期刊文献+
共找到3,504篇文章
< 1 2 176 >
每页显示 20 50 100
Development Potentials and Benefit Analysis of Efficient Water-saving Irrigation in Lixin County 被引量:2
1
作者 Cheng CAO 《Asian Agricultural Research》 2013年第8期28-31,34,共5页
On the basis of analyzing water resources,crop planning structure,and irrigation mode in Lixin County,potentials and benefits of developing efficient water-saving irrigation in the county were explored to provide refe... On the basis of analyzing water resources,crop planning structure,and irrigation mode in Lixin County,potentials and benefits of developing efficient water-saving irrigation in the county were explored to provide references for its future water-saving irrigation. 展开更多
关键词 EFFICIENT water-saving IRRIGATION potential Benefi
下载PDF
Evaluation of Hydrocarbon Potential Using AVO Analysis in the FORMAT Field, Niger Delta Basin, Nigeria
2
作者 Charles Chibueze Ugbor Onyebuchi Samuel Onyeabor Ifeanyi Celestine Ugwuoke 《Open Journal of Geology》 CAS 2024年第3期403-430,共28页
The study involved the evaluation of the hydrocarbon potential of FORMAT Field, coastal swamp depobelt Niger delta, Nigeria to obtain a more efficient reservoir characterization and fluid properties identification. De... The study involved the evaluation of the hydrocarbon potential of FORMAT Field, coastal swamp depobelt Niger delta, Nigeria to obtain a more efficient reservoir characterization and fluid properties identification. Despite advances in seismic data interpretation using traditional 3D seismic data interpretation, obtaining adequate reservoir characteristics at the finest level had proved very challenging with often disappointing results. A method that integrates the amplitude variation with offfset (AVO) analysis is hereby proposed to better illuminate the reservoir. The Hampson Russell 10.3 was used to integrate and study the available seismic and well data. The reservoir of interest was delineated using the available suite of petrophysical data. This was marked by low gamma ray, high resistivity, and low acoustic impedance between a true subsea vertical depth (TVDss) range of 10,350 - 10,450 ft. The AVO fluid substitution yielded a decrease in the density values of pure gas (2.3 - 1.6 g/cc), pure oil (2.3 - 1.8 g/cc) while the Poisson pure brine increased (2.3 to 2.8 g/cc). Result from FORMAT 26 plots yielded a negative intercept and negative gradient at the top and a positive intercept and positive gradient at the Base which conforms to Class III AVO anomaly. FORMAT 30 plots yielded a negative intercept and positive gradient at the top and a positive intercept and negative gradient at the Base which conforms to class IV AVO anomaly. AVO attribute volume slices decreased in the Poisson ratio (0.96 to - 1.0) indicating that the reservoir contains hydrocarbon. The s-wave reflectivity and the product of the intercept and gradient further clarified that there was a Class 3 gas sand in the reservoir and the possibility of a Class 4 gas sand anomaly in that same reservoir. 展开更多
关键词 AVO analysis Hydrocarbon potential Fluid Properties Reservoir Characterization Petrophysical Data Hampson Russel
下载PDF
Harnessing the Market Potential of the Bamboo Industry in Central Luzon, Philippines: An Analysis of the Internal and External Environment
3
作者 Edgelly Galvez Vitug Sarah Calma Alvarez 《Open Journal of Ecology》 2024年第5期395-418,共24页
The bamboo industry in Central Luzon holds significant promise for economic development and environmental sustainability. This study aims to analyze the internal and external factors influencing the bamboo industry in... The bamboo industry in Central Luzon holds significant promise for economic development and environmental sustainability. This study aims to analyze the internal and external factors influencing the bamboo industry in the region through SWOT and PESTLE analyses. Based on a focus group discussion involving key industry players, the study explores the industry’s strengths, weaknesses, opportunities, and threats, as well as political, economic, social, technological, legal, and environmental factors. Findings reveal the importance of comprehensive strategies that address political stability, economic growth, consumer awareness, technological advancement, legal compliance, and environmental sustainability. Recommendations include capacity-building for production and marketing, the establishment of bamboo treatment facilities, and advocacy for supportive policies. By addressing these factors, the bamboo industry in Central Luzon can realize its potential for socio-economic development and environmental stewardship. 展开更多
