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| 1 | The impacts of climate change on the Neolithic cultures of Gansu-Qinghai region during the late Holocene Megathermal显示文摘Holocene Megathermal 被划分成早、中间、迟了的时期,各由于他们改变趋势的不同气候在过时的文化上有不同影响。这研究基于在金海·莱克,记录的环境进化信息的比较分析黄土高原和 Zoige 和 Gansu-Qinghai 区域的过时的地点的空间分发的西方的边。结果证明早、中间的时期向温暖、潮湿在 Gansu-Qinghai 区域作为主要扇区与农业支持了过时的文化的开发,而且, Yangshao 文化繁荣的一个全盛时期出现了。Holocene 在 Gansu-Qinghai 区域在 5.9 ka BP 在冷气候事件以后进入了迟了的时期。后来,气候开始变得冷。然而,在 5.84.2 ka BP,相对稳定的温暖、潮湿的气候在这个区域为过时的年龄的 Majiayao 文化的发展创造了条件,因此,它的文化遗产地点的分发向高高度和高纬度膨胀了。从 4.2 ka BP 向前,气候变得冷、干燥,它在 Gansu-Qinghai 区域的过时的文化上有重要影响,在 4.2 ka BP 附近在文化人物和 Qijia 文化的空间分发导致一个戏剧的变化。在以后一将近 300 年冷、干燥的时期,统一过时的耕作文化完全崩溃了。以后,畜牧和耕作和地区性的多重文化的一个工业部门形成了,并且最终导致了原始社会并且开始一个使文明的社会的结束。 | LIU Fenggui ZHANG Yili FENG Zhaodong HOU Guangliang ZHOU Qiang ZHANG Haifeng | 2010 | Journal of Geographical Sciences2010，20，3： | 18 |
| 2 | Risk analysis of snow disaster in the pastoral areas of the Qinghai-Tibet Plateau显示文摘雪灾难是顶之一世界范围的十自然灾难,和最严重的自然灾难到影响 Qinghai 西藏高原的牧剧区域。基于从历史的记录收集的危险伤害数据和从这危险在 2010 影响的实体收集的数据,Qinghai西藏高原上的雪灾难的 18 个索引的全面分析被进行,包含危险伤害,物理暴露的数量忍受危险的实体脸,敏感到危险,和能力到对灾难作出回应。分析显示那:(1 ) 区域在 Qinghai 西藏高原上的雪灾难高风险在 Xinjiang 区域位于 Yecheng 和 Pishan 的县的某些区域;(2 ) 区域在雪中等风险灾难在 Qinghai 西藏高原,和南部的 Qinghai 高原的东南的部分的中央西方的部分在 Gangdise 山和喜马拉雅山脉之间被发现;(3 ) 雪灾难的风险在整个到 30 ‰ ? ? 的南方的大区域通常是低的 ????????????? ?? 吗?? | LIU Fenggui MAO Xufeng ZHANG Yili CHEN Qiong LIU Pei ZHAO Zhilong | 2014 | Journal of Geographical Sciences2014，24，3： | 13 |
| 3 | Formation Dynamics and Quantitative Prediction of Hydrocarbons of the Superpressure System in the Dongying Sag显示文摘摘要:基于油 / 气体水池的形成动力学的理论, Dongying 下垂能关于油和气体的累积被划分成三个动态系统:superpressure 封闭系统,关上半的系统和正常迫使开的系统。在 superpressure 封闭系统和烃逐出的规则基于 superpressure 的开始的分析,烃产生与 superpressure 有关,这被发现,它是烃移植的主要开车因素。superpressure 形成的微破裂是为烃移植的主要隧道。为烃逐出有三个动态模式:通过微裂缝的免费的水排水,烃累积和排水。在 superpressure 封闭系统, oil-driving-water 过程和油 / 气体累积通过象 superpressure 系统的阵发性的进化和差错的阵发性的压力版本的如此的二个动态模式在 lithologic 陷井被完成。lithologic 陷井的含有石油的能力是亲密地与形成水库的动态力量有关。为水池形成的动态条件的量的评估能有效地预言陷井的含有石油的能力。 | SUI Fenggui HAO Xuefeng LIU Qing ZHUO Qin'gong ZHANG Shouchun | 2008 | Acta Geologica Sinica(English Edition)2008，82，1： | 4 |
| 4 | Farmers′ Perception to Farmland Conversion: A Questionnaire Survey in Xining City, Qinghai Province, China显示文摘China is experiencing a fast process of farmland conversion which is conducted mainly by local governments to fuel economic development.Social tension is aroused and policy makers take great concerns on coordinating interests among different stakeholders,especially for increasing farmers′ interest.The purpose of this study is to get some insights related to land acquisition institution by exploring farmers′ perception to farmland conversion.Participatory Rural Appraisal(PRA) was applied for the investigation in peri-urban area,of Xining City,Qinghai Province,China.The total of 519 householders from 15 villages completed valid questionnaire survey from July to November,2012.The results indicate that farmland conversion has several impacts on farmers′ life.Most farmers are gradually adapting to city life.Higher living expenses and more income are perceived by farmers with average score of 4.21 and 2.69,respectively.The average scores of 2.38 and 2.46 are for improvement of life security and more job opportunities.Farmers expect to get some stable ways of compensation in addition to lump-sum compensation in cash.Stable subsidies every year and obtaining same number of land received strong proposal.And these two options are cited by 49.6% and 43.9% of respondents.Farmland conversion brings about cleaner living condition and more amenities,but lower air visibility and drier air.Results reflect landless farmers′ economic and life pressures and various demands.Local government should pay more attention to increase farmers′ income and improve rural security system. | CHEN Qiong CAI Yunlong LIU Fenggui ZHOU Qiang ZHANG Haifeng | 2013 | Chinese Geographical Science2013，23，5： | 4 |
