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Romilly Hills肉用细毛羊生长模型 被引量:2
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作者 刘守仁 王新华 +2 位作者 石国庆 皮文辉 李国庆 《新疆农业科学》 CAS CSCD 2001年第z1期48-50,共3页
用非线性回归曲线估计 (CurveEstimation)中 11种模型分别拟合RomillyHills肉用细毛羊的生长规律。其中以Cubic模型的拟合度最大。由Cubic模型参数进一步估算出公羊和母羊生长的拐点体重分别为43.498kg和 40 .88kg ,拐点日龄分别为 176 ... 用非线性回归曲线估计 (CurveEstimation)中 11种模型分别拟合RomillyHills肉用细毛羊的生长规律。其中以Cubic模型的拟合度最大。由Cubic模型参数进一步估算出公羊和母羊生长的拐点体重分别为43.498kg和 40 .88kg ,拐点日龄分别为 176 .5 6d和 183.86d ;平均日增重为 2 2 2 .6± 5 0 .72g/d和 188.3± 6 9.2 3g/d。平均瞬时相对生长率分别为 0 .34 779和 0 .34 34 2。 展开更多
关键词 Romilly hills 绵羊 生长模型
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Kettleman Hills填埋场三维稳定性极限上限分析 被引量:3
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作者 黄茂松 王浩然 宁兆轲 《岩土工程学报》 EI CAS CSCD 北大核心 2014年第11期1994-2001,共8页
1988年3月失稳破坏的美国Kettleman Hills填埋场是一个典型的复杂"山谷"型填埋场,众多学者研究表明仅采用二维截面分析难以对该填埋场整体稳定性进行评价。目前Kettleman Hills填埋场三维稳定性分析多采用极限平衡法,但是由... 1988年3月失稳破坏的美国Kettleman Hills填埋场是一个典型的复杂"山谷"型填埋场,众多学者研究表明仅采用二维截面分析难以对该填埋场整体稳定性进行评价。目前Kettleman Hills填埋场三维稳定性分析多采用极限平衡法,但是由于极限平衡法对破坏模式没有严格的要求(如速度相容),无法确定其所得到的解是偏于安全还是偏于危险,甚至不能确定该破坏模式是否合理。因此本文基于极限分析上限法,构造二维、拟三维及三维破坏机构进行分析,并通过与已有的文献及数值模拟结果进行对比验证方法的合理性及有效性。分析表明,二维和拟三维破坏机构类似,构建容易计算方便,适用于填埋场初步快速分析。而三维多个块体破坏机构构建复杂,计算量大,但能够反映实际填埋场的破坏情况,适用于填埋场的详细稳定性分析。 展开更多
关键词 Kettleman hills填埋场 三维 稳定性 极限上限分析 数值模拟
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美国Sand Hills地区地下水数值模拟及水量平衡分析 被引量:28
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作者 陈喜 陈洵洪 《水科学进展》 EI CAS CSCD 北大核心 2004年第1期94-99,共6页
利用地下水数值模型MODFLOW和非饱和带水平衡模型对处于半干旱半湿润沙丘地区(SandHills)地下水位进行了模拟,并分析了含水层补排水量,河流与地下水补排关系,以及区域水平衡过程。揭示了独特沙丘地形和土壤特性对地下水补排量的影响。... 利用地下水数值模型MODFLOW和非饱和带水平衡模型对处于半干旱半湿润沙丘地区(SandHills)地下水位进行了模拟,并分析了含水层补排水量,河流与地下水补排关系,以及区域水平衡过程。揭示了独特沙丘地形和土壤特性对地下水补排量的影响。模拟结果表明,入渗率大、非饱和带厚的沙丘有利于降水入渗补给,减少了地下水蒸散发损失。加上下覆含水层具有良好的地下水储水空间,是该地区储存丰富的地下水量,以维持河流稳定流量,供给众多湖泊和湿地的原因。该研究对我国地下水资源评价和生态环境脆弱地区水资源保护具有指导意义。 展开更多
关键词 地下水 数值模型 水量平衡 沙丘区 美国 Sandhills地区
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An Interpretation on Jig's Psychological Fluctuations in Hills like White Elephants
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作者 周东妮 杨雪霁 《海外英语》 2014年第11X期215-216,共2页
Hills like White Elephants is one of the masterpieces of Ernest Hemingway. The story bears an open ending. This paper attempts to analyze the heroine-Jig's psychological fluctuations, and her three emotional stage... Hills like White Elephants is one of the masterpieces of Ernest Hemingway. The story bears an open ending. This paper attempts to analyze the heroine-Jig's psychological fluctuations, and her three emotional stages to support the author's interpretation on the end of the story—the heroine's final decision is to have the baby born. 展开更多
关键词 INTERPRETATION PSYCHOLOGICAL FLUCTUATIONS hills LI
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Narrative Rhetoric of Hills Like White Elephants
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作者 王晓华 《海外英语》 2017年第15期140-141,174,共3页
Hills Like White Elephants is written by Ernest Hemingway,who is one of the greatest representatives of the American literature.Ingenious symbolism and efficient and powerful dialogue combine to make the story a repre... Hills Like White Elephants is written by Ernest Hemingway,who is one of the greatest representatives of the American literature.Ingenious symbolism and efficient and powerful dialogue combine to make the story a representative of Hemingway's short stories.What is especially successful and notable about this book is that it fully represents the author’s style of the"iceberg",where space of multi-profound meanings is hidden in the simple plot.It is so impressive because Ernest Hemingway has succeeded in presenting the deep meaning as close as possible to the readers through the simple and concise words.This paper tries to carry out a research on the narrative rhetoric of Hills Like White Elephants from three aspects.The first part begins with the analysis of its narrator and narrative situation.The second part centers on the focalization.In the last part,the emphasis is put on the narrative modes. 展开更多
关键词 hills Like White Elephants NARRATOR narrative situation focalization narrative modes
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Hills2586-2复合纺设备
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作者 王彬 刘建良 《济南纺织化纤科技》 2001年第4期43-44,46,共3页
