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多灾情景下城市区域Natech风险应对分析

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中国安全生产科学技术 2024年第7期20卷 5-11页

作者：汪嘉俊兰猛沈锴欣耿婧翁文国清华大学安全科学学院北京100084 清华大学公共安全研究院北京100084 城市综合应急科学北京市重点实验室北京100084

为更好地应对自然灾害诱发的技术灾难(Natech事件)产生的复杂多灾情景风险,提出城市区域Natech风险应对需求满足性评估方法,基于对城市区域单元的划分,评估单元的风险应对需求等级和单元内的风险应对资源满足性,并完成对我国某市某区域... 详细信息

为更好地应对自然灾害诱发的技术灾难(Natech事件)产生的复杂多灾情景风险,提出城市区域Natech风险应对需求满足性评估方法,基于对城市区域单元的划分,评估单元的风险应对需求等级和单元内的风险应对资源满足性,并完成对我国某市某区域风险应对需求满足性的分析,提出对策建议。然后,基于国内外城市暴雨—洪涝案例,运用情景理论构建城市区域暴雨—洪涝的情景模型,定量分析风险应对要素在Natech事件多灾情景中的应急响应作用。研究结果表明:只有当各种类型的风险应对需求均满足时,才能更好地提升应急响应水平。研究结果可为多灾情景下的城市区域Natech风险应对提供科学参考和建议。

关键词： Natech 风险应对城市区域解释结构模型暴雨洪涝

Surface and interface analysis of HAP/TiO2 composite films on Ti6Al4V

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 193-198页

作者： SU Bing ZHANG weng-guang YU Xu-dong wang Cheng-tao School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China 1st Department Artillery Academy of PLA of China Hefei 230031 China School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China

The composite films constituted of hydroxyapatite (HAP) submicron particles embedded in the gel composed of the titania nanoparticles were prepared on commercial Ti6Al4V plates with titania buffer layer obtained by a spin-coating technique. The films were annealed in air at 450 ℃, 550 ℃ and 650 ℃, respectively. The phase formation, surface morphology, andinterfacial microstructure of the films were investigated by X-ray diffraction(XRD),Fourier transform infrared spectroscopy (FT-IR), field emission-scanning electron microscopy(FE-SEM) and energy dispersive X-ray (EDS) analysis. The results show that the as-prepared films are all well-crystallized, dense,homogeneous, and there was a close interfacial bond between the film and the substrate. The results of adhesion test indicate that there is a good bonding strength between the film and the substrate. The bone-like apatite formation on the surface of the films after immersion in acellular simulatedbody fluid(SBF) validated their bioactivities.

关键词： titanium dioxide hydroxyapatite composite film spin-coating technique

Structure,magnetization, and magnetostriction of Sm-R-Fe (R=Pr,Nd) thin films

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Rare Metals 2006年第5期25卷 538-542页

作者： wang Bowen CAO Shuying weng Ling HUANG Wenmei SUN Ying Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin300130 China International Center for Materials Physics Chinese Academy of Sciences Shenyang 110015 China

The structure, magnetization, and magnetostriction of Sm0.9Pr0.1Fex and Sm1-xNdxFel.9 thin films have been investigated using X-ray diffraction, vibrating sample magnetometer, and optical cantilever method. It is found that the structure of Sm0.9Pr0.1Fex thin films consists of an Sm-Pr-Fe amorphous phase when x≤2.69 and that of Sm1-xNdxFel.9 thin films consists of an Sm-Nd-Fe amorphous phase. The in-plane magnetization of Sm0.91Pr0.1Fex thin films increases with increase in the Fe content, and low values of the in-plane coercivity occur in the range of 1.62≤ x≤ 2.28. The magnetostriction value of Sm0.91Pr0.1Fex thin films increases with increasing the Fe content when x ≤ 1.94 and decreases when x 〉 1.94. The in-plane magnetostriction of Sm1-xNdxFe1.9 thin films under low magnetic fields has been improved by the substitution of Nd for Sm when x = 0.2.

关键词： rare earth-iron thin film structure magnetization magnetostriction

Structural characterization and immunostimulatory activity of a water-soluble polysaccharide from abalone(Haliotis discus hannai Ino)muscle

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Food Science and Human Wellness 2023年第2期12卷 495-502页

作者： Linfan Shi Gengxin Hao Jun Chen Junling wang Wuyin weng College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China Engineering Research Center of the Modern Technology for Eel Industry Ministry of EducationXiamen 361021China

A water-soluble polysaccharide from abalone muscle(AMPP)was *** contents of carbohydrate,protein,uronic acid,and sulfate in AMPP were 83.5%,0.5%,2.7%,and 2.6%,***-performance liquid chromatography analysis indicated that AMPP was homogeneous and had an average molecular weight of approximately 3.2 *** main monosaccharides of AMPP were glucose(Glc)and mannose with a molar ratio of 99.7:*** structural characteristics of AMPP were elucidated through methylation analysis,Fourier transform infrared spectroscopy,and nuclear magnetic resonance *** linkages of AMPP consisted of terminal,1,4-linked,1,6-linked,and 1,4,6-linked Glcp with a molar ratio of 3.1:7.2:1.0:*** one repeat unit of the proposed AMPP structure,the backbone chain was composed of eight 1→4 glycosidic bonds and one 1→6 glycosidic bond,with three branch chains linked by 1→6 glycosidic *** addition,AMPP was found to possess potent immunostimulatory activity via rising phagocytosis of RAW264.7 cells and promoting secretion of TNF-α.

