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| 1 | 元建模技术研究进展显示文摘随着UML(unified modeling language)与MDA(model driven architecture)的兴起和流行,模型已经成为软件开发的核心制品,而模型重要性的提升使得建模语言以及定义建模语言的元模型逐渐成为软件开发中的一个核心要素.软件开发往往涉及多个领域,而不同的领域往往需要不同的建模语言及其建模工具.但是,手工地为不同的建模语言开发建模工具代价高昂.元建模技术是解决这个问题的方法之一,通过元建模,可以根据领域需要定制合适的元模型以定义领域建模语言,进而自动生成支持该建模语言的建模工具.大量的工程实践表明,与领域建模以及MDA相结合,元建模可以大幅度地提高软件开发效率,基于元建模的MDA比基于通用建模语言的MDA更具潜力.在最近的几年中,元建模及其相关技术发展迅猛,不但在技术上取得了长足的进步,而且在产业界也开始出现大规模的商业应用.总结了元建模的现有研究成果,分析和比较了现有元建模工具,探讨了元建模的可能发展方向.对元建模中存在的问题进行分析,并指出了可能的解决途径. | 刘辉 麻志毅 邵维忠 | 2008 | 软件学报2008，19，6： | 46 |
| 2 | Modeling of surface texturing in hydrodynamic lubrication显示文摘Theoretical modeling of surface texturing in hydrodynamic lubrication is a necessary first step to obtain favorable effect of the texturing.This invited review presents a comprehensive summary of the modeling of several basic applications that was done mostly by the author’s group at Technion and published in the relevant literature. | Izhak ETSION | 2013 | Friction2013，1，3： | 45 |
| 3 | 2013年1月华北平原重霾成因模拟分析显示文摘2013年1月华北平原出现了罕见的重污染天气过程,并引发连续多天大范围重霾现象。利用中华人民共和国环境保护部公布的空气污染指数日值数据和气象常规观测数据,结合区域空气质量模式系统RAMS-CMAQ的模拟结果,对1月10~15日污染过程的气象要素和关键气溶胶物种时空分布特征进行了详细分析,并对灰霾成因进行了探讨。结果表明,受本次污染过程影响的区域主要分布在北京-天津-唐山、河北省中南部和山东省大部。这些地区细颗粒物(即PM2.5)日均质量浓度超过120 μg m-3,且基本被灰霾覆盖,日均能见度在5~8 km之间。其中在北京、天津、石家庄和济南市及周边地区细颗粒物日均质量浓度可达250~300 μg m-3,部分市区可超过300 μg m-3,而日均能见度则可下降至3 km以下,形成重度灰霾。此外,对气象场的分析显示,本次污染过程期间华北平原大部分地区水平风速较多年平均值偏小约20%,且有明显逆温层覆盖,北京-天津-唐山、河北省南部和山东省北部的相对湿度则较多年平均值偏高达10%~40%。这样的气象条件不仅造成污染物易于堆积,而且有利于吸湿性粒子消光效应的快速增长,使能见度明显下降,是引发灰霾的重要因素之一。在北京地区引发灰霾的主要气溶胶物种为硫酸盐、硝酸盐和铵盐,这3种无机盐对近地面的消光贡献比率达到50%以上。其中硝酸盐的消光贡献比率最高,可达总体效应的1/4,表明在这次污染过程中除相关工业源排放外,交通源排放也是北京地区主要的污染源之一。 | 韩霄 张美根 | 2014 | 气候与环境研究2014，19，2： | 34 |
| 4 | A Text Sentiment Classification Modeling Method Based on Coordinated CNN-LSTM-Attention Model显示文摘The major challenge that text sentiment classification modeling faces is how to capture the intrinsic semantic, emotional dependence information and the key part of the emotional expression of text. To solve this problem, we proposed a Coordinated CNNLSTM-Attention(CCLA) model. We learned the vector representations of sentence with CCLA unit. Semantic and emotional information of sentences and their relations are adaptively encoded to vector representations of document.We used softmax regression classifier to identify the sentiment tendencies in the text. Compared with other methods, the CCLA model can well capture the local and long distance semantic and emotional information.Experimental results demonstrated the effectiveness of CCLA model. It shows superior performances over several state-of-the-art baseline methods. | ZHANG Yangsen ZHENG Jia JIANG Yuru HUANG Gaijuan CHEN Ruoyu | 2019 | Chinese Journal of Electronics2019，28，1： | 32 |
| 5 | Numerical modeling of concrete hydraulic fracturing with extended finite element method显示文摘The extended finite element method (XFEM) is a new numerical method for modeling discontinuity. Research about numerical modeling for concrete hydraulic fracturing by XFEM is explored. By building the virtual work principle of the fracture problem considering water pressure on the crack surface, the governing equations of XFEM for hydraulic fracture modeling are derived. Implementation of the XFEM for hydraulic fracturing is presented. Finally, the method is verified by two examples and the advan- tages of the XFEM for hydraulic fracturing analysis are displayed. | REN QingWen DONG YuWen YU TianTang | 2009 | Science China(Technological Sciences)2009，52，3： | 29 |
| 6 | A shallow aftershock sequence in the north-eastern end of the Wenchuan earthquake aftershock zone显示文摘Previous studies show that mature faults are filled with fault gouge in the shallow part and thus cannot accumulate enough strain energy for earthquakes. Therefore most earthquakes are deeper than 5 km, except those events occurring on new faults or in intact rocks. From field observation, Wenchuan earthquake is found to rupture the free surface about 200 km, but the rupture may extend underground much further from teleseismic body waves inversion and aftershocks distribution. In the northeastern end of the rupture zone, deep rupture may induce stress increase near the free surface, and trigger