本文重点就Hills公司2586-2型复合纺设备的技术特点作了详细阐述,并对Hills公司的概况、开发的典型复合纺丝品种及其在服装及产业上的应用做了简单介绍。
关键词 hills公司 复合纺丝设备 技术特点 化纤设备
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Female Hemingway Hero in"Hills Like White Elephant"
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作者 常海鸽 《海外英语》 2020年第7期198-199,共2页
Ernest Hemingway, an American author who won the Nobel Prize in Literature in 1954, is well known for his distinctive writing style, characterized by economy and understatement, and exact portrayal of macho characters... Ernest Hemingway, an American author who won the Nobel Prize in Literature in 1954, is well known for his distinctive writing style, characterized by economy and understatement, and exact portrayal of macho characters, which attracts many critics' attention and earns the title of Hemingway hero.This paper finds that the characteristics of the conventional Hemingway hero can be traced on the female character instead of the male character in"Hills Like White Elephants". Through analyzing the characteris- tics of Hemingway hero on the female character, the author concludes that the female character in"Hills Like White Elephants"of- fers a unique and unconventional example of Hemingway hero and deserves more attention in the research of Hemingway 's charac- terization. 展开更多
关键词 FEMALE CHARACTER HEMINGWAY HERO hills LIKE White ELEPHANTS
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On Jig's Psychological Changes in the Short Story Hills Like White Elephants of Hemingway 被引量:2
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作者 刘曦阳 刘柳 《海外英语》 2011年第9X期301-302,共2页
Hills Like White Elephants is a short story by Ernest Hemingway.It is a story about an American man and a pregnant girl.As the protagonist,Jig is considered as a submissive woman who has no definite views of her own.T... Hills Like White Elephants is a short story by Ernest Hemingway.It is a story about an American man and a pregnant girl.As the protagonist,Jig is considered as a submissive woman who has no definite views of her own.This paper attempts to analyze the changes of Jig's inner thought during the forty minutes of waiting the train.In addition to how the girl has grown up from a weak and dependent character into a brave and independent female after the painful struggle in the helpless and hopeless states under the great pressure of the man. 展开更多
关键词 HEMINGWAY hills Like WHITE ELEPHANTS JIG PSYCHOLOGICAL changes brave and independent FEMALE
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翻译目的论视角下的Hills Like White Elephants汉译本解读——以张祥麟、翟象俊译本为例 被引量:1
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作者 邓霞 谢世坚 《钦州学院学报》 2013年第6期52-55,共4页
基于翻译目的论,从译者的翻译目的、翻译方法、译者与其他翻译参与者(发起人、预期受众以及原作者)的关系等影响因素,对比分析Hills Like White Elephants汉译本,可看出翟象俊译本倾向于直译,张祥麟译本倾向于意译。两译者都充分考虑到... 基于翻译目的论,从译者的翻译目的、翻译方法、译者与其他翻译参与者(发起人、预期受众以及原作者)的关系等影响因素,对比分析Hills Like White Elephants汉译本,可看出翟象俊译本倾向于直译,张祥麟译本倾向于意译。两译者都充分考虑到预期受众这一重要因素,遵循了忠实原则和连贯原则,采取了相应的翻译手段,竭力实现了各自的翻译目的。 展开更多
关键词 hills Like WHITE ELEPHANTS 目的论 翟译 张译
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Geochemical characteristics of mafic and ultramafic rocks from the Naga Hills Ophiolite, India:Implications for petrogenesis 被引量:7
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作者 Ajoy Dey M.Faruque Hussain Mrigendra N.Barman 《Geoscience Frontiers》 SCIE CAS CSCD 2018年第2期517-529,共13页
The Naga Hills Ophiolite(NHO) represents one of the fragments of Tethyan oceanic crust in the Himalayan Orogenic system which is exposed in the Phek and Kiphire districts of Nagaland, India. The NHO is composed of par... The Naga Hills Ophiolite(NHO) represents one of the fragments of Tethyan oceanic crust in the Himalayan Orogenic system which is exposed in the Phek and Kiphire districts of Nagaland, India. The NHO is composed of partially serpentinized dunite, peridotite, gabbro, basalt, minor plagiogranite,diorite dyke and marine sediments. The basalts are mainly composed of fine grained plagioclase feldspar, clinopyroxene and orthopyroxene and show quenching and variolitic textures. The gabbros are characterized by medium to coarse grained plagioclase, orthopyroxene and clinopyroxene with ophitic to sub-ophitic textures. The ultramafic cumulates are represented by olivine, Cpx and Opx.Geochemically, the basalts and gabbros are sub-alkaline to alkaline and show tholeiitic features.The basalts are characterized by 44.1-45.6 wt.