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| 1 | Spatiotemporal characteristics, patterns, and causes of land-use changes in China since the late 1980s显示文摘Land-use/land-cover 变化(LUCC ) 有连接到人和自然相互作用。瓷器 Land-Use/cover 数据集(CLUD ) 从 1980 年代末在 5 年的间隔定期被更新到 2010,与基于 Landsat TMETM+ 图象的标准过程。陆地使用动态区域化方法被建议分析主要陆地使用变换。在国家规模的陆地使用变化的空间与时间的特征,差别,和原因然后被检验。主要调查结果如下被总结。越过中国的陆地使用变化(LUC ) 在最后 20 年(19902010 ) 里在空间、时间的特征显示了一个重要变化。农田变化的区域在南方减少了并且在北方,而是仍然是的全部的区域增加了几乎未改变。回收农田从东北被转移到西北。布满建筑物陆地很快膨胀了,主要在东方被散布,并且逐渐地展开到中央、西方的中国。树林首先减少了,然后增加但是荒芜的区域是反面。草地继续减少。在中国的 LUC 的不同空间模式被发现在之间迟了第 20 世纪并且早第 21 世纪。原版 13 个 LUC 地区在一些地区被边界的变化由 15 个单位代替。包括的这些变化(1 ) 的主要空间特征加速的扩大布满建筑物在 Huang-Huai-Hai 区域,东南的沿海的区域,长江的中流区域,和四川盆登陆;(2 ) 从东北中国和东方内部蒙古在北方转移了陆地开垦到绿洲在西北中国的农业区域;(3 ) 从在到稻的东北中国的喂雨的农田的连续转变回答;并且(4 ) 为在内部蒙古,黄土高原,和西南的多山的区域的南部的农业牧剧的交错群落的格林工程的谷物的有效性。在最后二十年,尽管在北方的气候变化在农田影响了变化,政策规定和经济驱动力仍然是越过中国的 LUC 的主要原因。在第 21 世纪的第一十年期间,在陆地使用模式驾驶了变化的人为的因素从单程的陆地开发转移了强调到开发和保存。动态区域化方法被用来在单位的 zoning 边界,地区的内部特征,和生长和减少的空间模式分析变化。结果揭示了变化过程的模式,也就是 LUC 的过程和在在不同阶段的特征的地区性的差别。地区的生长和减少在这动态 LUC zoning,在统一边界的变化,和在前者和后者十年之间的变化紧张的特征期间被检验。在为在不同类型和陆地使用的不同区域的变化的陆地使用和原因的模式和过程之间的其他的转变的模式被探索。 | LIU Jiyuan KUANG Wenhui ZHANG Zengxiang XU Xinliang QIN Yuanwei NING Jia ZHOU Wancun ZHANG Shuwen LI Rendong YAN Changzhe WU Shixin SHI Xuezheng JIANG Nan YU Dongsheng PAN Xianzhang CHI Wenfeng | 2014 | Journal of Geographical Sciences2014，24，2： | 245 |
| 2 | Numerical simulation and experimental investigation of natural convection heat transfer of molten salt around fine wire显示文摘In order to get the natural convection heat transfer mechanism of molten salt, the experimental investigation of natural convective heat transfer of LiNO3was studied after it was simulated by numerical calculation. Experiment was carried out on the nat-ural convection heat transfer of air and water around the fine wire using the method of Joule heating. The results showed that the natural convection heat transfer of air and water around the fine wire agreed well with Fand's correlation. Based on the aforementioned experiment, the natural convection heat transfer of molten salt LiNO3was studied by experiment and the same results were got. Therefore, the natural convection heat transfer of molten salt can be calculated by Fand's correlation, which takes into consideration the effect of viscosity dissipation. | LU YuanWei LI XiaoLi LI Qiang WU YuTing MA ChongFang | 2013 | Science China(Technological Sciences)2013，56，7： | 13 |
| 3 | Prescribed Performance Finite-Time Tracking Control for Uncertain Nonlinear Systems显示文摘This work investigates the finite-time tracking control problem for a class of uncertain strict-feedback nonlinear systems from a new perspective. First, a novel concept called finite-time performance function (FTPF) is defined. Further, a new sufficien t condition of finite-time st ability is derived and the tracking error can converge to a predefined region within a finite-time interval. The design process of the proposed technique is simpler. Finally, four simulation examples are carried out to illustrate the effectiveness of presented method. | JING Yuanwei LIU Yang ZHOU Shaowei | 2019 | Journal of Systems Science & Complexity2019，32，3： | 11 |
