期刊文献+
共找到195,706篇文章
< 1 2 250 >
每页显示 20 50 100
New Species of Hilara (Diptera:Empididae) from Hubei,China
1
作者 刘启飞 李竹 杨定 《Entomotaxonomia》 CSCD 北大核心 2010年第3期195-200,共6页
Four new species of Hilara from Hubei are described: Hilara brevifurcata,sp. nov.,H. brevis,sp. nov.,H. dalongtana,sp. nov.,and H. longa,sp. nov.
关键词 DIPTERA EMPIDIDAE Hilara new species hubei china
下载PDF
Chitinozoans from the Fenxiang Formation (Early Ordovician) of Yichang,Hubei Province,China 被引量:5
2
作者 CHEN Xiaohong Florentin PARIS ZHANG Miao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2008年第2期287-294,共8页
Chitinozoans collected from upper Tremadocian to lower Floian strata of Chenjiahe section, Yichang, western Hubei, China comprise six species belonging respectively to the genera Euconochitina including a new species,... Chitinozoans collected from upper Tremadocian to lower Floian strata of Chenjiahe section, Yichang, western Hubei, China comprise six species belonging respectively to the genera Euconochitina including a new species, Euconochitina fenxiangensis, Lagenochitina and Bursachitina, together with Desmochitina sp. and Eremochitina sp. The chitinozoan succession across the interval is correlated with relevant conodont and chitinozoan biozones and two new regional chitinozoan biozones, the Lagenochitina destombesi Biozone and the Euconochitina symmetrica Biozone are proposed based on their stratigraphic ranges in the Fenxiang to Honghuayuan formations in the Chenjiahe section. 展开更多
关键词 Early Ordovician CHITINOZOA SYSTEMATICS BIOZONATION western hubei china
下载PDF
Giant Induan oolite:A case study from the Lower Triassic Daye Formation in the western Hubei Province,South China 被引量:3
3
作者 Mingxiang Mei Jinhan Gao 《Geoscience Frontiers》 CAS 2012年第6期843-851,共9页
Most Phanerozoic oolites are marked by ooids with a diameter less than 2 mm. Observations on a Neoproterozoic oolite have resulted in a change of concept. The term "pisolite" that traditionally referred to oolites w... Most Phanerozoic oolites are marked by ooids with a diameter less than 2 mm. Observations on a Neoproterozoic oolite have resulted in a change of concept. The term "pisolite" that traditionally referred to oolites with a grain size of more than 2 ram, is now restricted to those coated carbonate grains formed by meteoritic freshwater diagenesis; oolites with a grain size of more than 2 mm are now defined as "giant". Particular unusual giant oolites within a set of oolitic-bank limestones with thicknesses of more than 40 m in the top part of the Lower Triassic (Induan) Daye (Ruiping) Formation at the Lichuan section in the western part of Hubei Province in South China, represent an important sedimentological phenomenon in both the specific geological period and the geological setting that is related to the end-Permian biological mass extinction. Like the giant oolites of the Neoproterozoic that represent deposits where oolites formed in a vast low-angle carbonate ramp at that special geological period, the Triassic Daye Formation at the study section are significant because they provide a comparative example to help understand the evolving carbonate world reflected by oolites, the origin of which is still uncertain, and they give insight into the sedimentation pattern of the desolate sea floor, which resulted from the mass extinction at the turn of the Permian into the Triassic. 展开更多
关键词 Carbonate sedimentology Oolite diversity TRIASSIC Induan hubei Province South china
下载PDF
Research on the Current Status, Paths and Countermeasures of Family Farm Development in China——Investigation and Analysis of Hubei Province 被引量:2
4
作者 曾靖 《Agricultural Science & Technology》 CAS 2017年第11期2188-2192,共5页
The Chinese family farm is the most important new micro subject in the construction and development of modern agriculture in China. The investigation and analysis of the actual situation of Hubei Province showed that ... The Chinese family farm is the most important new micro subject in the construction and development of modern agriculture in China. The investigation and analysis of the actual situation of Hubei Province showed that since the implementation of the household contract management system in rural areas, the family farm has followed the track of gradual development, breakthrough development and normal standardization development. In order to promote the family farm to develop rapidly, orderly and healthily, work must be well done to land circulation, scale management, financial support, financial subsidy, cultivation of leading talents and professional farmers, and providing all-round services. 展开更多
