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Image Smoothing Based on Image Decomposition and Sparse High Frequency Gradient

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Journal of Computer Science & Technology 2018年第3期33卷 502-510页

作者： Guang-Hao Ma ming-li zhang Xue-Mei li Cai-ming zhang School of Computer Science and Technology Shandong University Jinan 250101 China Shandong Co-Innovation Center of Future Intelligent Computing Yantai 264025 China School of Software Shandong University Jinan 250101 China Digital Media Research Institute Shandong University of Finance and Economics Jinan 250061 China

Image smoothing is a crucial image processing topic and has wide applications. For images with rich texture, most of the existing image smoothing methods are difficult to obtain significant texture removal performance because texture containing obvious edges and large gradient changes is easy to be preserved as the main edges. In this paper, we propose a novel framework （DSHFG） for image smoothing combined with the constraint of sparse high frequency gradient for texture images. First, we decompose the image into two components： a smooth component （constant component） and a non-smooth （high frequency） component. Second, we remove the non-smooth component containing high frequency gradient and smooth the other component combining with the constraint of sparse high frequency gradient. Experimental results demonstrate the proposed method is more competitive on efficiently texture removing than the state-of-the-art methods. What is more, our approach has a variety of applications including edge detection, detail magnification, image abstraction, and image composition.

关键词： image smoothing texture removal image decomposition

Optimal Design of Two Road Networks Based on their Properties

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Acta Mathematicae Applicatae Sinica 2007年第2期23卷 337-352页

作者： ming-zhe li Yan zhang Faculty of Economics Fukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan

In this paper, we discuss some fundamental properties of two idealized typical networks, namely, grid type and radial-circular type. The discussion is based on SPCP （Shortest Path Counting Problem）, which reflects the traffic density of a road segment. Furthermore, we compare their effectiveness based on the obtained results of the above two road networks, and suggest some proposals on the design of car lanes by considering the direction of a road segment in relation to these road networks.

关键词： SPCP DSPCP grid radial-circular optimal design of road networks

High throughput bandwidth optimized VLSI design for motion compensation in AVS HDTV decoder

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第6期9卷 822-832页

作者： Kai LUO Dong-xiao li ming zhang Department of lnformation Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

In this paper we present a motion compensation (MC) design for the newest Audio Video coding Standard (AVS) of China. Because of compression-efficient techniques of variable block size (VBS) and sub-pixel interpolation, intensive pixel calculation and huge memory access are required. We propose a parallel serial filtering mixed luma interpolation data flow and a three-stage multiplication free chroma interpolation scheme. Compared to the conventional designs, the integrated architecture supports about 2.7 times filtering throughput. The proposed MC design utilizes Vertical Z processing order for reference data re-use and saves up to 30% memory bandwidth. The whole design requires 44.3k gates when synthesized at 108 MHz clock frequency using 0.18-μm CMOS technology and can support up to 1920×1088@30 fps AVS HDTV video decoding.

关键词： Audio Video coding Standard (AVS) Motion compensation (MC) Interpolation VLSI Architecture

Genetic structure and historical demography of Malus sieversii in the Yili Valley and the western mountains of the Junggar Basin, Xinjiang, China

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Journal of Arid Land 2015年第2期7卷 264-271页

作者： Hong Xiang zhang ming li zhang li Na WANG Key Laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Institute of Botany Chinese Academy of Sciences Central China Normal University

Malus sieversii, a wild progenitor of domesticated apple, is distributed in western Xinjiang of China, eastern part of Kazakhstan and Kyrgyzstan in Central Asia. To well understand the genetic structure and the his- torical demography of this important germplasm resource, we sampled 15 populations with 110 individuals of Malus sieversii from the Yili Valley and the western mountains of the Junggar Basin, Xinjiang, and sequenced two nrDNA fragments for these 110 individuals. Meanwhile, we modeled and compared species distributions under the current and the Last Glacial Maximum climatic conditions. The results showed that populations of M. sieversfi from Xinjiang had low levels of genetic diversity and genetic differentiation. During the LGM period, populations of M. sieversfi had lost their northern distributions in the western mountains of the Junggar Basin. M. sieversfi has ex- perienced a demographic expansion from the south of the Yili Valley to the north of the western mountains of the Junggar Basin during the warm interglacial epochs. Due to the high sensibility of M. sieversii to disturbance, we proposed more attention should be paid to the M. sieversfi populations in the western mountains of the Junggar Basin.

关键词： Malus sieversii phylogeography LEAFY gene intron 1 species distribution modeling genetic diversity

Calibrate complex fracture model for subsurface flow based on Bayesian formulation

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Petroleum Science 2019年第5期16卷 1105-1120页

作者： li-ming zhang Ji Qi Kai zhang li-Xin li Xiao-ming zhang Hai-Yang Wu Miguel Tome Chipecane Jun Yao School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina PetroChina Richfi t Information Technology Co. LtdBeijing 100000China University Technology Petronas(Tronoh-Perak-Malaysia)in Petroleum Engineering Seri IskandarMalaysia

In practical development of unconventional reservoirs,fracture networks are a highly conductive transport media for subsurface fluid ***,it is crucial to clearly determine the fracture properties used in production ***,it is different to calibrate the properties of fracture networks because it is an inverse problem with multi-patterns and highcomplexity of fracture distribution and inherent defect of multiplicity of *** this paper,in order to solve the problem,the complex fracture model is divided into two sub-systems,namely"Pattern A"and"Pattern B."In addition,the generation method is grouped into two ***,we construct each sub-system based on the probability density function of the fracture ***,we recombine the sub-systems into an integral complex fracture *** on the generation mechanism,the estimation of the complex fracture from dynamic performance and observation data can be solved as an inverse *** this study,the Bayesian formulation is used to quantify the uncertainty of fracture *** minimize observation data misfit immediately as it occurs,we optimize the updated properties by a simultaneous perturbation stochastic algorithm which requires only two measurements of the loss *** numerical experiments,we firstly visualize that small-scale fractures significantly contribute to the flow ***,we demonstrate the suitability and effectiveness of the Bayesian formulation for calibrating the complex fracture model in the following simulation.