| 5 | Substantial transition to clean household energy mix in rural China显示文摘The household energy mix has significant impacts on human health and climate,as it contributes greatly to many health-and climate-relevant air pollutants.Compared to the well-established urban energy statistical system,the rural household energy statistical system is incomplete and is often associated with high biases.Via a nationwide investigation,this study revealed high contributions to energy supply from coal and biomass fuels in the rural household energy sector,while electricity comprised∼20%.Stacking(the use of multiple sources of energy)is significant,and the average number of energy types was 2.8 per household.Compared to 2012,the consumption of biomass and coals in 2017 decreased by 45%and 12%,respectively,while the gas consumption amount increased by 204%.Increased gas and decreased coal consumptions were mainly in cooking,while decreased biomass was in both cooking(41%)and heating(59%).The time-sharing fraction of electricity and gases(E&G)for daily cooking grew,reaching 69%in 2017,but for space heating,traditional solid fuels were still dominant,with the national average shared fraction of E&G being only 20%.The non-uniform spatial distribution and the non-linear increase in the fraction of E&G indicated challenges to achieving universal access to modern cooking energy by 2030,particularly in less-developed rural and mountainous areas.In some non-typical heating zones,the increased share of E&G for heating was significant and largely driven by income growth,but in typical heating zones,the time-sharing fraction was<5%and was not significantly increased,except in areas with policy intervention.The intervention policy not only led to dramatic increases in the clean energy fraction for heating but also accelerated the clean cooking transition.Higher income,higher education,younger age,less energy/stove stacking and smaller family size positively impacted the clean energy transition. | Guofeng Shen Rui Xiong Yanlin Tian Zhihan Luo Bahabaike Jiangtulu Wenjun Meng Wei Du Jing Meng Yuanchen Chen Bing Xue Bin Wang Yonghong Duan Jia Duo Fenggui Fan Lei Huang Tianzhen Ju Fenggui Liu Shunxin Li Xianli Liu Yungui Li Mu Wang Ying Nan Bo Pan Yanfang Pan Lizhi Wang Eddy Zeng Chao Zhan Yilin Chen Huizhong Shen Hefa Cheng Shu Tao | 2022 | National Science Review2022，9，7： | 4 |
| 6 | Transition and fracture shift behavior in LCF test of dissimilar welded joint at elevated temperature显示文摘This work focused on the low-cycle fatigue(LCF) behavior of modified 9Cr/CrMoV dissimilar welded joint at elevated temperature. Narrow gap submerged arc welding(NG-SAW) process via multi-pass and multi-layer techniques was employed to fabricate the welded joint. LCF tests at different strain amplitude range from 0.22% to 0.75% were performed at strain ratio R =-1. The two-slope behavior based on fracture location shift was presented both on the cyclic stress-strain(CSS) curve and Manson-Coffin(M-C) curve, which could be applied to predict the fatigue life more precisely especially at relatively low strain amplitude. The results indicated that the joint failed in CrMoV-base metal(BM) at relatively low strain amplitude below 0.4% while failure shifted to CrMoV-over tempered zone(OTZ) at higher strain amplitude above 0.4%. Fatigue failure occurred in CrMoV-BM at low strain amplitude could be attributed to temperature softening effect in CrMoV-BM combined with cyclic strengthening in CrMoV-OTZ. While CrMoV-OTZ with a comparable number of grain boundaries and much lower hardness than that of CrMoV-BM was deemed to be the weakest zone across the welded joint at higher strain amplitude.EBSD investigations also revealed that CrMoV-BM experienced more fatigue damage at relatively low strain amplitude, while CrMoV-OTZ accumulated more plastic strain at higher strain amplitude. | Xiongfei Wang ChendongShao Xia Liu Fenggui Lu | 2018 | Journal of Materials Science & Technology2018，34，4： | 2 |