关键词 BAMBOO SWOT analysis PESTLE analysis Business Environment Value Addition SUSTAINABILITY Market potential
下载PDF
Analysis of Eco-tourism Tourist Behavior and Potential Market in Taibai Mountain
4
作者 郝春旭 杨莉菲 温亚利 《Journal of Landscape Research》 2010年第6期66-71,76,共7页
This paper provided full and accurate material for Taibai Mountain eco-tourism and forecasted its potential market through investigating on the visitors of Taibai Mountain Nature Reserve and the surrounding forest par... This paper provided full and accurate material for Taibai Mountain eco-tourism and forecasted its potential market through investigating on the visitors of Taibai Mountain Nature Reserve and the surrounding forest parks eco-tourism tourist.By using Excel and mapping method,this study described the sample characteristics and tourist behavior.In addition,this paper also carried on descriptive statistics factorial analysis by using SPSS statistics software,analyzed the potential market according to tourists' characteristics of Taibai Mountain.The survey results showed that visitors of Taibai Mountain Nature Reserve mainly were middle-income young people,and the majority of tourists were with higher education.With the purpose of enjoying the scenery and relaxing,tourists were interested in natural ecological landscape of Taibai Mountain Nature Reserve.Tourists mainly came from Shaanxi Province and preferred to day trip,the travel route was single.There were a small number of tourists travelling for business,conference and medical treatment in Taibai Mountain Nature Reserve.According to the analysis,related countermeasures were given in this paper as the following:① Promoting activities should be focused on the big or medium cities in Shaanxi Province,such as Xi'an,Xianyang,Baoji,etc..Meanwhile,various means should be adopted to expand its influence and raise awareness around the provincial cities for attracting tourists.② Strengthening the infrastructure construction and improving comprehensive tourist reception capacity with the pursuit of the diversity of tourism resources,and create a good environment for the tourism market;③ Focusing on tourism product development;④ Protecting the ecological resources and developing ecotourism. 展开更多
关键词 Taibai MOUNTAIN ECO-TOURISM TOURIST behavior analysis potential MARKET analysis
下载PDF
THE BALANCE BETWEEN SUPPLY AND DEMAND OF WATER RESOURCES AND THE WATER-SAVING POTENTIAL FOR AGRICULTURE IN THE HEXI CORRIDOR 被引量:9
5
作者 GAOQian-zhao DUHu-lin 《Chinese Geographical Science》 SCIE CSCD 2002年第1期23-29,共7页
The Hexi Corridor is an important base of agriculture development inNorthwest China. According to recent statistics, there are 65. 94 x 10~8m^3 of water resourcesavailable in the Hexi Corridor. At present, net consump... The Hexi Corridor is an important base of agriculture development inNorthwest China. According to recent statistics, there are 65. 94 x 10~8m^3 of water resourcesavailable in the Hexi Corridor. At present, net consumption in development and utilization is 43. 33x 10~8m^3. Water supply and demand reach a balance on the recent level of production, but loss ofevaporation and evapotranspiration is as much as 25. 69 x 1010~8m^3. So net use efficiency of waterresources is 59% Based on analyzing balance between water and land considering ecologicalenvironment at present, there exists the serious water shortage in the Shiyang River system whereirrigation lands have overloaded. There is a comparative balance between supply and demand of waterresource in the Heihe River system; and the Sule River system has some surplus water to extendirrigation land. Use of agriculture water accounts for 83. 3% and ecological forest and grass for 6.9% . The Hexi Corridor still has a great potential for water saving in agriculture production.Water-saving efficiency of irrigation is about 10% by using such traditional technologies as furrowand border-dike irrigation and small check irrigation, and water-saving with plastic film cover andtechniques of advanced sprinkler and drip/micro irrigation etc. can save more than 60% of irrigatedwater. Incremental irrigation area for water-saving potential in the Hexi Corridor has beenestimated as 56% - 197% to original irrigation area. So the second water sources can be developedfrom water saving agriculture in the Hexi Corridor under Development of the Western Part of China inlarge scale. This potential can be realized step by step through developing the water-savingmeasures, improving the ecological condition of oasis agriculture, and optimizing allocation ofwater resources in three river systems. 展开更多
