216 research outputs found
TUNNEL DIODE AND RESONANT TUNNELING DIODE CHARACTERIZATION AND MODELING
No full textMaster'sMASTER OF SCIENCEDissertation advisor: Assoc. Professor Wu Ping, AMM&NS and NUS fellow, IME project supervisor: Dr. Lin Fujiang, Institute of Microelectronic
SHELLFISH AND FISH BIODIVERSITY OF MANGROVE ECOSYSTEMS IN LEIZHOU PENINSULA, CHINA
Get PDFLeizhou Peninsula is located in the south most continental tip of China with longitude 109:30110d, latitude 2012 2 35, and with a north tropical oceanic monsoon climate. Among its total inter tide area 99 100 hm2, its mangrove wetlands occupy an area of 20 279 hm2, including 7 305.8 hm2 mangrove and 9 609.7hm2 mudflats suitable for mangrove growing, and was designated as one of wetlands of international importance by the centre government of The People’s Republic of China in January 2002. The survey we carried out into the eight major mangrove areas of Leizhou Peninsula by using various nets and tools between July 14 and September 4, 2002 showed that there were 3 order 38 family 110 species of shellfish and 127 species of fish, belonging to 15 order 58 family 100 genera, living in the mangrove areas. Among them, more than 28 species of shellfish and 34 species of fish were regarded as economical species with some importance of economy respectively. The structures of shellfish and fish resource were discussed, and the authors proposed that the conservation efforts should be secured for future sustainable development of the mangrove biodiversity resources in Leizhou Peninsula
Water Quality Assessment on Fujiang River of China Using Projection Pursuit Model
No full textDue to the increasingly serious water quality degradation on river, the study on river water quality status assessment has attracted more and more attention of the researchers and decision-makers. In this paper, water quality assessment of Fujiang River from January 2005 to December 2005 was studied by projection pursuit model (PPM). The water quality status of Fujiang River was assessed by the use of 10 monitoring sections, with DO, CODMn, BOD5, NH3-N, Petroleum, and Volatile phenol indicators. Based on the PPM analysis procedures, the assessed sections are described into 1 “category 1”, 4 “category 2” and 5 “category 3” states in 2005. The relative comparison results show that water quality status spatial order of Fujiang River from bad to good is: Fj09<Fj02< Fj10<Fj07< Fj03<Fj05<Fj04< Fj06<Fj08<Fj01.</jats:p
LARGE SIGNAL MODELING OF GAAS FETS FOR THE SIMULATION OF NONLINEAR MICROWAVE CIRCUITS
No full textPh.DDOCTOR OF PHILOSOPH
MMIC LNA DESIGN AND GAAS FET MODELING : DC, SMALL-SIGNAL, AND NOISE
No full textMaster'sMASTER OF ENGINEERIN
Design of a compact ultra wideband 3-dB microstrip-slot coupler with high return losses and isolation
No full textThe paper presents the configuration and design method of a compact ultra wideband 3 dB directional coupler with high return loss and isolation. The proposed device is formed by two elliptically shaped microstrip lines, which are broadside coupled through an elliptically shaped slot. In order to improve this coupler's return loss and isolation characteristics a small conducting disk of elliptical shape is included between the two microstrip lines. Results of the full electromagnetic simulations show that the coupler exhibits a coupling of 3.4 dB �± 1.2 dB accompanied by the isolation and return loss of more than 28 dB across the frequency band of 3.0 to 12.0 GHz
Scaphoideus festivus Matsumura
No full textScaphoideus festivus Matsumura (Figs 23–34) Scaphoideus festivus Matsumura, 1902: 384; Li et al., 2011: 222; Yang et al., 2012: 115. Host plant. Rice (Oryza sativa L.), orange (Citrus reticulata Banco), tea plant (Camellia sinensis (L.) O. Kuntze) and bamboo (Yang et al., 2012). Distribution. China (Guizhou, Yunnan, Sichuan, Shaanxi, Ningxia, Hunan, Beijing, Hebei, Henan, Jiangxi, Fujiang, Guangdong, Guangxi, Hainan and Taiwan); India, Sri Lanka, Japan and Korea. Material examined. 1 3, Lushan, Jiangxi, 6 July 1975, Y.-J. Lin; 2 3, 3 ƤƤ, Luodian, Guizhou, 9 July 1981, Z.-Z. Li; 2 3, 1 Ƥ, Nanchang, Jiangxi, 17 July 1983, Y.-J. Li; 3 3, 4 ƤƤ, Libo, Guizhou, 12 Aug. 1984, Z.-Z. Li; 1 3, 6 ƤƤ, Fanjingshan, Guizhou, 26 June 1986, Z.-Z. Li; 5 3, 6 ƤƤ, Daozhen, Guizhou, 17 Sep. 1988, Z.- Z. Li; 3 3, 1 Ƥ, Dazu, Sichuan, 17 Sep. 1994, M.-F. Yang; 2 3, 1 Ƥ, Huaping, Guangxi, 6 June 1997, M.-F. Yang and L.-M. Wang; 5 3, 3 ƤƤ, Libo, Guizhou, 27 Oct. 1998, Z.-Z. Li; 1 3, Qianlin Park, Guiyang, Guizhou, bamboo, 3 July 1999, X.-S. Chen; 2 3, 4 ƤƤ, Shaolinsi, Henan, 16 July 2002, X.-S. Chen; 2 3, 3 ƤƤ, Dashahe, Daozhen, Guizhou, 15 May 2008, Q.-Z. Song; 3 3, 4 ƤƤ, Wenan, Hebei, 22 July 2008, X.-H. Jiang; 1 3, Liupanshan, Ningxia, 28 July 2009, Z.-H. Yang.Published as part of Yang, Lin, Chen, Xiang-Sheng & Li, Zi-Zhong, 2013, Review of the bamboo-feeding species of genus Scaphoideus (Hemiptera: Cicadellidae: Deltocephalinae) from China, with description of one new species, pp. 557-568 in Zootaxa 3619 (5) on page 559, DOI: 10.11646/zootaxa.3619.5.5, http://zenodo.org/record/21896
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