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91.
Salam Roquia Ghose Bonosri Shill Badhon Kumar Islam Md. Aminul Islam Abu Reza Md. Towfiqul Sattar Md. Abdus Alam G. M. Monirul Ahmed Bayes 《Natural Hazards》2021,108(3):2589-2589
Natural Hazards - A correction to this paper has been published: https://doi.org/10.1007/s11069-021-04825-3 相似文献
92.
Al-Najjar Tariq Wahsha Mohammad Al-Khushman Mwaffaq Khalaf Maroof Hardage Kyle Hayek Wissam Khadra Khalid Abu Paytan Adina 《Ocean Science Journal》2021,56(4):364-377
Ocean Science Journal - To assess the utility of the seagrass (Halophila stipulacea) for biomonitoring of metal pollution, seagrass samples were collected from four sites along the Jordanian coast... 相似文献
93.
Modified DRASTIC assessment for intrinsic vulnerability mapping of karst aquifers: a case study 总被引:4,自引:1,他引:3
Groundwater in karstic aquifers can be dangerously sensitive to contamination. In this paper, DRASTIC assessment was modified
and applied, for the first time, to address the intrinsic vulnerability for karst aquifers. The theoretical weights of two
of DRASTIC’s parameters (aquifer media and hydraulic conductivity) were modified through sensitivity analysis. Two tests of
sensitivity analyses were carried out: the map removal and the single parameter sensitivity analyses. The modified assessment
was applied for the karst aquifers underlying Ramallah District (Palestine) as a case study. The aquifer vulnerability map
indicated that the case study area is under low, moderate and high vulnerability of groundwater to contamination. The vulnerability
index can assist in the implementation of groundwater management strategies to prevent degradation of groundwater quality.
The modified DRASTIC assessment has proven to be effective because it is relatively straightforward, use data that are commonly
available or estimated and produces an end product that is easily interpreted. 相似文献
94.
Omar Alkouri Husaini Omar Mohammed Abu Shariah Ahmad Rodzi Shattri Mansor Zainuddin Md. Yusof 《Journal of the Geological Society of India》2012,79(5):515-524
Limestone bedrock topography has complex phenomena and highly relief subsurface topography due to the presence of karstic
features. Geotechnical and environmental problems arise whenever foundations are established on the surface of the limestone
bedrock or within the overburden soils. Geographical information system (GIS) and remote sensing are emerging as powerful
techniques widely applicable in natural resources management to detect land use changes and devise strategies based on these
changes. The study focuses on using aerial photography for the detection of changes and effects of mining on geomorphology,
especially the use of sequential images that allows to detect changes taken place from time to time, by using. Volumetric
Surface Movement Spatiotemporal Data Model (VSMSDM) application has been employed to create karst terrain surface movements
and visualized 3D information in the Virtual Geographical Information Systems (VGIS). VSMSDM application was implemented by
developing prototype of visualization system using with integrated time in the TIN structure. The data have been collected
from aerial photography in 1981 and 2004, and the results displayed that the proposed data model is able to view the changing
in karst topography to detect significant landscapes and landforms changes. 相似文献
95.
The astrophysical S-factor of the experimental cross section data of the main reactions in the proton–proton chain, i.e. 3He(3He,2p)4He, 3He(4He,γ)7Be and 7Be(p,γ)8B, are reanalyzed by using the exact tunneling probability in nuclear reactions. Our goal is to test this treatment in finding the reaction rate per pair for non-resonant reactions. At low temperatures, the exact treatment is identical to the standard formalism but diverges at higher temperatures. 相似文献
96.
97.
