全文获取类型
收费全文 | 1840篇 |
免费 | 43篇 |
国内免费 | 30篇 |
专业分类
财政金融 | 128篇 |
工业经济 | 70篇 |
计划管理 | 518篇 |
经济学 | 244篇 |
综合类 | 464篇 |
运输经济 | 6篇 |
旅游经济 | 9篇 |
贸易经济 | 200篇 |
农业经济 | 80篇 |
经济概况 | 194篇 |
出版年
2024年 | 3篇 |
2023年 | 9篇 |
2022年 | 9篇 |
2021年 | 22篇 |
2020年 | 14篇 |
2019年 | 15篇 |
2018年 | 9篇 |
2017年 | 19篇 |
2016年 | 16篇 |
2015年 | 57篇 |
2014年 | 84篇 |
2013年 | 106篇 |
2012年 | 154篇 |
2011年 | 191篇 |
2010年 | 169篇 |
2009年 | 124篇 |
2008年 | 157篇 |
2007年 | 160篇 |
2006年 | 158篇 |
2005年 | 133篇 |
2004年 | 69篇 |
2003年 | 80篇 |
2002年 | 45篇 |
2001年 | 32篇 |
2000年 | 28篇 |
1999年 | 13篇 |
1998年 | 11篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 7篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
排序方式: 共有1913条查询结果,搜索用时 187 毫秒
51.
52.
Carl Philipson 《Scandinavian actuarial journal》2013,2013(1):26-37
Abstract 1. For the definition of general processes with special regard to those concerned in Collective Risk Theory reference is made to Cramér (Collective Risk Theory, Skandia Jubilee Volume, Stockholm, 1955). Let the independent parameter of such a process be denoted by τ, with the origin at the point of departure of the process and on a scale independent of the number of expected changes of the random function. Denote with p(τ, n)dt the asymptotic expression for the conditional probability of one change in the random function while the parameter passes from τ to τ + dτ: relative to the hypothesis that n changes have occurred, while the parameter passes from 0 to τ. Assume further—unless the contrary is stated—that the probability of more than one change, while the parameter passes from τ to τ + dτ, is of smaller order than dτ. 相似文献
53.
随着社会的进步,对供电依赖的加大,EPS应急电源越来越受到重视,文章对应急电源的工作原理进行了系统的阐述,并结合北京西站行包库改扩建工程电力工程的实例,对EPS应急电源的应用进行了说明。 相似文献
54.
Peter M. Wiedemann Martin Clauberg Corresponding author Cornelia R. Karger Gernot Henseler 《Journal of Risk Research》2013,16(6):513-529
Early risk detection is essential for being able to address the most important environmental health risk‐topics in a persistent and prospective manner. In support of the action programme “Environment and Health” (APUG) of the German Federal Ministry of Health and Social Security (BMGS) and the Federal Ministry for the Environment, Nature Conservation, and Nuclear Safety (BMU) which recommended that a detection and evaluation system for the timely recognition of emerging risk problems be developed, a qualitative feasibility study was commissioned. The results of this study are presented here and support the development of an early risk detection system based on the insights gained from the investigation of case studies and the differentiation and presentation of a risk typology, methods, tools, and suggested organizational processes. The study has shown that early risk detection includes the identification, characterization, evaluation and dissemination of information on possible risks as well as the circumstances of appearance and distribution. The goal is the recognition of possible risks in order for risk management to be able to introduce swift and appropriate measures. Consequently, it can also serve as an instrument towards further development of a balanced and structured implementation of the precautionary principle in the environmental health policy. 相似文献
55.
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
56.
当今社会建筑装修,尤其是对建筑室内装修正是一个发展机遇,其合理性、严肃性、效果、舒适度、美观情况又有很多的探讨之处,本文分析了当前室内工程装修的现状,提出了室内装修的具体措施。 相似文献
57.
以贵州地理的实际情况为基点,针对岩溶地区不同的地质情况,根据笔者多年的从业经验,从勘探方面、施工的原则、及地基处理以及效益方面做出了论述,给出了一些处理方法。 相似文献
58.
本文以霍尔传感器为研究对象,着眼于电气仪表工作实际,从霍尔效应及霍尔元件分析、霍尔传感器基本工作原理分析以及霍尔传感器在电气仪表中的应用分析这三个方面入手,围绕这一中心问题展开了较为详细的分析与阐述,并据此论证了霍尔传感器装置的应用在进一步提高电气仪表工作质量与工作效率的过程中所起到的至关重要的作用与意义。 相似文献
59.
随着现代科学技术的迅猛发展,世界将进入以创新为基础的知识经济时代,科学技术将成为经济发展的最重要的资源和首要的推动力,同时更是全球可持续发展战略的核心。站在知识创新的高度、时代的高度、战略地位的高度,发展GIS成为新世纪全球科技信息化的热点。这篇文章针对GIS的架构、以及实用性来简要探讨GIS的重要性。 相似文献
60.