials for various chemical processes. This article selectively focuses on two important process functional materials, namely heterogeneous catalyst and gas separation agent. Theoretical methods and representative works for computational screening and design of these materials are reviewed.

关键词： heterogeneous catalyst     gas separation     solvent     porous adsorbent     material screening and design    

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Application of heterogeneous catalysis to biodiesel synthesis using microalgae oil

《环境科学与工程前沿（英文）》 2021年 第15卷 第5期 doi: 10.1007/s11783-020-1343-9

摘要：

• Microalgae oil application for biodiesel synthesis is discussed.

关键词： Biodiesel     Heterogeneous catalysis     Transesterification     Microalgae oil    

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Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

《结构与土木工程前沿（英文）》 2023年 第17卷 第4期   页码 566-583 doi: 10.1007/s11709-023-0905-x

摘要： The analysis of the bearing capacity of strip footings sited near an excavation is critical in geotechnics. In this study, the effects of the geometrical features of the excavation and the soil strength properties on the seismic bearing capacity of a strip footing resting on an excavation were evaluated using the lower and upper bounds of the finite element limit analysis method. The effects of the setback distance ratio (L/B), excavation height ratio (H/B), soil strength heterogeneity (kB/cu), and horizontal earthquake coefficient (kh) were analyzed. Design charts and tables were produced to clarify the relationship between the undrained seismic bearing capacity and the selected parameters.

关键词： excavation     finite element limit analysis     heterogeneous soil     strip footing     undrained bearing capacity    

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Precursor-driven structural tailoring of iron oxychloride for enhanced heterogeneous Fenton activity

《化学科学与工程前沿（英文）》 2023年 第17卷 第10期   页码 1533-1543 doi: 10.1007/s11705-023-2330-z

摘要： Iron oxychloride (FeOCl) is a unique layered material with tunable electronic properties. The conventional synthetic route of chemical vapor transition involves a thermodynamics-driven gas–solid interfacial reaction which often generates macroscopic crystals with stable facets. In this study, through analyzing the effects of the synthetic parameters on the FeOCl synthesis, we discovered the dominant contribution of the α-Fe2O3 precursors on the chemical property of the FeOCl product, and subsequently developed a highly-controllable synthetic route of tailoring the FeOCl structures into small sizes and exposed high-energy facets via a facile and scalable mechanical-chemical approach. The synthesized products could be systematically tuned by the ball-milling conditions of the α-Fe2O3 precursors. With increased milling time, the FeOCl crystallites demonstrated reduced sizes and more exposed (110) facets. Intriguingly, these small-sized FeOCl catalysts exhibited much faster Fenton-like kinetics than the pristine macroscopic FeOCl materials. Specifically, FeOCl catalysts with a 12-hour milling time showed nearly 39 times higher efficiency toward phenol degradation than the pristine FeOCl. The structure-reactivity relationship was further elucidated using the combinatory analysis via density functional theory calculation, electron paramagnetic resonance and radical quenching probe experiments. This work provides a rationale for tailoring the surface structures of FeOCl crystallites for potential applications in environmental catalysis.

关键词： FeOCl     mechanical activation     heterogeneous Fenton reaction     ball milling    

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of herding behavior of tradable green certificate market players on market efficiency: Insights from heterogeneous

《能源前沿（英文）》 2023年 第17卷 第2期   页码 266-285 doi: 10.1007/s11708-021-0752-1

摘要： Tradable green certificate (TGC) scheme promotes the development of renewable energy industry which currently has a dual effect on economy and environment. TGC market efficiency is reflected in stimulating renewable energy investment, but may be reduced by the herding behavior of market players. This paper proposes and simulates an artificial TGC market model which contains heterogeneous agents, communication structure, and regulatory rules to explore the characteristics of herding behavior and its effects on market efficiency. The results show that the evolution of herding behavior reduces information asymmetry and improves market efficiency, especially when the borrowing is allowed. In addition, the fundamental strategy is diffused by herding evolution, but TGC market efficiency may be remarkably reduced by herding with borrowing mechanism. Moreover, the herding behavior may evolve to an equilibrium where the revenue of market players is comparable, thus the fairness in TGC market is improved.

