全文获取类型
收费全文 | 2235篇 |
免费 | 154篇 |
国内免费 | 17篇 |
专业分类
电工技术 | 23篇 |
综合类 | 3篇 |
化学工业 | 799篇 |
金属工艺 | 59篇 |
机械仪表 | 58篇 |
建筑科学 | 65篇 |
矿业工程 | 1篇 |
能源动力 | 148篇 |
轻工业 | 247篇 |
水利工程 | 20篇 |
石油天然气 | 23篇 |
无线电 | 312篇 |
一般工业技术 | 319篇 |
冶金工业 | 85篇 |
原子能技术 | 18篇 |
自动化技术 | 226篇 |
出版年
2024年 | 6篇 |
2023年 | 19篇 |
2022年 | 58篇 |
2021年 | 99篇 |
2020年 | 74篇 |
2019年 | 89篇 |
2018年 | 109篇 |
2017年 | 101篇 |
2016年 | 111篇 |
2015年 | 89篇 |
2014年 | 117篇 |
2013年 | 227篇 |
2012年 | 135篇 |
2011年 | 120篇 |
2010年 | 97篇 |
2009年 | 116篇 |
2008年 | 87篇 |
2007年 | 65篇 |
2006年 | 70篇 |
2005年 | 31篇 |
2004年 | 54篇 |
2003年 | 32篇 |
2002年 | 37篇 |
2001年 | 41篇 |
2000年 | 37篇 |
1999年 | 35篇 |
1998年 | 40篇 |
1997年 | 40篇 |
1996年 | 27篇 |
1995年 | 24篇 |
1994年 | 12篇 |
1993年 | 11篇 |
1992年 | 21篇 |
1991年 | 13篇 |
1990年 | 9篇 |
1989年 | 8篇 |
1988年 | 10篇 |
1987年 | 9篇 |
1986年 | 9篇 |
1985年 | 15篇 |
1984年 | 9篇 |
1983年 | 12篇 |
1982年 | 6篇 |
1981年 | 9篇 |
1980年 | 14篇 |
1979年 | 7篇 |
1976年 | 12篇 |
1974年 | 4篇 |
1973年 | 5篇 |
1972年 | 7篇 |
排序方式: 共有2406条查询结果,搜索用时 218 毫秒
41.
Ismail Mohd Adnan Shahin 《International Journal of Speech Technology》2013,16(3):341-351
Speaker recognition performance in emotional talking environments is not as high as it is in neutral talking environments. This work focuses on proposing, implementing, and evaluating a new approach to enhance the performance in emotional talking environments. The new proposed approach is based on identifying the unknown speaker using both his/her gender and emotion cues. Both Hidden Markov Models (HMMs) and Suprasegmental Hidden Markov Models (SPHMMs) have been used as classifiers in this work. This approach has been tested on our collected emotional speech database which is composed of six emotions. The results of this work show that speaker identification performance based on using both gender and emotion cues is higher than that based on using gender cues only, emotion cues only, and neither gender nor emotion cues by 7.22 %, 4.45 %, and 19.56 %, respectively. This work also shows that the optimum speaker identification performance takes place when the classifiers are completely biased towards suprasegmental models and no impact of acoustic models in the emotional talking environments. The achieved average speaker identification performance based on the new proposed approach falls within 2.35 % of that obtained in subjective evaluation by human judges. 相似文献
42.
Cloud computing has emerged as one of the most highly discussed topics both in the academic community and in the computing industry. While most of the work that has been conducted to explore this field focuses either on establishing the basis for cloud computing or almost exclusively on the issues surrounding security and data privacy, this paper takes the first exploratory step into exploring the actual internal working of cloud computing and demonstrates its viability for organizations, more specifically educational establishments . The paper starts by introducing the most important key clouds computing concepts, including virtualization technologies, Web services and Service Oriented Architectures (SOA), and distributed computing. Light will be then shed on the impact and potential benefits of cloud computing on teaching and learning in educational institutions. The paper closes by describing building a private cloud inside educational institution and highlights its offerings for students, staff and lecturers. 相似文献
43.