关键词 Chinese family farm hubei Province Development overview Typical analysis Path design
下载PDF
Conversion relationship of rainfall-soil moisture-groundwater in Quaternary thick cohesive soil in Jianghan Plain,Hubei Province,China 被引量:2
5
作者 Tian-wen Liu Cheng Hu +4 位作者 Qing Wang Jun Li Kun Huang Zhi-hua Chen Ting-ting Shi 《China Geology》 2020年第3期462-472,共11页
The scientific field test site of rainfall-soil moisture-groundwater conversion in Dabie Mountain Area–Jianghan Plain is located in the northern region of the Jianghan Plain,the transition zone between the Dabie Moun... The scientific field test site of rainfall-soil moisture-groundwater conversion in Dabie Mountain Area–Jianghan Plain is located in the northern region of the Jianghan Plain,the transition zone between the Dabie Mountain Area and Jianghan Plain.It’s a great field test site to study the material and energy exchange among rainfall,soil moisture,and groundwater of the Earth’s critical zone in subtropical monsoon climate plain areas.This paper analyzed the connection between rainfall and volume water content(VWC)of soil at different depths of several soil profiles,and the dynamic feature of groundwater was discussed,which reveals the rainfall infiltration recharge of Quaternary Upper Pleistocene strata.The results show that the Quaternary Upper Pleistocene aquifer groundwater accepts a little direct rainfall recharge,while the lateral recharge is the main supplement source.There were 75 effective rainfall events among 120 rainfall events during the monitoring period,with an accumulated amount of 672.9 mm,and the percentages of effective rainfall amount and duration time were 62.50%and 91.56%,respectively.The max evaporation depth at the upper part in Quaternary cohesive soil was no less than 1.4 m.The soil profile was divided into four zones:(1)The sensitive zone of rainfall infiltration within 1.4 m,where the material and energy exchange frequently near the interface between atmosphere and soil;(2)the buffer zone of rainfall infiltration between 1.4 m and 3.5 m;(3)the migration zone of rainfall infiltration between 3.5 m and 5.0 m;and(4)the rainfall infiltration and groundwater level co-influenced zone below 5.0 m.The results revealed the reaction of soil moisture and groundwater to rainfall in the area covered by cohesive soil under humid climate in Earth’s critical zone,which is of great theoretical and practical significance for groundwater resources evaluation and development,groundwater environmental protection,ecological environmental improvement,drought disaster prevention,and flood disaster prevention in subtropical monsoon climate plain areas. 展开更多
关键词 Earth’s critical zone Rainfall-soil moisture-groundwater conversion Cohesive soil Scientific field test site Environmental geological survey engineering Jianghan Plain hubei Province china
下载PDF
Availability and Affordability of Therapeutic Monoclonal Antibodies After the New Medical Reform in Hubei Province,China
6
作者 Yu-feng DING Jin-wen ZHANG +4 位作者 Mei-jun XIA Guang-jie WU Wei-jie LI Da FENG Shi-wei GONG 《Current Medical Science》 SCIE CAS 2022年第6期1325-1333,共9页
Objective In 2017,China launched a new round of medical reform(NMR)to address the inaccessibility of high-priced drugs for patients with serious diseases.This study explored the impact of the NMR on the accessibility ... Objective In 2017,China launched a new round of medical reform(NMR)to address the inaccessibility of high-priced drugs for patients with serious diseases.This study explored the impact of the NMR on the accessibility and affordability of high-priced monoclonal antibodies(mAbs),and the effective promotion policies after the NMR.Methods We used a standard method developed by the World Health Organization to conduct two surveys on the availability of mAbs and their prices before and after the NMR in the public hospitals in Hubei province,China.By interviewing hospital pharmacy experts,we identified the potential value of the current NMR in improving the access to therapeutic mAbs.Results The average availability of 13 mAbs increased by 8.1%in the surveyed hospitals of Hubei province after the NMR.The median unit price of 10 mAbs dropped by 34.3%.The average affordability of a treatment cycle of 10 mAbs dropped from 680 