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| 1 | Mapping wetland changes in China between 1978 and 2008显示文摘Four wetland maps for all China have been produced,based on Landsat and CBERS-02B remote sensing data between 1978 and 2008 (1978,1990,2000 and 2008).These maps were mainly developed by manual interpretation and validated by substantial field investigation in 2009.Based on these maps,we analyzed the 2008 wetland distribution in China and discussed wetland changes and their drivers over the past 30 years.(i) There were about 324097 km 2 of wetlands in 2008,for which inland marshes or swamps were the most common wetland type (35%),with lakes (26%) second.Most of the wetlands were in Heilongjiang,Inner Mongolia,Qinghai and Tibet,occupying about 55% of the national wetland area.(ii) From 1978 to 2008,China's wetland area continually and significantly decreased,by about 33% based on changes in the wetland map.This was in sharp contrast to the increase in artificial wetlands,which increased by about 122%.Inland marshes accounted for the main loss of total wetlands from 1978 to 2000.From 2000 through 2008,riverine and lacustrine wetlands constituted the main wetland loss.Fortunately however,the rate of wetland loss decreased from 5523 to 831 km 2 /a.(iii) The change ratio of lost natural wetlands (including inland and coastal wetlands) to non-wetlands has decreased slightly over the past 30 years.From 1978 to 1990,nearly all natural wetlands (98%) lost were transformed into non-wetlands.However,the ratio declined to 86% from 1990 to 2000,and to 77% from 2000 to 2008.(iv) All Chinese provinces were divided into three groups according to patterns of wetland changes,which could relate to the driving forces of such changes.Tibet was completely different from other provinces,as it was one representative example in which there was a net wetland increase,because of global warming and decreased human activity since 1990.Increased economic development caused considerable wetland loss in most eastern provinces,and artificial wetlands increased. | NIU ZhenGuo ZHANG HaiYing WANG XianWei YAO WenBo ZHOU DeMin ZHAO KuiYi ZHAO Hui LI NaNa HUANG HuaBing LI CongCong YANG Jun LIU CaiXia LIU Shuang WANG Lin LI Zhan YANG ZhenZhong QIAO Fei ZHENG YaoMin CHEN YanLei SHENG YongWei GAO XiaoHong ZHU WeiHong WANG WenQing WANG Hong WENG YongLing ZHUANG DaFang LIU JiYuan LUO ZhiCai CHENG Xiao GUO ZiQi GONG Peng | 2012 | Chinese Science Bulletin2012，57，22： | 51 |
| 2 | Regional Disparity and Convergence of China's Inbound Tourism Economy显示文摘Comprehending regional characteristics and influencing factors of China's inbound tourism economy is im-portant to make effective policies that will help inbound tourism develop harmoniously and shrink regional disparity.This paper studied the regional disparity and convergence of China's inbound tourism economy during 1996-2008 with the methods of σ-convergence,club convergence and β-convergence.The results indicate that 1) inbound tourism receipts per capita(ITRPC) of the whole country,the eastern,central and western regions presented the rapid increas-ing trend;2) ITRPC of the whole country was characterized by convergence;3) the eastern region presented club con-vergence,but the central and western regions did not show this trend;4) the star-hotel levels and investment in fixed assets for the tourism industry per capita had a same trend to growth rates of ITRPC,promoting inbound tourism de-velopment,and there was no difference among the 31 provinces(municipalities) in the mainland of China;5) but the proportion of employed persons in the tourism industry accounting for total population and the proportion of the terti-ary industry accounting for GDP had a reversal trend to growth rates of ITRPC,shrinking the provincial disparity in inbound tourism economy,and there were differences between the developed provinces and the developing provinces.Based on these analyses,we put forward some suggestions for the developing provinces to speed up inbound tourism economy. | WANG Shuxin HE Yuanqing WANG Xueding ZHU Guofeng CAO Weihong | 2011 | Chinese Geographical Science2011，21，6： | 40 |