| 4 | Reconfigurable intelligent surfaces for wireless communications:Overview of hardware designs,channel models,and estimation techniques显示文摘The demanding objectives for the future sixth generation(6G)of wireless communication networks have spurred recent research efforts on novel materials and radio-frequency front-end architectures for wireless connectivity,as well as revolutionary communication and computing paradigms.Among the pioneering candidate technologies for 6G belong the reconfigurable intelligent surfaces(RISs),which are artificial planar structures with integrated electronic circuits that can be programmed to manipulate the incoming electromagnetic field in a wide variety of functionalities.Incorporating RISs in wireless networks have been recently advocated as a revolutionary means to transform any wireless signal propagation environment to a dynamically programmable one,intended for various networking objectives,such as coverage extension and capacity boosting,spatiotemporal focusing with benefits in energy efficiency and secrecy,and low electromagnetic field exposure.Motivated by the recent increasing interests in the field of RISs and the consequent pioneering concept of the RIS-enabled smart wireless environments,in this paper,we overview and taxonomize the latest advances in RIS hardware architectures as well as the most recent developments in the modeling of RIS unit elements and RIS-empowered wireless signal propagation.We also present a thorough overview of the channel estimation approaches for RIS-empowered communications systems,which constitute a prerequisite step for the optimized incorporation of RISs in future wireless networks.Finally,we discuss the relevance of the RIS technology in the latest wireless communication standards,and highlight the current and future standardization activities for the RIS technology and the consequent RIS-empowered wireless networking approaches. | Mengnan Jian George C.Alexandropoulos Ertugrul Basar Chongwen Huang Ruiqi Liu Yuanwei Liu Chau Yuen | 2022 | Intelligent and Converged Networks2022，3，1： | 9 |
| 5 | Impacts of ecological restoration projects on agricultural productivity in China显示文摘在农田数量和质量的变化由于陆地使用是国家食物安全的批评担心,特别地为中国。尽管有重要生态的效果,生态的恢复节目(ERP ) ,从 1999 开始了,显然改变了瓷器农田和农业生产率的空间模式。从 2000 ~ 2008 把动态数据基于农田首先与主要生产率建模的 30-m 分辨率和基于卫星的网源于卫星图象,我们在 ERP 引起的农业生产率上识别了影响,包括为格林的谷物,节目(GFGP ) 和到湖(RCTL ) 的回收农田编程序。我们的结果显示农业生产率与 132.67lis 的率输了。在 R 的射击的 Pb 的累积。pseudoacacia 比另外的种类显著地高。在学习区域的土壤的 Pb 的数量是 s 吗?? | QIN Yuanwei YAN Huimin LIU Jiyuan DONG Jinwei CHEN Jingqing XIAO Xiangming | 2013 | Journal of Geographical Sciences2013，23，3： | 8 |
| 6 | WARFARE COMMAND STRATAGEM ANALYSIS FOR WINNING BASED ON LANCHESTER ATTRITION MODELS显示文摘Lanchester 方程和他们的延期广泛地被用来在战争模型计算摩擦。当攻击方面的全部的战斗能力不比保卫方面的优异时,当前的纸为赢处理战争命令决策问题。为这个问题,相应战争命令计策,能转变战场状况,被考虑战争信息因素的影响求婚并且分析份量上。在军事冲突的申请例子证明建议模型和战争的可行性和有效性为赢命令计策。研究结果可以为战争命令决策提供一本理论参考书。 | Xiangyong CHEN Yuanwei JING Chunji LI Mingwei LI | 2012 | Journal of Systems Science and Systems Engineering2012，21，1： | 8 |
| 7 | Natural convection heat transfer of molten salt in a single energy storage tank显示文摘在在一辆柱体坦克的熔融的盐的热转移经由模拟和实验被学习在一辆单个精力存储坦克获得它的自然传送对流热转移。模拟和在一辆柱体坦克的水的自然传送对流热转移与 Garons 关联适合很好的试验性的结果表演。然而,当因为它的高粘性和低热电导率, Garons 关联被用来预言熔融的盐的自然传送对流热转移时,重要偏差发生。然而,熔融的盐的自然传送对流热转移的模仿的数据试验性的结果与那些适合很好。因此,考虑可变物理性质的效果的关联在这研究被建议预言熔融的盐的自然传送对流热转移。从建议关联的现在的数据的偏差是不到 d 控制模拟。在 summe 枼 ? 枼期间?? | LU YuanWei YU Qiang DU WenBin WU YuTing MA ChongFang | 2016 | Science China(Technological Sciences)2016，59，8： | 7 |
| 8 | Approximation law for discrete-time variable structure control systems显示文摘为分离时间的可变结构控制系统滑动模式的二条近似法律被建议克服指数的近似法律和可变的率近似法律的限制。由使用滑动模式 todiscrete 时间变量结构控制系统的建议近似法律,起源的稳定性能被保证,并且沿着切换的表面啁啾由分离时间的可变结构控制引起了能有效地被制止。在近似法律设计,系统控制输入被限制的问题也被考虑,它在实际系统是很重要的。最后,一个模拟例子证明二条近似法律的有效性求婚了。 | Yan ZHENG Yuanwei JING | 2006 | 控制理论与应用(英文版)2006，4，3： | 6 |