关键词 water resources balance between supply and demand water-saving potential ofagriculture hexi corridor
下载PDF
The water-saving potential of using micro-sprinkling irrigation for winter wheat production on the North China Plain 被引量:6
6
作者 ZHAI Li-chao LU Li-hua +4 位作者 DONG Zhi-qiang ZHANG Li-hua ZHANG Jing-ting JIA Xiu-ling ZHANG Zheng-bin 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2021年第6期1687-1700,共14页
The shortage of groundwater resources is a considerable challenge for winter wheat production on the North China Plain.Water-saving technologies and procedures are thus urgently required.To determine the water-saving ... The shortage of groundwater resources is a considerable challenge for winter wheat production on the North China Plain.Water-saving technologies and procedures are thus urgently required.To determine the water-saving potential of using micro-sprinkling irrigation(MSI)for winter wheat production,field experiments were conducted from 2012 to 2015.Compared to traditional flooding irrigation(TFI),micro-sprinkling thrice with 90 mm water(MSI1)and micro-sprinkling four times with 120 mm water(MSI2)increased the water use efficiency by 22.5 and 16.2%,respectively,while reducing evapotranspiration by 17.6 and 10.8%.Regardless of the rainfall pattern,MSI(i.e.,MSI1 or MSI2)either stabilized or significantly increased the grain yield,while reducing irrigation water volumes by 20–40%,compared to TFI.Applying the same volumes of irrigation water,MSI(i.e.,MSI3,micro-sprinkling five times with 150 mm water)increased the grain yield and water use efficiency of winter wheat by 4.6 and 11.7%,respectively,compared to TFI.Because MSI could supply irrigation water more frequently in smaller amounts each time,it reduced soil layer compaction,and may have also resulted in a soil water deficit that promoted the spread of roots into the deep soil layer,which is beneficial to photosynthetic production in the critical period.In conclusion,MSI1 or MSI2 either stabilized or significantly increased grain yield while reducing irrigation water volumes by 20–40%compared to TFI,and should provide water-saving technological support in winter wheat production for smallholders on the North China Plain. 展开更多
关键词 winter wheat grain yield water use efficiency micro-sprinkling irrigation traditional flooding irrigation water-saving potential
下载PDF
Grey relational analysis on the relation between marine environmental factors and oxidation-reduction potential 被引量:12
7
作者 刘学庆 王佳 +1 位作者 张盾 李言涛 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2009年第3期583-586,共4页
The effects of marine environmental factors-temperature (T), dissolved oxygen (DO), salinity (S) and pH--on the oxidation-reduction potential (ORP) of natural seawater were studied in laboratory. The results s... The effects of marine environmental factors-temperature (T), dissolved oxygen (DO), salinity (S) and pH--on the oxidation-reduction potential (ORP) of natural seawater were studied in laboratory. The results show an indistinct relationship between these four factors and the ORE but they did impact the ORP. Common mathematical methods were not applicable for describing the relationship. Therefore, a grey relational analysis (GRA) method was developed. The degrees of correlation were calculated according to GILA and the values of T, pH, DO and S were 0.744, 0.710, 0.692 and 0.690, respectively. From these values, the relations of these factors to the ORP could be described and evaluated, and those of T and pH were relatively major. In general, ORP is influenced by the synergic effect of T, DO, pH and S, with no single factor having an outstanding role. 展开更多
关键词 temperature dissolved oxygen SALINITY PH oxidation-reduction potential (ORP) grey relational analysis (GRA)
下载PDF