关键词： tradable green certificate     herding behavior     evolution     heterogeneous agent model     complex network    

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Using heterogeneous patent network features to rank and discover influential inventors

Yong-ping DU,Chang-qing YAO,Nan LI

《信息与电子工程前沿（英文）》 2015年 第16卷 第7期   页码 568-578 doi: 10.1631/FITEE.1400394

摘要： Most classic network entity sorting algorithms are implemented in a homogeneous network, and they are not applicable to a heterogeneous network. Registered patent history data denotes the innovations and the achievements in different research fields. In this paper, we present an iteration algorithm called inventor-ranking, to sort the influences of patent inventors in heterogeneous networks constructed based on their patent data. This approach is a flexible rule-based method, making full use of the features of network topology. We sort the inventors and patents by a set of rules, and the algorithm iterates continuously until it meets a certain convergence condition. We also give a detailed analysis of influential inventor’s interesting topics using a latent Dirichlet allocation (LDA) model. Compared with the traditional methods such as PageRank, our approach takes full advantage of the information in the heterogeneous network, including the relationship between inventors and the relationship between the inventor and the patent. Experimental results show that our method can effectively identify the inventors with high influence in patent data, and that it converges faster than PageRank.

关键词： Heterogeneous patent network     Influence     Rule-based ranking    

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Elastic analysis of heterogeneous thick-walled spherical pressure vessels with parabolic varying properties

Keyhan KARAMI, Majid ABEDI, Mohammad ZAMANI NEJAD, Mohammad Hassan LOTFIAN

《机械工程前沿（英文）》 2012年 第7卷 第4期   页码 433-438 doi: 10.1007/s11465-012-0336-1

摘要：

On the basis of plane elasticity theory (PET), the displacement and stress components in a thick-walled spherical pressure vessels made of heterogeneous materials subjected to internal and external pressure is developed. The mechanical properties except the Poisson’s ratio are assumed to obey the parabolic variations throughout the thickness. Effect of material inhomogeneity on the elastic deformations and stresses is investigated. The analytical solutions and the solutions carried out through the FEM have a good agreement. The values used in this study are arbitrary chosen to demonstrate the effect of inhomogeneity on displacements, and stresses distributions.

关键词： thick-walled spherical vessels     heterogeneous materials     FGM     FEM     parabolic varying properties    

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基于Self-X认知制造网络实现认知大规模个性化定制——一种工业知识图谱及图嵌入技术使能的途径

李心雨, 郑湃, 鲍劲松, 高亮, 徐旬

《工程（英文）》 2023年 第22卷 第3期   页码 14-19 doi: 10.1016/j.eng.2021.08.018

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Enhanced heterogeneous Fenton-like activity by Cu-doped BiFeO

Jie Mao, Xie Quan, Jing Wang, Cong Gao, Shuo Chen, Hongtao Yu, Yaobin Zhang

《环境科学与工程前沿（英文）》 2018年 第12卷 第6期 doi: 10.1007/s11783-018-1060-9

摘要：

OH played a key role in heterogeneous Fenton-like catalytic oxidation of organic pollutants.

Doping Cu into BiFeO3 promoted the generation of Fe2+ and then facilitated the effective formation of •OH.

Cu-doped BiFeO3 exhibited higher catalytic performance for phenol degradation than non-doped BiFeO3.

