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| 1 | A refined coherent point drift(CPD)algorithm for point set registration显示文摘The coherent point drift (CPD) algorithm is a powerful approach for point set registration. However, it suffers from a serious problem-there is a weight parameter w that reflects the assumption about the amount of noise and number of outliers in the Gaussian mixture model, and its value has an influence on the point set registration performance In the original CPD algorithm, the value of w is set manually, and hence an improper value will lead to poor registration results. To solve this problem, a fully automatic algorithm for the selection of an optimal weight parameter is proposed using a hybrid optimization scheme that combines the genetic algorithm with the Nelder-Mead simplex method. The experiments show that the refined CPD algorithm is more effective and extends the original CPD algorithm in its methodology and applications. | WANG Peng WANG Ping QU ZhiGuo GAO YingHui SHEN ZhenKang | 2011 | Science China(Information Sciences)2011，54，12： | 9 |
| 2 | Multilevel Pattern Mining Architecture for Automatic Network Monitoring in Heterogeneous Wireless Communication Networks显示文摘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. | Zhiguo Qu John Keeney Sebastian Robitzsch Faisal Zaman Xiaojun Wang | 2016 | China Communications2016，13，7： | 7 |
| 3 | Implementation of an efficient segregated algorithm-IDEAL on 3D collocated grid system显示文摘The segregated algorithm-IDEAL (inner doubly-iterative efficient algorithm for linked-equations) is an efficient and stable algorithm. In this algorithm, there exist inner doubly-iterative processes for pres-sure equation, which almost completely overcome two approximations in SIMPLE algorithm. Thus the coupling between velocity and pressure is fully guaranteed, greatly enhancing the convergence rate and stability of iteration process. In this paper, implementation of the IDEAL algorithm on a 3D collo-cated grid system is conducted. The interface velocity is calculated by the modified momentum inter-polation method (MMIM), by which the converged result is independent of the under-relaxation factor. Finally, five three-dimensional incompressible fluid flow and heat transfer problems are provided to compare the convergence rate and robustness between the IDEAL and three other most widely-used algorithms (SIMPLER, SIMPLEC and PISO). By the comparison it can be concluded that the IDEAL al-gorithm is more robust and efficient than the three other algorithms. | SUN DongLiang QU ZhiGuo HE YaLing Tao WenQuan | 2009 | Chinese Science Bulletin2009，54，6： | 5 |
| 4 | Reactive mesoporous silica nanoparticles loaded with limonene for improving physical and mental health of mice at simulated microgravity condition显示文摘Astronauts are under high stress for a long time because of the microgravity condition,which leads to anxiety,affects their learning and memory abilities,and seriously impairs the health of astronauts.Aromatherapy can improve the physical and mental health of astronauts in a way that moisturizes them softly and silently.However,the strong volatility of fragrances and inconvenience of aroma treatment greatly limit their application in the field of spaceflight.In this study,reactive mesoporous silica nanoparticles were prepared to encapsulate and slowly release limonene.The limonene loaded nanoparticles were named limonene@mesoporous silica nanoparticles-cyanuric chloride(LE@MSNs-CYC).LE@MSNs-CYC were then applied to wallpaper to improve the convenience of aromatherapy.LE@MSNs-CYC could chemically react with the wallpaper,thus firmly adsorbed on the wallpaper.In the following,the mice were treated with hindlimb unloading(HU)to simulate a microgravity environment.The results showed that 28-day HU led to an increase in the level of anxiety and declines in learning,memory,and physical health in mice.LE@MSNs-CYC showed significant relief effects on anxiety,learning,memory,and physical health of HU treated mice.Subsequently,the molecular mechanisms were explored by hypothalamic-pituitary-adrenal axis related hormones,immune-related cytokines,learning,and memory-related neurotransmitters and proteins. | Zhiguo Lu Jianze Wang Lina Qu Guanghan Kan Tianlu Zhang Jie Shen Yan Li Jun Yang Yunwei Niu Zuobing Xiao Yinghui Li Xin Zhang | 2020 | Bioactive Materials2020，5，4： | 5 |
