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Spatial and temporal variations of gross primary production simulated by land surface model BCC_AVIM2.0

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Advances in Climate Change Research 2023年第2期14卷 286-299页

作者： Wei-Ping LI yan-Wu ZHANG Mingquan MU Xue-Li SHI wen-yan zhou Jin-Jun JI Earth System Modeling and Prediction Centre China Meteorological AdministrationBeijing 100081China State Key Laboratory of Severe Weather(LaSW) China Meteorological AdministrationBeijing 100081China Department of Earth System Science University of CaliforniaIrvine CA 92697-3100USA Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

Gross primary production(GPP)is the largest flux and a crucial player in the terrestrial carbon cycle and has been studied extensively,yet large uncertainties remain in the spatiotemporal patterns of GPP in both observations and *** study evaluates the performance of the second version of the Beijing Climate Center Atmosphere−Vegetation Interaction Model(BCC_AVIM2.0)in simulating GPP on multiple spatial and temporal scales in the Coupled Model Intercomparison Project Phase 6(CMIP6)*** simulations driven by two meteorological datasets were compared with two observation-based GPP products covering 1982–*** patterns of annual GPP show a significant latitudinal gradient in each dataset,increasing from cold(tundra)and dry(desert)biomes to warm(temperate)and humid(tropical rainforest)***_AVIM2.0 overestimates GPP in most parts of the globe,especially in boreal forest regions and Southeast China,while underestimating GPP in subhumid regions in eastern South America and tropical *** four datasets broadly agree on the GPP seasonal cycle,but BCC_AVIM2.0 predicts an earlier beginning of spring growth and a larger amplitude of seasonal variations than those in the *** observation-based datasets exhibit slight interannual variability(IAV)and weak GPP linear trends,while the BCC_AVIM2.0 simulations demonstrate relatively large year-to-year variability and significant trends in the low-latitudes and temperate monsoon regions in North America and East *** the possible relationships between annual means of GPP and climate factors,BCC_AVIM2.0 predicts more extensive regions of the globe where the IAV of annual GPP is dominated by precipitation,especially in mid-to-high latitudes of the Northern Hemisphere and tropical Africa,while the observed GPP in the above regions is temperature-or *** positive GPP biases due to earlier spring growth in boreal forest regions and negative GPP biases in off

关键词： Gross primary production Seasonal cycle Interannual variability Trend Land surface model CMIP6

Characteristics of the Structure and Properties of ZnSnO3 Films by Varying the Magnetron Sputtering Parameters

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Acta Metallurgica Sinica(English Letters) 2016年第9期29卷 827-833页

作者： Fa-Yu Wu Jian-Wei Li Yi Qi Wu-Tong Ding Yuan-Yuan Guo yan-wen zhou Laser Advanced Manufacturing Technology Center School of Materials and Metallurgy University of Science and Technology Liaoning Anshan 114051 China SINOTRUK (Hong Kong) Limited Jinan Casting and Forging Center Zhangqiu 250200 China School of Material Science and Engineering Shenyang University of Technology Shenyang 110870 China

Transparent conductive oxide ZnSnO3 films were prepared by radio-frequency magnetron sputtering from powder targets and were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, atomic force microscopy, surface profile, UV-Vis spectroscopy, and Hall effect. The structures of the films were either amorphous or nanocrystalline depending on sputtering parameters including deposition time, target power, chamber pressure, and the target-substrate separation. The average transmittance of the ZnSnO3 films within the visible wavelength was approximately 80% and the resistivity of the ZnSnO3 films was in the range of 10^-3-10^-4 Ω cm. The structural, optical, and electrical properties of the ZnSnO3 films could be adjusted and regulated by optimizing the sputtering process, allowing materials with specific properties to be designed.