days to 298 days of the disposable daily income for a middle-income resident(56.2%reduction).The drug price negotiation of medical insurance inclusion and the promotion of consistent evaluation of generic and original drugs could effectively promote the accessibility of mAbs.However,the zero markup of drug pricing and the limit on the proportion of drug revenues in public hospitals showed certain negative effects on the availability of mAbs.Conclusion Not all current NMR policies play a positive role in promoting the accessibility of mAbs.To further improve the accessibility of mAbs in the future in China,it is therefore critical to increase the investment in independent research and development of high-quality mAbs,establish localized guidelines for the rational use of mAbs in clinical practice,and have a cost-sharing mechanism for high-priced drugs with multiple stakeholders. 展开更多
关键词 AVAILABILITY AFFORDABILITY monoclonal antibody new medical reform hubei province china
下载PDF
A discovery of Silurian tightshale gas in Jianshi,Hubei,China
7
作者 Zhi Zhou Shu-jing Bao +4 位作者 Xiang-lin Chen Shu-fang Yu Ke Chen Tian-xu Guo Qiu-feng Xu 《China Geology》 2018年第1期160-161,共2页
1.Objective The study area is located in the north of Jianshi area, Hubei province.According to the geologic survey,the Silurian black shale in the area is characterized by high abundance of organic matter and high hy... 1.Objective The study area is located in the north of Jianshi area, Hubei province.According to the geologic survey,the Silurian black shale in the area is characterized by high abundance of organic matter and high hydrocarbon potential.From 1980s,Jianghan Oilfield has drilled 7 wells in Jiannan gas field located in the south of study area,which showed different degree of oil and gas and revealed a good exploration prospect for the Silurian strata. 展开更多
关键词 SILURIAN tightshale GAS Jianshi hubei china
下载PDF
Epidemic Hemorrhagic Fever in Hubei Frovince,The Peoples Repulic of China: A Clinical and Serological Study
8
作者 MyronS.Cohenl Jordi Casals +7 位作者 G.D.Hsiung Hsi-enKwei Chien-chingChin Hsin-chenGe Chin-minHsiang PyundW.Lee ClarenceJ.Gibbs D.CarletonGajdusek 《武汉大学学报(医学版)》 CAS 1981年第1期11-27,共17页
Between July 1975 and April 1980, 71 patients were admitted to the 2ndAttached Hospital of Hubei Provincial Medical College in Wuchang withthe diagnosis of Epidemic Hemorrhagic Fever (EHF). The clinical courseamong th... Between July 1975 and April 1980, 71 patients were admitted to the 2ndAttached Hospital of Hubei Provincial Medical College in Wuchang withthe diagnosis of Epidemic Hemorrhagic Fever (EHF). The clinical courseamong these patients was similar to that described for patients with KoreanHemorrhagic Fever, Nephropathica Epidemica of Scandanavia and Hemor-rhagic Fever with Renal Syndrome of the U.S.S.R. The overall mortalitywas 11.2%. Sera obtaincd from some of these patients as well as frompatients admitted to the First Attached Hospital of Hubei Provincial Me-dical College were tested against an antigen associated with Korean He-morrhagic Fever and showed exceedingly high antibody titers. We concludethat EHF in Centfal China represents the same disease process as KoreanHemorrhagic Fever. 展开更多
关键词 In EHF Epidemic Hemorrhagic Fever in hubei Frovince The Peoples Repulic of china A Clinical and Serological Study
下载PDF
Dynamics of the coronavirus disease 2019(COVID-19)epidemic in Wuhan City,Hubei Province and China:a second derivative analysis of the cumulative daily diagnosed cases during the first 85 days
9
作者 Bin Yu Xinguang Chen +2 位作者 Shannan Rich Qiqing Mo Hong Yan 《Global Health Journal》 2021年第1期4-11,共8页
Background:Controlling the coronavirus disease 2019(COVID-19)epidemic requires information beyond new and cumulative cases.This study aims to conduct an in-depth analysis by geographic strata:Wuhan City(hereafter refe... Background:Controlling the coronavirus disease 2019(COVID-19)epidemic requires information beyond new and cumulative cases.This study aims to conduct an in-depth analysis by geographic strata:Wuhan City(hereafter referred to as Wuhan)only,Hubei Province(hereafter referred to as Hubei)excluding Wuhan,and China excluding Hubei.Methods:Daily cumulative confirmed COVID-19 cases between December 8,2019(the date of symptom onset based on patients'recall during the investigation),and March 1,2020,from official sources and published studies were analyzed.The second derivative model was