Comparative Genomic Analysis of Enterovirus 71 Revealed Six New Potential Neurovirulence-associated Sites 被引量:6
8
作者 JIA Qing Jun CHEN Xin Yu +4 位作者 LI De Zhou XU Juan Juan XU Zhi Gang DUAN Zhi Liang WEN Jin Sheng 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2016年第10期767-772,共6页
In the present study,the complete genomes of four common(4/EV71/Wenzhou/CHN/2014,15/EV71/Wenzhou/CHN/2014,116/EV71/Wenzhou/CHN/2014,and 120/EV71/Wenzhou/CHN/2014)and two virulent(11/EV71/Wenzhou/CHN/2014and 109/EV7... In the present study,the complete genomes of four common(4/EV71/Wenzhou/CHN/2014,15/EV71/Wenzhou/CHN/2014,116/EV71/Wenzhou/CHN/2014,and 120/EV71/Wenzhou/CHN/2014)and two virulent(11/EV71/Wenzhou/CHN/2014and 109/EV71/Wenzhou/CHN/2014)enterovirus 71(EV71)isolates were sequenced and described.They are 7405 bp in length and belong to EV71 sub-genotype C4 (C4a cluster). 展开更多
关键词 CHN UTR EV Comparative Genomic analysis of Enterovirus 71 Revealed Six New potential Neurovirulence-associated Sites
下载PDF
Gold Resources Potential Assessment in Eastern Kunlun Mountains of China Combining Weights-of-evidence Model with GIS Spatial Analysis Technique 被引量:4
9
作者 HE Binbin CHEN Cuihua LIU Yue 《Chinese Geographical Science》 SCIE CSCD 2010年第5期461-470,共10页
Resources potential assessment is one of the fields in geosciences,which is able to take great advantage of GIS technology as a substitution of traditional working methods.The gold resources potential in the eastern K... Resources potential assessment is one of the fields in geosciences,which is able to take great advantage of GIS technology as a substitution of traditional working methods.The gold resources potential in the eastern Kunlun Mountains,Qinghai Province,China was assessed by combining weights-of-evidence model with GIS spatial analysis technique.All the data sets used in this paper were derived from an established multi-source geological spatial database,which contains geological,geophysical,geochemical and remote sensing data.Three multi-class variables,i.e.,structural intersection,Indosinian k-feldspar granite and regional fault,were used in proximity analysis to examine their spatial association with known gold deposits.A prospectivity map was produced by weights-of-evidence model based on seven binary evidential maps,all of which had passed a conditional independence test.The study area was divided into three target zones of high potential,moderate potential and low potential areas,among which high potential areas and moderate potential areas accounted for 20% of the total area and contained 32 of the 43 gold deposits.The results show that the gold resources potential assessment in the eastern Kunlun Mountains has a higher precision. 展开更多
关键词 weights-of-evidence model mineral resources potential assessment eastern Kunlun Mountains spatial analysis conditional independence
下载PDF
A Method Combining Numerical Analysis and Limit Equilibrium Theory to Determine Potential Slip Surfaces in Soil Slopes 被引量:6
10
作者 XIAO Shiguo YAN Liping CHENG Zhiqiang 《Journal of Mountain Science》 SCIE CSCD 2011年第5期718-727,共10页
This paper describes a precise method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes. In this method, the direction of the critical slip surface at any po... This paper describes a precise method combining numerical analysis and limit equilibrium theory to determine potential slip surfaces in soil slopes. In this method, the direction of the critical slip surface at any point in a slope is determined using the Coulomb’s strength principle and the extremum principle based on the ratio of the shear strength to the shear stress at that point. The ratio, which is considered as an analysis index, can be computed once the stress field of the soil slope is obtained. The critical slip direction at any point in the slope must be the tangential direction of a potential slip surface passing through the point. Therefore, starting from a point on the top of the slope surface or on the horizontal segment outside the slope toe, the increment with a small distance into the slope is used to choose another point and the corresponding slip direction at the point is computed. Connecting all the points used in the computation forms a potential slip surface exiting at the starting point. Then the factor of safety for any potential slip surface can be computed using limit equilibrium method like Spencer method. After factors of safety for all the potential slip surfaces are obtained, the minimum one is the factor of safety for the slope and the corresponding potential slip surface is the critical slip surface of the slope. The proposed method does not need to pre-assume the shape of potential slip surfaces. Thus it is suitable for any shape of slip surfaces. Moreover the method is very simple to be applied. Examples are presented in this paper to illustrate the feasibility of the proposed method programmed in ANSYS software by macro commands. 展开更多