| 9 | Mapping paddy rice distribution using multi-temporal Landsat imagery in the Sanjiang Plain, northeast China显示文摘稻米饭分发的信息为食物生产和甲烷排放计算是必要的。基于物候学的算法在由识别唯一的泛滥印射稻稻田被利用了,移植的幼苗用多时间的中等分辨率(到 1 km 的 500 m ) 分阶段执行图象。在这研究,我们开发了简单算法用多时间的 Landsat 形象在地区性的规模在好分辨率识别稻米饭。从 2010-2012 的十六幅 Landsat 图象被用来在 Sanjiang 平原产生 30 m 稻米饭地图,在中国的主要的稻米饭耕作区域的东北 Chinaone。三个植被索引,规范的差别植被索引(NDVI ) ,提高的植被索引(EVI ) ,和陆地表面浇索引(LSWI ) ,被用来在充满 / 移植并且成熟的阶段期间识别稻田。结果的基于 Landsat 的稻米饭地图上的稻米饭的用户和制片人精确性分别地是 90% 和 94% 。基于 Landsat 的稻米饭地图是在国家陆地盖子数据集上的稻米饭层上的改进,它在好决定的图象上通过视觉解释和数字化被产生。农业普查数据实质地少报稻米饭区域,关于它为食物上的研究的使用的涨的严肃的担心安全。 | Cui JIN Xiangming XIAO Jinwei DONG Yuanwei QIN Zongming WANG | 2016 | Frontiers of Earth Science2016，10，1： | 5 |
| 10 | Microstructure and properties of novel Al-Ce-Sc,Al-Ce-Y,Al-Ce-Zr and Al-Ce-Sc-Y alloy conductors processed by die casting,hot extrusion and cold drawing显示文摘In order to overcome the trade-off between the strength and electrical conductivity of aluminum alloy conductors,the new Al-Ce-Sc,Al-Ce-Y,Al-Ce-Zr and Al-Ce-Sc-Y alloys were prepared by die casting,high temperature homogenization treatment,hot extrusion and cold drawing.Adding Sc and Y eliminated the dendrite segregation of the as-cast Al-0.2 Ce alloy and promoted the formation of equiaxed grains with the average grain size of 142.5μm.The Al-0.2 Ce-0.2 Sc-0.1 Y alloy inherited the great tensile properties of Al-0.2 Ce-0.2 Sc alloy and the high electrical conductivity of Al-0.2 Ce-0.1 Y alloy simultaneously.After cold drawing and annealing at 200℃for 5 h,the ultimate tensile strength of Al-0.2 Ce-0.2 Sc-0.1 Y alloy reached 200 MPa and 198 MPa,the elongation reached 6.8%and 8.5%,and the electrical conductivity reached 61.01%and 61.77%,respectively.The main second phase of Al-0.2 Ce-0.2 Sc-0.1 Y alloy after hot extrusion were Al_(13)Fe_3 Ce containing a few Y and Si atoms.The larger size and proportion of the second phase greatly reduced the concentration of solute Fe and Si atoms and the addition of Y significantly decreased the density of defects after cold drawing compared to Al-0.2 Ce-0.2 Sc alloy,which improved electrical conductivity of the alloy.Furthermore,the dispersed and coherent nano-size Al_3 Sc precipitions of Al-0.2 Ce-0.2 Sc-0.1 Y alloy greatly improved strength,elongation and heat resistance.Compared with Al-0.2 Ce-0.2 Sc alloy,the lower density of dislocation,stacking fault and subgrain boundary and the larger size of Al_3 Sc precipitions with enrichment of Y atoms enable the Al-0.2 Ce-0.2 Sc-0.1 Y alloy to maintain high strength,elongation and electrical conductivity after annealing. | Weiyi Wang Qinglin Pan Geng Lin Xiaoping Wang Yuqiao Sun Xiangdong Wang Ji Ye Yuanwei Sun Yi Yu Fuqing Jiang Jun Li Yaru Liu | 2020 | Journal of Materials Science & Technology2020，58，23： | 4 |
| 11 | Space-confined growth of monolayer ReSe2 under a graphene layer on Au foils显示文摘Vertical heterostructures based on two-dimensional(2D)materials have attracted widespread interest for their numerous applications in electronic and optoelectronic devices.Herein,we report the direct construct!on of an abnormal graphene/ReSe2 stack on Au foils by a two-step chemical vapor deposition(CVD)strategy.During the second growth stage,mono layer ReSe2 is found to prefere ntially evolve at the irUerface between the first-grown graphene layer and the Au substrate.The unusual stacking behavior is unraveled by in-situ'cutting open'the upper graphene from the defects to expose the lower ReSe2 using scanning tunneling microscopy(STM).From combination of these results