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| 1 | Evolution of coordination degree of eco-economic system and early-warning in the Yangtze River Delta显示文摘根据长江三角洲( YRD )经济的 Landsat TM 数据在 1991 , 2001 和 2008 的地区,这篇文章,作为学习单位在这个区域拿 90 个县,造的空间数据转变模型,生态系统服务价值( ESV )和eco经济的系统( CDES )的协作度当模特儿。在 ArcGIS9.3 的帮助下,集体格子和向量数据为空间分析被处理了。ESV 和 CDES 索引在研究区域表明了在经济开发和 eco 环境系统和它的进化特征之间的关系。而且,这些索引也被用于功能的 zoning 和模式识别。一些结果能如下被显示出。自从 1991,第一,在 YRD 的陆地使用极大地变化了:城市的陆地区域首先从原来的稻土地,干燥陆地,草地,花园阴谋和另外的陆地增加了。第二, ESV 模型从 1991 ~ 2001 并且更慢证明了 YRD 生态的系统的恶化趋势降级趋势在 20012008 期间。另外,来自到城市的区域和干燥土地的水区域和稻地的陆地使用变换能引起大损坏到生态系统稳定,这被说明。第三,自从 1991,在 YRD 的中央、南部的部分的 GDP 在北部分比那高。在中央部分的 GDP 生长率在 19912001 期间在北部分比那高。在中央部分的这生长率在从 2001 ~ 2008 的 YRD 的南部、北的部分也比那高。第四, YRD 能以 CDES 被分成分区的 12 种类型索引。根据它在学习区域的 CDES 索引价值的空间特征,有位于中央部分的低 CDES 价值的 eco 经济的冲突区域用高 CDES 价值由协调 eco 的区域被包围。这说明核心圆周空间结构在 YRD 存在。在 19912001 期间, CDES 价值在学习区域暗示了 eco 经济的系统的会聚的恶化趋势;当它逐渐地在 20012008 期间走了入分叉的恶化和协作的共存时。最后,这份报纸在 YRD 分析了五个分区,包括开始降级的地区,开始同等的地区,连续地降级的地区,衰退协作的地区和支持协作的地区,基于 eco 经济的协作和进化模式。,并且由空间转变模型。 | WANG Zhenbo FANG Chuanglin CHENG Shaowen WANG Jing | 2013 | Journal of Geographical Sciences2013，23，1： | 24 |
| 2 | Urban Construction Land Suitability Evaluation Based on Improved Multi-criteria Evaluation Based on GIS(MCE-GIS): Case of New Hefei City,China显示文摘Urban construction land suitability evaluation(UCLSE)is a complex system engineering and the basis for rational use of the limited urban land resources in China.It has an important practical value on urban construction land use planning and management from the angle of methodology.As a widely used technique,traditional multi-criteria evaluation based on GIS(MCE-GIS),is not suitable for UCLSE.This study develops an improved MCE-GIS method which could be more suitable for UCLSE based on urban complex ecological system theory and the summary of the shortcomings of traditional MCE-GIS.The improvements include three aspects:a composite evaluation index system rather than natural indexes alone,an index weight calculated by using fuzzy Analytic Hierarchy Process(AHP)method rather than the common AHP method,and the integrated overlay rule,which includes selecting the minimum value,weighted linear combination(WLC)and simple summation.The main advantage of this improved technique is that it can make UCLSE more comprehensive,more operational and more reasonable.It can provide a scientific basis for decision making in the planning and management of urban construction land use.The improved MCE-GIS system has been adopted in the New Hefei City,Anhui Province,China.Based on the results of UCLSE in New Hefei,three functional areas including construction-appropriate areas,construction-restricted areas and construction-forbidden areas could be worked out,in which 36.90%of the total study area could be developed as urban construction land and the remaining 63.10%should be protected as reserves land or as ecological land.Furthermore,the results can provide scientific decision support for spatial planning and eco-environment protection in New Hefei. | ZHANG Xiaorui FANG Chuanglin WANG Zhenbo MA Haitao | 2013 | Chinese Geographical Science2013，23，6： | 18 |
| 3 | CFD Study of NO_x Emissions in a Model Commercial Aircraft Engine Combustor显示文摘Air worthiness requirements of the aircraft engine emission bring new challenges to the combustor research and design. With the motivation to design high performance and clean combustor, computational fluid dynamics (CFD) is utilized as the powerful design approach. In this paper, Reynolds averaged Navier-Stokes (RANS) equations of reactive two-phase flow in an experimental low emission combustor is performed. The numerical approach uses an implicit compressible gas solver together with a Lagrangian liquid-phase tracking method and the extended coherent flamelet model for turbulence-combustion