全文获取类型
收费全文 | 15752篇 |
免费 | 793篇 |
国内免费 | 534篇 |
专业分类
系统科学 | 1400篇 |
丛书文集 | 354篇 |
教育与普及 | 290篇 |
理论与方法论 | 307篇 |
现状及发展 | 924篇 |
研究方法 | 44篇 |
综合类 | 13756篇 |
自然研究 | 4篇 |
出版年
2024年 | 84篇 |
2023年 | 124篇 |
2022年 | 193篇 |
2021年 | 235篇 |
2020年 | 106篇 |
2019年 | 44篇 |
2018年 | 788篇 |
2017年 | 818篇 |
2016年 | 515篇 |
2015年 | 261篇 |
2014年 | 347篇 |
2013年 | 287篇 |
2012年 | 553篇 |
2011年 | 1288篇 |
2010年 | 1134篇 |
2009年 | 804篇 |
2008年 | 945篇 |
2007年 | 1187篇 |
2006年 | 373篇 |
2005年 | 420篇 |
2004年 | 420篇 |
2003年 | 376篇 |
2002年 | 318篇 |
2001年 | 281篇 |
2000年 | 305篇 |
1999年 | 570篇 |
1998年 | 565篇 |
1997年 | 570篇 |
1996年 | 518篇 |
1995年 | 450篇 |
1994年 | 403篇 |
1993年 | 317篇 |
1992年 | 311篇 |
1991年 | 297篇 |
1990年 | 219篇 |
1989年 | 237篇 |
1988年 | 183篇 |
1987年 | 123篇 |
1986年 | 65篇 |
1985年 | 17篇 |
1984年 | 6篇 |
1979年 | 2篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1969年 | 4篇 |
1967年 | 3篇 |
1964年 | 1篇 |
1957年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
The authors concern robust model predictive control for linear continuous systems with polytopic uncertainties and input constraints. At each sampling time, a piecewise constant control sequence is obtained by solving a set of linear matrix inequalities. The sufficient conditions on the existence of the model predictive control are given, and the robust stability of the closed-loop systems is guaranteed. A simulation example illustrates the efficiency of the proposed method. 相似文献
62.
Manuel Gottschick 《Systemic Practice and Action Research》2008,21(6):479-495
This paper deals with the development of scientific policy advice by providing a methodology to foster a social learning process.
The methodology, called participatory Sustainability Impact Assessment (pSIA), aims to structure complex problem situations,
to clarify interests and basic assumptions, to interpret scientific studies, to develop impact assessment, and to explore
sensitivity of uncertainty and lack of information. In pSIA workshops the participants are supposed to build conceptual models
with different modelling methods, like System Dynamics, Value Chain Analysis, and Morphological Analysis. A case study is
presented that describes a workshop series with political as well as academic actors, applying the pSIA approach to an impact
assessment of Economic Partnership Agreements between the European Union and the Eastern and Southern Africa Region.
相似文献
Manuel GottschickEmail: URL: www.agchange.de |
63.
Alexandra Sauer 《Systemic Practice and Action Research》2008,21(6):497-515
The participation of non-state actors in implementation processes is often understood as a means to increase compliance efficiency. But the implementation of spatial policies frequently focuses on pre-established goals, processes and instruments and thus renders difficult open discourse and shared decision-making. This paper introduces conflict pattern analysis (CPA) as a tool that supports the analysis of the actual actor constellation in order to define efficient approaches that avoid common problems of participatory processes. CPA is a semi-formalised method that helps to identify key-actors, their relations and interaction amongst each other as well as their core beliefs, interests and resources. It aggregates this information to interaction patterns that can be compared, classified and linked to different participatory methods on a theoretically informed basis. Particularly on the local and regional level, this could be the first step for successful (participatory) implementation strategies. 相似文献
64.
Different from traditional tax audit, supervision with self-audit is a combination of audit by the taxpayer himself and audit by the tax authority. This paper mainly studies a taxpayer's optimal policy of tax evasion under supervision with self-audit and its related properties, in order to deduce some effective suggestions and theoretical bases to restrain tax evasion. Assuming that only a certain proportion of evaded tax can be discovered when the audit is executed, the authors first formulate a static model with self-audit. This model is divided into two stages. At the first stage, taxpayers declare their taxes, then the tax authority chooses audit objects, based on a known probability, and announces the result; if the taxpayer is chosen, he will enter the second stage, during which he has a chance to pay the evaded tax and the corresponding late fees and then is audited by the tax authority. The authors show the existence and uniqueness of the optimal amount of tax evasion at the first stage and the optimal proportion to self-expose at the second stage. The authors also discuss the related properties of the interior solution, and do elasticity analyses on some parameters. Besides, the authors extend the static model into the corresponding two-period model, and study the existence and uniqueness of the solution of the extended model. Finally, under the assumption that tax evasion can only be discovered with a certain probability when the audit is executed, the authors formulate another static model with self-audit and investigate its properties. 相似文献
65.
