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42篇 您的检索式:作者名="Haigen"
    题名 作者 年代 出处 被引量
1The Bedload Movement in the Changjiang Estuary显示文摘- Sandwaves in the Changjiang estuary were measured with a shallow sediment profiler and an echosounder from 1978 to 1988. The data, together with grain size and bedform of sediment indicates that the bedload movement by rolling and saltation is of great significance to sediment transport and is the principal factor responsible for sandwave and sandbody development in the estuary. The sandwaves were found well-developed, which is related to the tidal range and the velocity of ebb current. However, the further growth is restricted by strong flood current prevailing in the estuary. Because of the significant bedload, the sandbodies shift obviously and frequently, and sometimes the exchange of position occurs between the sandbodies and tidal channels. As a result, ships are regularly forced to change their navigation course.Li Jiufa, Shi Weirong, Shen Huanting Xu Haigen and Doeke Eisma Associate Professor, Institute of Estuarine & Coastal Research (1ECR), East China Normal University, Shanghai200062 Professor, IECR, East China Normal University, Shanghai 200062 Professor, Netherlands Institute for Sea Research, P. O. Box 59 1790 AB, Den Burg, Texel, The Netherlands 1993China Ocean Engineering1993,8,4:15
2Evaluating the suitability of TRMM satellite rainfall data for hydrological simulation using a distributed hydrological model in the Weihe River catchment in China显示文摘这研究的目的到份量上评估热带降雨测量有雨计量器数据并且进一步的使命(TRMM ) 数据到使用驱使一个分布式的时间变体获得模型(DTVGM ) 在中国在半潮湿的 Weihe 河集水执行水文学模拟的这个 TRMM 数据。在模拟前,比较与一 10 年(20012010 ) 设置的每日的雨计量器数据表明在每日的时间步, TRMM 降雨数据擅长比降雨极端捕获雨出现和吝啬的值。在每月的时间规模上,在 TRMM 和雨计量器降雨数据之间的好线性关系被发现,与决心系数 R < 啜 class= “ a-plus-plus ” > 为个人在 0.78 和 0.89 之间变化的 2 驻扎。每日的水文学过程上的数据的七年( 20012007 )的随后的模拟结果证实 DTVGM 什么时候由雨计量器数据校准了,比什么时候由 TRMM 数据校准更好表现,但是 TRMM 数据驾驶的模拟的性能比在每月的时间规模上由计量器数据开车的好。结果因此建议 TRMM 降雨数据对在学习的每月的流速及流水量模拟更合适区域,和那当为水平衡部件的刻度和结果的效果也被考虑时, TRMM 3B42-V7 产品有潜力表现很好在类似的盆。ZHAO Haigen 2015Journal of Geographical Sciences2015,25,2:12
3On-ramp merging strategy for connected and automated vehicles based on complete information static game显示文摘Improper handling of vehicle on-ramp merging may hinder traffic flow and contribute to lower fuel economy,while also increasing the risk of collisions.Cooperative control for connected and automated vehicles(CAVs)has the potential to significantly reduce negative environmental impact while also improve driving safety and traffic efficiency.Therefore,in this paper,we focus on the scenario of CAVs on-ramp merging and propose a centralized control method.Merging sequence(MS)allocation and motion planning are two key issues in this process.To deal with these problems,we first propose an MS allocation method based on a complete information static game whereby the mixed-strategy Nash equilibrium is calculated for an individual vehicle to select its strategy.The on-ramp merging problem is then formulated as a bi-objective(total fuel consumption and total travel time)optimization problem,to which optimal control based on Pontryagin's minimum principle(PMP)is applied to solve the motion planning issue.To determine the proper parameters in the bi-objective optimization problem,a varying-scale grid search method is proposed to explore possible solutions at different scales.In this method,an improved quicksort algorithm is designed to search for the Pareto front,and the(approximately)unbiased Pareto solution for the bi-objective optimization problem is finally determined as the optimal solution.The proposed on-ramp merging strategy is validated via numerical simulation,and comparison with other strategies demonstrates its effectiveness in terms of fuel economy and traffic efficiency.Haigen Min Yukun Fang Xia Wu Guoyuan Wu Xiangmo Zhao 2021Journal of Traffic and Transportation Engineering(English Edition)2021,8,4:5
