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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 | China's wetland change (1990-2000) determined by remote sensing显示文摘Two wetland maps for the entire China have been produced based on Landsat data acquired around 1990 and 2000. Wetlands in China have been divided into 3 broad categories with 15 sub-categories except rice fields. In 1990, the total wetland area in China was 355208 km2 whereas in 2000 it dropped to 304849 km2 with a net loss of 50360 km2. During an approximate 10-year period, inland wetland reduced from 318326 to 257922 km2, coastal wetland dropped from 14335 to 12015 km2, while artificial wetland increased from 22546 to 34911 km2. The greatest natural wetland loss occurred in Heilongjiang, Inner Mon- golia, and Jilin with a total loss of over 57000 km2 of wetland. In western China, over 13000 km2 of wetlands were newly formed in Xinjiang, Tibet, and Qinghai. About 12000 km2 of artificial wetlands were also added for fish farm and reservoir constructions. The newly formed wetlands in western China were caused primarily by climate warming over that region whereas the newly created artificial wetlands were caused by economic developments. China’s wetland loss is caused mainly by human activities. | Peng Gong ZhenGuo Niu Xiao Cheng KuiYi Zhao DeMin Zhou JianHong Guo Lu Liang XiaoFeng Wang DanDan Li HuaBing Huang et al. | 2010 | Science China Earth Sciences2010，53，7： | 28 |
| 3 | 水稻土施硅对土壤-水稻系统中镉的降低效果显示文摘水稻中镉的积累造成人类健康的风险,增加水稻硅素能减轻镉中毒症状,降低稻米镉积累,但是硅对重金属的作用机理尚不清楚。主要研究了在中度和高度镉污染的土壤中,通过施用固态和液态的富硅物质对土壤-水稻系统中镉的吸收和转运的影响,探明决定镉和硅在根与芽的质外体和共质体中的作用机理。试验结果表明:(1)在中度和高度污染的土壤中,镉在土壤-作物系统中的转移和积累情况是不同的,可以通过富硅物质中的单硅酸与镉离子的相互作用,增加镉在硅物质表面的吸附来减少镉在土壤中的流动;(2)富硅物质可以降低水稻根和芽中镉的积累,在高度镉污染的情况下,施用硅可以使镉大量积累在水稻根及其共质体中,并降低根及其共质体中镉的转换和积累;(3)新鲜土壤中水萃取态的单硅酸含量与镉在土壤-作物系统中的流动性、转运以及积累等主要参数密切相关。 | 魏晓 张鹏博 赵丹丹 Elena Bocharnikova Vladimir Matichenkov Demin Dmitry | 2018 | 生态学报2018，38，5： | 21 |
| 4 | 基于HTML5与WebGL的机器人3D环境下的运动学仿真显示文摘利用三维计算机辅助设计软件Remo3D建立机器人各连杆的三维模型,用标准COLLADA来描述机器人各连杆之间的相互连接关系,采用D-H法建立了5自由度机械手的运动方程,通过齐次矩阵的变换解决了顺逆运动学问题.利用HTML5语言和WebGL图形函数库的机器人三维仿真系统实现机器人的实时图形仿真,且无需安装程序可异地同步获取.另外,应用程序基于开放标准,可以在任何电脑或智能设备的现代浏览器上运行. | Alexey Demin 代沅兴 李新 王宛山 | 2014 | 东北大学学报(自然科学版)2014，35，4： | 16 |
| 5 | Valuation of Lake and Marsh Wetlands Ecosystem Services in China显示文摘Wetlands are highly productive natural ecosystems, providing valuable goods and services. There is growing interest in transferring ecosystem service value from the existing wetlands studied to other wetlands ecosystems at a large geographic scale. The benefit transfer method uses the known values from wetlands to predict the value of other wetland sites. This methodology requires only limited time and resources. The present study calculated the value of the ecological services provided by lake and marsh wetlands in China in terms of biodiversity indices, water quality indices and economic indices. Basic data on wetlands were obtained through remote sensing images. The results show that: 1) The total ecosystem service value of the lake and marsh wetlands in 2008 was calculated to be 8.1841 × 1010 United States Dollars(USD), with the marsh and lake wetlands contributing 5.6329 × 1010 and 2.5512 × 1010 USD, respectively. Values of marsh ecosystem service were concentrated in Heilongjiang Province(2.5516 × 1010 USD), Qinghai Province(1.2014 × 1010 USD), and Inner Mongolia Autonomous Region(1.1884 × 1010 USD). The value of the lakes were concentrated in Tibet Autonomous Region(6.223 × 109 USD), Heilongjiang(5.810 × 109 USD), and Qinghai(5.500 × 109 USD). 2) Waste treatment and climate regulation services contributed to 26.29% and 24.74% respectively, of the total ecosystem service value of the marsh wetlands. Hydrological regulation and waste treatment contributed to 41.39% and 32.75%, respectively, of the total ecosystem service value of the lake wetlands. 3) The total ecological service value of the lake and marsh wetlands was 54.64% of the total service value of natural grassland ecosystems and 30.34% of the total service value of forests ecosystems in China. | ZHANG Yiran ZHOU Demin NIU Zhenguo XU Fengjiao | 2014 | Chinese Geographical Science2014，24，3： | 13 |