with density functional theory calculations,the domain boundaries and edge sites of graphene are proposed to be adsorption sites for Re and Se precursors,further facilitating the growth of ReSe2 at the van der Waals gap of graphene/Au.This work hereby offers an intriguing strategy for obtaining vertical 2D heterostructures featured with an ultra-clean interface and a designed stacking geometry. | Chunyu Xie Shaolong Jiang Xiaolong Zou Yuanwei Sun Liyun Zhao Min Hong Shulin Chen Yahuan Huan Jianping Shi Xiebo Zhou Zhepeng Zhang Pengfei Yang Yuping Shi Porun Liu Qing Zhang Peng Gao Yanfeng Zhang | 2019 | Nano Research2019，12，1： | 4 |
| 12 | Effects of yttrium and phosphorus on growth and physiological characteristics of Microcystis aeruginosa显示文摘Yttrium is a main kind of rare earth elements(REEs) with wide applications in modern industry and farming. Phosphorus, an essential element of algae, is used as the nutrients and also one of the main factors of eutrophication. To investigate the effects of yttrium and phosphorus on Microcystis aeruginosa(M. aeruginosa), the growth and physiological changes were studied by lab cultured experiments. In the experiment, exogenous yttrium was tested by a concentration gradient(0.0, 0.1, 0.3, 0.5, 1.0 mg/L),meanwhile, phosphorus was tested by three concentrations(0.0, 0.02, 0.2 mg/L). The results show that the contents of chlorophyll a(chl-a) and soluble protein increase compared with the control and they have certain correlation with algal cells density. The growth status of algae is stimulated by initial yttrium concentration <0.3 and 0.2 mg/L phosphorus, while it is inhabited by 0.5 and 1.0 mg/L yttrium. Besides,the activity of superoxide dismutase(SOD) of algae increases with addition of yttrium dose(0-0.3 mg/L)when phosphorus dose is 0.2 mg/L. Furthermore, when yttrium dose is 0.5 and 1.0 mg/L, the vitality of SOD presents a sharp decline. The malondialdehyde(MDA) contents increase with time and addition of yttrium dose, 0.2 mg/L phosphorus weakens the accumulation of MDA. | Yingjun Wang Yuanwei Li Xiaoyu Luo Yin'an Ren En'guang Gao Haojie Gao | 2018 | Journal of Rare Earths2018，36，7： | 4 |
| 13 | Enhancement for φ-OTDR Performance by Using Narrow Linewidth Light Source and Signal Processing显示文摘以便基于阶段敏感的光时间域反射计提高一个分布式的声学的察觉到系统的 signal-to-noise-ratio (我们建议了的 -OTDR), 分割的 unwrapping 算法,阶段差别的平均评价,和过滤方法的无限的推动反应(IIR ) 的联合。信号质量的改进数字地被表明。而且,我们学习了影响在 -OTDR 表演上源于轻来源噪音。结果看了那在 -OTDR 系统使用的轻来源的线宽什么时候更狭窄,系统的表演更好。简言之,当更狭窄的线宽光来源被选择,平均评价阶段差别的方法被使用时,如此的一个 -OTDR 系统能获得高质量的使解调的信号。 | Meng ZHANG Song WANG Yuanwei ZHENG Yao YANG Xingjie SA Li ZHANG | 2016 | Photonic Sensors2016，6，1： | 3 |
| 14 | Flexible Operation Mode of Coal-fired Power Unit Coupling with Heat Storage of Extracted Reheat Steam显示文摘In order to provide more grid space for the renewable energy power,the traditional coal-fired power unit should be operated flexibility,especially achieved the deep peak shaving capacity.In this paper,a new scheme using the reheat steam extraction is proposed to further reduce the load far below 50%rated power.Two flexible operation modes of increasing power output mode and reducing fuel mode are proposed in heat discharging process.A 600 MW coal-fired power unit with 50%rated power is chosen as the research model.The results show that the power output is decreased from 300.03 MW to 210.07 MW when the extracted reheat steam flow rate is 270.70 t·h^(-1),which increases the deep peak shaving capacity by 15%rated power.The deep peak shaving time and the thermal efficiency are 7.63 h·d^(-1)and 36.91%respectively for the increasing power output mode,and they are 7.24 h·d^(-1)and 36.58%respectively for the reducing fuel mode.The increasing power output mode has the advantages of higher deep peak shaving time and the thermal efficiency,which is recommended as the preferred scheme for the flexible operation of the coal-fired power unit. | WEI Haijiao LU Yuanwei YANG Yanchun ZHANG Cancan WU Yuting LI Weidong ZHAO Dongming | 2022 | Journal of Thermal Science2022，31，2： | 3 |
