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Changes in groundwater levels and the response of natural vegetation to transfer of water to the lower reaches of the Tarim River

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Journal of environmental Sciences 2007年第10期19卷 1199-1207页

作者： XU Hai-liang ye mao LI Ji-mei Xinfiang Institute of ecology and Geography Research Chinese Academic of Science Urumqi 830011 China School of Geography Sciences and Touristy Xinfiang Normal University Urumqi 830054 China

Restoration and reconstruction of the degraded Tarim River ecosystem is an important challenge. A goal of an ecological water conveyance project is to protect and restore the natural vegetation in the lower reaches of Tadm River by transferring water from Bosten Lake, through the river channel, to the lower reaches. This study describes the changes in groundwater depth during the water transfer and the respondence of riparian vegetation to alterations in groundwater levels. The results indicate that groundwater depth along the Tarim River channel has a significant spatial-temporal component. Groundwater levels closest to the river channel show the most immediate and pronounced changes as a response to water transfer while those further away respond more slowly, although the observed change appears to be longer in duration. With a rise in the groundwater level, natural vegetation responded with higher growth rates, biomass and biodiversity. These favorable changes show that it is feasible to protect and restore the degraded natural vegetation by raising the groundwater depth. Plant communities are likely to reflect the hysteresis phenomenon, requiting higher water levels to initiate and stimulate desired growth than what may be needed to maintain the plant community. Because different species have different ecologies, including different root depths and densities and water needs, their response to increasing water availability will be spatially and temporally heterogenous. The response of vegetation is also influenced by microtopography and watering style. This paper discusses strategies for the protection and restoration of the degraded vegetation in the lower reaches of the Tarim River and provides information to complement ongoing theoretical research into ecological restoration in add or semi-arid ecosystems.

关键词： the lower reaches of Tarim River ecological watering conveyance groundwater depth ecological response natural vegetation

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Review of precipitation strengthening in ultrahigh-strength martensitic steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 256-269页

作者： Zhihao Tian Chunlei Shang Chaolei Zhang Xiaoye Zhou Honghui Wu Shuize Wang Guilin Wu Junheng Gao Jiaming Zhu Xinping mao Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Institute of Steel Sustainable technology Liaoning Academy of MaterialsShenyang 110004China Department of Materials Science and engineering Shenzhen MSU-BIT UniversityShenzhen 518172China Institute of Materials Intelligent technology Liaoning Academy of MaterialsShenyang 110004China School of Civil engineering Shandong UniversityJinan 250061China

Martensite is an important microstructure in ultrahigh-strength steels,and enhancing the strength of martensitic steels often involves the introduction of precipitated phases within the martensitic *** considerable research efforts devoted to this area,a systematic summary of these advancements is *** review focuses on the precipitates prevalent in ultrahigh-strength martensitic steel,primarily carbides(e.g.,MC,M_(2)C,and M_(3)C)and intermetallic compounds(e.g.,Ni Al,Ni_(3)X,and Fe_(2)Mo).The precipitation-strengthening effect of these precipitates on ultrahigh-strength martensitic steel is discussed from the aspects of heat treatment processes,microstructure of precipitate-strengthened martensite matrix,and mechanical ***,a perspective on the development of precipitation-strengthened martensitic steel is presented to contribute to the advancement of ultrahigh-strength martensitic *** review highlights significant findings,ongoing challenges,and opportunities in the development of ultrahigh-strength martensitic steel.

关键词： ultrahigh-strength martensitic steel precipitation strengthening mechanical property carbide intermetallic compound

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texture property and weakening mechanism of Mg-3Al-1Zn alloy by interactive alternating forward extrusion

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Journal of Magnesium and Alloys 2023年第2期11卷 684-693页

作者： ye Wang Feng Li Yu Wang Xing mao Xiao School of Materials Science and engineering Harbin University of Science and TechnologyHarbin 150040P R China Key Laboratory of Advanced Manufacturing and Intelligent technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080P R China Southwest technique and engineering Reasearch Institute Chongqing 400039P R China

The interactive alternating forward extrusion(AFe) method can realize the change of texture type and the weakening of texture *** AZ31 magnesium alloy as an example, the texture evolution of interactive AFe was studied. The results show that all kinds of dynamic recrystallization(DRX) behaviors can weaken the texture to vary degrees. The weakening effect of twinning-induced recrystallization(TDRX)behavior was particularly significant. During the interactive AFe process, the c-axis of most grains rotated under the external force, and tended to be 90° angle with the eD direction, forming a stable fiber texture. In addition, with the increase of loading passes, the starting of {0001} basal slip system became more and more difficult. The(10–10) texture formed by {10–10} prismatic slip system after sixth passes was the main texture type. With the increase of forming temperature, the starting ability of {10–10} prismatic slip systems increased, and the(10–10) texture formed by prismatic slip system above 623 K dominated.