interaction. The NOx formation is modeled by the concept of post-processing, which resolves the NOx transport equation with the assumption of frozen temperature distribution. Both turbulence-combustion interaction model and NOx formation model are firstly evaluated by the comparison of experimental data published in open literature of a lean direct injection (LDI) combustor. The test rig studied in this paper is called low emission stirred swirl (LESS) combustor, which is a two-stage model combustor, fueled with liquid kerosene (RP-3) and designed by Beihang University (BUAA). The main stage of LESS combustor employs the principle of lean prevaporized and premixed (LPP) concept to reduce pollutant, and the pilot stage depends on a diffusion flame for flame stabili-zation. Detailed numerical results including species distribution, turbulence performance and burning performance are qualita-tively and quantitatively evaluated. Numerical prediction of NOx emission shows a good agreement with test data at both idle condition and full power condition of LESS combustor. Preliminary results of the flame structure are shown in this paper. The flame stabilization mechanism and NOx reduction effort are also discussed with in-depth analysis. | ZHANG Man FU Zhenbo LIN Yuzhen LI Jibao | 2012 | Chinese Journal of Aeronautics2012，25，6： | 14 |
| 4 | Aluminizing Low Carbon Steel at Lower Temperatures显示文摘This study reports the significantly enhanced aluminizing behaviors of a low carbon steel at temperatures far below the austenitizing temperature,with a nanostructured surface layer produced by surface mechanical attrition treatment(SMAT).A much thicker iron aluminide compound layer with a much enhanced growth kinetics of η-Fe2Al5 in the SMAT sample has been observed relative to the coarse-grained steel sample.Compared to the coarse-grained sample,a weakened texture is formed in the aluminide layer in the SMAT sample.The aluminizing kinetics is analyzed in terms of promoted diffusivity and nucleation frequency in the nanostructured surface layer. | Xiao Si Bining Lu Zhenbo Wang | 2009 | Journal of Materials Science & Technology2009，25，4： | 11 |
| 5 | Major advances in studies of the physical geography and living environment of China during the past 70 years and future prospects显示文摘The natural environment provides material essentials for human survival and development. The characteristics,processes, regional differentiation and forcing mechanisms of the elements of the natural environment(e.g. geomorphology,climate, hydrology, soil, etc.) are the main objects of research in physical geography. China has a complex natural environment and huge regional differentiation and therefore it provides outstanding reserach opportunities in physical geography. This review summarizes the most important developments and the main contributions of research in the physical geography and human living environment in China during the past 70 years. The major topics addressed are the uplift of the Tibetan Plateau and the evolution of its cryosphere, the development of fluvial systems, the acidification of the vast arid region of the Asian interior, variations in the monsoon and westerly climate systems on multiple timescales, the development of lakes and wetlands, the watershed system model, soil erosion, past human-environment interactions, biogeography, and physical geographic zonality. After briefly introducing international research developments, we review the history of research in physical geography in China, focusing on the major achievements and major academic debates, and finally we summarize the status of current research and the future prospects. We propose that in the context of the national demand for the construction of an ecological civilization, we should make full use of the research findings of physical