Although fuzzy-filtered neural networks (FFNN) have been used in pattern classification because of their unique characteristics in feature extraction, they usually have poor performance in forecasting applications due to their structure complexities especially in their consequent reasoning part. In this paper, an enhanced FFNN, EFFNN, is proposed for time series forecasting and material fatigue prognosis. A novel neural network scheme is developed to facilitate computation implementation. A new conjugate technique is proposed to improve training efficiency. The effectiveness of the developed EFFNN scheme and the related training technique is demonstrated by a series of simulation tests. The EFFNN is also implemented for material fatigue prognosis. Test results show that the developed EFFNN predictor is an effective forecasting tool; it can capture system dynamics effectively and track system characteristics accurately. 相似文献
44.
Anwar Syed Muhammad Irmakci Ismail Torigian Drew A. Jambawalikar Sachin Papadakis Georgios Z. Akgun Can Ellermann Jutta Akcakaya Mehmet Bagci Ulas 《Journal of Signal Processing Systems》2022,94(5):497-510
Journal of Signal Processing Systems - Segmentation of thigh tissues (muscle, fat, inter-muscular adipose tissue (IMAT), bone, and bone marrow) from magnetic resonance imaging (MRI) scans is useful... 相似文献
45.
Engineering with Computers - The study is investigated the capacity of new artificial intelligence (AI) methodologies for shear strength (Vs) computation of reinforced concrete (RC) beams. The... 相似文献
46.
Hassan Md Rafiul Ismail Walaa N Chowdhury Ahmad Hossain Sharara Huda Shamsul Hassan Mohammad Mehedi 《The Journal of supercomputing》2022,78(7):10250-10274
The Journal of Supercomputing - This paper designs and develops a computational intelligence-based framework using convolutional neural network (CNN) and genetic algorithm (GA) to detect COVID-19... 相似文献
47.
Ismail Ababneh Saad Bani-Mohammad Mohamed Ould-Khaoua 《The Journal of supercomputing》2010,53(1):5-25
Allocating submeshes to jobs in mesh-connected multicomputers in an FCFS fashion leads to poor system performance because
a large job at the head of the waiting queue can prevent the allocation of free submeshes to other smaller waiting jobs. However,
serving jobs aggressively out-of-order can lead to excessive waiting delays for large jobs located at the head of the waiting
queue. In this paper, we show that the ability of the job scheduling algorithm to bypass the head of the waiting queue should
increase with the load, and we propose a scheduling scheme that can bypass the waiting queue head in a load-dependent adaptive
fashion. Also, giving priority to large jobs because they are more difficult to accommodate is investigated. The performance
of the proposed scheme has been compared to that of FCFS, aggressive out-of-order scheduling, and other previous job scheduling
schemes. Extensive simulation results based on synthetic workloads and real workload traces indicate that our scheduling strategy
is a good strategy when both average and maximum job waiting delays are considered. In particular, it is substantially superior
to FCFS in terms of mean turnaround times, and to aggressive out-of-order scheduling in terms of maximum waiting delays. 相似文献
48.
Ismail Sila 《欧洲信息系统杂志》2010,19(5):581-600
We developed a model of the relationships among several organisational, interorganisational and technological factors, the adoption of Internet-based interorganisational systems (IBIS) and various measures of firm performance. We used structural equation modelling to empirically test these relationships. The findings showed that adopting IBIS indirectly improves the operational performance of firms through business process performance. The positive effect on financial performance of adopting IBIS is not direct, but through the mediating effects of operational performance and business process performance. We also utilised multiple group analysis to test some of the model relationships across firms using several organisational and environmental factors as moderators. The organisational factors tested are firm type, age and ownership type. The environmental factors consisted of dynamism, complexity and hostility. We found that the organisational factors are significant moderators and that complexity and hostility are not significant moderators. However, the effects of dynamism as a moderator are less clear. 相似文献
49.
50.
Joan Goh Ahmad Abd. MajidAhmad Izani Md. Ismail 《Computers & Mathematics with Applications》2011,62(12):4492-4498
In the present paper, the cubic B-splines method is considered for solving one-dimensional heat and wave equations. A typical finite difference approach had been used to discretize the time derivative while the cubic B-spline is applied as an interpolation function in the space dimension. The accuracy of the method for both equations is discussed. The efficiency of the method is illustrated by some test problems. The numerical results are found to be in good agreement with the exact solution. 相似文献