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Glacier variations and rising temperature in the *** since the Last Glacial Maximum

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Journal of Mountain Science 2018年第6期15卷 1268-1282页

作者： CHEN An-an WANG Ning-lian GUO Zhong-ming wu yu-wei wu Hong-bo shaanxi key laboratory of earth surface system and environmental carrying capacity Xi'an 710127China institute of earth surface system and hazards college of urban and environmental sciencesnorthwest universityXi'an 710127China school of history and tourism shaanxi university of technologyHanzhong 723000China

High-resolution imagery can be used to reconstruct former glacier boundaries through the identification of glacial erosional and sedimentary geomorphology. We employed moraine mapping and the accumulation–area ratio method(AAR), in conjunction with Landsat, Google Earth, and SRTM imagery, to reconstruct glacier boundaries and equilibrium-line altitudes(ELAs) for Mt. Kenya in the Last Glacial Maximum(LGM), the Little Ice Age(LIA), and at present. Our results show that the areas of Lewis Glacier and the Tyndall-I glacier system were 0.678 km^2 and 0.390 km^2, respectively, during the maximum of LIA. Those mean that the both glaciers have shrunken by 87.0% and 88.7%, respectively since the LIA. Area change ratios for each glacier were significantly larger in the period of 2000 through 2015 than the former periods, indicating that glacier recession has accelerated. Continuous ice loss in this region has been driven by rising temperature and fluctuating precipitation. Linear regression data for Lewis glacier show that mass balance sensitivity to dry season temperature was –315 mm w.e./℃, whereas the sensitivity to dry season precipitation was 5.2 mm w.e./mm. Our data also show that the ELA on the western slope of Mt. Kenya rose by 716-816 m from the LGM to the modern era, corresponding to that temperature rose by 5.2℃-6.5℃.

关键词： Remote sensing Last Glacial Maximum Little Ice Age Glacier area Equilibrium-linealtitudes Mt. Kenya

Cryospheric water regime by its functions and services in China

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Advances in Climate Change Research 2021年第3期12卷 430-443页

作者： ZHANG wei Xiaoming WANG SHEN Yong-Ping YANG Xue-Wen wu yu-wei CHEN An-An wu Xue-Jiao LIU Shi-wei YANG Yang ZHANG Jing-Lin LI Chen-yu Koktokay Snow Station State Key Laboratory of Cryospheric ScienceNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China College of Urban and Environmental Sciences Northwest UniversityXi’an710127China University of Chinese Academy of Sciences Beijing100049China

The terrestrial cryosphere functions to provide critical freshwater and serve societies and ecosystems,driving nature's contributions to people(NCP).This becomes increasingly important for the oasis areas in Northwest *** cryospheric meltwater is in demand to support the economy and reduce poverty,accompanied by growing requirements to protect the *** intend to investigate the contributions of cryospheric meltwater by analyzing the spatial functions and services pertinent to provisioning meltwater in *** on the currently available datasets during the 2000s of glaciers,snow cover,and permafrost,spatial clustering was utilized to analyze the contributions at the third-level basin *** assessment is carried out for the exposure of primary,secondary,and tertiary industrial sectors to cryospheric meltwater,which reflects the spatiality of potential services that cryospheric meltwater may *** results,we spatially cluster the contribution of cryospheric meltwater into six function zones and twenty-seven sub-zones,in association with the degree of their reliance on glaciers,snow cover,and *** the sector's exposure,we further spatially cluster the contribution areas into eleven service zones concerning the potential service of cryospheric ***,the cryosphere contributes approximately 8.3%of the total water resource in China,with function zones mainly distributed in northeastern China,Qinghai—Tibet Plateau(QTP),and other arid regions of Northwest China with various *** overall contribution ratios of the glacier,snow cover,and permafrost to cryospheric meltwater are about 35.6%,56.5%,and 7.9%,*** looking into the service zones,the cryospheric meltwater mainly contributes to the primary industry in Northwest China and QTP,even though it has less significant effects on all other industrial sectors,while the services to the ecosystem are mainly located in QTP and high mountain regi

关键词： Cryospheric meltwater Functions and services Glaciers Snow cover Permafrost

Impact of glacier shape on the mass balance changes:A case study of Dongkemadi region,central Tibetan Plateau

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Advances in Climate Change Research 2020年第1期11卷 22-30页