geography, and determine the patterns and mechanisms of natural environmental processes in order to continue to promote the continued contribution of physical geography to national development strategies, and to further contribute to the theory of physical geography from a global perspective. | Fahu CHEN Bojie FU Jun XIA Duo WU Shaohong WU Yili ZHANG Hang SUN Yu LIU Xiaomin FANG Boqiang QIN Xin LI Tingjun ZHANG Baoyuan LIU Zhibao DONG Shugui HOU Lide TIAN Baiqing XU Guanghui DONG Jingyun ZHENG Wei YANG Xin WANG Zaijun LI Fei Wang Zhenbo HU Jie WANG Jianbao LIU Jianhui CHEN Wei HUANG Juzhi HOU Qiufang CAI Hao LONG Ming JIANG Yaxian HU Xiaoming FENG Xingguo MO Xiaoyan YANG Dongju ZHANG Xiuhong WANG Yunhe YIN Xiaochen LIU | 2019 | Science China Earth Sciences2019，62，11： | 11 |
| 6 | A hybrid model for dissolved oxygen prediction in aquaculture based on multi-scale features显示文摘To increase prediction accuracy of dissolved oxygen(DO)in aquaculture,a hybrid model based on multi-scale features using ensemble empirical mode decomposition(EEMD)is proposed.Firstly,original DO datasets are decomposed by EEMD and we get several components.Secondly,these components are used to reconstruct four terms including high frequency term,intermediate frequency term,low frequency term and trend term.Thirdly,according to the characteristics of high and intermediate frequency terms,which fluctuate violently,the least squares support vector machine(LSSVR)is used to predict the two terms.The fluctuation of low frequency term is gentle and periodic,so it can be modeled by BP neural network with an optimal mind evolutionary computation(MEC-BP).Then,the trend term is predicted using grey model(GM)because it is nearly linear.Finally,the prediction values of DO datasets are calculated by the sum of the forecasting values of all terms.The experimental results demonstrate that our hybrid model outperforms EEMD-ELM(extreme learning machine based on EEMD),EEMD-BP and MEC-BP models based on the mean absolute error(MAE),mean absolute percentage error(MAPE),mean square error(MSE)and root mean square error(RMSE).Our hybrid model is proven to be an effective approach to predict aquaculture DO. | Chen Li Zhenbo Li Jing Wu Ling Zhu Jun Yue | 2018 | Information Processing in Agriculture2018，5，1： | 10 |
| 7 | End-to-end deep learning framework for digital holographic reconstruction显示文摘Digital holography records the entire wavefront of an object,including amplitude and phase.To reconstruct the object numerically,we can backpropagate the hologram with Fresnel–Kirchhoff integralbased algorithms such as the angular spectrum method and the convolution method.Although effective,these techniques require prior knowledge,such as the object distance,the incident angle between the two beams,and the source wavelength.Undesirable zero-order and twin images have to be removed by an additional filtering operation,which is usually manual and consumes more time in off-axis configuration.In addition,for phase imaging,the phase aberration has to be compensated,and subsequently an unwrapping step is needed to recover the true object thickness.The former either requires additional hardware or strong assumptions,whereas the phase unwrapping algorithms are often sensitive to noise and distortion.Furthermore,for a multisectional object,an all-in-focus image and depth map are desired for many applications,but current approaches tend to be computationally demanding.We propose an end-to-end deep learning framework,called a holographic reconstruction network,to tackle these holographic reconstruction problems.Through this data-driven approach,we show that it is possible to reconstruct a noise-free image that does not require any prior knowledge and can handle phase imaging as well as depth map generation. | Zhenbo Ren Zhimin Xu Edmund YLam | 2019 | Advanced Photonics2019，1，1： | 10 |