| 5 | Review of Molecular Simulation Method for Gas Adsorption/desorption and Diffusion in Shale Matrix显示文摘Shale gas is becoming an increasingly promising alternative energy resource because of its high efficiency and environment-friendly characteristic. The amount of adsorbed gas on the shale matrix surfaces and dissolved gas in the shale matrix bulk is the dominant factor in the long-term productivity of shale reservoir. Although experimental measurements have been extensively carried out to investigate the gas adsorption and diffusion properties in the shale matrix, they cannot provide the detailed information on the microscopic transport mechanism of shale gas during the gas production process. Molecular simulation can accurately visualize the gas adsorption/desorption and diffusion processes in the shale matrix. In the present study, the recent research advances of molecular simulation on gas adsorption/desorption and diffusion in the shale matrix are reviewed. Firstly, the density functional theory(DFT) for shale gas molecule desorption/adsorption on the surface of the matrix crystal is illustrated. Then, the grand canonical Monte Carlo(GCMC) method predicting the amount of shale gas desorption/adsorption in the shale matrix crystal is introduced. Finally, molecular dynamics simulation(MD) for gas diffusion in the shale matrix is elucidated. Further developments of the molecular simulation method in shale gas production are also discussed. | WANG Hui QU Zhiguo YIN Ying BAI Junqiang YU Bo | 2019 | Journal of Thermal Science2019，28，1： | 4 |
| 6 | Novel Zero-Watermarking Scheme Based on DWT-DCT显示文摘Essential characteristics for watermark registration and detection without data modification can be used in anaudio zero-watermarking scheme.In this paper,a novel audio zero-watermarking scheme based on discrete wavelet transform(DWT) and discrete cosine transform(DCT) is presented.Thewatermark is registered by comparing the mean absolute values of the adjacent frame coefficients after DWT and DCT.Simulation results show that the proposed scheme is stronglyrobusttocommon attacks such as AWGN,downsampling,low-pass filtering,requantization,and MP3 compression.A performance analysis of the proposed scheme shows that all bit error rates after attacks are zero. | Yu Yang Min Lei Xiaoming Liu Zhiguo Qu Cheng Wang | 2016 | China Communications2016，13，7： | 3 |
| 7 | Contour detection improved by frequency domain filtering of gradient image显示文摘We propose an intermediate computational step,frequency domain filtering of gradient image,to improve contour detection performance of gradient-based edge detectors.This step is inspired by analyzing the spectrum distribution of object contours and texture edges in the frequency domain of gradient image.We illustrate the principle and efect of this step by adding it to the Canny edge detector.The resulting operator can selectively retain object contours and region boundaries,and meanwhile can dramatically reduce non-meaningful elements caused by textured background.We use several types of images to compare the proposed method and other related methods qualitatively and quantitatively.Experimental results show that the proposed method can efectively enhance the contour detection of Canny edge detector and achieves similar detection performance to two other related methods but runs faster. | QU ZhiGuo GAO YingHui WANG Ping WANG Peng TAN XianSi SHEN ZhenKang | 2014 | Science China(Information Sciences)2014，57，1： | 2 |
| 8 | Chronological Video Synopsis via Events Rearrangement Optimization显示文摘Video synopsis aims at retrieving interested events and reducing human labor on browsing long surveillance video. Traditional video synopsis methods based on energy function minimization is high computational and time consuming. Besides, the unchronological tubes shifting strategy may cause chaotic temporality and uncomfortable collisions. We propose a spatiotemporal events rearrangement optimization algorithm,which formulates the events rearrangement problem as iteration judgment on trajectory correlation and events compactability to generate the output synopsis video. An events subsection modification strategy has been presented to solve the spatial incompleteness of certain single event caused by imperfect object tracking. The experimental results have shown that the output synopsis video reserves the chronological order and avoids collisions of events. | HE Yi HAN Jun SANG Nong QU Zhiguo GAO Changxin | 2018 | Chinese Journal of Electronics2018，27，2： | 2 |
| 9 | QoE Assessment and Prediction Method for HighDefinition Video Stream Using Image Damage Accumulation显示文摘The accuracy of the traditional assessment method of the quality of experience(Qo E) has been facing challenges with the growth of high-definition(HD) video streaming services.Image display-quality damage is the main factor that affects the Qo E in HD video services through UDP network transmission.In this paper,we introduce a novel objective factor known as image damage accumulation(IDA) to assess user's Qo E in HD video services.First,this paper quantitatively analyzed the effect on user quality of experience by IDA and established a mapping relationship between mean opinion scores and IDA.Furthermore,the probability of image damage caused by compression and transmission were analyzed.Based on this analysis,an objective Qo E assessment and prediction method for HD video stream service that evaluated the user experience according to IDA are proposed.The proposed method can achieve assessment and prediction accuracy on three distinct subjective tests. | Yang Geng Luoming Meng Yao Wang Yu Yang Zhiguo Qu | 2016 | China Communications2016，13，7： | 2 |
| 10 | Thermal performance analysis of intermediate fluid vaporizer for liquefied natural gas显示文摘 | Liang Pu Zhiguo Qu Yuheng Bai Di Qi Kun Song Peng Yi | 2014 | Applied Thermal Engineering2014，，： | 2 |