used for information extraction.Data analysis was conducted separately for the three strata.Results:A total of 80026 diagnosed COVID-19 cases were reported during the first 85 days of the epidemic,with 49315 cases from Wuhan,17788 from Hubei excluding Wuhan,and 12923 from China excluding Hubei.Analytical results indicate that the COVID-19 epidemic consists of an Acceleration,a Deceleration,and a Stabilization Phase in all three geographic strata,plus a Silent Attack Phase for Wuhan only.Given the reported incubation period of 14 days,effects of the massive anti-epidemic actions were revealed by both the Acceleration and Deceleration Phases.The Acceleration Phase signaled the effect of the intervention to detect the infected;the Deceleration Phase signaled the declines in new infections after the infected were detected,treated and quarantined.Conclusion:Findings of the study provide new evidence to better monitor the epidemic,evaluate its response to intervention,and predict the trend long.In addition to re-evaluating the control of the COVID-19 epidemic in China,this study provided a model for monitoring outbreaks of COVID-19 in different countries across the world. 展开更多
关键词 Coronavirus disease 2019(COVID-19) First derivative Second derivative china hubei Province Wuhan City
下载PDF
Fabulous Finish Wuhan City, Hubei Province, China
10
作者 Hou Yu(Photographer) 《ChinAfrica》 2019年第12期4-5,共2页
Helalia Johannes (right),a marathon runner from Namibia, wins the women’s5 km title in 15 minutes14.23 seconds at the Seventh CISM Military World Games in Wuhan, capital of central China’s Hubei Province, on October... Helalia Johannes (right),a marathon runner from Namibia, wins the women’s5 km title in 15 minutes14.23 seconds at the Seventh CISM Military World Games in Wuhan, capital of central China’s Hubei Province, on October 24. The 39-yearold runner holds Namibian records in 10 km and 20 km races. 展开更多
关键词 china Fabulous Finish Wuhan City hubei Province
下载PDF
Fossil Association from the Lower Cambrian Yanjiahe Formation in the Yangtze Gorges Area,Hubei,South China 被引量:11
11
作者 GUO Junfeng LI Yong +7 位作者 HAN Jian ZHANG Xingliang ZHANG Zhifei OU Qiang LIU Jianni SHU Degan Shigenori MARUYAMA Tsuyoshi KOMIYA 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2008年第6期1124-1132,共9页
Apart from previously reported Small Shelly Fossils (SSFs), a macroscopic fossil assemblage, comprising abundant algae, cone-shaped tubular fossil forms, and probable impressions of a megascopic metazoan, comes from... Apart from previously reported Small Shelly Fossils (SSFs), a macroscopic fossil assemblage, comprising abundant algae, cone-shaped tubular fossil forms, and probable impressions of a megascopic metazoan, comes from the Lower Cambrian Yanjiahe Formation in the Yangtze Gorges area of western Hubei Province, south China. The visible fossils are preserved in thinlaminated siltstone or muddy siltstone intercalated between 8-15 ram-thick carbonate deposits, probably representing sedimentary settings of a constrained local depression in the shallow water carbonate platform during the Early Cambrian Meishucunian Stage. The macroscopic fossil association provides significant fossil evidence about the evolution of life from the late Precambrian to the 'Cambrian explosion' interval. 展开更多
关键词 macrofossil association Yanjiahe Formation Lower Cambrian Yangtze Gorges Area hubei Province
下载PDF
New Macroscopic Problematic Fossil from the Early Cambrian Yanjiahe Biota,Yichang,Hubei,China 被引量:5
12
作者 GUO Junfeng LI Yong +3 位作者 HAN Huiping OU Qiang ZHOU Jianren ZHENG Yajuan 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2012年第4期791-798,共8页
Yanjiahella gen. nov., a distinctive fossil taxon from the Early Cambrian Yanjiahe Biota in Yichang, Hubei Province, is characterized by: 1) an overall body plan composed of a stalk and a calyx (also arms in some s... Yanjiahella gen. nov., a distinctive fossil taxon from the Early Cambrian Yanjiahe Biota in Yichang, Hubei Province, is characterized by: 1) an overall body plan composed of a stalk and a calyx (also arms in some species); 2) a stalk with closely spaced, transverse wrinkles and a medial, longitudinal ridge; and 3) a calyx preserved with three-dimensional radiating striations, as well as a probable madreporite in some specimens. Three species that can be assigned to this genus, which are Y. ancarpa sp. nov., Y. monocarpa sp. nov., and Y. biscarpa sp. nov. Yanjiahella is comparable to certain echinoderm taxa in terms of morphology and some biological structures, which might indicate the early evolution and diversification of ancestral echinoderm lineages from the early Early Cambrian Yangtze Platform. The discovery of putative echinoderms in the Yanjiahe Biota provides significant clues about the origination and evolution of the deuterostome phylum Echinodermata. 展开更多
