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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

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 1,   Pages 1-11 doi: 10.1631/FITEE.1400129

Abstract: 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.

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

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Insurance ratemaking method for risk of construction diversion project

Chen Zhiding,Hu Zhigen

Strategic Study of CAE 2011, Volume 13, Issue 4,   Pages 106-112

Abstract: And then, the standpoint that these total losses are subject to non homogeneous compound Poisson process

Keywords： diversion risk     engineering insurance     insurance premium     non-homogeneous compound Poisson process    

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Coverage performance of the multilayer UAV-terrestrial HetNet with CoMP transmission scheme Research Article

Weihao WANG, Yifan JIANG, Zesong FEI, Jing GUO,weihaowang@bit.edu.cn,jiangyifan@bit.edu.cn,feizesong@bit.edu.cn,jingguo@bit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 1,   Pages 61-72 doi: 10.1631/FITEE.2100310

Abstract: To support the ubiquitous connectivity requirement of sixth generation communication, s (UAVs) play a key role as a major part of the future communication networks. One major issue in UAV communications is the interference resulting from spectrum sharing and line-of-sight links. Recently, the application of the technology has been proposed to reduce the interference in the UAV-terrestrial heterogeneous network (HetNet). In this paper, we consider a three-dimensional (3D) multilayer UAV-terrestrial HetNet, where the aerial base stations (ABSs) are deployed at multiple different altitudes. Using stochastic geometry, we develop a tractable mathematical framework to characterize the aggregate interference and evaluate the coverage probability of this HetNet. Our numerical results show that the implementation of the CoMP scheme can effectively reduce the interference in the network, especially when the density of base stations is relatively large. Furthermore, the system parameters of the ABSs deployed at higher altitudes dominantly influence the of the considered 3D HetNet.

Keywords： Unmanned aerial vehicle     Poisson point process     Coordinated multipoint (CoMP)     Statistics of interference    

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Preparation and microstructure analysis of Fe-doped PbTiO ceramic

QIANG Liangsheng, MA Jing, CHU Jia, ZHANG Xiaohong

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 140-144 doi: 10.1007/s11705-008-0021-4

Abstract: powder and bulk materials were prepared successfully by sol-gel technique and a subsequent sintering processFurthermore, from STM analysis, it could be seen that the grain size of doped PT ceramics was homogeneous

Keywords： homogeneous     Thermogravimetry/differential thermal     tightness     oxygenolysis     sintering process    

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Effect of a less permeable stronger soil layer on the stability of non-homogeneous unsaturated slopes

Nabarun DEY, Aniruddha SENGUPTA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1462-1475 doi: 10.1007/s11709-020-0674-8

Abstract: It is observed that a less permeable, stronger silty sand layer in an otherwise homogeneous sandy soilNo shear band is found to initiate in a homogeneous sandy soil slope, whereas for a non-homogeneous slopeA discontinuity of the shear zone is also observed for the case of a non-homogeneous soil slope.The factor of safety of a non-homogeneous, unsaturated soil slope decreases because of the less permeable

Keywords： non-homogeneous slope     stronger soil layer     factor of safety     centrifuge model test     unsaturated soils    

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Control of homogeneous charge compression ignition combustion in a two-cylinder gasoline direct injection

WANG Zhi, WANG Jianxin, SHUAI Shijin, MA Qingjun, TIAN Guohong

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 311-315 doi: 10.1007/s11708-007-0045-3

Abstract: Homogeneous charge compression ignition (HCCI) has challenges in ignition timing control, combustion

Keywords： Homogeneous     control     combustion     consumption     extension    

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Anaerobic treatment of wastewater containing methanol in up-flow anaerobic sludge bed (UASB) reactor

LIN Yishan, HE Yanling, MENG Zhuo, YANG Shucheng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 241-246 doi: 10.1007/s11783-008-0040-x

Abstract: The direct conversion of methanol into methane is the main process in anaerobic treatment of methanolmethanol theoretically, which may probably result in an abrupt pH drop and deteriorate the anaerobic processThe microorganisms in the sludge at the end of the test became homogeneous in morphology, which were

Keywords： homogeneous     spherical     influent alkalinity     process     anaerobic treatment    

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Liquid discharge plasma for fast biomass liquefaction at mild conditions: The effects of homogeneous

Sen Wang, Shiyun Liu, Danhua Mei, Rusen Zhou, Congcong Jiang, Xianhui Zhang, Zhi Fang, Kostya (Ken) Ostrikov

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 763-771 doi: 10.1007/s11705-019-1896-y

Abstract: Different homogeneous catalysts are usually required for plasma-enabled biomass liquefaction to achieveHowever, the effects of such catalysts on the plasma-assisted liquefaction process and of the plasmathe liquefaction yield were examined; further, the roles of the catalysts in the plasma liquefaction processspecies; these effects directly contributed to a higher efficacy of the plasma-enabled liquefaction process

Keywords： discharge plasma     biomass liquefaction     catalyst     homogeneous catalysts    

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Effects of compression ratio on the combustion characteristics of a homogeneous charge compression ignition

SONG Ruizhi, ZHOU Longbao, LIU Shenghua, LI Wei, HU Tiegang

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 463-467 doi: 10.1007/s11708-007-0068-0

Abstract: The effects of homogeneous charge compression ignition (HCCI) engine compression ratio on its combustion

Keywords： homogeneous     cylinder     combustion     compression     dimethyl    

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Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG, Yanyu WEI, Yonghong LI

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 170-176 doi: 10.1007/s11705-013-1322-9

Abstract: A high-performance Ni/ZnO adsorbent was prepared by homogeneous precipitation using urea hydrolysis and

Keywords： nickel     reactive adsorption     desulfurization     thiophene    

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Research on Characteristic of Double Glow Discharge Plasma Surface Alloying Process

Gao Yuan,Xu Jinyong,Gao Qing,An Jinping,Xu Zhong

Strategic Study of CAE 2008, Volume 10, Issue 2,   Pages 26-30

Abstract:

The principle, Discharge mode, alloying process and research works ofdouble glow discharge plasma surface allloying process are introduced particularly in the paper.The technology is fit for high melting point metal surface alloying and surface alloying in surface ofhigh melting point metal and some coloured metal.