Humood F. Al‐Mudhaf Mohammad N. Al‐Hayan Mustafa I. Selim Abdel‐Sattar I. Abu‐Shady 《洁净——土壤、空气、水》2011,39(12):1068-1080
Three hundred and twenty‐two samples of desalinated household water were collected from 99 sampling locations that covered 95% of Kuwaiti's residential areas. Seventy‐one brands of bottled water were collected from Kuwaiti markets. The water quality parameters that were studied included pH, electrical conductivity (EC), total dissolved solids (TDS), F?, Cl?, Br?, , , , , , , , and the major macronutrients Na+, K+, Ca2+, and Mg2+. The analysis yielded a large range of results for most of these parameters, with differences in some cases exceeding 10‐fold. With a few exceptions, the results were found to comply with US‐EPA and WHO standards. Only the water in two brands of bottled water was acidic (pH < 6.5). The TDS was found to be higher than the US‐EPA regulated value in 4 and 3% of the household samples and bottled water brands, respectively. The fluoride levels were generally higher in bottled water than in household water. However, the household water that was produced by the Doha desalination plant and some of the European brands of bottled water were the best samples studied in terms of their quantity of Ca2+, Mg2+, and Na+ compared with the DRI values for those substances. EC and TDS were positively correlated with , , Na+, K+, Ca2+, and Mg2+ for household water but only with Ca2+ and Mg2+ for bottled water. 相似文献
98.
Humood F. Al‐Mudhaf Mustafa I. Selim Aleksander M. Astel Abdel‐Sattar I. Abu‐Shady 《洁净——土壤、空气、水》2011,39(9):833-843
The present study reveals spatial variability of haloacetic acids and the basic physiochemical properties of drinking water samples through visualization based on the Kriging algorithm and hierarchical cluster analysis. Both projection and statistical method contributed to the logical classification of the indoor and outdoor water samples collected from various governorates covering more than 95% of the residential areas in Kuwait. Clustering of the variables led to the formation of several significant clusters corresponding to the effect of chlorine concentration and its residence time on the formation potential of chlorinated acetic acid derivatives in desalinated drinking water as well as to the total ionic composition of water samples and to the effect of the formation of brominated acetic acid derivatives. Clustering of samples, both indoor and outdoor, indicated that all of governorates located in the northern part of Kuwait are supplied with water containing high concentrations of chlorinated acetic acid derivatives, whereas significantly lower amounts of chlorinated or monobrominated acetic acids were found in water samples in the central and southern parts of the country. 相似文献
99.
The Jajiya Member of Jaisalmer Formation yielded a foraminiferal assemblage comprising twenty-three species dominated by the family Vaginulinidae. An Oxfordian age is assigned to the foraminiferal assemblage based on the record of some characteristic Oxfordian species reported from different parts of the world. The foraminiferal assemblage suggests an open marine shelf environment of deposition. 相似文献
100.
Muhammad Nauman Malik Mehdi Murtuza Iqbal Asif Bakar Muhammad Saifullah Abu Brahim Aissa Dk Nur Afiqah Jalwati Puteri Amer Farhan Rafique 《地下水科学与工程》2014,7(4):373-382
In many circumstances involving heat and mass transfer issues, it is considered impractical to measure the input flux and the resulting state distribution in the domain. Therefore, the need to develop techniques to provide solutions for such problems and estimate the inverse mass flux becomes imperative. Adaptive state estimator (ASE) is increasingly becoming a popular inverse estimation technique which resolves inverse problems by incorporating the semi-Markovian concept into a Bayesian estimation technique, thereby developing an inverse input and state estimator consisting of a bank of parallel adaptively weighted Kalman filters. The ASE is particularly designed for a system that encompasses independent unknowns and /or random switching of input and measurement biases. The present study describes the scheme to estimate the groundwater input contaminant flux and its transient distribution in a conjectural two-dimensional aquifer by means of ASE, which in particular is because of its unique ability to efficiently handle the process noise giving an estimation of keeping the relative error range within 10% in 2-dimensional problems. Numerical simulation results show that the proposed estimator presents decent estimation performance for both smoothly and abruptly varying input flux scenarios. Results also show that ASE enjoys a better estimation performance than its competitor, Recursive Least Square Estimator (RLSE) due to its larger error tolerance in greater process noise regimes. ASE’s inherent deficiency of being slower than the RLSE, resulting from the complexity of algorithm, was also noticed. The chosen input scenarios are tested to calculate the effect of input area and both estimators show improved results with an increase in input flux area especially as sensors are moved closer to the assumed input location. 相似文献