关键词 Yanjiahella echinoderm-like organisms Terreneuvian Yanjiahe Biota Yichang hubei
下载PDF
He-Ar-S-Pb Isotopic Compositions of Pyrite:Constraints on the Source of Ore-forming Materials of the Chengchao Skarn Iron Deposit,SE Hubei Province,Eastern China 被引量:3
13
作者 LI Wei XIE Guiqing ZHU Qiaoqiao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第5期1780-1794,共15页
The Chengchao iron deposit,the largest high-grade skarn iron deposit in southeastern Hubei Province,contains considerable amounts of magnetite and by-product anhydrite.To obtain better understanding of the ore-formati... The Chengchao iron deposit,the largest high-grade skarn iron deposit in southeastern Hubei Province,contains considerable amounts of magnetite and by-product anhydrite.To obtain better understanding of the ore-formation process,this study carried out He-Ar-S-Pb multi-isotopic analyses on the pyrites formed during two stages of mineralization.The results indicate that the δ34S values(ranging from 14.0‰ to 17.6‰) of pyrites formed from the two stages have no obvious differences,suggesting that they were not derived from a single magmatic sulfur source.The δ34S values of anhydrite mostly range from 21.9‰ to 28.4‰,similar to that of the Middle Triassic sedimentary anhydrite in the Middle-Lower Yangtze River metallogenic belt(MLYRB).The Pb isotopic compositions of the pyrites of both stages are homogeneous,with values of 208Pb/204Pb,207Pb/204Pb,and-206Pb/204Pb being 38.006-38.257,15.523-15.556,and 17.806-18.052,respectively,indicating a mixed crust-mantle source.The He-Ar results exhibit different compositions of the two stages:the -3He/-4He(R/Ra) and 40Ar/-36Ar values for the early-stage pyrite are 0.46-0.63 and 311-322,respectively,whereas the values for late-stage pyrite are 0.23-0.34 and 305-361,respectively.Both stages of pyrites indicate the multiple sources of the ore-forming fluids,with decreasing amount of magmatic water and increasing amount of modified meteoric water(MASW) during fluid evolution.The Triassic evaporites played an important role in the mineralization process. 展开更多
关键词 He-Ar-S-Pb isotopes EVAPORITES mineralization Chengchao skarn Fe deposit southeastern hubei Province
下载PDF
Palladium,Platinum and Gold Concentrations in Fengshan Porphyry Cu-Mo Deposit,Hubei Province,China 被引量:3
14
作者 WANG Minfang DENG Xiaodong BI Shijian LI Zhanke 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2009年第5期893-901,共9页
The Fengshan porphyry-skarn copper-molybdenum (Cu-Mo) deposit is located in the south-eastern Hubei Province in east China. Cu-Mo mineralization is hosted in the Fengshan granodiorite porphyry stock that intruded th... The Fengshan porphyry-skarn copper-molybdenum (Cu-Mo) deposit is located in the south-eastern Hubei Province in east China. Cu-Mo mineralization is hosted in the Fengshan granodiorite porphyry stock that intruded the Triassic Daye Formation carbonate rocks in the early Cretaceous (-140 Ma), as well as the contact zone between granodiorite porphyry stock and carbonate rocks, forming the porphyry-type and skaru-type association. The Fengshan granodiorite stock and the immediate country rocks are strongly fractured and intensely altered by hydrothermal fluids. In addition to intense skarn alteration, the prominent alteration types are potassic, phyllic, and propylitic, whereas argiilation is less common. Mineralization occurs as veins, stock works, and disseminations, and the main ore minerals are chalcopyrite, pyrite, molybdenite, bornite, and magnetite. The contents of palladium, platinum and gold (Pd, Pt and Au) are determined in nine samples from fresh and mineralized granodiorite and different types of altered rocks. The results show that the Pd content is systematically higher than Pt, which is typical for porphyry ore deposits worldwide. The Pt content ranges from 0.037 tol.765 ppb, and the Pd content ranges between 0.165 and 17.979 ppb. Pd and Pt are more concentrated in porphyry mineralization than skarn mineralization, and have negative correlations with Au. The reconnaissance study presented here confirms the existence of Pd and Pt in the Fengshan porphyry-skarn Cu-Mo deposit. When compared with intracontinent and island arc geotectonic settings, the Pd, Pt, and Au contents in the Fengshan porphyry Cu-Mo deposit in the intracontinent is lower than the continental margin types and island are types. A combination of available data indicates that Pd and Pt were derived from oxidized alkaline magmas generated by the partial melting of an enriched mantle source. 展开更多