% of SiO_2 with 28-38 of Mg#, and the gabbros by38.7-43.7 wt.% of SiO_2, and 26-79 of Mg#. The ultramafic rocks are characterized by 37.4-52.2 wt.% of SiO_2, and 80-88 of Mg#. In multi-element diagrams(spidergrams) both basalts and gabbros show fractionated trends with strong negative anomalies of Zr. Nb. Sr and a gentle negative anomaly of P.However, the rare earth element(REE) plots of the basalts and gabbros show two distinct patterns. The first pattern, represented by light REE(LREE) depletion, suggests N-MORB features and can be interpreted as a signature of Paleo-Tethyan oceanic crust. The second pattern, represented by LREE enrichment with negligible negative Eu anomaly, conforms to E-MORB, and may be related to an arc tectonic setting. In V vs. Ti/1000, Cr vs. Y and AFM diagrams, the basalts and gabbros plot within Island Arc Tholeiite(IAT) and MORB fields suggesting both ridge and arc related settings. The ultramafic rocks exhibit two distinct patterns both in spidergrams and in REE plots. In the spidergram, one group displays highly enriched pattern, whereas the other group shows near flat pattern compared to primordial mantle. In the REE plot, one group displays steeper slopes [(La/Yb)N = 4.340-4.341], whereas the other displays moderate to flat slopes [(La/Yb)N = 0.97-1.67] and negative Eu-anomalies. Our study suggests that the ultramafic rocks represent two possible mantle sources(fertile and refractory). 展开更多
关键词 Geochemistry MAFIC and ULTRAMAFIC rocks Naga hills OPHIOLITE Northeast INDIA Ridge to arc MAGMATISM
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Antiplane response of two scalene triangular hills and a semi-cylindrical canyon by incident SH-waves 被引量:4
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作者 Yang Zailin Xu Huanan +1 位作者 Hei Baoping Zhang Jianwei 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2014年第4期569-581,共13页
Antiplane response of two scalene triangular hills and a semi-cylindrical canyon by SH-waves is studied using wave function expansion and complex function method. Firstly, the analytical model is divided into three pa... Antiplane response of two scalene triangular hills and a semi-cylindrical canyon by SH-waves is studied using wave function expansion and complex function method. Firstly, the analytical model is divided into three parts, and the displacement solutions of wave fields are constructed based on boundary conditions in the three regions. Three domains are then conjoined to satisfy the "conjunction" condition at shared boundary. In addition, combined with the zero-stress condition of semi-cylindrical canyon, a series of infinite algebraic equations for the problem are derived. Finally, numerical examples are provided and the influence of different parameters on ground motion is discussed. 展开更多
关键词 scattering of SH-waves scalene triangle hills semi-cylindrical canyon ground motion
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Minimum Bedrock Exposure Ages and Their Implications:Larsemann Hills and Neighboring Bolingen Islands,East Antarctica 被引量:3
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作者 HUANG Feixin LI Guangwei +5 位作者 LIU Xiaohan KONG Ping JU Yitai David FINK FANG Aimin YU Liangjun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2010年第3期543-548,共6页
Considerable controversy exists over whether or not extensive glaciation occurred during the global Last Glacial Maximum(LGM) in the Larsemann Hills.In this study we use the in situ produced cosmogenic nuclide ^(10... Considerable controversy exists over whether or not extensive glaciation occurred during the global Last Glacial Maximum(LGM) in the Larsemann Hills.In this study we use the in situ produced cosmogenic nuclide ^(10)Be(half life 1.51 Ma) to provide minimum exposure ages for six bedrock samples and one erratic boulder in order to determine the last period of deglaciation in the Larsemann Hills and on the neighboring Bolingen Islands.Three bedrock samples taken from Friendship Mountain(the highest peak on the Mirror Peninsula,Larsemann Hills;~2 km from the ice sheet) have minimum exposure ages ranging from 40.0 to 44.7 ka.The erratic boulder from Peak 106(just at the edge of the ice sheet) has a younger minimum exposure age of only 8.8 ka.The minimum exposure ages for two bedrock samples from Blundell Peak(the highest peak on Stornes Peninsula,Larsemann Hills;~2 km from the ice sheet) are about 17 and 18 ka.On the Bolingen Islands(southwest to the Larsemann Hills;~10 km from the ice sheet),the minimum exposure age for one bedrock sample is similar to that at Friendship Mountain(i.e.,44 ka).Our results indicate that the bedrock exposure in the Larsemann Hills and on the neighboring Bolingen Islands commenced obviously before the global LGM(i.e.,20-22 ka),and the bedrock erosion rates at the Antarctic coast areas may be obviously higher than in the interior land. 展开更多