shallow earthquakes. An Ms 5.7 aftershock occurred at Qingchuan, northeast end of Wenchuan earthquake fault on July 24, 2008, featuring thrust mechanism with a 3 km source centroid depth. The shallow focal depth is confirmed with the sPL phase recorded at station L0205. As Rayleigh wave is well only developed for source depth less than 1/5 of epicentral distance, the observed large amplitude of Rg at a distance of 15 km implied depth of 3 km or less. Dozens of aftershocks' sPL waveforms are also analyzed to confirm the source depths less than 3 km. On the other hand, no surface ruptures are found by geological survey or InSAR studies. It is strongly suggested that these aftershock sequences initiate fresh rupture in intact rocks triggered by stress increase from the deep co-seismic rupture of the Wenchuan mainshock. | Luo Yan Ni SiDao Zeng XiangFang Zheng Yong Chen QiFu Chen Yong | 2010 | Science China Earth Sciences2010，53，11： | 26 |
| 7 | Numerical simulation of strong ground motion for the M_s8.0 Wenchuan earthquake of 12 May 2008显示文摘The Wenchuan earthquake of 12 May 2008 is the most destructive earthquake in China in the past 30 years in terms of property damage and human losses. In order to understand the earthquake process and the geo-morphological factors affecting the seismic hazard, we simulated the strong ground mo-tion caused by the earthquake, incorporating three-dimensional (3D) earth structure, finite-fault rupture, and realistic surface topography. The simulated ground motions reveal that the fault rupture and basin structure control the overall pattern of the peak ground shaking. Large peak ground velocity (PGV) is distributed in two narrow areas: one with the largest PGV values is above the hanging wall of the fault and attributed to the locations of fault asperities and rupture directivity; the other is along the north-western margin of the Sichuan Basin and caused by both the directivity of fault rupture and the ampli-fication in the thick sediment basin. Rough topography above the rupture fault causes wave scattering, resulting in significantly larger peak ground motion on the apex of topographic relief than in the valley. Topography and scattering also reduce the wave energy in the forward direction of fault rupture but increase the PGV in other parts of the basin. These results suggest the need for a localized hazard as-sessment in places of rough topography that takes the topographic effects into account. Finally, had the earthquake started at the northeast end of the fault zone and ruptured to the southwest, Chengdu would have suffered a much stronger shaking than it experienced on 12 May, 2008. | ZHANG Wei SHEN Yang CHEN XiaoFei | 2008 | Science China Earth Sciences2008，51，12： | 26 |
| 8 | Constraining the stepwise migration of the eastern Tibetan Plateau margin by apatite fission track thermochronology显示文摘Granites sampled from Garzê-Litang thrust, Longmen Shan thrust, Garzê and Litang strike-slip faults in the eastern Tibetan Plateau have been analyzed with apatite fission track thermochronological method in this study. The measured fission track apparent ages, combined with the simulated annealing mod- eling of the thermal history, have been used to reconstruct the thermal evolutionary histories of the samples and interpret the active history of the thrusts and faults in these areas. Thermal history mod- eling shows that earlier tectonic cooling occurred in the Garzê-Litang thrust in Miocene (~20―16 Ma) whereas the later cooling occurred mainly in the Longmen Shan thrust since ~5 Ma. Our study sug- gests that the margin of eastern Tibetan Plateau was extended by stages: through strike-slip faults deformations and related thrusts, the upper crust formed the Garzê-Litang margin in the Miocene epoch and then moved to the Longmen Shan margin since ~5 Ma. During this process, the deformations of different phases in the eastern Tibetan Plateau were absorbed by the thrusts within them and conse- quently the tectonic events of long-distance slip and extrusion up to hundreds of kilometers have not been found. | LAI QingZhou DING Lin WANG HongWei YUE YaHui CAI FuLong | 2007 | Science China Earth Sciences2007，50，2： | 24 |