| 3 | A review of topology optimization for additive manufacturing:Status and challenges显示文摘Topology optimization was developed as an advanced structural design methodology to generate innovative lightweight and high-performance configurations that are difficult to obtain with conventional ideas.Additive manufacturing is an advanced manufacturing technique building asdesigned structures via layer-by-layer joining material,providing an alternative pattern for complex components.The integration of topology optimization and additive manufacturing can make the most of their advantages and potentials,and has wide application prospects in modern manufacturing.This article reviews the main content and applications of the research on the integration of topology optimization and additive manufacturing in recent years,including multi-scale or hierarchical structural optimization design and topology optimization considering additive manufacturing constraints.Meanwhile,some challenges of structural design approaches for additive manufacturing are discussed,such as the performance characterization and scale effects of additively manufactured lattice structures,the anisotropy and fatigue performance of additively manufactured material,and additively manufactured functionally graded material issues,etc.It is shown that in the research of topology optimization for additive manufacturing,the integration of material,structure,process and performance is important to pursue high-performance,multi-functional and lightweight production.This article provides a reference for further related research and aerospace applications. | Jihong ZHU Han ZHOU Chuang WANG Lu ZHOU Shangqin YUAN Weihong ZHANG | 2021 | Chinese Journal of Aeronautics2021，34，1： | 33 |
| 4 | Secondary organic carbon quantification and source apportionment of PM_(10) in Kaifeng, China显示文摘During 2005, the filter samples of ambient PM10 from five sites and the source samples of particulate matter were collected in Kaifeng, Henan Province of China. Nineteen elements, water-soluble ions, total carbon (TC) and organic carbon (OC) contained in samples were analyzed. Seven contributive source types were identified and their contributions to ambient PM10 were estimated by chemical mass balance (CMB) receptor model. Weak associations between the concentrations of organic carbon and element carbon (EC) were observed during the sampling periods, indicating that there was secondary organic aerosol pollution in the urban atmosphere. An indirect method of 'OC/EC minimum ratio' was applied to estimate the concentration of secondary organic carbon (SOC). The results showed that SOC contributed 26.2%, 32.4% and 18.0% of TC in spring, summer-fall and winter, respectively, and the annual average SOC concentration was 7.07 μg/m3, accounting for 5.73% of the total mass in ambient PM10. The carbon species concentrations in ambient PM10 were recalculated by subtracting SOC concentrations from measured concentrations of TC and OC to increase the compatibility of source and receptor measurements for CMB model. | WU Lin FENG Yinchang WU Jianhui ZHU Tan BI Xiaohui HAN Bo YANG Weihong YANG Zhiqiang | 2009 | Journal of Environmental Sciences2009，21，10： | 26 |
| 5 | Aggregation-induced emission: a coming-of-age ceremony at the age of eighteen显示文摘Aggregation-induced emission(AIE) has drawn great attention worldwide for its unique optical phenomenon and huge potential applications. Since coined by Ben Zhong Tang et al. in 2001, AIE has been deeply investigated and widely utilized in many important areas, such as organic light-emitting diode(OLED), sensor, and bio-imaging. Herein, we highlight some important progress of AIE in these eighteen years, including the exploration of internal mechanism and potential applications. Furthermore,some other interestingly emissive behaviors, originating but distinguishing from the AIE concept, are presented. It is anticipated an overall understanding about AIE could be easily caught from this short review for scientists, no matter whether they are involved in this exciting and rising research area or not. | Jie Yang Zhenguo Chi Weihong Zhu Ben Zhong Tang Zhen Li | 2019 | Science China Chemistry2019，62，9： | 25 |