关键词： ZnSnO3 film Powder target Magnetron sputtering Optical property Electrical property

Surface modification of 316L stainless steeldiamond-like carbon films

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Journal of Iron and Steel Research International 2020年第7期27卷 867-874页

作者： Rui-wu Li Zheng Zhang Jian-wei Li Ke-xin Ma Yuan-yuan Guo yan-wen zhou Fa-yu Wu School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051LiaoningChina Liaoning Censcience Industrial Co. Ltd.Research and Design InstituteLiaoyang 111200LiaoningChina

The diamond-like carbon(DLC)film on 316L stainless steel substrate was preparedpulsed plasma-enhanced chemical vapor deposition,and the performance of the films was optimizedregulating the pulse *** and properties of DLC film on 316L stainless steel were characterizedatomic force microscopy,field-emission scanning electron microscopy,Raman spectra,nano-indenter and electrochemical *** results showed that DLC films with smooth and dense morphology have a low friction coefficient and high nano-indentation hardness,and the surface hardness of 316L stainless steel substrate was enhancedmore than 3 *** mechanical properties of DLC films and their bond with 316L stainless steel could be further optimizedincreasing pulse *** films on 316L stainless steel substrate increased the self-corrosion potential0.173 V and decreased self-corrosion current99%,which significantly improved the anti-corrosive properties of 316L substrate.

关键词： 316L stainless steel Diamond-like carbon film Plasma enhanced chemical vapor deposition Frictional wear Nano-indentation Corrosion resistance

The Service Utility Model in Service Management

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The Journal of China Universities of Posts and Telecommunications 2005年第4期12卷 21-25页

作者： LI yan zhou wen-an SONG Jun-de PCN & CAD Center Beijing University of Posts & Telecommunication Beijing 100876 P.R. China

Aiming to provide a measurable service Quality of Service （ QoS） evaluating method for service inventory management, this paper proposes a new mobile Service Utility Model （SUM）, considers the service and business layer elements into the service utility influence profile, and proposes an self-adaptive service inventory management algorithm as a QoS control scheme based on SUM. It can be concluded from the simulation result that the service inventory utility can be fully reflected by SUM and the whole system efficiency is greatly increased by using SUM as the adaptive rule.

关键词： service QoS control service utility service management evaluating adaptive inventory allocating

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用灰色聚类方法对旧建筑物结构安全性的评定

西安科技大学学报 2009年第1期29卷 122-126页

作者：闫文周刘波西安建筑科技大学管理学院陕西西安710055

近年来,我国旧建筑物已达到相当规模。为减少盲目地选择拆除或不加科学决策的维修改造造成的浪费,必须对旧建筑物结构安全性进行评定。文中在对旧建筑物结构安全性评定聚类指标研究的基础上,建立了结构安全性评定等级聚类灰数的白化权函... 详细信息

近年来,我国旧建筑物已达到相当规模。为减少盲目地选择拆除或不加科学决策的维修改造造成的浪费,必须对旧建筑物结构安全性进行评定。文中在对旧建筑物结构安全性评定聚类指标研究的基础上,建立了结构安全性评定等级聚类灰数的白化权函数,进而应用灰色聚类方法对某旧建筑物结构安全性进行了评定。结果表明该方法简单实用,能为旧建筑物维修改造决策提供科学依据,是一种对旧建筑物结构安全性评定方法有益的探索,对建筑业乃至社会的和谐发展都具有重大意义。

关键词：结构安全性评定聚类指标白化权函数

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新型建筑节能结构体系技术经济分析

西安建筑科技大学学报（自然科学版） 2005年第2期37卷 239-242页

作者：闫文周惠彦涛西安建筑科技大学管理学院陕西西安710055

多层民用建筑通常采用砖混和框架结构,这两种结构存在着明显的局限性,密肋轻板结构是一种新型的建筑节能结构体系,应用信息熵理论和模糊数学方法对以上三种结构体系进行了技术经济比较和综合评价,阐明了应用密肋板轻型结构体系能带来显... 详细信息

多层民用建筑通常采用砖混和框架结构,这两种结构存在着明显的局限性,密肋轻板结构是一种新型的建筑节能结构体系,应用信息熵理论和模糊数学方法对以上三种结构体系进行了技术经济比较和综合评价,阐明了应用密肋板轻型结构体系能带来显著的技术经济效益和社会环境效益,为这一节能结构体系的推广和应用提供了可靠的理论依据.