关键词： Polysaccharide Abalone muscle Structural characterization Immunostimulatory activity Nuclear magnetic resonance spectra

Comparison and analysis of mitigation ambitions of Parties’ updated Nationally Determined Contributions

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Advances in Climate Change Research 2023年第1期14卷 4-12页

作者： Hai-Lin wang Yu-Yan weng Xun-Zhang PAN Institute of Energy Environment and EconomyTsinghua UniversityBeijing 100084China Think Tank Center Tsinghua UniversityBeijing 100084China School of Economics and Management China University of PetroleumBeijing 102249China

Understanding mitigation ambitions of the Nationally Determined Contributions(NDCs)should include both the equity of supporting the Paris Agreement goals and the costs of achieving the proposed mitigation *** study presents a new framework that combines equity and economic costs to compare and analyze mitigation ambitions of Parties'updated *** representative 2℃ and 1.5℃ pathways,this framework uses multiple equity-principled allocations to derive the alignment of the updated NDCs with the Paris Agreement goals,and further applies a computable general equilibrium model to assess the economic costs of implementing the updated *** results show that global 2030 emissions may meet the selected global 2℃ pathway if all Parties achieve their most ambitious mitigation efforts,but there is still an emissions gap of 10-15 GtCO_(2) to follow the selected 1.5℃ *** the perspective of equity,the updated NDCs of the USA,the EU(including the UK in this study),and Japan lack ambition with respect to‘equal cumulative per capita emissions’under 2℃ and do not align with any equity principles under 1.5℃.The updated NDCs of China,India,Brazil and South Africa reflect their claims to‘equity’and‘common but differentiated responsibilities’.From the perspective of economic costs,the GDP and welfare losses of China,Brazil and South Africa incurred by achieving the updated NDCs are not lower than those of the three developed ***'s GDP loss is estimated at 0.43%-0.55%in 2030,which is higher than that of the USA(0.30%-0.38%)and the EU(0.25%-0.28%).This study suggests that developed Parties take the lead in further ratcheting up the NDCs and strengthen financial and technological support to developing countries so that the world could close the gap to 1.5℃.

关键词： Updated NDCs 2030 emissions Equity Economic costs Paris Agreement

A sprayable superhydrophobic dental protectant with photoresponsive anti-bacterial,acid-resistant,and anti-fouling functions

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Nano Research 2022年第6期15卷 5245-5255页

作者： Siyu Zhao Xuetao Yang Yingying Xu Zhenzhen weng Lan Liao Xiaolei wang The Affiliated Stomatological Hospital Nanchang UniversityNanchang 330006China The National Engineering Research Center for Bioengineering Drugs and the Technologies Institute of Translational MedicineNanchang UniversityNanchang 330088China The Key Laboratory of Oral Biomedicine Nanchang 330006China College of Chemistry Nanchang UniversityNanchang 330088China

Effective dental care can reduce the incidence of oral diseases(dental caries,dentin sensitivity,tooth discoloration,etc.).However,delayed or inappropriate usage of care tools not only fails to eliminate external adverse stimuli,but sometimes even causes dental *** by the traditional culture of“lacquer teeth”,a sprayable superhydrophobic protectant(ZFP)composed of ZnO,fluorine modified nano-silica(FSNs),and polydimethylsiloxane(PDMS)is constructed similar to automobile wax,for routine dental *** its superhydrophobic properties,this protective membrane can effectively resist the adhesion of bacteria,proteins,and food residues to the teeth ***,ZFP exerts stable superhydrophobic selfcleaning properties under external mechanical stimulation,temperature alternation,and acidic *** addition,ZnO in ZFP can significantly restrain the growth of dental caries-related bacteria(Streptococcus mutans),with an enhanced antibacterial capacity when combined with yellow light *** in vivo and in vitro experiments demonstrate that ZFP is a safe,convenient,and quadruplex-effective dental protectant,which is expected to serve as a promising toothpaste companion for joint maintenance of dental health.