| 6 | The variation in soil moisture and the appropriate groundwater table for desert riparian forest along the Lower Tarim River显示文摘基于在五年监视更低的 Tarim 河收集的数据,我们由使用变化(Cv ) 的系数的方法分析了土壤潮湿内容(SMC ) 和在 SMC,地下水表格深度(GWD ) 和植被之间的关系的可变性,皮尔森关联和回归。SMC 的可变性的结果显示它随 060 厘米的土壤层的土壤层 SMC 的深度的增加升起了与在在可变性显示出重要增加的 100260 厘米的土壤层的 SMC 相比是相对小的。SMC 和 GWD 在生态的水消遣在 Yingsu 横断和它水路的附近的地点展出了重要差别前后,特别在 100260 厘米的土壤层的 SMC 与 GWD 的重要上升显著地增加了并且在大约 4 m 的 GWD 到达了最大的价值。显著地随 100260 厘米的土壤层的 SMC 的增加改进的植物范围和种类差异,他们俩接近了最大的价值,当 SMC 是时, 92.3% 主要植物种类能成长 >10% 。沿着更低的 Tarim 河恢复荒芜的河边的森林的生态系统, GWD 必须被维持在 < 在水路并且在为这个干旱区域的其余部分的大约 4 m 的附近的 4 m。 | MA Xiaodong CHEN Yaning ZHU Chenggang LI Weihong | 2011 | Journal of Geographical Sciences2011，21，1： | 23 |
| 7 | How would global-mean temperature change in the 21st century?显示文摘The time series of HadCRUT3 global-mean surface air temperature(GSAT) anomaly,Pacific decadal oscillation(PDO) index,and the equatorial Pacific sea surface temperature(SST) were utilized,and their long-term trends and multiple time-scale periodic oscillations were explored in this study.A long-term trend with a warming rate about 0.44°C /century during 1850-2008,two cool floors occurred respectively around 1910 and during 1950-1970,and three warm flats happened in the 1870s,1940s and since the year 1998 were found in the GSAT.In this duration,the variability of GSAT can be well reconstructed by the quasi-21-year,the quasi-65-year,and century-scale oscillations.The recent decadal warm flat is caused by their positive phase overlapping from these three oscillations.The maximum rising temperature reached 0.26°C was simulated in 2004 by the three oscillations.The quasi-21-year and the quasi-65-year oscillations were possibly caused by solar radiation and internal variability of the ocean-atmosphere system.Therefore,an outlook of GSAT for the 21st century was made based on the long-term trend and these three oscillations.It was expected that a cool floor and a warm flat of the GSAT would appear in the 2030s and 2060s,respectively.However,the highest warming range is predicted about 0.6°C,it is less than the threshold 2°C and IPCC projection. | QIAN WeiHong LU Bo ZHU CongWen | 2010 | Chinese Science Bulletin2010，55，19： | 20 |
| 8 | Precise nanomedicine for intelligent therapy of cancer显示文摘Precise nanomedicine has been extensively explored for efficient cancer imaging and targeted cancer therapy, as evidenced by a few breakthroughs in their preclinical and clinical explorations. Here, we demonstrate the recent advances of intelligent cancer nanomedicine, and discuss the comprehensive understanding of their structure-function relationship for smart and efficient cancer nanomedicine including various imaging and therapeutic applications, as well as nanotoxicity. In particular, a few emerging strategies that have advanced cancer nanomedicine are also highlighted as the emerging focus such as tumor imprisonment, supramolecular chemotherapy, and DNA nanorobot. The challenge and outlook of some scientific and engineering issues are also discussed in future development. We wish to highlight these new progress of precise nanomedicine with the ultimate goal to inspire more successful explorations of intelligent nanoparticles for future clinical translations. | Huabing Chen Zhanjun Gu Hongwei An Chunying Chen Jie Chen Ran Cui Siqin Chen Weihai Chen Xuesi Chen Xiaoyuan Chen Zhuo Chen Baoquan Ding Qian Dong Qin Fan Ting Fu Dayong Hou Qiao Jiang Hengte Ke Xiqun Jiang Gang Liu Suping Li Tianyu Li Zhuang Liu Guangjun Nie Muhammad Ovais Daiwen Pang Nasha Qiu Youqing Shen Huayu Tian Chao Wang Hao Wang Ziqi Wang Huaping Xu Jiang-Fei Xu Xiangliang Yang Shuang Zhu Xianchuang Zheng Xianzheng Zhang Yanbing Zhao Weihong Tan Xi Zhang Yuliang Zhao | 2018 | Science China Chemistry2018，61，12： | 19 |