| 9 | Altered trends in carbon uptake in China’s terrestrial ecosystems under the enhanced summer monsoon and warming hiatus显示文摘The carbon budgets in terrestrial ecosystems in China are strongly coupled with climate changes.Over the past decade,China has experienced dramatic climate changes characterized by enhanced summer monsoon and decelerated warming.However,the changes in the trends of terrestrial net ecosystem production(NEP)in China under climate changes are not well documented.Here,we used three ecosystem models to simulate the spatiotemporal variations in China's NEP during 1982–2010 and quantify the contribution of the strengthened summer monsoon and warming hiatus to the NEP variations in four distinct climatic regions of the country.Our results revealed a decadal-scale shift in NEP from a downtrend of–5.95 Tg C/yr^2(reduced sink)during 1982–2000 to an uptrend of 14.22 Tg C/yr^2(enhanced sink)during 2000–10.This shift was essentially induced by the strengthened summer monsoon,which stimulated carbon uptake,and the warming hiatus,which lessened the decrease in the NEP trend.Compared to the contribution of 56.3%by the climate effect,atmospheric CO2 concentration and nitrogen deposition had relatively small contributions(8.6 and 11.3%,respectively)to the shift.In conclusion,within the context of the global-warming hiatus,the strengthening of the summer monsoon is a critical climate factor that enhances carbon uptake in China due to the asymmetric response of photosynthesis and respiration.Our study not only revealed the shift in ecosystem carbon sequestration in China in recent decades,but also provides some insight for understanding ecosystem carbon dynamics in other monsoonal areas. | Honglin He Shaoqiang Wang Li Zhang Junbang Wang Xiaoli Ren Lei Zhou Shilong Piao Hao Yan Weimin Ju Fengxue Gu Shiyong Yu Yuanhe Yang Miaomiao Wang Zhongen Niu Rcmg Ge Huimin Yan Mei Huang Guoyi Zhou Yongfei Bai Zongqiang Xie Zhiyao Tang Bingfang Wu Leiming Zhang Nianpeng He Qiufeng Wang Guirui Yu | 2019 | National Science Review2019，6，3： | 24 |
| 10 | Process Modeling for Heat Treatment: Current Status and Future Developments显示文摘Heat Treating is a critical manufacturing technology. This is particularly true in countries with large manufacturing industry including:; automotive, construction, transportation, and aerospace sectors. Technical advancement of the heat treating industry will be a critical component of the increasing need to remain competitive in this manufacturing sector on a global scale. ASM International has identified the development of process modeling and numerical simulation as a critical technology for the advancement of the heat treating process industry. In this paper, a selective overview of the current accomplishments and future needs of process modeling technologies in heat treatment will be provided. | Tatsuo Inoue, Kiyoshi Funatani and George E. Totters 1.Department of Energy Conversion Science, Kyoto University, Kyoto, Japan 2.Nihan Parkurizing Co., Ltd., Nagoya, Japan 3.Union Carbide Corporation, Tarrytown, NY, USA | 2000 | Journal of Shanghai Jiaotong university(Science)2000，5，1： | 23 |
| 11 | Temporal variations and source apportionment of volatile organic compounds at an urban site in Shijiazhuang, China显示文摘Shijiazhuang,the city with the worst air quality in China,is suffering from severe ozone pollution in summer.As the key precursors of ozone generation,it is necessary to control the Volatile Organic Compounds(VOCs)pollution.To have a better understanding of the pollution status and source contribution,the concentrations of 117 ambient VOCs were analyzed from April to August 2018 in an urban site in Shijiazhuang.Results showed that the monthly average concentration of total VOCs was 66.27 ppbv,in which,the oxygenated VOCs(37.89%),alkanes(33.89%),and halogenated hydrocarbons(13.31%)were the main composite on.Eight major sources were identified using Positive Matrix Factorization modeling with an accurate VOCs emission inventory as inter-complementary methods revealed that the petrochemical industry(26.24%),other industrial sources(15.19%),and traffic source(12.24%)were the major sources for ambient VOCs in Shijiazhuang.The spatial distributions of major industrial activities emissions were identified by using geographic information statistics system,which illustrated the VOCs was mainly from the north and southeast of Shijiazhuang.The inverse trajectory analysis using Hybrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)and Potential Source Contribution Function(PSCF)clearly demonstrated the features of pollutant transport to Shijiazhuang.These findings can provide references for local governments regarding control strategies to reduce VOCs emissions. | Yanan Guan Lei Wang Shujuan Wang Yihao Zhang Jieying Xiao Xiaoli Wang Erhong Duan Li'an Hou | 2020 | Journal of Environmental Sciences2020，32，11： | 19 |