关键词：轻板结构技术经济分析评价熵

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油田地面工程施工风险应急管理

土木工程与管理学报 2020年第3期37卷 8-12,25页

作者：闫文周陈芸茜西安建筑科技大学管理学院陕西西安710055

为了解决油田地面工程施工风险难以快速应对的问题,本文建立油田地面工程施工风险本体网络,结合案例推理技术,构建油田地面工程施工风险应急管理模型。利用OWL语言本体化历史案例,计算油田地面工程施工风险案例的综合相似度,在属性阈值... 详细信息

为了解决油田地面工程施工风险难以快速应对的问题,本文建立油田地面工程施工风险本体网络,结合案例推理技术,构建油田地面工程施工风险应急管理模型。利用OWL语言本体化历史案例,计算油田地面工程施工风险案例的综合相似度,在属性阈值和关键属性阈值条件下选择最相似的源案例进行匹配。若不满足关键属性阈值条件,则启用Jess推理机进行规则推理修正,针对油田地面工程施工风险事件提出最合适的应急措施。知识本体和案例推理技术引入油田地面工程施工风险应急控制领域,完善了现有的事故控制理论,提高了油田地面工程建设安全控制的智能化水平。

关键词：油田地面工程施工风险控制知识本体案例相似度规则推理

16.48% Efficient solution-processed CIGS solar cells with crystal growth and defects engineering enabled by Ag doping strategy

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Journal of Energy Chemistry 2025年第1期100卷 59-65页

作者： Mengyu Xu Shaocong yan Ting Liang Jia Jia Shengjie Yuan Dongxing Kou Zhengji zhou wenhui zhou Yafang Qi Yuena Meng Litao Han Sixin Wu Key Laboratory for Special Functional Materials of MOE National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Henan University

Solution-processed Cu（In,Ga）Se2（CIGS） solar cells suffer from serious carrier recombination and power conversion efficiency（PCE） loss because of the poor film properties and easy formation of ***, we propose Ag&Se co-selenization strategy to enhance the crystallization and passivate harmful defects of the CIGS films. The formation of Ag-Se phase during the selenization process enables the formation of large grains and suppresses the deep level defects. It is found that Ag doping can enlarge the depletion region width, lower the Urbach energy and prolong the carrier lifetime. As a result, a champion solution-processed CIGS solar cell presents a high efficiency of 16.48% with the highly improved opencircuit voltage（VOC） of 662 m V and fill factor（FF） of 75.8%. This work provides an efficient strategy to prepare high quality solution-processed CIGS films for high-performance CIGS solar cells.

关键词： CIGS solar cells Solution-processed method Ag doping Crystal growth Defects engineering

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飞秒激光在猪眼角膜板层切削中的实验研究

国际眼科杂志 2011年第9期11卷 1534-1535页

作者：周衍文冯宇宁沈阳爱尔眼视光医院中国辽宁省沈阳市110003

目的:探讨飞秒激光在离体猪眼角膜行板层切削的切削深度、平滑度及可行性。方法:新鲜离体猪眼及甘油保存复水猪眼各10只,利用飞秒激光进行板层切削。激光切削前后对角膜进行测厚,计算角膜瓣厚度。同时选择徒手制作同样直径角膜瓣,扫描... 详细信息

目的:探讨飞秒激光在离体猪眼角膜行板层切削的切削深度、平滑度及可行性。方法:新鲜离体猪眼及甘油保存复水猪眼各10只,利用飞秒激光进行板层切削。激光切削前后对角膜进行测厚,计算角膜瓣厚度。同时选择徒手制作同样直径角膜瓣,扫描电镜观察两种方法制瓣的角膜基质面的形态区别。结果:新鲜离体猪眼角膜瓣厚度为394.10±12.04μm,甘油保存复水后猪眼角膜瓣厚度为366.30±15.28μm。飞秒激光切削的角膜表面较徒手剥离的角膜表面光滑。结论:飞秒激光在离体猪眼表面切削深度与设定切削深度存在差异,其切削表面光滑,在角膜移植中具有广泛应用前景。

关键词：飞秒激光切削深度角膜厚度