| 6 | Feasibility and value of quantitative dynamic contrast enhancement MR imaging in the evaluation of sinonasal tumors显示文摘 | Xian Junfang Du Huarui Wang Xinyan Yan Fei Zhang Zhengyu Hao Hui Zhao Bo Tong Yajian Zhang Jue Han Demin | 2014 | Chinese Medical Journal2014，，12： | 13 |
| 7 | VIBRATION ANALYSIS OF TURBINE BASED ON FLUID-STRUCTURE COUPLING显示文摘The vibration of a Francis turbine is analyzed with the additional quality matrix method based on fluid-structure coupling (FSC). Firstly, the vibration frequency and mode of blade and runner in air and water are calculated. Secondly, the influences to runner frequency domain by large fow, small flow and design flow working conditions are compared. Finally the influences to runner modes by centrifugal forces under three rotating speeds of 400 r/min, 500 r/min and 600 r/min are compared. The centrifugal force and small flow working condition have greatly influence on the vibration of small runner. With the increase of centrifugal force, the vibration frequency of the runner is sharply increased. Some order frequencies are even close to the runner natural frequency in the air. Because the low frequency vibration will severely damage the stability of the turbine, low frequency vibration of units should be avoided as soon as possible. | LIU Demin LIU Xiaobing | 2008 | Chinese Journal of Mechanical Engineering2008，21，4： | 11 |
| 8 | Sodium fluoride induces apoptosis through reactive oxygen species-mediated endoplasmic reticulum stress pathway in Sertoli cells显示文摘Excessive fluoride exposure is known to contribute to reproductive system dysfunction,ultimately leading to pathological damage and apoptosis in cells. Although both oxidative and endoplasmic reticulum(ER) stresses have been implicated in fluorosis, the signaling pathways and their roles in sodium fluoride(Na F)-induced apoptosis of Sertoli cells have been sparsely described. In this study, oxidative damage, ER stress, and apoptosis were analyzed after Sertoli cells were treated with varying doses of Na F for 24 hr. Moreover, the antioxidant N-acetylcysteine(NAC) and pro-apoptotic transcription factor CHOP knockdown were used to clarify the precise interplay between reactive oxygen species(ROS), ER stress and their roles in NaF-induced apoptosis in Sertoli cells. The present study indicated that NaF significantly decreased cell viability and induced apoptosis in Sertoli cells. In addition, NaF exposure facilitated the accumulation of ROS and increased nuclear translocation of nuclear factor erythroid 2-related factor 2(Nrf2) in Sertoli cells. Treatment with NAC caused remarkable recovery from these NaF-induced responses. Meanwhile, excessive NaF triggered ER stress as evidenced by up-regulated glucose-regulated protein 78 k Da(GRP78), PKR-like ER kinase(PERK), phosphorylation of eukaryotic translation initiation factor 2α(p-eI F2α) and CCAAT/enhancer-binding protein-homologous protein(CHOP), without affecting total eukaryotic translation initiation factor 2α(e IF2α). NAC effectively blocked the activation of ER stress, suggesting that Na F-induced ROS is an early event that triggers ER stress. Taken together, the results demonstrate that the ROS-mediated ER stress pathway is the crucial mechanistic event involved in NaF-induced apoptosis of Sertoli cells. | Yang Yang Xinwei Lin Hui Huang Demin Feng Yue Ba Xuemin Cheng Liuxin Cui | 2015 | Journal of Environmental Sciences2015，27，4： | 10 |
| 9 | 一种改进的机器人动力学参数辨识方法显示文摘机器人动力学模型是机器人相关研究的基础,而动力学参数辨识是获得动力学模型的有效途径之一.针对机器人动力学参数的辨识问题,提出了由外关节向内关节逐一辨识的方法.并以傅里叶级数作为激励轨迹的基本函数形式,设计了关节激励轨迹.然后利用粒子群优化方法 PSO(Particle Swarm Optimization),以最小化辨识系数矩阵的条件数为目标函数,优化设计了激励轨迹,以提高辨识过程中的抗干扰能力.最后在Simulink中借助SimMechanics模块仿真验证了文中方法的有效性,同时也验证了文中的激励轨迹优化方法可增强辨识过程的抗干扰能力,提高辨识精度. | 黎柏春 王振宇 Alexey Demin 于天彪 王宛山 | 2015 | 中国工程机械学报2015，13，5： | 10 |
