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Traditional radar emitter identification methods can no longer meet the needs of identifying new-system radar emitters in the complicate and changeable electromagnetic environment.Deep learning methods can effectively extract the intra-pulse features of the unsorting radar emitter signal,quickly and accurately identify the radar intra-pulse modulation type,model type and emitter individual under complex environments such as low signal-to-noise ratio.However,in the reality,radar emitter signal is difficult to collect and cannot satisfy the training needs of traditional deep learning models.Therefore,the small sample radar emitter identification is one of hotspot and difficult questions of current research.Firstly,this paper reviews the research progress and application of various deep learning methods based on supervised learning for radar emitter recognition with small samples in recent years.Secondly,the research progress of radar emitter identification by small sample learning is introduced.Last,according to the current radar emitter identification research,the challenges and outlook for future research are put forward.

Objective To learn morbidity of early repolarization syndrome (ERS) and its relation to sex, age and amount of labour. Methods A census of cases with ER was performed separately in 19, 795, 25, 372 and 20, 712 subjects by means of cluster sampling in 2001∼2002, 2004∼2005 and 2007∼2008. Results ERS total morbidity was 3. 40%, 2. 72% and 2. 73%. ER morbidy in man was 3. 99%, 3. 85% , 4. 01% and that in woman was 0. 46%, 0. 24%, and 0. 20%. In man ER morbidity at age of 21∼30 years old was 4. 50%, 4. 44%, and 4. 50%, at age of 31∼40 years old was 4. 24%, 4. 07% , and 4. 27% and at age of 41∼50 years old was 2. 78%, 2. 62%, and 2. 81%. In woman ER morbidity at age of 21∼30 years old was 0. 51%, 0. 38%, and 0. 26%, at age of 31∼40 years old was 0. 49%, 0. 20%, and 0. 20% and at age of 41∼50 years old was 0. 34%, 0. 18%, and 0. 15%. ERS prevalence in heavy amount of labour individuals was 4. 12%, 2. 93%, and 3. 03% and that in light amount of labour individuals was 2. 42%, 2. 32%, and 2. 21%. Conclusion ERS prevalence was higher in young men, furthermore, ERs prevalence in heavy labour intensity was higher than in light labour intendity this finding provides support for a vagal oringin of ER. [ABSTRACT FROM AUTHOR]

Ojective: To construct the engineering bacteria with recombinant plasmid expressing the multi-epitope vaccine which composed of Helicobacter pylori urea membrane channel protein (UreI), Helicobacter pylori urease B subunit (UreB) and cholera toxin B subunit (CTB), and then to study it's microbiological characteristics., Methods: The sequence contains some dominant epitopes of Helicobacter pylori UreI and UreB was designed, and ctB was added at the N-terminal, all the sequence were linked by flexible linkers. Codon optimization was done according to Escherichia coli (E. coli) BL21 (DE3) bias, the optimized sequence was designated BIB. BIB sequence was synthesized and cloned into plasmid pET28a(+). The recombinant plasmid was confirmed by restriction enzyme digestion and DNA sequencing. The recombinant protein BIB was expressed in E. coli BL21 (DE3) and analyzed by Western blot., Results: The plasmid of pET28a(+)/BIB was constructed successfully, confirmed by restriction enzyme digestion and DNA sequencing. The recombinant protein BIB with relative molecular mass about 33 x 10(3) could be produced by E. coli BL21 (DE3) and was detected by Western blot. The relative molecular mass and N-terminal amino acid sequence of BIB were 100% identity with the design., Conclution: The engineering bacteria with recombinant plasmid expressing the multi-epitope vaccine against Helicobacter pylori was constructed successfully. The recombinant protein BIB can be identified by anti-Sydney strain 1 of Helicobacter pylori (H. pylori SS1) polyclonal antibody and anti-CTB monoclonal antibody, which demonstrated that BIB has the expected antigenicity.

Objective: To construct the suicidal DNA vaccine of human papillomavirus type 16 E7 gene (HPV16), and explore the DNA vaccine expression characteristics in vitro and capacity of inducing the transfected cells into apoptosis., Methods: HPV16 E7 gene cloned by PCR from pET32/E7 was inserted into the plasmid pSCA1 to construct the recombinant plasmid pSCA/E7, followed by identification with PCR, BamH I and Sma I digestion and sequencing. pSCA/E7 was then used to transfect BHK-21 cell line. The transient expression of HPV16 E7 gene was confirmed by immuno-fluorescent staining, and the apoptosis induced by pSCA/E7 was checked with TDT-mediated dUTP nick end-labeling (TUNEL)., Results: The cloned E7 gene fragment was about 400 bp in length. PCR, restriction endonuclease digestion and sequence analysis revealed that the HPV16 E7 gene was cloned into the eukaryotic expression plasmid pSCA1 successfully. Immunofluorescent staining confirmed that the E7 gene could express in BHK-21 cell line. The BHK-21 cells transfected with pSCA/E7 could be induced into apoptosis which was confirmed by TUNEL., Conclusion: The results show that HPV16 E7 suicidal DNA vaccine can express in BHK-21 cell line, and induce the pSCA/E7 transfected cells into apoptosis. These findings may provide the foundation for exploring the therapeutic vaccine against HPV16-associated cervical cancer.