关键词 Soil slope Stress field potential slip surface Slope stability Factor of safety Numerical analysis Limit equilibrium method ANSYS software
下载PDF
Short-duration transient visual evoked potentials and color reflectivity discretization analysis in glaucoma patients and suspects 被引量:1
11
作者 Michael Waisbourd Rebekah H.Gensure +7 位作者 Ardalan Aminlari Sonya B.Shah Nitasha Khanna Neil Sood Jeanne Molineaux Alberto Gonzalez Jonathan S.Myers L.Jay Katz 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2017年第2期254-261,共8页
AIM: To evaluate the use of short-duration transient visual evoked potentials(VEP) and color reflectivity discretization analysis(CORDA) in glaucomatous eyes,eyes suspected of having glaucoma,and healthy eyes.MET... AIM: To evaluate the use of short-duration transient visual evoked potentials(VEP) and color reflectivity discretization analysis(CORDA) in glaucomatous eyes,eyes suspected of having glaucoma,and healthy eyes.METHODS: The study included 136 eyes from 136 subjects: 49 eyes with glaucoma,45 glaucoma suspect eyes,and 42 healthy eyes.Subjects underwent Humphrey visual field(VF) testing,VEP testing,as well as peripapillary retinal nerve fiber layer optical coherence tomography imaging studies with post-acquisition CORDA applied.Statistical analysis was performed using means and ranges,ANOVA,post-hoc comparisons using Turkey's adjustment,Fisher's Exact test,area under the curve,and Spearman correlation coefficients.RESULTS: Parameters from VEP and CORDA correlated significantly with VF mean deviation(MD)(P〈0.05).In distinguishing glaucomatous eyes from controls,VEP demonstrated area under the curve(AUC) values of 0.64-0.75 for amplitude and 0.67-0.81 for latency.The CORDA HR1 parameter was highly discriminative for glaucomatous eyes vs controls(AUC=0.94).CONCLUSION: Significant correlations are found between MD and parameters of short-duration transient VEP and CORDA,diagnostic modalities which warrant further consideration in identifying glaucoma characteristics. 展开更多
关键词 short-duration transient visual evoked potentials optical coherence tomography color reflectivity discretization analysis GLAUCOMA
下载PDF
Characteristics and potential analysis of Madagascar hydrocarbon-bearing basins 被引量:2
12
作者 Da-tian Wu Johanne Iomimalala Ramaniraka +4 位作者 Feng-ming Xu Jian-bo Shao Yong-heng Zhou Yuan-dong Zhao Bruno Ralison 《China Geology》 2019年第1期56-66,共11页
Madagascar becomes a large isolated island after its dislocation from East Africa at its western part during the opening of the Mozambique Channel and its separation from India at its eastern part during the opening o... Madagascar becomes a large isolated island after its dislocation from East Africa at its western part during the opening of the Mozambique Channel and its separation from India at its eastern part during the opening of the basin of the Mascarene. From a stratigraphic point of view, Karroo of Madagascar shares substantial similarities with the stratigraphic strata of East Africa.While oil companies have taken a liking to the basins of East Africa, they also turn to the basins in the western part of Madagascar especially after the discovery of large oil fields at Tsimiroro and Bemolanga. According to the study of their geological history, the basins of Madagascar contain huge hydrocarbon potential. The western basins, which is more developed than the east coast of the island, have been the subject of many in-depth studies by numerous researchers. The cross-referencing of bibliographic data with geological studies, and knowledge of hydrocarbon formation and maturation stages, carried out in this study served to determine the nature of source rocks, reservoir rocks, bedrock and eventual trapping system of hydrocarbons in Madagascar. This study identified the properties of Madagascar source rocks, reservoir rocks, bedrock and the final oil and gas trap system by cross-referencing the literature and geological research, oil and gas formation and maturity stages, and shows that Madagascar has considerable hydrocarbon potential. 展开更多