作者： CHEN An-An WANG Ning-Lian wu yu-wei ZHANG Quan GUO Zhong-Ming Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity Xi'an710127China Institute of Earth Surface System and Hazards College of Urban and Environmental SciencesNorthwest UniversityXi'an710075China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing100101China

The morphology of glacier is a key factor impacting the glacier mass ***-resolution digital elevation models(DEMs)provide a reliable method to explore the vertical characteristics of glacier surface elevation changes in different *** topographic maps from 1969 and Shuttle Radar Topography Mission(SRTM)data acquired in 2000,we calculated the surface elevation changes for 18 glaciers to generate vertical profiles of elevation difference(VPED)in the Dongkemadi region,central Tibetan *** results showed that the VPHDs vary highly among different glacier *** valley glaciers,surface thinning at middle elevations is less than that at higher and lower elevations;for cirque glaciers,however,the maximum surface decline occurred in the middle section;whereas hanging glaciers experienced progressively less surface lowering with increasing *** geometry directly affects ice dynamics,which in turn dictates the VPEDs of specific *** regulation of glacier evolution can be applied to project how valley glaciers might eventually assume the VPEDs of cirque and hanging glaciers due to ongoing warming.

关键词： Digital elevation models(DEM) Glacier shape lce flow Glacier change Dongkemadi region

Adjuvant percutaneous radiofrequency ablation of feeding artery of hepatocellular carcinoma before treatment

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World Journal of Gastroenterology 2009年第21期15卷 2638-2643页

作者： Yi-Bin Hou Min-Hua Chen Kun Yan Jin-yu wu wei Yang Ultrasound Department Peking University School of Oncology Cancer Hospital & Institute No. 52 Fucheng Road Haidian District Beijing 100142 China

AIM:To evaluate the feasibility and efficacy of percutaneous radiofrequency ablation(RFA) of the feeding artery of hepatocellular carcinoma(HCC) in reducing the blood-flow-induced heat-sink effect of ***:A total of 154 HCC patients with 177 pathologically confirmed hypervascular lesions participated in the study and were randomly assigned into two ***-one patients with 75 HCCs(average tumor size,4.3 ± 1.1 cm) were included in group A,in which the feeding artery of HCC was identified by color Doppler flow imaging,and were ablated with multiple small overlapping RFA foci [percutaneous ablation of feeding artery(PAA)] before routine RFA treatment of the ***-three patients with 102 HCC(average tumor size,4.1 ± 1.0 cm) were included in group B,in which the tumors were treated routinely with ***-enhanced computed tomography was used as post-RFA imaging,when patients were followed-up for 1,3 and 6 ***:In group A,feeding arteries were blocked in 66(88%) HCC lesions,and the size of arteries decreased in nine(12%).The average number of punctures per HCC was 2.76 ± 1.12 in group A,and 3.36 ± 1.60 in group B(P = 0.01).The tumor necrosis rate at 1 mo post-RFA was 90.67%(68/75 lesions) in group A and 90.20%(92/102 lesions) in group *** recur-rence rate at 6 mo post-RFA was 17.33%(13/75) in group A and 31.37%(32/102) in group B(P = 0.04).CONCLUSION:PAA blocked effectively the feeding artery of *** of PAA and RFA significantly decreased post-RFA recurrence and provided an alternative treatment for hypervascular HCC.

关键词： Hepatocellular carcinoma Feeding artery Radiofrequency ablation Recurrence Color Dopplerflow imaging

Continuous Cooling Transformation Behavior and Kinetic Models of Transformations for an Ultra-Low Carbon Bainitic Steel

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Journal of Iron and Steel Research International 2012年第12期19卷 73-78页

作者： ZHANG Zhi-min CAI Qing-wu yu wei LIXiao-lin WANG Li-dong Metallurgical Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China

The aim was to investigate transformation behavior and transformation kinetics of an ultra-low carbon bai- nitic steel during continuous cooling. Continuous cooling transformation （CCT） curves of tested steel were measured by thermal dilatometer and metallographic structures at room temperature were observed by optical microscope. Then transformation kinetic equation of austenite to ferrite as well as austenite to bainite was established by analyzing the relationship of lnln]-l/（1--f）] and lnt in the kinetic equation on the basis of processed experimental data. Finally, the measured and calculated kinetic behaviors of the steel during continuous cooling were compared and growth pat- terns of transformed ferrite and bainite were analyzed. Results showed that calculated result was in reasonable agree- ment with the experimental data. It could be concluded that the growth modes of transformed ferrite and bainite were mainly one dimension as the Avrami exponents were between 1 and 2.

