全文获取类型
收费全文 | 43篇 |
免费 | 1篇 |
国内免费 | 2篇 |
专业分类
综合类 | 1篇 |
化学工业 | 1篇 |
机械仪表 | 3篇 |
建筑科学 | 2篇 |
轻工业 | 31篇 |
石油天然气 | 1篇 |
无线电 | 1篇 |
一般工业技术 | 3篇 |
自动化技术 | 3篇 |
出版年
2023年 | 1篇 |
2019年 | 1篇 |
2013年 | 1篇 |
2012年 | 3篇 |
2011年 | 1篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2005年 | 1篇 |
2004年 | 3篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1990年 | 1篇 |
1987年 | 2篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1975年 | 1篇 |
1970年 | 1篇 |
1968年 | 1篇 |
1966年 | 3篇 |
1960年 | 1篇 |
排序方式: 共有46条查询结果,搜索用时 15 毫秒
1.
We propose a new multipurpose audio watermarking scheme in which two complementary watermarks are used.For audio copyright protection,the watermark data with copyright information or signature are first encrypted by Arnold transformation.Then the watermark data are inserted in the low frequency largest significant discrete cosine transform(DCT) coefficients to obtain robustness performance.For audio authentication,a chaotic signal is inserted in the high frequency insignificant DCT coefficients to detect tampered regions.Furthermore,the synchronization code is embedded in the audio statistical characteristics to resist desynchronization attacks.Experimental results show that our proposed method can not only obtain satisfactory detection and tampered location,but also achieve imperceptibility and robustness to common signal processing attacks,such as cropping,shifting,and time scale modification(TSM).Comparison results show that our method outperforms some existing methods. 相似文献
2.
3.
Information filtering is an intelligent function that selects the relevant messages and items of use or interest to the user from a large amount of incoming information. This function has become very important for the rapid development of network technology. This article focuses on information filtering for the management of emergency situations. We believe that special purpose-built "information filtering systems" should be developed to cope with the problem of information overload in emergency management. In this article, we first investigated features of information in emergent situations and then proposed an information filtering system for emergency management. The proposed system is composed of two parts: causal analysis and information classification. A prototype system has been developed and its effectiveness was evaluated by experiments. 相似文献
4.
5.
6.
KI SOON RHEE 《Journal of food science》1984,49(4):1224-1225
This study indicates that defatted glandless cottonseed flour (GCF) 01 sunflower seed protein isolate (SI) incorporated in the batter/breading system can impart their antioxidant effect to the meat of fried beef patties. Coarsely ground lean beef patties were coated consecutively with dry ingredient (wheat flour for control and 1:1 mixture of wheat flour-GCF or wheat flour-SI for experimental samples), batter made of 1 part of dry ingredient and 2 parts of water, and finally dry ingredient. Ground beef and dry ingredients each contained 1% salt. Use of GCF or SI in the coating mixes greatly reduced the thiobarbituric acid values of the meat when the coated patties were fried and stored at 4°C for 5 days. 相似文献
7.
MIE SOON LEE-KIM EUN SUN HWANG KYUNG HYUN KIM 《Journal of Food Processing and Preservation》1997,21(6):485-494
The inhibitory effect of 4-hexylresorcinol (HR), ascorbic acid (AA), citric acid (CA), and bisulfites on polyphenol oxidase (PPO) of burdock roots was studied. HR was an effective inhibitor at low concentrations used in this study for crude PPO from root slices. A binary mixture of HR and AA at 1.0% concentration for 5 min achieved more than 90% inhibition of crude PPO. AA also showed high antibrowning activity for the purified PPO comparable to that of bisulfites, whereas its activity was much lower than that of HR in the crude extract. The inhibitory effect of the combined use of inhibitors was overall in the decreasing order of HR+AA, HR+CA and AA+CA, irrespective of the crude PPO or the purified PPO from burdock slices. 相似文献
8.
Mix design procedure for recycled aggregate concrete 总被引:12,自引:0,他引:12
N. K. Bairagi BCE ME Ph.D. MIE H. S. Vidyadhara B.E. M. Tech Kishore Ravande B.E. M.E. 《Construction and Building Materials》1990,4(4):188-193
Conservation of natural resources and preservation of environment is the essence of any development. Use of recycled aggregate concrete (RAC) is one such attempt and is an answer to some of the problems in constructional engineering. The concept of using RAC is now gaining popularity and research in this direction has gained momentum. In this paper, the authors have identified the most suitable method of mix design for RAC, from amongst the available conventional methods of mix design. An influencing parameter is identified and an empirical relation is suggested to modify the influencing parameter. Mix design parameters thus obtained, enable RAC to attain the desired and designed target strength without attempting any trial mixes. The suggested modified procedure, however, demands 10% more cement which is considered quite reasonable and acceptable in view of the inferior quality of recycled aggregate. 相似文献
9.
P. H. JONES BASc MS PhD FIE CPEng S. HERAT BSc MEngSc CEng MICE MIE 《Water and Environment Journal》1994,8(2):165-170
The use of cement kilns for managing solid and hazardous wastes is facilitated by the high temperature, long gas retention periods, natural alkaline environment, minimum amount of waste produced and high thermal capacity. The main benefits include energy recovery, conservation of fossil fuels, reduction in cement production costs and the use of already existing facilities.
The test burns conducted in cement kilns worldwide have demonstrated very high destruction efficiencies for most stable organic compounds, with toxic contaminants barely above the background levels.
There are several cement plants in the US and Europe presently using solid and hazardous wastes as supplementary fuel. The application of this technology in Australia has been ignored in the past. An international conference (Kilnburn'92) on the role of cement kilns in waste management was held recently in Australia and has enhanced the implementation of this technology in Australia. 相似文献
The test burns conducted in cement kilns worldwide have demonstrated very high destruction efficiencies for most stable organic compounds, with toxic contaminants barely above the background levels.
There are several cement plants in the US and Europe presently using solid and hazardous wastes as supplementary fuel. The application of this technology in Australia has been ignored in the past. An international conference (Kilnburn'92) on the role of cement kilns in waste management was held recently in Australia and has enhanced the implementation of this technology in Australia. 相似文献
10.
We propose a new multipurpose audio watermarking scheme in which two complementary watermarks are used.Foraudio copyright protection,the watermark data with copyright information or signature are first... 相似文献