| 9 | Multi-scale design and optimization for solid-lattice hybrid structures and their application to aerospace vehicle components显示文摘By integrating topology optimization and lattice-based optimization,a novel multi-scale design method is proposed to create solid-lattice hybrid structures and thus to improve the mechanical performance as well as reduce the structural weight.To achieve this purpose,a two-step procedure is developed to design and optimize the innovative structures.Initially,the classical topology optimization is utilized to find the optimal material layout and primary load carrying paths.Afterwards,the solid-lattice hybrid structures are reconstructed using the finite element mesh based modeling method.And lattice-based optimization is performed to obtain the optimal crosssection area of the lattice structures.Finally,two typical aerospace structures are optimized to demonstrate the effectiveness of the proposed optimization framework.The numerical results are quite encouraging since the solid-lattice hybrid structures obtained by the presented approach show remarkably improved performance when compared with traditional designs. | Chuang WANG Jihong ZHU Manqiao WU Jie HOU Han ZHOU Lu MENG Chenyang LI Weihong ZHANG | 2021 | Chinese Journal of Aeronautics2021，34，5： | 14 |
| 10 | Estimation of net primary productivity and its driving factors in the Ili River Valley,China显示文摘Net primary productivity(NPP), as an important variable and ecological indicator in grassland ecosystems, can reflect environmental change and the carbon budget level. The Ili River Valley is a wetland nestled in the hinterland of the Eurasian continent, which responds sensitively to the global climate change. Understanding carbon budget and their responses to climate change in the ecosystem of Ili River Valley has a significant effect on the adaptability of future climate change and sustainable development. In this study, we calculated the NPP and analyzed its spatio-temporal pattern of the Ili River Valley during the period 2000–2014 using the normalized difference vegetation index(NDVI) and an improved Carnegie-Ames-Stanford(CASA) model. Results indicate that validation showed a good performance of CASA over the study region, with an overall coefficient of determination(R2) of 0.65 and root mean square error(RMSE) of 20.86 g C/(m^2·a). Temporally, annual NPP of the Ili River Valley was 599.19 g C/(m^2·a) and showed a decreasing trend from 2000 to 2014, with an annual decrease rate of –3.51 g C/(m^2·a). However, the spatial variation was not consistent, in which 55.69% of the areas showed a decreasing tendency, 12.60% of the areas remained relatively stable and 31.71% appeared an increasing tendency. In addition, the decreasing trends in NPP were not continuous throughout the 15-year period, which was likely being caused by a shift in climate conditions. Precipitation was found to be the dominant climatic factor that controlled the inter-annual variability in NPP. Furthermore, the correlations between NPP and climate factors differed along the vertical zonal. In the medium-high altitudes of the Ili River Valley, the NPP was positively correlated to precipitation and negatively correlated to temperature and net radiation. In the low-altitude valley and high-altitude mountain areas, the NPP showed a negative correlation with precipitation and a weakly positive correlation with temperature and net radiation. The results suggested that the vegetation of the Ili River Valley degraded in recent years, and there was a more complex mechanism of local hydrothermal redistribution that controlled the growth of vegetation in this valley ecosystem. | JIAO Wei CHEN Yaning LI Weihong ZHU Chenggang LI Zhi | 2018 | Journal of Arid Land2018，10，5： | 9 |
