全文获取类型
收费全文 | 127篇 |
免费 | 14篇 |
专业分类
化学工业 | 60篇 |
金属工艺 | 1篇 |
建筑科学 | 4篇 |
能源动力 | 8篇 |
轻工业 | 33篇 |
无线电 | 5篇 |
一般工业技术 | 15篇 |
冶金工业 | 9篇 |
自动化技术 | 6篇 |
出版年
2022年 | 11篇 |
2021年 | 6篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2018年 | 2篇 |
2017年 | 5篇 |
2016年 | 7篇 |
2015年 | 3篇 |
2014年 | 7篇 |
2013年 | 9篇 |
2012年 | 10篇 |
2011年 | 11篇 |
2010年 | 3篇 |
2009年 | 6篇 |
2008年 | 4篇 |
2007年 | 14篇 |
2006年 | 1篇 |
2005年 | 4篇 |
2004年 | 5篇 |
2003年 | 6篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1997年 | 1篇 |
1996年 | 4篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有141条查询结果,搜索用时 15 毫秒
131.
Unified Compression Model for Venice Lagoon Natural Silts 总被引:1,自引:0,他引:1
Giovanna Biscontin Simonetta Cola Juan M. Pestana Paolo Simonini 《Canadian Metallurgical Quarterly》2007,133(8):932-942
Over the last 50 years, the city of Venice, Italy, has observed a significant increase in the frequency of flooding. Numerous engineering solutions have been proposed, including the use of movable gates located at the three lagoon inlets. A key element in the prediction of performance is the estimation of settlements of the foundation system of the gates. The soils of Venice Lagoon are characterized by very erratic depositional patterns of clayey silts, resulting in an extremely heterogeneous stratigraphy with discontinuous layering. The soils are also characterized by varying contents of coarse and fine-grained particles. In contrast, the mineralogical composition of these deposits is quite uniform, which allows us to separate the influence of mineralogy from that of grain size distribution. A comprehensive geotechnical testing program was performed to assess the one-dimensional compression of Venice soils and examine the factors affecting the response in the transition from one material type to another. The compressibility of these natural silty clayey soils can be described by a single set of constitutive laws incorporating the relative fraction of granular to cohesive material. 相似文献
132.
Marco Brogioni Simone Pettinato Giovanni Macelloni Simonetta Paloscia Paolo Pampaloni Nazzareno Pierdicca 《International journal of remote sensing》2013,34(15):4227-4255
The sensitivity of bistatic scattering coefficient σ° to soil moisture content (SMC) and surface roughness was investigated by means of model simulations of the incoherent scattered fields performed with the advanced integral equation model (AIEM) and the second order small perturbation model (SPM). The study was performed by simulating scattering on the whole upper half space, for different values of incident angles. The achieved results, represented as maps of σ° as a function of azimuth and zenith angles, were evaluated by means of a quality index which takes into consideration the effect of roughness on SMC measurement. The sensitivity analysis has pointed out that for measuring SMC a bistatic observation, by itself or combined with the monostatic one, can make appreciable improvements with respect to classical monostatic radar. Appendix A contains the AIEM formulas corrected for several typographical errors present in the specific literature. 相似文献
133.
Simonetta Maccioni Rosa Baldini Marianna Tebano Pier Luigi Cioni Guido Flamini 《Food chemistry》2007,104(4):1393-1395
The essential oil of the flowering aerial parts of Teucrium scorodonia L. ssp. scorodonia growing in Italy on Verrucano, was analyzed by GC and GC–MS. All the identified compounds were sesquiterpene hydrocarbons. The main ones were germacrene B (26.2%) and β-caryophyllene (25.2%). 相似文献
134.
Purification of two bacteriocins produced by Enterococcus faecalis DBFIQ E24 strain isolated from raw bovine milk
下载免费PDF全文
![点击此处可从《International Journal of Dairy Technology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Ricardo M. Manzo María de las Mercedes Cardoso Georgina G. Tonarelli Arturo C. Simonetta 《International Journal of Dairy Technology》2016,69(2):282-293
Enterococcus faecalis DBFIQ E24 was formerly characterised as a producer of antibacterial and antifungal substances. This strain is vancomycin sensitive, nonhaemolytic and gelatinase negative. SDS‐PAGE revealed the presence of an active band located between 1060 and 3500 Da. After the application of a three‐step purification procedure, two antimicrobial peptides were isolated. One of them is mostly active against Bacillus cereus with a molecular mass of 1364 Da, and the other one with a molecular mass of 1686 Da is mainly active against Escherichia coli. These results confirm the technological potential of E. faecalis DBFIQ E24 strain as a GRAS food biopreservative. 相似文献
135.