关键词 east Antarctica Larsemann hills Bolingen Islands 1~Be exposure age erosion rate
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Reservoir Characteristics and Genetic Mechanisms of the Mesozoic Granite Buried Hills in the Deep-water of the Qiongdongnan Basin,Northern South China Sea 被引量:7
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作者 YOU Li XU Shouli +3 位作者 MAO Xuelian ZHONG Jia JIAO Yaoqi XIONG Xiaofeng 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2021年第1期259-267,共9页
Due to its structure,rock and mineral composition,fluid and other factors,the granite Buried Hill Reservoir is highly heterogeneous with a complex longitudinal structure and a reservoir space made up of a combination ... Due to its structure,rock and mineral composition,fluid and other factors,the granite Buried Hill Reservoir is highly heterogeneous with a complex longitudinal structure and a reservoir space made up of a combination of dissolution pores and fractures.This paper is based on current understanding of tectonic evolution in the northern part of the South China Sea,in conjunction with the seismic phase characteristics.It is determined that the meshed fault system was formed by three stages of movement-tectonic compression orogeny during the Indochinese epoch,strike-slip compression-tension during the Yanshanian Period,early fracture extension activation during the Himalayan-which controlled the distribution of the Buried Hill Reservoir.Drilling revealed two types of buried hills,faulted anticline and fault horst,their longitudinal structure and the reservoir space type being significantly different.The mineral composition,reservoir space and diagenetic characteristics of the reservoir rocks and minerals were analyzed by lithogeochemistry,micro section and logging etc.,it thus being determined that the Mesozoic rocks of the Songnan Low Uplift in the Qiongdongnan Basin are mainly composed of syenogranite,granodiorite,monzogranite,which is the material basis for the development of the Buried Hill Reservoir.The content of felsic and other brittle minerals is more than 70%,making it easy for it to be transformed into fractures.At the same time,the weathering resistance of granodiorite and monzogranite is weaker than that of syenogranite,which is easily weathered and destroyed,forming a thick sand gravel weathering zone.With increasing depth of burial,weathering and dissolution gradually weaken,the deep acidic fluid improving the reservoir property of internal fractures and expanding the vertical distribution range of the reservoirs.The research results lay a foundation for the exploration of Buried Hill in the deep-water area of the Qiongdongnan Basin. 展开更多
关键词 granite buried hill weathering structure DEEP-WATER genetic mechanism Qiongdongnan Basin
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Cenozoic Exhumation of Larsemann Hills,East Antarctica:Evidence from Apatite Fission-track Thermochronology 被引量:1
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作者 CHEN Xuanhua JIANG Rongbao +3 位作者 WAN Jinglin XU Gang JIANG Mei CHEN Danhong 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2010年第2期306-320,共15页
