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| 1 | A distributed scheme developed for eco-hydrological modeling in the upper Heihe River显示文摘Modeling the hydrological processes at catchment scale requires a flexible distributed scheme to represent the catchment topography,river network and vegetation pattern.This study has developed a distributed scheme for eco-hydrological simulation in the upper Heihe River.Based on a 1 km×1 km grid system,the study catchment is divided into 461 sub-catchments,whose main streams form the streamflow pathway.Furthermore,a 1 km grid is represented by a number of topographically similar'hillslope-valley'systems,and the hillslope is the basic unit of the eco-hydrological simulation.This model is tested with a simplified hydrological simulation focusing on soil-water dynamics and streamflow routing.Based on a 12-year simulation from 2001 to 2012,it is found that variability in hydrological behavior is closely associated with climatic and landscape conditions especially vegetation types.The subsurface and groundwater flows dominate the total river runoff.This implies that the soil freezing and thawing process would significantly influence the runoff generation in the upper Heihe basin.Furthermore,the runoff components and water balance characteristics vary among different vegetation types,showing the importance of coupling the vegetation pattern into catchment hydrological simulation.This paper also discusses the model improvement to be done in future study. | YANG DaWen GAO Bing JIAO Yang LEI Hui Min ZHANG YanLin YANG HanBo CONG ZhenTao | 2015 | Science China Earth Sciences2015，58，1： | 20 |
| 2 | Accuracy and spatio-temporal variation of high resolution satellite rainfall estimate over the Ganjiang River Basin显示文摘Based on spatial interpolation rainfall of the ground gauge measurement,we proposed a method to comprehensively evaluate and compare the accuracy of satellite rainfall estimates (SREs) at three spatial scales:0.25°×0.25° grid scale,sub-catchment scale and the whole basin scale.Using this method,we evaluated the accuracy of six high-resolution monthly SREs (TRMM 3B42 V6,3B42RT V6,CMORPH,GSMaP MWR+,GSMaP MVK+ and PERSIANN) and revealed the spatio-temporal variation of the SRE accuracy based on spatial interpolated rainfall from a dense network of 325 gauges during 2003-2009 over the Ganjiang River Basin in the Southeast China.The results showed that ground gauge-calibrated 3B42 had the highest accuracy with slight overestimation,whereas the other five uncalibrated SREs had severe underestimation.The accuracy of the six SREs in wet seasons was remarkably higher than that in the dry seasons.When the time scale was expanded,the accuracy of SRE,particularly 3B42,increased.Furthermore,the accuracy of SREs was relatively low in the western mountains and northern piedmont areas,while it was relatively high in the central and southeastern hills and basins of the Ganjiang River Basin.When the space scale was expanded,the accuracy of the six SREs gradually increased.This study provided an example for of SRE accuracy validation in other regions,and a direct basis for further study of SRE-based hydrological process. | HU QingFang YANG DaWen WANG YinTang YANG HanBo | 2013 | Science China(Technological Sciences)2013，56，4： | 19 |
| 3 | Distribution of heavy metals in sediments of the Pearl River Estuary,Southern China:Implications for sources and historical changes显示文摘The distribution of heavy metals(Pb,Zn,Cd and As) in sediments of the Pearl River Estuary was investigated.The spatial distribution of heavy metals displayed a decreasing pattern from the turbidity maxima to both upstream and downstream of the estuary,which suggested that suspended sediments played an important role in the trace metal distribution in the Pearl River Estuary.In addition,metal concentrations were higher in the west part of the estuary which received most of the pollutants from the Pearl River.In the sediment cores,fluxes of heavy metals were consistent with a predominant anthropogenic input in the period 1970-1990.From the mid-1990s to the 2000s,there was a significant decline in heavy metal pollution.The observed decline has shown the result of pollution control in the Pearl River Delta.However,it is noteworthy that the metal concentrations in the most recent sediment still remained considerably high.Taken together,the enrichment of heavy metals in sediments was largely controlled by anthropogenic pollution. | Feng Ye Xiaoping Huang Dawen Zhang Lei Tian Yanyi Zeng | 2012 | Journal of Environmental Sciences2012，24，4： | 18 |
