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Numerical simulation of the impacts of water level variation on water age in Dahuofang Reservoir

Frontiers of Earth Science 2015年第2期9卷 209-224页

作者： xinwen li Yongming SHEN State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116023 China

The transport timescales were investigated in response to water level variation under different constant flow rates in Dahuofang Reservoir. The concept of water age was applied to quantifY the transport timescales. A three-dimensional hydrodynamic model was developed based on the Environmental Fluid Dynamics Code （EFDC）. The model was calibrated for water surface elevation and temperature profiles from April 1, 2008 to October 31, 2008. Comparisons of observed and modeled data showed that the model reproduced the water level fluctuation and thermal stratification during warm season and vertical mixing during cold season fairly well. The calibrated model was then applied to investigate the response of water age to water level changes in Dahuofang Reservoir. Model results showed that water age increases from confluence toward dam zone. In the vertical direction, the water age is relatively uniform at upstream and stratifies further downstream, with a larger value at bottom layer than at surface layer. Comparisons demonstrated that water level variation has a significant impact on transport timescales in the reservoir. The impact of water level drawdown on water age is stronger at bottom layer than at surface layer. Under high flow conditions, the water age decreases 0-20days at surface layer and 15-25 days at bottom layer. Under mean flow conditions, the water age decreases 20-30 days at surface layer and 30-50 days at bottom layer. Furthermore, the impact is minor in the upstream and increases further downstream. The vertical stratification of water age weakens as the water level decreases. This study provides a numerical tool to quantify the transport timescale in Dahuofang Reservoir and supports adaptive management of regional water resources by local authorities.

关键词： water age EFDC Dahuofang Reservoir,numerical simulation water level

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Dual Bath Electrodeposition of Alternate Multilayer Coatings of Zinc and Nickel Deposits

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材料热处理学报 2004年第05B期25卷 1154-1158页

作者： xinwen-li FEIJing-yin liANGGuo-zheng DepartmentofChemicalEngineering NorthwesternPolytechnicalUniversityXi＇anChina

The synthesis of zinc and nickel alternate multilayer coatings produced by successive deposition from dual baths containing a revised zinc sulphate electrolyte and a new developed nickel bath has been investigated. Smooth and uniform zinc-nickel compositionally modulated multilayered (CMM) coatings with different multilayer configurations were obtained. The surface and cross-sectional morphologies of samples were examined using scanning electron microscopy (SEM). Cross-sectional morphology showed the layered structure of the coatings clearly.

关键词：多层镀层镍沉积锌沉积电解淀积

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Progress in study on irrigation practice with saline groundwater on sandlands of Taklimakan Desert Hinterland

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Chinese Science Bulletin 2006年第A01期51卷 161-166页

作者： XU xinwen li Bingwen WANG Xiaojing Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

分发和在在沙上使用盐的地下水的不同灌溉方法和管理下面的土壤潮湿和盐的动态变化上的学习 Taklimakan 沙漠的内地登陆，在 1997 开始了。结果显示出那滴下灌溉能被用于幼苗(沟灌溉能被使用铺平陆地) 用在在 Taklimakan 的内地沿着荒... 详细信息

分发和在在沙上使用盐的地下水的不同灌溉方法和管理下面的土壤潮湿和盐的动态变化上的学习 Taklimakan 沙漠的内地登陆，在 1997 开始了。结果显示出那滴下灌溉能被用于幼苗(沟灌溉能被使用铺平陆地) 用在在 Taklimakan 的内地沿着荒芜的高速公路构造生物的变沙控制系统的进程的盐的地下水抛弃；20 天的灌溉频率和 30 kg/m2 的灌溉数量 ????? 猠湡汤湡獤？？

关键词：地下盐水灌溉制度农田水利沙地

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Ecological stability of Tarim Desert Highway shelterbelt

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Chinese Science Bulletin 2006年第A01期51卷 153-160页

作者： ZHOU Zhibin XU xinwen LEI Jiaqiang li Shengyu Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

The Tarim Desert Highway shelterbelt, located in hinterland of Taklimakan Desert, is irrigated by underground saline water, with three to thirty gram per litter mineral degrees. The sustain-ability and stability are affected by multifarious stress. The structural and functional characteristics of shelterbelt are studied to probe into correlation between environment and shelterbelt. On basis, decision analysis is applied to study ecological stability of the Tarim Desert Highway shelterbelt, to screen out limited factors, to establish general index system, and to evaluate the stability of the shelterbelt nowadays. Finally, the concept of ecological stability is utilized to manage the artificial ecosystem. The results show that the artificial ecosystem is relatively flimsy, whose stability can be increased by adjusting stand structure and improving the nutrient cycle.