4The effect of environmental factors on spatial variability in land use change in the high-sediment region of China's Loess Plateau显示文摘In areas with topographic heterogeneity, land use change is spatially variable and influenced by climate, soil properties, and topography. To better understand this variability in the high-sediment region of the Loess Plateau in which soil loss is most severe and sediment diameter is larger than in other regions of the plateau, this study builds some indicators to identify the characteristics of land use change and then analyze the spatial variability as it is affected by climate, soil property, and topography. We build two indicators, a land use change intensity index and a vegetation change index, to characterize the intensity of land use change, and the degree of vegetation restoration, respectively. Based on a subsection mean method, the two indicators are then used to assess the spatial variability of land use change affected by climatic, edaphic, and topographic elements. The results indicate that: 1) Land use changed significantly in the period 1998–2010. The total area experiencing land use change was 42,302 km2, accounting for 22.57%of the study area. High-coverage grassland, other woodland, and forest increased significantly, while low-coverage grassland and farmland decreased in 2010 compared with 1998. 2) Land use change occurred primarily west of the Yellow River, between 35 and 38 degrees north latitude. The four transformation types, including(a) low-coverage grassland to medium-coverage grassland,(b) medium-coverage grassland to high-coverage grassland,(c) farmland to other woodland, and(d) farmland to medium-coverage grassland, were the primary types of land use change, together constituting 60% of the area experiencing land use change. 3) The spatial variability of land use change was significantly affected by properties of dryness/wetness, soil conditions and slope gradient. In general, land use changed dramatically in semi-arid regions, remained relativelystable in arid regions, changed significantly in clay-rich soil, remained relatively stable in clay-poor soil, changed dramatically in steeper slopes, and remained relatively stable in tablelands and low-lying regions. The increase in vegetation coincided with increasing changes in land use for each physical element. These findings allow for an evaluation of the effect of the Grain to Green Program, and are applicable to the design of soil and water conservation projects on the Loess Plateau of China.LUO Ya YANG Shengtian ZHAO Changsen LIU Xiaoyan LIU Changming WU Linna ZHAQ Haigen ZHANG Yichi 2014Journal of Geographical Sciences2014,24,5:5
5Synthesis and biological evaluation of 8-substituted berberine derivatives as novel anti-mycobacterial agents显示文摘Tuberculosis(TB)is a disease which kills two million people every year and infects over one-third of the world's population.Eighteen new 8-substituted berberine derivatives were synthesized and evaluated for their anti-mycobacterial activities against M ycobacterium tuberculosis(M.tuberculosis)strain H_(37)Rv.Among these compounds,compound 6i was the most effective antitubercular agent with an MIC of 1.0μg/mL.Most importantly,compound 6i also exhibited a potent effect against clinically isolated rifampicin-and isoniazid-resistant M.tuberculosis strains,suggesting a different mode of action from the current drugs.Therefore,it shows potential for the development of new anti-TB agents.Yanxiang Wang Haigen Fu Yinghong Li Jiandong Jiang Danqing Song 2012Acta Pharmaceutica Sinica B2012,2,6:4
6Gfi1.1 regulates hematopoietic lineage differentiation during zebrafish embryogenesis显示文摘(GFI1 ) 生长因素独立 1 为成年造血的干细胞(HSC ) 的哺乳动物的淋巴细胞和 neutrophils 和维护的成熟是重要的。在胚胎的造血作用的 GFI1 的角色是很好描绘的更少。通过一幅 enhancer 陷井屏幕和生物信息学分析,我们识别了 Gfi1 (命名 gfi1.1 ) 的一个斑马鱼相当或相同的事物并且在胚胎发育期间分析了它的功能。内长的 gfi1.1 基因和在它的 genomic 地点附近插入的 GFP 记者基因的表示在斑马鱼胚胎的造血的房间被检测。Morpholino (瞬间) gfi1.1 击倒 scl, lmo2, c-myb, mpo, rag1, gata1 和血红素高山的减少的表示哈 embryonic-1 (hbae1 ) ,以及胚胎的血红素的全部的数量,而是 pu.1 和 l-plastin 的增加的表示。在一样的条件下面,瞬间注射没影响涉及的标记脉管并且专业版肾的开发。相反地,在经由信使 rna 的 gfi1.1 的表示上,注射提高了 gata1 的表示,但是禁止了 pu.1 的表示。这些调查结果建议 Gfi1.1 在调整胚胎的 erythroid 和 myeloid 系决心的平衡起一个关键作用,并且也在斑马鱼期间为淋巴细胞和 granulocytes 的区别被要求胚胎开始。Wei Wei Lu Wen Peng Huang Zheng Zhang Yuanyuan Chen An Xiao Haigen Huang Zuoyan Zhu Bo Zhang Shuo Lin 2008Cell Research2008,18,6:3