关键词： Magnesium alloy Alternating extrusion texture Recrystallization Grain orientation

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CARBON eMISSION-BASeD MeASUReMeNT OF FLOOR AReA RATIO BONUS FOR ReSIDeNTIAL GReeN BUILDINGS IN CHINA

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Journal of Green Building 2018年第2期13卷 84-97页

作者： Yanhui mao Xuemei Gong Yun ye Institute of Civil engineering Ningbo University of TechnologyNingboZhejiang315000China Zhejiang Housing New energy technology Development Co. Ltd.

Green building development in China relies mainly on compulsory measures that lack incentive policies to motivate the enthusiasm of real estate developers.A floor area ratio bonus is encouraged by the Chinese State *** order to ensure the feasibility of a reward quota,residential buildings that met the requirement for energy efficiency during the official assessment in Ningbo in 2014 were selected as research *** amount of energy and water savings in terms of the Assessment Standard for Green Building is converted into carbon *** emissions of different star-rated green buildings are then measured in accordance with the actual water and power consumption of residential dwellings in 2014.A regression equation is set up concerning the floor area ratio and index for residential land per capita.A carbon emission-based method is proposed for measuring the reward quota associated with floor area ratio and recommendations are given for development using green building.

关键词： green building carbon emission index for residential land per capita floor area ratio

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The utilization of water resources and its variation tendency in Tarim River Basin

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Chinese Science Bulletin 2006年第A01期51卷 16-24页

作者： ye mao XU Hailiang SONG Yudong Xinjiang Institute of ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

水资源有效利用在 Tarim 是生态的改进和经济开发的关键河盆。在整个河盆分析水资源利用和它的变化趋势是必要的。在八个气象学的车站和十五个水文学车站基于监视数据和形成，时间系列的方法，回归分析被用于在特别在源流和主流的区域... 详细信息

水资源有效利用在 Tarim 是生态的改进和经济开发的关键河盆。在整个河盆分析水资源利用和它的变化趋势是必要的。在八个气象学的车站和十五个水文学车站基于监视数据和形成，时间系列的方法，回归分析被用于在特别在源流和主流的区域分析水资源利用和变化趋势最近 10 年。量的结果显示源流区域的流入在过去的 40 年里有一个增加的趋势到不同程度。增加趋势的流量从 1994 ～ 2002 是更重要的，它证明在源流的水资源条件在一个优点。然而，与 25 的体积在水的条件下面增加#

关键词：新疆塔里木盆地水资源肯德尔测序

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Research on carbon and oxygen isotopes in phosphorus-bearing rock series of the Late Neoproteroic-early Cambrian Taozichong Formation in Qingzhen City, Guizhou Province, Southwest China

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Chinese Journal Of Geochemistry 2014年第4期33卷 439-449页

作者： mao Tie YANG Ruidong mao Jiaren ye Chun LIU Kun GAO Junbo College of Resources and environmental engineering Guizhou University Guizhou Mining Right Reserve & Trading Bureau

In the study of the phosphate-bearing stratum at the bottom of the Cambrian system, the authors found that there occurred carbon isotope negative anomalies in the Taozichong section phosphate-bearing stratum in Qingzhen, Guizhou Province; they can be correspondingly compared with other synsedimentary carbon isotope negative anomalies both at home and abroad. The results showed that there occurred three negative anomalies of carbon isotopes in the Neoproterozoic-early Cambrian Taozichong Formation, indicating that the temporal palaeo-oceanographical environment changed significantly, in which there happened two times of intensive carbon isotope variation, corresponding to creature extinction. Meanwhile, it is believed that the carbon isotope negative anomalies in phosphorites were caused by the ascending water mass of ocean current with the negative carbon isotopic composition of deep-ocean hydrothermal deposits.

