全文获取类型
收费全文 | 130篇 |
免费 | 9篇 |
专业分类
测绘学 | 11篇 |
大气科学 | 2篇 |
地球物理 | 48篇 |
地质学 | 41篇 |
海洋学 | 3篇 |
天文学 | 18篇 |
综合类 | 4篇 |
自然地理 | 12篇 |
出版年
2024年 | 1篇 |
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 13篇 |
2017年 | 13篇 |
2016年 | 12篇 |
2015年 | 5篇 |
2014年 | 16篇 |
2013年 | 9篇 |
2012年 | 8篇 |
2011年 | 8篇 |
2010年 | 4篇 |
2009年 | 8篇 |
2008年 | 2篇 |
2007年 | 7篇 |
2006年 | 2篇 |
2005年 | 6篇 |
2004年 | 1篇 |
2003年 | 3篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1984年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有139条查询结果,搜索用时 15 毫秒
41.
Kaja Pietsch Paweł Marzec Marcin Kobylarski Tomasz Danek Andrzej Leśniak Artur Tatarata Edward Gruszczyk 《Acta Geophysica》2007,55(2):191-208
The thin-layer build of the Carpathian Foredeep Miocene formations and large petrophysical parameter variation cause seismic
images of gas-saturated zones to be ambiguous, and the location of prospection wells on the basis of anomalous seismic record
is risky. A method that assists reservoir interpretation of standard recorded seismic profiles (P waves) can be a converted wave recording (PS waves).
This paper presents the results of application of a multicomponent seismic survey for the reservoir interpretation over the
Chałupki Dębniańskie gas deposit, carried out for the first time in Poland by Geofizyka Kraków Ltd. for the Polish Oil and
Gas Company. Seismic modeling was applied as the basic research tool, using the SeisMod program based on the finite-difference
solution of the acoustic wave equation and equations of motion. Seismogeological models for P waves were developed using Acoustic Logs; S-wave model (records only from part of the well) was developed on the basis of theoretical curves calculated by means of the
Estymacja program calibrated with average S-velocities, calculated by correlation of recorded P and PS wavefields with 1D modeling.
The conformity between theoretical and recorded wavefields makes it possible to apply the criteria established on the basis
of modeling for reservoir interpretation. Direct hydrocarbon indicators (bright spots, phase change, time sag) unambiguously
identify gas-prone layers within the ChD-2 prospect. A partial range of the indicators observed in the SW part of the studied
profile (bright spot that covers a single, anticlinally bent seismic horizon) points to saturation of the horizon. The proposed
location is confirmed by criteria determined for converted waves (continuous seismic horizons with constant, high amplitude)
despite poorer agreement between theoretical and recorded wavefields. 相似文献
42.
43.
Małgorzata Pisarska‐Jamroży Tomasz Zieliński 《Boreas: An International Journal of Quaternary Research》2014,43(2):330-348
The Drawa sandur, which is the largest, coarse‐grained sandur in Poland, dates from the Pomeranian phase of the Weichselian glaciation (c. 16 ka BP). Using Markov chain analysis we infer that five cycles and five rhythms occur in its proximal part. The cycles dominated by Gt and St lithofacies in the lower part of the sandur succession and by a GDm lithofacies in the upper part, are fining‐upward cycles deposited in braided channels during large ablation floods. Three groups of cycles are distinguished based on their genesis: (i) cycles due to channel‐sheet evolution during large floods; (ii) cycles due to braid‐bar development during initial and advanced diminishing of floods; and (iii) cycles developed in the thalweg or interbar channels. The succession as a whole forms a large‐scale coarsening‐up megacycle (‘sandur megacycle’) which corresponds to a phase of ice‐sheet advance. Because the cyclicity was evident from Markov chain analysis of the sedimentary succession, we suggest that this statistical tool is valuable for reconstruction of glacifluvial sedimentary conditions, particularly as it can shed new light on the palaeogeographical development of sandar. 相似文献
44.
Tomasz Niedzielski 《Pure and Applied Geophysics》2011,168(5):957-959
The objective of the work discussed in this paper was to seek possible links between surface hydrology in Southwestern (SW)
Poland and El Ni?o/Southern Oscillation (ENSO). Although the impact of ENSO on hydrology in Europe has been investigated by
many researchers, no clear picture demonstrating spatial variability of such a teleconnection has yet been unequivocally reported.
In particular, there is no comprehensive study on ENSO–streamflow links for Polish rivers. Herein, discharge time series from
15 sites located at lowland and mountain rivers in SW Poland and different ENSO indices are examined. They include atmospheric
time series (axial component of atmospheric angular momentum, Southern Oscillation Index), oceanic indices (Ni?o 3.4 Index,
Global SST Index), geodetic data (length-of-day), and the combined index (Multivariate ENSO Index). The data span the period
from November 1971 to October 2006. On the basis of cross-correlation and wavelet analyses it was found that there is a weak
but significant link between ENSO and surface hydrology in SW Poland. It is inferred that ENSO episodes may be among a few
factors affecting winter and early spring discharges of rivers in SW Poland and may have a (probably limited) impact on snow-melt
flood generation. 相似文献
45.