| 7 | Study of the intensity and driving factors of land use/cover change in the Yarlung Zangbo River, Nyang Qu River, and Lhasa River region, Qinghai-Tibet Plateau of China显示文摘Land use/land cover(LULC) is an important part of exploring the interaction between natural environment and human activities and achieving regional sustainable development. Based on the data of LULC types(cropland, forest land, grassland, built-up land, and unused land) from 1990 to 2015, we analysed the intensity and driving factors of land use/cover change(LUCC) in the Yarlung Zangbo River,Nyang Qu River, and Lhasa River(YNL) region, Qinghai-Tibet Plateau of China, using intensity analysis method, cross-linking table method, and spatial econometric model. The results showed that LUCC in the YNL region was nonstationary from 1990 to 2015, showing a change pattern with 'fast-slow-fast' and 'U-shaped'. Built-up land showed a steady increase pattern, while cropland showed a steady decrease pattern. The gain of built-up land mainly came from the loss of cropland. The transition pattern of LUCC in the YNL region was relatively single and stable during 1990–2015. The transition pattern from cropland and forest land to built-up land was a systematic change process of tendency and the transition pattern from grassland and unused land to cropland was a systematic change process of avoidance. The transition process of LUCC was the result of the combined effect of natural environment and social economic development in the YNL region. This study reveals the impact of ecological environment problems caused by human activities on the land resource system and provides scientific support for the study of ecological environment change and sustainable development of the Qinghai-Tibet Plateau. | LUO Jing XIN Liangjie LIU Fenggui CHEN Qiong ZHOU Qiang ZHANG Yili | 2022 | Journal of Arid Land2022，14，4： | 2 |
| 8 | Effects of Active Gases on Droplet Transfer and Weld Morphology in Pulsed-Current NG-GMAW of Mild Steel显示文摘The current research of narrow-gap gas metal arc welding(NG-GMAW)primarily focuses on improving the sidewall fusion and avoiding the lack-of-fusion defect.However,the high cost and operation difficulty of the methods limit the industrial application.In this study,small amount of active gases CO_(2) and O_(2) were added into pure argon inert shielding gas to improve the weld formation of pulsed-current narrow-gap gas metal arc welding(NG-GMAW)of mild steel.Their effects on droplet transfer and arc behavior were investigated.A high-speed visual sensing system was utilized to observe the metal transfer process and arc morphology.When the proportion of CO_(2),being added into the pure argon shielding gas,changes from 5%to 25%,the metal transfer mode changes from pulsed spray streaming transfer to pulsed projected spray transfer,while it remains the pulsed spray streaming transfer when 2%to 10%O_(2) is added.Both CO2 and O_(2) are favorable to stabilizing arc and welding process.O_(2) is even more effective than CO_(2).However,O_(2) is more likely to cause slags on the weld surface,while CO_(2) can improve the weld appearance in some sense.The weld surface concavity in NG-GMAW is greatly influenced by the addition of active gas,but the weld width and weld penetration almost keep constant.This study proposes a new method which is beneficial to improving the weld bead formation and welding process stability. | Guoqiang Liu Xinhua Tang Qi Xu Fenggui Lu Haichao Cui | 2021 | Chinese Journal of Mechanical Engineering2021，34，4： | 2 |