关键词 PORPHYRY SKARN copper-molybdenum PALLADIUM PLATINUM GOLD FENGSHAN china
下载PDF
Characteristics of dissolved organic matter in lakes with different eutrophic levels in southeastern Hubei Province,China 被引量:13
15
作者 Weixiang REN Xiaodong WU +5 位作者 Xuguang GE Guiying LIN Mengdie ZHOU Zijie LONG Xinhui YU Wei TIAN 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2021年第4期1256-1276,共21页
Dissolved organic matter(DOM)plays a crucial role in both the carbon cycle and geochemical cycles of other nutrient elements,which is of importance to the management and protection of the aquatic environments.To achie... Dissolved organic matter(DOM)plays a crucial role in both the carbon cycle and geochemical cycles of other nutrient elements,which is of importance to the management and protection of the aquatic environments.To achieve a more comprehensive understanding the characteristics of DOM in the Changjiang(Yangtze)River basin,water samples from four natural lakes(Xiandao,Baoan,Daye,and Qingshan)in southeastern Hubei Province in China with different eutrophication levels were collected and analyzed.The optical characteristics were analyzed using ultraviolet-visible spectrophotometry and excitation-emission matrix spectroscopy coupled with parallel factor analysis.The results show that:(1)two humic-like components(C1 and C2)and two protein-like substances(C3 and C4)of DOM were identified in all waterbodies;(2)C3 originated primarily from the degradation of microalgae and contributed substantially to humic-like components during transformation.C4 was widely present in the Changjiang River basin and its formation was related to microbial activity,rather than algal blooms or seasons.Influenced by the water mixing,the protein-like components were more likely to be transformed by microorganism,whereas humic-like components were more easily to be photobleached;(3)the concentration of DOM and the fluorescence intensity of humic-like components gradually increased with rising lake eutrophication levels.With respect to protein-like components,only C3 showed changes along the eutrophication gradients;(4)DOM showed a high affinity with permanganate index(COD Mn)and chlorophyll a(chl a)while the relationship was variable with phosphorus.This study helps us systematically understand the DOM characteristics,microbial activities,and pollutant transformation in the Changjiang River basin and provides reference to the ecological restoration of aquatic environments. 展开更多
关键词 hubei eutrophic lake dissolved organic matter(DOM) excitation-emission spectra parallel factor analysis
下载PDF
Discovery of shale gas from Wufeng-Longmaxi Formation in Xianfeng area, Hubei Province, China 被引量:4
16
作者 Fan-yang Meng Shi-zhen Li +3 位作者 Si-yu Wei Shou-song Zhang Peng Wang Chao Wang 《China Geology》 2020年第3期493-495,共3页
1.Objective The Xianfeng area in Hubei Province is located in the central anticlinorium of the fold belt in western Hunan-Hubei,with a stable tectonic structure.It was in a deep-water shelf sedimentary environment fro... 1.Objective The Xianfeng area in Hubei Province is located in the central anticlinorium of the fold belt in western Hunan-Hubei,with a stable tectonic structure.It was in a deep-water shelf sedimentary environment from Wufeng period of Late Ordovician to Longmaxi period of Early Silurian,contributing to the formation of organic-rich shale in this area(Li B et al.,2016;Zhang H et al.,2019;Wu X et al.,2019).The well E Feng Di 1(Well EFD1)was drilled in Xianfeng area in the south of the central anticlinorium by preliminary geological survey and favorable shale gas areas optimization.During the drilling,shale gas was discovered from Upper Ordovician Wufeng Formation to Lower Silurian Longmaxi Formation(Wufeng-Longmaxi Formation).The geological conditions for shale gas enrichment were further defined through the analysis of the data obtained from the well drilling,well logging,and sample testing.The discovery will provide an important basis for further exploration and development of shale gas in this area. 展开更多