关键词： Complex fracture system Inverse progress Bayesian inverse Model calibration

Separation of contact stress components by moire interferometry

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Acta Mechanica Sinica 2007年第6期23卷 707-711页

作者： ming li Jue zhang Chong Wu Jing Fang College of Engineering Peking University Beijing 100871 China

A hybrid technique of combining moire measurement and analytical solution is developed to separate the normal and the tangential components of distributed contact stresses between two co-plane bodies. The moire interfe-rometry offers the displacement fields near the deformed contact zone, from which the tangential strains and boundary slopes of the deformed configurations can be evaluated. Those experimental results provide boundary conditions for the discrete integration of Flamant＇s solutions, to inversely compute the separated components of the contact stresses.

关键词： Moire patterns Contact deformation Experimental/analytical hybrid solution

Thermal Characterization and Decomposition Kinetics of Free Anthraquinones from Rhubarb

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Chinese Chemical Letters 2006年第5期17卷 699-702页

作者： li ming zhang Xia li Yu Jie DAI College of Bioengineering Tianjin University of Science ＆ Technology Tianjin 300222

The thermal behaviour of aloe-emodin, chrysophanol and physcion and their kinetics have been investigated under non-isothermal conditions by means of differential thermal analysis （DTA） and thermogravimetry （TG）. The thermal characteristics have been determined using the DTA and TG-DTG curves. The non-isothermal kinetic data were analyzed by means of the Achar method and the Madhusudanan-Krishnan-Ninan （MKN） method. The possible reaction mechanisms have been investigated by comparing the kinetic parameters. The kinetic equation for aloe-emodin, chrysophanol and physcion can be expressed as dα/dt=Aexp（-E/RT）1/3（1-α）[-In（1-α]2. The activation energy E （kJ mol^-1） of the three free anthraquinones are 78.09, 89.54, and 107.5 and their InA/s^-1 are 22.98, 36.85 and 43.60, respectively.

关键词： Aloe-emodin chrysophanol physcion thermogravimetry (TG) differential thermoanalysis (DTA) non-isothermal kinetics.

Translocator protein ligand, YL-IPA08, attenuates lipopolysaccharide-induced depression-like behavior by promoting neural regeneration

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Neural Regeneration Research 2018年第11期13卷 1937-1944页

作者： Xiao-Ying zhang li-ming zhang Wei-Dong Mi Yun-Feng li Anesthesia and Operation Center Chinese PLA General Hospital Beijing China State Key Laboratory of Toxicology and Medical Countermeasures Beijing China

Translocator protein has received attention for its involvement in the pathogenesis of depression. This study assessed the effects of the new translocator protein ligand, YL-IPA08, on alleviating inflammation-induced depression-like behavior in mice and investigated its mechanism of action. Mice were intracerebroventricularly injected with 1, 10, 100 or 1000 ng lipopolysaccharide. The tail-suspension test and the forced swimming test confirmed that 100 ng lipopolysaccharide induced depression-like behavior. A mouse model was then established by intraventricular injection of 100 ng lipopolysaccharide. On days 16-24 after model establishment, mice were intragastrically administered 3 mg/kg YL-IPA08 daily. Immunohistochemistry was used to determine BrdU and NeuN expression in the hippocampus. YL-IPA08 effectively reversed the depression-like behavior of lipopolysaccharide-treated mice, restored body mass, increased the number of BrdU-positive cells, and the number and proportion of BrdU and NeuN double-positive cells. These findings indicate that YL-IPA08 can attenuate lipopolysaccharide-induced depression-like behavior in mice by promoting the formation of hippocampal neurons.

关键词： nerve regeneration YL-IPA08 hippocampus dentate gyrus lipopolysaccharide neuroinflammation depression translocator protein neural regeneration

Characteristic analysis of a Smith–Purcell terahertz source

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Photonics Research 2016年第5期4卷 162-167页

作者： Xian-Zhu Meng ming-Hong Wang li-ming zhang Zhong-Min Ren Shandong Provincial Key Laboratory of Optical Communication Science and Technology School of Physics Science and Information Engineering Liaocheng University

We investigate a novel Smith–Purcell terahertz source. This device is composed of an electron gun, a cylindrical resonator, a metallic grating, and a collector. The characteristics of the Smith–Purcell terahertz source are discussed with the help of three-dimensional particle-in-cell simulation. In this device, coherent and high-power Smith–Purcell radiation(SPR) at the terahertz frequency range can be produced for the reasonable parameters of charge energy and grating. Our results indicate that coherent SPR at 506.529 GHz with a power around 1000 W can be obtained for a grating of period l=0.3 mm operating at the beam energy E=50 keV and beam current I=10 A.

关键词： cell THz Purcell terahertz source Characteristic analysis of a Smith