| 4 | Effects of ferrous and manganese ions on anammox process in sequencing batch biofilm reactors显示文摘Ferrous and manganese ions, as essential elements, significantly affect the synthesis of Haem-C, which participates in the energy metabolism and proliferation of anammox bacteria. In this study, two identical sequencing batch biofilm reactors were used to investigate the effects of ferrous and manganese ions on nitrogen removal efficiency and the potential of metal ions serving as electron donor/acceptors in the anammox process. Fluorescence in situ hybridization analysis was applied to investigate the microbial growth. Results showed that the nitrogen removal increased at high concentrations of Fe2+and Mn2+and the maximum removal efficiency was nearly 95% at Fe2+ 0.08 mmol/L and Mn2+0.05 mmol/L, which is nearly 15% and 8% higher than at the lowest Fe2+ and Mn2+concentrations(0.04 and 0.0125 mmol/L). The stabilities of the anammox reactor and the anammox bacterial growth were also enhanced with the elevated Fe2+and Mn2+concentrations. The Fe2+and Mn2+were consumed by anammox bacteria along with the removal of ammonia and nitrite. Stoichiometry analysis showed Fe2+could serve as an electron donor for NO-3-N in the anammox process. Nitrate could be reduced with Fe2+serving as the electron donor in the anammox system, which causes the value of NO-2-N/NH+ 4-N to decrease with the increasing of N-removal efficiency. | Xiaoli Huang Dawen Gao Sha Peng Yu Tao | 2014 | Journal of Environmental Sciences2014，26，5： | 13 |
| 5 | Spatio-temporal variation of net anthropogenic nitrogen inputs in the upper Yangtze River basin from 1990 to 2012显示文摘The net anthropogenic nitrogen input(NANI) is an important nutrient source that causes eutrophication in water bodies. Understanding the spatio-temporal variation of NANI is important for regional environment assessment and management.This paper calculated NANI in the upper Yangtze River basin(YRB), upstream of the Three Gorges Dam(TGD), from1990 to 2012, and analyzed its spatio-temporal characteristics. Over the past 23 years of the study, the average annual NANI increased from 3200 kg N km^(-2) to 4931 kg N km^(-2). The major components were fertilizer N application, atmospheric N deposition,and net food and feed N import. In the northwest high mountainous region with a sparse population, the main component was atmospheric N deposition. Fertilizer N application and net food and feed N import were concentrated in the Chengdu Plain because of the high population density and large areas of farmland. This research found that NANI increased with rapid urbanization and increasing population. The Pearson correlation results illustrated that the spatial distributions of NANI and its major components were affected by land cover/use, agricultural GDP and total population. Increasing NANI has been the major cause of the degrading stream water quality over the past 20 years and is becoming a major threat to the water quality of the TGD reservoir. | WANG Ai TANG LiHua YANG DaWen LEI HuiMin | 2016 | Science China Earth Sciences2016，59，11： | 11 |