COMPARISON OF TWO METHODS OF OPERATING THEATRE PLANNING: APPLICATION IN BELGIAN HOSPITAL 总被引:3,自引:0,他引:3
Sondes CHAABANE~ Nadine MESKENS~ Alain GUINET~ Marius LAURENT~ ~LAMIH laboratory Valenciennes University Valenciennes Cedex France ~MAAD Laboratory FUCAM Mons Belgium ~LIESP Laboratory INSA-Lyon France ~CHU de TIVOLI La Louvière Belgium 《系统科学与系统工程学报(英文版)》2008,17(2):171-186
Operating Theatre is the centre of the hospital management's efforts. It constitutes the most expensive sector with more than 10% of the intended operating budget of the hospital. To reduce the costs while maintaining a good quality of care, one of the solutions is to improve the existent planning and scheduling methods by improving the services and surgical specialty coordination or finding the best estimation of surgical case durations. The other solution is to construct an effective surgical case plan and schedule. The operating theatre planning and scheduling is the two important steps, which aim to make a surgical case programming with an objective of obtaining a realizable and efficient surgical case schedule. This paper focuses on the first step, the operating theatre planning problem. Two planning methods are introduced and compared. Real data of a Belgian university hospital "Tivoli" are used for the experiments. 相似文献
66.
Douglas A. Wilson Victoria Raish Alison Carr-Chellman 《Systemic Practice and Action Research》2017,30(3):277-293
The paper explores cinematic films as a pedagogical tool to promote critical thinking and student discussions in a doctoral-level learning, design, and technology seminar course at a major U.S. research university. These discussions focused on systemic change and systemic thinking concepts. The authors offer evidence from the literature that supports films’ power as a visual metaphor and neurocognitive stimulator to promote development of new perspectives in graduate students on case studies through articulation, reflection, and explanation of their thought processes on change and diffusion of innovation. There are theoretical, political, social, and technological issues that create tensions during any systemic change effort. The goal of using film in this seminar is to equip students with the requisite skills, theoretical frameworks, and interpersonal experiences needed to address these issues within organizations and communities. The change expected from systemic thinking is for students to think more deeply about the interconnectedness of systems and the importance of bottom-up change efforts that consider the perspective of all stakeholders. 相似文献
67.
Learning organisation literature has widely discussed the connections between “double-loop” learning and its significance to organisational performance, but paying little attention to tools and systems that can operationalise “double-loop” learning in organisations. This paper investigates the impact of applying a systems approach for service operations design, expressed as the Vanguard Method (Seddon, Freedom from command and control: a better way to make the work work, 2003), in order to activate “double-loop” learning in service organisations. Two case studies were conducted in the banking mortgage operations and adults’ social care services in the UK, using the dimensions of the learning organisation questionnaire (DLOQ), semi-structured interviews, observations, and documents. The findings of the cross-case analysis support the link of applying the Vanguard Method with operationalising “double-loop” learning through three main factors, namely systematic-operations improvement, organisational capacity development, and outside-in mode of work; that are all embedded into the seven dimensions of the DLOQ. The value of this paper is the introduction of a service operations design tool that can activate “double-loop” learning performance in the fast changing knowledge era. It also provides an impetus for service organisations to creatively influence employees’ competencies to effectively improve internal systems. 相似文献
68.
Vikas Rai Bhatnagar 《Systemic Practice and Action Research》2017,30(4):339-376
This insider action research study differentiates between developing leaders and leadership, evolves a systemic leadership model, and intervenes on the human, social and processes dimensions for developing leadership. This is a real-time study and responds to the organizational reality of fast pace of change and its systemic nature. Consequently, the research too is fast to guide actions and influence positive changes in the organization. As the action research addresses a systemic reality, research and contributions are in multiple aspects, with new techniques having huge implications for theory building as well as improving practice. The study provides a structural solution to perceived lack of commitment in senior colleagues—a syndrome I acronym as HILE (High Intentions and Lukewarm Execution)–by re-designing organizational processes and making time available for its effective utilization in developing leadership. A new technique of triggering major changes in organizations termed “concept sublimation” distils concept from the statements of major stakeholder and sublimates it from lower to higher unit of analysis and to higher levels of positivity. Statistical simplification of a competency framework by applying concepts from Euclidian geometry and making it effective is yet a unique contribution of this action research study. The study adapts the competing values framework in developing a method of assessing cultural congruence of a candidate with the culture of the organization. The uniqueness of the study lies in bridging the gap in the literature by actually and systemically developing leadership in an organization and providing pragmatic insights on developing leadership while also creating knowledge for theory building. 相似文献
69.
The engagement model for problem solving was developed as a response to soft systems methodology being difficult to implement in certain circumstances. In the years since the original paper was published, the model has developed into an iterative problem solving approach for the assessment, creation and implementation of new ideas in difficult problem situations. This case study paper exemplifies the kind of work undertaken through the use of the model and provides a practical scenario for how one might apply it. The case study takes place in a higher education environment and relates to the development of a capstone course for management majors. The paper concludes with suggestions for future research. 相似文献
70.
Cristine Margaret R. Atienza 《Systemic Practice and Action Research》2017,30(6):569-592
This paper features the implementation of an extensive insider action research, exhaustively following the framework of Coghlan and Brannick (2010, 2014). It consisted of two action research projects - the thesis action research and the core action research - which were done in a parallel manner, both following the iterative cycles of constructing, planning, taking, and evaluating action. The thesis action research was aimed at developing a theory on building organizational identity from the viewpoint of an organizational founder. On the other hand, the core action research was focused on promoting the specific identity of the Institute for Integrality, Inc. Quality and rigor were observed in the implementation of the action research cycles. In the fieldwork, there were three main cycles undertaken – understanding organizational identity, fine-tuning the practice of this identity, and designing the integration of this identity in organizational culture. Thereafter, significant learnings were derived from meta-learning in the form of content, process, and premise reflections. Finally, through the critical reflection of the project in the light of the experience and theory, A-Founder’s Integrative Theory of Organizational Identity Building was derived. 相似文献