| 8 | Experimental and numerical studies of a lean-burn internally-staged combustor显示文摘A lean-burn internally-staged combustor for low emissions that can be used in civil aviation gas turbines is introduced in this paper. The main stage is designed and optimized in terms of fuel evaporation ratio, fuel/air pre-mixture uniformity, and particle residence time using commercial computational fluid dynamics(CFD) software. A single-module rectangular combustor is adopted in performance tests including lean ignition, lean blowout, combustion efficiency, emissions, and combustion oscillation using aviation kerosene. Furthermore, nitrogen oxides(NOx)emission is also predicted using CFD simulation to compare with test results. Under normal inlet temperature, this combustor can be ignited easily with normal and negative inlet pressures. The lean blowout fuel/air ratio(LBO FAR) at the idle condition is 0.0049. The fuel split proportions between the pilot and main stages are determined through balancing emissions, combustion efficiency, and combustion oscillation. Within the landing and take-off(LTO) cycle, this combustor enables 42%NOxreduction of the standard set by the 6th Committee on Aviation Environmental Protection(CAEP/6) with high combustion efficiency. The maximum board-band pressure oscillations of inlet air and fuel are below 1% of total pressure during steady-state operations at the LTO cycle specific conditions. | Fu Zhenbo Lin Yuzhen Li Lin Zhang Chi | 2014 | Chinese Journal of Aeronautics2014，27，3： | 9 |
| 9 | Advantages and dynamics of urban agglomeration development on Yangtze River Delta显示文摘长江三角洲(UA-YRD ) 上的城市的凝块在水,土地,生态的环境,地点和交通的方面有一些优点。依靠资源环境库和另外的优点, UA-YRD 完成了大开发。基于索引系统和全面评估的模型,自从 1978,纸计算 UA-YRD 的发展水平。从 1978~2007 ,开发水平以 0.0333 的年度率逐年增加了的结果表演,和开发的进程能被划分成三个阶段,即低速度的开发舞台( 19781991 ),快速的开发舞台( 19912000 ),并且高速度的开发舞台( 20002007 )。速度分别地是 0.0083, 0.0356 和 0.0766。在 30 年的发展期间,外国经济活动在开发有最大的效果,由交通,工业经济活动和电信列在后面(有序) 。另外,不同驱动力在不同阶段有不同效果。纸建议更多的注意应该对高速度的发展阶段和重要驱动力被给予驾驶它的发展。同时,资源和环境的限制不应该被忽视,长有效的机制需要被证实在 UA 发展,资源利用和环境保护之中支撑和谐开发。一些比较研究应该着急地被执行有效地支持并且支持 UA 的持续开发,特别向进化,驱动力和 braking 力量。 | WANG Jing FANG Chuanglin WANG Zhenbo | 2012 | Journal of Geographical Sciences2012，22，3： | 9 |
| 10 | Review-material degradation assessed by digital image processing:Fundamentals,progresses,and challenges显示文摘Material degradation is accompanied by the changes in surface structure,morphology,and composition.These changes can be recorded by a variety of image acquisition devices that export digital images in grayscale or true color to a detector.Information regarding corrosion type and extent can be extracted with image processing methods.This paper provides a comprehensive review of material degradation assessed by digital image processing.Digital image processing systems used to assess material degradation are briefly reviewed,and the algorithms developed to process metallic materials degradation images are described.Physical and electrochemical methods that can be used to support digital image processing results are summarized,and future work that will augment the present methods of evaluating material degradation are discussed. | Da-Hai Xia Shizhe Song Lei Tao Zhenbo Qin Zhong Wu Zhiming Gao Jihui Wang Wenbin Hu Yashar Behnamian Jing-Li Luo | 2020 | Journal of Materials Science & Technology2020，52，18： | 8 |