| 6 | Differences in changes of potential evaporation in the mountainous and oasis regions of the Tarim basin, northwest China显示文摘Data from eleven meteorological stations in the Tianshan mountains and the north slope of west Kunlun mountains, and eighteen meteorological stations in the Kaidu-Kongque river, Akesu river, Kashiger river and Yankant river oases were examined to assess the differences in changes in potential evaporation from 1960 to 2006 in the mountainous and oasis regions of the Tarim basin and the relationships of these changes to meteorological factors. The decreasing trends in potential evaporation were primarily due to the decrease in the aerodynamic terms in both the mountainous and oasis regions, but the trends in the oasis regions were more pronounced. Based on the complementary relationship between potential and actual evaporation, the decreasing trends in potential evaporation appeared to be related to the increasing trends in precipitation in the mountainous regions and the increasing trends in water consumption in the oasis regions, thus reflecting the different impacts of natural changes and anthropogenic influences. | HAN SongJun HU HePing YANG DaWen LIU QunChang | 2009 | Science China(Technological Sciences)2009，52，7： | 9 |
| 7 | Determination of interface width value in phase-field simulation of dendritic growth into undercooled melt显示文摘The influence of the interface width value on the simulation results and its dependence upon thermo-physical parameters in the phase-field simulation of dendritic growth into undercooled melt are investigated. After choosing the reasonable interface width value, the tip velocities of dendritic growth in Ni melt under different undercoolings are calculated and compared with the experimental data in order to benchmark our results. It is shown that the reasonable interface width value, which is determined by the undercooling, anisotropy, interface kinetic, and thermal diffusivity, has to be taken low enough, and the agreement of our results with experimental data verifies that the credible results can be achieved as long as the interface width value is adequately low. This paper provides the basis of determining interface width value in simulating dendritic growth into undercooled melt by phase-field approach. | YU Yanmei, YANG Gencang , ZHAO Dawen and LU Yili(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China) | 2002 | Progress in Natural Science:Materials International2002，12，3： | 8 |
| 8 | Research progress of gut flora in improving human wellness显示文摘Human wellness is the ultimate goal of our efforts in improving the human life.Special foods are undoubtedly important in achieving human wellness.However,overeating significantly leads to obesity and diabetes.These chronic diseases will in turn affect the human wellness.Therefore,“dietary restriction and proper exercise”were introduced in the human daily life.Different foods cause various effects on the human health.The diversification of diet is a priority for nutritionists to keep our body healthy.To avoid diabetes mellitus,special foods for ketogenic diet,low-carbon diet,and low-calorie intake are also gradually attracting attention.In addition,the hypothesis that“hunger sensation comes from gut flora”brings new light to the research on the biological motivation for humans to eat food.This hypothesis has been gradually demonstrated using the flexible fasting technology by providing special foods,such as plant polysaccharides and dietary fibers.The response to food-needing signals from the gut flora to these foods demonstrates the importance of the gut flora in improving human wellness.The gut flora is probably an essential factor for translating the food-eating signals and converting the nutrition to our body.Therefore,“gut flora priority principle”is developed to guarantee human wellness.The 16S rRNA sequencing and mass spectrometric techniques can be used to identify the gut flora,which may guide us to a new era of human wellness based on gut flora wellness. | Chenggang Zhang Wenjing Gong Zhihui Li Dawen Gao Yan Gao | 2019 | Food Science and Human Wellness2019，8，2： | 8 |
