全文获取类型
收费全文 | 159篇 |
免费 | 8篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 22篇 |
金属工艺 | 3篇 |
建筑科学 | 2篇 |
能源动力 | 5篇 |
轻工业 | 7篇 |
水利工程 | 7篇 |
无线电 | 33篇 |
一般工业技术 | 16篇 |
冶金工业 | 1篇 |
自动化技术 | 69篇 |
出版年
2023年 | 5篇 |
2022年 | 10篇 |
2021年 | 11篇 |
2020年 | 9篇 |
2019年 | 6篇 |
2018年 | 7篇 |
2017年 | 9篇 |
2016年 | 9篇 |
2015年 | 9篇 |
2014年 | 13篇 |
2013年 | 11篇 |
2012年 | 14篇 |
2011年 | 11篇 |
2010年 | 12篇 |
2009年 | 11篇 |
2008年 | 7篇 |
2007年 | 4篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2003年 | 1篇 |
2002年 | 1篇 |
2000年 | 1篇 |
1999年 | 1篇 |
排序方式: 共有167条查询结果,搜索用时 15 毫秒
11.
Colin Robert Dimitrios Mamalis Winifred Obande Vasileios Koutsos Conchúr M. Ó Brádaigh Dipa Ray 《应用聚合物科学杂志》2021,138(40):51188
Fiber-metal laminates (FMLs) offer the superior characteristics of polymer composites (i.e., light weight, high strength and stiffness) with the ductility and fracture strength of metals. The bond strength between the two dissimilar materials, composite and metal, dictates the properties and performance of the FMLs. The bonding becomes more critical when the polymer matrix is thermoplastic and hydrophobic in nature. This work employed a novel bonding technique between thermoplastic composites and a metal layer using six different combinations of organic coatings. The flexural, and interlaminar shear strength of the thermoplastic fiber metal laminates (TP-FMLs) were examined to investigate the bond strengths in the different cases along with fracture characteristics revealed from the tested samples using scanning electron microscopy. The viscoelastic performance of the fabricated TP-FMLs were also investigated using the dynamic mechanical thermal analysis method. 相似文献
12.
This work outlines the development of an analytical software tool that enables the prediction of various coating properties on any given sprayable geometry. The prediction is achieved by analyzing the input computer-aided design geometry and by correlating the resulting kinematic conditions with experimental measurements. The results of the developed tool have been validated experimentally using HVOF-sprayed WC-17Co coatings. Specifically, coating thickness, microhardness, WC vol.% and specific sliding wear rate are examined and their values are predicted for the case of the external spray of a rotor-like model. 相似文献
13.
Multiscale quality assessment of Global Human Settlement Layer scenes against reference data using statistical learning 总被引:1,自引:0,他引:1
A method for quality assessment of the Global Human Settlement Layer scenes against reference data is presented. It relies on two settlement metrics; the local average and gradient functions that quantify the notions of settlement density and flexible settlement limits respectively. They are both utilized as generalization functions for increasing the level of abstraction of the sets under comparison. Generalization compensates for inaccuracies of the automatic target extraction method and can be computed at multiple scales. The comparison between the target built-up layers and the reference data employs an ordered multi-scale, linear regression computing the goodness of fit measure R2. An optimized assessment procedure is investigated in a pilot study and is further employed in a big data exercise. A newly introduced quality metric returns the agreement between automatically extracted built-up from a set of 13605 scenes and the MODIS 500 urban layer, that was found too be as high as 91% for selected sensors. A final experiment attempts a performance increase at lower scales by correlating the target layer with automatically selected training subsets. At 50 m the adjusted R2 increases by 3% with a mean squared error improvement of 2% compared to the performance achieved without statistical learning. The experiment suggests that the GHSL assessment at a global scale can be carried out based on limited high resolution reference data of minimal spatial coverage. 相似文献
14.
In this paper, we introduce a novel framework for low-level image processing and analysis. First, we process images with very simple, difference-based filter functions. Second, we fit the 2-parameter Weibull distribution to the filtered output. This maps each image to the 2D Weibull manifold. Third, we exploit the information geometry of this manifold and solve low-level image processing tasks as minimisation problems on point sets. For a proof-of-concept example, we examine the image autofocusing task. We propose appropriate cost functions together with a simple implicitly-constrained manifold optimisation algorithm and show that our framework compares very favourably against common autofocus methods from literature. In particular, our approach exhibits the best overall performance in terms of combined speed and accuracy. 相似文献
15.
Lakoumentas J Drakos J Karakantza M Sakellaropoulos G Megalooikonomou V Nikiforidis G 《Computer methods and programs in biomedicine》2012,108(1):158-167
Prognosis of B-Chronic Lymphocytic Leukemia (B-CLL) remains a challenging problem in medical research and practice. While the parameters obtained by flow cytometry analysis form the basis of the diagnosis of the disease, the question whether these parameters offer additional prognostic information still remains open. In this work, we attempt to provide computer-assisted support to the clinical experts of the field, by deploying a classification system for B-CLL multiparametric prognosis that combines various heterogeneous (clinical, laboratory and flow cytometry) parameters associated with the disease. For this purpose, we employ the na?ve-Bayes classifier and propose an algorithm that improves its performance. The algorithm discretizes the continuous classification attributes (candidate prognostic parameters) and selects the most useful subset of them to optimize the classification accuracy. Thus, in addition to the high classification accuracy achieved, the proposed approach also suggests the most informative parameters for the prognosis. The experimental results demonstrate that the inclusion of flow cytometry parameters in our system improves prognosis. 相似文献
16.