| 11 | Real-time control for fuel-optimal Moon landing based on an interactive deep reinforcement learning algorithm显示文摘In this study,a real-time optimal control approach is proposed using an interactive deep reinforcement learning algorithm for the Moon fuel-optimal landing problem.Considering the remote communication restrictions and environmental uncertainties,advanced landing control techniques are demanded to meet the high requirements of real-time performance and autonomy in the Moon landing missions.Deep reinforcement learning(DRL)algorithms have been recently developed for real-time optimal control but suffer the obstacles of slow convergence and difficult reward function design.To address these problems,a DRL algorithm is developed using an actor-indirect method architecture to achieve the optimal control of the Moon landing mission.In this DRL algorithm,an indirect method is employed to generate the optimal control actions for the deep neural network(DNN)learning,while the trained DNNs provide good initial guesses for the indirect method to promote the efficiency of training data generation.Through sufficient learning of the state-action relationship,the trained DNNs can approximate the optimal actions and steer the spacecraft to the target in real time.Additionally,a nonlinear feedback controller is developed to improve the terminal landing accuracy.Numerical simulations are given to verify the effectiveness of the proposed DRL algorithm and demonstrate the performance of the developed optimal landing controller. | Lin Cheng Zhenbo Wang Fanghua Jiang | 2019 | Astrodynamics2019，3，4： | 8 |
| 12 | The sustainable development of innovative cities in China: Comprehensive assessment and future configuration显示文摘创新城市不仅为革新活动组成一个重要基础,而且在构造一个创新乡村,生产城市的开发的新形式,并且促进城市的持续开发起一个战略上关键的作用。当前,中国向在 2020 建立一个创新乡村的目标正在前进,但是创新城市建设在这的启动阶段处理,到革新驱动的开发的从因素驱动的开发的基本转变没正在被认识到。作为结果,宽差距当前在发达乡村在瓷器创新城市和先进创新城市之间存在。这份报纸主张这必要转变被一系列瓶颈在投资,收入,技术,贡献,和才能正在抑制。文章作为它全面评价的对象拿 287 个府级的城市,开发为创新城市的一个全面评价系统并且设计创新监视系统软件以便评估在瓷器创新城市建设的当前的状况。分析也就是探讨四个关键方面,独立革新,工业革新,生活环境革新,和机构的革新以及创新城市构造的空间异质处理。结果证明中国城市里的革新的水平是低的,并且纸警告那建设一个面向革新的乡村愿望,作为后果,困难。大约 87.8% 城市学习了比国家一般水准低的革新的维持的全面层次。一个城市里的全面革新的水平被发现与经济开发有靠近、积极的关联。特别地,中国的东方区域的水平被发现比中央、西方的区域的显著地高。城市的独立革新,工业革新,环境革新,和机构的革新的层次显示出一致空间异质,作为在城市里做了革新的全面水平。以后,作者建议,中国应该根据独立革新的基本原则加快构造过程,关键领域里的突破,面向市场的、地区性的相互作用,支持才能与建立北京的咕噜咕噜叫姿势,深圳,上海,并且广州同样全球的革新集中;并且南京,苏州,厦门, Hangzhou, Wuxi, Xian,武汉,沈阳, Dalian,天津,长沙, Qingdao, Chengdu,长春, Hefei,和重庆同样国家的革新集中,在 2020通过这进程,中国将最后造包括 4 个全球创新城市, 16 个国家创新城市, 30 个地区性的创新城市, 55 个本地创新城市,和 182 个革新驱动的开发城市的一个国家城市的革新网络,从而在 2020 贡献一个创新乡村的建立。 | FANG Chuanglin MA Haitao WANG Zhenbo LI Guangdong | 2014 | Journal of Geographical Sciences2014，24，6： | 8 |
| 13 | Spatial relationship of high-speed transportation construction and land-use efficiency and its mechanism:Case study of Shandong Peninsula urban agglomeration显示文摘Land-use efficiency is low for the urban agglomeration of China.High-speed transportation construction has been an important factor driving land use change.It is criti?cally importa nt to explore the spatial relati on ship between the high-speed transportation su?periority degree and land-use efficie ncy.We built a model to evaluate the ben efits of con?venient high-speed transportation using the relative density of highways and the distanee from high-speed rail stations and airports as a metric.We used 42 coun ties of the Shan dong Peninsula urban agglomeration as an example.Land?use efficiency was calculated by a DEA model with capital,labor,economic ben efits and envir on mental ben efits as input and output factors.We examined the spatial relati on ships betwee n high-speed tran sport superiority degree and land-use efficiency and obtained the following results.First,there are significant spatial differe nces in the relati on ships betwee n the high-speed transportati on superiority degree and land-use efficiency.Taking the two major cities of Jinan and Qingdao as the hubs,the core surrounding counties show significant spatial relationship between land-use efficiency and the high-speed transportation superiority degree.Spatial correlation declines as the distance from the hubs in creases.Land-use efficiency is less tha n high-speed tran sportation convenience in areas along the transportation trunks that are distant from the hub