关键词 SHALE LOGGING hubei
下载PDF
Marginalization of Arable Land and its Correlation with Rural Labor Migration——A Case of Tongcheng County,Hubei Province,China 被引量:4
17
作者 HUANG Li-min LIU Cheng-wu 《Asian Agricultural Research》 2010年第2期6-9,共4页
Based on the introduction of the connotation of marginalization,the index of diagnosing the marginalization degree is put forward.According to the 685 copies of questionnaires on peasant households in Tongcheng County... Based on the introduction of the connotation of marginalization,the index of diagnosing the marginalization degree is put forward.According to the 685 copies of questionnaires on peasant households in Tongcheng County of Hubei Province and the statistical data of local government,marginalization of arable land and its correlation with rural labor migration in Tongcheng County are studied by using aggregative indicator method,clustering analysis method and correlation analysis method.Result shows that marginalization of arable land has happened two times in Tongcheng County since 1985.Dry land has severer marginalization degree than paddy field.There is significant correlation between marginalization degree of arable land and rural labor migration;and the correlation between marginalization degree and rural labor migration in paddy field is greater than that in dry land.Marginalization of arable land will advance the rural labor migration,while in response to the poor current circulation of lands;the rural labor migration will further deepen the marginalization degree.Marginalization of arable land is one of the important factors affecting the labor migration in rural areas. 展开更多
关键词 Arable land using Marginalization of arable land Labor migration CORRELATION china
下载PDF
Association of HLA Alleles(A, B, DRB1) and HIV-1 Infection in the Han Population of Hubei, China 被引量:2
18
作者 李王霞 夏家安 +3 位作者 周霞 马严 沈钢 仇丰武 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2017年第1期131-139,共9页
The HIV susceptibility and resistance alleles in the HLA genes were determined by investigating the distribution characteristics of the HLA alleles(A, B, and DRB1) in HIV-infected individuals of the Han population i... The HIV susceptibility and resistance alleles in the HLA genes were determined by investigating the distribution characteristics of the HLA alleles(A, B, and DRB1) in HIV-infected individuals of the Han population in Hubei, and by comparing these alleles with HIV-negative individuals from the same area. A cohort of 424 HIV-1 infected individuals were chosen as study subjects, and 836 HIV-negative healthy subjects from the same area served as the control population. HLA-A, B, and DRB1 allele typing was performed using polymerase chain reaction-sequence-specific oligonucleotide probes(PCR-SSOP) and polymerase chain reaction-sequencing based typing(PCR-SBT) techniques. Arlequin ver3.0 was used to analyze the allele and haplotype frequencies of HLA-A, B, and DRB 1, whereas Epi Info 7 and SPSS18.0 was used to analyze the differences in the HLA alleles between the HIV-1 positive and HIV-1 negative groups. A*02:03, DRB1*01:01, and DRB1*15:01 alleles and their haplotypes as well as the HLA_Bw4-Bw6 hybrid showed a protective effect on HIV-1 infection. After adjusting for confounding factors such as age and sex, multivariate logistic regression analysis revealed that B*15:02G, DRB1*01:01, and DRB1*15:01 subtypes were the resistance genes of HIV-1 infection, while B*13:01 might increase susceptibility to HIV-1 infection. The correlation between A*02:06 and B*15:01G subtypes and HIV-1 susceptibility was independent of the age and sex of the host. This study demonstrated the influence of genetic factors in humans such as HLA polymorphism on individuals to resist HIV-1 infection. Association studies of HLA polymorphism, susceptibility/resistance to HIV-1 infection, and hosts' genetic background are of significant importance for research on HIV-1 pathogenesis and vaccine design. 展开更多
关键词 human leukocyte antigen human immunodeficiency virus allele susceptibility gene resistance genes china
下载PDF
A path analysis of the cultivated land change in Hubei Province,China 被引量:1
19
作者 Li Chunhua Li Ning Shi Peijun 《Ecological Economy》 2007年第3期243-248,共6页