关键词：碳同位素磷酸盐清镇市贵州省早寒武世中国西南氧同位素岩系

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Forty years of business research in China:a critical reflection and projection

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Frontiers of Business Research in China 2018年第4期12卷 323-330页

作者： Ji-ye mao Business School Renmin University of ChinaBeijing 100872China

Indigenous business research has largely mirrored the economic growth in China over the past 40 years, which has reached a critical juncture. It is, therefore, important to take stock of the past progress to identify critical success factors and remaining challenges, in searching for paths to the next leap forward. To this end, this commentary will first review the key milestones in indigenous business research over the past four decades. Then it will highlight two paradoxes, namely, the lack of indigenous theories despite the phenomenal growth of Chinese firms, and the growing divergence between scientific rigor and low relevance to practice, which will need to be addressed in the future. Lastly, several predications and suggestions will be offered.

关键词： Indigenous business research Contextualized research Business research in China

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HYDRAULIC CHARACteRISTICS OF VeRTICAL VORteX AT HYDRAULIC INTAKeS

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Journal of Hydrodynamics 2007年第2期19卷 143-149页

作者： CHeN Yun-liang WU Chao ye mao JU Xiao-ming State Key Laboratory of Hydraulics and Mountain River engineering Sichuan University Chengdu 610065China College of Hydraulic and Hydroelectric engineering Sichuan University Chengdu 610065 China

The trace of vertical vortex flow at hydraulic intakes is of the shape of spiral lines, which was observed in the presented experiments with the tracer technique. It represents the fluid particles flow spirally from the water surface to the underwater and rotate around the vortex-axis multi-cycle. This process is similar to the movement of screw. To describe the multi-circle spiral characteristics under the axisymmetric condition, the vertical vortex would change not only in the radial direction but also in the axial direction. The improved formulae for three velocity components for the vertical vortex flow were deduced by using the method of separation of variables in this article. In the improved formulae, the velocity components are the functions of the radial and axial coordinates, so the multi-circle spiral flow of vertical vortex could be simulated. The calculated and measured results for the vertical vortex flow were compared and the causes of errors were analyzed.

关键词： vertical vortex tracer technique multi-circlespiral flow separation of variables

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Recent progress on betulinic acid and its derivatives as antitumor agents:a mini review

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Chinese Journal of Natural Medicines 2021年第9期19卷 641-647页

作者： ZHONG ye LIANG Nan LIU Yang CHeNG mao-Sheng Key Laboratory of Structure-Based Drug Design&Discovery of Ministry of education School of Pharmaceutical EngineeringShenyang Pharmaceutical UniversityShenyang 110016China

Natural products are one of the important sources for the discovery of new *** acid(BA),a pentacyclic triterpenoid widely distributed in the plant kingdom,exhibits powerful biological effects,including antitumor activity against various types of cancer cells.A considerable number of BA derivatives have been designed and prepared to remove their disadvantages,such as poor water solubility and low *** review summarizes the current studies of the structural diversity of antitumor BA derivatives within the last five years,which provides prospects for further research on the structural modification of betulinic acid.

关键词： Betulinic acid Natural products Structural modification Derivatives Antitumor activity

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Understanding the Moon's internal structure through moonquake observations and remote sensing technologies

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Science China earth Sciences 2018年第8期61卷 995-1006页

作者： Weifeng HAO Fei LI Chi XIAO Jianguo YAN mao ye Chinese Antarctic Center of Surveying and Mapping Wuhan University State Key Laboratory of Information engineering in Surveying Mapping and Remote Sensing Wuhan University

explorations for the interior structure of the Moon mainly involve three technologies: the early gravitational observations via circumlunar satellites, the moonquake observations during the Apollo period, and the recent high-resolution remote sensing observations. Based on these technologies, we divided the development of the moon's interior structure into three stages. The first stage is the discovery of high-density anomalous masses(mascons) on the lunar surface with the low-order gravitational field models, which were obtained by observing perturbations of the early lunar orbital satellites. The second stage is the preliminary understanding of the layer structure with the help of moonquake observations during the Apollo period. The third stage is the deep understanding of the structure of the lunar crust, mantle, and core, with the use of high-resolution remote sensing data and the reassessment of moonquake data from the Apollo's mission. This paper gave detailed introduction and comments on different observation technologies, gathered data, and data processing techniques used at the three stages. In addition, this paper analyzed the current issues in the researches on the Moon's internal structure and discussed the prospects for future explorations.

关键词： Moon Mascon Moonquake Remote sensing Lunar internal structure

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