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中国四大城市群水资源生态足迹比较

人民长江 2024年第2期55卷 109-115页

作者：李菊云南开放大学城市建设学院云南昆明650223

城市群的可持续发展是国家经济社会发展和实现人与自然和谐共生的重要基础,而水资源成为制约城市群发展的关键因素。为推进城市群水资源科学利用,基于水资源生态足迹理论,利用中国四大城市群(京津冀、长三角、珠三角和成渝城市群)2012~2... 详细信息

城市群的可持续发展是国家经济社会发展和实现人与自然和谐共生的重要基础,而水资源成为制约城市群发展的关键因素。为推进城市群水资源科学利用,基于水资源生态足迹理论,利用中国四大城市群(京津冀、长三角、珠三角和成渝城市群)2012~2021年水资源和社会经济发展相关数据,对比分析了地区水资源可持续利用状况。结果表明:①四大城市群10 a来人均水资源、人均生产用水生态足迹呈下降趋势,人均生活、人均生态用水生态足迹呈上升趋势。3种用水生态足迹中,人均生产用水生态足迹占比超过50%,人均生态用水生态足迹占比不足20%。②长三角城市群人均水资源及人均生产用水生态足迹最高,京津冀城市群最低;2015年后成渝城市群的人均水资源、人均生产用水及人均生活用水生态足迹均超过珠三角城市群。③京津冀城市群人均水资源承载力远远低于其他城市群,而人均水资源压力指数及人均生产、生活、生态用水压力指数远远高于其他城市群;2017年后成渝城市群的人均水资源承载力超过珠三角城市群。④研究年份内京津冀城市群均处于生态赤字状态;珠三角、成渝城市群水资源为生态盈余状态,长三角城市群总体为生态盈余状态。⑤随着水资源利用效率的提高,所有城市群万元GDP水资源生态足迹整体呈下降趋势。研究成果可为城市群科学利用水资源、推动城市群绿色均衡发展提供参考。

关键词：水资源水生态足迹生态承载力生态盈余生态压力城市群

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On Translation of Children’s literature Based on Reception Aesthetics:A Case Study of The Secret Garden

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Journal of literature and Art Studies 2024年第3期14卷 194-200页

作者： HOU Wen-lan li ju-yuan School of Foreign Studies Guangzhou UniversityGuangzhouChina

Grounded in reader-centered theories,Reception Aesthetics prioritizes the active engagement and acceptance of target *** study examines the translation of children’s literature through the lens of Reception Aesthetics,using li Wenjun’s rendition of The Secret Garden as a case *** objective is to scrutinize various aspects of the translation-including vocabulary,syntax,rhetorical devices,and cultural nuances-and to discern how the adaptation and application of diverse translation strategies cater to the aesthetic expectations.

关键词： Reception Aesthetics translation of children’s literature The Secret Garden

On the Preconditioning Properties of RHSS Preconditioner for Saddle-Point linear Systems

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Communications on Applied Mathematics and Computation 2021年第1期3卷 177-187页

作者： ju-li Zhang School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China

In this paper,for the regularized Hermitian and skew-Hermitian splitting(RHSS)preconditioner introduced by Bai and Benzi(BIT Numer Math 57:287–311,2017)for the solution of saddle-point linear systems,we analyze the spectral properties of the preconditioned matrix when the regularization matrix is a special Hermitian positive semidefinite matrix which depends on certain *** accurately describe the numbers of eigenvalues clustered at(0,0)and(2,0),if the iteration parameter is close to *** estimate about the condition number of the corresponding eigenvector matrix,which partly determines the convergence rate of the RHSS-preconditioned Krylov subspace method,is also studied in this work.