cities.Correlation is low in areas that are away from both hub cities and transportation trunk routes.Second,high-speed transportation has a positive relationship with land?use efficiency due to the mechanism of element agglomeration exogenous growth.Third,high-speed transportation facilitates the flow of goods,services and tech no logies between core cities and peripheral cities as space spillover(the hub effect).This alters the spatial pattern of regional land-use efficiency.Fin ally,the short-board effect caused by decreased high-speed tran sport corn struction can be balaneed by highway construction and the proper node layouts of high-speed rail stations and airports,resulting in a well-balaneed spatial pattern of land?use efficiency. | CUI Xuegang FANG Chuanglin WANG Zhenbo BAO Chao | 2019 | Journal of Geographical Sciences2019，29，4： | 8 |
| 14 | Heterogeneous lamellar-edged Fe-Ni(OH)_(2)/Ni_(3)S_(2)nanoarray for efficient and stable seawater oxidation显示文摘Development of efficient non-precious catalysts for seawater electrolysis is of great significance but challenging due to the sluggish kinetics of oxygen evolution reaction(OER)and the impairment of chlorine electrochemistry at anode.Herein,we report a heterostructure of Ni_(3)S_(2)nanoarray with secondary Fe-Ni(OH)_(2)lamellar edges that exposes abundant active sites towards seawater oxidation.The resultant Fe-Ni(OH)_(2)/Ni_(3)S_(2)nanoarray works directly as a free-standing anodic electrode in alkaline artificial seawater.It only requires an overpotential of 269 mV to afford a current density of 10 mA·cm^(-2)and the Tafel slope is as low as 46 m V·dec^(-1).The 27-hour chronopotentiometry operated at high current density of 100 mA·cm^(-2)shows negligible deterioration,suggesting good stability of the Fe-Ni(OH)_(2)/Ni_(3)S_(2)@NF electrode.Faraday efficiency for oxygen evolution is up to〜95%,revealing decent selectivity of the catalyst in saline water.Such desirable catalytic performance could be benefitted from the introduction of Fe activator and the heterostructure that offers massive active and selective sites.The density functional theory(DFT)calculations indicate that the OER has lower theoretical overpotential than Cl_(2) evolution reaction in Fe sites,which is contrary to that of Ni sites.The experimental and theoretical study provides a strong support for the rational design of high-performance Fe-based electrodes for industrial seawater electrolysis. | Baihua Cui Zheng Hu Chang Liu Siliang Liu Fangshuai Chen Shi Hu Jinfeng Zhang Wei Zhou Yida Deng Zhenbo Qin Zhong Wu Yanan Chen Lifeng Cui Wenbin Hu | 2021 | Nano Research2021，14，4： | 7 |
| 15 | Growth ages of ferromanganese crusts from the western and central Pacific:Comparison between nannofossil analysis and ^(10)Be dating显示文摘Based on results of nannofossil analysis and 10Be dating in ferromanganese crusts M1-1 and A1-1 (no nannofossils were found in it),from the western and central Pacific respectively,it is found that the crust growth ages from nannofossil biostrati-graphy agree well with those based on 10Be isotope analysis. Both crusts have three growth layers,and the oldest layer was deposited in Miocene at about 12.80 Ma. The maximum,minimum,and average growth rates of crust A1-1 (from the central Pacific) are 8.11,1.92 and 3.47 mm/Ma,and those of crust M1-1 (from the western Pacific) are 2.93,0.47,and 0.94 mm/Ma. | CHENG Zhenbo SHI Xuefa WU Yonghua SU Xin LI Xiaoyan WANG Kunshan YANG Yongliang GE Shulan JU Xiaohua SHI Fengdeng M. Hiroyuki | 2006 | Chinese Science Bulletin2006，51，24： | 7 |