We introduce a new representation for time series, the Multiresolution Vector Quantized (MVQ) approximation, along with a distance function. Similar to Discrete Wavelet Transform, MVQ keeps both local and global information about the data. However, instead of keeping low-level time series values, it maintains high-level feature information (key subsequences), facilitating the introduction of more meaningful similarity measures. The method is fast and scales linearly with the database size and dimensionality. Contrary to previous methods, the vast majority of which use the Euclidean distance, MVQ uses a multiresolution/hierarchical distance function. In our experiments, the proposed technique consistently outperforms the other major methods. 相似文献
17.
Colin Robert Witiwat Best Thitasiri Dimitrios Mamalis Zakareya Elmo Hussein Muhammad Waqas Dipa Ray Norbert Radacsi Vasileios Koutsos 《应用聚合物科学杂志》2021,138(5):49749
The through-thickness conductivity of carbon fiber reinforced polymer (CFRP) composite was increased by incorporating multiwalled carbon nanotubes in the interlaminar region. Carbon nanotubes (CNTs) were dispersed in a polyethylenimine (PEI) binder, which was then coated onto the carbon fiber fabric. Standard vacuum-assisted resin infusion process was applied to fabricate the composite laminates. This modification technique aims to enhance the electrical conductivity in through-thickness direction for the purpose of nondestructive testing, damage detection, and electromagnetic interference shielding. CNT concentrations ranging from 0 to 0.75 wt% were used and compared to pristine CFRP samples (reference). The through-thickness conductivity of the CFRP exhibited an improvement of up to 781% by adopting this technique. However, the dispersion of CNT in PEI led to a viscosity increase and poor wetting properties which resulted in the formation of voids/defects, poor adhesion (as shown in scanning electron micrographs) and the deterioration of the mechanical properties as manifested by interlaminar shear strength and dynamic mechanical analysis measurements. 相似文献
18.
Vasileios Megalooikonomou Despina Kontos Dragoljub Pokrajac Aleksandar Lazarevic Zoran Obradovic 《Journal of Intelligent Information Systems》2008,31(3):217-242
Mining discriminative spatial patterns in image data is an emerging subject of interest in medical imaging, meteorology, engineering,
biology, and other fields. In this paper, we propose a novel approach for detecting spatial regions that are highly discriminative
among different classes of three dimensional (3D) image data. The main idea of our approach is to treat the initial 3D image
as a hyper-rectangle and search for discriminative regions by adaptively partitioning the space into progressively smaller
hyper-rectangles (sub-regions). We use statistical information about each hyper-rectangle to guide the selectivity of the
partitioning. A hyper-rectangle is partitioned only if its attribute cannot adequately discriminate among the distinct labeled
classes, and it is sufficiently large for further splitting. To evaluate the discriminative power of the attributes corresponding
to the detected regions, we performed classification experiments on artificial and real datasets. Our results show that the
proposed method outperforms major competitors, achieving 30% and 15% better classification accuracy on synthetic and real
data respectively while reducing by two orders of magnitude the number of statistical tests required by voxel-based approaches. 相似文献
19.
Matthias?Hartmann Vasileios??Pantazis Tom?Vander Aa Mladen?Berekovic Christian?Hochberger 《Journal of Signal Processing Systems》2010,60(2):225-237
Due to the increasing demands on efficiency, performance and flexibility reconfigurable computational architectures are very
promising candidates in embedded systems design. Recently coarse-grained reconfigurable array architectures (CGRAs), such
as the ADRES CGRA and its corresponding DRESC compiler are gaining more popularity due to several technological breakthroughs
in this area. We investigate the mapping of two image processing algorithms, Wavelet encoding and decoding, and TIFF compression
on this novel type of array architectures in a systematic way. The results of our experiments show that CGRAs based on ADRES
and its DRESC compiler technology deliver improved performance levels for these two benchmark applications when compared to
results obtained on a state-of-the-art commercial DSP platform, the c64x DSP from Texas Instruments. ADRES/DRESC can beat
its performance by at least 50% in cycle count and the power consumption even drops to 10% of the published numbers of the
c64x DSP. 相似文献
20.
Vasileios I. Triantafyllou Aristoula G. Karamani Konstantoula Akrida-Demertzi Panagiotis G. Demertzis 《European Food Research and Technology》2002,215(3):243-248
The need of and opportunities for recycling of plastics for food packaging have been recognized, and a lot of work to find meaningful and cost-effective solutions to this issue is in progress. The safety of recycled plastics for food contact use is largely dictated by the ability of post-consumer contaminants to absorb into recycled materials and later diffuse from recycled plastics into the food. The objective of the present study was to establish a suitable analytical approach to identifying and quantifying any chemical substances that derive from the earlier use and remain in the polyethylene terephthalate (PET). A simple gas chromatographic technique using flame ionization detection was developed to allow quantification of solvent extractable compounds in a series of recycled PET samples. Identification of the nature and extent of contaminants in the PET samples was also attempted using GC/MS analysis. 相似文献