关键词： Saddle-point linear systems RHSS preconditioner Preconditioning properties Matrix similar transformation Condition number of eigenvector matrix

浓缩生长因子(CGF)的基础研究及临床应用进展

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中国美容整形外科杂志 2024年第8期35卷 505-508,I0009页

作者：程浩李菊赵勇李焰成都医学院第一附属医院医疗美容科四川成都610000 成都医学院第一附属医院口腔科四川成都610000

浓缩生长因子(concentrated growth factors,CGF)是第3代血小板浓缩物,一种通过特定的离心程序从患者自身的全血中提取出来的血小板富集物,含有大量的生长因子和细胞因子.CGF可以促进伤口愈合、提高移植物的成活率、刺激组织再生等.近年... 详细信息

浓缩生长因子(concentrated growth factors,CGF)是第3代血小板浓缩物,一种通过特定的离心程序从患者自身的全血中提取出来的血小板富集物,含有大量的生长因子和细胞因子.CGF可以促进伤口愈合、提高移植物的成活率、刺激组织再生等.近年来,CGF在口腔外科、整形外科、皮肤科等领域均得到了广泛的应用.现就CGF的成分、生物学效应和临床应用作一综述.

关键词：浓缩生长因子血小板浓缩物生物学效应临床应用

高频振荡通气联合西地那非治疗新生儿持续性肺动脉高压的有效性及不良反应分析

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当代医学 2024年第4期30卷 74-77页

作者：李晓琳李举郭磊平邑县人民医院新生儿科山东临沂273300

目的探讨高频振荡通气联合西地那非治疗新生儿持续性肺动脉高压(PPHN)的效果。方法选取2020年1月至2021年12月平邑县人民医院收治的80例PPHN新生儿作为研究对象,采用奇偶数法分为研究组与对照组,每组40例。对照组采用高频振荡通气治疗,... 详细信息

目的探讨高频振荡通气联合西地那非治疗新生儿持续性肺动脉高压(PPHN)的效果。方法选取2020年1月至2021年12月平邑县人民医院收治的80例PPHN新生儿作为研究对象,采用奇偶数法分为研究组与对照组,每组40例。对照组采用高频振荡通气治疗,研究组采用高频振荡通气联合西地那非治疗。比较两组临床疗效、血气指标及不良反应发生率。结果研究组治疗总有效率为92.50%,高于对照组的72.50%,差异有统计学意义(P<0.05)。治疗后,两组动脉血氧分压(PaO_(2))、动脉血氧饱和度(SaO_(2))水平均高于治疗前,动脉血二氧化碳分压(PaCO_(2))水平低于治疗前,且研究组PaO_(2)、SaO_(2)水平均高于对照组,PaCO_(2)水平低于对照组,差异有统计学意义(P<0.05)。治疗后,两组肺动脉压(PAP)均低于治疗前,心率(HR)均慢于治疗前,且研究组PAP低于对照组,HR慢于对照组,差异有统计学意义(P<0.05),而两组治疗前后体循环血压(SBP)组内及组间比较差异无统计学意义。两组不良反应发生率比较差异无统计学意义。结论高频振荡通气联合西地那非治疗PPHN效果佳,可改善血气指标,且不增加不良反应发生风险。

关键词：新生儿持续性肺动脉高压高频振荡通气西地那非疗效不良反应

A Novel Carbon Nanotube-Supported NiP Amorphous Alloy Catalyst and Its Hydrogenation Activity

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Journal of Natural Gas Chemistry 2006年第4期15卷 313-318页

作者： Yan ju Fengyi li Department of Chemistry Nanchang University Nanchang 330031 Jiangxi China

A carbon nanotube-supported NiP amorphous catalyst （NiP/CNT） was prepared by induced reduction. Benzene hydrogenation was used as a probe reaction for the study of catalytic activity. The effects of the support on the activity and thermal stability of the supported catalyst were discussed based on various characterizations, including XRD, TEM, ICP, XPS, H2-TPD, and DTA. In comparison with the NiP amorphous alloy, the benzene conversion on NiP/CNT catalyst was lower, but the specific activity of NiP/CNT was higher, which is attributed to the dispersion produced by the support, an electron-donating effect, and the hydrogen-storage ability of CNT. The NiP/CNT thermal stability was improved because of the dispersion and electronic effects and the good heat-conduction ability of the CNT support.