| 16 | Strain-induced Microstructure Refinement in a Tool Steel Subjected to Surface Mechanical Attrition Treatment显示文摘A nanostructured surface layer has been fabricated on an AISI H13 tool steel by means of surface mechanical attrition treatment (SMAT).Strain-induced refinement processes of ferrite grains and carbide particles have been investigated by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) in the SMAT surface layer.Grain refinement of ferrite is found to be dominated by dislocation activities and greatly facilitated by a large number of carbide particles at a depth >20 μm.The comparisons with microstructure refinement processes in other SMAT ferrite steels indicate that a larger volume fraction of carbide particles with a lower shear strength is expected to facilitate the refinement process of ferrite grains. | Shoudan Lu,Zhenbo Wang and Ke Lu Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China | 2010 | Journal of Materials Science & Technology2010，26，3： | 6 |
| 17 | Quantitative simulation and verification of upgrade law of sustainable development in Beijing-Tianjin-Hebei urban agglomeration显示文摘The natural formation and development of urban agglomerations is a process in which core cities continue to unite their neighboring cities to enhance sustainability for their own sustainable development.The upgrade mechanism of sustainable development urban agglomeration is a nonlinear composite upgrade curve that is a function of time,increasing with the number of cities.In this paper,the sustainable upgrade function curve,upgrade rate,and upgrade speed of urban agglomerations were solved using a geometrical derivation,and the index system for measuring the upgrade capability of sustainable development of urban agglomerations was established.The dynamic change in economic sustainable upgrade capability,social sustainable upgrade capability,environmental sustainable upgrade capability,and comprehensive sustainable upgrade capability of a Beijing-Tianjin-Hebei urban agglomeration from 2000 to 2015 was measured by technique for order preference by similarity to an ideal solution and a grey correlation method,and a comprehensive,intercity unite strength model and a unite threshold calculation method for urban agglomerations were established.The research shows that the economic sustainable upgrade capability,social sustainable upgrade capability,environmental sustainable upgrade capability,and comprehensive sustainable upgrade capability of the Beijing-Tianjin-Hebei urban agglomeration all show a wave-like rising trend.The average annual upgrade speeds during 2000-2015 are,respectively,2.4%.1.67%,1.1%,and 1.74%,with the intercity comprehensive unite strength of urban agglomerations maintaining a general increase;but there is a limit to the joint threshold.From 2000 to 2015,as the core city of the Beijing-Tianjin-Hebei urban agglomeration,Beijing,to enhance its sustainable upgrade capability,jointly developed with Tianjin,Langfang,and Baoding before 2000,Tangshan in 2002,Cangzhou in 2009,Zhangjiakou and Shijiazhuang in 2012,and Chengde in 2014.By 2015,the comprehensive unite strength between Beijing and four cities(Handan,Qinhuangdao,Hengshui,and Xingtai) was still lower than the unite threshold of 6.14.These four cities are relatively far from Beijing,and offer no substantial contribution to the sustainable upgrade capability of Beijing.Through multiple fittings of the upgrade curve using the long-term sequence index of the comprehensive sustainable upgrade capability of Beijing(the core city of the Beijing-Tianjin-Hebei urban agglomeration) from 2000 to 2015,it was found that the simulated curve of the comprehensive sustainable upgrade function of the agglomeration was very similar to the curve of the comprehensive sustainable upgrade capability,which indicates that the simulation results are satisfactory.The future comprehensive sustainable upgrade capability of the agglomeration can be analyzed and predicted by the comprehensive sustainable upgrade function model.This study provides quantitative decision-supporting evidence for promoting the coordinated development of the Beijing-TianjinHebei urban agglomeration and provides theoretical guidance and algorithms for determining the number of cities joined with the sustainable development of national urban agglomerations. | Chuanglin FANG Longwu LIANG Zhenbo WANG | 2019 | Science China Earth Sciences2019，62，12： | 6 |
