全文获取类型
收费全文 | 343篇 |
免费 | 21篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 65篇 |
金属工艺 | 2篇 |
机械仪表 | 2篇 |
建筑科学 | 5篇 |
能源动力 | 9篇 |
轻工业 | 14篇 |
石油天然气 | 2篇 |
无线电 | 47篇 |
一般工业技术 | 73篇 |
冶金工业 | 14篇 |
原子能技术 | 10篇 |
自动化技术 | 122篇 |
出版年
2022年 | 16篇 |
2021年 | 11篇 |
2020年 | 6篇 |
2019年 | 6篇 |
2018年 | 9篇 |
2017年 | 13篇 |
2016年 | 14篇 |
2015年 | 13篇 |
2014年 | 4篇 |
2013年 | 13篇 |
2012年 | 13篇 |
2011年 | 31篇 |
2010年 | 24篇 |
2009年 | 18篇 |
2008年 | 23篇 |
2007年 | 18篇 |
2006年 | 18篇 |
2005年 | 9篇 |
2004年 | 9篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 2篇 |
2000年 | 6篇 |
1999年 | 3篇 |
1998年 | 6篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1981年 | 3篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有366条查询结果,搜索用时 15 毫秒
31.
Adi Abileah 《Journal of the Society for Information Display》2007,15(6):337-347
Abstract— As the healthcare system changes and progresses, the need for different types of high‐performing displays is also evolving. There are three categories of displays: (a) embedded (as part of life saving devices), (b) informative (for patient data and history, and managing workflow), and (c) imaging (high performing for diagnosis). The challenges of AMLCDs, which are the display of choice at the moment mainly in digital imaging, will be discussed. These challenges include very high resolution, high brightness, and wide viewing angle. The current performance of AMLCDs and the areas which they need to improve will be reviewed. A brief summary of the standards used to specify medical (diagnostic) displays will follow. A look into the future will predict the role of displays in hospitals. 相似文献
32.
33.
Graphene: Modular Graphene‐Based 3D Covalent Networks: Functional Architectures for Energy Applications (Small 8/2016)
下载免费PDF全文
![点击此处可从《Small (Weinheim an der Bergstrasse, Germany)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
34.
We investigate the relations between two major properties of multiparty protocols: fault tolerance (or resilience ) and randomness . Fault-tolerance is measured in terms of the maximum number of colluding faulty parties, t , that a protocol can withstand and still maintain the privacy of the inputs and the correctness of the outputs (of the honest
parties). Randomness is measured in terms of the total number of random bits needed by the parties in order to execute the
protocol.
Previously, the upper bound on the amount of randomness required by general constructions for securely computing any nontrivial
function f was polynomial both in n , the total number of parties, and the circuit-size C(f) . This was the state of knowledge even for the special case t=1 (i.e., when there is at most one faulty party). In this paper we show that for any linear-size circuit, and for any number
t < n/3 of faulty
Received 30 April 1998 and revised 3 January 1999 and 1 July 1999 相似文献
35.
Sorption of the pharmaceuticals carbamazepine and naproxen to dissolved organic matter: Role of structural fractions 总被引:3,自引:0,他引:3
Adi Maoz 《Water research》2010,44(3):981-4482
Pharmaceutical compounds and dissolved organic matter (DOM) are co-introduced into the environment by irrigation with reclaimed wastewater and/or application of biosolids. In this study, we evaluate the role and mechanism of interaction of the pharmaceuticals naproxen and carbamazepine with structural fractions of biosolids-derived DOM. Sorption interactions were estimated from dialysis-bag experiments at different pHs.Sorption of naproxen and carbamazepine by the hydrophobic acid fraction exhibited strong pH-dependence. With both pharmaceuticals, the highest sorption coefficients (KDOC) were at pH 4. With the hydrophobic neutral fraction, pH affected only naproxen sorption (decreasing with increasing pH). Among the hydrophilic DOM fractions, the hydrophilic acid fraction exhibited the highest KDOC value for carbamazepine, probably due to their bipolar character. In the hydrophilic acid fraction-naproxen system, significant anionic repulsion was observed with increasing pH. The hydrophilic base fraction contains positively charged functional groups. Therefore with increasing ionization of naproxen (with increasing pH), KDOC to this fraction increased. The hydrophilic neutral fraction exhibited the lowest KDOC with both studied pharmaceuticals.The KDOC value of carbamazepine with the bulk DOM sample was higher than the calculated KDOC value based on sorption by the individual isolated fractions. The opposite trend was observed with naproxen at pH 8: the calculated KDOC value was higher than the value obtained for the bulk DOM. These results demonstrate that DOM fractions interact with each other and do not act as separate sorption domains. 相似文献
36.
