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   7238篇
  免费   222篇
  国内免费   71篇
管理学   582篇
劳动科学   2篇
民族学   22篇
人才学   6篇
人口学   113篇
丛书文集   520篇
理论方法论   129篇
综合类   4493篇
社会学   271篇
统计学   1393篇
  2024年   18篇
  2023年   62篇
  2022年   50篇
  2021年   97篇
  2020年   103篇
  2019年   134篇
  2018年   157篇
  2017年   206篇
  2016年   171篇
  2015年   212篇
  2014年   371篇
  2013年   791篇
  2012年   439篇
  2011年   518篇
  2010年   398篇
  2009年   394篇
  2008年   436篇
  2007年   453篇
  2006年   421篇
  2005年   386篇
  2004年   336篇
  2003年   339篇
  2002年   278篇
  2001年   228篇
  2000年   160篇
  1999年   68篇
  1998年   39篇
  1997年   43篇
  1996年   29篇
  1995年   19篇
  1994年   28篇
  1993年   21篇
  1992年   18篇
  1991年   14篇
  1990年   10篇
  1989年   11篇
  1988年   7篇
  1987年   11篇
  1986年   3篇
  1985年   15篇
  1984年   15篇
  1983年   7篇
  1982年   7篇
  1980年   2篇
  1979年   2篇
  1977年   4篇
排序方式: 共有7531条查询结果,搜索用时 0 毫秒
331.
本文采用1996~2015年的31个省市自治区宏观数据,使用动态面板分位数回归方法研究人口受教育程度和居民消费的数量关系。研究结果表明,人口受教育程度对消费有着较为显著的影响,且人口受教育程度对中等消费支出水平的影响略大于高、低消费支出水平的影响,这说明中等消费水平的居民消费受到人口受教育程度的影响更加敏感和有弹性。另外,模型中其他各解释变量系数在各分位数上的差异不大,说明这些影响因素对于不同消费支出水平的消费影响没有太明显差异。  相似文献   
332.
Abstract

Defining product platform architecture is a critical issue to design and develop product variants. Different factors are highly dependent on the architecture type, such as number of variants, to measure modularity level, component commonality, market demand, etc. It is directly related to manage product portfolios and setting up business plan of a company. Before defining a product platform, whether it is modular or integral product designers need to follow specific design guidelines and checklists. This research mainly focuses on to define the platform architecture as well as provides necessary design guidelines and checklists for the product designers. It also highlights an example product of a case company with the objective to clarify/validate the proposed product design approach. In conclusion, this paper outlines the findings from this research and proposed some critical questions need to be answered within the scope of future research potentials.  相似文献   
333.
Evaluating and quantifying human suffering in humanitarian operations offers an innovative and potentially powerful way to assess the performance of humanitarian logistics (HL) and help build optimization models. Previous studies have suggested deprivation cost as a metric and have estimated deprivation cost functions for water using willingness‐to‐pay. Our study proposes deprivation levels, defined as the degree of human suffering caused by lack of access to a good or service, and estimates deprivation level functions using a numerical rating scale. Analyzing data collected from respondents with and without disaster experience, we find that individuals in the latter category estimate deprivation differently from the beneficiaries of disaster relief. Our study demonstrates that deprivation levels can be expressed as logistic growth functions with a typical S‐shape, and that these can be integrated into HL optimization models to better account for human suffering.  相似文献   
334.
Smart manufacturing systems (SMSs) are envisioned to contain highly automated and IT-driven production systems. To address the complexity that arises in such systems, a standard and holistic model for describing its activities and their interrelationships is needed. This paper introduces a factory design and improvement (FDI) activity model and illustrates a case study of FDI in an electromechanical component factory. In essence, FDI is a reference activity model that encompasses a range of manufacturing system activities for designing and improving a factory during its initial development and also its operational phases. The FDI model shows not only the dependency between activities and manufacturing control levels but also the pieces of information and software functions each activity relies on. We envision that the availability of these pieces of information in digital form to integrate across the software functions will increase the agility of factory design and improvement projects. Therefore, our future work lies in contributing to standards for exchanging such information.  相似文献   
335.
The influence of competition level on referees’ decision-making was investigated. Referees’ decisions in 90 handball games (30 games X 3 competition levels) were observed in different situations related to the advantage rule, and 100 referees from two different levels of expertise were subsequently asked to offer explanations for the competition-level effects from the first part of the study. Results revealed that at the highest level of competition referees intervened less frequently with sporting sanctions, but more frequently with disciplinary sanctions. These effects were apparent mainly in immediate intervention situations and unsuccessful advantage situations, but not in successful situations. Referees explained these effects of competition level in terms of a player competence stereotype, in addition to referees’ different expertise across competition level. The implications of the findings for understanding how status-related stereotypes impact on intervention behavior are discussed.  相似文献   
336.
汉字设计字体是现代经济社会高速发展的产物。从文字学角度看,汉字设计字体的出现不是偶然的.社会发展以及入本能的内在需求要求汉字创新求善,并且它的出现符合汉字自身的发展规律。这种设计字体与规范汉字从字形、字音、字义方面既有区别又有联系,以其独特的形式获得强烈的视觉感染力。它使信息传播差异化.有利于普及汉字知识教育和美育,同时具有创造和审美价值。这些潜在的社会价值为汉字设计字体进一步发展打下坚实基础。  相似文献   
337.
以人类聚居环境建设为背景,通过对规划设计中"曲""直"不同层面的对比,分析由于观念问题所导致的认识上的偏差。从价值观念角度出发,探讨以"曲"为象征规划设计的深层内涵,提出其在人类聚居环境建设中的充分性和必要性。  相似文献   
338.
给出了改进的Chebyshev和Butterworth低通原型LC滤波器的解析设计公式.此公式充分利用阶数取整带来的余量,在不改变滤波器阶数的前提下减小了通带波动,极大地方便了集成滤波器的实现.给出了集成有源高通滤波器设计实例,验证了改进的Chebyshev和Butterworth低通原型LC滤波器解析设计公式的有效性.  相似文献   
339.
以胜芳古镇旅游资源开发为例,通过对古镇旅游资源的分析评价、SWOT分析、古镇旅游发展目标与战略等问题的分析,扼要阐释了古镇旅游资源开发的总体设计思路。  相似文献   
340.
本研究构建了世界人口发展健康指数,并对包括中国在内的46个国家(地区)的人口发展健康状况进行了排名。人口发展健康指数不仅直观地反映和比较了各国(地区)人口发展健康度现状,还可以对人口发展健康状况进行预警,从而可以作为各个国家(地区)制定人口相关政策的重要参考。  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