Hubei Province is one of the critical grain production regions in China with the quantitative cultivated landand good natural condition; it plays an important role in grain security in China. However, owing to rapid e... Hubei Province is one of the critical grain production regions in China with the quantitative cultivated landand good natural condition; it plays an important role in grain security in China. However, owing to rapid economicgrowth, population pressures, anthropogenic activities, and natural disasters, the quality of the cultivated land hassignificantly decreased in recent years and environmental resources are under increasing stress. In order to research onthe mechanism of the change of the cultivated land, this paper analyzes qualitatively the influencing factors of thecultivated land change in Hubei Province from 1978 to 2004, and distinguishes the direct factors from indirect influentones by means of the approach of the path analysis. The result shows that the area of the rent land in the total non-agricultural land, the total population growth and the fixed asset investment are the main factors deciding the change ofthe cultivated land. Meanwhile, the density of the transportation network, the proportion of per capita income of ruralcitizens to that of urban citizens, non-agricultural gross domestic production’s share of the total GDP has a less directeffect but a more indirect influence on the decrease of the cultivated land in Hubei Province. The result means that whilesome factors have less direct influence on the change of the cultivated land, its indirect influence are significant, viceversa. Thus it’s necessary to adopt a comprehensive measurement to protect the cultivated land. 展开更多
关键词 Cultivated land change Correlation analysis Path analysis hubei Province
下载PDF
Fluid migration paths in the marine strata of typical structures in the western Hubei-eastern Chongqing area,China 被引量:3
20
作者 Xu Guosheng Liang Jiaju +4 位作者 Gong Deyu Wang Guozhi Yuan Haifeng Cao Junxing Zhang Chengfu 《Petroleum Science》 SCIE CAS CSCD 2013年第1期1-18,共18页
The western Hubei-eastern Chongqing area is an important prospective zone for oil and gas exploration in the central Yangtze area. Three representative structures, the Xinchang structure, Longjuba gas-bearing structur... The western Hubei-eastern Chongqing area is an important prospective zone for oil and gas exploration in the central Yangtze area. Three representative structures, the Xinchang structure, Longjuba gas-bearing structure and the Jiannan gas field, were selected to analyze biomarker parameters in marine strata and to examine various types of natural gas and hydrocarbon sources. Fluid inclusions; carbon, oxygen, and strontium isotopic characteristics; organic geochemical analysis and simulation of hydrocarbon generation and expulsion history of source rocks were used for tracing fluid migration paths in marine strata of the study area. The Carboniferous-Triassic reservoirs in three typical structures all experienced at least two stages of fluid accumulation. All marine strata above the early Permian were shown to have fluids originating in the Permian rocks, which differed from the late stage fluids. The fluids accumulated in the late Permian reservoirs of the Xinchang structure were Cambrian fluids, while those in the late Carboniferous reservoirs were sourced from a combination of Silurian and Cambrian fluids. A long-distance and large-scale cross-formational flow of fluids destroyed the preservation conditions of earlier accumulated hydrocarbons. A short-distance cross-formational accumulation of Silurian fluids was shown in the late Permian reservoirs of the Longjuba structure with favorable hydrocarbon preservation conditions. The fluid accumulation in the Carboniferous reservoirs of the Jiannan structure mainly originated from neighboring Silurian strata with a small amount from the Cambrian strata. As a result, the Jiannan structure was determined to have the best preservation conditions of the three. Comparative analysis of fluid migration paths in the three structures revealed that the zone with a weaker late tectonism and no superimposition and modification of the Upper and Lower Paleozoic fluids or the Upper Paleozoic zone with the fluid charging from the Lower Paleozoic in the western Hubei-easteru Chongqing area are important target areas for future exploration. 展开更多
关键词 Western hubei-eastern Chongqing area marine strata geochemical tracer fluid migration path
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部