Our study has three objectives. We want to investigate (1) whether choropleth maps linked with parallel coordinates help people understand the locations of vulnerable places and the factors making these places vulnerable, (2) whether sparklines that imitate the polylines from a parallel coordinate plot support the understanding of the information provided in that plot, and (3) whether a multiple-view geovisualization approach might be intuitive and useful also for nonexperts. Although we base our work on the functionalities available in the tool called ‘ViewExposed,’ we intend to outline more general conclusions on whether multiple linked views facilitate the understanding of multivariate spatial characteristics. An empirical study with 53 individuals was conducted to obtain insights on these objectives. Our task-based assessment considered the ways in which participants understood the dynamic linking capabilities. Some of the key findings are as follows: (1) even nonexpert users are able to use parallel coordinates linked with choropleth maps; however, only those with extensive inference-making abilities will do so efficiently; (2) parallel coordinates sparklines work as an independent component facilitating the understanding of multivariate data; and (3) the intuitive nature of a multiple-view geovisualization tool is not enough to encourage people to use it. 相似文献
46.
Tymon Zieliński Tomasz Petelski Przemysław Makuch Agata Strzałkowska Agnieszka Ponczkowska Krzysztof M. Markowicz Georgius Chourdakis George Georgoussis Susanne Kratzer 《Acta Geophysica》2012,60(5):1359-1385
This paper presents the results of the studies of aerosol optical properties measured using lidars and sun photometers. We describe two case studies of the combined measurements made in two coastal zones in Crete in 2006 and in Rozewie on the Baltic Sea in 2009. The combination of lidar and sun photometer measurements provides comprehensive information on both the total aerosol optical thickness in the entire atmosphere as well as the vertical structure of aerosol optical properties. Combination of such information with air mass back-trajectories and data collected at stations located on the route of air masses provides complete picture of the aerosol variations in the study area both vertically and horizontally. We show that such combined studies are especially important in the coastal areas where depending on air mass advection directions and altitudes the influence of fine or coarse mode (in this case possibly sea-salt) particles on the vertical structure of aerosol optical properties is an important issue to consider. 相似文献
47.
Krzysztof M. Markowicz Tymon Zieliński Sandra Blindheim Michael Gausa Anna K. Jagodnicka Aleksandra E. Kardas Wojciech Kumala Szymon P. Malinowski Tomasz Petelski Michał Posyniak Tadeusz Stacewicz 《Acta Geophysica》2012,60(5):1308-1337
This paper presents the measurements of a vertical structure of aerosol optical properties performed during the MACRON (Maritime Aerosol, Clouds and Radiation Observation in Norway) campaign, which took place in July and August 2007 at ALOMAR observatory on Andøya island (69.279°N, 16.009°E, elevation 380 m a.s.l.). The mean value of the aerosol optical thickness (AOT) at 500 nm during campaign was 0.12. Significant increase of the AOT above longtime mean value was observed on 7 and 8 August 2007 when the AOT exceeded 0.4 at 500 nm. Analyses of back trajectories show the aerosol transported from over Africa and Central Europe. The aerosol extinction coefficient obtained from the synergy of ceilometer and sun photometer observations reached 0.05–0.08 km?1 (at 1064 nm) in the dust layer. The single scattering albedo at the ALOMAR observatory decreased during the dust episode to 0.93–0.94, which indicates some absorptive aerosols in the lower PBL. 相似文献
48.
49.
Małgorzata M. Wieczorek Waldemar A. Spallek Tomasz Niedzielski Jasmin A. Godbold Imants G. Priede 《Pure and Applied Geophysics》2014,171(6):1029-1045
The paper presents results on the influence of geometric attributes of satellite-derived raster bathymetric data, namely the General Bathymetric Charts of the Oceans, on spatial statistical modelling of marine biomass. In the initial experiment, both the resolution and projection of the raster dataset are taken into account. It was found that, independently of the equal-area projection chosen for the analysis, the calculated areas are very similar, and the differences between them are insignificant. Likewise, any variation in the raster resolution did not change the computed area. Although the differences were shown to be insignificant, for the subsequent analysis we selected the cylindrical equal area projection, as it implies rectangular spatial extent, along with the automatically derived resolution. Then, in the second experiment, we focused on demersal fish biomass data acquired from trawl samples taken from the western parts of ICES Sub-area VII, near the sea floor. The aforementioned investigation into processing bathymetric data allowed us to build various statistical models that account for a relationship between biomass, sea floor topography and geographic location. We fitted a set of generalised additive models and generalised additive mixed models to combinations of trawl data of the roundnose grenadier (Coryphaenoides rupestris) and bathymetry. Using standard statistical techniques—such as analysis of variance, Akaike information criterion, root mean squared error, mean absolute error and cross-validation—we compared the performance of the models and found that depth and latitude may serve as statistically significant explanatory variables for biomass of roundnose grenadier in the study area. However, the results should be interpreted with caution as sampling locations may have an impact on the biomass–depth relationship. 相似文献
50.
Tomasz Walczykiewicz 《Water Resources》2014,41(6):763-773
Due to the fact that water management responds to changing natural and socio-economic conditions its future perspective, depending on multiple and variable factors, is difficult to predict using traditional prognostic methods. The examined hypothesis shows that the scenario development process is a useful method for long-term strategic planning in the water management sector. Research was completed on the basis of expert assessments and panel discussions and structured as a scenario for the development process. The IPCC Emission Scenarios constitute the future development context. The results show that this predictive method is effective. Sensitivity of the results of the applied techniques of development scenarios shows a need for further research. 相似文献