首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   411篇
  免费   35篇
  国内免费   2篇
财政金融   7篇
工业经济   161篇
计划管理   136篇
经济学   42篇
综合类   28篇
旅游经济   4篇
贸易经济   28篇
农业经济   10篇
经济概况   32篇
  2023年   3篇
  2022年   5篇
  2021年   8篇
  2020年   10篇
  2019年   22篇
  2018年   10篇
  2017年   7篇
  2016年   13篇
  2015年   22篇
  2014年   51篇
  2013年   24篇
  2012年   57篇
  2011年   55篇
  2010年   39篇
  2009年   14篇
  2008年   19篇
  2007年   19篇
  2006年   10篇
  2005年   17篇
  2004年   19篇
  2003年   11篇
  2002年   3篇
  2001年   2篇
  2000年   6篇
  1999年   2篇
排序方式: 共有448条查询结果,搜索用时 62 毫秒
1.
How does neighbors' income affect individual well‐being? Our analysis is based on rich U.S. local data from the Behavioral Risk Factor Surveillance System, which contains information on where respondents live and their self‐reported well‐being. We find that the effect of neighbors' income on individuals' self‐reported well‐being varies with the size of the neighborhood included. In smaller areas such as ZIP codes, we find a positive relationship between median income and individuals' life satisfaction, whereas it is the opposite at the county, MSA, and state levels. We provide evidence that local public goods and local area characteristics such as unemployment, criminality, and poverty rates drive the association between satisfaction and neighbors' income at the ZIP code level. The neighbors' income effects are mainly concentrated among poorer individuals and are as large as one quarter of the effect of own income on self‐reported well‐being.  相似文献   
2.
We construct individual well‐being measures that respect individual preferences and depend on the bundles of goods consumed by the individual. Building on previous work in which general families of well‐being measures are identified, we introduce basic transfer principles that apply either to bundles or directly to indifference sets, and we characterize specific well‐being measures that involve either the ray utility or the money‐metric utility.  相似文献   
3.
Relative income gap is one of the most popular approaches for explaining the income–happiness relationship. We argue in this article that when people compare their incomes, they care about distributional fairness more than relative income disparity. It is difficult for us to explain China's income–happiness paradox if we simply compare the income gap and do not explore the income‐generation process leading to income inequality. We therefore employ an approach based on a responsibility‐sensitive theory of justice that decomposes individual income into fair and unfair components. As a proxy for distributional unfairness, unfair income is considered the main source of unhappiness. Using data from the Chinese Household Income Project survey, we find strong support for the negative relationship between income unfairness and happiness. We also find a significantly positive relationship between the relative income gap and income unfairness, which leads us to consider the income comparison hypothesis as the explanation for the income–happiness paradox in a new light. Sensitivity analyses confirm the robustness of our results.  相似文献   
4.
[目的]识别低山丘陵区高标准基本农田建设的限制性因素。[方法]基于GIS平台,运用AHP-熵权法,以重庆市高标准基本农田建设的6个典型项目区为例,从田块禀赋、设施配套、投入产出水平、社会经济水平及生态环境等5方面选取15项指标,识别低山丘陵区高标准基本农田建设的限制性因素。[结果](1)低山丘陵区高标准基本农田建设限制性因素依次存在中低山缓坡区丘陵宽谷区河谷平坝区的趋势,且不同微地貌条件下的限制性因素存在一定差异。(2)从项目区评价分值来看,河谷平坝区耕地质量分值最高,为高标准基本农田重点建设区域;丘陵宽谷区建设条件与耕地质量较好,是高标准基本农田建设次重点区域;而中低山缓坡区限制性因子较多,高标准基本农田建设适宜性较差。(3)文章研究的AHP-熵权法可以适用于其他地貌类型单元下高标准基本农田建设限制性因素识别研究。[结论]因地制宜,科学合理安排低山丘陵区微地貌类型下的高标准基本农田建设内容与整治任务。  相似文献   
5.
A large, extant literature examines the effect of political factors on individual subjective well‐being. These studies have treated political factors as a cause and subjective well‐being as an effect. A sparse but growing literature now advances the argument that subjective well‐being is a cause and voting or political participation an effect. In this paper we examine whether subjective well‐being influences voting and political participation in Ghana. Using data from Wave 6 of the World Values Survey in Ghana, we find that subjective well‐being influences neither voting nor protest behavior.  相似文献   
6.
径向水平井技术可为低渗透、稠油、老油田复产和边际油气提供一种经济高效的开采途径。介绍了美国RDS(Radial Drilling Services)径向水平井技术的原理、工艺、设备、施工步骤及现场应用,分析了RDS径向水平井技术在低渗透井、低产井、稠油井和二次开发井中的应用效果。  相似文献   
7.
通过固井封井时井下塞面过高以及管柱卡钻的典型实例,对固井封井时造成塞面过高的原因进行详细剖析,分析常规水泥挤封工艺在施工中存在的问题,优化应用单封隔器挤水泥法、不吐喷法挤水泥等工艺,有效提高固井封井施工质量和作业效率,达到缩短施工周期、降低作业成本的目的。  相似文献   
8.
大庆油田油田不同区块发育的异常高压区、易漏区、浅气和溶解气等,增加了井下作业各类施工的难度和风险。借助于大庆油田高危区域风险预警系统的支持,对油田施工井进行高危区域和高危井的梳理和排查,建立有效的高危井安全施工管理和保障体系,对高危施工井实施升级管理,强化高危井现场施工的组织、监督和管理,有效降低异常井发生率,节约了企业安全费用和管理成本,实现了规模化和常态化施工,现场应用效果显著。  相似文献   
9.
星村煤矿属深井开采,回采的3303工作面埋深为-1170~-1120m,深部冲击危险问题突出,为避免回采工作面发生冲击地压事故,通过研究回采工作面冲击地压发生机理,提出相应治理意见,保证回采工作面安全回采。工程实践表明,该技术得到成功应用,保证了工作面的安全回采。  相似文献   
10.
介绍了适用于Φ40mm球座笼统注聚井测试的新型仪器——Φ29mm小直径超声流量计。阐述了该仪器的结构组成、技术指标、现场施工工艺及应用效果分析。说明该仪器能够满足Φ40mm球座笼统注聚井的测试需要,仪器性能稳定可靠,重复性好,测试结果准确合理。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号