| 11 | Shape optimization of 3D curved slots and its application to the squirrel-cage elastic support design显示文摘The squirrel-cage elastic support is one of the most important components of an aero-engine rotor system.A proper structural design will favor the static and dynamic performances of the system.In view of the deficiency of the current shape optimization techniques,a new mapping approach is proposed to define shape design variables based on the parametric equations of 3D curves and surfaces.It is then applied for the slot shape optimization of a squirrel-cage elastic support.To this end,an automatic design procedure that integrates the Genetic Algorithm (GA) is developed to solve the problem.Two typical examples with different shape constraints are considered.Numerical results provide reasonable optimum designs for the improvement of stiffness and strength of the squirrel-cage elastic support. | WANG Dan,ZHANG WeiHong*,WANG ZhenPei & ZHU JiHong Engineering Simulation and Aerospace Computing,The Key Laboratory of Contemporary Design & Integrated Manufacturing Technology,Northwestern Polytechnical University,Xi’an 710072,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，10： | 8 |
| 12 | Probing CENP-E function in chromosome dynamics using small molecule inhibitor syntelin显示文摘 | Xia Ding Feng Yan Phil Yao Zhihong Yang Weihong Wan Xiwei Wang Jing Liu Xinjiao Gao Ariane Abrieu Tongge Zhu Jiancun Zhang Zhen Dou Xuebiao Yao | 2010 | Cell Research2010，20，12： | 8 |
| 13 | Self-assembled multifunctional DNA nanoflowers for the circumvention of multidrug resistance in targeted anticancer drug delivery显示文摘癌症化疗被它的副作用和 multidrug 抵抗(MDR ) 限制了。因此,指向了能围绕 MDR 的药交货系统被需要。这里,我们向 chemosensitive 和在白血病和乳癌房间模型围绕了 MDR 的 MDR 癌症房间为指向的药交货汇报多功能的 DNA nanoflowers (NF ) 。NF 经由卷圆复制, NF 为特定的癌症房间识别,为 bioimaging 的 fluorophores,和 doxorubicin (纪录影片) 用 aptamers 在期间被合并产生的 DNA 和镁焦磷酸盐的潜在的一起沉淀是自我装配的为药交货的有约束力的 DNA。NF 尺寸是悦耳的(在直径击倒 nm 到 200 ) ,并且浓密地包装的药绑定主题和多孔的 intrastructures 赋予 NF 以一个高装载药的能力(71.4% , wt/wt ) 。尽管 Doxloaded NF (NF 纪录影片) 在生理的 pH 是稳定的,药版本在酸或基本的条件下面被便于。NF 交付纪录影片进目标 chemosensitive 和 MDR 癌症房间,阻止药流出并且提高在 MDR 房间的药保留。NF 纪录影片在两个目标 chemosensitive 房间和 MDR 房间,然而并非在 nontarget 房间导致有势力 cytotoxicity,并发地因此围绕 MDR 并且减少副作用。总的来说,这些 NF 为在指向的癌症治疗围绕 MDR 正在答应工具。 | Lei Mei Guizhi Zhu Liping Qiu Cuichen Wu Huapei Chen Hao Liang Sena Cansiz Yifan Lv Xiaobing Zhang Weihong Tan | 2015 | Nano Research2015，8，11： | 8 |
| 14 | Metabolic engineering of Streptomyces coelicolor for enhanced prodigiosins (RED) production显示文摘Bacterial prodigiosins are red-colored secondary metabolites with multiple activities,such as anticancer,antimalarial and immunosuppressive,which hold great potential for medical applications.In this study,dramatically enhanced prodigiosins(RED) production in Streptomyces coelicolor was achieved by combinatorial metabolic engineering,including inactivation of the repressor gene ohkA,deletion of the actinorhodin(ACT) and calcium-dependent antibiotic(CDA) biosynthetic gene clusters(BGCs) and multi-copy chromosomal integration of the RED BGC.The results showed that ohkA deletion led to a 1-fold increase of RED production over the wild-type strain M145.Then,the ACT and CDA BGCs were deleted successively based on the AohkA mutant(SBJ101).To achieve multi-copy RED BGC integration,artificial ΦC31 attB site(s) were inserted simultaneously at the position where the ACT and CDA BGCs were deleted.The resulting strains SBJ102(with a single deletion of the ACT BGC and insertion of one artificial attB site) and SBJ103(with the deletion of both BGCs and insertion of two artificial attB sites) produced 1.9-and 6-fold higher RED titers than M145,respectively.Finally,the entire RED BGC was introduced into mutants from SBJ101 to SBJ103,generating three mutants(from SBJ104 to SBJ106) with chromosomal integration of one to three copies of the RED BGC.The highest RED yield was from SBJ106,which produced a maximum level of 96.8 mg g^(-1) cell dry weight,showing a 12-fold increase relative to M145.Collectively,the metabolic engineering strategies employed in this study are very efficient for the construction of high prodigiosin-producing strains. | Panpan Liu Hong Zhu Guosong Zheng Weihong Jiang Yinhua Lu | 2017 | Science China(Life Sciences)2017，60，9： | 7 |
