全文获取类型
收费全文 | 181篇 |
免费 | 4篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 3篇 |
综合类 | 1篇 |
化学工业 | 37篇 |
机械仪表 | 2篇 |
建筑科学 | 9篇 |
能源动力 | 1篇 |
轻工业 | 3篇 |
石油天然气 | 1篇 |
无线电 | 17篇 |
一般工业技术 | 34篇 |
冶金工业 | 12篇 |
自动化技术 | 67篇 |
出版年
2023年 | 1篇 |
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 1篇 |
2019年 | 5篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 10篇 |
2013年 | 18篇 |
2012年 | 2篇 |
2011年 | 15篇 |
2010年 | 8篇 |
2009年 | 8篇 |
2008年 | 12篇 |
2007年 | 8篇 |
2006年 | 12篇 |
2005年 | 7篇 |
2004年 | 10篇 |
2003年 | 7篇 |
2002年 | 6篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 9篇 |
1997年 | 7篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1991年 | 1篇 |
1989年 | 1篇 |
排序方式: 共有187条查询结果,搜索用时 31 毫秒
101.
Bordogna G. Fedrizzi M. Pasi G. 《IEEE transactions on systems, man, and cybernetics. Part A, Systems and humans : a publication of the IEEE Systems, Man, and Cybernetics Society》1997,27(1):126-133
In this paper, a model for group decision-making is proposed and defined in a linguistic context. A multiperson multicriteria decision problem is considered, in which a group of experts is involved in the evaluation of the performances of a set of alternatives with respect to a predefined set of criteria. The objective is to evaluate a consensual judgement and a consensus degree on each alternative. Both the experts' evaluations of the alternatives and the degree of consensus are expressed linguistically. A “soft” consensus degree referred to a fuzzy majority of the experts is proposed based on the concept of linguistic quantifier. The entire process is defined in a linguistic domain and modeled within fuzzy set theory by ordered weighted average (OWA) operators 相似文献
102.
Pasi Luukka 《Expert systems with applications》2009,36(4):7463-7468
In this article, classification method is proposed where data is first preprocessed using fuzzy robust principal component analysis (FRPCA) algorithms to obtain data in a more feasible form. After this we use similarity classifier for the classification. We tested this procedure for breast cancer data and liver-disorder data. The results were quite promising and better classification accuracy was achieved than using traditional PCA and similarity classifier. Fuzzy robust principal component analysis algorithms seem to have the effect that they project these data sets in a more feasible form, and together with similarity classifier classification on accuracy of 70.25% was achieved with liver-disorder data and 98.19% accuracy was achieved with breast cancer data. Compared to the results achieved with traditional PCA and similarity classifier about 4% higher accuracy was achieved with liver-disorder data and about 0.5% higher accuracy was achieved with breast cancer data. 相似文献
103.
Modelling of airborne dust emissions in CNC MDF milling 总被引:1,自引:0,他引:1
Sari Rautio Pasi Hynynen Irma Welling Pasi Hemmilä Arto Usenius Pertti Närhi 《Holz als Roh- und Werkstoff》2007,65(5):335-341
All dust control measures are necessary to reduce dust exposure in MDF (Medium Density Fibreboard)-milling, because of the high amount and fineness of the dust produced and a potential risk of exposure to formaldehyde or other glue chemicals during the machining of MDF. The most effective way of reducing dust exposure is to reduce the emission of dust at the source. Airborne dust emission was studied and modelled in the milling. In the milling of MDF, airborne dust emission was much higher than in the milling of solid materials. Milling of MDF produced airborne particles with a mass median diameter of 6–7 µm. The most significant factor affecting the amount of dust created from milling was average chip thickness. In order to reduce the amount of dust, milling parameters should be chosen so that the average chip thickness is greater than 0.05 mm. The average chip thickness could be obtained with different milling parameters, for example with different combinations of feed and traverse rates. The same chip thicknesses resulted in around the same percentage fraction of fine dust mass regardless of how the average chip thickness was obtained. The relationship between the percentage fraction of fine dust mass from the removed mass (c%) and the chip thickness (hm) was modelled and presented in the form of c% = 0.194 h m -1. The model developed can be used to estimate the percentage fraction of fine dust mass as a function of chip thickness. The model can be used in optimisation programs for CNC milling machines to minimize the airborne dust generated and to reduce dust exposure. 相似文献
104.
Matteo Palmonari Antonio Sala Andrea Maurino Francesco Guerra Gabriella Pasi Giuseppe Frisoni 《Information Systems》2011
From a user perspective, data and services provide a complementary view of an information source: data provide detailed information about specific needs, while services execute processes involving data and returning an informative result as well. For this reason, users need to perform aggregated searches to identify not only relevant data, but also services able to operate on them. At the current state of the art such aggregated search can be only manually performed by expert users, who first identify relevant data, and then identify existing relevant services. 相似文献
105.