| 12 | A review of aerial manipulation of small-scale rotorcraft unmanned robotic systems显示文摘Small-scale rotorcraft unmanned robotic systems(SRURSs) are a kind of unmanned rotorcraft with manipulating devices. This review aims to provide an overview on aerial manipulation of SRURSs nowadays and promote relative research in the future. In the past decade, aerial manipulation of SRURSs has attracted the interest of researchers globally. This paper provides a literature review of the last 10 years(2008–2017) on SRURSs, and details achievements and challenges. Firstly, the definition, current state, development, classification, and challenges of SRURSs are introduced. Then, related papers are organized into two topical categories: mechanical structure design, and modeling and control. Following this, research groups involved in SRURS research and their major achievements are summarized and classified in the form of tables. The research groups are introduced in detail from seven parts. Finally, trends and challenges are compiled and presented to serve as a resource for researchers interested in aerial manipulation of SRURSs. The problem,trends, and challenges are described from three aspects. Conclusions of the paper are presented,and the future of SRURSs is discussed to enable further research interests. | Xilun DING Pin GUO Kun XU Yushu YU | 2019 | Chinese Journal of Aeronautics2019，32，1： | 18 |
| 13 | Activity criterion of pre-existing fabrics in non-homogeneous deformation domain显示文摘The Anderson's model can be applied only to elastic homogeneous deformation and cannot explain complicated phenomena of natural faults, which to a large degree limits the model to practical application. By combing the Coulomb-Mohr Criterion with the sandbox modeling and considering non-homogeneous deformation, mechanisms of how basement pre-existing fabrics control fault formation and evolution are analyzed and a mechanical factor, activation-coefficient (faS) of pre-existing fabrics, is proposed. It is determined by the attitude and mechanical properties of pre-existing fabric, and the stress state (the magnitudes and directions of the three principal stresses). The coefficient has taken the heterogeneity of rocks into account and may serve as a criterion for evaluating the activity of a pre-existing fabric. The Mohr-Coulomb Criterion is expanded to non-homogeneous deformation domain in terms of activation-coefficient (faS) of pre-existing fabrics, the general law of the activity of a pre-existing fabric is predicted, the fault complexity real of rift basin is revealed in theory, and the controlling law of basement pre-existing faults to fault formation and evolution is determined, and checked with sandbox modeling. A new way is provided for in-depth study of faulting. | TONG HengMao CAI DongSheng WU YongPing LI XiaoGuang LI XuShen MENG LingJian | 2010 | Science China Earth Sciences2010，53，8： | 17 |
| 14 | Preliminary study on LGM climate simulation and the diagnosis for East Asia显示文摘LGM climate study is a hot topic in international fields on global changes. Climate simulation in this study applies both common designs of 21 kaBP boundary conditions from the Paleoclimate Modeling Intercomparison Project (PMIP), including insolation, glaciation, sea surface temperature and atmospheric CO2 concentration, and land surface conditions from Eurasia continent by compilation of geological evidence. The simulation outputs are in agreement with climate spatial patterns reconstructed by observation records. Sensitive experiment on land surface conditions shows that changes in vegetation would make significant impacts on temperature and precipitation. Particularly in the Tibetan Plateau, this change would increase in differences of winter and summer temperature, precipitation and P-E. | YU Ge CHEN Xing LIU Jian WANG Sumin | 2001 | Chinese Science Bulletin2001，46，5： | 16 |