| 9 | Tight sandstone reservoir sensitivity and damage mechanism analysis: A case study from Ordos Basin, China and implications for reservoir damage prevention显示文摘Analysis of reservoir sensitivity to velocity,water,salt,acid,alkali and stress is critical for reservoir protection.To study the tight sandstone reservoir sensitivity at different formation depths(effective stress)and formation water conditions(pH,salinity,and fluid velocity),a series of dynamic core flow tests under different pH,salinity,acid,and effective stress conditions were performed on samples from tight sandstone reservoirs of the Upper Triassic Yanchang 8(T_(3)y^(8))Member and conventional reservoirs of the Middle-Lower Jurassic Yan'an 9(J_(1-2)y^(9))Member in the Ordos Basin.The results indicate that,compared with the conventional reservoirs,the tight sandstone reservoirs are more sensitive to velocity and stress,less sensitive to water,alkali and salinity,and respond better to acid fracturing.In addition,the critical conditions(salinity,velocity,pH,and stress)for pumping drilling,completion,and fracturing fluids into tight sandstone reservoirs were investigated.A combination of scanning electron microscopy coupled with energy-dispersive spectrometry(SEM-EDS),cathodoluminescence(CL),casting thin section(CTS)and nuclear magnetic resonance(NMR)images,high-pressure mercury injection capillary pressure(MICP)measurements as well as X-ray fluorescence spectral(XRF)analyses were employed to analyze the damage mechanisms of the conventional reservoirs(J_(1-2)y^(9))and tight sandstone reservoirs(T_(3)y^(8))caused by fluid invasion.The results suggest that reservoir sensitivity is primarily conditioned by the composition of detrital components and interstitial fillings,petrophysical properties,pore-throat structure,and diagenetic facies.All these factors control the sensitivity types and extent of the reser-voirs.Our results indicate that the poorer the reservoir physical properties,the stronger the reservoir heterogeneity and sensitivity,implying that tight sandstone reservoirs are more susceptible to changes in fluids than conventional reservoirs.This study offers insights into the reservoir damage types and helps to improve the design and implementation of protection measures for tight sandstone reservoir exploration. | Zhongquan Liu Bingbing Shi Tianchen Ge Fenggui Sui Yue Wang Pengfei Zhang Xiangchun Chang Ye Liu Yongrui Wang Zhaoyang Wang | 2022 | Energy Geoscience2022，3，4： | 1 |
| 10 | Study on welding pro- cess and prosperities of AA5754 Al-alloy welded by double pulsed gas metal arc welding显示文摘 | Liu Anhua Tang Xinhua Lu Fenggui | 2013 | Mater Des2013，50，： | 1 |
| 11 | Public response to earth- quake disaster: a ease study in Yushu Tibetan Autonomous Prefec- ture显示文摘 | Wei Benyong Su Guiwu Liu Fenggui | 2013 | Natural Hazards2013，69，： | 1 |
| 12 | Study on fatigue property and microstrncture characteristics of welded nuclear power rotor with heavy section 显示文摘 | Liu Peng Lu Fenggui Liu Xia | 2014 | Journal of Alloys and Compounds2014，584，25： | 1 |
| 13 | Study on welding process and prosperities of AA5754 Al-alloy welded by double pulsed gas metal arc welding显示文摘 | Anhua Liu Xinhua Tang Fenggui Lu | 2013 | Materials and Design2013，50，： | 1 |