| 15 | Reconstructed index of summer monsoon dry-wet modes in East Asia for the last millennium显示文摘Monthly precipitation datasets collected at 160 stations in China as well as the monthly winds and humidity data derived from the US National Centers for Environmental Prediction (NCEP) were used to construct the relationship between six summer dry-wet modes in eastern China and the summer monsoon airflow northward advance in East Asia. A millennial series of the monsoon dry-wet index (MDWI) was reconstructed based on Wang's six summer dry-wet modes in eastern China since 950 AD. A high (low) index indicates that the strong (weak) East Asian summer monsoon airflow can reach northern (southern) China and cause above (below) normal precipitation. Interdecadal periodic variations, such as the approximate 70-year oscillation, can be found in the MDWI series. In the last millennium, northern China has experienced persistent decadal wet periods and persistent decadal dry periods. At present, the MDWI is a low period on the interdecadal time scale so above-normal precipitation is observed in southern China and below-normal precipitation in northern China. | QIAN WeiHong ZHU YaFen TANG ShuaiQi | 2011 | Chinese Science Bulletin2011，56，28： | 6 |
| 16 | Impacts of Land Cover Changes on Ecosystem Carbon Stocks Over the Transboundary Tumen River Basin in Northeast Asia显示文摘Understanding the effects of land cover changes on ecosystem carbon stocks is essential for ecosystem management and environmental protection, particularly in the transboundary region that has undergone marked changes. This study aimed to examine the impacts of land cover changes on ecosystem carbon stocks in the transboundary Tumen River Basin(TTRB). We extracted the spatial information from Landsat Thematic Imager(TM) and Operational Land Imager(OLI) images for the years 1990 and 2015 and obtained convincing estimates of terrestrial biomass and soil carbon stocks with the InVEST model. The results showed that forestland, cropland and built-up land increased by 57.5, 429.7 and 128.9 km2, respectively, while grassland, wetland and barren land declined by 24.9, 548.0 and 43.0 km2, respectively in the TTRB from 1990 to 2015. The total carbon stocks encompassing aboveground, belowground, soil and litter layer carbon storage pools have declined from 831.48 Tg C in 1990 to 831.42 Tg C in 2015 due to land cover changes. In detail, the carbon stocks decreased by 3.13 Tg C and 0.44 Tg C in Democratic People's Republic of Korea(North Korea) and Russia, respectively, while increased by 3.51 Tg C in China. Furthermore, economic development, and national policy accounted for most land cover changes in the TTRB. Our results imply that effective wetland and forestland protection policies among China, North Korea, and Russia are much needed for protecting the natural resources, promoting local ecosystem services and regional sustainable development in the transnational area. | XIANG Hengxing JIA Mingming WANG Zongming LI Lin MAO Dehua ZHANG Da CUI Guishan ZHU Weihong | 2018 | Chinese Geographical Science2018，28，6： | 6 |
| 17 | Structural topology optimization: Extensibility and attainability显示文摘Extensibility and attainability of topology optimization are discussed by investigating a variety of simultaneous topology opti-mization methods extended from the standard formulation.First,the state of the art is highlighted through systematic classification of developed methods,such as simultaneous topology optimizations of microstructure and macrostructure,structure and supports,structure and design-dependent loads,structure and locations of involved components.Second,some recent results about simultaneous topology optimization of structure and applied loads are presented.It is shown that the simultaneous topology optimization is an integrated methodology that extends the concept of standard topology optimization in the sense of systematic design.The presence of more than one kind of design variable of different nature makes the optimization problem complex but enlarges the design space to attain the optimization. | ZHANG WeiHong ZHANG ZhiDong ZHU JiHong GAO Tong | 2014 | Science China(Technological Sciences)2014，57，7： | 6 |