关键词：生态稳定性塔克拉玛干沙漠塔里木沙漠沙漠公路防风林决策分析

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Grain size characteristics of surface sediment and its response to the dynamic sedimentary environment in Qiantang Estuary, China

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International Journal of Sediment Research 2022年第4期37卷 457-468页

作者： Shanshan Wang Cunhong Pan Dongfeng Xie Mingwei Xu Yuhan Yan xinwen li Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design) College of Harbour Coastal and Offshore EngineeringHohai University

The composition and grain size characteristics of sediment in estuarine and coastal environments provide important information on the material source, hydrodynamic environment, environmental events,etc. However, few studies have focused on the sediment characteristics of the entire Qiantang Estuary,particularly, on the correlation between hydrodynamics and sediment properties. Through systematic sampling of the surface sediment in a large area of the Qiantang Estuary, the spatial distribution characteristics of the surface sediment of the Qiantang Estuary, such as the grain size composition and particle size parameters, in different sections of the estuary area are analyzed. By comparing the particle size data of different estuaries, the similarities and differences of the particle size parameters of the Qiantang Estuary and other estuaries are compared and analyzed. According to the differences in the sediment composition, the distribution status of the particle size frequency curves and the morphological characteristics of the probability curves in the entire study area, the Qiantang Estuary is divided into 7 dynamic depositional areas: Fuchunjiang Hydropower Station-Fuyang, Fuyang-Qibao, Qibao-Cao’e River, Cao’e River-Zhapu, North Shore of Hangzhou Bay, middle part of Hangzhou Bay, and South Shore of Hangzhou Bay, which are different from the previous estuary segmentation system. The study area is divided into 13 dynamic depositional sub-regions using the Pejrup M triangle diagram. Combining the calculation results of the mathematical model and the Pejrup M triangle diagram, the relation between the dynamic deposition environment and the bottom shear stress is discussed. It is found that the spatial distribution of the bottom shear stress in the study area is in good agreement with the zoning of the dynamic sedimentary environment.

关键词： Qiantang Estuary Surface sediment Grain size parameter characteristics Dynamic sedimentary environment

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Influencing factors on hydrodynamic lubrication failure of upstream pumping mechanical seal

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排灌机械工程学报 2018年第6期36卷 509-516页

作者： CHEN Huilong li xinwen WANG Bin WU Qiangbo REN Kunteng li Tong ZHAO Binjuan School of Energy and Power Engineering Jiangsu University Zhenjiang Jiangsu 212013 China

Considering the effect of viscosity-temperature relationship and cavitation of micro-scale film,the influencing factors on hydrodynamic lubrication performance of upstream pumping mechanical seal were investigated based on the theory of hydrodynamic lubrication.N-S equation,energy equation,viscosity-temperature equation and vapor transport equation were solved with the finite volume method by using Fluent software,which was performed to analyze the influence of the viscosity-temperature and cavitation effect on hydrodynamic lubrication failure of the *** research demonstrates that it will lead to the significant difference of the temperature field by considering the coupling of temperature and *** the film thickness decreases and the rotating speed rises,cavitation regions and viscous friction heat increases,the opening force of the film is also ***,the growth rate is restricted to the cavitation regions and viscous friction heat,and the opening force begins to decline to a certain extent,and thereby being insufficient to open the surfaces of the seals and leading to the failure of automatic adjustment function and severe wear,lubrication failure *** comprehensive research on the influences of viscosity-temperature and cavitation effect on hydrodynamic lubrication performance,the theories of failure and design of upstream pumping mechanical seal are further developed.