| 10 | Unstable flow characteristics in a pump-turbine simulated by a modified Partially-Averaged Navier-Stokes method显示文摘Positive slope characteristics are very important for the safe and stable operation of a pump-turbine. In this study, the unsteady flows in a pump-turbine at pump mode are investigated numerically. To predict the positive slope characteristics with an improved accuracy, a modified Partially-Averaged Navier-Stokes(MPANS) model is employed to capture the unstable physics in a pump-turbine. It is confirmed that the present numerical method predicts the positive slope characteristics in the pumpturbine fairly well compared with the experimental data. It is noted that at the drooping point of the performance curve(positive slope), there are three sets of rotating stall cells in the flow passages of both the guide vanes and stay vanes. In the guide vane region, the flow is completely shut off by the rotating stall, whereas in the stay vane region, the flow passage is partly blocked at the drooping point. The numerical results also reveal that the remarkable variation and high angle of attack(AOA) values upstream the leading edge of the guide vane contribute to the flow separation at the vane suction side and induce rotating stall in the flow passage within the positive slope region. Furthermore, the propagation of the rotating stall is depicted by both Eulerian and Lagrangian viewpoints: the rotating stall blocks the flow passage between two neighboring guide vanes and pushes the flow toward the leading edge of the subsequent guide vane. The rotating stall cell shifts along the rotational direction with a much lower frequency(0.146 f_n) compared with the runner rotational frequency, f_n. | YANG Dandan LUO XianWu LIU DeMin HUANG RenFang ZHU ZuChao | 2019 | Science China(Technological Sciences)2019，62，3： | 7 |
| 11 | Resilience-based retrofitting of existing urban RC-frame buildings using seismic isolation显示文摘The improvement of the seismic resilience of existing reinforced-concrete(RC) frame buildings, which is essential for the seismic resilience of a city, has become a critical issue. Although seismic isolation is an effective method for improving the resilient performance of such buildings, target-oriented quantitative improvements of the resilient performance of these buildings have been reported rarely. To address this gap, the seismic resilience of two existing RC frame buildings located in a high seismic intensity region of China were assessed based on the Chinese Standard for Seismic Resilience Assessment of Buildings. The critical engineering demand parameters(EDPs) affecting the seismic resilience of such buildings were identified. Subsequently, the seismic resilience of buildings retrofitted with different isolation schemes(i.e., yield ratios) were evaluated and compared, with emphasis on the relationships among yield ratios, EDPs, and levels of seismic resilience. Accordingly, to achieve the highest level of seismic resilience with respect to the Chinese standard, a yield ratio of 3% was recommended and successfully applied to the target-oriented design for the seismic-resilience improvement of an existing RC frame building. The research outcome can provide an important reference for the resilience-based retrofitting of existing RC frame buildings using seismic isolation in urban cities. | Yang Cantian Xie Linlin Li Aiqun Zeng Demin Jia Junbo Chen Xi Chen Min | 2020 | Earthquake Engineering and Engineering Vibration2020，19，4： | 7 |
| 12 | A New Species of the Genus Protobothrops(Squamata:Viperidae:Crotalinae) from the Dabie Mountains,Anhui,China显示文摘During a biological survey in July 2011, a pit viper was collected from the Yaoluoping Nature Reserve in the Dabie Mountains, Anhui, China. The pit viper's the total length measured 836 mm with a dorsal ground color of yellowbrown, decorated by 56 dark-brown transverse bands. The 4thsupralabial squama of the new species is separated from subocular by two squamae, and the tip of tail is orange; this combination of characters distinguish it from other species of the genus Protobothrops. Based on the body proportions, number of squamae, body color pattern, and comparing the data of its life history with those of other species of Protobothrops, we herein describe it as a new species, belonging to the genus of Protobothrops. | Xin HUANG Tao PAN Demin HAN Liang ZHANG Yinxu HOU Lei YU Heming ZHENG Baowei ZHANG | 2012 | Asian Herpetological Research2012，3，3： | 7 |
