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| 1 | Non-coordination in China′s Urbanization: Assessment and Affecting Factors显示文摘Urbanization is a comprehensive concept,a trinity process that is based on the interactions and mutual influences among the population urbanization,economic urbanization and space urbanization,in which,people are the central and leading players in this process,while economic activities serve as the driving force and space is the carrier—the physical or material setting as well as the product.So the coordination among these processes is crucial for a country or region′s sustainable development.China is experiencing rapid growth of cities and a surge in urban population,with the basic national condition of many people and little land,which calls for a systematic study of the issue of coordinated urbanization from theoretical,methodological and practical perspectives.Based on the concept of urbanization and non-coordination of urbanization,this article built a quantitative method to identify and evaluate the urbanization and non-coordination of urbanization,and made an empirical analysis in China between 2000 and 2008.The results show that the non-coordination overall level of China′s urbanization declined during the study period,because population urbanization,economic urbanization,and space urbanization exhibited different trajectories of change.This study also reveals that performance assessment system,household registration system,and urban land expropriation system,etc.,are the main affecting factors.At the end,we put forward some suggestions to achieve sustainable development of China′s urbanization from the aspects of improving the local government′s objective function,implementing the urban planning system,enforcing public participation aspects and so on. | SUN Pingjun SONG Wei XIU Chunliang LIANG Zhenming | 2013 | Chinese Geographical Science2013，23，6： | 26 |
| 2 | A noise removal algorithm for DR Images based on adaptive estimation of threshold显示文摘When DR (Digital Radiography) images are filtered, it is necessary to preserve the edges and key details. But the existing methods may inevitably take fine details mistaken for noise to remove. In order to solve the problem an improved anisotropic diffusion filtering model is proposed. Firstly, a novel diffusion function is introduced based on Perona and Malik model, which well overcomes the high rate of convergence. Secondly, the gradient threshold is modified to an adaptive estimation function, so it is better at adaptive threshold regulations according to the pixels and iteration times. Finally, the edges are extracted from the restored images and the results are evaluated quantificationally. It is shown from the experiments that the proposed method is effective not only in noise reduction but also in details preserved. | XIONG Bangshu JIA Bei YU Lei ZHAO Pingjun | 2012 | Computer Aided Drafting,Design and Manufacturing2012，22，4： | 5 |
| 3 | Anisotropic thermoelectric properties of layered compound SnSe2显示文摘Similar to high performance SnSe thermoelectrics, SnSe2 is also a layered structured semiconductor.However, its anisotropic thermoelectric properties are less experimentally investigated. In this work,Cl-doped SnSe2 bulk materials are successfully prepared, and their thermal stability and anisotropic transport properties are systematically studied. Unexpectedly, different from the theoretical prediction and other typical layered thermoelectric compounds like Bi_2Te_3, the out-of-plane zT_c value is higher than in-plane zT_a for the same composition. The zT value is significantly enhanced by Cl doping. A maximum zT_c of ~0.4 at 673 K is achieved in SnSe_(1.88)Cl_(0.12), twice higher than previously reported Cl-doped SnSe_2 synthesized by the solvothermal method. | Peipei Xu Tiezheng Fu Jiazhan Xin Yintu Liu Pingjun Ying Xinbing Zhao Hongge Pan Tiejun Zhu | 2017 | Science Bulletin2017，62，24： | 4 |