Does Cenozoic exhumation occur in the Larsemann Hills, East Antarctica? In the present paper, we conducted an apatite fission-track thermochronologic study across the Larsemann Hills of East Antarctica. Our work reve... Does Cenozoic exhumation occur in the Larsemann Hills, East Antarctica? In the present paper, we conducted an apatite fission-track thermochronologic study across the Larsemann Hills of East Antarctica. Our work reveals a Cenozoic exhumation event at 49.8 ± 12 Ma, which we interpret to be a result of exhumation caused by crustal extension. Within the uncertainty of our age determination, the timing of extension in East Antarctica determined by our study is coeval with the onset time of rifting in West Antarctica at c.55 Ma. The apatite fission-track cooling ages vary systematically in space, indicating a coherent block rotation of the Larsemann Hills region from c.50 Ma to c.10 Ma. This pattern of block tilting was locally disrupted by normal faulting along the Larsemann Hills detachment fault at c.5.4 Ma. The regional extension in the Larsemann Hills, East Antarctica was the result of tectonic evolution in this area, and may be related to the global extension. Through the discussion of Pan-Gondwanaland movement, and Mesozoic and Cenozoic extensions in West and East Antarctica and adjacent areas, we suggest that the protracted Cenozoic cooling over the Larsemann Hills area was caused by extensional tectonics related to separation and formation of the India Ocean at the time of Gondwanaland breakup. 展开更多
关键词 apatite fission-track thermochronology EXHUMATION normal faulting CENOZOIC Larsemann hills East Antarctica
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Role of lithology, weathering and precipitation on water chemistry of lakes from Larsemann Hills and Schirmacher Oasis of East Antarctica 被引量:1
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作者 Rajesh ASTHANA Prakash K SHRIVASTAVA +3 位作者 Hari B SRIVASTAVA Ashit K SWAIN Mirza Javed BEG Amit DHARWADKAR 《Advances in Polar Science》 CSCD 2019年第1期35-51,共17页
Schirmacher Oasis and Larsemann Hills areas represent two different periglacial environments of East Antarctica. Schirmacher Oasis is characterized by a vast stretch of ice-shelf in the north and East Antarctic Ice Sh... Schirmacher Oasis and Larsemann Hills areas represent two different periglacial environments of East Antarctica. Schirmacher Oasis is characterized by a vast stretch of ice-shelf in the north and East Antarctic Ice Sheet(EAIS) to its south. Whereas, in Larsemann Hills area the northern and north-western boundary is coastal area and EAIS in the southern part,exhibiting polar lowland between the marine and continental glacial ecosystems. Physico-chemical parameters of water samples from different lakes of both of these two distinct locations are quite contrasting and have indicated influence of lithology, weathering, evaporation and precipitation. The lake water chemistry in Larsemann Hills area is mainly governed by the lithology of the area while Schirmacher lakes exhibit influence of precipitation and rock composition. All major ions of lake waters indicate balanced ionic concentrations. The atmospheric precipitation has significantly modified the ionic distributions in the lakes and channels. Carbonation is the main proton supplying geochemical reactions involved in the rock weathering and this is an important mechanism which controls the hydrochemistry. The lake water hydrochemistry differs widely not only between two distant periglacial zones but also within a short distance of a single periglacial entity, indicating influence of territorial climate over hydrochemistry. 展开更多
关键词 lake water IONIC concentration Schirmacher OASIS Larsemann hills East ANTARCTICA
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Landslide Distribution and Processes in the Hills of Central Nepal: Geomorphic and Statistical Approach to Susceptibility Assessment 被引量:2
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作者 Motilal Ghimire Niroj Timalsina 《Journal of Geoscience and Environment Protection》 2020年第12期276-302,共27页
The study examined the landslide distribution, processes, and susceptibility of the Lalbakaiya watershed using GIS and remote sensing technology. Inventory of landslides was done using high-resolution satellite imager... The study examined the landslide distribution, processes, and susceptibility of the Lalbakaiya watershed using GIS and remote sensing technology. Inventory of landslides was done using high-resolution satellite imagery available on Google Earth and was verified and further investigated during the field visit. Geomorphic as well as statistical approaches were applied to assess landslides susceptibility and the significance of their outputs was discussed. Map layers representing conditioning and triggering factors of landslide