| 14 | Dynamic Assessment of Spatiotemporal Population Distribution Based on Mobile Phone Data: A Case Study in Xining City,China显示文摘High-resolution,dynamic assessments of the spatiotemporal distributions of populations are critical for urban planning and disaster management.Mobile phone big data have real-time collection,wide coverage,and high resolution advantages and can thus be used to characterize human activities and population distributions at fne spatiotemporal scales.Based on six days of mobile phone user-location signal(MPLS)data,we assessed the dynamic spatiotemporal distribution of the population of Xining City,Qinghai Province,China.The results show that strong temporal regularity exists in the daily activities of local residents.The spatiotemporal distribution of the local population showed a signifcant downtown-suburban attenuation pattern.Factors such as land use types,holidays,and seasons signifcantly afect the spatiotemporal patterns of the local population.By combining other spatiotemporal trajectory data,high-resolution and dynamic real-time population distribution evaluations based on mobile phone location signals could be better developed and improved for use in urban management and disaster assessment research. | Benyong Wei Guiwu Su Fenggui Liu | 2023 | International Journal of Disaster Risk Science2023，14，4： | 0 |
| 15 | Economic Ripple Effects of Individual Disasters and Disaster Clusters显示文摘Disaster clusters refer to major disasters that cluster in space and time without any linkage, resulting in large direct damage and economic ripple effects(EREs).However, the cumulative EREs caused by a disaster cluster may not be equal to the summation EREs of the individual disasters within a cluster. We constructed a global economic ripple input-output model suitable for the analysis of disaster clusters and demonstrated the extent of this difference with the example of two typical catastrophes that occurred in 2011(the Great East Japan Earthquake and the Great Thailand Flood), within an interval of only 136 days. The results indicate that:(1) The EREs suffered by 11 of the 35countries affected(30%) are “1 + 1 > 2”, and “1 + 1 < 2”for 24 of the 35 countries affected(70%). This indicates that there is a signifi cant difference between the cumulative and the summation losses. The difference is related to factors such as trade distance, economic influence of disasteraffected sectors, and trade ties;(2) The EREs are more than two times the direct loss and have an industrial dependence, mostly aggregated in key sectors with strong industrial influence and fast trade times in the industrial chain;and(3) Additional EREs due to the extension of the recovery period will be aggregated in countries with close trade ties to the disaster-affected country, further magnifying the difference. | Zhengtao Zhang Ning Li Ming Wang Kai Liu Chengfang Huang Linmei Zhuang Fenggui Liu | 2022 | International Journal of Disaster Risk Science2022，13，6： | 0 |
| 16 | In Situ DIC Study on LCF Behavior of Retired Weld Joint Subjected to Prolonged Service at Elevated Temperature显示文摘By using digital image correlation(DIC), low-cycle fatigue(LCF) behavior of CrMoV weld joint taken from a retired gas turbine rotor after 15-year service was investigated at 500 ℃ and 540 ℃. The most remarkable plastic strain was observed in the weld metal(WM), which was up to 6 times of the global strain at mid-life cycle. Due to the cyclic accumulation of local deformation, the stress–strain hysteresis loops relative to tensile or compressive strain concentration area in WM displayed the ratchetting shape. The local deformation accumulation of WM was attributed to the effect of the equiaxed grain zone near the WM center. The accumulated plastic strain was considered as the main fatigue failure mechanism. | Anqi Zuo Xia Liu Chendong Shao Mingzhe Fan Ninshu Ma Fenggui Lu | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，8： | 0 |
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