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1.
Modelling spatio-temporal environmental data 总被引:1,自引:0,他引:1
Jussi Rasinmki 《Environmental Modelling & Software》2003,18(10):877-Technology
A conceptual model for environmental data is presented with special emphasis on the ability to store spatio-temporal references of the data. Other aspects of the model are the ability to handle hierarchical data and semantics of the measurements. The model was tested with an implementation on an object-relational database management system. As a part of the test implementation, a forestry data set covering 75 years and 4900 hectares was loaded onto the database. 相似文献
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Juha Mallat Arto Lehto Jussi Tuovinen 《Journal of Infrared, Millimeter and Terahertz Waves》1994,15(9):1497-1506
The differential phase measurement method has been improved to need the use of only one power meter instead of three power meters. This enables accurate antenna phase pattern measurements with a simplified set-up, accompanied by the reduction in cost. All advantages of the differential phase measurement method are still also available, e.g. there is no need to phase lock oscillators or to use rotary joints. The measurement results for an antenna at 110 GHz are presented. A good agreement with earlier data was obtained. 相似文献
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Marja Riekkola-Vanhanen Ph.Lic. Seppo Heimala D.Sc. Carita A. Sivelä M.Sc. Felipe Viguera M.Sc. Irma Varjola M.Sc. Seppo I. Niemelä Ph.D. Olli H. Tuovinen Ph.D. 《JOM Journal of the Minerals, Metals and Materials Society》1993,45(12):51-53
The oxidation of an auriferous pyrite ore sample was evaluated in biological leaching experiments for subsequent gold recovery via cyanidation. In batch cultures, organisms derived from the mine site oxidized pyrite and ferrous iron at pH values as low as pH 0.6. The recovery of gold was variable in shake flask experiments. In stirred tank bioreactor leaching, gold recovery was proportional to the extent of iron dissolution by bioleaching. The leaching of arsenic from the sample was also directly proportional to iron dissolution. 相似文献
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An updated parametric robust empirical Bayes (PREB) estimation methodology is presented as an alternative to several two-stage Bayesian methods used to assimilate failure data from multiple units or plants. PREB is based on prior-moment matching and avoids multi-dimensional numerical integrations. The PREB method is presented for failure-truncated and time-truncated data. Erlangian and Poisson likelihoods with gamma prior are used for failure rate estimation, and Binomial data with beta prior are used for failure probability per demand estimation. Combined models and assessment uncertainties are accounted for. One objective is to compare several methods with numerical examples and show that PREB works as well if not better than the alternative more complex methods, especially in demanding problems of small samples, identical data and zero failures. False claims and misconceptions are straightened out, and practical applications in risk studies are presented. 相似文献
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Maria Carmen Collado Jussi Meriluoto Seppo Salminen 《European Food Research and Technology》2008,226(5):1065-1073
Autoaggregation has been correlated with adhesion, which is known to be a prerequisite for colonization and infection of the
gastrointestinal tract by many pathogens. The coaggregation properties of probiotic strains with pathogens as well as their
ability to displace pathogens are of importance for therapeutic manipulation of the aberrant intestinal microbiota. Consequently,
the ability to aggregate and coaggregate are desirable properties for probiotics in health-promoting foods. Aggregation assays
and bacterial adhesion to hydrocarbons (BATH test) demonstrated significant differences in cell surface properties among the
tested commercial probiotic strains. Hydrophobicity increased when the cells were heat-inactivated. All probiotic strains
tested showed aggregation abilities with the pathogen strains tested, but the results were strain-specific and dependent on
time and incubation conditions. Our results indicate that the ability to autoaggregate, together with cell-surface hydrophobicity
and coaggregation abilities with pathogen strains can be used for preliminary screening in order to identify potentially probiotic
bacteria suitable for human or animal use. 相似文献
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The problem of finding a feasible and technically simple tele-existence system for teleoperation of heavy work vehicles is considered with the aid of two experimental test series. Several test persons of different ages and experience were used in experiments in which a basic audio/video tele-existence system with head-tracking was modified into different versions and tested. Conclusions indicate that details of the tasks and work environment have an important role in finding the optimal solution. 相似文献