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941.
942.
杨义 《武陵学刊:社会科学版》2006,31(4):1-9
在诗学领域,把长江文明引入中华文明发展的总进程中的首功是屈原。屈原丰富、改造、拓展了中华民族精神结构中诗的神经。屈原对江南湖湘间的诗性文明的开拓,可以从三个方面理解:“重华情结”与“求女异行”:追求长江文明与黄河文明的融合梦;“九歌”世界:开拓民间智慧进入文人传统的巨大潜能;南音真传:地域文化对于审美形态的意义。 相似文献
943.
汾河水污染分析与防治措施 总被引:2,自引:0,他引:2
梁新阳 《科技情报开发与经济》2002,12(6):134-136
对山西省汾河水质污染物的超标倍数进行了统计分析,对比研究了20世纪80年代与90年代汾河干流主要地(市)河段废污水量所占比重,对比分析了不同年代随废水排入河道的有毒有害物质量的变化情况,提出了防治水污染的措施。 相似文献
944.
建国以来塔里木河流域生态环境研究进展与展望 总被引:1,自引:0,他引:1
建国以来,塔里木河流域生态环境研究的内容不断深入,研究的技术和手段也不断地改进。本对这时期塔里木河流域生态环境的研究进展、研究方法和技术作了综述。在此基础上总结了历来的研究经验和存在的问题,并对塔里木河流域生态环境的发展趋势做了展望。 相似文献
945.
介绍了益阳资江一桥原状及有关情况,分析了其病害缘由,提出了拓宽改造方案,计算分析了桥梁承载能力,并通过全桥静载试验检测评定拓宽改造方案的安全性. 相似文献
946.
由于战乱和灾荒等原因,历史时期淮北地区既是一个民众移出的地区,又是一个大规模民众移入的地区。历史时期的人口迁移严重阻碍了淮北地区的经济社会发展进程,加速了该地区的社会变迁,主要体现在:一是引发资源抢夺,形成流民,激化社会矛盾,破坏了社会稳定;二是导致财富减少以及生产方式、经营理念、生活方式等落后,改变了原有的经济结构;三是促使民风、民俗趋于恶化,方言出现新的特征。在淮北地区的社会变迁过程中,移民起到了较大的消极作用,是该地区经济社会衰落的重要因素之一。 相似文献
947.
Monitoring lake changes of Qinghai-Tibetan Plateau over the past30 years using satellite remote sensing data 总被引:8,自引:0,他引:8
Wei Wan Pengfeng Xiao Xuezhi Feng Hui Li Ronghua Ma Hongtao Duan Limin Zhao 《科学通报(英文版)》2014,59(10):1021-1035
During the years 2006–2009,lakes in the Qinghai-Tibetan Plateau(QTP)were investigated using satellite remote sensing strategies.We report the results of this investigation as well as follow-up research and expanded work.For the investigation,we mainly focused on lakes whose areas are more than 1 km2.The remote sensing data that we used included 408 scenes of CBERS CCD images and 5 scenes of Landsat ETM?images in Qinghai Province and Tibet Autonomous Region.All these data were acquired around years 2005–2006.Besides remote sensing images,we also collected 1,259 topographic maps.Numbers and areas of lakes were analyzed statistically,which were then compared with those coming from the first lake investigation(implemented between the1960s and 1980s).According to our investigation,up to and around year 2005–2006,the total number of lakes in the QTP was 1,055(222 in Qinghai and 833 in Tibet),accounting for more than 30%of that of China.Thirty newborn lakes with area[1 km2were found,and 5 dead lakes with initial area[1 km2were also found.Among those 13 big lakes([500 km2),Yamzhog Yumco had seriously shrunk,and it has continued to shrink in recent years;Qinghai Lake had shrunk during the period,but some new researches indicated that it has been expanding since the year 2004;Siling Co,Nam Co,and Chibuzhang Co had expanded in the period.We divided the newborn lakes into six categories according to their forming reasons,including river expansion,wetland conversion,etc.The changes of natural conditions led to the death of four lakes,and human exploitation was the main reason for the death of Dalianhai Lake in Qinghai.We picked out three regions which were sensitive to the change of climate and ecological environment:Nagqu Region,Kekexili Region,and the source area of the Yellow River(SAYR).Lakes in both Nagqu and Kekexili have been expanded;meanwhile,most lakes in the SAYR have obviously been shrunk.These regional patterns of lake changes were highly related to variations of temperature,glacier,precipitation,and evaporation.Our investigation and analysis will provide references for researches related to lake changes in the QTP and the response to climate fluctuations. 相似文献
948.
The impact of damming on geochemical behavior of dissolved inorganic carbon in a karst river 总被引:4,自引:0,他引:4
To determine the impact of damming on the geochemical behavior of dissolved inorganic carbon (DIC) in the Wujiang River basin, field measurements and samples were collected semimonthly for a year. The surface waters of the reservoirs contained concentrations of chlo- rophyll a up to 5.6 times higher than the upstream river. Compared with the entering waters, the contributions of HCO3- and dissolved CO2 to DIC decreased, and the contribution of CO32- to DIC and the carbon isotopic composition of DIC (δ13CDIc) increased in the surface waters of the reservoirs, while in the waters released, the DIC species showed reverse geochemical behaviors. The δ13CDIc ranged from -10.2 %o to 2.5 %0, indicating that significant contributions were from carbonate weathering, photosynthesis, and respiration. After the damming of a river, the bioactivity of phytoplankton was enhanced, and this affected the geochemistry of DIC compared to an unimpacted river and δ13CDIC can be used to discern these changes. High-frequency monitoring of river-reservoir systems is necessary to evaluate the efflux of CO2 and provide a better understanding of the carbon sinks and sources in the impounded river. 相似文献
949.
950.
肖起清 《玉林师范学院学报》2014,(1):13-16,31
民间信仰是非官方的信仰理念、行为习惯和制度化仪式的统一体,具有广泛参与性、空间地域性、多元分散性、自发制度性、民间自主性等基本特征。民间信仰是以生活和历史为基础的民众精神生活,既能传承传统文化,;』导民众的价值追求和道德认知,也能促进民众自我组织和自我约束。 相似文献