| 11 | Three-dimensional numerical simulation on laminar heat transfer and fluid flow characteristics of strip fin surface with X-arrangement显示文摘 | Qu Zhiguo Tao Wenquan He Yaling | 2004 | ASME J Heat Transfer2004，126，5： | 1 |
| 12 | Numerical study on performance of molten salt phase change thermal energy storage system with enhanced tubes 显示文摘 | Tao Yubing He Yaling Qu Zhiguo | 2012 | Solar Energy2012，86，5： | 1 |
| 13 | Acoarse-to-fine matching algorithm for FLIR and opticalsatellite image registration显示文摘 | WANG Peng QU Zhiguo WANG Ping | 2011 | IEEE Geoscience andRemote Sensing Letters2011，9，4： | 1 |
| 14 | Quantum steganography with large payload based on entanglement swapping of X-type entangled states 显示文摘 | Qu Zhiguo CREN Xiubo Luo Mingxing NIu Xinxin YANG Yixian | 2011 | Optics Communications2011，284，： | 1 |
| 15 | Export of dissolved carbonaceous and nitrogenous substances in rivers of the “Water Tower of Asia”显示文摘Rivers are critical links in the carbon and nitrogen cycle in aquatic,terrestrial,and atmospheric environments.Here riverine carbon and nitrogen exports in nine large rivers on the Tibetan Plateau—the'Water Tower of Asia'—were investigated in the monsoon season from 2013 to 2015.Compared with the world average,concentrations of dissolved inorganic carbon(DIC,30.7 mg/L)were high in river basins of the plateau due to extensive topographic relief and intensive water erosion.Low concentrations of dissolved organic carbon(DOC,1.16 mg/L)were likely due to the low temperature and unproductive land vegetation environments.Average concentrations of riverine DIN(0.32 mg/L)and DON(0.35 mg/L)on the Tibetan Plateau were close to the world average.However,despite its predominantly pristine environment,discharge from agricultural activities and urban areas of the plateau has raised riverine N export.In addition,DOC/DON ratio(C/N,~6.5)in rivers of the Tibetan Plateau was much lower than the global average,indicating that dissolved organic carbon in the rivers of this region might be more bioavailable.Therefore,along with global warming and anthropogenic activities,increasing export of bioavailable riverine carbon and nitrogen from rivers of the Tibetan Plateau can be expected in the future,which will possibly influence the regional carbon and nitrogen cycle. | Bin Qu Mika Sillanpaa Shichang Kang Fangping Yan Zhiguo Li Hongbo Zhang Chaoliu Li | 2018 | Journal of Environmental Sciences2018，30，3： | 1 |
| 16 | An Effi- cient Segregated Algorithm for Incompressible Fluid Flow and Heat Transfer Problems--IDEAL (Inner Doubly It- erative Efficient Algorithm for Linked Equations) Part I: Mathematical Formulation and Solution Procedure 显示文摘 | SUN Dongliang QU Zhiguo HE Yaling | 2008 | Numerical Heat Transfer Part B: Fundamentals2008，53，1： | 1 |
| 17 | A Novel Segre- gated Algorithm for Incompressible Fluid Flow and Heat Transfer Problems--Clear (Coupled and Linked Equa- tions Algorithm Revised) Part I: Mathematical Formula- tion and Solution Procedure 显示文摘 | TAO Wenquan QU Zhiguo HE Yaling | 2004 | Numerical Heat Transfer Part B: Fundamdamentals2004，45，1： | 1 |
| 18 | Premixed Combustion in a Porous Burner with different fuels显示文摘 | Zhiguo Qu Huaibin Gao Xiangbo Feng | 2015 | Combustion science and technology2015，187，3： | 1 |
| 19 | Numerical study on performance of molten salt phase change thermal energy storage system with enhanced tubes显示文摘 | Tao Yubing He Yaling Qu Zhiguo | 2012 | Solar Energy2012，86，5： | 1 |
| 20 | Identifying the dominant transport mechanism in single nanoscale pores and 3D nanoporous media显示文摘Gas transport mechanisms can be categorized into viscous flow and mass diffusion,both of which may coexist in a porous media with multiscale pore sizes.To determine the dominant transport mechanism and its contribution to gas transport capacity,the gas viscous flow and mass diffusion processes are analyzed in single nanoscale pores via a theoretical method,and are simulated in 3D nanoporous media via pore-scale lattice Boltzmann methods.The apparent permeability from the viscous flow and apparent diffusivity from the mass diffusion are estimated.A dimensionless parameter,i.e.,the diffusion-flow ratio,is proposed to evaluate the dominant transport mechanism,which is a function of the apparent permeability,apparent diffusivity,bulk dynamic viscosity,and working pressure.The results show that the apparent permeability increases by approximately two orders of magnitude when the average Knudsen number(Kn_(avg))of the nanoporous media or Knudsen number(Kn)of single nanoscale pores increases from 0.1 to 10.Under the same conditions,the increment in the apparent diffusivity is only approximately one order of magnitude.When Kn<0.01,the apparent permeability has a lower bound(i.e.,absolute permeability).When Kn>10,the apparent diffusivity has an upper bound(i.e.,Knudsen diffusivity).The dominant transport mechanism in single nanoscale pores is the viscous flow for 0.01 | Ying Yin Zhiguo Qu Masa Prodanovic Christopher J.Landry | 2023 | Fundamental Research2023，3，3： | 1 |
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