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排序方式: 共有481条查询结果,搜索用时 975 毫秒
121.
文章通过瑞雷面波法在呼集高速公路路基病害调查中的工作实例及现场工作方法,论述了该技术在高速公路路基病害调查中的应用前景及推广价值. 相似文献
122.
Atiqur Rahman 《GeoJournal》2006,65(3):211-227
The main objectives of the present study are: (i) to assess the income-wise household environmental conditions of the sampled
households in Aligarh city, (ii) to examine income-wise disease profile of the population, (iii) to assess the relationship
between income and four most occurring diseases, (iv) draw out inter-relationship between income, non-ideal household environmental
conditions and environment related diseases. The quality of life and diseases in any urban areas get reflected by the immediate
neighborhood in different parts of the city which depends upon the income strata of the households, their way of living, and
their understanding of their household environment. This is because it is the household environment, which exerts the most
and immediate influence on the life of the people. This study was carried out in order to assess household environmental conditions
(i.e. housing conditions, bathroom and sanitation conditions, water supply conditions, water logging conditions, household
garbage and solid waste, household pests, indoor air and indoor noise pollution) and their effect on the health of the resident
population of Aligarh city. The method includes household survey of Aligarh city using questionnaires. The sampled households
were classified into five income groups from very low to very high. Relationship was tested between income and household environmental
conditions and also between income and diseases using Chi-Square technique. About 55% of the total sampled households suffer
from diarrhea/dysentery, 43% jaundice, 42% malaria and 41% respiratory diseases. About 40% suffer from skin diseases, small
pox/chicken pox. All these diseases are a result of poor household environmental conditions. Whereas 35% people reported other
diseases (i.e. heart disease, hypertension and diabetes), only 14.42% households reported of tuberculosis. The study concludes
that there exists a significant positive relationship between income level and household environmental conditions, and also
between income and various diseases among sampled households of Aligarh city. 相似文献
123.
124.
The North Atlantic Younger Dryas climatic reversal did not cause a glacier advance on Mount Rainier. The glaciers on Mount Rainier seem to have advanced in response to regional or local shifts in climate. However, the Younger Dryas climatic reversal may have affected the Mount Rainier area, causing a cold, but dry, climate unfavorable to glacier advances. Glaciers in the vicinity of Mount Rainier advanced twice during late glacial/early Holocene time. Radiocarbon dates obtained from lake sediments adjacent to the corresponding moraines are concordant, indicating that the ages for the advances are closely limiting. The first advance occurred before 11,300 14C yr BP (13,200 cal yr BP). During the North Atlantic Younger Dryas event, between 11,000 and 10,000 14C yr BP (12,900 and 11,600 cal yr BP), glaciers retreated on Mount Rainier, probably due to a lack of available moisture, but conditions may have remained cold. The onset of warmer conditions on Mount Rainier occurred around 10,000 14C yr BP (11,600 cal yr BP). Organic sedimentation lasted for at least 700 years before glaciers readvanced between 9800 and 8950 14C yr BP (10,900 and 9950 cal yr BP). 相似文献
125.
Prosopis 《Journal of Arid Environments》1995,30(4)
Canker and tip-dieback diseases have been found in field and greenhouse plantings ofProsopisbeing examined in agroforestry trials in South Texas. Several fungal species were associated with the field cankers, most notably aLasiodiplodiaand aPestalotiopsis. In the greenhouse, a tip-dieback as well as a canker disease that began at pruning cuts on the stock plants was seen.Pestalotiopsiswas most commonly isolated from these plants. Isolated cultures of theLasiodiplodiaand thePestalotiopsistogether with several other often associated fungi, (includingAlternariaFusarium) were tested for pathogenicity on young mesquite plants. OnlyLasiodiplodiaandPestalotiopsisproduced cankers under the conditions tested when spores were applied using wound inoculation techniques.Pestalotiopsisrequired high wound inoculation techniques.Pestalotiopsisrequired high humidity and proved much less damaging compared toLasiodiplodia, which closely mimicked the field symptoms. Benlate was found to give the greatest growth inhibition of these fungal pathogens inin vitrofungicide tests. 相似文献
126.
1IntroductionSongbaiTown—thecapitaloftheShengnongjiaforestdistrictisthecenteroflocalpolitics,eco nomicsandculture ,anditisalsoanimportanttourismbase.Butinrecentyears,thelocalinhabi tantsinthisareahavesufferedfromcalculusdiseaseoccasionallyandthediseaseseemstobeofmoreandmorefrequentoccurrence .Thisnotonlycausesmasspanicandinfluencesnormalworkandstudyofthelocalpeople ,butalsobringsaboutnegativeeffectsontouristindustryofthisareaandrestrictsthedevelopmentoflocaleconomy .Inordertounderstandthesta… 相似文献
127.
128.
在研究区生态系统中,岩石、粮作物中硒含量正常,而土壤、水、儿童患头发中硒含量明显不足;人体硒摄入量不足是该区大骨节病病情复发活跃的主要因素之一。采用有效的补硒措施,提高和改善人体硒水平是预防大骨节病复发的关键。 相似文献
129.
新疆现有水库多兴建于20世纪60、70年代,经过了多年长期运行以及建设施工时的资金不足、技术条件差、施工方式落后等问题,部分水库已存在质量和安全隐患,成为病险水库。本文介绍了新疆水库建设的特点,重点分析了病险水库的成因机制,分类统计了垮坝事件的原因。并通过工程实例,针对不同的病因总结了病险水库的整治对策,从而为各种水库的类似病害提供了实践经验和技术方法。 相似文献
130.
Jason K Blackburn rew Curtis Frances Currin Mujica Farrell Jones Patricia Dorn Rosamond Coates 《Transactions in GIS》2008,12(2):249-265
This article describes a web‐based data entry and GIS‐driven mapping system designed for an ethnographic and entomological survey of Chagas’ disease, an emerging zoonotic disease, and Triatoma dimidiata, a primary vector, in the Los Tuxtlas region of Veracruz, Mexico. To better understand this disease in the region, a collaborative, multi‐disciplinary study was initiated to conduct a spatial investigation of T. dimidiata and a community‐by‐community survey of local perceptions of the disease. In order to facilitate such a collaborative effort the CODES‐GIS was developed. This system allows for (near) real‐time mapping, analyses, disease reporting, and results sharing. CODES‐GIS provides a framework for a research team working in a remote area with limited technology, software, or GIS expertise to benefit from (near) real‐time spatial analyses performed at collaborating institutions. The system is bi‐directional, where field personnel can upload data to the system for field‐based map production. Likewise, laboratory personnel can upload diagnostics data for viewing by field personnel. In this way, the system provides a virtual link between the field and the laboratory to increase the speed at which results are returned to the local community. The CODES‐GIS is described along with a selection of study results. 相似文献