| 13 | LLDPE prepared by in situ polymerization using a dual-functional catalytic system of Ti(On-Bu)_4 /AlEt_3-Et(Ind)_2-ZrCl_2/MAO显示文摘Linear low-density polyethylene (LLDPE) was prepared by in situ polymerization using a dual-functional catalytic system containing Et(Ind)2ZrCl2/MAO and Ti(On-Bu)4 /AlEt3 used as co-polymerization catalyst and dimeriza-tion catalyst, respectively. The catalytic system showed high activity and the polymer with low melting point, narrow molecular weight distribution (MWD) and low crystallinity was produced. | LIU Zhongyang, XU Demin, GUO Cunyue, WANG Jun, HE Dawei & HU YouliangStale Key Lab of Engineering Plastics, Center for Molecular Science, Institute of Chemistry. Chinese Academy of Sciences, Beijing 100080, China Beijing Lab of Catalysis. China National Petroleum Corporation Key Lab of Catalysis, Beijing 100080, China | 2001 | Chinese Science Bulletin2001，46，24： | 7 |
| 14 | Quantitative Simulation on Soil Moisture Contents of Two Typical Vegetation Communities in Sanjiang Plain,China显示文摘Different types of vegetation occupy different geomorphology and water gradient environments in the San-jiang Plain,indicating that the soil moisture dynamics and water balance patterns of the different vegetation communi-ties might differ from each other.In this paper,a lowland system,perpendicular to the Nongjiang River in the Honghe National Nature Reserve(HNNR),was selected as the study area.The area was occupied by the non-wetland plant forest and the typical wetland plant meadow.The Microsoft Windows-based finite element analysis software package for simulating water,heat,and solute transport in variably saturated porous media(HYDRUS),which can quantita-tively simulate water,heat,and/or solute movement in variably-saturated porous media,was used to simulate soil moisture dynamics in the root zone(20-40 cm) of those two plant communities during the growing season in 2005.The simulation results for soil moisture were in a good agreement with measured data,with the coefficient of determi-nation(R2) of 0.44-0.69 and root mean square error(RMSE) ranging between 0.0291 cm3/cm3 and 0.0457 cm3/cm3,and index of agreement(d) being from 0.612 to 0.968.During the study period,the volumetric soil moisture content of meadow increased with the depth and its coefficient of variation decreased with the depth(from 20 cm to 40 cm),while under the forest the soil moisture content at different depths varied irregularly.The calculated result of water budget showed that the water budget deficit of the meadow was higher than that of the forest,suggesting that the meadow is more likely to suffer from water stress than the forest.The quantitative simulation by HYDRUS in this study did not take surface runoff and plant growth processes into account.Improved root water uptake and surface runoff models will be needed for higher accuracy in further researches. | LI Shanghua ZHOU Demin LUAN Zhaoqing PAN Yun JIAO Cuicui | 2011 | Chinese Geographical Science2011，21，6： | 7 |
| 15 | Experimental Investigation of Inter-Blade Vortices in a Model Francis Turbine显示文摘The inter-blade vortex in a Francis turbine becomes one of the main hydraulic factors that are likely to cause blade erosion at deep part load operating conditions. However, the causes and the mechanism of interblade vortex are still under investigation according to present researches. Thus the causes of inter-blade vortex and the effect of different hydraulic parameters on the inter-blade vortex are investigated experimentally. The whole life cycle of the inter-blade vortex is observed by a high speed camera. The test results illustrate the whole life cycle of the inter-blade vortex from generation to separation and even to fading. It is observed that the interblade vortex becomes stronger with the decreasing of flow and head, which leads to pressure fluctuation. Meanwhile,the pressure fluctuations in the vane-less area and the draft tube section become stronger when inter-blade vortices exist in the blade channel. The turbine will be damaged if operating in the inter-blade vortex zone, so its operating range must be far away from that zone. This paper reveals the main cause of the inter-blade vortex which is the larger incidence angle between the inflow angle and theblade angle on the leading edge of the runner at deep part load operating conditions. | Demin LIU Xiaobing LIU Yongzhi ZHAO | 2017 | Chinese Journal of Mechanical Engineering2017，30，4： | 6 |