| 18 | Impact of land use/cover changes on carbon storage in a river valley in arid areas of Northwest China显示文摘Soil carbon pools could become a CO_2 source or sink, depending on the directions of land use/cover changes. A slight change of soil carbon will inevitably affect the atmospheric CO_2 concentration and consequently the climate. Based on the data from 127 soil sample sites, 48 vegetation survey plots, and Landsat TM images, we analyzed the land use/cover changes, estimated soil organic carbon(SOC) storage and vegetation carbon storage of grassland, and discussed the impact of grassland changes on carbon storage during 2000 to 2013 in the Ili River Valley of Northwest China. The results indicate that the areal extents of forestland, shrubland, moderate-coverage grassland(MCG), and the waterbody(including glaciers) decreased while the areal extents of high-coverage grassland(HCG),low-coverage grassland(LCG), residential and industrial land, and cultivated land increased. The grassland SOC density in 0–100 cm depth varied with the coverage in a descending order of HCG>MCG>LCG.The regional grassland SOC storage in the depth of 0–100 cm in 2013 increased by 0.25×1011 kg compared with that in 2000. The regional vegetation carbon storage(S_(rvc)) of grassland was 5.27×10~9 kg in2013 and decreased by 15.7% compared to that in 2000. The vegetation carbon reserves of the under-ground parts of vegetation(S_(ruvb)) in 2013 was 0.68×10~9 kg and increased by approximately 19.01%compared to that in 2000. This research can improve our understanding about the impact of land use/cover changes on the carbon storage in arid areas of Northwest China. | YANG Yuhai LI Weihong ZHU Chenggang WANG Yang HUANG Xiang | 2017 | Journal of Arid Land2017，9，6： | 5 |
| 19 | Integrated optimization design of smart morphing wing for accurate shape control显示文摘Smart morphing wing, which is equipped with smart materials and able to change structural geometry adaptively, can further improve aerodynamic efficiency of aircraft. This paper presents a new integrated layout and topology optimization design for morphing wing driven by shape memory alloys(SMAs). By simultaneously optimizing the layout of smart actuators and topology of wing substrate, the ultimately determined configuration can achieve smooth, continuous and accurate geometric shape changes. In addition, aerodynamic analysis is carried out to compare smart morphing wing with traditional hinged airfoil. Finally, the optimized smart wing structure is constructed and tested to demonstrate and verify the morphing functionality. Application setbacks are also pointed out for further investigation. | Xiaojun GU Kaike YANG Manqiao WU Yahui ZHANG Jihong ZHU Weihong ZHANG | 2021 | Chinese Journal of Aeronautics2021，34，1： | 5 |
| 20 | Stiffeners layout design of thin-walled structures with constraints on multi-fastener joint loads显示文摘The purpose of this paper is to present an extended topology optimization method for the stiffeners layout design of aircraft assembled structures. Multi-fastener joint loads and manufacturing constraints are considered simultaneously. On one hand, the joint loads are calculated and constrained within a limited value to avoid the failure of fasteners. On the other hand, the manufacturing constraints of the material distribution in the machining directions of stiffeners are implemented by an improved piecewise interpolation based on a beveled cut-surface. It is proven that the objective function is strictly continuous and differentiable with respect to the piecewise interpolation. The effects of the extended method with two different constraints are highlighted by typical numerical examples. Compared with the standard topology optimization, the final designs have clearly shown the layout of stiffeners and the joint loads have been perfectly constrained to a satisfying level. | Jie HOU Jihong ZHU Fei HE Weihong ZHANG Wenjie GUO | 2017 | Chinese Journal of Aeronautics2017，30，4： | 5 |
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