| 15 | Evaluating the safety of high arch dams with fractures based on numerical simulation and geomechanical model testing显示文摘It is important to estimate the probability of fracture extension and its impact on the safety of arch dams with fractures. Numerical simulation and geomechanical model test were combined to evaluate the overall stability and the extension probability of fractures. Numerical simulation forecasted the dam displacement and the operating behavior based on the parameters obtained from the back analysis. Geomechanical model test was based on small block masonry and the models with or without fractures were both tested. The results show that the deformation of dams is in line with general rules at a normal water load and the extension probability of the existing fractures is very small, which has no significant impact on the global stability of dams. Moreover, the failure process of arch dams with the existing fractures in dams at overload scenarios is similar to the one without the embedded fractures, i.e., the failure crack which is not caused by the existing fractures inside comes into being on the surface of dams itself. | HE Zhu LIU YaoRu PAN YuanWei YANG Qiang | 2015 | Science China(Technological Sciences)2015，58，10： | 3 |
| 16 | Experimental study of single-row chevron-jet impingement heat transfer on concave surfaces with different curvatures显示文摘To address the curvature effect on single-row chevron-nozzle jet impingement heat transfer on concave surface,a series of experiments are conducted in the present investigation.Four concave surfaces including one semi-cylindrical concave surface and three parabolic concave surfaces with different width-to-depth ratios are tested under three typical Reynolds numbers(Re=5000,10000 and 15000)and several dimensionless nozzle-to-surface distances ranging from 1 to 8.The results show that the concave curvature has a clear impact on chevron-nozzle jet impingement heat transfer,tightly dependent on jet Reynolds number and impinging distance.In general,the semicylindrical concave surface produces the highest longitudinally-averaged Nusselt number at the leading line of concave surface.Under a low jet Reynolds number,the parabolic concave surface with a highly curved curvature produces higher longitudinally-averaged Nusselt number at the leading line and more uniform longitudinally-averaged Nusselt number distribution along the curvilinear direction.However,the longitudinally-averaged Nusselt number at the leading line of concave surface is the lowest for the highly curved surface under a high jet Reynolds number and large impinging distance.In comparison with the round-nozzle,chevron nozzle plays a more significant role on improving jet impingement heat transfer at small impinging distances. | Yuanwei LYU Jingzhou ZHANG Xichen LIU Yong SHAN | 2019 | Chinese Journal of Aeronautics2019，32，10： | 3 |
