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41.
Tahir Husain 《Advances in water resources》1985,8(1):15-21
Elementary precipitation and runoff estimation problems associated with hydrologic data collection networks are formulated in conjunction with the Kalman Filter Estimation Model. Examples involve the estimation of runoff using data from a single precipitation station and also from a number of precipitation stations. The formulations demonstrate the role of state-space, measurement, and estimation equations of the Kalman Filter Model in flood forecasting. To facilitate the formulation, the unit hydrograph concept and antecedent precipitation index is adopted in the estimation model. The methodology is then applied to estimate various flood events in the Carnation Creek of British Columbia. 相似文献
42.
Melih Ertan Çinar Tuncer Katagan Bilal Öztürk Özdemir Egemen Zeki Ergen Ahmet Kocatas Mesut Önen Fevzi Kirkim Kerem Bakir Güley Kurt Ertan Dagli Asli Kaymakçi Sermin Açik Alper Dogan & Tahir Özcan 《Marine Ecology》2006,27(3):229-246
Temporal and spatial variation in soft‐bottom benthic communities following recovery from a pollution episode were studied between January and September 2004 in and around Alsancak Harbor, located in the polluted part of Izmir Bay (Aegean Sea, eastern Mediterranean). Samples were collected at seven stations by van Veen grab. Three additional stations were sampled by means of a beam trawl to take into account large mobile animals and for a better estimate of the local biodiversity. A total of 231 species belonging to 10 zoobenthic groups were found. Polychaetes contributed 90% of the total faunal populations and mollusks 87% of the total biomass in the area. Community parameters varied significantly among stations and sampling periods; number of species ranged from 2 to 79 per 0.1 m2 grab sample; density from 20 to 81,720 ind·m?2; biomass from 0.1 to 4190 g·m?2; Shannon–Wiener diversity index (log2 base) from 0.4 to 4.4; and Pielou's evenness index from 0.11 to 1.0. Collections indicate that a number of species, including those sensitive to pollution, have colonized the area where azoic conditions had been previously reported. A total of six exotic species, Streblospio gynobranchiata, Polydora cornuta, Hydroides dianthus, Hydroides elegans, Anadara demiri and Fulvia fragilis, probably transferred to the area via ballast water or hull fouling, dominated soft or hard substrata in and near Alsancak Harbor. The first two species accounted for more than 70% of the total population in the area, while A. demiri contributed the most to the biomass (93%, at station 7). 相似文献
43.
Yamini Gopalapillai Ismail I. Fasfous John D. Murimboh Tahir Yapici Parthasarathi Chakraborty Chuni L. Chakrabarti 《Aquatic Geochemistry》2008,14(2):99-116
Free metal ion concentration is generally considered a useful indicator of a metal’s bioavailability and ecotoxicity to aquatic
biota. This article reports the speciation of nickel in mining and municipal effluents from Sudbury (Ontario, Canada), and
also in model solutions containing a fully characterized laurentian fulvic acid (LFA) at environmentally relevant concentrations.
A column ion exchange technique (IET) using a cation exchange resin (Dowex 50W-X8) was applied to determine free nickel ion
concentrations. In model solutions, reasonable correlation was found between the predictions of an equilibrium-based computer
speciation code, Windermere Humic Aqueous Model (WHAM) VI, and the results obtained by IET at low nickel-to-fulvic acid ratios.
However at higher mole ratios, the WHAM VI predicted higher free nickel ion concentrations than IET. Only three out of six
effluent samples showed reasonable agreement between the IET and the WHAM VI results, indicating the need for further development
of IET for application to effluent waters. 相似文献
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48.
Karin Şeşetyan Laurentiu Danciu Mine B. Demircioğlu Tümsa Domenico Giardini Mustafa Erdik Sinan Akkar Levent Gülen Mehdi Zare Shota Adamia Anooshiravan Ansari Avetis Arakelyan Ayşegül Askan Mher Avanesyan Hektor Babayan Tamaz Chelidze Raffi Durgaryan Ata Elias Hossein Hamzehloo Khaled Hessami Doğan Kalafat Özkan Kale Arkady Karakhanyan Muhammad Asif Khan Tahir Mammadli Mahmood Al-Qaryouti Mohammad Sayab Nino Tsereteli Murat Utkucu Otar Varazanashvili Muhammad Waseem Hilal Yalçın Mustafa Tolga Yılmaz 《Bulletin of Earthquake Engineering》2018,16(8):3535-3566
The Earthquake Model of Middle East (EMME) Project aimed to develop regional scale seismic hazard and risk models uniformly throughout a region extending from the Eastern Mediterranean in the west to the Himalayas in the east and from the Gulf of Oman in the south to the Greater Caucasus in the North; a region which has been continuously devastated by large earthquakes throughout the history. The 2014 Seismic Hazard Model of Middle East (EMME-SHM14) was developed with the contribution of several institutions from ten countries. The present paper summarizes the efforts towards building a homogeneous seismic hazard model of the region and highlights some of the main results of this model. An important aim of the project was to transparently communicate the data and methods used and to obtain reproducible results. By doing so, the use of the model and results will be accessible by a wide community, further support the mitigation of seismic risks in the region and facilitate future improvements to the seismic hazard model. To this end all data, results and methods used are made available through the web-portal of the European Facilities for Earthquake Hazard and Risk (www.efehr.org). 相似文献
49.
This paper covers the detailed version of the potential raw material deposits at Darukhula and the adjacent areas of Nizampur,
the manufacturing of high-strength Portland cement samples from the same material and comparison of the physical and chemical
parameters for resulting cement with British and Pakistan standard specifications, which include compressive strength, setting
time, consistency, lechatelier expansion, Blaine and insoluble residue. It was found that the raw material available in the
study area meets the standard specifications and the area is feasible for the cement plant installation. The area can provide
raw material which is quite sufficient for the running of a cement plant. 相似文献
50.
Han Han Jahed Armaghani Danial Tarinejad Reza Zhou Jian Tahir M. M. 《Natural Resources Research》2020,29(2):655-667
Natural Resources Research - Flyrock is one of the most important environmental and hazardous issues in mine blasting, which can affect equipment and people, and may lead to fatal accidents.... 相似文献