| 15 | 基于AnyBody的汽车驾驶中人体腿部逆向动力学仿真显示文摘为了更好地了解汽车驾驶时人体腿部肌骨的受力状况,建立了腿部肌骨模型并进行了生物力学分析。结合人机工程学相关知识和驾驶室内人体腿部的空间几何关系,利用AnyBody Modeling System软件建立了人体腿部的肌骨模型,对正常行驶过程中踩踏油门踏板的实例进行了腿部逆向动力学仿真,并分析了腿部肌肉活动状态以及关节节点力。仿真结果表明,负载较大的股外侧肌、股内侧肌、股中间肌以及股直肌的激活度均在20%以内,趾骨节点处负载最大为346.43 N,为确定合理的踏板操纵力提供了依据。 | 丁晨 王君泽 高瞻 | 2013 | 中国生物医学工程学报2013，32，1： | 16 |
| 16 | Application of Seasonal Auto-regressive Integrated Moving Average Model in Forecasting the Incidence of Hand-foot-mouth Disease in Wuhan,China显示文摘Outbreaks of hand-foot-mouth disease(HFMD) have occurred many times and caused serious health burden in China since 2008. Application of modern information technology to prediction and early response can be helpful for efficient HFMD prevention and control. A seasonal auto-regressive integrated moving average(ARIMA) model for time series analysis was designed in this study. Eighty-four-month(from January 2009 to December 2015) retrospective data obtained from the Chinese Information System for Disease Prevention and Control were subjected to ARIMA modeling. The coefficient of determination(R^2), normalized Bayesian Information Criterion(BIC) and Q-test P value were used to evaluate the goodness-of-fit of constructed models. Subsequently, the best-fitted ARIMA model was applied to predict the expected incidence of HFMD from January 2016 to December 2016. The best-fitted seasonal ARIMA model was identified as(1,0,1)(0,1,1)12, with the largest coefficient of determination(R^2=0.743) and lowest normalized BIC(BIC=3.645) value. The residuals of the model also showed non-significant autocorrelations(P_(Box-Ljung(Q))=0.299). The predictions by the optimum ARIMA model adequately captured the pattern in the data and exhibited two peaks of activity over the forecast interval, including a major peak during April to June, and again a light peak for September to November. The ARIMA model proposed in this study can forecast HFMD incidence trend effectively, which could provide useful support for future HFMD prevention and control in the study area. Besides, further observations should be added continually into the modeling data set, and parameters of the models should be adjusted accordingly. | 彭颖 余滨 汪鹏 孔德广 陈邦华 杨小兵 | 2017 | Journal of Huazhong University of Science and Technology(Medical Sciences)2017，37，6： | 16 |
| 17 | Stability analysis of large-scale stope using stage subsequent fillingmining method in Sijiaying iron mine显示文摘To improve mining production capacity, a stage subsequent filling mining(SSFM) method is employed for Sijiaying iron mine. The height of the stage stope is approximately 100 m. As there are farmlands and villages on the surface of the mine, the surface deformation should be controlled when the ore is mined out for the purpose of stope stability and minimizing surface subsidence. In this paper, according to the site-specificgeological conditions, the self-stability of the stagefi lling body was analyzed, and the failure mechanism of back filling body was defined. Thus the relationship between the exposed height of filling body and the required strength was obtained. Next, the stability of back filling body and the characteristics of surface subsidence due to mining of 450 m level were analyzed using physical modeling.Finally, a three-dimensional numerical model was established using FLAC3 D, with which the surface subsidence and the stability of stope were achieved. The results show that the stope basically remains stable during the two-step recovery process. The maximum magnitude of the incline is 10.99 mm/m, a little larger than the permissible value of 10 mm/m, and the horizontal deformation is 5.9 mm/m,approaching the critical value of 6.0 mm/m, suggesting that the mine design is feasible for safety mining. | Zhiqiang Yang Shuhua Zhai Qian Gao Maohui Li | 2015 | 岩石力学与工程学报2015，34，1： | 15 |