| 17 | Quantitative behavior of vibrational excitation in AC plasma assisted dry reforming of methane显示文摘Quantitative behavior of non-equilibrium excitation by direct electron impact in low-temperature dry reforming of methane was investigated by integrated studies of experimental validation and kinetic modeling.A plasma chemistry kinetic mechanism incorporating the reactions involving vibrational excitation of CH4,CO2,H2 and CO molecules as well as the low temperature He/CH4/CO2 conversion pathways was developed and validated.The calculation results showed that at lower E/N values(<150 Td)large population of energized electrons generated in a He/CH4/CO2 discharge resulted in an intensification of vibrational excitation.Despite the large generation of vibration,the vibrationally excited molecules in a 0.5/0.25/0.25 of He/CH4/CO2 discharge mixture were easy to relax,due to the strong coupling of the vibration of different molecules in a gas mixture.The results showed that the moderate levels of the vibrational excitation,such as CO2(v10,11,...,18)and CO(v9,10),presented most efficient in the stimulation of species generation including CO,CH2 O,CH3 OH,C2 H4 and C2 H6.Specifically,under conditions of E/N of 108 Td,14.9%of CO formation was estimated from the recombination of CO2(v)with CH3 and H,CO2(v)+CH3→CH3 O+CO,CO2(v)+H→CO+OH.Also,4.8%of C2 H4 formation was from the recombination reaction CH4(v)+CH→C2 H4+H.These results highlight the strong roles of vibrational states in a complex plasma chemistry system. | Jintao Sun Qi Chen Yuanwei Guo Zili Zhou Yang Song | 2020 | Journal of Energy Chemistry2020，29，7： | 3 |
| 18 | Comparison of surface water extraction performances of different classic water indices using OLI and TM imageries in different situations显示文摘Recently,water extraction based on the indices method has been documented in many studies using various remote sensing data sources.Among them,Landsat satellites data have certain advantages in spatial resolution and cost.After the successful launch of Landsat 8,the Operational Land Imager(OLI)data from the satellite are getting more and more attention because of its new improvements.In this study,we used the OLI imagery data source to study the water extraction performance based on the Normalized Difference Vegetation Index,Normalized Difference Water Index,Modified Normalized Water Index(MNDWI),and Automated Water Extraction Index(AWEI)and compared the results with the Thematic Mapper(TM)imagery data.Two test sites in Tianjin City of north China were selected as the study area to verify the applicability of OLI data and demonstrate its advantages over TM data.We found that the results of surface water extraction based on OLI data are slightly better than that based on TM in the two test sites,especially in the city site.The AWEI and MNDWI indices performs better than the other two indices,and the thresholds of water indices show more stability when using the OLI data.So,it is suitable to combine OLI imagery with other Landsat sensor data to study water changes for long periods of time. | Ke ZHAI Xiaoqing WU Yuanwei QIN Peipei DU | 2015 | Geo-Spatial Information Science2015，18，1： | 2 |
| 19 | Improvement of corrosion resistance of AZ91D magnesium alloy by holmium addition显示文摘 | Xuehua Zhou Yuanwei Huang Zhongling Wei Qiurong Chen Fuxing Gan | 2006 | Corrosion Science2006，，12： | 1 |
| 20 | An indoor mobile localization strategy for robot in NLOS environment 显示文摘 | Yan Wang Yuanwei Jing and Zixi Jia | 2013 | Intemational Journal of Distributed Sensor Networks2013，，： | 1 |
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