| 9 | Hydrological cycle and water resources in a changing world:A review显示文摘Water is the fundamental natural resource that supports life,ecosystems and human society.Thus studying the water cycle is important for sustainable development.In the context of global climate change,a better under-standing of the water cycle is needed.This study summarises current research and highlights future directions of water science from four perspectives:(i)the water cycle;(ii)hydrologic processes;(iii)coupled natural-social water systems;and(iv)integrated watershed management.Emphasis should be placed on understanding the joint impacts of climate change and human activities on hydrological processes and water resources across temporal and spatial scales.Understanding the interactions between land and atmosphere are keys to addressing this is-sue.Furthermore systematic approaches should be developed for large basin studies.Areas for focused research include:variations of cryosphere hydrological processes in upper alpine zones;and human activities on the wa-ter cycle and relevant biogeochemical processes in middle-lower reaches.Because the water cycle is naturally coupled with social characteristics across multiple scales,multi-process and multi-scale models are needed.Hy-drological studies should use this new paradigm as part of water-food-energy frontier research.This will help to promote interdisciplinary study across natural and social sciences in accordance with the United Nation’s sustainable development goals. | Dawen Yang Yuting Yang Jun Xia | 2021 | Geography and Sustainability2021，2，2： | 7 |
| 10 | Seasonal variations in the concentration and removal of nonylphenol ethoxylates from the wastewater of a sewage treatment plant显示文摘In this study, we investigated the occurrence and fate of nonylphenol(NP), nonylphenol monoethoxylate(NP1EO) and nonylphenol diethoxylate(NP2EO) in a full scale sewage treatment plant, which applied an Anaerobic/Oxic process. Concentrations of NP, NP1 EO and NP2 EO in the wastewater were measured during the period spanning a whole year.The results showed remarkable seasonal variation in the concentrations of the compounds.The NPn EO compounds were most abundant in winter, with the total concentrations of influent NP, NP1 EO and NP2 EO ranging from 3900 to 7000 ng/L, 4000 to 4800 ng/L and 5200 to 7200 ng/L, respectively. Regarding the total removal efficiencies of the three types of short-chain NPn EO compounds, different trends were exhibited according to different seasons. The average removal efficiency of NP for the different seasons ranked as follows:winter > summer > autumn > spring; NP2 EO concentrations decreased as follows: summer >autumn > winter > spring, while NP1 EO concentrations reduced according to: spring >summer > autumn > winter. We also investigated the contribution ratio of individual treatment units in the A/O process, with the findings suggesting that the anaerobic treatment unit plays an important role in the elimination of short-chain NPn EOs from the wastewater. | Dawen Gao Zhe Li Junxue Guan Hong Liang | 2017 | Journal of Environmental Sciences2017，29，4： | 6 |
| 11 | Anaerobic ammonia oxidizing bacteria: ecological distribution, metabolism, and microbial interactions显示文摘 | Dawen Gao Xiaolong Wang Hong Liang Qihang Wei Yuan Dou Longwei Li | 2018 | Frontiers of Environmental Science & Engineering2018，12，3： | 5 |
| 12 | Geochemical Mapping:With Special Emphasis on Analytical Requirements显示文摘摘要:在从 1973 ~ 1988 执行的世界上印射工程的超过 40 国家、地区性的 geochemical 不遵循普通标准。特别地,他们有许多分析缺乏。在时期 1988 ~ 1992,印射工程(工程 259 联合国教科文组织的 IGCP 节目) 的国际 Geochemical 准备了设计标准化印射方法的 geochemical 的建议。分析要求是全面建议的一个必要部件。他们包括了下列:71 个元素应该在印射工程的未来被分析;踪迹和 ultratrace 元素的察觉限制一定比相应外壳的丰富低;并且中国 GSD 和加拿大的 STSD 标准样品系列应该被用于全球数据的关联。一个建议也被做收集 5000 件合成样品,在盖住整个地球的陆地表面的很低的采样密度。在全球 Geochemical 上的 1997 一 IUGS 工作组,基线被形成继续以 IGCP 259 开始了的工作。从 1997 直到现在,新进步在工作组保护下特别在中国和 FOREGS 国家被取得了包括合适的采样媒介的学习,一个多元素的开发分析系统,为在矿物质探索的宽空间的印射的能干的实验室和角色的选择的新熟练测试。等候答案的主要问题之一是许多实验室的无能遇见 IGCP 建议产生高质量的 geochemical 地图。幸好,在中国和欧洲的几个实验室表明了一个能力满足要求,他们将很好被放显示技术帮助到另外的国家。 | XIE Xuejing CHENG Hangxin LIU Dawen | 2008 | Acta Geologica Sinica(English Edition)2008，82，2： | 5 |