| 18 | Hierarchy modeling of subsurface palaeochannel reservoir architecture显示文摘The studies on fluvial reservoir architecture are mainly aimed at outcrop and modern deposition,but rarely at the subsurface reservoir,so there are few effective methods to predict the distribution of subsurface reservoir architectures. In this paper,taking the meandering river reservoir of Guantao formation Gudao Oilfield,Jiyang depression,Baohai Gulf Basin,East China as an example,the archi-tectural modeling method of complex meandering belt reservoir is proposed,that is hierarchy con-straint,pattern fitting and multi-dimensional interaction. Architectures of meandering river reservoir can be divided into three hierarchies: meandering channel sandbody,point bar and lateral accretion body. Different hierarchies of the quantitative architecture pattern are fitted to subsurface well data (including dynamic monitoring data) in different hierarchies through one-dimensional hole,2D profiles and plane and 3D space,which are verified by each other. And then 3D model in different hierarchies is established. At the same time,the quantificational relationship between width of active river and the scale of point bar is set up,and the scale of lateral accretion sand body and shale beddings is con-firmed with horizontal well data. The study not only has significant meaning on the development of geology,but also can improve the oilfield exploitation greatly. | WU ShengHe1,YUE DaLi1,LIU JianMin2,SHU QingLin2,FAN Zheng1,3 & LI YuPeng1 1 Earth Sciences and Geoinformatics School,China University of Petroleum,Beijing 102249,China 2 SINOPEC Shengli Oilfield Co. Ltd.,Dongying 257000,China 3 Beijing Telon High-tech Corporation,Beijing 100085,China | 2008 | Science China Earth Sciences2008，51，S2： | 15 |
| 19 | Numerical simulation of gas flow process in mining-induced crack network显示文摘The exploitation of coal bed methane or coal gas is one of the most effective solutions of the problem of coal gas hazard.A better understanding of gas flow in mining-induced cracks plays an important role in comprehensive development and utilization of coal gas as well as prevention of coal gas hazard.This paper presents a case study of gas flow in mining-induced crack network regarding the situation of low permeability of coal seam.A two-dimensional physical model is constructed on the basis of geological background of mining face No.1122(1) in coal seam No.11-2,Zhangji Coal Mine,Huainan Mining Group Corporation.The mining-induced stress and cracks in overburden rocks are obtained by simulating an extraction in physical model.An evolution of mining-induced cracks in the process of advancing of coal mining face is characterized and three typical crack networks are taken from digital photos by means of image analysis.Moreover,the numerical software named COMSOL Multiphysics is employed to simulate the process of gas flow in three representative crack networks.Isograms of gas pressure at various times in mining-induced crack networks are plotted,suggesting a shape and dimension of gas accumulation area. | Zhou Hongwei Liu Jinfeng Xue Dongjie Yi Haiyang Xue Junhua | 2012 | International Journal of Mining Science and Technology2012，22，6： | 14 |
| 20 | Modeling of radionickel sorption on MX-80 bentonite as a function of pH and ionic strength显示文摘MX-80 bentonite was detected using acid-based titration, XRD and FTIR in detail. The sorption behavior of 63Ni(Ⅱ) from aqueous solution to MX-80 bentonite was investigated as a function of solid content, ionic strength and pH by using batch technique. The experimental data of 63Ni(Ⅱ) sorption on MX-80 bentonite was obtained using the diffuse layer model (DLM) with the aid of FITEQL 3.1 program. The results indicated that the sorption of 63Ni(Ⅱ) on MX-80 bentonite was mainly dominated by surface complexation, and cation exchange also contributed partly to 63Ni(Ⅱ) sorption at low pH values. The sorption isotherms were simulated by Langmuir and Freundlich models, and the results indicated that Freundlich isotherm model fitted the sorption data better than the Langmuir isotherm model. The results are crucial to evaluate the sorption and migration of radionickel in MX-80 bentonite. | SHAO DaDong XU Di WANG SuoWei FANG QiaoHui WU WangSuo DONG YunHui WANG XiangKe | 2009 | Science China Chemistry2009，52，3： | 13 |
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