7First principles study of CuAlO_2 doping with S显示文摘We study the electronic properties of CuAlO2 doped with S by the first principles calculations and find that the band gap of CuAlO2 is reduced after the doping.At the same time,the effective masses are also reduced and the density of states could cross the Fermi level.These results show that the conductivity of CuAlO2 could be enhanced by doping the impurities of S,which needs to be further studied.GAO HaiGen 1,ZHOU Jian 1,2* & LU MingHui 1 1 National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering,Nanjing University,Nanjing 210093,China 2 Group of Computational Condensed Matter Physics,National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanjing 210093,China 2010Science China(Physics,Mechanics & Astronomy)2010,53,7:2
8News recommendation based on time factor and word embedding显示文摘Existing algorithms of news recommendations lack in depth analysis of news texts and timeliness. To address these issues, an algorithm for news recommendations based on time factor and word embedding(TFWE) was proposed to improve the interpretability and precision of news recommendations. First, TFWE used term frequency-inverse document frequency(TF-IDF) to extract news feature words and used the bidirectional encoder representations from transformers(BERT) pre-training model to convert the feature words into vector representations. By calculating the distance between the vectors, TFWE analyzed the semantic similarity to construct a user interest model. Second, considering the timeliness of news, a method of calculating news popularity by integrating time factors into the similarity calculation was proposed. Finally, TFWE combined the similarity of news content with the similarity of collaborative filtering(CF) and recommended some news with higher rankings to users. In addition, results of the experiments on real dataset showed that TFWE significantly improved precision, recall, and F1 score compared to the classic hybrid recommendation algorithm.Gu Yiran Zhou Peng Yang Haigen 2021The Journal of China Universities of Posts and Telecommunications2021,28,5:1
9Preparation and microwave absorption properties of electroless Co-Ni- P coated strontium ferrite powder 显示文摘Pan Xifeng Mu Guohong Shen Haigen 2007Applied Surface Science2007,,253:1
10Preparation, complex permittivity and permeability of the electroless Ni-P deposited strontium ferrite powder显示文摘Pan Xifeng Shen Haigen Qiu Jianxun 2007Materials Chemistry and Physics2007,101,:1
11Microwave Absorption of Nanosized Barium Ferrite Particles Pre- pared Using High-energy Ball Milling显示文摘Jianxun Qiu Haigen Shen Mingyuan Gu 2005Powder Tech- nology2005,154,:1
12A facile processing way of silica needle arrays with tunable orientation by tube arrays fabrication and etching method显示文摘Mingwei Zhu Haigen Gao Hongwei Li Jiao Xu Yanfeng Chen 2010Journal of Solid State Chemistry2010,,3:1
13Microware absorption properties of composites powders with low density显示文摘MU Guohong SHEN Haigen QIU Jianxun 2006Applied Surface Science2006,253,1:1
14Variation in rice quality of different cultivars and grain positions as affected by water management显示文摘Wangda Cheng Guoping Zhang Guoping Zhao Haigen Yao Haiming Xu 2002Field Crops Research2002,,3:1
15Variation in rice quality of different cultivars and grain positions as affected by water management显示文摘Wangda Cheng Guoping Zhang Guoping Zhao Haigen Yao Haiming Xu 2002Field Crops Research2002,,3:1
16Effects of transgenic plants on soil microorganisms显示文摘Biao Liu Qing Zeng Fengming Yan Haigen Xu Chongren Xu 2005Plant and Soil (-)2005,,1:1
17Simulation model of activity of Phrynocephalus przewalskii显示文摘Haigen Xu Fengxiang Yang 1995Ecological Modelling1995,,2:1
18Crystallo- graphic mechanism for crack propagation in the T7451 A1-Zn-Mg -Cu alloy 显示文摘Jian Haigen Jiang Feng WEI Li li 2010Materials Science and Engineering: A2010,527,2122:1
19Microwave absorption properties of Al-and Cr-substituted M-type barium hexderrite显示文摘Qiu Jianxun Gu Mingyuan Shen Haigen 2005Journal of Magnetism and Magnetic Materials2005,295,3:1
20The distribution and economic losses of alien species invasion to China显示文摘Haigen Xu Hui Ding Mingyan Li Sheng Qiang Jianying Guo Zhengmin Han Zongguo Huang Hongying Sun Shunping He Hairong Wu Fanghao Wan 2006Biological Invasions2006,,7:1
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