关键词 Madagascar Hydrocarbon-bearing BASINS CHARACTERISTICS of Malagasy BASINS potential analysis Geology and STRATIGRAPHY
下载PDF
Multi-Criteria Analysis Using Remote Sensing and GIS: Insight into Groundwater Potential of the Fissured Aquifers in the Liptako Socle (Southwestern Niger) 被引量:1
13
作者 Maman Sani Abdou Babaye Karimou Dia Hantchi +2 位作者 Ibrahim Wagani Boukari Issoufou Ousmane Issoufou Sandao 《Journal of Water Resource and Protection》 2021年第11期881-899,共19页
In the basement of southwestern Niger, weathering and fractured zones concentrate most of the groundwater. This study focuses on fractured media and aims to identify areas of productivity in this aquifer to improve th... In the basement of southwestern Niger, weathering and fractured zones concentrate most of the groundwater. This study focuses on fractured media and aims to identify areas of productivity in this aquifer to improve the region’s water coverage. The cartographic approach developed made it possible to establish synthetic maps based on multi-criteria analysis. The hydrogeological parameters selected include fracturing data, drainage system, slope and piezometric level as well as shallow and deep lithology. The choice of these criteria is based on their physical meaning but also on the availability of data. The integration of all the criteria in a GIS allowed to generate maps of recharge and potential productivity of fractured aquifers in the area. The validation of these thematic maps with independent data confirms their utility as reference standards for accessibility for future resource exploitation. Like any spatialization tool, potential recharge maps will provide valuable information about areas where infiltration is more important, and help control and manage risk zoning. The upward evacuation effect is even more prominent along the lineaments, faults or fractures: thus, to avoid possible pollution and to locate the future hydraulic structures, the analysis of the potential recharge zones remains necessary. The potential productivity index map, in addition to the very punctual sites identified by the fracturing study, made it possible to define areas of high potential productivity. 展开更多
关键词 Multi-Criteria analysis Fissured Aquifers PRODUCTIVITY Groundwater potential NIGER
下载PDF
Metabonomic analysis of hepatitis B virus-induced liver failure:identification of potential diagnostic biomarkers by fuzzy support vector machine 被引量:11
14
作者 Yong MAO Xin HUANG +3 位作者 Ke YU Hai-bin QU Chang-xiao LIU Yi-yu CHENG 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2008年第6期474-481,共8页
Hepatitis B virus (HBV)-induced liver failure is an emergent liver disease leading to high mortality. The severity of liver failure may be reflected by the profile of some metabolites. This study assessed the potent... Hepatitis B virus (HBV)-induced liver failure is an emergent liver disease leading to high mortality. The severity of liver failure may be reflected by the profile of some metabolites. This study assessed the potential of using metabolites as biomarkers for liver failure by identifying metabolites with good discriminative performance for its phenotype. The serum samples from 24 HBV-indueed liver failure patients and 23 healthy volunteers were collected and analyzed by gas chromatography-mass spectrometry (GC-MS) to generate metabolite profiles. The 24 patients were further grouped into two classes according to the severity of liver failure. Twenty-five eommensal peaks in all metabolite profiles were extracted, and the relative area values of these peaks were used as features for each sample. Three algorithms, F-test, k-nearest neighbor (KNN) and fuzzy support vector machine (FSVM) combined with exhaustive search (ES), were employed to identify a subset of metabolites (biomarkers) that best predict liver failure. Based on the achieved experimental dataset, 93.62% predictive accuracy by 6 features was selected with FSVM-ES and three key metabolites, glyeerie acid, cis-aeonitie acid and citric acid, are identified as potential diagnostic biomarkers. 展开更多