关键词： ultra low carbon bainitic steel continuous cooling transformation kinetics Avrami equation

Dyeing bacterial cellulose pellicles for energetic heteroatom doped carbon nanofiber aerogels

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Nano Research 2014年第12期7卷 1861-1872页

作者： Zhen-yu wu Hai-wei Liang Chao Li Bi-Cheng Hu Xing-Xing Xu Qing Wang Jia-Fu Chen Shu-Hong yu Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale Collaborative InnovationCenter of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China HefeiAnhui 230026 China

The energy crisis and environmental pollution are serious challenges that humanity will face for the long-term. Despite tremendous efforts, the development of environmentally friendly methods to fabricate new energy materials is still challenging. Here we report, for the first time, a new strategy to fabricate various doped carbon nanofiber （CNF） aerogels by pyrolysis of bacterial cellulose （BC） pellicles which had adsorbed or were dyed with different toxic organic dyes. The proposed strategy makes it possible to remove the toxic dyes from waste-water and then synthesize doped CNF aerogels using the dyed BC pellicles as precursors. Compared with other reported processes for preparing heteroatom doped carbon （HDC） nanomaterials, the present synthetic method has some significant advantages, such as being green, general, low-cost and easily scalable. Moreover, the as-prepared doped CNF aerogels exhibit great potential as electrocatalysts for the oxygen reduction reaction （ORR） and as electrode materials for supercapacitors.

关键词： doped carbon nanofiberaerogels electrocatalysts oxygen reduction reaction supercapacitors organic dyes bacterial cellulose

Infragravity waves with internal wave characteristics in the south of the Bohai Sea of China

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Acta Oceanologica Sinica 2003年第2期22卷 171-178页

作者： Fan Zhisong, Gao Guoping, Yin Xunqiang, Fan yu, wu wei Marine Environment College,Ocean University of China,Qingdao 266003, China Ocean Univ China Marine Environm Coll Qingdao 266003 Peoples R China

The measurements by using ADCP (500 KH) and CTD were made during August 2000in the south (37?5'N, 120?5'E) of the Bohai Sea, where the water depth was about 16.5 m. The data of horizontal velocity with sampling interval of 2 min in 7 layers were obtained. The power spectrum analysis of these data indicates that there are very energetic infragravity waves with a period of about 6 min. The coherence spectrum analysis and the analysis of temporal variation of shear show that these infragravity waves are mainly the free wave model (properties of edge waves), in the meantime they possess some characteristics of internal waves, which are likely due to the distinctive marine environment in this area. It is speculated on that the instability processes (chiefly shear instability) of sheared stratified tidal flow owing to the effect of sea-floor slope in the coastal area might be the main mechanism generating these infragravity waves.

关键词： Infragravity waves edge waves internal waves vertical shear of horizontal velocity internal mixing

Body and Etiquette： Practicing Propriety by Wearing Jade and the Origin of Confucian Myth-ritual

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Journal of Literature and Art Studies 2017年第4期7卷 399-409页

作者： TANG Qi-cui wu yu-wei Shanghai Jiao Tong University Shanghai China The Chinese University ofHong Kong Hong Kong China

Etiquette （禮 Li, or ceremonial rules） is essentially a narrative symbol laden on human body （體 Ti）. The practice and belief in etiquette and body are observable points which cannot be ignored in genetics exploration of ＂etiquette＂. This article makees an archaeological excavation on ＂Li＂（禮）,＂Ti＂（體）, and the metaphorical meaning of such phrases as ＂ringing jade to show etiquette＂（鸣玉以相）, ＂practicing etiquette by wearing jade＂（佩玉践形） and so on.

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Jade Huang and Chinese Culture Identity： Focus on the Myth of＂Huang of Xiahoushi＂

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Journal of Literature and Art Studies 2016年第6期6卷 603-618页

作者： TANG Qi-cui wu yu-wei Shanghai Jiao Tong University Shanghai China

This paper focus on the myth of ＂Huang of Xiahoushi＂（~）：~ ~2_t~）, focusing on the distribution of Jade Huang （夏后氏之璜） since the early neolithic and its process of pluralistic integration. The paper explores the story of ethnic group, cultural identification and the significance of Jade Huang in the discourse construction of etiquette civilization behind the mythic narrative based on multi-evidence method and the local meaning of literature in ancient Chinese context.

关键词： Jade Huang Huang of Xiahoushi unified diversity Chinese identity etiquette civilization multi-evidence method