Kimmo T. Mattila Markku Komu Reima Karsikas Pasi Hatakka Olli J. Heinonen Martti Kormano 《Magma (New York, N.Y.)》1996,4(2):115-122
In the present study we introduce a new device for exercise magnetic resonance spectroscopy (MRS). It operates in a standard whole-body scanner. Mechanical exertion unit allows maximal 10° to 15° short-arc knee extensions. The device operates hydraulically and is based on isokinetic movement. The force and work conducted are automatically controlled by the electronic control and computer unit. A small surface coil placed on the vastus medialis muscle allows the collection of spectra without interfering spectra from nearby resting muscles. The force used for the extensions can be followed simultaneously as a curve on the screen in the operator's room and the data is transferred to a personal computer for later analysis. Total work and fatigue percentage are also calculated by the device. It also allows the use of different isokinetic exercise protocols. The measurements of force proved reliable in repeat measurements using an isokinetic test device as a control.This device has been used clinically for over a year, is easy to operate, and offers reliable measurements. It is well suited to trials where muscle energy states versus time are followed since it allows noninvasive simultaneous quantification of muscle performance and collecting MRS spectra at rest, during exercise, and in the recovery phase. 相似文献
106.
Binary images can be compressed efficiently using context‐based statistical modeling and arithmetic coding. However, this approach is fully sequential and therefore additional computing power from parallel computers cannot be utilized. We attack this problem and show how to implement the context‐based compression in parallel. Our approach is to segment the image into non‐overlapping blocks, which are compressed independently by the processors. We give two alternative solutions about how to construct, distribute and utilize the model in parallel, and study the effect on the compression performance and execution time. We show by experiments that the proposed approach achieves speedup that is proportional to the number of processors. The work efficiency exceeds 50% with any reasonable number of processors. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
107.
EEG and MEG brain-computer interface for tetraplegic patients. 总被引:1,自引:0,他引:1
Laura Kauhanen Tommi Nykopp Janne Lehtonen Pasi Jyl?nki Jukka Heikkonen Pekka Rantanen Hannu Alaranta Mikko Sams 《IEEE transactions on neural systems and rehabilitation engineering》2006,14(2):190-193
We characterized features of magnetoencephalographic (MEG) and electroencephalographic (EEG) signals generated in the sensorimotor cortex of three tetraplegics attempting index finger movements. Single MEG and EEG trials were classified offline into two classes using two different classifiers, a batch trained classifier and a dynamic classifier. Classification accuracies obtained with dynamic classifier were better, at 75%, 89%, and 91% in different subjects, when features were in the 0.5-3.0-Hz frequency band. Classification accuracies of EEG and MEG did not differ. 相似文献
108.
Cancelli Anthony A.; Lange Stephen M.; Lopez Emily; Kerwin Christine; Matalon Talia; Perlman Lowell; Teta Joseph; Kuralt Sally; Rodriquez Maria; Singer Elaine; Lichtenberg Paul; McDonald Eileen; Pasi Ray; Cohen Amy; Hanson Judith 《Canadian Metallurgical Quarterly》1989,4(4):295
Examined the development, implementation, and evaluation of guidelines for the simultaneous application of clinical replications. The 15 authors served as Ss. Success of the guidelines was evaluated by their ability to yield (1) information concerning the probability of the treatment's success, and (2) hypotheses concerning uncontrolled variables that may limit generalization of the treatment. Results support the validity of the guidelines in accomplishing these purposes. The use of such guidelines may serve as a vehicle for the integration of the roles of researcher and practitioner. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
109.
Subwavelength metallic and dielectric diffraction gratings which rotate the linear polarization of incident light by 90 degrees are examined. Using rigorous diffraction theory in total-internal-reflection configuration, it is shown that full conversion from incident transverse electric field to transverse magnetic zero-order field can be achieved with both dielectric and metallic elements, but dielectric gratings provide higher efficiency and are thus preferable. The fabrication aspects and constraints are discussed in detail and the behavior of the gratings over broad wavelength bands is presented. 相似文献
110.
Elina?MadetojaEmail author Eeva-Kaisa?Rouhiainen Pasi?Tarvainen 《Engineering with Computers》2008,24(2):145-153
In this paper a model-driven decision support system related to paper making is introduced. The intention is to emphasize
the necessity of coupling different modeling techniques, multiobjective optimization, and software engineering in order to
make the end user application realistic, practical and usable. Firstly the paper making process and selected aspects concerning
its mathematical modeling, numerical simulation, and multiobjective optimization are introduced, then the related computerized
system, called a virtual paper making line, is described. In addition, the associated decision support system, which provides
a suitable level of automation to improve the quality of decision making and support the user’s expertise is discussed. Finally,
an example presents different ways of using such a software tool. 相似文献