Keywords： double glow discharge plasma surface alloying process     high melting point metal     hollow cathode effect    

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Design, Characterization, and 3D Printing of Cardiovascular Stents with Zero Poisson’s Ratio in Longitudinal Article

Chengjin Wang, Lei Zhang, Yongcong Fang, Wei Sun

Engineering 2021, Volume 7, Issue 7,   Pages 979-990 doi: 10.1016/j.eng.2020.02.013

Abstract: A stent with a zero Poisson’s ratio (ZPR) structure is designed, and a preliminary monofilament

Keywords： Additive manufacturing     3D printing     Screw extrusion     Cardiovascular stent     Zero Poisson’s ratio    

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Two-sided ultrasonic surface rolling process of aeroengine blades based on on-machine noncontact measurement

Shulei YAO, Xian CAO, Shuang LIU, Kaiming ZHANG, Xiancheng ZHANG, Congyang GONG, Chengcheng ZHANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 240-255 doi: 10.1007/s11465-019-0581-7

Abstract: The ultrasonic surface rolling process (USRP) is a novel surface treatment technique that can highlySecond, a 3D scanning system is used to obtain the point cloud of the blade, and a series of point cloudA local point cloud automatic extraction algorithm is introduced to extract the point cloud of the strengthenedThen, the tool path is designed on the basis of the extracted point cloud.

Keywords： aeroengine blades     on-machine noncontact measurement     point cloud processing     path planning     surface strengthening    

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STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 503-509 doi: 10.15302/J-FASE-2023528

Abstract:

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Keywords： GREEN     AGRICULTURAL     PROMOTE     POLLUTION     SOURCE     DEVELOPMENT     POINT     STRENGTHENING     CONTROL    

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Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point

M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 23-28 doi: 10.1007/s11465-012-0304-9

Abstract:

This paper presents an optimal control strategy for optimal trajectory planning of mobile robots by considering nonlinear dynamic model and nonholonomic constraints of the system. The nonholonomic constraints of the system are introduced by a nonintegrable set of differential equations which represent kinematic restriction on the motion. The Lagrange’s principle is employed to derive the nonlinear equations of the system. Then, the optimal path planning of the mobile robot is formulated as an optimal control problem. To set up the problem, the nonlinear equations of the system are assumed as constraints, and a minimum energy objective function is defined. To solve the problem, an indirect solution of the optimal control method is employed, and conditions of the optimality derived as a set of coupled nonlinear differential equations. The optimality equations are solved numerically, and various simulations are performed for a nonholonomic mobile robot to illustrate effectiveness of the proposed method.

Keywords： mobile robot     trajectory planning     nonlinear dynamic     optimal control    

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Title Author Date Type Operation

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

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

Journal Article

Insurance ratemaking method for risk of construction diversion project

Chen Zhiding,Hu Zhigen

Journal Article

Coverage performance of the multilayer UAV-terrestrial HetNet with CoMP transmission scheme

Weihao WANG, Yifan JIANG, Zesong FEI, Jing GUO,weihaowang@bit.edu.cn,jiangyifan@bit.edu.cn,feizesong@bit.edu.cn,jingguo@bit.edu.cn

Journal Article

Preparation and microstructure analysis of Fe-doped PbTiO ceramic

QIANG Liangsheng, MA Jing, CHU Jia, ZHANG Xiaohong

Journal Article

Effect of a less permeable stronger soil layer on the stability of non-homogeneous unsaturated slopes

Nabarun DEY, Aniruddha SENGUPTA

Journal Article

Control of homogeneous charge compression ignition combustion in a two-cylinder gasoline direct injection

WANG Zhi, WANG Jianxin, SHUAI Shijin, MA Qingjun, TIAN Guohong

Journal Article

Anaerobic treatment of wastewater containing methanol in up-flow anaerobic sludge bed (UASB) reactor

LIN Yishan, HE Yanling, MENG Zhuo, YANG Shucheng

Journal Article

Liquid discharge plasma for fast biomass liquefaction at mild conditions: The effects of homogeneous

Sen Wang, Shiyun Liu, Danhua Mei, Rusen Zhou, Congcong Jiang, Xianhui Zhang, Zhi Fang, Kostya (Ken) Ostrikov

Journal Article

Effects of compression ratio on the combustion characteristics of a homogeneous charge compression ignition

SONG Ruizhi, ZHOU Longbao, LIU Shenghua, LI Wei, HU Tiegang

Journal Article

Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG, Yanyu WEI, Yonghong LI

Journal Article

Research on Characteristic of Double Glow Discharge Plasma Surface Alloying Process

Gao Yuan,Xu Jinyong,Gao Qing,An Jinping,Xu Zhong

Journal Article

Design, Characterization, and 3D Printing of Cardiovascular Stents with Zero Poisson’s Ratio in Longitudinal

Chengjin Wang, Lei Zhang, Yongcong Fang, Wei Sun

Journal Article

Two-sided ultrasonic surface rolling process of aeroengine blades based on on-machine noncontact measurement

Shulei YAO, Xian CAO, Shuang LIU, Kaiming ZHANG, Xiancheng ZHANG, Congyang GONG, Chengcheng ZHANG

Journal Article

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Journal Article

Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point

M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Journal Article