全文获取类型
| 收费全文 | 121篇 |
| 免费 | 1篇 |
专业分类
| 化学工业 | 49篇 |
| 金属工艺 | 1篇 |
| 机械仪表 | 5篇 |
| 建筑科学 | 1篇 |
| 能源动力 | 5篇 |
| 轻工业 | 4篇 |
| 水利工程 | 1篇 |
| 石油天然气 | 1篇 |
| 无线电 | 9篇 |
| 一般工业技术 | 16篇 |
| 冶金工业 | 10篇 |
| 自动化技术 | 20篇 |
出版年
| 2024年 | 4篇 |
| 2023年 | 2篇 |
| 2022年 | 2篇 |
| 2021年 | 5篇 |
| 2020年 | 9篇 |
| 2019年 | 4篇 |
| 2018年 | 8篇 |
| 2017年 | 6篇 |
| 2016年 | 14篇 |
| 2015年 | 9篇 |
| 2014年 | 6篇 |
| 2013年 | 7篇 |
| 2012年 | 7篇 |
| 2011年 | 3篇 |
| 2010年 | 8篇 |
| 2009年 | 4篇 |
| 2008年 | 4篇 |
| 2007年 | 3篇 |
| 2006年 | 2篇 |
| 2004年 | 2篇 |
| 2001年 | 1篇 |
| 1995年 | 2篇 |
| 1994年 | 5篇 |
| 1993年 | 1篇 |
| 1991年 | 1篇 |
| 1990年 | 1篇 |
| 1989年 | 1篇 |
| 1985年 | 1篇 |
排序方式： 共有122条查询结果，搜索用时 15 毫秒
31.
In this paper, a hybrid quantum-inspired evolutionary algorithm (QIEA) is proposed to automatically design regularised ensemble extreme learning machines (EELMs). Quantum evolutionary computing is a relatively recent spot-lighted concept which takes advantage from both the evolutionary and quantum computing laws. In general, QIEAs have been proven to be really powerful for optimising complex engineering tasks. The fascinating trait of observation operator in QIEA enables us to transform the quantum bits to both the binary and continuous spaces. Here, the authors present a mix continuous/binary version of QIEA, to find out whether it is suited for designing regularised EELMs. Indeed, the design process of EELM is conducted at two different levels, i.e. hyper and low levels. At the low level, some novel criteria are presented in the form of penalty functions to enable the optimiser searching for parsimonious, compact and accurate regularised extreme learning machines, as individual components of the ensemble. At the hyper-level, the non-negative least square error optimisation technique is utilised to deterministically find the most eligible components for designing the ensemble. Through extensive numerical experiments, the authors demonstrate that the proposed method is really efficient for the automated design of EELM identifiers. 相似文献
32.
Amin Hammad Cheng Zhang Yongxin Hu & Elaheh Mozaffari 《Computer-Aided Civil and Infrastructure Engineering》2006,21(7):530-547
Abstract: This article discusses the requirements for developing a mobile model-based bridge lifecycle management system (MMBLMS). This new system should link all the information about the lifecycle stages of a bridge (e.g., design, construction, inspection, and maintenance) to a 4D model of the bridge incorporating different scales of space and time to record events throughout the lifecycle with suitable levels of details (LoDs). In addition, MMBLMS should support distributed databases and mobile location-based computing by providing user interfaces that can be used on mobile computers, such as tablet PCs. A framework for MMBLMS is described and the basic computational issues for realizing it are discussed including the navigation modes, the picking behavior and the LoDs for representing bridge elements and defects. A prototype system developed in Java language is used to demonstrate the feasibility of the proposed methodology for realizing this system. 相似文献
33.
Niusha Hekmatjoo Zahed Ahmadi Faramarz Afshar Taromi Babak Rezaee Farkhondeh Hemmati Mohammad Reza Saeb 《Polymer International》2015,64(9):1111-1120
The glycolysis process as a useful approach to recycling flexible polyurethane foam wastes is modeled in this work. To obtain high quality recycled polyol, the effects of influential processing and material parameters, i.e. process time, process temperature, catalyst‐to‐solvent (Cat/Sol) and solvent‐to‐foam (Sol/Foam) ratios, on the efficiency of the glycolysis reaction were investigated individually and simultaneously. For the continuous prediction of process behavior and interactive effects of parameters, an artificial neural network (ANN) model as an efficient statistical‐mathematical method has been developed. The results of modeling for the criteria that determine the glycolysis process efficiency including the hydroxyl value of the recycled polyol and isocyanate functional group conversion prove that the adopted ANN model successfully anticipates the recycling process responses over the whole range of experimental conditions. The Cat/Sol ratio showed the strongest influence on the quality of the recycled polyol among the studied parameters, where the minimum hydroxyl value was obtained at a medium amount of the assigned ratio. For the consumed polyurethane foam, a higher value of this ratio led to an increase in the hydroxyl value and isocyanate conversion. © 2015 Society of Chemical Industry 相似文献
34.