| 18 | The study on county accessibility in China: Characteristics and effects on population agglomeration显示文摘这份报纸计算了所有县的空间可接近性(城市,城市的区域) 在有费用的中国加权的距离方法。县可接近性的区域部门被进行,并且交通可接近性的关系和人口聚集在这份报纸被讨论。结果显示在中国的县可接近性有主要低的价值和圆层和 reverse-to-natural 坡度的分发结构。在中国在县可接近性和人口密度之间有明显的关联。与这些分析,处于不同交通条件和区域类型的人口移植的内部机制被表明,并且能提供有用建议到地区性的计划,交通计划和在中国的人的聪明的分发。 | WANG Zhenbo XU Jiangang FANG Chuanglin XU Lu QI Yi | 2011 | Journal of Geographical Sciences2011，21，1： | 6 |
| 19 | Geochronology and Petrochemistry of Volcanic Rocks in the Xaignabouli Area, NW Laos显示文摘An integrated study of zircon U-Pb geochronology and petrochemistry, together with zircon Lu-Hf isotopes, has been carried out on the basaltic-andesitic tuff and volcanic breccia from the Nam Hang Formation and andesitic tuff from the Muang-Nan Formation in the Xaignabouli area, which had been mapped as the Permian–Early Triassic on the 1 : 1 000 000 geological map or Late Carboniferous on the 1 : 200 000 geological maps. Zircon U-Pb dating of three samples yielded weighted mean ages of 235±2.6, 232±1.4 and 278±2.8 Ma, respectively, suggesting a Late Triassic origin for the Nam Hang Formation and an Early Permian origin for the Muang-Nan Formation. Geochemically, they are characterized by depletions in HFSEs(e.g., Nb, Ta, Ti) and high LILE/HFSE ratios, and they have positive zircon ε_(Hf)(t) values of 8.7–15.9, which exhibits the continental arc volcanic affinity and partial melting of subducting oceanic slab in the magma source. Combined with spatial occurrence of the volcanic rock and existing geochronological and geochemical data, we suggest that the Xaignabouli-Luang Prabang volcanic belt can be linked to the Loei-Phetchabun belt. The Permian–Triassic volcanic rocks in this belt might be a product of the Nan back-arc basin eastward subduction. | Meifeng Shi Zhenbo Wu Shusheng Liu Zhimin Peng Linnan Guo Fei Nie Siwei Xu | 2019 | Journal of Earth Science2019，30，1： | 6 |
| 20 | Development mechanism of internal local corrosion of X80 pipeline steel显示文摘The occurrence and development mechanism of internal local corrosion has always been a controversial topic,and especially under flow conditions.In this paper,an improved high shear force loop was experimentally used,and local flow field is induced by simulating corrosion defects on the surface of X80 pipeline steel specimens.The characteristics of corrosion products deposited on the surface of specimens in CO2-saturated NACE solution were investigated by means of electrochemical impedance spectroscopy(EIS),scanning electron microscopy(SEM),X-ray diffraction(XRD),and energy dispersive spectrometry(EDS).The 3D micromorphology of the corrosion test surface after remove the corrosion scale used to measure the size of localized corrosion pit.Under the influence of local defects,the wall shear stress(WSS)and turbulent kinetic energy of local flow fields enhanced significantly,and pressure fluctuations in local flow field were induced.The results showed that the characteristics of surface corrosion products varied with flow velocity.The corrosion scales formed in various regions of specimens with defects exhibited different surface micro-morphologies and chemical compositions.Overall,these data offer new perspectives for better understanding the mechanisms behind local corrosion. | Zhuowei Tan Liuyang Yang Dalei Zhang Zhenbo Wang Frank Cheng Mingyang Zhang Youhai Jin | 2020 | Journal of Materials Science & Technology2020，47，14： | 6 |
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