关键词： dental membrane superhydrophobicity ZnO antibacterial photocatalysis

Genetic variation of wood tracheid traits and their relationships with growth and wood density in clones of Pinus tabuliformis

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Journal of Forestry Research 2018年第4期29卷 1014-1023页

作者： Fangqun Ouyang Jianwei Ma Sanping An Junhui wang Yuhui weng State Key Laboratory of Tree Genetics and Breeding Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry Chinese Academy of Forestry Beijing 100083 People's Republic of China Research Institute of Forestry of Xiaolong Mountain Tianshui 741020 Gansu People's Republic of China Arthur Temple College of Forestry and Agriculture Stephen F. Austin State University Nacogdoches TX 75962 USA

To improve wood quality for pulpwood industries, it is important to examine not only wood density but also its components, especially tracheid characteristics. We studied genetic variations in the following tracheid traits by earlywood （EW） and latewood （LW）： tracheid length （TL）, double wall thickness （WT）, radial lumen diameter （R_D1）, tangential lumen diameter （T_D1）, radial central diameter （R_D2）, and tangential central diameter （T_D2）. We also studied the relationship with the following growth traits： diameter at breast height （DBH）, height （H）, crown breadth south-north axis （NSC）, crown breadth east-west axis （EWC）, ring width （RW）, latewood percentage （LWP）, and wood density （WD）. All sample materials were collected from a 33-year old clonal seed orchard of Pinus tabuliformis Carr. Genetic variation among clones was moderate for all tracheid traits, 9.49-26.03%. Clones significantly affected WT, R_D1, R_D2, T_D1, T_D2, and the two ratios WT/R_D1 and TL/T_D2 in EW but had no effects in LW. Clones significantly affected TL in LW but had no effects in EW. H2/C was higher in LW （0.50） than in EW （0.20） for TL, while H 2/C was higher in EW （0.27-0.46） for other tracheid traits and the two ratios （TL/T_D2 and WT/R_D1） than in EW （0.06-0.22）. WD and TL were significantly positively correlated, but WT and TL were negatively correlated both at individual and clone levels; all tracheid diameters and the four ratio values （EW_WT/ R_D1, LW WT/R_D1, EW_TL/T_D2 and LW_TL/ T_D2）, were strongly positively correlated with DBH, H, NSC, WEC and RW, and strongly negatively correlated with WD both at individual and clone levels. The most important variables for predicting WD were LW_TL, EW_WT and R_D1 in both EW and LW （r2= 0.22）. Selecting the top 10% of the clones by DBH would improve DBH growth by 12.19% （wood density was reduced by 0.14%） and produced similar responses between EW and LW for all tracheid traits： a reduction of 0.94 and 3.69% in tracheid length and increases

关键词： Pinus tabuliformis Clone Tracheid traits Wood density Genetic variation Correlation coefficient

经济高质量发展背景下中国省域物流业碳排放时空分异

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环境科学 2024年第9期45卷 5086-5096页

作者：张兰怡徐艺诺翁大维王硕胡喜生邱荣祖福建农林大学交通与土木工程学院福州350108

中国经济自2010年起由高速增长模式转变为高质量发展模式.经济高质量发展期间物流业蓬勃发展,同时产生大量的碳排放,对生态环境造成严重危害.为探明中国物流业碳排放的时空分异特征,基于Moran's I指数和双变量空间自相关模型对2010~202... 详细信息

中国经济自2010年起由高速增长模式转变为高质量发展模式.经济高质量发展期间物流业蓬勃发展,同时产生大量的碳排放,对生态环境造成严重危害.为探明中国物流业碳排放的时空分异特征,基于Moran's I指数和双变量空间自相关模型对2010~2021年的物流业碳排放进行相关性分析;同时,基于时空地理加权回归模型(GTWR)探明中国省域物流业碳排放影响因素的时空异质性.结果表明,统计期内中国省域物流碳排放的空间相关性逐渐从不显著的空间关系转变为显著的空间正相关性,且表现出不同程度的空间集聚性;其次,影响因素的异质性结果显示货物周转量、物流业人均生产总值和基础设施水平与物流业碳排放呈现空间正相关性,而能源强度与物流业碳排放呈现空间负相关性.对比地理加权回归模型(GWR)和最小二乘回归模型(OLS)结果可知,OLS模型、GWR模型和GTWR模型调整后的R2分别为0.541、0.567和0.838,表明所采用的GTWR模型的拟合效果最佳,能够更好地解释不同影响因素与物流业碳排放之间的时空异质性.研究结果可为经济高质量发展下的中国制定不同省域差异化的碳减排策略提供参考.

关键词：物流工程碳排放时空地理加权回归模型(GTWR) 省域物流业低碳物流

Magneto-thermo-mechanical characterization of giant magnetostrictive materials

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Rare Metals 2013年第5期32卷 486-489页

作者： Li wang Bo-Wen wang Zhi-Hua wang Ling weng Wen-Mei Huang Yan Zhou Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology International Center for Materials Physics The Chinese Academy of Sciences School of Science Tianjin University of Commerce

The variations of magnetization and magneto- striction with temperature and stress were investigated through the analysis of the effective field, induced by temperature and stress. A nonlinear magnetostrictive model of giant magnetostrictive materials was proposed. The proposed model can be used to calculate the magnetostrictive characterization of giant magnetostrictive materi- als in different temperatures and under different stresses. The coupling effects of axial stress, magnetic field, and temperature on the magnetostriction of a Terfenol-D rod were numerically simulated as well as experimentally tested. Comparison between the calculating and experimental results shows that the proposed model can better describe the magneto-thermo-mechanical characteristics of Terfenol-D rod under different temperatures and compressive stress. Therefore, the proposed model possesses an important significance for the design of magnetostrictive devices.

关键词： Nonlinear model Giant magnetostrictivematerials Temperature Stress