occurrence were produced from various spatial data sources. The study found that the landslide of the Lalbakaiya watershed is primarily controlled by geology representing young, weak, fragile, and weathered sedimentary rocks. Besides, the role of topography such as steep slope, high relative relief, and land use and land cover played an important role in determining the landslide susceptibility. These processes are triggered by monsoon precipitation, seismicity, and land use change in addition to other factors. The geomorphic approach produces a reliable landslide susceptible map as evidenced by past and present (active) failures on a landscape unit, but this map has low predictability of the landslides occurrence. In contrast, the landslide susceptibility map derived from the landslide index method fairly conforms with that derived from the geomorphic approach. Susceptibility calculated by landslide index map is represented by a pixel value that indicates a probability of landslides occurrence, and is amenable to group into various susceptible classes. The model can predict areas of landslides based on quantitative relation between landslides and geo-ecological factors. The limitation of this approach is that these susceptible areas do not represent clearly defined landscape units, and can also overlook highly erodible areas where landslides are not apparent despite severe erosion and numerous minor failures. The study confirms that both geomorphic and statistical approaches can be complementarily integrated to produce predictable, reliable, and applicable landslide susceptibility maps that can make a plausible planning tool for conservation, development, and disaster risk reduction in the populated slopes of the Himalayas and like. 展开更多
关键词 LANDSLIDE Chure hills SUSCEPTIBILITY WATERSHED
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Seismic analysis of semi-sine shaped alluvial hills above subsurface circular cavity 被引量:5
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作者 Mehdi Panji Mohammad Habibivand 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2020年第4期903-917,共15页
In this study, a seismic analysis of semi-sine shaped alluvial hills above a circular underground cavity subjected to propagating oblique SH-waves using the half-plane time domain boundary element method(BEM) was carr... In this study, a seismic analysis of semi-sine shaped alluvial hills above a circular underground cavity subjected to propagating oblique SH-waves using the half-plane time domain boundary element method(BEM) was carried out. By dividing the problem into a pitted half-plane and an upper closed domain as an alluvial hill and applying continuity/boundary conditions at the interface, coupled equations were constructed and ultimately, the problem was solved step-by-step in the time domain to obtain the boundary values. After solving some verification examples, a semi-sine shaped alluvial hill located on an underground circular cavity was successfully analyzed to determine the amplification ratio of the hill surface. For sensitivity analysis, the effects of the impedance factor and shape ratio of the hill were also considered. The ground surface responses are illustrated as three-dimensional graphs in the time and frequency domains. The results show that the material properties of the hill and their heterogeneity with the underlying half-space had a significant effect on the surface response. 展开更多
关键词 alluvial semi-sine shaped hill half-plane BEM time domain circular cavity SH waves
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垂直花园城市Hills方式——东京六本木Hills的方式与效能研究 被引量:1
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作者 郭红旗 周丽 《建筑技艺》 2012年第6期196-199,共4页
通过分析森大厦集团开发的东京六本木Hills项目运营以来的情况,总结了垂直花园城市构想的实施策略——Hills方式在六本木Hills中的运用方式和实际效能,提出了Hills方式的补充与完善策略,指出了垂直花园城市构想的Hills方式对当代中国城... 通过分析森大厦集团开发的东京六本木Hills项目运营以来的情况,总结了垂直花园城市构想的实施策略——Hills方式在六本木Hills中的运用方式和实际效能,提出了Hills方式的补充与完善策略,指出了垂直花园城市构想的Hills方式对当代中国城市建设的借鉴意义。 展开更多
关键词 垂直花园城市 六本木hills hills方式 媒介
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Seismic Data Acquisition Techniques on Loess Hills in the Ordos Basin 被引量:4
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作者 YaoZonghui ChenJianxin +2 位作者 RenWenjun OianHanlin LiMaicheng 《Applied Geophysics》 SCIE CSCD 2004年第2期115-121,共7页