| 13 | An operating state estimation model for integrated energy systems based on distributed solution显示文摘In view of the disadvantages of the traditional energy supply systems,such as separate planning,separate design,independent operating mode,and the increasingly prominent nonlinear coupling between various subsystems,the production,transmission,storage and corn sumption of multiple energy sources are coordinated and optimized by the integrated energy system,which improves energy and infrastructure utilization,promotes renewable energy consumption,and ensures reliability of energy supply.In this paper,the mathematical model of the electricity-gas interconnected integrated energy system and its state estimation method are studied.First,considering the nonlinearity between measurement equations and state variables,a performance simulation model is proposed.Then,the state consistency equations and constraints of the coupling nodes for multiple energy sub-systems are established,and constraints are relaxed into the objective function to decouple the integrated energy system.Finally,a distributed state estimation framework is formed by combining the synchronous alternating direction multiplier method to achieve an efficient estimation of the state of the integrated energy system.A simulation model of an electricity-gas interconnected integrated energy system verifies the efficiency and accuracy of the state estimation method proposed in this pape.The results show that the average relative errors of voltage amplitude and node pressure estimated by the proposed distributed state estimation method are only 0.0132%and 0.0864%,much lower than the estimation error by using the Lagrangian relaxation method.Besides,compared with the centralized estimation method,the proposed distributed method saves 5.42 s of computation time.The proposed method is more accurate and efficient in energy allocation and utilization. | Dengji ZHOU Shixi MA Dawen HUANG Huisheng ZHANG Shilie WENG | 2020 | Frontiers in Energy2020，14，4： | 5 |
| 14 | Long-term variability of the carbon balance in a large irrigated area along the lower Yellow River from 1984 to 2006显示文摘The irrigated areas in the northern region of China are important food production areas. Therefore, studies on the variability of the carbon balance in these agro-ecosystems are fundamental for the management of carbon sequestration. This paper simulated the long-term variability of the carbon balance in a typical irrigated area along the lower Yellow River from 1984 to 2006, using a process-based ecosystem model called the Simple Biosphere Model, version 2. The mean annual gross primary production (GPP), mean annual net assimilation rate (NAR), mean annual soil respiration (Rs ), and mean annual net ecosystem exchange (NEE) were 1733, 1642, 1304, and 338g C m-2 a-1 , respectively. A significant increasing trend in the seasonal total NAR during the wheat growing season, and a significant decreasing trend in the seasonal total NAR during the maize growing season were detected. However, no significant trend was found in the annual NAR, R s , and NEE. The average carbon sequestration was 1.93 Tg C a-1 when the grain harvest was not taken into account, and the carbon sequestration amount during the maize season was higher than that during the wheat season. However, the agro-ecosystem was a weak carbon source with a value of 0.23 Tg C a-1 , when the carbon in the grain was assumed emitted into the atmosphere. | LEI HuiMin YANG DaWen CAI JianFeng WANG FengJiao | 2013 | Science China Earth Sciences2013，56，4： | 4 |
| 15 | A Nonlinear Interval Portfolio Selection Model and Its Application in Banks显示文摘在古典 Markowitzs 吝啬变化的模型,象内在的财产未来回来的平均数和协变性那样的参数被假定确切被知道。然而,这不总是是盒子。参数经常对应于在一个范围以内的秋天,或罐头在投资决定必须被做的时间暧昧地被知道的数量。处于如此的状况,投资者在投资和风险等等上决定回来并且基于经验和经济智慧做公事包决定。这份报纸试着在模糊集合理论使用间隔数字的概念与一个银行的流畅要求的考虑把古典吝啬变化的公事包选择模型递一个吝啬缺点的半变化模型。半变化限制被采用控制缺点风险,填基于描绘缺点风险的线性半绝对的偏差的存在间隔公事包优化模型。模拟结果证明模型与回来的最高或最低的吝啬的历史的率为危险财产要用体力地表现,最佳的投资比例有好稳定性。这建议为这些种财产,模型能减少偏差根据决定制造者经验和经济智慧引起的高偏差的风险。 | YAN Dawen HU Yaxing LAI Kin Keung | 2018 | Journal of Systems Science & Complexity2018，31，3： | 3 |