| 16 | Structure of different types of coal metamorphism by HTEM显示文摘In order to discuss the effect of tectonic stress on the structural evolution of coal, given the importance attached to High-resolution Transmission Electron Microscopy (HTEM), we investigated several aspects of material structures of high-rank Carboniferous period coal, located in the northern foreland basin of the Dabie orogenic belt in eastern China. High powered crystal lattice images of Bright Fields (BF) and Selected Area Diffraction patterns (SAD) of different types of metamorphism in coal were obtained. The results show that the Basic Structural Units (BSU) become increasingly more compact as a function of rising tem-perature and pressure. Under pressure, the local orientation of molecules is strengthened, the arrangement of BSU speeds up and the degree of order is clearly enhanced. | LI Xiaoming CAO Daiyong LIU Demin | 2010 | Mining Science and Technology2010，20，6： | 6 |
| 17 | Synchronization of multiple autonomous underwater vehicles without velocity measurements显示文摘In this paper,we investigate the synchronization control of multiple autonomous underwater vehicles (AUVs),considering both state feedback and output feedback cases.Treating multiple AUVs as a graph,we define the tracking error of each AUV with both its own tracking error and the relative position errors with respect to its neighbors taken into account.Lyapunov analysis is used to derive the control law for each AUV.For the output feedback case,a passive filter is used to compensate for the unknown relative velocity errors among AUVs,and an observer is employed to estimate the velocity of the AUV itself.Rigid mathematical proof is provided for the proposed algorithms for both state feedback and output feedback cases.Simulations are provided to demonstrate the effectiveness of the proposed approach.It is shown that,the synchronization error is smaller in the case of considering the relative errors between AUVs than in the case of considering the tracking error of the single AUV only. | CUI RongXin YAN WeiSheng XU DeMin | 2012 | Science China(Information Sciences)2012，55，7： | 6 |
| 18 | Vocal cord mucosal flap for the treatment of acquired anterior laryngeal web显示文摘 | Xiao Yang Wang Jun Han Demin Ma Lijing Ye Jingying Xu Wen | 2014 | Chinese Medical Journal2014，，7： | 6 |
| 19 | Experimental Study on Interaction Between Degrees of Freedom in a Wave Buoy显示文摘Increasing degrees of freedom(DOFs)is a useful way to raise the power capture efficiency of oscillating wave energy converters.Thus,this study proposes a buoy with three DOFs,which are surge,heave,and pitch.The hydrodynamic performance and power capture efficiency of the buoy is physically modeled.Amplitudes of unidirectional and coupled motions are compared to analyze the interaction effect between freedoms under conditions with and without power take-off damping.The capture width ratio and corresponding growth rates are also calculated.Results show that the buoy makes a periodic sinusoidal(or approximate)movement in every DOF.Coupling effect can cause an increase in the amplitude in one DOF and a decrease in the amplitudes of the others.This phenomenon shows that the kinematic energy of the buoy redistributes to all DOFs compared with the unidirectional conditions.Adding DOFs can improve the power absorption of the buoy in most cases,but the number of DOFs is not the more the better. | HUANG Shuting SHI Hongda CAO Feifei TAN Junzhe CHENG Haixun LI Demin LIU Shangze GONG Haoxiang TAO Ji | 2019 | Journal of Ocean University of China2019，18，6： | 5 |
| 20 | Preparation of long-branched polyethylene by in situ poly-merization using late transition metal and metallocene catalysts显示文摘An in situ polymerization method was investigated to prepare long-branched polyethylene (LBPE) with ethylene alone and a single cocatalyst, methylalumoxane (MAO), by using a dual functional catalytic system containing late transition metal oligomerization catalyst and metal-locene copolymerization catalyst. The obtained long-branched polyethylene has the characteristics of low melting point, high activity and well-dispersed sequence distribution. | LIU Zhongyang GUO Cunyue MAZhi WANG Jun XU Demin HE Dawei HU Youliang | 2001 | Chinese Science Bulletin2001，46，24： | 5 |
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