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21.
水文计算中的非参数统计方法 总被引:1,自引:0,他引:1
介绍了水文计算中非参数统计方法与参数统计方法的不同,并阐述非参数统计方法在水文频率分析、水文水资源预报及水文资源模拟中的应用。 相似文献
22.
针对引供水工程中如何预防事故和提高事故处理能力的问题,研究并提出了基于面向服务和工作流模型的自动化事故应急预案系统,实现事故的早期侦测、智能诊断和处理流程的自动化、规范化.在已发生的各种事故处理信息的基础上,通过数理统计模型对单个事故预案的各个步骤以及全局事故的险情种类、时间、地域等各个属性进行统计、分析、挖掘,得出预案自优化和事故预防的建议报告,实现事故预警和处理中的决策支持. 相似文献
23.
重大突发性水污染事故的危害不仅造成人民生活质量下降,而且带来巨大的经济损失.常规突发性水污染事故的处理技术包括人工、物理、化学、生物等方法.通过对2005年松花江硝基苯污染事故的研究,发现污染物在水体、冰层、底泥中均有分布,对环境中的水生动植物产生一定影响,并且污染了地下水;采用活性炭吸附技术取得了很好的处理效果.今后应加强对特定污染物的污染特性、应急处理及污染修复技术的研究;在新建和改建污水处理厂时,应考虑特定污染源的应急处理,做好事故发生前的应急准备工作. 相似文献
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25.
Daniele Besomi 《European Journal of the History of Economic Thought》2013,20(1):92-115
In 1926 and 1936 Sraff and Keynes attacked the methodological core of traditional economic theory by showing that the premises of partial equilibrium analysis were mutually inconsistent. this paper aims to show that Harrod neglected Sraffa and Keynes's logical arguments, and only admitted that the tacit assumptions under discussion restricted the domain of validityof the theory to special cases: perfect competition and statics. He then proceeded to generalize the theory to imperfect competition and dynamics by applying the principles (but not the instruments) of traditional analysis. The definition of these domains thus aimede at rescuing as mush as possible from the orthodox approach. 相似文献
26.
冯昀 《广东农工商职业技术学院学报》2004,(1)
统计学是财经管理类学科基础教育的重要一环,统计分析方法在经济领域应用极广,作者结合自身的教学实践,从教学思路、教学方法等方面,提出了对统计教学现状的改革思路。强调统计的实用性,教学中需转变观念,改变教学方法,注重方法的理解及应用,不过多阐述数学的推导过程;注重统计方法的计算机应用,培养定量分析问题解决问题的实际能力。 相似文献
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28.
Ersin Ancel Ann T. Shih Sharon M. Jones Mary S. Reveley James T. Luxhøj Joni K. Evans 《Journal of Risk Research》2013,16(4):428-451
This paper illustrates the development of an object-oriented Bayesian network (OOBN) to integrate the safety risks contributing to an in-flight loss-of-control aviation accident. With the creation of a probabilistic model, inferences about changes to the states of the accident shaping or causal factors can be drawn quantitatively. These predictive safety inferences derive from qualitative reasoning to conclusions based on data, assumptions, and/or premises, and enable an analyst to identify the most prominent causal factors leading to a risk factor prioritization. Such an approach facilitates a mitigation portfolio study and assessment. The model also facilitates the computation of sensitivity values based on perturbations to the estimates in the conditional probability tables. Such computations lead to identifying the most sensitive causal factors with respect to an accident probability. This approach may lead to vulnerability discovery of emerging causal factors for which mitigations do not yet exist that then informs possible future R&D efforts. To illustrate the benefits of an OOBN in a large and complex aviation accident model, the in-flight loss-of-control accident framework model is presented. 相似文献
29.
Yves L. Grize 《Revue internationale de statistique》2015,83(1):135-159
This is an expository paper on applications of statistics in the field of general insurance, also called non‐life insurance. Unlike life insurance where advanced statistical techniques have long been part of financial mathematics and actuarial applications, their use is only relatively recent in non‐life insurance. The business model of insurance companies, especially those active in non‐life insurance, has seen dramatic changes over the last 15 years. The aim of this paper is to convince the readers that especially today non‐life insurance is not only an exciting ground to apply existing modern statistical tools but also a fertile environment for new and challenging statistical developments. The activities of an insurance company can be viewed as an industrial process where data management and data analysis play a key role. That is why a fundamental understanding of data‐related issues (such as data quality, variability, analysis and correct interpretation) is so essential to the insurance business. These are exactly the tasks where professional statisticians excel. Also, a better understanding of the field of general insurance by statisticians will promote fruitful exchanges between actuaries and statisticians, thereby helping to bring actuarial and statistical professional societies closer to each other. Selected examples are used to cover the essential aspects of general insurance, and all of them are based on the author's experience. The paper concludes with some remarks on the role of statisticians working in general insurance. 相似文献
30.
Nicholas Rohde 《Economic Papers: A journal of applied economics and policy》2011,30(4):455-465
There is much debate within the cricket community over the relative greatness of various batters. Attempts to guide this debate using statistical techniques have thus far been unsatisfying due to difficulties in determining appropriate trade‐offs between certain performance criteria. By applying the concepts of opportunity cost and supernormal profit to batting performance we are able to produce a cardinal ranking system that uses non‐arbitrary weightings to rank players. The proposed method is used to score past and current players and we find that the Australian batsman Sir Donald Bradman is the highest performer with India’s Sachin Tendulkar a close second. We also note that there is little public awareness of the greatest women batters and rank England’s Rachael Heyhoe‐Flint and Australia’s Betty Wilson in the first two positions. 相似文献