Báo cáo "Design dual band microstrip antenna for RFID application" potx

... impedance’s matching for single antenna which is originally designed at 900MHz. Some dual band RFID structures are discussed in this paper. Keywords: dual band antenna, RFID antenna, impedance ... Sciences and Technology 26 (2010) 276-280 276 Design dual band microstrip antenna for RFID application Tran Minh Tuan National Institute of Information and Commu...

Ngày tải lên: 22/03/2014, 09:20

... studying, designing and manufacturing a dual – band and high – bandwidth antenna applied for advance mobile handsets. This antenna can work in GSM/UMTS bands by generating two resonant modes ... reduce the size of a monopole antenna. But the resulted antenna was mainly applicable for single -band operation. To achieve dual- band operation in a compact monopole antenn...

Ngày tải lên: 05/03/2014, 11:21

... words used for lookup. The prediction for a tweet uses majority vote-based approach as for version 1. The optimal POS bi-tags have been derived experimen- tally by using top 10% features on information ... is considered for in- version. The two versions of C-Feel-It vary in their Lexicon-based Sentiment Predictor. Figure 3 shows the Lexicon-based Sentiment Predictor for version 1....

Ngày tải lên: 17/03/2014, 00:20

... C(A) is the confidence score of the align- ment A as defined in formula 1. This formula computes the sum of the alignment confidence scores for the alignments containing a ij , which is 934 Figure 3: ... by 1.5 points (from 69.3 to 70.8), 1.8 point improvement for content words and 1.0 point for function words. It also significantly outperforms the traditionally used heuristics, ”intersecti...

Ngày tải lên: 17/03/2014, 01:20

... separate dictionary entries for affixes because each affix is a model on its own. Therefore, information associated with an affix model must cover all unpredictable information listed within ... correspon- dences between the form of entries listed in the dictionary and the form they develop when they are combined in sequences of morphemes. These files are used both for analysis an...

Ngày tải lên: 18/03/2014, 02:20

... per- formance. We adopt such a measure from in- formation retrieval (Hull, 1993). For each cross- -validation data fold we define average precision (AP) as the expected value of precision for all ... indistinguishable per- formance, and visualized this information in Fig- ure 3 b). A baseline system ranking bigrams randomly operates with average precision of 20.9%. The best performing meth...

Ngày tải lên: 23/03/2014, 18:20

... no segmentation is required for English as all the mor- phemes are expressed as individual words. For this reason, English should provide a strong source of disambiguation for highly inflected languages, ... (the basic units of meaning). For example, the English word misunderstanding would be segmented into mis - understand - ing. This task is an informative testbed for our explorati...

Ngày tải lên: 31/03/2014, 00:20

... interpolation, we must also choose whether smoothing (a prereq- uisite for backoff) is performed before or after the interpolation. If we smooth before the interpolation, then the frequencies will be overly ... approach for LSA-adapted modeling, how- ever, we found this approach to be inferior to di- rect estimation of the posterior probability for word prediction (Trnka et al., 2006)....

Ngày tải lên: 31/03/2014, 00:20

... 137.26 for the Roark parser/trigram combination). In both papers the interpolation constants were 0.36 for the trigram estimate and 0.64 for the grammar estimate. While both of these reasons for ... results for the immediate- bihead model 4. all words except for the 10,000 most com- mon are replaced by the symbol UNK. As in previous work, files F0 to F20 are used for training, F2...

Ngày tải lên: 31/03/2014, 04:20

... lớp dẫn xuất của lớp document. Class Application { //Các khai báo khác Public: Document* CreateDocument(); //Các khai báo khác }; Document* Application::CreateDocument() { Document* ... mô hình Model/View/Controller của Smalltalk trong đó tất cả các views của model đều đựơc thông báo khi trạng thái của model có sự thay đổi. Một số mẫu hành vi khác lại quan tâm đến việc đóng...

Ngày tải lên: 24/08/2012, 13:53