The CNDO/2 Molecular Orbital method has been used to investigate the energetically favoured path in the dimerization of methylene in the singlet state. 相似文献
136.
Compensation of the inherent wave front curvature in digital holographic coherent microscopy for quantitative phase-contrast imaging 总被引:1,自引:0,他引:1
Ferraro P De Nicola S Finizio A Coppola G Grilli S Magro C Pierattini G 《Applied optics》2003,42(11):1938-1946
An approach is proposed for removing the wavefront curvature introduced by the microscope imaging objective in digital holography, which otherwise hinders the phase contrast imaging at reconstruction planes. The unwanted curvature is compensated by evaluating a correcting wave front at the hologram plane with no need for knowledge of the optial parameters, focal length of the imaging lens, or distances in the setup. Most importantly it is shown that a correction effect can be obtained at all reconstruction planes. Three different methods have been applied to evaluate the correction wave front and the methods are discussed in detail. The proposed approach is demonstrated by applying digital holography as a method of coherent microscopy for imaging amplitude and phase contrast of microstructures. 相似文献
137.
R Bianchi G M Hanozet A Seneci M P Simonetta 《Computer methods and programs in biomedicine》1988,27(2):189-196
The computer program MIR previously described (R. Bianchi, G.M. Hanozet and M. Pilone Simonetta, Comput. Prog. Biomed. 16 (1983) 189) that fits trial rate laws to enzyme and transport steady-state kinetic data by the least-squares method has been enhanced. The new version MIR II is an interactive program and it consists of five major routines and a larger number of smaller program elements to perform the linear (three different functional forms) and non-linear (eleven mathematical models) regression analysis of kinetic data from enzyme and transmembrane transport experiments, also in the presence of inhibitors. Other features of the new program include a set of statistics and tests useful for the model building process, for the development of the mathematical model and for its validation and maintenance. An algorithm for fitting a straight line taking into account errors in both x and y is also provided. 相似文献
138.
The bluefin tuna, Thunnus thynnus (Linnaeus 1758), is biologically and economically important in the Atlantic--Mediterranean ecosystems. Bluefin tuna feed on diverse food items depending on their age, thus they occupy different trophic levels during their lifespan. Hexachlorobenzene (HCB), p,p'-DDE and polychlorinated biphenyls (PCBs) are well-known persistent organic pollutants (POPs) in the Mediterranean basin. The relationship between stable isotopes of nitrogen (N) and the POP residue levels in tissues has recently increased knowledge on the link between the trophic levels and the contaminant accumulation. Trophic levels were estimated by using 15N/14N ratio (delta15N) and HCB, p,p'-DDE, and forty-three PCBs were quantified in bluefin tuna from the southern Tyrrhenian Sea. Results showed that changes in PCB and p,p'-DDE concentrations were a function of size and trophic level, while no correlations were observed for HCB. Apart from HCB and PCB nos. 101, 207, 95, 158, and 60 + 56, which did not show any significant increase per trophic level, the other PCBs and the p,p'-DDE increased significantly. The ontogenetic magnification factor of PCBs was 6.6 +/- 0.5, which was significantly (12 times) higher (p < 0.05) than the values found for p,p'-DDE (1.4) and HCB (1.4). 相似文献
139.
Dalla Santa Giorgia Cola Simonetta Tateo Fabio Galgaro Antonio 《Bulletin of Engineering Geology and the Environment》2020,79(6):2893-2905
Bulletin of Engineering Geology and the Environment - In landfills, due to their low hydraulic conductivity, compacted clays (CC) are commonly used in multilayered structures as base liners and... 相似文献
140.
Orazio Attanasi Simonetta Gasperoni Claudio Carletti 《Advanced Synthesis \u0026amp; Catalysis》1980,322(6):1063-1066