关键词： Cu doped BiFeO3     Heterogeneous Fenton-like catalysts     Oxidative degradation    

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Fe-Mn-sepiolite as an effective heterogeneous Fenton-like catalyst for the decolorization of reactive

Chengyuan SU,Weiguang LI,Xingzhe LIU,Xiaofei HUANG,Xiaodan YU

《环境科学与工程前沿（英文）》 2016年 第10卷 第1期   页码 37-45 doi: 10.1007/s11783-014-0729-y

摘要： A study of the decolorization of reactive brilliant blue in an aqueous solution using Fe-Mn-sepiolite as a heterogeneous Fenton-like catalyst has been performed. The Fourier transform infrared (FTIR) spectra of the catalyst showed bending vibrations of the Fe-O. The X-ray diffraction (XRD) patterns of the catalyst showed characteristic diffraction peaks of α-Fe O , γ-Fe O and MnO. A four factor central composite design (CCD) coupled with response surface methodology (RSM) was applied to evaluate and optimize the important variables (catalyst addition, hydrogen peroxide dosage, initial pH value and initial dye concentration). When the reaction conditions were catalyst dosage= 0.4 g, [H O ]= 0.3 mL, pH= 2.5, [reactive brilliant blue] = 50 mg·L , and volume of solution= 500 mL at room temperature, the decolorization efficiency of reactive brilliant blue was 91.98% within 60 min. Moreover, the Fe-Mn-sepiolite catalyst had good stability for the degradation of reactive brilliant blue even after six cycles. Leaching of iron ions (<0.4 mg·L ) was observed. The decoloring process was reactive brilliant blue specific via a redox reaction. The benzene ring and naphthalene ring were first oxidized to open ring; these were then oxidized to the alcohol and carboxylic acid. The reactive brilliant blue was decomposed mainly by the attack of ·OH radicals including surface-bound ·OH radicals generated on the catalyst surface.

关键词： Fe-Mn-sepiolite catalyst     heterogeneous Fenton-like     reactive brilliant blue     homogeneous precipitation method     hydroxyl radical    

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标题 作者 时间 类型 操作

Capacity analysis for cognitive heterogeneous networks with ideal/non-ideal sensing

Tao HUANG, Ying-lei TENG, Meng-ting LIU, Jiang LIU

期刊论文

基于频谱​动态控制的异构蜂窝网络​安全高效传输方案

李晨曦, 关磊, 吴华清, 承楠, 李赞, 沈学民

期刊论文

基于最大比合并的认知无线电物理层保密性能分析

Hui ZHAO,Dan-yang WANG,Chao-qing TANG,Ya-ping LIU,Gao-feng PAN,Ting-ting LI,Yun-fei CHEN

期刊论文

认知无线网络中一种基于投影梯度的多用户功率控制方法

Yun-zheng TAO, Chun-yan WU, Yu-zhen HUANG, Ping ZHANG

期刊论文

面向潜在行为预测的异构行为网络嵌入学习

Yue-yang WANG, Wei-hao JIANG, Shi-liang PU, Yue-ting ZHUANG

期刊论文

Computational design of heterogeneous catalysts and gas separation materials for advanced chemical processing

Huaiwei Shi, Teng Zhou

期刊论文

Application of heterogeneous catalysis to biodiesel synthesis using microalgae oil

期刊论文

Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

期刊论文

Precursor-driven structural tailoring of iron oxychloride for enhanced heterogeneous Fenton activity

期刊论文

of herding behavior of tradable green certificate market players on market efficiency: Insights from heterogeneous

期刊论文

Using heterogeneous patent network features to rank and discover influential inventors

Yong-ping DU,Chang-qing YAO,Nan LI

期刊论文

Elastic analysis of heterogeneous thick-walled spherical pressure vessels with parabolic varying properties

Keyhan KARAMI, Majid ABEDI, Mohammad ZAMANI NEJAD, Mohammad Hassan LOTFIAN

期刊论文

基于Self-X认知制造网络实现认知大规模个性化定制——一种工业知识图谱及图嵌入技术使能的途径

李心雨, 郑湃, 鲍劲松, 高亮, 徐旬

期刊论文

Enhanced heterogeneous Fenton-like activity by Cu-doped BiFeO

Jie Mao, Xie Quan, Jing Wang, Cong Gao, Shuo Chen, Hongtao Yu, Yaobin Zhang

期刊论文

Fe-Mn-sepiolite as an effective heterogeneous Fenton-like catalyst for the decolorization of reactive

Chengyuan SU,Weiguang LI,Xingzhe LIU,Xiaofei HUANG,Xiaodan YU

期刊论文