全文获取类型
收费全文 | 187篇 |
免费 | 18篇 |
国内免费 | 28篇 |
专业分类
系统科学 | 60篇 |
丛书文集 | 2篇 |
教育与普及 | 1篇 |
理论与方法论 | 4篇 |
现状及发展 | 5篇 |
研究方法 | 2篇 |
综合类 | 159篇 |
出版年
2024年 | 1篇 |
2023年 | 5篇 |
2022年 | 4篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2014年 | 9篇 |
2013年 | 7篇 |
2012年 | 8篇 |
2011年 | 11篇 |
2010年 | 29篇 |
2009年 | 11篇 |
2008年 | 10篇 |
2007年 | 8篇 |
2006年 | 30篇 |
2005年 | 10篇 |
2004年 | 8篇 |
2003年 | 15篇 |
2002年 | 13篇 |
2001年 | 3篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 6篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 1篇 |
1991年 | 2篇 |
排序方式: 共有233条查询结果,搜索用时 15 毫秒
101.
Yan Tihua & Wang Baoshu School of Computer Science Technology Xidian Univ. Xi’an P. R. China 《系统工程与电子技术(英文版)》2006,17(1):121-125
1.INTRODUCTIONOGSA[1,2,4,5,7]integrates key grid technologies withWebservices mechanisms to create a distributed sys-temframework based around the grid service.OGSAdefines mechanisms for creating,managing,and ex-changing information among entities called grid ser-vices.Succinctly,a grid service is a Web service thatconforms to a set of conventions(interfaces and be-haviors)that define howa client interacts with a gridservice.As the embodi ment of the information warfare,NCW[2,3,6]is a… 相似文献
102.
Robust Disaster Recovery System Model 总被引:4,自引:0,他引:4
WANG Kun~ SU Rui-dan~ LI Zeng-xin~ CAI Zhen~ ZHOU Li-hua~ . Key Laboratory of Computer Network Information Security of the Ministry of Education Xidian University Xi’an Shaanxi China . National Information Security Engineering Technology Research Center Beijing China 《武汉大学学报:自然科学英文版》2006,11(1):170-174
0 IntroductionAsR eas ekaerych p raonjdec tDe ovfe ltohpem 1e0ntth P Fliavne o fY eCahrin Haig,ha-nTie cmh-portant E-government Experi mental and DemonstrationProject (EEDP) must be able to bear heavy disasters .Based onthe analysis of many kinds of disasters and dis-aster recovery systems (DRS) , we presented a new Ro-bust Disaster Recovery System Model (RDRSM) . Underthe guidance of RDRSM, DRS of EEDP has been con-structed and entered test run condition, which also veri-fiedt… 相似文献
103.
ZHANG Qin-sheng XI You-min WANG Ying-luo.Management School Ocean University of Qingdao Qingdao China.Management School Xi′an Jiaotong University Xi′an China 《系统科学与系统工程学报(英文版)》2002,11(3):280-289
1 IntroductionThe research of the Management Mechanism Design( MMD) has been a focus and a signifi-cant frontier in management science and it is an important problem for top managers offirms to care about.The MMD is meant to find out some Management Mec… 相似文献
104.
WANG Juan WAN Wei |wu .Management School Shanghai Jiaotong University Shanghai China .Management School Xi′an Jiaotong University Xi′an China 《系统科学与系统工程学报(英文版)》2000,(4)
Howafirmfinancesitselfiscalledcapitalstructure.Insimpleterms,capitalstructurereferstothefirm′sproportionofdebtfinancing.ItcanbeillustratedspecificallyasFig.1:1 IndexAnalysisSystemofFinancialStatements1.1 IndexanalysissystemofbalancesheetBalancesheetisalistingofafirm′sassets,liabilitiesandshareholder′sequityonagivendate.Somecapitalstructureindicescanbeacquiredfrombalancesheet:1)Networth=Assets-Liabilities2)Debtratio=Liabilities/Assets3)Debt/equityratio=Liabilities/Stockholder′sequi… 相似文献
105.
106.
107.
Outliers Mining in Time Series Data Sets 总被引:2,自引:0,他引:2
Zheng Binxiang Du Xiuhua & Xi Yugeng Institute of Automation Shanghai Jiaotong University Shanghai P.R.China 《系统工程与电子技术(英文版)》2002,13(1)
1 INTRODUCTIONKnowledgediscoveryindatabases,commonlyreferredtoasdatamining ,isgeneratingenormousinterestsinbothresearchandsoftwareareas.However,muchoftherecentworkhasbeenfocusedonfinding“LargePat terns”whichpresentcharacteristicsoftheinputdataexhibitedby… 相似文献
108.
LI Jian ZHAO ChengGang CAI GuoQing ASREAZAD Saman XU Xi Frank HUANG QiDi 《科学通报(英文版)》2013,58(27):3422-3429
In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water and adsorbed water on the soil behaviour, as well as between the deformations of microand macrostructure. According to the derived input work expression and the work-energy-dissipation relations for an open multiphase thermodynamic system, we establish a thermodynamics-based modelling framework for unsaturated expansive soils with double porosity. 相似文献
109.
Xiancong He Gaopeng Zou Yongxiang Xu Haochun Zhu Hao Jiang Xiaofan Jiang Wei Xi Jingtao Chen Jiawei Wu Shaofeng Yang 《自然科学进展(英文版)》2018,28(4):416-421
The impacts of graphene nanosheets content on microstructure, nano-mechanical and tribological properties of the copper matrix composites were investigated. The graphene nanosheets randomly distributed in copper matrix, which obviously hindered its grain growth. The elastic modulus and nano-hardness of the copper matrix composite with 0.2 wt% graphene nanosheets were enhanced 47.5% and 54.7% compared to these of pure copper, respectively. The average creep degree(5.1%) was lower than that(11.8%) of pure copper in holding stage. The creep rate(ca. 0.016 nm/s) decreased 10 times as that(ca. 0.16 nm/s) of pure copper in steady-state creep. The tribological performances were improved dramatically with increase of graphene nanosheets content. 相似文献
110.
YAO ZhengQuan XIAO GuoQiao & LIANG MeiYan State Key Laboratory of Loess Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an China Graduate University of the Chinese Academy of Sciences Beijing Institute of Geology Geophysics Beijing 《科学通报(英文版)》2010,55(9):787-790
Major element concentrations were analyzed on the sediments of a 203.6-m core from the North China Plain near Tianjin. The chemical index of alteration (CIA), Al2O3-(CaO+Na2O)-K2O diagram and elemental ratios, such as Al/K and Ti/Na, were used to reveal information of chemical weathering in the source regions since the late Pliocene. Results show that the fluvial materials in the North China Plain were derived from vast regions, which were in the early Na and Ca removal stage and underwent numerous upper-crustal recycling processes. Proxies of chemical weathering show a decreasing trend, in parallel with the global cooling since the late Pliocene, suggesting a strong role of the global cooing in controlling the continental chemical weathering intensity. 相似文献