关键词 Metabolite profile analysis potential diagnostic biomarker identification k-nearest neighbor (KNN) Fuzzy supportvector machine (FSVM) Exhaustive search (ES) Gas chromatography-mass spectrometry (GC-MS) Hepatitis B virus (HBV)-induced liver failure
下载PDF
Analysis on Uranium Mineralization Potential of Late Yanshanian Granites in Sichuan of Sanjiang Area 被引量:1
15
作者 YIN Minghui XU Zhengqi +1 位作者 Zhou Ting SUN Kang 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第S1期103-104,共2页
The Sanjiang area is an important granite distribution area in China,except for South China,in which granites is complex and complete.Based on fully collecting date about it,this paper explores the significance of ura... The Sanjiang area is an important granite distribution area in China,except for South China,in which granites is complex and complete.Based on fully collecting date about it,this paper explores the significance of uranium 展开更多
关键词 area analysis on Uranium Mineralization potential of Late Yanshanian Granites in Sichuan of Sanjiang Area
下载PDF
Potential rupture surface model and its ap-plication on probabilistic seismic hazard analysis
16
作者 胥广银 高孟潭 《Acta Seismologica Sinica(English Edition)》 CSCD 2007年第3期302-311,共10页
Potential sources are simplified as point sources or linear sources in current probabilistic seismic hazard analysis (PSHA) methods. Focus size of large earthquakes is considerable, and fault rupture attitudes may h... Potential sources are simplified as point sources or linear sources in current probabilistic seismic hazard analysis (PSHA) methods. Focus size of large earthquakes is considerable, and fault rupture attitudes may have great influence upon the seismic hazard of a site which is near the source. Under this circumstance, it is unreasonable to use the simplified potential source models in the PSHA, so a potential rupture surface model is proposed in this paper. Adopting this model, we analyze the seismic hazard near the Chelungpu fault that generated the Chi-Chi (Jiji) earthquake with magnitude 7.6 and the following conclusions are reached. (1) This model is reasonable on the base of focal mechanism, especially for sites near potential earthquakes with large magnitude; (2) The attitudes of potential rupture surfaces have great influence on the results of probabilistic seismic hazard analysis and seismic zoning. 展开更多
关键词 potential seismic source fault rupture attitude potential rupture surface probabilistic seismic hazard analysis seismic zoning
下载PDF
Dual-parameter Correlation Analysis of the Redox Potential Data of 1-Methyl-2-formyl-5-substituted Pyrroles and their Hydrazones
17
作者 Hai Ying HE Chen Lin +1 位作者 Cheng Xue ZHAO Xi Kui JIANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第12期1097-1100,共4页
By using 1-methyl-2-formyl-5-substituted pyrroles (1-Y), 1-methyl-2-formyl-5-substituted pyrrole phenylhydrazones (2-Y) and 1-methyl-2-formyl-5-substituted pyrrole (4-nitrophenyl)-hydrazones (3-Y) as model structures ... By using 1-methyl-2-formyl-5-substituted pyrroles (1-Y), 1-methyl-2-formyl-5-substituted pyrrole phenylhydrazones (2-Y) and 1-methyl-2-formyl-5-substituted pyrrole (4-nitrophenyl)-hydrazones (3-Y) as model structures for nitrogen-containing heterocyclic aromatic compounds, correlation analysis of their redox potential data show that the transition states (TS) of the polarographic process are mainly affected by the polar effects, but spin-delocalizatin effects also exist. 展开更多
关键词 correlation analysis polar effect spin-delocalization effect redox potential
下载PDF
Screening and functional analysis of potential S genes in Chrysanthemum morifolium 被引量:1
18
作者 Fan Wang Sujuan Xu +4 位作者 Ze Wu Xinghua Zhong Weimin Fang Fadi Chen Nianjun Teng 《Ornamental Plant Research》 2021年第1期42-52,共11页