关键词： carbon nanotube catalyst support catalytic property Ni P hydrogenation benzene

Analysis of observations on the urban surface energy balance in Beijing

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Science China Earth Sciences 2012年第9期55卷 1881-1890页

作者： MIAO ShiGuang DOU junXia CHEN Fei li ju li AiGuo Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China National Center for Atmospheric Research BoulderCO 80307-3000USA Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

The 1-year（2009-2010） measurements are analyzed of the urban surface energy balance（SEB） obtained from the sensors located at three vertical layers of a 325-m tower in downtown *** show that：（1） The measurements from the 325-m tower represent the SEB characteristics of the cities located in semi-humid warm-temperate continental monsoon climate *** a typical hot and rainy summer,cold and dry winter,the measured Bowen ratio is minimum in summer and maximum in *** Bowen ratio measured at 140 m for spring,summer,autumn,and winter are 2.86,0.82,1.17,and 4.16 respectively.（2） At the height of 140-m（in the constant flux layer）,the noontime albedo is ~0.10 for summer,~0.12 for spring and autumn,and ~0.14 for *** ratios of daytime sensible heat flux,latent heat flux,and storage heat flux to net radiation are 0.25,0.16,and 0.59 for clear-sky days,and 0.33,0.19,and 0.48 for cloudy days respectively.（3） Under clear-sky days,the nighttime sensible heat flux is almost zero,but the latent heat flux is greater than *** cloudy days,the nighttime sensible heat flux is slightly greater than the latent heat flux in *** nighttime upward heat flux is presumably due to the anthropogenic release（mainly latent heat for summer,while latent and sensible heat for winter）.

关键词： urban surface energy balance tower based observation eddy covariance technique Bowen ratio anthropogenic heat flux

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Advances in Compact Manufacturing for Shape and Performance Controllability of Large-scale Components-A Review

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Chinese Journal of Mechanical Engineering 2017年第1期30卷 7-21页

作者： QIN Fangcheng li Yongtang QI Huiping ju li School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

Research on compact manufacturing technology for shape and performance controllability of metallic components can reanze the simplification and high-reliability of manufacturing process on the premise of satisfying the requirement of macro/micro-structure. It is not only the key paths in improving performance, saving material and energy, and green manufacturing of components used in major equipments, but also the challenging subjects in frontiers of advanced plastic forming. To provide a novel horizon for the manufacturing in the critical components is significant. Focused on the high-performance large-scale components such as bearing rings, flanges, railway wheels, thick-walled pipes, etc, the conventional processes and their developing situations are summarized. The existing problems including multi-pass heating, wasting material and energy, high cost and high-emission are discussed, and the present study unable to meet the manufacturing in high-quality components is also pointed out. Thus, the new techniques related to casting-rolling compound precise forming of rings, compact manufacturing for duplex-metal composite rings, compact manufacturing for railway wheels, and casting-extruding continuous forming of thick-walled pipes are introduced in detail, respectively. The corresponding research contents, such as casting ring blank, hot ring rolling, near solid-state pressure forming, hot extruding, are elaborated. Some findings in through-thickness microstructure evolution and mechanical properties are also presented. The components produced by the new techniques are mainly characterized by fine and homogeneous grains. Moreover, the possible directions for fin＇ther development of those techniques are suggested. Finally, the key scientific problems are first proposed. All of these results and conclusions have reference value and guiding significance for the integrated control of shape and performance in advanced compact manufacturing.

关键词： compact manufacturing shape and performance controllability high-performance ring parts thick-walled pipes

Abnormal nonlinear optical responses on the surface of topological materials

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npj Computational Materials 2022年第1期8卷 1045-1052页

作者： Haowei Xu Hua Wang ju li Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA02139USA Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA02139USA

The nonlinear optical(NLO)responses of topological materials are under active *** previous works studied the surface and bulk NLO responses *** we develop a generic Green’s function framework to investigate the surface and bulk NLO responses *** reveal that the topological surface can behave disparately from the bulk under light ***,the photocurrents on the surface can flow in opposite directions to those in the bulk interior,and the light-induced spin current on the surface can be orders of magnitude stronger than its bulk counterpart on a per-volume *** also study the responses under inhomogeneous field and higher-order NLO effect,which are all distinct on the *** anomalous surface responses suggest that light can be a valuable tool for probing the surface states of topological ***,the surface effects should be prudently considered when investigating the optical properties of topological materials.

关键词： materials. surface. topological