Ahmad Ivan Karayan Adi Hersuni Dian Adisty Ardiyansyah Yatim 《Journal of Failure Analysis and Prevention》2011,11(5):481-486
A seawater inlet pipe failed in service. The visual examination showed that the backing bar was present inside the pipe and
the failure was characterized by leaks at approximately 4–8 o’clock position near that backing bar. The finite element analysis
of fluid in the seawater inlet pipe showed that the eddy zone was formed near the backing bar. The leaks and crater-like surfaces
were noticed on the inner pipe surface at which the finite element analysis modeled the possibility of the formation of eddy
zone. 相似文献
37.
Wu Xiao Rui-jie Zhou Hong-Guang Dong Nan Meng Chih-Yao Lin Vincentius Surya Kurnia Adi 《Korean Journal of Chemical Engineering》2009,26(5):1161-1174
A systematic holistic mathematical programming (HMP) is proposed to formulate a mixed integer nonlinear programming (MINLP)
model for one-step optimization of water-allocation and heat exchange network (WAHEN) designs with single- or multi-contaminant
water streams. The proposed model formulation and solution strategy are believed to be superior to the available ones in the
following aspects. First, a comprehensive representation combining two separate superstructures is adopted to capture the
structural characteristics of the integrated WAHEN. Then, a hybrid optimization strategy integrating stochastic and deterministic
components is developed for the resulting MINLP model and, also, an interactive iteration method is adopted based on sensitivity
analysis to guide the search toward a potential global optimum. Finally, evolutionary strategies and manipulations are executed
to enhance WAHEN configurations. Two illustrative examples are presented to demonstrate the validity and advantages of the
proposed approach. 相似文献
38.
Perceptual audio data concealment and watermarking scheme using direct frequency domain substitution 总被引:1,自引:0,他引:1
Tio C.M.M. McLoughlin I.V. Adi R.W. 《Vision, Image and Signal Processing, IEE Proceedings -》2002,149(6):335-340
A method is described for perceptually transparent data concealment and watermarking in audio. The proposed system replaces redundant and imperceptible frequency components with hidden data. A psychoacoustic model is used to identify suitable frequency locations for data hiding. Such a method is complicated by the windowing and overlapping requirements used for signal conditioning. The proposed system uses data flipping in place of windowing and incorporates a novel data detection scheme with adaptive weighting to increase the robustness of the watermark transmission. The resistance of the watermarking system to filtering, amplitude scaling and additive white noise is measured and results presented. 相似文献
39.
Piestun R. Shamir J. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2002,90(2):222-244
The possibility of synthesizing light fields satisfying given requirements within a three-dimensional (3-D) space domain was proposed and demonstrated during recent years. In this paper we present fundamental physical properties characterizing 3-D fields and propose analytical and numerical procedures to synthesize them. These methods solve the proper wave equation under 3-D constraints. Since the manipulation of light is a basic task, this is an effective approach to deal with classical as well as novel problems in optics and photonics technologies. We discuss exciting new potential areas of application and extensions of this concept 相似文献
40.
Eliezer Shamir 《土木工程与建筑:英文版》2014,(10):1317-1326
It is common to assume that structures are designed in view of 50 year life cycle as per Euro-Code 2 and other codes. In special cases, structures are designed in view of longer life cycle, such as bridges, important infrastructure facilities, important religious structures or in case of extended returning period of seismic event or floods. Beside issues of durability and maintenance aspects, this involves also the need to cover the probability of exceeding characteristic design live loads during the extended period, while keeping the same levels of the accepted risk that were assumed by the various codes, as good enough for the standard 50 year life cycle. Bearing in mind that design procedures, formulations, materials characteristic strengths and partial safety factors are used for these structures as per the existing codes, scaling of partial safety factors, or alternatively an additional "compensating" factor is required. A simplified approach and procedure to arrive at a reasonable calibration of the code safety factors based on 50 years to compensate for an extended life cycle, based upon structural reliability considerations, is proposed. 相似文献