关键词： mechanical seal hydrodynamic lubrication viscosity-temperature effect cavitation effect lubrication failure computational fluid dynamics

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The Structure and Protective Properties of Zinc and Nickel Alternate Electrodeposits

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材料热处理学报 2004年第05B期25卷 1142-1145页

作者： FEIJing-yin liANGGuo-zheng xinwen-li MAXiao-yan ZHUGuang-ming DepartmentofChemicalEngineering NorthwesternPolytechnicalUniversityXi＇an.China

The electrodeposition of coatings consisting of alternate zinc and nickel deposits produced by successive deposition from a revised zinc sulphate electrolyte and a new developed nickel bath has been investigated. Coated samples have been evaluated in terms of surface appearance, surface morphologies and cross-sectional morphologies using scanning electron microscopy (SEM). The corrosion resistance of laminar coatings has been studied by means of salt spray accelerated testing and anodic polarization measurement. The results obtained showed that the corrosion performance of zinc-nickel laminar coatings was better than that of a single-layer zinc or nickel deposit with the same thickness, and the coatings with nickel sublayer adjacent to the steel substrate and zinc as the top layer had the best corrosion resistance. These results were in good agreement with the characteristics indicated in the morphologies of zinc-nickel laminar coatings after anodic polarisation measurement.

关键词：电引发聚合层状涂层耐蚀性锌镍

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Study on the Quality of NILs of Wheat cv. Longfumai 3 Possessing HMW-GS Null and 1 Subunits

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Agricultural Sciences in China 2008年第2期7卷 140-147页

作者： ZHANG li-li ZHANG Yan-bin SONG Qing-jie ZHAO Hai-bin YU Hai-yang ZHANG Chun-lixinwen-li2 and XIAO Zhi-min2 xinwen-li XIAO Zhi-min College of life and Environment Science Harbin Normal University Harbin 150025 P.R.China Crop Breeding Institute Heilongjiang Academy of Agricultural Sciences Harbin 150086 P.R.China

To determine the genetic differences between high molecular weigh glutenin subunits （HMW-GS） null and 1. HMW-GS 1 was introduced into Longfumai 3 （N, 7＋8, 5＋10） by 5 consecutive backcrosses with biochemical marker assisted selection. The near isogenic lines （NILs） of HMW-GS null and 1 were obtained and planted in the experimental field of Crop Breeding Institute of Heilongjiang Academy of Agricultural Science in 2004 and 2005. The field experiments were designed using the method of two-line contrast arrangement with four replicates. The result of two years experiment showed that the statistic differences of quality parameters between Longfumai 3 with subunit 1 and with null were not significant in flour protein content, dry gluten content, and water absorption. However the gluten index,＇ Zeleny sedimentation, the ratio of sedimentation/dry gluten, the development time, stability, and the breakdown time in the NIL with 1 subunit were increased by 5.8% （P〈0.01）, 9.3% （P〈0.01）, 8.6% （P=0.01）, 127.3% （P〈0.01）, 79.2% （P〈0.01）, and 53.6% （P〈0.01）, and the ratio of wet gluten/dry gluten and the degree of softening were decreased by 1.7% （P = 0.05） and 16.5% （P = 0.13）, respectively. The impact of the HMW-GS 1 on the gluten strength was highly positive in NILs containing HMW-GS 5 ＋ 10, suggesting that HMW-GS 1 can be an indispensable subunit for breeding strong gluten wheat.

关键词： wheat quality gluten near-isogenic lines (NILs)

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Application and Prospect of Cold Hoop Confining Method in Psoriasis from Dermatopathology in Integrated Chinese and Western Medicine

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Medicinal Plant 2021年第4期12卷 40-41页

作者： xinwen li Bin ZHANG Qingchun DIAO Xiangyu HU Department of Dermatology Chongqing Hospital of Traditional Chinese MedicineChongqing 400000China

In the pathological changes of psoriasis vulgaris,excessive proliferation of keratinocytes,proliferation of microvessels,infiltration of a large number of inflammatory cells,and great shortening of epidermal replacement time,are the manifestations of Qi and Yin depletion,and they all correspond with pathological changes of nutrient Qi and blood deficiency caused by excessive *** treatment of psoriasis should focus on cold straight fire,convergence and ***,it is feasible to treat psoriasis with hoop in theory,and it is found that"cold hoop confining medicine"may be more suitable for the treatment of psoriasis vulgaris in the gradual progress of the *** research could provide theoretical basis for the application of cold hoop confining medicine represented by brusatol in psoriasis vulgaris and related diseases.

关键词： Psoriasis vulgaris Cold hoop confining method Brusatol Dermatopathology

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Comparison of Highly Differential Cross Sections between Experimental Results and Theory

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 126-127页

作者： Ma xinwen Zhu Xiaolong li Bin liu Huipin

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