| 4 | Spatial-temporal Evolution of the Urban-rural Coordination Relationship in Northeast China in 1990-2018显示文摘To comprehensively understand the law of urban-rural relationship and propose scientific measures of urban-rural coordinated development in Northeast China,this study uses the coupling coordination degree model and geographically and temporally weighted regression(GTWR)model to analyze the spatial-temporal patterns and the corresponding driving mechanisms of its urban-rural coordination since 1990.The results are as follows.First,the urban-rural coupling coordination degree in Northeast China was very low and improved slowly,but its stages of evolution is a good interpretation of the strategic arrangements of China's urbanization.Second,the urban-rural coupling coordination degree in Northeast China had spatial differences and was characterized by central polarization,converging on urban agglomeration,which was high in the south and low in the north.Moreover,the gap between the north and south weakened.Third,the spatial-temporal evolution of the urban-rural coordination relationship in Northeast China was influenced by pulling from the central cities,pushing from rural transformation,and government regulations.The influence intensity of the three mechanisms was weak,but the pulling from the central cities was stronger than that of the other two mechanisms.Furthermore,the spatial difference between the three mechanisms determines the spatial pattern and its evolution of the urban-rural coordination relationship in Northeast China.Fourth,to promote the development of urban-rural coordination in Northeast China,it is essential to advance urban-rural economic correlation,enhance the government^role in regulating and guiding,and adopt different policies for each region in Northeast China. | WANG Ying CHEN Xiaohong SUN Pingjun LIU Hang HE Jiaxin | 2021 | Chinese Geographical Science2021，31，3： | 4 |
| 5 | Super-plasticity of Zr_(64.80)Cu_(14.85)Ni_(10.35)Al_(10) bulk metallic glass at room temperature显示文摘Generally,bulk metallic glasses(BMGs)exhibit a very limited plastic deformation under a compression load at room temperature,often less than 2% before fracturing.In this letter,through an appropriate choice of BMGs' composition,an amorphous rod of Zr64.80Cu14.85Ni10.35Al10 with a diameter of 2 mm was prepared by using copper mold suction casting.X-ray diffraction and differential scanning calorimetry were utilized to determine its structure and thermal stability,and the uniaxial compression test was adopted to study its plastic deformation behavior at room temperature simultaneously.The results showed that the glass transition temperature and onset temperature of the exothermic reaction of the amorphous rod were 646 and 750 K,respectively,and its micro-hardness was 594.7 Hv.During com-pression,when the engineering strain and engineering stress arrived at 9.05% and 1732 MPa,respec-tively,i.e.,the true strain and true stress reached 9.42% and 1560 MPa,respectively,the amorphous rod started to yield.After yielding,with the increase of load,the strain increased and the glass rod ulti-mately were compressed into flake-like form.Although the maximum engineering strain was larger than 70%,i.e.,the maximum true strain exceeded by 120%,the amorphous specimen was not fractured,indicating that it has super-plasticity at room temperature.Through the appropriate choice of compo-sition and optimization of the technological process,flexible BMG with super-plasticity at room tem-perature could be produced. | TAO PingJun YANG YuanZheng BAI XiaoJun XIE ZhiWei CHEN XianCao DONG ZhenJiang Wen JianGuo | 2008 | Chinese Science Bulletin2008，53，3： | 3 |