S genes are the key genes that cause plant self-incompatibility,to find out the key S genes and understand molecular mechanism of self-incompatibility in chrysanthemum,the stigmas and anthers at different developmenta... S genes are the key genes that cause plant self-incompatibility,to find out the key S genes and understand molecular mechanism of self-incompatibility in chrysanthemum,the stigmas and anthers at different developmental stages of'Q10-22-2'—a self-incompatible chrysanthemum cultivar,were used for RNA sequencing.After bioinformatics analysis,13 candidate pistil S genes and five candidate pollen S genes were excavated.A potential pistil S gene was cloned and named as CmSRK1.Meanwhile,a potential pollen S gene was cloned and named as CmPCP1.qRT-PCR revealed that CmSRK1 was specifically expressed in mature stigmas,and CmPCP1 was specifically expressed in anthers 3 d before maturation.Subcellular localization showed that both CmSRK1 and CmPCP1 were located in the nucleus and the cell membrane.Transcriptional activation activity analysis indicated that both of the two proteins had no transcriptional activation activity.Yeast two hybrid assay showed that there was no interaction between CmSRK1 and CmPCP1.CmSRK1 was constructed on the expression vector containing stigma-specific promoter,and CmPCP1 was constructed on the expression vector containing pollen-specific promoter,they were then transformed into Arabidopsis thaliana.Artificial hybridization was performed with transgenic lines containing CmSRK1 as the female parents,and transgenic lines containing CmPCP1 as the male parents.The hybridization results showed that seed sets of two transgenic lines were 19.62%and 11.64%,respectively,while cross-pollinated seed sets of Col-0 was 84.43%.Therefore,it was speculated that CmSRK1 and CmPCP1 might be pistil and pollen S genes of chrysanthemum,respectively,and SI of chrysanthemum belonged to SSI.Citation:Wang F,Xu S,Wu Z,Zhong X,Fang W,et al.2021.Screening and functional analysis of potential S genes in Chrysanthemum morifolium. 展开更多
关键词 potential analysis FUNCTIONAL
下载PDF
Understanding Human Development Potentials and Demands for Greenhouse Gas Emissions:with Empirical Analysis using time series and cross-sectional data
19
作者 Pan JiahuaClobal Change and Economic Development Program, the Chinese Academy of Social Sciences,Beijing 100732, China 《Chinese Journal of Population,Resources and Environment》 2004年第1期26-34,共9页
Based on an investigation of the meaning of development, the neo-classical economic approach to development, and the post-welfarist theory of development, this paper proposes a conceptual framework for understanding h... Based on an investigation of the meaning of development, the neo-classical economic approach to development, and the post-welfarist theory of development, this paper proposes a conceptual framework for understanding human development potentials, while undertaking empirical analysis using cross-sectional and time series data on human development. Human development is associated with basic necessities for subsistence, the quality of life, and political and civil rights, in addition to income indicators. Our analysis suggests that the concept of human development potentials has two dimensions: the rights of development and limits to human development. Both are largely ignored in the neoclassical theory of development. However, human development is not unbounded, which approaches to a relatively fixed constant at given economic, technological and institutional conditions. This conceptual understanding is supported by results from the empirical examination of the relationships between demands for carbon 展开更多
关键词 human development development potentials limits to development carbon emissions empirical analysis
下载PDF
Analysis of Renewable Energy Utilization Potential in Buildings of China
20
作者 Min-hua Cai Lan Tang 《Energy and Power Engineering》 2013年第4期291-293,共3页
As a country of great population, China has increasing building energy consumption continuously. It not only threatens the lack of total energy but also hardens the progress of protecting environment. Therefore, it fo... As a country of great population, China has increasing building energy consumption continuously. It not only threatens the lack of total energy but also hardens the progress of protecting environment. Therefore, it forces the country to accelerate finding substitution application of conventional energy in building, renewable energy building utilization. In base of 2010, this study explores the potential of the renewable energy building utilization by using energy consumption analysis until 2030 and predicts annual alternative quantity of renewable energy in different situations. 展开更多
关键词 RENEWABLE ENERGY Building ENERGY CONSUMPTION potential analysis SCENARIO analysis Method
下载PDF
上一页 1 2 176 下一页 到第
使用帮助 返回顶部