Tài liệu Báo cáo " Determination of the annual beta dose by meaming beta activity using the liquid scintillation technique " ppt

... VNU Journal of Science, Mathematics - Physics 24 (2008) 36-41 36 Determination of the annual beta dose by meaming beta activity using the liquid scintillation technique Nguyen Quang ... 1. the measurement of the gamma dose rate using the radiometer CΡΠ-68-01. This paper presents a new method to evaluate the annual beta dose (Dβ )by measuring the gross beta activity using the ... measuring the gross alpha /beta radioactivity of ancient pottery by using the liquid scintillation technique, Tri - carb2770TR/SL in the alpha /beta discrimination counting mode. The beta radioactivity...

Tài liệu BÁO CÁO " DETERMINATION OF THE DIGESTIBILITY OF SOME PLANT INGREDIENTS FOR GRASS CARP (Ctenopharyngodon idella) " pdf

... The ADC of dry matter, nutrients in the tested ingredient were calculated according to the following formulae: ADC of DM of test ingredient (%) = (ADC of DM of the test diet - 0.7 x ADC of ... 6.25) by the Kjeldhal method after acid digestion, crude lipid by the Soxhlet method. The determination of chromium III (trivalent) that involves digestion of organic matter, solubilisation of ... with the value of 35.8%, so two times less than the result of our study for grass carp. This big difference of the digestibility can be explained by the interspecific variation and by a variation...

Tài liệu Báo cáo khoa học: "A Method for Correcting Errors in Speech Recognition Using the Statistical Features of Character Co-occurrence" pptx

... change in the evaluated level by the original number of erroneous characters 2 Table 4-3 The rate of change in the evaluated level by the original number of erroneous characters involved in the ... Preparation of Error-Patterns: As the threshold value for the frequency of the occurrence, we employed a value of not less than 2, therefore we obtained 629 Error-Pattems using the 4321 results of ... caused by the misdetection of errors in the SSC procedure. The remaining case occurred in the EPC procedure. The Error-Pattern used in this case could not be excluded by the condition of non-side...

Tài liệu Báo cáo khoa học: "Reﬁned Lexicon Models for Statistical Machine Translation using a Maximum Entropy Approach" pptx

... context.label-1: is the source word of the alignedword pair or the word class of the source word ( ).label-2: is one word of the aligned word pairor the word class to which these wordsbelong ( ). Using ... iscomposed by three items: The source word aligned to . The context in which the aligned pairappears. The number of occurrences of the event in the training corpus.Table 1 shows some examples of training ... “which”, in the ﬁrst example the German word “die”, the word “das” in the second and the word “was” in the third. The considered English and German contexts are separated by the double bar “ ” .The last...

Tài liệu Báo cáo " Flora of the Research Forest in Yen Tu, Quang Ninh " docx

... On the other hand, there are not publish in here. Therefore, new report should be prepared for the conservation of plant species.* The Research Area is located within the borders of the ... herbarium techniques. Subsequently, the Flora of Vietnam [1-4] and the other related floras [5-9] and monographs [10-12] were used in the identification of the specimens. Moreover, some of the ... not listed one of the 10 largest in Vietnam as a whole. It could be explained by differences in the habitats of the study area. The other position in the lists is occupied by Rubiaceae, Lauraceae,...

Tài liệu Báo cáo "Effect of the preparation conditions on the properties of Fe-Pt nanoparticles produced by sonoelectrodeposition " pptx

... J because of the presence of the Fe3Pt. Of cause, the kink in the magnetic curves was more evident in the samples with high Fe content. In another series of samples, we fixed the current ... Pt peaks in the as-prepared samples are broad due to the small size of the particles. Using the Scherrer formula with the full width at half maximum of the strongest peak (111), the mean particle ... shown). The saturation magnetization of the unannealed particles was about few emu/g and the coercivity was 20 – 80 Oe. The low value of Ms of the as-prepared nanoparticles may be explained by the...

Tài liệu Báo cáo " Survey of WO3 thin film structure built on ito/glass substrates by the Raman and xrd spectroscopies" doc

... and because of the heteroepitaxial growth of films WO3 in which the parameters of plane ITO (440) are slightly larger than the ones of WO3 planes. The relation between shifts of XRD peaks ... 35 nm. Moreover the annealing process and the breakage of the double bonds W = O also result in the limit of the shift to the 680 cm-1. Thus, in the films WO3/ITO 300 nm nanocrystal phase ... goes for the o-WO3 phases. In that case, the vibrational frequencies of m-WO3 are quite higher than these of o-WO3. And the reason is that parameters of crystalline structure of m-WO3...

Tài liệu Báo cáo " STABILITY OF THE ELASTOPLASTIC THIN ROUND CYLINDRICAL SHELLS SUBJECTED TO TORSIONAL MOMENT AT TWO EXTREMITIES " pptx

... in the paper [6]. By the smallelastoplastic deformation theory and by the ﬂow theory, this problem again has beenstudied in [2] and [4]. Basing on the theory of elastoplastic p rocesses the ... mentionedproblem has been solved by approach simulation of instability form of the cylinder (see[1],[5]). In this paper, the solution of problem in the real bending form of structure hasbeen found. ... φ≡ φ(s).Typeset by AMS-TEX24Stability of the elastoplastic thin round cylindrical shells subjected to 25 The arc-length of the strain trajectory is calculated by the formuladsdt=2√3|...

Tài liệu Báo cáo " Mechanism of forming the Dien Bien basin " pdf

... analyzed the data about the Dien Bien - Lai Chau fault zone activities, the geological structure of the basin, as well as the theory of basin-forming regime to figure out the mechanism of formation ... to the electronic and seismological cross-sections, there is a shattered zone developed along the long axis of the basin. The rock of the east side has been broken much more than that of the ... development of this basin. 2. Activity of the Dien Bien – Lai Chau fault zone in Neotectonic time During Neotectonics, the geological structure of the Northwest region of Vietnam is controlled by...

Tài liệu Báo cáo " Evaluation of ASTER Data Use in Land Use Study in the Mekong delta " pptx

... different types of land cover. These combinations will be used for the classification for the land cover types for which the combination is the most discriminative. Due to the constraints of the spatial ... A series of 8 scenes of ASTER of 2002 are used for this analysis. This is done in the framework of the collaboration between the Centre for Remote Sensing and Geomatics (VTGEO), the Forest ... resolution even of 15m are still limited for the detailed land use mapping of the studied area. Instead of this, ASTER data provide a wide range of spectra and we assume that there exist some...

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