| 6 | Effects of rare-earth elements on the glass-forming ability and mechanical properties of Cu_(46)Zr_(47-x)Al_7M_x(M = Ce,Pr,Tb,and Gd) bulk metallic glasses显示文摘Cu46Zr47-xAl7Mx(M = Ce,Pr,Tb,and Gd) bulk metallic glassy(BMG) alloys were prepared by copper-mold vacuum suction casting.The effects of rare-earth elements on the glass-forming ability(GFA),thermal stability,and mechanical properties of Cu46Zr47-xAl7Mx were investigated.The GFA of Cu46Zr47-xAl7Mx(M = Ce,Pr) alloys is dependent on the content of Ce and Pr,and the optimal content is 4.at %.Cu46Zr47-xAl7Tbx(x = 2,4,and 5) amorphous alloys with a diameter of 5 mm can be prepared.The GFA of Cu46Zr47-xAl7Gdx(x = 2,4,and 5) increases with increasing Gd.Tx and Tp of all decrease.Tg is dependent on the rare-earth element and its content.△Tx for most of these alloys decreases except the Cu46Zr42Al7Gd5 alloy.The activation energies △Eg,△Ex,and △Ep for the Cu46Zr42Al7Gd5 BMG alloy with Kissinger equations are 340.7,211.3,and 211.3 kJ/mol,respectively.These values with Ozawa equations are 334.8,210.3,and 210.3 kJ/mol,respectively.The Cu46Zr45Al7Tb2 alloy presents the highest microhardness,Hv 590,while the Cu46Zr43Al7Pr4 alloy presents the least,Hv 479.The compressive strength(σc.f.) of the Cu46Zr43Al7Gd4 BMG alloy is higher than that of the Cu46Zr43Al7Tb4 BMG alloy. | XIE Zhiwei ZHANG Yongzhang YANG Yuanzheng CHEN Xianzhao TAO Pingjun | 2010 | Rare Metals2010，29，5： | 2 |
| 7 | Survey of virtual assembly and its perspective显示文摘 | LI Jianguang XIA Pingjun | | Aeronautical Manufacturing Technology0，201，3： | 1 |
| 8 | Temperature Influences on the Development and Demography of Bactrocera dorsalis( Diptera : Tephritidae ) in China 显示文摘 | Pingjun yang James R Carey | 1994 | Environ Entomol1994，23，4： | 1 |
| 9 | Customer intention to re- turn online: Price perception, attribute-level performance, and satisfaction unfolding over time 显示文摘 | Pingjun Jiang Rosenbloom Bert | 2005 | European Journal of Market- ing2005，39，12： | 1 |
| 10 | Sludge production and management processes case study in China 显示文摘 | Lee D J Spinosa L He Pingjun | 2006 | Wa- ter Science and Technology2006，54，5： | 1 |
| 11 | Density and Viscosity Measurements of Diethyl Adipate From (303 to 373) K and up to 20 MPa 显示文摘 | MENG Xianyang ZHENG Pingjun WU Jiangtao | 2008 | J Chem Eng Data2008，53，6： | 1 |
| 12 | Optimising assembly planning based on virtual reality and bionic algorithm显示文摘 | XIA Pingjun YAO Yingxue LIU Jingsheng | 2006 | International Journal of Manufacturing Technology and Management2006，9，34： | 1 |
| 13 | Selective hydrogenation of benzene over Ru/SBA-15 catalyst prepared by the 'double solvents' impregnation method 显示文摘 | Bu Juan PeiYan Guo Pingjun | 2007 | Studies in Surface Science and Catalysis2007，165，： | 1 |
| 14 | Cu/Si O2catalysts prepared by the ammonia-evaporation method:texture,structure,and catalytic performance in hydrogenation of dimethyl oxalate to ethylene glycol显示文摘 | Chen Liangfeng Guo Pingjun Qiao Minghua | 2008 | Journal of Catalysis2008，257，1： | 1 |
| 15 | Colloidal RuB/Al2O3-xH2O catalyst for liquid phase hydrogenation of benzene to cyclohexene显示文摘 | Jianqiang Wang Pingjun Guo Shirun Yah | 2004 | Journal of Molecular Catalysis A: Chemical2004，222，： | 1 |
| 16 | Customer Intention to Return Online: Price Perception, Attribute-level Performance, and Satisfaction Unfolding over Time显示文摘 | Pingjun Jiang and Bert Rosenbloom | 2005 | European Journal of Marketing2005，39，12： | 1 |
| 17 | A model of price search behavior in electronic marketplace显示文摘 | | 2002 | Internet Research2002，，12： | 1 |
| 18 | Customer Intentionto Return Online: Price Perception, Attribute -level Per-formance, and Satisfaction Unfolding over Time显示文摘 | Pingjun Jiang and Bert Rosenbloom | 2005 | Euro-pean Journal of Marketing2005，，12： | 1 |
| 19 | Density and viscosity measurements of diethyl adipate from(303 to 373)K and up to 20 MPa显示文摘 | Meng Xianyang Zheng Pingjun Wu Jiangtao Liu Zhigang | 2008 | Journal of Chemical and Engineering Data2008，53，7： | 1 |
| 20 | Cu/SiO2 Catalysts Prepared by the Ammonia-Evaporation Method: Texture, Structure, and Catalytic Performance in Hydrogena- tion of Dimethyl Oxalate to Ethylene Glycol 显示文摘 | Chela Liangfeng Guo Pingjun Qiao Minghua | 2008 | J Catal2008，257，1： | 1 |
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