High-resolution exploration for lithologic targets confronted with difficulties due to the original brought out from geophysical and geologic characteristics of the loess hills and the very thick deserts in Ordos. Sci... High-resolution exploration for lithologic targets confronted with difficulties due to the original brought out from geophysical and geologic characteristics of the loess hills and the very thick deserts in Ordos. Scientific research since mid 1990s has conducted three acquisition techniques including the high-resolution crooked line survey in valleys, high-resolution multiple straight line survey and 3D survey, under different surface conditions and for different geological targets. 展开更多
关键词 oess hills HIGH-RESOLUTION crooked line in valleys multiple straight lines reticular 3D acquisition technique
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Tectono-magmatic evolution of Tethyan oceanic lithosphere in supra subduction zone fore arc regime:Geochemical fingerprints from crust-mantle sections of Naga Hills Ophiolite 被引量:1
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作者 Anisha Verencar Abhishek Saha +1 位作者 Sohini Ganguly Manikyamba C. 《Geoscience Frontiers》 SCIE CAS CSCD 2021年第3期19-41,共23页
The Naga Hills Ophiolite(NHO)belt in the Indo-Myanmar range(IMR)represents a segment of Tethyan oceanic crust and upper mantle that was involved in an eastward convergence and collision of the Indian Plate with the Bu... The Naga Hills Ophiolite(NHO)belt in the Indo-Myanmar range(IMR)represents a segment of Tethyan oceanic crust and upper mantle that was involved in an eastward convergence and collision of the Indian Plate with the Burmese Plate during the Late Cretaceous-Eocene.Here,we present a detailed petrological and geochemical account for the mantle and crustal sections of NHO,northeastern India to address(i)the mantle processes and tectonic regimes involved in their genesis and(ii)their coherence in terms of the thermo-tectonic evolution of Tethyan oceanic crust and upper mantle.The NHO suite comprises well preserved crustal and mantle sections discretely exposed at Moki,Ziphu,Molen,Washelo and Lacham areas.The ultramafic-mafic lithologies of NHO are mineralogically composed of variable proportions of olivine,orthopyroxene,clinopyroxene and plagioclase.The primary igneous textures for the mantle peridotites have been overprinted by extensive serpentinisation whereas the crustal section rocks reflect crystal cumulation in a magma chamber.Chondrite normalised REE profiles for the cumulate peridotite-olivine gabbro-gabbro assemblage constituting the crustal section of NHO show flat to depleted LREE patterns consistent with their generation from depleted MORB-type precursor melt in an extensional tectonic setting,while the mantle peridotites depict U-shaped REE patterns marked by relative enrichment of LREE and HREE over MREE.These features collectively imply a dual role of depleted MORB-type and enriched arc-type mantle components for their genesis with imprints of melt-rock and fluid-rock interactions.Tectonically,studied lithologies from NHO correspond to a boninitic to slab-proximal Island Arc Tholeiite affinity thereby conforming to an intraoceanic supra subduction zone(SSZ)fore-arc regime coherent with the subduction initiation process.The geochemical attributes for the crustal and mantle sections of NHO as mirrored by Zr/Hf,Zr/Sm,Nb/Ta,Zr/Nb,Nb/U,Ba/Nb,Ba/Th,Ba/La and Nd/Hf ratios propound a two-stage petrogenetic process:(i)a depleted fore arc basalt(FAB)type tholeiitic melt parental to the crustal lithologies was extracted from the upwelling asthenospheric mantle at SSZ fore-arc extensional regime thereby rendering a refractory residual upper mantle;(ii)the crust and upper mantle of the SSZ fore arc were progressively refertilised by boninitic melts generated in response to subduction initiation and slab-dehydration.The vestiges of Tethyan oceanic lithosphere preserved in NHO represent an accreted intra-oceanic fore arc crust and upper mantle section which records a transitional geodynamic evolution in a SSZ regime marked by subduction initiation,fore arc extension and arc-continent accretion. 展开更多
关键词 Tethyan Ocean Naga hills Ophiolite Suprasubduction Zone Subduction initiation Fore arc extension Mantle refertilisation
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