| 16 | Effect of Cooling Water Flow Path on the Flow and Heat Transfer in a 660 MW Power Plant Condenser显示文摘The effect of the cooling water flow path on the flow and heat transfer in a double tube-pass condenser for a 660 MW power plant unit was numerically investigated based on a porous medium model. The results were used to analyze the streamline, velocity, air mass fraction and heat transfer coefficient distributions. The simulations indicate that the cooling water flow path is important in large condensers. For the original tube arrangement, the heat transfer with the lower-upper cooling water flow path is better than that with the upper-lower cooling water flow path. The reason is that the steam cannot flow into the internal of upper tube bundle and the air fractions are higher in the upper tube bundle with the upper-lower cooling water flow path. An improvement tube arrangement was developed for the upper-lower cooling water flow path which reduced the back pressure by 0.47 kPa compared to the original scheme. Thus, the results show that the tube arrangements should differ for different cooling water flow paths and the condenser heat transfer can be improved for the upper-lower cooling water flow path by modifying the tube arrangement. | ZHONG Dawen MENG Ji'an QIN Peng QIU Xiaolong JIANG Ping LI Zhixin YUAN Fang | 2019 | Journal of Thermal Science2019，28，2： | 3 |
| 17 | Current molecular biologic techniques for characterizing environmental microbial community显示文摘因为他们维持自然平衡的庞大的数字和本能功能,微生物对地球重要。因为微生物学超过一个世纪以前在环境科学和工程被使用,研究人员们有关微生物引起的时间空间的变化为越来越多的信息需要在几乎,到废水处理的从污染土壤的每块地种(WWTP ) 。为过去的 30 年,为环境微生物引起的社区(EMC ) 探索的分子的生物学的技术跨越了大量途径与计算机科学的帮助便于研究:更快、更精确、更敏感。在这篇特征文章,我们详细构画出在 EMC 的察觉使用的几种当前、新兴的分子的生物学的技术,并且介绍并且估计三个有希望的工具的申请。 | Dawen GAO Yu TAO | 2012 | Frontiers of Environmental Science & Engineering2012，6，1： | 2 |
| 18 | Attribution analysis based on the Budyko hypothesis for detecting the dominant cause of runoff decline in Haihe basin显示文摘 | Xiangyu Xu Dawen Yang Hanbo Yang Huimin Lei | 2014 | Journal of Hydrology2014，，： | 2 |
| 19 | Occurrence and fate of typical antibiotics in wastewater treatment plants in Harbin, North-east China显示文摘As a new pollutant, antibiotics in the environment and their removal in wastewater treatment plants (WWTPs) have gained considerable attention. However, few studies investigated antibiotics in the north-eastern areas of China. By employing high-performance liquid chromatography-tandem mass spectrometry, the concentration distribution and removal of 12 antibiotics belonging to four types (cephalosporins, sulfonamides, fluoroquinolones, and macrolides) were investigated in influents and effluents as well as the removal efficiencies of four typical treatment processes in 18 wastewater treatment plants of Harbin City, north-eastem China. Macrolides and fluoroquinolones presented relatively higher detection concentrations and rates both in the water and in the sludge phases. Sulfonamides and cephalosporins displayed higher detection concentrations in the water phase. The representative antibiotics in influents and effluents included ROX, NOR, OFL, SMX, AZI, and CLA, with detection rates above 95%. The detection rates of the other six antibiotics exceeded 30%. In the sludge, the other five antibiotics, except SMX, presented relatively higher detection concentrations and rates, with detection rates greater than 95%. For cephalosporin, the detection rates of CTX and CFM in the sludge were 0. The removal efficiencies for the 12 antibiotics differed greatly, with average values ranging from 30% to 80% and the highest values for cephalosporin. The removal of antibiotics did not differ significantly among the four different treatment processes. | Weihua Wang Wanfeng Zhang Hong Liang Dawen Gao | 2019 | Frontiers of Environmental Science & Engineering2019，13，3： | 2 |
| 20 | Innovation Requirements and Progress of Dialysis Water Treatment System显示文摘With the development of medicine,people are becoming more and more aware of the quality of medical water supply,such as dial ysis water,dental water,preparation water,operating room water,supply room water.Therefore,People are constantly improving the water treatment system and its standardized,and the demand for dialysis water is also becoming more and more strict.Hemodialysis is an effective means of maintaining the life of renal failure patients,120~180L water will be used for a conventional dialysis treatment,and high flux dialysis will consume more. | Jun Ke Lifong Yan Taksui Wong Bo Hu Shuang Cui Sibo Huang Aiyun Cha Jie Huang Hongwei Hu Dawen Yun Shaofeng Huang Jie Shu Mingming Ma Lianghong Yin Xiangnan Dong Chen Yun Zuhui Chen Fanna Liu | 2017 | 临床医学工程2017，24，S1： | 2 |
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