全文获取类型
收费全文 | 696篇 |
免费 | 5篇 |
专业分类
财政金融 | 46篇 |
工业经济 | 52篇 |
计划管理 | 151篇 |
经济学 | 105篇 |
综合类 | 62篇 |
运输经济 | 14篇 |
旅游经济 | 6篇 |
贸易经济 | 214篇 |
农业经济 | 10篇 |
经济概况 | 41篇 |
出版年
2023年 | 8篇 |
2022年 | 12篇 |
2021年 | 12篇 |
2020年 | 20篇 |
2019年 | 23篇 |
2018年 | 13篇 |
2017年 | 15篇 |
2016年 | 20篇 |
2015年 | 20篇 |
2014年 | 31篇 |
2013年 | 37篇 |
2012年 | 47篇 |
2011年 | 34篇 |
2010年 | 33篇 |
2009年 | 42篇 |
2008年 | 56篇 |
2007年 | 34篇 |
2006年 | 17篇 |
2005年 | 38篇 |
2004年 | 20篇 |
2003年 | 40篇 |
2002年 | 25篇 |
2001年 | 18篇 |
2000年 | 11篇 |
1999年 | 15篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 12篇 |
1994年 | 1篇 |
1993年 | 6篇 |
1992年 | 4篇 |
1991年 | 11篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 5篇 |
1987年 | 5篇 |
排序方式: 共有701条查询结果,搜索用时 15 毫秒
91.
This paper addresses the problem of designing a household waste collection system for rural insular areas using a barge for transportation, based on a novel mixed integer programming model that simultaneously integrates decisions of waste collection sites selection within the islands to be served, visit schedule for each selected collection site, and multi-period vehicle routing. An application to a real-world instance consisting of small rural islands located in the south of Chile shows the effectiveness and complexity of the model, along with the advantages of using a waste compactor instead of transporting the waste using bins onboard a barge. 相似文献
92.
This research focuses on understanding the air taxi operations to determine the number of air taxis required to fulfill the demand for urban air mobility in New York City (NYC). We leverage the Define, Measure, Analyze, Design, and Verify (DMADV) framework and integrate it with the systems simulation approach. Upon investigation, we find that all the parameters linearly impact the vehicle utilization, while other measures are robust, specifically with respect to the seating capacity. It is also recommended to operate initially with 70 air taxis in NYC to achieve a trade-off between customer wait time and vehicle utilization. The proposed approach can act as a recommender system for air taxi companies. 相似文献
93.
Packaging design as a medium for brand communication has a strong impact on the point-of-purchase decision. Therefore, marketers need a keen understanding of how packaging design influences brand perception. Although many studies have investigated the impact of design elements like color or typeface, few have examined the impact of holistic variables like the degree of elaborateness. This study proposes to fill this gap by investigating the influence of the degree of simplicity/complexity in package design on brand perception. The topic is first investigated through a multidisciplinary approach mobilizing the fields of semiotics, art history and marketing. Then, we conduct an experiment in which three bottles of Champagne operationalizing three levels of simplicity/complexity are tested with a sample of 305 consumers. The results indicate that the simplicity/complexity of a package design has a significant impact on brand perception, with simplicity being associated with modernity, reliability, authenticity, success and sobriety and complexity with seniority, joy, imagination, charm, femininity and sophistication. 相似文献
94.
This paper explores the future of the physical store within omnichannel retail and specifically, the prerequisites of the designed retail environment in optimizing customer experience. Adopting an exploratory qualitative approach, primary data was obtained using semi-structured interviews with 20 industry experts.The research makes a valuable contribution to the dearth of extent literature on experiential store spaces of the future, specifically within the fashion field. By connecting three topics of academic research - Omnichannel retail, the role of the physical store and in-store customer experience - it serves to suggest the prerequisites for designed retail environments in optimizing customer experience. 相似文献
95.
96.
本文在对食品机械安全卫生设计问题研究过程中,立足于实际工作情况,从自身工作经验角度出发,分析食品机械安全卫生设计的相关内容,重点从食品加工和机械安全方面出发,探讨其设计的基本内容。 相似文献
97.
Guang Ran 《中国对外贸易(英文版)》2008,(8):50-51
The New China International Exhibition Center (NCIEC) is co-designed by Beijing Institute of Agricultural Design (BIAD) and the TBS Design Group of the United States. 相似文献
98.
本文介绍了一个适用于接收机射频前端的电调频率可变调谐放大器及其设计。该调谐放大器具有调谐速度快、体积小、重量轻等,同时还具有较强的自动增益控制能力。 相似文献
99.
基于DOCSIS的CM和CMTS的设计与实现 总被引:21,自引:0,他引:21
本文从物流产业的发展必须遵循的一般规律出发,认为传统物流是我国目前物流产业发展的重点,但这并不排斥局部领域内现代物流的发展。同时要发展传统物流,从物流产业内部看,就是要培育第三方物流,从物流产业外部看,就是要对传统的物流体制进行彻底改造。 相似文献
100.
玉米经破渣后,经过初步分级将含胚玉米渣分离出来,经提胚、压胚、筛选等工序,将玉米胚芽提取出来,玉米胚芽再经精选可以得到较为纯净的胚芽,用于榨油或者其他用途. 相似文献