Ezatollah Mozaffari 《Coloration Technology》2015,131(3):213-217
Deinked pulp is made from recycled paper in an industrial process called deinking. In this process, printing ink is removed from paper fibres. This research demonstrates the deinking process and discusses factors associated with the collection of released ink particles by bubbles. Flotation is introduced as a technology for the creation of ink‐laden bubbles and for the removal of the ink‐concentrated froth. A downward concurrent column reactor has been designed, manufactured, and used in a series of two‐phase flow experiments. The objective is to measure the liquid and gas retention time to highlight the most effective features associated with bubble particle attachment/detachment. A residence time of <10 s in the downcomer and 20 s in total was found to be sufficient for the collection and recovery of ink particles. It has been concluded that concurrent column reactors are potentially efficient for removing ink from paper fibres. 相似文献
35.
36.
The study was carried out to simulate the 3D flow domain in the mixing of pseudoplastic fluids possessing yield stress with anchor impellers, using a computational fluid dynamics (CFD) package. The multiple reference frames (MRF) technique was employed to model the rotation of the impellers. The rheology of the fluid was approximated using the Herschel–Bulkley model. To validate the model, the CFD results for the power consumption were compared to the experimental data. After the flow fields were calculated, the simulations for tracer homogenization were performed to simulate the mixing time. The effects of impeller speed, fluid rheology, and impeller geometry on power consumption, mixing time, and flow pattern were explored. The optimum values of c/D (impeller clearance to tank diameter) and w/D (impeller blade width to tank diameter) ratios were determined on the basis of minimum mixing time. 相似文献
37.
Mansoureh Mozaffari Asghar Mahmoudi Kaveh Mollazade Bahareh Jamshidi 《Drying Technology》2017,35(12):1530-1542
Absorption and scattering properties of product change as moisture content is reduced, but it has not been investigated how these changes are correlated. This study was aimed to measure and test the feasibility of using optical properties in predicting the moisture content of sliced apple samples during hot air drying. In this investigation, the noninvasive backscattering laser imaging technique at three wavelengths (650, 780, and 880?nm) and Farrell’s diffusion theory were used to determine absorption and reduced scattering coefficients. Artificial neural network model was applied to correlate the optical coefficients and moisture content of samples. The highest correlation between above-mentioned parameters was found at 780?nm. The best moisture content prediction result was obtained when absorption and reduced scattering coefficients were combined at three wavelengths with Rp?=?0.984. The results suggested that this method can be effectively used to predict the moisture content and control the drying process. 相似文献
38.
Amey Apte Kosar Mozaffari Farnaz Safi Samghabadi Jordan A. Hachtel Long Chang Sandhya Susarla Juan Carlos Idrobo David C. Moore Nicholas R. Glavin Dmitri Litvinov Pradeep Sharma Anand B. Puthirath Pulickel M. Ajayan 《Advanced materials (Deerfield Beach, Fla.)》2020,32(24):2000006
Since graphene, a variety of 2D materials have been fabricated in a quest for a tantalizing combination of properties and desired physiochemical behavior. 2D materials that are piezoelectric, i.e., that allow for a facile conversion of electrical energy into mechanical and vice versa, offer applications for sensors, actuators, energy harvesting, stretchable and flexible electronics, and energy storage, among others. Unfortunately, materials must satisfy stringent symmetry requirements to be classified as piezoelectric. Here, 2D ultrathin single-crystal molybdenum oxide (MoO2) flakes that exhibit unexpected piezoelectric-like response are fabricated, as MoO2 is centrosymmetric and should not exhibit intrinsic piezoelectricity. However, it is demonstrated that the apparent piezoelectricity in 2D MoO2 emerges from an electret-like behavior induced by the trapping and stabilization of charges around defects in the material. Arguably, the material represents the first 2D electret material and suggests a route to artificially engineer piezoelectricity in 2D crystals. Specifically, it is found that the maximum out-of-plane piezoresponse is 0.56 pm V−1, which is as strong as that observed in conventional 2D piezoelectric materials. The charges are found to be highly stable at room temperature with a trapping energy barrier of ≈2 eV. 相似文献
39.
40.
Speech process has benefited a great deal from the wavelet transforms. Wavelet packets decompose signals in to broader components
using linear spectral bisecting. In this paper, mixtures of speech signals are decomposed using wavelet packets, the phase
difference between the two mixtures are investigated in wavelet domain. In our method Laplacian Mixture Model (LMM) is defined.
An Expectation Maximization (EM) algorithm is used for training of the model and calculation of model parameters which is
the mixture matrix. And then we compare estimation of mixing matrix by LMM-EM with different wavelets. And then we use adaptive
algorithm in each wavelet packet for speech separation and we see better results are obtained. Therefore individual speech
components of speech mixtures are separated. 相似文献